diff -Nur icedtea-2.4.7.orig/Makefile.in icedtea-2.4.7/Makefile.in --- icedtea-2.4.7.orig/Makefile.in 2014-04-16 06:20:44.689988653 +0200 +++ icedtea-2.4.7/Makefile.in 2014-05-01 13:34:58.421434811 +0200 @@ -712,7 +712,7 @@ $(am__append_14) $(am__append_15) $(DISTRIBUTION_PATCHES) # Bootstrapping patches -ICEDTEA_BOOT_PATCHES = patches/boot/javafiles.patch \ +ICEDTEA_BOOT_PATCHES = patches/openadk.patch patches/boot/javafiles.patch \ patches/boot/ant-javac.patch patches/boot/corba-idlj.patch \ patches/boot/corba-no-gen.patch patches/boot/corba-orb.patch \ patches/boot/demos.patch patches/boot/fphexconstants.patch \ diff -Nur icedtea-2.4.7.orig/patches/openadk.patch icedtea-2.4.7/patches/openadk.patch --- icedtea-2.4.7.orig/patches/openadk.patch 1970-01-01 01:00:00.000000000 +0100 +++ icedtea-2.4.7/patches/openadk.patch 2014-05-15 15:52:54.503242117 +0200 @@ -0,0 +1,7020 @@ +diff -Nur openjdk.orig/hotspot/make/linux/makefiles/zeroshark.make openjdk/hotspot/make/linux/makefiles/zeroshark.make +--- openjdk.orig/hotspot/make/linux/makefiles/zeroshark.make 2014-02-20 19:51:45.000000000 +0100 ++++ openjdk/hotspot/make/linux/makefiles/zeroshark.make 2014-05-13 16:56:38.917714592 +0200 +@@ -39,20 +39,20 @@ + + offsets_arm.s: mkoffsets + @echo Generating assembler offsets +- ./mkoffsets > $@ ++ $(QEMU) ./mkoffsets > $@ + + bytecodes_arm.s: bytecodes_arm.def mkbc + @echo Generating ARM assembler bytecode sequences +- $(CXX_COMPILE) -E -x c++ - < $< | ./mkbc - $@ $(COMPILE_DONE) ++ $(CXX_COMPILE) -E -x c++ - < $< | $(QEMU) ./mkbc - $@ $(COMPILE_DONE) + + mkbc: $(GAMMADIR)/tools/mkbc.c + @echo Compiling mkbc tool +- $(CC_COMPILE) -o $@ $< $(COMPILE_DONE) ++ $(CC_COMPILE) -static -o $@ $< $(COMPILE_DONE) + + mkoffsets: asm_helper.cpp + @echo Compiling offset generator + $(QUIETLY) $(REMOVE_TARGET) +- $(CXX_COMPILE) -DSTATIC_OFFSETS -o $@ $< $(COMPILE_DONE) ++ $(CXX_COMPILE) -static -DSTATIC_OFFSETS -o $@ $< $(COMPILE_DONE) + + endif + endif +diff -Nur openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp openjdk/hotspot/src/os/linux/vm/os_linux.cpp +--- openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp 2014-02-20 19:51:45.000000000 +0100 ++++ openjdk/hotspot/src/os/linux/vm/os_linux.cpp 2014-05-13 16:14:56.637091447 +0200 +@@ -112,7 +112,6 @@ + # include + # include + # include +-# include + # include + # include + # include +@@ -650,9 +649,7 @@ + os::Linux::set_glibc_version(str); + } else { + // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() +- static char _gnu_libc_version[32]; +- jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), +- "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); ++ static char _gnu_libc_version[32] = "2.9"; + os::Linux::set_glibc_version(_gnu_libc_version); + } + +@@ -2951,10 +2948,7 @@ + // If we are running with earlier version, which did not have symbol versions, + // we should use the base version. + void* os::Linux::libnuma_dlsym(void* handle, const char *name) { +- void *f = dlvsym(handle, name, "libnuma_1.1"); +- if (f == NULL) { +- f = dlsym(handle, name); +- } ++ void *f = dlsym(handle, name); + return f; + } + +@@ -5329,7 +5323,21 @@ + // Linux doesn't yet have a (official) notion of processor sets, + // so just return the system wide load average. + int os::loadavg(double loadavg[], int nelem) { +- return ::getloadavg(loadavg, nelem); ++ FILE *LOADAVG; ++ double avg[3] = { 0.0, 0.0, 0.0 }; ++ int i, res = -1;; ++ ++ if ((LOADAVG = fopen("/proc/loadavg", "r"))) { ++ fscanf(LOADAVG, "%lf %lf %lf", &avg[0], &avg[1], &avg[2]); ++ res = 0; ++ fclose(LOADAVG); ++ } ++ ++ for (i = 0; (i < nelem) && (i < 3); i++) { ++ loadavg[i] = avg[i]; ++ } ++ ++ return res; + } + + void os::pause() { +diff -Nur openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp.orig openjdk/hotspot/src/os/linux/vm/os_linux.cpp.orig +--- openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp.orig 1970-01-01 01:00:00.000000000 +0100 ++++ openjdk/hotspot/src/os/linux/vm/os_linux.cpp.orig 2014-02-20 19:51:45.000000000 +0100 +@@ -0,0 +1,5989 @@ ++/* ++ * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. ++ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. ++ * ++ * This code is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 only, as ++ * published by the Free Software Foundation. ++ * ++ * This code is distributed in the hope that it will be useful, but WITHOUT ++ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ++ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ++ * version 2 for more details (a copy is included in the LICENSE file that ++ * accompanied this code). ++ * ++ * You should have received a copy of the GNU General Public License version ++ * 2 along with this work; if not, write to the Free Software Foundation, ++ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. ++ * ++ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA ++ * or visit www.oracle.com if you need additional information or have any ++ * questions. ++ * ++ */ ++ ++// no precompiled headers ++#include "classfile/classLoader.hpp" ++#include "classfile/systemDictionary.hpp" ++#include "classfile/vmSymbols.hpp" ++#include "code/icBuffer.hpp" ++#include "code/vtableStubs.hpp" ++#include "compiler/compileBroker.hpp" ++#include "interpreter/interpreter.hpp" ++#include "jvm_linux.h" ++#include "memory/allocation.inline.hpp" ++#include "memory/filemap.hpp" ++#include "mutex_linux.inline.hpp" ++#include "oops/oop.inline.hpp" ++#include "os_share_linux.hpp" ++#include "prims/jniFastGetField.hpp" ++#include "prims/jvm.h" ++#include "prims/jvm_misc.hpp" ++#include "runtime/arguments.hpp" ++#include "runtime/extendedPC.hpp" ++#include "runtime/globals.hpp" ++#include "runtime/interfaceSupport.hpp" ++#include "runtime/init.hpp" ++#include "runtime/java.hpp" ++#include "runtime/javaCalls.hpp" ++#include "runtime/mutexLocker.hpp" ++#include "runtime/objectMonitor.hpp" ++#include "runtime/osThread.hpp" ++#include "runtime/perfMemory.hpp" ++#include "runtime/sharedRuntime.hpp" ++#include "runtime/statSampler.hpp" ++#include "runtime/stubRoutines.hpp" ++#include "runtime/threadCritical.hpp" ++#include "runtime/timer.hpp" ++#include "services/attachListener.hpp" ++#include "services/memTracker.hpp" ++#include "services/runtimeService.hpp" ++#include "thread_linux.inline.hpp" ++#include "utilities/decoder.hpp" ++#include "utilities/defaultStream.hpp" ++#include "utilities/events.hpp" ++#include "utilities/elfFile.hpp" ++#include "utilities/growableArray.hpp" ++#include "utilities/vmError.hpp" ++#ifdef TARGET_ARCH_x86 ++# include "assembler_x86.inline.hpp" ++# include "nativeInst_x86.hpp" ++#endif ++#ifdef TARGET_ARCH_sparc ++# include "assembler_sparc.inline.hpp" ++# include "nativeInst_sparc.hpp" ++#endif ++#ifdef TARGET_ARCH_zero ++# include "assembler_zero.inline.hpp" ++# include "nativeInst_zero.hpp" ++#endif ++#ifdef TARGET_ARCH_arm ++# include "assembler_arm.inline.hpp" ++# include "nativeInst_arm.hpp" ++#endif ++#ifdef TARGET_ARCH_ppc ++# include "assembler_ppc.inline.hpp" ++# include "nativeInst_ppc.hpp" ++#endif ++ ++// put OS-includes here ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++# include ++ ++#define MAX_PATH (2 * K) ++ ++// for timer info max values which include all bits ++#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) ++ ++#define LARGEPAGES_BIT (1 << 6) ++ ++#ifndef EM_AARCH64 ++#define EM_AARCH64 183 /* ARM AARCH64 */ ++#endif ++ ++//////////////////////////////////////////////////////////////////////////////// ++// global variables ++julong os::Linux::_physical_memory = 0; ++ ++address os::Linux::_initial_thread_stack_bottom = NULL; ++uintptr_t os::Linux::_initial_thread_stack_size = 0; ++ ++int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; ++int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; ++Mutex* os::Linux::_createThread_lock = NULL; ++pthread_t os::Linux::_main_thread; ++int os::Linux::_page_size = -1; ++const int os::Linux::_vm_default_page_size = (8 * K); ++bool os::Linux::_is_floating_stack = false; ++bool os::Linux::_is_NPTL = false; ++bool os::Linux::_supports_fast_thread_cpu_time = false; ++const char * os::Linux::_glibc_version = NULL; ++const char * os::Linux::_libpthread_version = NULL; ++ ++static jlong initial_time_count=0; ++ ++static int clock_tics_per_sec = 100; ++ ++// For diagnostics to print a message once. see run_periodic_checks ++static sigset_t check_signal_done; ++static bool check_signals = true;; ++ ++static pid_t _initial_pid = 0; ++ ++/* Signal number used to suspend/resume a thread */ ++ ++/* do not use any signal number less than SIGSEGV, see 4355769 */ ++static int SR_signum = SIGUSR2; ++sigset_t SR_sigset; ++ ++/* Used to protect dlsym() calls */ ++static pthread_mutex_t dl_mutex; ++ ++// Declarations ++static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); ++ ++#ifdef JAVASE_EMBEDDED ++class MemNotifyThread: public Thread { ++ friend class VMStructs; ++ public: ++ virtual void run(); ++ ++ private: ++ static MemNotifyThread* _memnotify_thread; ++ int _fd; ++ ++ public: ++ ++ // Constructor ++ MemNotifyThread(int fd); ++ ++ // Tester ++ bool is_memnotify_thread() const { return true; } ++ ++ // Printing ++ char* name() const { return (char*)"Linux MemNotify Thread"; } ++ ++ // Returns the single instance of the MemNotifyThread ++ static MemNotifyThread* memnotify_thread() { return _memnotify_thread; } ++ ++ // Create and start the single instance of MemNotifyThread ++ static void start(); ++}; ++#endif // JAVASE_EMBEDDED ++ ++// utility functions ++ ++static int SR_initialize(); ++static int SR_finalize(); ++ ++julong os::available_memory() { ++ return Linux::available_memory(); ++} ++ ++julong os::Linux::available_memory() { ++ // values in struct sysinfo are "unsigned long" ++ struct sysinfo si; ++ sysinfo(&si); ++ ++ return (julong)si.freeram * si.mem_unit; ++} ++ ++julong os::physical_memory() { ++ return Linux::physical_memory(); ++} ++ ++julong os::allocatable_physical_memory(julong size) { ++#ifdef _LP64 ++ return size; ++#else ++ julong result = MIN2(size, (julong)3800*M); ++ if (!is_allocatable(result)) { ++ // See comments under solaris for alignment considerations ++ julong reasonable_size = (julong)2*G - 2 * os::vm_page_size(); ++ result = MIN2(size, reasonable_size); ++ } ++ return result; ++#endif // _LP64 ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// environment support ++ ++bool os::getenv(const char* name, char* buf, int len) { ++ const char* val = ::getenv(name); ++ if (val != NULL && strlen(val) < (size_t)len) { ++ strcpy(buf, val); ++ return true; ++ } ++ if (len > 0) buf[0] = 0; // return a null string ++ return false; ++} ++ ++ ++// Return true if user is running as root. ++ ++bool os::have_special_privileges() { ++ static bool init = false; ++ static bool privileges = false; ++ if (!init) { ++ privileges = (getuid() != geteuid()) || (getgid() != getegid()); ++ init = true; ++ } ++ return privileges; ++} ++ ++ ++#ifndef SYS_gettid ++// i386: 224, ia64: 1105, amd64: 186, sparc 143 ++#ifdef __ia64__ ++#define SYS_gettid 1105 ++#elif __i386__ ++#define SYS_gettid 224 ++#elif __amd64__ ++#define SYS_gettid 186 ++#elif __sparc__ ++#define SYS_gettid 143 ++#else ++#error define gettid for the arch ++#endif ++#endif ++ ++// Cpu architecture string ++#if defined(ZERO) ++static char cpu_arch[] = ZERO_LIBARCH; ++#elif defined(IA64) ++static char cpu_arch[] = "ia64"; ++#elif defined(IA32) ++static char cpu_arch[] = "i386"; ++#elif defined(AMD64) ++static char cpu_arch[] = "amd64"; ++#elif defined(ARM) ++static char cpu_arch[] = "arm"; ++#elif defined(PPC) ++static char cpu_arch[] = "ppc"; ++#elif defined(SPARC) ++# ifdef _LP64 ++static char cpu_arch[] = "sparcv9"; ++# else ++static char cpu_arch[] = "sparc"; ++# endif ++#else ++#error Add appropriate cpu_arch setting ++#endif ++ ++ ++// pid_t gettid() ++// ++// Returns the kernel thread id of the currently running thread. Kernel ++// thread id is used to access /proc. ++// ++// (Note that getpid() on LinuxThreads returns kernel thread id too; but ++// on NPTL, it returns the same pid for all threads, as required by POSIX.) ++// ++pid_t os::Linux::gettid() { ++ int rslt = syscall(SYS_gettid); ++ if (rslt == -1) { ++ // old kernel, no NPTL support ++ return getpid(); ++ } else { ++ return (pid_t)rslt; ++ } ++} ++ ++// Most versions of linux have a bug where the number of processors are ++// determined by looking at the /proc file system. In a chroot environment, ++// the system call returns 1. This causes the VM to act as if it is ++// a single processor and elide locking (see is_MP() call). ++static bool unsafe_chroot_detected = false; ++static const char *unstable_chroot_error = "/proc file system not found.\n" ++ "Java may be unstable running multithreaded in a chroot " ++ "environment on Linux when /proc filesystem is not mounted."; ++ ++void os::Linux::initialize_system_info() { ++ set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); ++ if (processor_count() == 1) { ++ pid_t pid = os::Linux::gettid(); ++ char fname[32]; ++ jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); ++ FILE *fp = fopen(fname, "r"); ++ if (fp == NULL) { ++ unsafe_chroot_detected = true; ++ } else { ++ fclose(fp); ++ } ++ } ++ _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); ++ assert(processor_count() > 0, "linux error"); ++} ++ ++void os::init_system_properties_values() { ++// char arch[12]; ++// sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); ++ ++ // The next steps are taken in the product version: ++ // ++ // Obtain the JAVA_HOME value from the location of libjvm[_g].so. ++ // This library should be located at: ++ // /jre/lib//{client|server}/libjvm[_g].so. ++ // ++ // If "/jre/lib/" appears at the right place in the path, then we ++ // assume libjvm[_g].so is installed in a JDK and we use this path. ++ // ++ // Otherwise exit with message: "Could not create the Java virtual machine." ++ // ++ // The following extra steps are taken in the debugging version: ++ // ++ // If "/jre/lib/" does NOT appear at the right place in the path ++ // instead of exit check for $JAVA_HOME environment variable. ++ // ++ // If it is defined and we are able to locate $JAVA_HOME/jre/lib/, ++ // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so ++ // it looks like libjvm[_g].so is installed there ++ // /jre/lib//hotspot/libjvm[_g].so. ++ // ++ // Otherwise exit. ++ // ++ // Important note: if the location of libjvm.so changes this ++ // code needs to be changed accordingly. ++ ++ // The next few definitions allow the code to be verbatim: ++#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) ++#define getenv(n) ::getenv(n) ++ ++/* ++ * See ld(1): ++ * The linker uses the following search paths to locate required ++ * shared libraries: ++ * 1: ... ++ * ... ++ * 7: The default directories, normally /lib and /usr/lib. ++ */ ++#if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390) || defined(AARCH64)) ++#define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib" ++#else ++#define DEFAULT_LIBPATH "/lib:/usr/lib" ++#endif ++ ++#define EXTENSIONS_DIR "/lib/ext" ++#define ENDORSED_DIR "/lib/endorsed" ++#define REG_DIR "/usr/java/packages" ++ ++ { ++ /* sysclasspath, java_home, dll_dir */ ++ { ++ char *home_path; ++ char *dll_path; ++ char *pslash; ++ char buf[MAXPATHLEN]; ++ os::jvm_path(buf, sizeof(buf)); ++ ++ // Found the full path to libjvm.so. ++ // Now cut the path to /jre if we can. ++ *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ ++ pslash = strrchr(buf, '/'); ++ if (pslash != NULL) ++ *pslash = '\0'; /* get rid of /{client|server|hotspot} */ ++ dll_path = malloc(strlen(buf) + 1); ++ if (dll_path == NULL) ++ return; ++ strcpy(dll_path, buf); ++ Arguments::set_dll_dir(dll_path); ++ ++ if (pslash != NULL) { ++ pslash = strrchr(buf, '/'); ++ if (pslash != NULL) { ++ *pslash = '\0'; /* get rid of / */ ++ pslash = strrchr(buf, '/'); ++ if (pslash != NULL) ++ *pslash = '\0'; /* get rid of /lib */ ++ } ++ } ++ ++ home_path = malloc(strlen(buf) + 1); ++ if (home_path == NULL) ++ return; ++ strcpy(home_path, buf); ++ Arguments::set_java_home(home_path); ++ ++ if (!set_boot_path('/', ':')) ++ return; ++ } ++ ++ /* ++ * Where to look for native libraries ++ * ++ * Note: Due to a legacy implementation, most of the library path ++ * is set in the launcher. This was to accomodate linking restrictions ++ * on legacy Linux implementations (which are no longer supported). ++ * Eventually, all the library path setting will be done here. ++ * ++ * However, to prevent the proliferation of improperly built native ++ * libraries, the new path component /usr/java/packages is added here. ++ * Eventually, all the library path setting will be done here. ++ */ ++ { ++ char *ld_library_path; ++ ++ /* ++ * Construct the invariant part of ld_library_path. Note that the ++ * space for the colon and the trailing null are provided by the ++ * nulls included by the sizeof operator (so actually we allocate ++ * a byte more than necessary). ++ */ ++ ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") + ++ strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH)); ++ sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch); ++ ++ /* ++ * Get the user setting of LD_LIBRARY_PATH, and prepended it. It ++ * should always exist (until the legacy problem cited above is ++ * addressed). ++ */ ++ char *v = getenv("LD_LIBRARY_PATH"); ++ if (v != NULL) { ++ char *t = ld_library_path; ++ /* That's +1 for the colon and +1 for the trailing '\0' */ ++ ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1); ++ sprintf(ld_library_path, "%s:%s", v, t); ++ } ++ Arguments::set_library_path(ld_library_path); ++ } ++ ++ /* ++ * Extensions directories. ++ * ++ * Note that the space for the colon and the trailing null are provided ++ * by the nulls included by the sizeof operator (so actually one byte more ++ * than necessary is allocated). ++ */ ++ { ++ char *buf = malloc(strlen(Arguments::get_java_home()) + ++ sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR)); ++ sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR, ++ Arguments::get_java_home()); ++ Arguments::set_ext_dirs(buf); ++ } ++ ++ /* Endorsed standards default directory. */ ++ { ++ char * buf; ++ buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); ++ sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); ++ Arguments::set_endorsed_dirs(buf); ++ } ++ } ++ ++#undef malloc ++#undef getenv ++#undef EXTENSIONS_DIR ++#undef ENDORSED_DIR ++ ++ // Done ++ return; ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// breakpoint support ++ ++void os::breakpoint() { ++ BREAKPOINT; ++} ++ ++extern "C" void breakpoint() { ++ // use debugger to set breakpoint here ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// signal support ++ ++debug_only(static bool signal_sets_initialized = false); ++static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; ++ ++bool os::Linux::is_sig_ignored(int sig) { ++ struct sigaction oact; ++ sigaction(sig, (struct sigaction*)NULL, &oact); ++ void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) ++ : CAST_FROM_FN_PTR(void*, oact.sa_handler); ++ if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) ++ return true; ++ else ++ return false; ++} ++ ++void os::Linux::signal_sets_init() { ++ // Should also have an assertion stating we are still single-threaded. ++ assert(!signal_sets_initialized, "Already initialized"); ++ // Fill in signals that are necessarily unblocked for all threads in ++ // the VM. Currently, we unblock the following signals: ++ // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden ++ // by -Xrs (=ReduceSignalUsage)); ++ // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all ++ // other threads. The "ReduceSignalUsage" boolean tells us not to alter ++ // the dispositions or masks wrt these signals. ++ // Programs embedding the VM that want to use the above signals for their ++ // own purposes must, at this time, use the "-Xrs" option to prevent ++ // interference with shutdown hooks and BREAK_SIGNAL thread dumping. ++ // (See bug 4345157, and other related bugs). ++ // In reality, though, unblocking these signals is really a nop, since ++ // these signals are not blocked by default. ++ sigemptyset(&unblocked_sigs); ++ sigemptyset(&allowdebug_blocked_sigs); ++ sigaddset(&unblocked_sigs, SIGILL); ++ sigaddset(&unblocked_sigs, SIGSEGV); ++ sigaddset(&unblocked_sigs, SIGBUS); ++ sigaddset(&unblocked_sigs, SIGFPE); ++ sigaddset(&unblocked_sigs, SR_signum); ++ ++ if (!ReduceSignalUsage) { ++ if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { ++ sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); ++ sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); ++ } ++ if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { ++ sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); ++ sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); ++ } ++ if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { ++ sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); ++ sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); ++ } ++ } ++ // Fill in signals that are blocked by all but the VM thread. ++ sigemptyset(&vm_sigs); ++ if (!ReduceSignalUsage) ++ sigaddset(&vm_sigs, BREAK_SIGNAL); ++ debug_only(signal_sets_initialized = true); ++ ++} ++ ++// These are signals that are unblocked while a thread is running Java. ++// (For some reason, they get blocked by default.) ++sigset_t* os::Linux::unblocked_signals() { ++ assert(signal_sets_initialized, "Not initialized"); ++ return &unblocked_sigs; ++} ++ ++// These are the signals that are blocked while a (non-VM) thread is ++// running Java. Only the VM thread handles these signals. ++sigset_t* os::Linux::vm_signals() { ++ assert(signal_sets_initialized, "Not initialized"); ++ return &vm_sigs; ++} ++ ++// These are signals that are blocked during cond_wait to allow debugger in ++sigset_t* os::Linux::allowdebug_blocked_signals() { ++ assert(signal_sets_initialized, "Not initialized"); ++ return &allowdebug_blocked_sigs; ++} ++ ++void os::Linux::hotspot_sigmask(Thread* thread) { ++ ++ //Save caller's signal mask before setting VM signal mask ++ sigset_t caller_sigmask; ++ pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); ++ ++ OSThread* osthread = thread->osthread(); ++ osthread->set_caller_sigmask(caller_sigmask); ++ ++ pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); ++ ++ if (!ReduceSignalUsage) { ++ if (thread->is_VM_thread()) { ++ // Only the VM thread handles BREAK_SIGNAL ... ++ pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); ++ } else { ++ // ... all other threads block BREAK_SIGNAL ++ pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); ++ } ++ } ++} ++ ++////////////////////////////////////////////////////////////////////////////// ++// detecting pthread library ++ ++void os::Linux::libpthread_init() { ++ // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION ++ // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a ++ // generic name for earlier versions. ++ // Define macros here so we can build HotSpot on old systems. ++# ifndef _CS_GNU_LIBC_VERSION ++# define _CS_GNU_LIBC_VERSION 2 ++# endif ++# ifndef _CS_GNU_LIBPTHREAD_VERSION ++# define _CS_GNU_LIBPTHREAD_VERSION 3 ++# endif ++ ++ size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); ++ if (n > 0) { ++ char *str = (char *)malloc(n, mtInternal); ++ confstr(_CS_GNU_LIBC_VERSION, str, n); ++ os::Linux::set_glibc_version(str); ++ } else { ++ // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() ++ static char _gnu_libc_version[32]; ++ jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), ++ "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); ++ os::Linux::set_glibc_version(_gnu_libc_version); ++ } ++ ++ n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); ++ if (n > 0) { ++ char *str = (char *)malloc(n, mtInternal); ++ confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); ++ // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells ++ // us "NPTL-0.29" even we are running with LinuxThreads. Check if this ++ // is the case. LinuxThreads has a hard limit on max number of threads. ++ // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value. ++ // On the other hand, NPTL does not have such a limit, sysconf() ++ // will return -1 and errno is not changed. Check if it is really NPTL. ++ if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 && ++ strstr(str, "NPTL") && ++ sysconf(_SC_THREAD_THREADS_MAX) > 0) { ++ free(str); ++ os::Linux::set_libpthread_version("linuxthreads"); ++ } else { ++ os::Linux::set_libpthread_version(str); ++ } ++ } else { ++ // glibc before 2.3.2 only has LinuxThreads. ++ os::Linux::set_libpthread_version("linuxthreads"); ++ } ++ ++ if (strstr(libpthread_version(), "NPTL")) { ++ os::Linux::set_is_NPTL(); ++ } else { ++ os::Linux::set_is_LinuxThreads(); ++ } ++ ++ // LinuxThreads have two flavors: floating-stack mode, which allows variable ++ // stack size; and fixed-stack mode. NPTL is always floating-stack. ++ if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { ++ os::Linux::set_is_floating_stack(); ++ } ++} ++ ++///////////////////////////////////////////////////////////////////////////// ++// thread stack ++ ++// Force Linux kernel to expand current thread stack. If "bottom" is close ++// to the stack guard, caller should block all signals. ++// ++// MAP_GROWSDOWN: ++// A special mmap() flag that is used to implement thread stacks. It tells ++// kernel that the memory region should extend downwards when needed. This ++// allows early versions of LinuxThreads to only mmap the first few pages ++// when creating a new thread. Linux kernel will automatically expand thread ++// stack as needed (on page faults). ++// ++// However, because the memory region of a MAP_GROWSDOWN stack can grow on ++// demand, if a page fault happens outside an already mapped MAP_GROWSDOWN ++// region, it's hard to tell if the fault is due to a legitimate stack ++// access or because of reading/writing non-exist memory (e.g. buffer ++// overrun). As a rule, if the fault happens below current stack pointer, ++// Linux kernel does not expand stack, instead a SIGSEGV is sent to the ++// application (see Linux kernel fault.c). ++// ++// This Linux feature can cause SIGSEGV when VM bangs thread stack for ++// stack overflow detection. ++// ++// Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do ++// not use this flag. However, the stack of initial thread is not created ++// by pthread, it is still MAP_GROWSDOWN. Also it's possible (though ++// unlikely) that user code can create a thread with MAP_GROWSDOWN stack ++// and then attach the thread to JVM. ++// ++// To get around the problem and allow stack banging on Linux, we need to ++// manually expand thread stack after receiving the SIGSEGV. ++// ++// There are two ways to expand thread stack to address "bottom", we used ++// both of them in JVM before 1.5: ++// 1. adjust stack pointer first so that it is below "bottom", and then ++// touch "bottom" ++// 2. mmap() the page in question ++// ++// Now alternate signal stack is gone, it's harder to use 2. For instance, ++// if current sp is already near the lower end of page 101, and we need to ++// call mmap() to map page 100, it is possible that part of the mmap() frame ++// will be placed in page 100. When page 100 is mapped, it is zero-filled. ++// That will destroy the mmap() frame and cause VM to crash. ++// ++// The following code works by adjusting sp first, then accessing the "bottom" ++// page to force a page fault. Linux kernel will then automatically expand the ++// stack mapping. ++// ++// _expand_stack_to() assumes its frame size is less than page size, which ++// should always be true if the function is not inlined. ++ ++#if __GNUC__ < 3 // gcc 2.x does not support noinline attribute ++#define NOINLINE ++#else ++#define NOINLINE __attribute__ ((noinline)) ++#endif ++ ++static void _expand_stack_to(address bottom) NOINLINE; ++ ++static void _expand_stack_to(address bottom) { ++ address sp; ++ size_t size; ++ volatile char *p; ++ ++ // Adjust bottom to point to the largest address within the same page, it ++ // gives us a one-page buffer if alloca() allocates slightly more memory. ++ bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); ++ bottom += os::Linux::page_size() - 1; ++ ++ // sp might be slightly above current stack pointer; if that's the case, we ++ // will alloca() a little more space than necessary, which is OK. Don't use ++ // os::current_stack_pointer(), as its result can be slightly below current ++ // stack pointer, causing us to not alloca enough to reach "bottom". ++ sp = (address)&sp; ++ ++ if (sp > bottom) { ++ size = sp - bottom; ++ p = (volatile char *)alloca(size); ++ assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); ++ p[0] = '\0'; ++ } ++} ++ ++bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { ++ assert(t!=NULL, "just checking"); ++ assert(t->osthread()->expanding_stack(), "expand should be set"); ++ assert(t->stack_base() != NULL, "stack_base was not initialized"); ++ ++ if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { ++ sigset_t mask_all, old_sigset; ++ sigfillset(&mask_all); ++ pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); ++ _expand_stack_to(addr); ++ pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); ++ return true; ++ } ++ return false; ++} ++ ++////////////////////////////////////////////////////////////////////////////// ++// create new thread ++ ++static address highest_vm_reserved_address(); ++ ++// check if it's safe to start a new thread ++static bool _thread_safety_check(Thread* thread) { ++ if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { ++ // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) ++ // Heap is mmap'ed at lower end of memory space. Thread stacks are ++ // allocated (MAP_FIXED) from high address space. Every thread stack ++ // occupies a fixed size slot (usually 2Mbytes, but user can change ++ // it to other values if they rebuild LinuxThreads). ++ // ++ // Problem with MAP_FIXED is that mmap() can still succeed even part of ++ // the memory region has already been mmap'ed. That means if we have too ++ // many threads and/or very large heap, eventually thread stack will ++ // collide with heap. ++ // ++ // Here we try to prevent heap/stack collision by comparing current ++ // stack bottom with the highest address that has been mmap'ed by JVM ++ // plus a safety margin for memory maps created by native code. ++ // ++ // This feature can be disabled by setting ThreadSafetyMargin to 0 ++ // ++ if (ThreadSafetyMargin > 0) { ++ address stack_bottom = os::current_stack_base() - os::current_stack_size(); ++ ++ // not safe if our stack extends below the safety margin ++ return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); ++ } else { ++ return true; ++ } ++ } else { ++ // Floating stack LinuxThreads or NPTL: ++ // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When ++ // there's not enough space left, pthread_create() will fail. If we come ++ // here, that means enough space has been reserved for stack. ++ return true; ++ } ++} ++ ++// Thread start routine for all newly created threads ++static void *java_start(Thread *thread) { ++ // Try to randomize the cache line index of hot stack frames. ++ // This helps when threads of the same stack traces evict each other's ++ // cache lines. The threads can be either from the same JVM instance, or ++ // from different JVM instances. The benefit is especially true for ++ // processors with hyperthreading technology. ++ static int counter = 0; ++ int pid = os::current_process_id(); ++ alloca(((pid ^ counter++) & 7) * 128); ++ ++ ThreadLocalStorage::set_thread(thread); ++ ++ OSThread* osthread = thread->osthread(); ++ Monitor* sync = osthread->startThread_lock(); ++ ++ // non floating stack LinuxThreads needs extra check, see above ++ if (!_thread_safety_check(thread)) { ++ // notify parent thread ++ MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); ++ osthread->set_state(ZOMBIE); ++ sync->notify_all(); ++ return NULL; ++ } ++ ++ // thread_id is kernel thread id (similar to Solaris LWP id) ++ osthread->set_thread_id(os::Linux::gettid()); ++ ++ if (UseNUMA) { ++ int lgrp_id = os::numa_get_group_id(); ++ if (lgrp_id != -1) { ++ thread->set_lgrp_id(lgrp_id); ++ } ++ } ++ // initialize signal mask for this thread ++ os::Linux::hotspot_sigmask(thread); ++ ++ // initialize floating point control register ++ os::Linux::init_thread_fpu_state(); ++ ++ // handshaking with parent thread ++ { ++ MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); ++ ++ // notify parent thread ++ osthread->set_state(INITIALIZED); ++ sync->notify_all(); ++ ++ // wait until os::start_thread() ++ while (osthread->get_state() == INITIALIZED) { ++ sync->wait(Mutex::_no_safepoint_check_flag); ++ } ++ } ++ ++ // call one more level start routine ++ thread->run(); ++ ++ return 0; ++} ++ ++bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { ++ assert(thread->osthread() == NULL, "caller responsible"); ++ ++ // Allocate the OSThread object ++ OSThread* osthread = new OSThread(NULL, NULL); ++ if (osthread == NULL) { ++ return false; ++ } ++ ++ // set the correct thread state ++ osthread->set_thread_type(thr_type); ++ ++ // Initial state is ALLOCATED but not INITIALIZED ++ osthread->set_state(ALLOCATED); ++ ++ thread->set_osthread(osthread); ++ ++ // init thread attributes ++ pthread_attr_t attr; ++ pthread_attr_init(&attr); ++ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); ++ ++ // stack size ++ if (os::Linux::supports_variable_stack_size()) { ++ // calculate stack size if it's not specified by caller ++ if (stack_size == 0) { ++ stack_size = os::Linux::default_stack_size(thr_type); ++ ++ switch (thr_type) { ++ case os::java_thread: ++ // Java threads use ThreadStackSize which default value can be ++ // changed with the flag -Xss ++ assert (JavaThread::stack_size_at_create() > 0, "this should be set"); ++ stack_size = JavaThread::stack_size_at_create(); ++ break; ++ case os::compiler_thread: ++ if (CompilerThreadStackSize > 0) { ++ stack_size = (size_t)(CompilerThreadStackSize * K); ++ break; ++ } // else fall through: ++ // use VMThreadStackSize if CompilerThreadStackSize is not defined ++ case os::vm_thread: ++ case os::pgc_thread: ++ case os::cgc_thread: ++ case os::watcher_thread: ++ if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); ++ break; ++ } ++ } ++ ++ stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); ++ pthread_attr_setstacksize(&attr, stack_size); ++ } else { ++ // let pthread_create() pick the default value. ++ } ++ ++ // glibc guard page ++ pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); ++ ++ ThreadState state; ++ ++ { ++ // Serialize thread creation if we are running with fixed stack LinuxThreads ++ bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); ++ if (lock) { ++ os::Linux::createThread_lock()->lock_without_safepoint_check(); ++ } ++ ++ pthread_t tid; ++ int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); ++ ++ pthread_attr_destroy(&attr); ++ ++ if (ret != 0) { ++ if (PrintMiscellaneous && (Verbose || WizardMode)) { ++ perror("pthread_create()"); ++ } ++ // Need to clean up stuff we've allocated so far ++ thread->set_osthread(NULL); ++ delete osthread; ++ if (lock) os::Linux::createThread_lock()->unlock(); ++ return false; ++ } ++ ++ // Store pthread info into the OSThread ++ osthread->set_pthread_id(tid); ++ ++ // Wait until child thread is either initialized or aborted ++ { ++ Monitor* sync_with_child = osthread->startThread_lock(); ++ MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); ++ while ((state = osthread->get_state()) == ALLOCATED) { ++ sync_with_child->wait(Mutex::_no_safepoint_check_flag); ++ } ++ } ++ ++ if (lock) { ++ os::Linux::createThread_lock()->unlock(); ++ } ++ } ++ ++ // Aborted due to thread limit being reached ++ if (state == ZOMBIE) { ++ thread->set_osthread(NULL); ++ delete osthread; ++ return false; ++ } ++ ++ // The thread is returned suspended (in state INITIALIZED), ++ // and is started higher up in the call chain ++ assert(state == INITIALIZED, "race condition"); ++ return true; ++} ++ ++///////////////////////////////////////////////////////////////////////////// ++// attach existing thread ++ ++// bootstrap the main thread ++bool os::create_main_thread(JavaThread* thread) { ++ assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); ++ return create_attached_thread(thread); ++} ++ ++bool os::create_attached_thread(JavaThread* thread) { ++#ifdef ASSERT ++ thread->verify_not_published(); ++#endif ++ ++ // Allocate the OSThread object ++ OSThread* osthread = new OSThread(NULL, NULL); ++ ++ if (osthread == NULL) { ++ return false; ++ } ++ ++ // Store pthread info into the OSThread ++ osthread->set_thread_id(os::Linux::gettid()); ++ osthread->set_pthread_id(::pthread_self()); ++ ++ // initialize floating point control register ++ os::Linux::init_thread_fpu_state(); ++ ++ // Initial thread state is RUNNABLE ++ osthread->set_state(RUNNABLE); ++ ++ thread->set_osthread(osthread); ++ ++ if (UseNUMA) { ++ int lgrp_id = os::numa_get_group_id(); ++ if (lgrp_id != -1) { ++ thread->set_lgrp_id(lgrp_id); ++ } ++ } ++ ++ if (os::Linux::is_initial_thread()) { ++ // If current thread is initial thread, its stack is mapped on demand, ++ // see notes about MAP_GROWSDOWN. Here we try to force kernel to map ++ // the entire stack region to avoid SEGV in stack banging. ++ // It is also useful to get around the heap-stack-gap problem on SuSE ++ // kernel (see 4821821 for details). We first expand stack to the top ++ // of yellow zone, then enable stack yellow zone (order is significant, ++ // enabling yellow zone first will crash JVM on SuSE Linux), so there ++ // is no gap between the last two virtual memory regions. ++ ++ JavaThread *jt = (JavaThread *)thread; ++ address addr = jt->stack_yellow_zone_base(); ++ assert(addr != NULL, "initialization problem?"); ++ assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); ++ ++ osthread->set_expanding_stack(); ++ os::Linux::manually_expand_stack(jt, addr); ++ osthread->clear_expanding_stack(); ++ } ++ ++ // initialize signal mask for this thread ++ // and save the caller's signal mask ++ os::Linux::hotspot_sigmask(thread); ++ ++ return true; ++} ++ ++void os::pd_start_thread(Thread* thread) { ++ OSThread * osthread = thread->osthread(); ++ assert(osthread->get_state() != INITIALIZED, "just checking"); ++ Monitor* sync_with_child = osthread->startThread_lock(); ++ MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); ++ sync_with_child->notify(); ++} ++ ++// Free Linux resources related to the OSThread ++void os::free_thread(OSThread* osthread) { ++ assert(osthread != NULL, "osthread not set"); ++ ++ if (Thread::current()->osthread() == osthread) { ++ // Restore caller's signal mask ++ sigset_t sigmask = osthread->caller_sigmask(); ++ pthread_sigmask(SIG_SETMASK, &sigmask, NULL); ++ } ++ ++ delete osthread; ++} ++ ++////////////////////////////////////////////////////////////////////////////// ++// thread local storage ++ ++int os::allocate_thread_local_storage() { ++ pthread_key_t key; ++ int rslt = pthread_key_create(&key, NULL); ++ assert(rslt == 0, "cannot allocate thread local storage"); ++ return (int)key; ++} ++ ++// Note: This is currently not used by VM, as we don't destroy TLS key ++// on VM exit. ++void os::free_thread_local_storage(int index) { ++ int rslt = pthread_key_delete((pthread_key_t)index); ++ assert(rslt == 0, "invalid index"); ++} ++ ++void os::thread_local_storage_at_put(int index, void* value) { ++ int rslt = pthread_setspecific((pthread_key_t)index, value); ++ assert(rslt == 0, "pthread_setspecific failed"); ++} ++ ++extern "C" Thread* get_thread() { ++ return ThreadLocalStorage::thread(); ++} ++ ++////////////////////////////////////////////////////////////////////////////// ++// initial thread ++ ++// Check if current thread is the initial thread, similar to Solaris thr_main. ++bool os::Linux::is_initial_thread(void) { ++ char dummy; ++ // If called before init complete, thread stack bottom will be null. ++ // Can be called if fatal error occurs before initialization. ++ if (initial_thread_stack_bottom() == NULL) return false; ++ assert(initial_thread_stack_bottom() != NULL && ++ initial_thread_stack_size() != 0, ++ "os::init did not locate initial thread's stack region"); ++ if ((address)&dummy >= initial_thread_stack_bottom() && ++ (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) ++ return true; ++ else return false; ++} ++ ++// Find the virtual memory area that contains addr ++static bool find_vma(address addr, address* vma_low, address* vma_high) { ++ FILE *fp = fopen("/proc/self/maps", "r"); ++ if (fp) { ++ address low, high; ++ while (!feof(fp)) { ++ if (fscanf(fp, "%p-%p", &low, &high) == 2) { ++ if (low <= addr && addr < high) { ++ if (vma_low) *vma_low = low; ++ if (vma_high) *vma_high = high; ++ fclose (fp); ++ return true; ++ } ++ } ++ for (;;) { ++ int ch = fgetc(fp); ++ if (ch == EOF || ch == (int)'\n') break; ++ } ++ } ++ fclose(fp); ++ } ++ return false; ++} ++ ++// Locate initial thread stack. This special handling of initial thread stack ++// is needed because pthread_getattr_np() on most (all?) Linux distros returns ++// bogus value for initial thread. ++void os::Linux::capture_initial_stack(size_t max_size) { ++ // stack size is the easy part, get it from RLIMIT_STACK ++ size_t stack_size; ++ struct rlimit rlim; ++ getrlimit(RLIMIT_STACK, &rlim); ++ stack_size = rlim.rlim_cur; ++ ++ // 6308388: a bug in ld.so will relocate its own .data section to the ++ // lower end of primordial stack; reduce ulimit -s value a little bit ++ // so we won't install guard page on ld.so's data section. ++ stack_size -= 2 * page_size(); ++ ++ // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat ++ // 7.1, in both cases we will get 2G in return value. ++ // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0, ++ // SuSE 7.2, Debian) can not handle alternate signal stack correctly ++ // for initial thread if its stack size exceeds 6M. Cap it at 2M, ++ // in case other parts in glibc still assumes 2M max stack size. ++ // FIXME: alt signal stack is gone, maybe we can relax this constraint? ++#ifndef IA64 ++ if (stack_size > 2 * K * K) stack_size = 2 * K * K; ++#else ++ // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small ++ if (stack_size > 4 * K * K) stack_size = 4 * K * K; ++#endif ++ ++ // Try to figure out where the stack base (top) is. This is harder. ++ // ++ // When an application is started, glibc saves the initial stack pointer in ++ // a global variable "__libc_stack_end", which is then used by system ++ // libraries. __libc_stack_end should be pretty close to stack top. The ++ // variable is available since the very early days. However, because it is ++ // a private interface, it could disappear in the future. ++ // ++ // Linux kernel saves start_stack information in /proc//stat. Similar ++ // to __libc_stack_end, it is very close to stack top, but isn't the real ++ // stack top. Note that /proc may not exist if VM is running as a chroot ++ // program, so reading /proc//stat could fail. Also the contents of ++ // /proc//stat could change in the future (though unlikely). ++ // ++ // We try __libc_stack_end first. If that doesn't work, look for ++ // /proc//stat. If neither of them works, we use current stack pointer ++ // as a hint, which should work well in most cases. ++ ++ uintptr_t stack_start; ++ ++ // try __libc_stack_end first ++ uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); ++ if (p && *p) { ++ stack_start = *p; ++ } else { ++ // see if we can get the start_stack field from /proc/self/stat ++ FILE *fp; ++ int pid; ++ char state; ++ int ppid; ++ int pgrp; ++ int session; ++ int nr; ++ int tpgrp; ++ unsigned long flags; ++ unsigned long minflt; ++ unsigned long cminflt; ++ unsigned long majflt; ++ unsigned long cmajflt; ++ unsigned long utime; ++ unsigned long stime; ++ long cutime; ++ long cstime; ++ long prio; ++ long nice; ++ long junk; ++ long it_real; ++ uintptr_t start; ++ uintptr_t vsize; ++ intptr_t rss; ++ uintptr_t rsslim; ++ uintptr_t scodes; ++ uintptr_t ecode; ++ int i; ++ ++ // Figure what the primordial thread stack base is. Code is inspired ++ // by email from Hans Boehm. /proc/self/stat begins with current pid, ++ // followed by command name surrounded by parentheses, state, etc. ++ char stat[2048]; ++ int statlen; ++ ++ fp = fopen("/proc/self/stat", "r"); ++ if (fp) { ++ statlen = fread(stat, 1, 2047, fp); ++ stat[statlen] = '\0'; ++ fclose(fp); ++ ++ // Skip pid and the command string. Note that we could be dealing with ++ // weird command names, e.g. user could decide to rename java launcher ++ // to "java 1.4.2 :)", then the stat file would look like ++ // 1234 (java 1.4.2 :)) R ... ... ++ // We don't really need to know the command string, just find the last ++ // occurrence of ")" and then start parsing from there. See bug 4726580. ++ char * s = strrchr(stat, ')'); ++ ++ i = 0; ++ if (s) { ++ // Skip blank chars ++ do s++; while (isspace(*s)); ++ ++#define _UFM UINTX_FORMAT ++#define _DFM INTX_FORMAT ++ ++ /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */ ++ /* 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 */ ++ i = sscanf(s, "%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld " _UFM _UFM _DFM _UFM _UFM _UFM _UFM, ++ &state, /* 3 %c */ ++ &ppid, /* 4 %d */ ++ &pgrp, /* 5 %d */ ++ &session, /* 6 %d */ ++ &nr, /* 7 %d */ ++ &tpgrp, /* 8 %d */ ++ &flags, /* 9 %lu */ ++ &minflt, /* 10 %lu */ ++ &cminflt, /* 11 %lu */ ++ &majflt, /* 12 %lu */ ++ &cmajflt, /* 13 %lu */ ++ &utime, /* 14 %lu */ ++ &stime, /* 15 %lu */ ++ &cutime, /* 16 %ld */ ++ &cstime, /* 17 %ld */ ++ &prio, /* 18 %ld */ ++ &nice, /* 19 %ld */ ++ &junk, /* 20 %ld */ ++ &it_real, /* 21 %ld */ ++ &start, /* 22 UINTX_FORMAT */ ++ &vsize, /* 23 UINTX_FORMAT */ ++ &rss, /* 24 INTX_FORMAT */ ++ &rsslim, /* 25 UINTX_FORMAT */ ++ &scodes, /* 26 UINTX_FORMAT */ ++ &ecode, /* 27 UINTX_FORMAT */ ++ &stack_start); /* 28 UINTX_FORMAT */ ++ } ++ ++#undef _UFM ++#undef _DFM ++ ++ if (i != 28 - 2) { ++ assert(false, "Bad conversion from /proc/self/stat"); ++ // product mode - assume we are the initial thread, good luck in the ++ // embedded case. ++ warning("Can't detect initial thread stack location - bad conversion"); ++ stack_start = (uintptr_t) &rlim; ++ } ++ } else { ++ // For some reason we can't open /proc/self/stat (for example, running on ++ // FreeBSD with a Linux emulator, or inside chroot), this should work for ++ // most cases, so don't abort: ++ warning("Can't detect initial thread stack location - no /proc/self/stat"); ++ stack_start = (uintptr_t) &rlim; ++ } ++ } ++ ++ // Now we have a pointer (stack_start) very close to the stack top, the ++ // next thing to do is to figure out the exact location of stack top. We ++ // can find out the virtual memory area that contains stack_start by ++ // reading /proc/self/maps, it should be the last vma in /proc/self/maps, ++ // and its upper limit is the real stack top. (again, this would fail if ++ // running inside chroot, because /proc may not exist.) ++ ++ uintptr_t stack_top; ++ address low, high; ++ if (find_vma((address)stack_start, &low, &high)) { ++ // success, "high" is the true stack top. (ignore "low", because initial ++ // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) ++ stack_top = (uintptr_t)high; ++ } else { ++ // failed, likely because /proc/self/maps does not exist ++ warning("Can't detect initial thread stack location - find_vma failed"); ++ // best effort: stack_start is normally within a few pages below the real ++ // stack top, use it as stack top, and reduce stack size so we won't put ++ // guard page outside stack. ++ stack_top = stack_start; ++ stack_size -= 16 * page_size(); ++ } ++ ++ // stack_top could be partially down the page so align it ++ stack_top = align_size_up(stack_top, page_size()); ++ ++ if (max_size && stack_size > max_size) { ++ _initial_thread_stack_size = max_size; ++ } else { ++ _initial_thread_stack_size = stack_size; ++ } ++ ++ _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); ++ _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// time support ++ ++// Time since start-up in seconds to a fine granularity. ++// Used by VMSelfDestructTimer and the MemProfiler. ++double os::elapsedTime() { ++ ++ return (double)(os::elapsed_counter()) * 0.000001; ++} ++ ++jlong os::elapsed_counter() { ++ timeval time; ++ int status = gettimeofday(&time, NULL); ++ return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; ++} ++ ++jlong os::elapsed_frequency() { ++ return (1000 * 1000); ++} ++ ++// For now, we say that linux does not support vtime. I have no idea ++// whether it can actually be made to (DLD, 9/13/05). ++ ++bool os::supports_vtime() { return false; } ++bool os::enable_vtime() { return false; } ++bool os::vtime_enabled() { return false; } ++double os::elapsedVTime() { ++ // better than nothing, but not much ++ return elapsedTime(); ++} ++ ++jlong os::javaTimeMillis() { ++ timeval time; ++ int status = gettimeofday(&time, NULL); ++ assert(status != -1, "linux error"); ++ return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); ++} ++ ++#ifndef CLOCK_MONOTONIC ++#define CLOCK_MONOTONIC (1) ++#endif ++ ++void os::Linux::clock_init() { ++ // we do dlopen's in this particular order due to bug in linux ++ // dynamical loader (see 6348968) leading to crash on exit ++ void* handle = dlopen("librt.so.1", RTLD_LAZY); ++ if (handle == NULL) { ++ handle = dlopen("librt.so", RTLD_LAZY); ++ } ++ ++ if (handle) { ++ int (*clock_getres_func)(clockid_t, struct timespec*) = ++ (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); ++ int (*clock_gettime_func)(clockid_t, struct timespec*) = ++ (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); ++ if (clock_getres_func && clock_gettime_func) { ++ // See if monotonic clock is supported by the kernel. Note that some ++ // early implementations simply return kernel jiffies (updated every ++ // 1/100 or 1/1000 second). It would be bad to use such a low res clock ++ // for nano time (though the monotonic property is still nice to have). ++ // It's fixed in newer kernels, however clock_getres() still returns ++ // 1/HZ. We check if clock_getres() works, but will ignore its reported ++ // resolution for now. Hopefully as people move to new kernels, this ++ // won't be a problem. ++ struct timespec res; ++ struct timespec tp; ++ if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && ++ clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { ++ // yes, monotonic clock is supported ++ _clock_gettime = clock_gettime_func; ++ } else { ++ // close librt if there is no monotonic clock ++ dlclose(handle); ++ } ++ } ++ } ++} ++ ++#ifndef SYS_clock_getres ++ ++#if defined(IA32) || defined(AMD64) ++#define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229) ++#define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) ++#else ++#warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time" ++#define sys_clock_getres(x,y) -1 ++#endif ++ ++#else ++#define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) ++#endif ++ ++void os::Linux::fast_thread_clock_init() { ++ if (!UseLinuxPosixThreadCPUClocks) { ++ return; ++ } ++ clockid_t clockid; ++ struct timespec tp; ++ int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = ++ (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); ++ ++ // Switch to using fast clocks for thread cpu time if ++ // the sys_clock_getres() returns 0 error code. ++ // Note, that some kernels may support the current thread ++ // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks ++ // returned by the pthread_getcpuclockid(). ++ // If the fast Posix clocks are supported then the sys_clock_getres() ++ // must return at least tp.tv_sec == 0 which means a resolution ++ // better than 1 sec. This is extra check for reliability. ++ ++ if(pthread_getcpuclockid_func && ++ pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && ++ sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { ++ ++ _supports_fast_thread_cpu_time = true; ++ _pthread_getcpuclockid = pthread_getcpuclockid_func; ++ } ++} ++ ++jlong os::javaTimeNanos() { ++ if (Linux::supports_monotonic_clock()) { ++ struct timespec tp; ++ int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); ++ assert(status == 0, "gettime error"); ++ jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); ++ return result; ++ } else { ++ timeval time; ++ int status = gettimeofday(&time, NULL); ++ assert(status != -1, "linux error"); ++ jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); ++ return 1000 * usecs; ++ } ++} ++ ++void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { ++ if (Linux::supports_monotonic_clock()) { ++ info_ptr->max_value = ALL_64_BITS; ++ ++ // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past ++ info_ptr->may_skip_backward = false; // not subject to resetting or drifting ++ info_ptr->may_skip_forward = false; // not subject to resetting or drifting ++ } else { ++ // gettimeofday - based on time in seconds since the Epoch thus does not wrap ++ info_ptr->max_value = ALL_64_BITS; ++ ++ // gettimeofday is a real time clock so it skips ++ info_ptr->may_skip_backward = true; ++ info_ptr->may_skip_forward = true; ++ } ++ ++ info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time ++} ++ ++// Return the real, user, and system times in seconds from an ++// arbitrary fixed point in the past. ++bool os::getTimesSecs(double* process_real_time, ++ double* process_user_time, ++ double* process_system_time) { ++ struct tms ticks; ++ clock_t real_ticks = times(&ticks); ++ ++ if (real_ticks == (clock_t) (-1)) { ++ return false; ++ } else { ++ double ticks_per_second = (double) clock_tics_per_sec; ++ *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; ++ *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; ++ *process_real_time = ((double) real_ticks) / ticks_per_second; ++ ++ return true; ++ } ++} ++ ++ ++char * os::local_time_string(char *buf, size_t buflen) { ++ struct tm t; ++ time_t long_time; ++ time(&long_time); ++ localtime_r(&long_time, &t); ++ jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", ++ t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, ++ t.tm_hour, t.tm_min, t.tm_sec); ++ return buf; ++} ++ ++struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { ++ return localtime_r(clock, res); ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// runtime exit support ++ ++// Note: os::shutdown() might be called very early during initialization, or ++// called from signal handler. Before adding something to os::shutdown(), make ++// sure it is async-safe and can handle partially initialized VM. ++void os::shutdown() { ++ ++ // allow PerfMemory to attempt cleanup of any persistent resources ++ perfMemory_exit(); ++ ++ // needs to remove object in file system ++ AttachListener::abort(); ++ ++ // flush buffered output, finish log files ++ ostream_abort(); ++ ++ // Check for abort hook ++ abort_hook_t abort_hook = Arguments::abort_hook(); ++ if (abort_hook != NULL) { ++ abort_hook(); ++ } ++ ++} ++ ++// Note: os::abort() might be called very early during initialization, or ++// called from signal handler. Before adding something to os::abort(), make ++// sure it is async-safe and can handle partially initialized VM. ++void os::abort(bool dump_core) { ++ os::shutdown(); ++ if (dump_core) { ++#ifndef PRODUCT ++ fdStream out(defaultStream::output_fd()); ++ out.print_raw("Current thread is "); ++ char buf[16]; ++ jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); ++ out.print_raw_cr(buf); ++ out.print_raw_cr("Dumping core ..."); ++#endif ++ ::abort(); // dump core ++ } ++ ++ ::exit(1); ++} ++ ++// Die immediately, no exit hook, no abort hook, no cleanup. ++void os::die() { ++ // _exit() on LinuxThreads only kills current thread ++ ::abort(); ++} ++ ++// unused on linux for now. ++void os::set_error_file(const char *logfile) {} ++ ++ ++// This method is a copy of JDK's sysGetLastErrorString ++// from src/solaris/hpi/src/system_md.c ++ ++size_t os::lasterror(char *buf, size_t len) { ++ ++ if (errno == 0) return 0; ++ ++ const char *s = ::strerror(errno); ++ size_t n = ::strlen(s); ++ if (n >= len) { ++ n = len - 1; ++ } ++ ::strncpy(buf, s, n); ++ buf[n] = '\0'; ++ return n; ++} ++ ++intx os::current_thread_id() { return (intx)pthread_self(); } ++int os::current_process_id() { ++ ++ // Under the old linux thread library, linux gives each thread ++ // its own process id. Because of this each thread will return ++ // a different pid if this method were to return the result ++ // of getpid(2). Linux provides no api that returns the pid ++ // of the launcher thread for the vm. This implementation ++ // returns a unique pid, the pid of the launcher thread ++ // that starts the vm 'process'. ++ ++ // Under the NPTL, getpid() returns the same pid as the ++ // launcher thread rather than a unique pid per thread. ++ // Use gettid() if you want the old pre NPTL behaviour. ++ ++ // if you are looking for the result of a call to getpid() that ++ // returns a unique pid for the calling thread, then look at the ++ // OSThread::thread_id() method in osThread_linux.hpp file ++ ++ return (int)(_initial_pid ? _initial_pid : getpid()); ++} ++ ++// DLL functions ++ ++const char* os::dll_file_extension() { return ".so"; } ++ ++// This must be hard coded because it's the system's temporary ++// directory not the java application's temp directory, ala java.io.tmpdir. ++const char* os::get_temp_directory() { return "/tmp"; } ++ ++static bool file_exists(const char* filename) { ++ struct stat statbuf; ++ if (filename == NULL || strlen(filename) == 0) { ++ return false; ++ } ++ return os::stat(filename, &statbuf) == 0; ++} ++ ++void os::dll_build_name(char* buffer, size_t buflen, ++ const char* pname, const char* fname) { ++ // Copied from libhpi ++ const size_t pnamelen = pname ? strlen(pname) : 0; ++ ++ // Quietly truncate on buffer overflow. Should be an error. ++ if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { ++ *buffer = '\0'; ++ return; ++ } ++ ++ if (pnamelen == 0) { ++ snprintf(buffer, buflen, "lib%s.so", fname); ++ } else if (strchr(pname, *os::path_separator()) != NULL) { ++ int n; ++ char** pelements = split_path(pname, &n); ++ for (int i = 0 ; i < n ; i++) { ++ // Really shouldn't be NULL, but check can't hurt ++ if (pelements[i] == NULL || strlen(pelements[i]) == 0) { ++ continue; // skip the empty path values ++ } ++ snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); ++ if (file_exists(buffer)) { ++ break; ++ } ++ } ++ // release the storage ++ for (int i = 0 ; i < n ; i++) { ++ if (pelements[i] != NULL) { ++ FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); ++ } ++ } ++ if (pelements != NULL) { ++ FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); ++ } ++ } else { ++ snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); ++ } ++} ++ ++const char* os::get_current_directory(char *buf, int buflen) { ++ return getcwd(buf, buflen); ++} ++ ++// check if addr is inside libjvm[_g].so ++bool os::address_is_in_vm(address addr) { ++ static address libjvm_base_addr; ++ Dl_info dlinfo; ++ ++ if (libjvm_base_addr == NULL) { ++ if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { ++ libjvm_base_addr = (address)dlinfo.dli_fbase; ++ } ++ assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); ++ } ++ ++ if (dladdr((void *)addr, &dlinfo) != 0) { ++ if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; ++ } ++ ++ return false; ++} ++ ++bool os::dll_address_to_function_name(address addr, char *buf, ++ int buflen, int *offset) { ++ // buf is not optional, but offset is optional ++ assert(buf != NULL, "sanity check"); ++ ++ Dl_info dlinfo; ++ ++ if (dladdr((void*)addr, &dlinfo) != 0) { ++ // see if we have a matching symbol ++ if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { ++ if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { ++ jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); ++ } ++ if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; ++ return true; ++ } ++ // no matching symbol so try for just file info ++ if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { ++ if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), ++ buf, buflen, offset, dlinfo.dli_fname)) { ++ return true; ++ } ++ } ++ } ++ ++ buf[0] = '\0'; ++ if (offset != NULL) *offset = -1; ++ return false; ++} ++ ++struct _address_to_library_name { ++ address addr; // input : memory address ++ size_t buflen; // size of fname ++ char* fname; // output: library name ++ address base; // library base addr ++}; ++ ++static int address_to_library_name_callback(struct dl_phdr_info *info, ++ size_t size, void *data) { ++ int i; ++ bool found = false; ++ address libbase = NULL; ++ struct _address_to_library_name * d = (struct _address_to_library_name *)data; ++ ++ // iterate through all loadable segments ++ for (i = 0; i < info->dlpi_phnum; i++) { ++ address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); ++ if (info->dlpi_phdr[i].p_type == PT_LOAD) { ++ // base address of a library is the lowest address of its loaded ++ // segments. ++ if (libbase == NULL || libbase > segbase) { ++ libbase = segbase; ++ } ++ // see if 'addr' is within current segment ++ if (segbase <= d->addr && ++ d->addr < segbase + info->dlpi_phdr[i].p_memsz) { ++ found = true; ++ } ++ } ++ } ++ ++ // dlpi_name is NULL or empty if the ELF file is executable, return 0 ++ // so dll_address_to_library_name() can fall through to use dladdr() which ++ // can figure out executable name from argv[0]. ++ if (found && info->dlpi_name && info->dlpi_name[0]) { ++ d->base = libbase; ++ if (d->fname) { ++ jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); ++ } ++ return 1; ++ } ++ return 0; ++} ++ ++bool os::dll_address_to_library_name(address addr, char* buf, ++ int buflen, int* offset) { ++ // buf is not optional, but offset is optional ++ assert(buf != NULL, "sanity check"); ++ ++ Dl_info dlinfo; ++ struct _address_to_library_name data; ++ ++ // There is a bug in old glibc dladdr() implementation that it could resolve ++ // to wrong library name if the .so file has a base address != NULL. Here ++ // we iterate through the program headers of all loaded libraries to find ++ // out which library 'addr' really belongs to. This workaround can be ++ // removed once the minimum requirement for glibc is moved to 2.3.x. ++ data.addr = addr; ++ data.fname = buf; ++ data.buflen = buflen; ++ data.base = NULL; ++ int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); ++ ++ if (rslt) { ++ // buf already contains library name ++ if (offset) *offset = addr - data.base; ++ return true; ++ } ++ if (dladdr((void*)addr, &dlinfo) != 0) { ++ if (dlinfo.dli_fname != NULL) { ++ jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); ++ } ++ if (dlinfo.dli_fbase != NULL && offset != NULL) { ++ *offset = addr - (address)dlinfo.dli_fbase; ++ } ++ return true; ++ } ++ ++ buf[0] = '\0'; ++ if (offset) *offset = -1; ++ return false; ++} ++ ++ // Loads .dll/.so and ++ // in case of error it checks if .dll/.so was built for the ++ // same architecture as Hotspot is running on ++ ++ ++// Remember the stack's state. The Linux dynamic linker will change ++// the stack to 'executable' at most once, so we must safepoint only once. ++bool os::Linux::_stack_is_executable = false; ++ ++// VM operation that loads a library. This is necessary if stack protection ++// of the Java stacks can be lost during loading the library. If we ++// do not stop the Java threads, they can stack overflow before the stacks ++// are protected again. ++class VM_LinuxDllLoad: public VM_Operation { ++ private: ++ const char *_filename; ++ char *_ebuf; ++ int _ebuflen; ++ void *_lib; ++ public: ++ VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : ++ _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} ++ VMOp_Type type() const { return VMOp_LinuxDllLoad; } ++ void doit() { ++ _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); ++ os::Linux::_stack_is_executable = true; ++ } ++ void* loaded_library() { return _lib; } ++}; ++ ++void * os::dll_load(const char *filename, char *ebuf, int ebuflen) ++{ ++ void * result = NULL; ++ bool load_attempted = false; ++ ++ // Check whether the library to load might change execution rights ++ // of the stack. If they are changed, the protection of the stack ++ // guard pages will be lost. We need a safepoint to fix this. ++ // ++ // See Linux man page execstack(8) for more info. ++ if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) { ++ ElfFile ef(filename); ++ if (!ef.specifies_noexecstack()) { ++ if (!is_init_completed()) { ++ os::Linux::_stack_is_executable = true; ++ // This is OK - No Java threads have been created yet, and hence no ++ // stack guard pages to fix. ++ // ++ // This should happen only when you are building JDK7 using a very ++ // old version of JDK6 (e.g., with JPRT) and running test_gamma. ++ // ++ // Dynamic loader will make all stacks executable after ++ // this function returns, and will not do that again. ++ assert(Threads::first() == NULL, "no Java threads should exist yet."); ++ } else { ++ warning("You have loaded library %s which might have disabled stack guard. " ++ "The VM will try to fix the stack guard now.\n" ++ "It's highly recommended that you fix the library with " ++ "'execstack -c ', or link it with '-z noexecstack'.", ++ filename); ++ ++ assert(Thread::current()->is_Java_thread(), "must be Java thread"); ++ JavaThread *jt = JavaThread::current(); ++ if (jt->thread_state() != _thread_in_native) { ++ // This happens when a compiler thread tries to load a hsdis-.so file ++ // that requires ExecStack. Cannot enter safe point. Let's give up. ++ warning("Unable to fix stack guard. Giving up."); ++ } else { ++ if (!LoadExecStackDllInVMThread) { ++ // This is for the case where the DLL has an static ++ // constructor function that executes JNI code. We cannot ++ // load such DLLs in the VMThread. ++ result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); ++ } ++ ++ ThreadInVMfromNative tiv(jt); ++ debug_only(VMNativeEntryWrapper vew;) ++ ++ VM_LinuxDllLoad op(filename, ebuf, ebuflen); ++ VMThread::execute(&op); ++ if (LoadExecStackDllInVMThread) { ++ result = op.loaded_library(); ++ } ++ load_attempted = true; ++ } ++ } ++ } ++ } ++ ++ if (!load_attempted) { ++ result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); ++ } ++ ++ if (result != NULL) { ++ // Successful loading ++ return result; ++ } ++ ++ Elf32_Ehdr elf_head; ++ int diag_msg_max_length=ebuflen-strlen(ebuf); ++ char* diag_msg_buf=ebuf+strlen(ebuf); ++ ++ if (diag_msg_max_length==0) { ++ // No more space in ebuf for additional diagnostics message ++ return NULL; ++ } ++ ++ ++ int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); ++ ++ if (file_descriptor < 0) { ++ // Can't open library, report dlerror() message ++ return NULL; ++ } ++ ++ bool failed_to_read_elf_head= ++ (sizeof(elf_head)!= ++ (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; ++ ++ ::close(file_descriptor); ++ if (failed_to_read_elf_head) { ++ // file i/o error - report dlerror() msg ++ return NULL; ++ } ++ ++ typedef struct { ++ Elf32_Half code; // Actual value as defined in elf.h ++ Elf32_Half compat_class; // Compatibility of archs at VM's sense ++ char elf_class; // 32 or 64 bit ++ char endianess; // MSB or LSB ++ char* name; // String representation ++ } arch_t; ++ ++ #ifndef EM_486 ++ #define EM_486 6 /* Intel 80486 */ ++ #endif ++ ++ static const arch_t arch_array[]={ ++ {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, ++ {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, ++ {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, ++ {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, ++ {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, ++ {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, ++ {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, ++ {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, ++ {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, ++ {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, ++ {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, ++ {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, ++ {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, ++ {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, ++ {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, ++ {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"}, ++ {EM_SH, EM_SH, ELFCLASS32, ELFDATA2LSB, (char*)"SH"}, /* Support little endian only*/ ++ {EM_AARCH64, EM_AARCH64, ELFCLASS64, ELFDATA2LSB, (char*)"AARCH64"} /* Support little endian only*/ ++ }; ++ ++ #if (defined IA32) ++ static Elf32_Half running_arch_code=EM_386; ++ #elif (defined AMD64) ++ static Elf32_Half running_arch_code=EM_X86_64; ++ #elif (defined IA64) ++ static Elf32_Half running_arch_code=EM_IA_64; ++ #elif (defined __sparc) && (defined _LP64) ++ static Elf32_Half running_arch_code=EM_SPARCV9; ++ #elif (defined __sparc) && (!defined _LP64) ++ static Elf32_Half running_arch_code=EM_SPARC; ++ #elif (defined __powerpc64__) ++ static Elf32_Half running_arch_code=EM_PPC64; ++ #elif (defined __powerpc__) ++ static Elf32_Half running_arch_code=EM_PPC; ++ #elif (defined ARM) ++ static Elf32_Half running_arch_code=EM_ARM; ++ #elif (defined S390) ++ static Elf32_Half running_arch_code=EM_S390; ++ #elif (defined ALPHA) ++ static Elf32_Half running_arch_code=EM_ALPHA; ++ #elif (defined MIPSEL) ++ static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; ++ #elif (defined PARISC) ++ static Elf32_Half running_arch_code=EM_PARISC; ++ #elif (defined MIPS) ++ static Elf32_Half running_arch_code=EM_MIPS; ++ #elif (defined M68K) ++ static Elf32_Half running_arch_code=EM_68K; ++ #elif (defined SH) ++ static Elf32_Half running_arch_code=EM_SH; ++ #elif (defined AARCH64) ++ static Elf32_Half running_arch_code=EM_AARCH64; ++ #else ++ #error Method os::dll_load requires that one of following is defined:\ ++ IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K, SH ++ #endif ++ ++ // Identify compatability class for VM's architecture and library's architecture ++ // Obtain string descriptions for architectures ++ ++ arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; ++ int running_arch_index=-1; ++ ++ for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { ++ if (running_arch_code == arch_array[i].code) { ++ running_arch_index = i; ++ } ++ if (lib_arch.code == arch_array[i].code) { ++ lib_arch.compat_class = arch_array[i].compat_class; ++ lib_arch.name = arch_array[i].name; ++ } ++ } ++ ++ assert(running_arch_index != -1, ++ "Didn't find running architecture code (running_arch_code) in arch_array"); ++ if (running_arch_index == -1) { ++ // Even though running architecture detection failed ++ // we may still continue with reporting dlerror() message ++ return NULL; ++ } ++ ++ if (lib_arch.endianess != arch_array[running_arch_index].endianess) { ++ ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); ++ return NULL; ++ } ++ ++#ifndef S390 ++ if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { ++ ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); ++ return NULL; ++ } ++#endif // !S390 ++ ++ if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { ++ if ( lib_arch.name!=NULL ) { ++ ::snprintf(diag_msg_buf, diag_msg_max_length-1, ++ " (Possible cause: can't load %s-bit .so on a %s-bit platform)", ++ lib_arch.name, arch_array[running_arch_index].name); ++ } else { ++ ::snprintf(diag_msg_buf, diag_msg_max_length-1, ++ " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", ++ lib_arch.code, ++ arch_array[running_arch_index].name); ++ } ++ } ++ ++ return NULL; ++} ++ ++void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { ++ void * result = ::dlopen(filename, RTLD_LAZY); ++ if (result == NULL) { ++ ::strncpy(ebuf, ::dlerror(), ebuflen - 1); ++ ebuf[ebuflen-1] = '\0'; ++ } ++ return result; ++} ++ ++void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { ++ void * result = NULL; ++ if (LoadExecStackDllInVMThread) { ++ result = dlopen_helper(filename, ebuf, ebuflen); ++ } ++ ++ // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a ++ // library that requires an executable stack, or which does not have this ++ // stack attribute set, dlopen changes the stack attribute to executable. The ++ // read protection of the guard pages gets lost. ++ // ++ // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad ++ // may have been queued at the same time. ++ ++ if (!_stack_is_executable) { ++ JavaThread *jt = Threads::first(); ++ ++ while (jt) { ++ if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized ++ jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions ++ if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(), ++ jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) { ++ warning("Attempt to reguard stack yellow zone failed."); ++ } ++ } ++ jt = jt->next(); ++ } ++ } ++ ++ return result; ++} ++ ++/* ++ * glibc-2.0 libdl is not MT safe. If you are building with any glibc, ++ * chances are you might want to run the generated bits against glibc-2.0 ++ * libdl.so, so always use locking for any version of glibc. ++ */ ++void* os::dll_lookup(void* handle, const char* name) { ++ pthread_mutex_lock(&dl_mutex); ++ void* res = dlsym(handle, name); ++ pthread_mutex_unlock(&dl_mutex); ++ return res; ++} ++ ++ ++static bool _print_ascii_file(const char* filename, outputStream* st) { ++ int fd = ::open(filename, O_RDONLY); ++ if (fd == -1) { ++ return false; ++ } ++ ++ char buf[32]; ++ int bytes; ++ while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { ++ st->print_raw(buf, bytes); ++ } ++ ++ ::close(fd); ++ ++ return true; ++} ++ ++bool _print_lsb_file(const char* filename, outputStream* st) { ++ int fd = open(filename, O_RDONLY); ++ if (fd == -1) { ++ return false; ++ } ++ ++ char buf[512], *d_i, *d_r, *d_c; ++ int bytes; ++ ++ if ((bytes = read(fd, buf, sizeof(buf)-1)) == sizeof(buf)-1) { ++ close(fd); ++ return false; ++ } ++ close(fd); ++ ++ buf[bytes] = '\n'; ++ buf[bytes+1] = '\0'; ++ d_i = strstr(buf, "DISTRIB_ID="); ++ d_r = strstr(buf, "DISTRIB_RELEASE="); ++ d_c = strstr(buf, "DISTRIB_CODENAME="); ++ if (!d_i || !d_r || !d_c) { ++ return false; ++ } ++ d_i = strchr(d_i, '=') + 1; *strchrnul(d_i, '\n') = '\0'; ++ d_r = strchr(d_r, '=') + 1; *strchrnul(d_r, '\n') = '\0'; ++ d_c = strchr(d_c, '=') + 1; *strchrnul(d_c, '\n') = '\0'; ++ st->print("%s %s (%s)", d_i, d_r, d_c); ++ ++ return true; ++} ++ ++void os::print_dll_info(outputStream *st) { ++ st->print_cr("Dynamic libraries:"); ++ ++ char fname[32]; ++ pid_t pid = os::Linux::gettid(); ++ ++ jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); ++ ++ if (!_print_ascii_file(fname, st)) { ++ st->print("Can not get library information for pid = %d\n", pid); ++ } ++} ++ ++void os::print_os_info_brief(outputStream* st) { ++ os::Linux::print_distro_info(st); ++ ++ os::Posix::print_uname_info(st); ++ ++ os::Linux::print_libversion_info(st); ++ ++} ++ ++void os::print_os_info(outputStream* st) { ++ st->print("OS:"); ++ ++ os::Linux::print_distro_info(st); ++ ++ os::Posix::print_uname_info(st); ++ ++ // Print warning if unsafe chroot environment detected ++ if (unsafe_chroot_detected) { ++ st->print("WARNING!! "); ++ st->print_cr(unstable_chroot_error); ++ } ++ ++ os::Linux::print_libversion_info(st); ++ ++ os::Posix::print_rlimit_info(st); ++ ++ os::Posix::print_load_average(st); ++ ++ os::Linux::print_full_memory_info(st); ++} ++ ++// Try to identify popular distros. ++// Most Linux distributions have /etc/XXX-release file, which contains ++// the OS version string. Some have more than one /etc/XXX-release file ++// (e.g. Mandrake has both /etc/mandrake-release and /etc/redhat-release.), ++// so the order is important. ++void os::Linux::print_distro_info(outputStream* st) { ++ if (!_print_ascii_file("/etc/mandrake-release", st) && ++ !_print_ascii_file("/etc/sun-release", st) && ++ !_print_ascii_file("/etc/redhat-release", st) && ++ !_print_ascii_file("/etc/SuSE-release", st) && ++ !_print_ascii_file("/etc/turbolinux-release", st) && ++ !_print_ascii_file("/etc/gentoo-release", st) && ++ !_print_lsb_file("/etc/lsb-release", st) && ++ !_print_ascii_file("/etc/debian_version", st) && ++ !_print_ascii_file("/etc/ltib-release", st) && ++ !_print_ascii_file("/etc/angstrom-version", st)) { ++ st->print("Linux"); ++ } ++ st->cr(); ++} ++ ++void os::Linux::print_libversion_info(outputStream* st) { ++ // libc, pthread ++ st->print("libc:"); ++ st->print(os::Linux::glibc_version()); st->print(" "); ++ st->print(os::Linux::libpthread_version()); st->print(" "); ++ if (os::Linux::is_LinuxThreads()) { ++ st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); ++ } ++ st->cr(); ++} ++ ++void os::Linux::print_full_memory_info(outputStream* st) { ++ st->print("\n/proc/meminfo:\n"); ++ _print_ascii_file("/proc/meminfo", st); ++ st->cr(); ++} ++ ++void os::print_memory_info(outputStream* st) { ++ ++ st->print("Memory:"); ++ st->print(" %dk page", os::vm_page_size()>>10); ++ ++ // values in struct sysinfo are "unsigned long" ++ struct sysinfo si; ++ sysinfo(&si); ++ ++ st->print(", physical " UINT64_FORMAT "k", ++ os::physical_memory() >> 10); ++ st->print("(" UINT64_FORMAT "k free)", ++ os::available_memory() >> 10); ++ st->print(", swap " UINT64_FORMAT "k", ++ ((jlong)si.totalswap * si.mem_unit) >> 10); ++ st->print("(" UINT64_FORMAT "k free)", ++ ((jlong)si.freeswap * si.mem_unit) >> 10); ++ st->cr(); ++} ++ ++void os::pd_print_cpu_info(outputStream* st) { ++ st->print("\n/proc/cpuinfo:\n"); ++ if (!_print_ascii_file("/proc/cpuinfo", st)) { ++ st->print(" "); ++ } ++ st->cr(); ++} ++ ++// Taken from /usr/include/bits/siginfo.h Supposed to be architecture specific ++// but they're the same for all the linux arch that we support ++// and they're the same for solaris but there's no common place to put this. ++const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", ++ "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", ++ "ILL_COPROC", "ILL_BADSTK" }; ++ ++const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", ++ "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", ++ "FPE_FLTINV", "FPE_FLTSUB", "FPE_FLTDEN" }; ++ ++const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; ++ ++const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; ++ ++void os::print_siginfo(outputStream* st, void* siginfo) { ++ st->print("siginfo:"); ++ ++ const int buflen = 100; ++ char buf[buflen]; ++ siginfo_t *si = (siginfo_t*)siginfo; ++ st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); ++ if (si->si_errno != 0 && strerror_r(si->si_errno, buf, buflen) == 0) { ++ st->print("si_errno=%s", buf); ++ } else { ++ st->print("si_errno=%d", si->si_errno); ++ } ++ const int c = si->si_code; ++ assert(c > 0, "unexpected si_code"); ++ switch (si->si_signo) { ++ case SIGILL: ++ st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); ++ st->print(", si_addr=" PTR_FORMAT, si->si_addr); ++ break; ++ case SIGFPE: ++ st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); ++ st->print(", si_addr=" PTR_FORMAT, si->si_addr); ++ break; ++ case SIGSEGV: ++ st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); ++ st->print(", si_addr=" PTR_FORMAT, si->si_addr); ++ break; ++ case SIGBUS: ++ st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); ++ st->print(", si_addr=" PTR_FORMAT, si->si_addr); ++ break; ++ default: ++ st->print(", si_code=%d", si->si_code); ++ // no si_addr ++ } ++ ++ if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && ++ UseSharedSpaces) { ++ FileMapInfo* mapinfo = FileMapInfo::current_info(); ++ if (mapinfo->is_in_shared_space(si->si_addr)) { ++ st->print("\n\nError accessing class data sharing archive." \ ++ " Mapped file inaccessible during execution, " \ ++ " possible disk/network problem."); ++ } ++ } ++ st->cr(); ++} ++ ++ ++static void print_signal_handler(outputStream* st, int sig, ++ char* buf, size_t buflen); ++ ++void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { ++ st->print_cr("Signal Handlers:"); ++ print_signal_handler(st, SIGSEGV, buf, buflen); ++ print_signal_handler(st, SIGBUS , buf, buflen); ++ print_signal_handler(st, SIGFPE , buf, buflen); ++ print_signal_handler(st, SIGPIPE, buf, buflen); ++ print_signal_handler(st, SIGXFSZ, buf, buflen); ++ print_signal_handler(st, SIGILL , buf, buflen); ++ print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); ++ print_signal_handler(st, SR_signum, buf, buflen); ++ print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); ++ print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); ++ print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); ++ print_signal_handler(st, BREAK_SIGNAL, buf, buflen); ++} ++ ++static char saved_jvm_path[MAXPATHLEN] = {0}; ++ ++// Find the full path to the current module, libjvm.so or libjvm_g.so ++void os::jvm_path(char *buf, jint buflen) { ++ // Error checking. ++ if (buflen < MAXPATHLEN) { ++ assert(false, "must use a large-enough buffer"); ++ buf[0] = '\0'; ++ return; ++ } ++ // Lazy resolve the path to current module. ++ if (saved_jvm_path[0] != 0) { ++ strcpy(buf, saved_jvm_path); ++ return; ++ } ++ ++ char dli_fname[MAXPATHLEN]; ++ bool ret = dll_address_to_library_name( ++ CAST_FROM_FN_PTR(address, os::jvm_path), ++ dli_fname, sizeof(dli_fname), NULL); ++ assert(ret, "cannot locate libjvm"); ++ char *rp = NULL; ++ if (ret && dli_fname[0] != '\0') { ++ rp = realpath(dli_fname, buf); ++ } ++ if (rp == NULL) ++ return; ++ ++ if (Arguments::created_by_gamma_launcher()) { ++ // Support for the gamma launcher. Typical value for buf is ++ // "/jre/lib///libjvm.so". If "/jre/lib/" appears at ++ // the right place in the string, then assume we are installed in a JDK and ++ // we're done. Otherwise, check for a JAVA_HOME environment variable and fix ++ // up the path so it looks like libjvm.so is installed there (append a ++ // fake suffix hotspot/libjvm.so). ++ const char *p = buf + strlen(buf) - 1; ++ for (int count = 0; p > buf && count < 5; ++count) { ++ for (--p; p > buf && *p != '/'; --p) ++ /* empty */ ; ++ } ++ ++ if (strncmp(p, "/jre/lib/", 9) != 0) { ++ // Look for JAVA_HOME in the environment. ++ char* java_home_var = ::getenv("JAVA_HOME"); ++ if (java_home_var != NULL && java_home_var[0] != 0) { ++ char* jrelib_p; ++ int len; ++ ++ // Check the current module name "libjvm.so" or "libjvm_g.so". ++ p = strrchr(buf, '/'); ++ assert(strstr(p, "/libjvm") == p, "invalid library name"); ++ p = strstr(p, "_g") ? "_g" : ""; ++ ++ rp = realpath(java_home_var, buf); ++ if (rp == NULL) ++ return; ++ ++ // determine if this is a legacy image or modules image ++ // modules image doesn't have "jre" subdirectory ++ len = strlen(buf); ++ jrelib_p = buf + len; ++ snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); ++ if (0 != access(buf, F_OK)) { ++ snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); ++ } ++ ++ if (0 == access(buf, F_OK)) { ++ // Use current module name "libjvm[_g].so" instead of ++ // "libjvm"debug_only("_g")".so" since for fastdebug version ++ // we should have "libjvm.so" but debug_only("_g") adds "_g"! ++ len = strlen(buf); ++ snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p); ++ } else { ++ // Go back to path of .so ++ rp = realpath(dli_fname, buf); ++ if (rp == NULL) ++ return; ++ } ++ } ++ } ++ } ++ ++ strcpy(saved_jvm_path, buf); ++} ++ ++void os::print_jni_name_prefix_on(outputStream* st, int args_size) { ++ // no prefix required, not even "_" ++} ++ ++void os::print_jni_name_suffix_on(outputStream* st, int args_size) { ++ // no suffix required ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// sun.misc.Signal support ++ ++static volatile jint sigint_count = 0; ++ ++static void ++UserHandler(int sig, void *siginfo, void *context) { ++ // 4511530 - sem_post is serialized and handled by the manager thread. When ++ // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We ++ // don't want to flood the manager thread with sem_post requests. ++ if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) ++ return; ++ ++ // Ctrl-C is pressed during error reporting, likely because the error ++ // handler fails to abort. Let VM die immediately. ++ if (sig == SIGINT && is_error_reported()) { ++ os::die(); ++ } ++ ++ os::signal_notify(sig); ++} ++ ++void* os::user_handler() { ++ return CAST_FROM_FN_PTR(void*, UserHandler); ++} ++ ++class Semaphore : public StackObj { ++ public: ++ Semaphore(); ++ ~Semaphore(); ++ void signal(); ++ void wait(); ++ bool trywait(); ++ bool timedwait(unsigned int sec, int nsec); ++ private: ++ sem_t _semaphore; ++}; ++ ++ ++Semaphore::Semaphore() { ++ sem_init(&_semaphore, 0, 0); ++} ++ ++Semaphore::~Semaphore() { ++ sem_destroy(&_semaphore); ++} ++ ++void Semaphore::signal() { ++ sem_post(&_semaphore); ++} ++ ++void Semaphore::wait() { ++ sem_wait(&_semaphore); ++} ++ ++bool Semaphore::trywait() { ++ return sem_trywait(&_semaphore) == 0; ++} ++ ++bool Semaphore::timedwait(unsigned int sec, int nsec) { ++ struct timespec ts; ++ unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); ++ ++ while (1) { ++ int result = sem_timedwait(&_semaphore, &ts); ++ if (result == 0) { ++ return true; ++ } else if (errno == EINTR) { ++ continue; ++ } else if (errno == ETIMEDOUT) { ++ return false; ++ } else { ++ return false; ++ } ++ } ++} ++ ++extern "C" { ++ typedef void (*sa_handler_t)(int); ++ typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); ++} ++ ++void* os::signal(int signal_number, void* handler) { ++ struct sigaction sigAct, oldSigAct; ++ ++ sigfillset(&(sigAct.sa_mask)); ++ sigAct.sa_flags = SA_RESTART|SA_SIGINFO; ++ sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); ++ ++ if (sigaction(signal_number, &sigAct, &oldSigAct)) { ++ // -1 means registration failed ++ return (void *)-1; ++ } ++ ++ return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); ++} ++ ++void os::signal_raise(int signal_number) { ++ ::raise(signal_number); ++} ++ ++/* ++ * The following code is moved from os.cpp for making this ++ * code platform specific, which it is by its very nature. ++ */ ++ ++// Will be modified when max signal is changed to be dynamic ++int os::sigexitnum_pd() { ++ return NSIG; ++} ++ ++// a counter for each possible signal value ++static volatile jint pending_signals[NSIG+1] = { 0 }; ++ ++// Linux(POSIX) specific hand shaking semaphore. ++static sem_t sig_sem; ++static Semaphore sr_semaphore; ++ ++void os::signal_init_pd() { ++ // Initialize signal structures ++ ::memset((void*)pending_signals, 0, sizeof(pending_signals)); ++ ++ // Initialize signal semaphore ++ ::sem_init(&sig_sem, 0, 0); ++} ++ ++void os::signal_notify(int sig) { ++ Atomic::inc(&pending_signals[sig]); ++ ::sem_post(&sig_sem); ++} ++ ++static int check_pending_signals(bool wait) { ++ Atomic::store(0, &sigint_count); ++ for (;;) { ++ for (int i = 0; i < NSIG + 1; i++) { ++ jint n = pending_signals[i]; ++ if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { ++ return i; ++ } ++ } ++ if (!wait) { ++ return -1; ++ } ++ JavaThread *thread = JavaThread::current(); ++ ThreadBlockInVM tbivm(thread); ++ ++ bool threadIsSuspended; ++ do { ++ thread->set_suspend_equivalent(); ++ // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() ++ ::sem_wait(&sig_sem); ++ ++ // were we externally suspended while we were waiting? ++ threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); ++ if (threadIsSuspended) { ++ // ++ // The semaphore has been incremented, but while we were waiting ++ // another thread suspended us. We don't want to continue running ++ // while suspended because that would surprise the thread that ++ // suspended us. ++ // ++ ::sem_post(&sig_sem); ++ ++ thread->java_suspend_self(); ++ } ++ } while (threadIsSuspended); ++ } ++} ++ ++int os::signal_lookup() { ++ return check_pending_signals(false); ++} ++ ++int os::signal_wait() { ++ return check_pending_signals(true); ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// Virtual Memory ++ ++int os::vm_page_size() { ++ // Seems redundant as all get out ++ assert(os::Linux::page_size() != -1, "must call os::init"); ++ return os::Linux::page_size(); ++} ++ ++// Solaris allocates memory by pages. ++int os::vm_allocation_granularity() { ++ assert(os::Linux::page_size() != -1, "must call os::init"); ++ return os::Linux::page_size(); ++} ++ ++// Rationale behind this function: ++// current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable ++// mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get ++// samples for JITted code. Here we create private executable mapping over the code cache ++// and then we can use standard (well, almost, as mapping can change) way to provide ++// info for the reporting script by storing timestamp and location of symbol ++void linux_wrap_code(char* base, size_t size) { ++ static volatile jint cnt = 0; ++ ++ if (!UseOprofile) { ++ return; ++ } ++ ++ char buf[PATH_MAX+1]; ++ int num = Atomic::add(1, &cnt); ++ ++ snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d", ++ os::get_temp_directory(), os::current_process_id(), num); ++ unlink(buf); ++ ++ int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); ++ ++ if (fd != -1) { ++ off_t rv = ::lseek(fd, size-2, SEEK_SET); ++ if (rv != (off_t)-1) { ++ if (::write(fd, "", 1) == 1) { ++ mmap(base, size, ++ PROT_READ|PROT_WRITE|PROT_EXEC, ++ MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); ++ } ++ } ++ ::close(fd); ++ unlink(buf); ++ } ++} ++ ++static bool recoverable_mmap_error(int err) { ++ // See if the error is one we can let the caller handle. This ++ // list of errno values comes from JBS-6843484. I can't find a ++ // Linux man page that documents this specific set of errno ++ // values so while this list currently matches Solaris, it may ++ // change as we gain experience with this failure mode. ++ switch (err) { ++ case EBADF: ++ case EINVAL: ++ case ENOTSUP: ++ // let the caller deal with these errors ++ return true; ++ ++ default: ++ // Any remaining errors on this OS can cause our reserved mapping ++ // to be lost. That can cause confusion where different data ++ // structures think they have the same memory mapped. The worst ++ // scenario is if both the VM and a library think they have the ++ // same memory mapped. ++ return false; ++ } ++} ++ ++static void warn_fail_commit_memory(char* addr, size_t size, bool exec, ++ int err) { ++ warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT ++ ", %d) failed; error='%s' (errno=%d)", addr, size, exec, ++ strerror(err), err); ++} ++ ++static void warn_fail_commit_memory(char* addr, size_t size, ++ size_t alignment_hint, bool exec, ++ int err) { ++ warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT ++ ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size, ++ alignment_hint, exec, strerror(err), err); ++} ++ ++static void warn_fail_commit_memory(char* addr, size_t size, ++ size_t alignment_hint, bool exec, ++ int err, const char* msg) { ++ warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT ++ ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d); %s", addr, size, ++ alignment_hint, exec, strerror(err), err, msg); ++} ++ ++// NOTE: Linux kernel does not really reserve the pages for us. ++// All it does is to check if there are enough free pages ++// left at the time of mmap(). This could be a potential ++// problem. ++int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) { ++ int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; ++ uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, ++ MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); ++ if (res != (uintptr_t) MAP_FAILED) { ++ if (UseNUMAInterleaving) { ++ numa_make_global(addr, size); ++ } ++ return 0; ++ } ++ ++ int err = errno; // save errno from mmap() call above ++ ++ if (!recoverable_mmap_error(err)) { ++ warn_fail_commit_memory(addr, size, exec, err); ++ vm_exit_out_of_memory(size, "committing reserved memory."); ++ } ++ ++ return err; ++} ++ ++bool os::pd_commit_memory(char* addr, size_t size, bool exec) { ++ return os::Linux::commit_memory_impl(addr, size, exec) == 0; ++} ++ ++void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, ++ const char* mesg) { ++ assert(mesg != NULL, "mesg must be specified"); ++ int err = os::Linux::commit_memory_impl(addr, size, exec); ++ if (err != 0) { ++ // the caller wants all commit errors to exit with the specified mesg: ++ warn_fail_commit_memory(addr, size, exec, err); ++ vm_exit_out_of_memory(size, mesg); ++ } ++} ++ ++// Define MAP_HUGETLB here so we can build HotSpot on old systems. ++#ifndef MAP_HUGETLB ++#define MAP_HUGETLB 0x40000 ++#endif ++ ++// Define MADV_HUGEPAGE here so we can build HotSpot on old systems. ++#ifndef MADV_HUGEPAGE ++#define MADV_HUGEPAGE 14 ++#endif ++ ++volatile jint os::Linux::num_largepage_commit_fails = 0; ++ ++int os::Linux::commit_memory_impl(char* addr, size_t size, ++ size_t alignment_hint, bool exec) { ++ int err; ++ if (UseHugeTLBFS && alignment_hint > (size_t)vm_page_size()) { ++ int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; ++ uintptr_t res = ++ (uintptr_t) ::mmap(addr, size, prot, ++ MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_HUGETLB, ++ -1, 0); ++ if (res != (uintptr_t) MAP_FAILED) { ++ if (UseNUMAInterleaving) { ++ numa_make_global(addr, size); ++ } ++ return 0; ++ } ++ ++ err = errno; // save errno from mmap() call above ++ ++ if (!recoverable_mmap_error(err)) { ++ // However, it is not clear that this loss of our reserved mapping ++ // happens with large pages on Linux or that we cannot recover ++ // from the loss. For now, we just issue a warning and we don't ++ // call vm_exit_out_of_memory(). This issue is being tracked by ++ // JBS-8007074. ++ Atomic::inc(&os::Linux::num_largepage_commit_fails); ++ warn_fail_commit_memory(addr, size, alignment_hint, exec, err, ++ "Cannot allocate large pages, falling back to regular pages"); ++// vm_exit_out_of_memory(size, "committing reserved memory."); ++ } ++ // Fall through and try to use small pages ++ } ++ ++ err = os::Linux::commit_memory_impl(addr, size, exec); ++ if (err == 0) { ++ realign_memory(addr, size, alignment_hint); ++ } ++ return err; ++} ++ ++bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, ++ bool exec) { ++ return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0; ++} ++ ++void os::pd_commit_memory_or_exit(char* addr, size_t size, ++ size_t alignment_hint, bool exec, ++ const char* mesg) { ++ assert(mesg != NULL, "mesg must be specified"); ++ int err = os::Linux::commit_memory_impl(addr, size, alignment_hint, exec); ++ if (err != 0) { ++ // the caller wants all commit errors to exit with the specified mesg: ++ warn_fail_commit_memory(addr, size, alignment_hint, exec, err); ++ vm_exit_out_of_memory(size, mesg); ++ } ++} ++ ++void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { ++ if (UseHugeTLBFS && alignment_hint > (size_t)vm_page_size()) { ++ // We don't check the return value: madvise(MADV_HUGEPAGE) may not ++ // be supported or the memory may already be backed by huge pages. ++ ::madvise(addr, bytes, MADV_HUGEPAGE); ++ } ++} ++ ++void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { ++ // This method works by doing an mmap over an existing mmaping and effectively discarding ++ // the existing pages. However it won't work for SHM-based large pages that cannot be ++ // uncommitted at all. We don't do anything in this case to avoid creating a segment with ++ // small pages on top of the SHM segment. This method always works for small pages, so we ++ // allow that in any case. ++ if (alignment_hint <= (size_t)os::vm_page_size() || !UseSHM) { ++ commit_memory(addr, bytes, alignment_hint, !ExecMem); ++ } ++} ++ ++void os::numa_make_global(char *addr, size_t bytes) { ++ Linux::numa_interleave_memory(addr, bytes); ++} ++ ++void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { ++ Linux::numa_tonode_memory(addr, bytes, lgrp_hint); ++} ++ ++bool os::numa_topology_changed() { return false; } ++ ++size_t os::numa_get_groups_num() { ++ int max_node = Linux::numa_max_node(); ++ return max_node > 0 ? max_node + 1 : 1; ++} ++ ++int os::numa_get_group_id() { ++ int cpu_id = Linux::sched_getcpu(); ++ if (cpu_id != -1) { ++ int lgrp_id = Linux::get_node_by_cpu(cpu_id); ++ if (lgrp_id != -1) { ++ return lgrp_id; ++ } ++ } ++ return 0; ++} ++ ++size_t os::numa_get_leaf_groups(int *ids, size_t size) { ++ for (size_t i = 0; i < size; i++) { ++ ids[i] = i; ++ } ++ return size; ++} ++ ++bool os::get_page_info(char *start, page_info* info) { ++ return false; ++} ++ ++char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { ++ return end; ++} ++ ++ ++int os::Linux::sched_getcpu_syscall(void) { ++ unsigned int cpu; ++ int retval = -1; ++ ++#if defined(IA32) ++# ifndef SYS_getcpu ++# define SYS_getcpu 318 ++# endif ++ retval = syscall(SYS_getcpu, &cpu, NULL, NULL); ++#elif defined(AMD64) ++// Unfortunately we have to bring all these macros here from vsyscall.h ++// to be able to compile on old linuxes. ++# define __NR_vgetcpu 2 ++# define VSYSCALL_START (-10UL << 20) ++# define VSYSCALL_SIZE 1024 ++# define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) ++ typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); ++ vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); ++ retval = vgetcpu(&cpu, NULL, NULL); ++#endif ++ ++ return (retval == -1) ? retval : cpu; ++} ++ ++// Something to do with the numa-aware allocator needs these symbols ++extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } ++extern "C" JNIEXPORT void numa_error(char *where) { } ++extern "C" JNIEXPORT int fork1() { return fork(); } ++ ++ ++// If we are running with libnuma version > 2, then we should ++// be trying to use symbols with versions 1.1 ++// If we are running with earlier version, which did not have symbol versions, ++// we should use the base version. ++void* os::Linux::libnuma_dlsym(void* handle, const char *name) { ++ void *f = dlvsym(handle, name, "libnuma_1.1"); ++ if (f == NULL) { ++ f = dlsym(handle, name); ++ } ++ return f; ++} ++ ++bool os::Linux::libnuma_init() { ++ // sched_getcpu() should be in libc. ++ set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, ++ dlsym(RTLD_DEFAULT, "sched_getcpu"))); ++ ++ // If it's not, try a direct syscall. ++ if (sched_getcpu() == -1) ++ set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); ++ ++ if (sched_getcpu() != -1) { // Does it work? ++ void *handle = dlopen("libnuma.so.1", RTLD_LAZY); ++ if (handle != NULL) { ++ set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t, ++ libnuma_dlsym(handle, "numa_node_to_cpus"))); ++ set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t, ++ libnuma_dlsym(handle, "numa_max_node"))); ++ set_numa_available(CAST_TO_FN_PTR(numa_available_func_t, ++ libnuma_dlsym(handle, "numa_available"))); ++ set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t, ++ libnuma_dlsym(handle, "numa_tonode_memory"))); ++ set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t, ++ libnuma_dlsym(handle, "numa_interleave_memory"))); ++ ++ ++ if (numa_available() != -1) { ++ set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); ++ // Create a cpu -> node mapping ++ _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray(0, true); ++ rebuild_cpu_to_node_map(); ++ return true; ++ } ++ } ++ } ++ return false; ++} ++ ++// rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. ++// The table is later used in get_node_by_cpu(). ++void os::Linux::rebuild_cpu_to_node_map() { ++ const size_t NCPUS = 32768; // Since the buffer size computation is very obscure ++ // in libnuma (possible values are starting from 16, ++ // and continuing up with every other power of 2, but less ++ // than the maximum number of CPUs supported by kernel), and ++ // is a subject to change (in libnuma version 2 the requirements ++ // are more reasonable) we'll just hardcode the number they use ++ // in the library. ++ const size_t BitsPerCLong = sizeof(long) * CHAR_BIT; ++ ++ size_t cpu_num = os::active_processor_count(); ++ size_t cpu_map_size = NCPUS / BitsPerCLong; ++ size_t cpu_map_valid_size = ++ MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size); ++ ++ cpu_to_node()->clear(); ++ cpu_to_node()->at_grow(cpu_num - 1); ++ size_t node_num = numa_get_groups_num(); ++ ++ unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size, mtInternal); ++ for (size_t i = 0; i < node_num; i++) { ++ if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) { ++ for (size_t j = 0; j < cpu_map_valid_size; j++) { ++ if (cpu_map[j] != 0) { ++ for (size_t k = 0; k < BitsPerCLong; k++) { ++ if (cpu_map[j] & (1UL << k)) { ++ cpu_to_node()->at_put(j * BitsPerCLong + k, i); ++ } ++ } ++ } ++ } ++ } ++ } ++ FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); ++} ++ ++int os::Linux::get_node_by_cpu(int cpu_id) { ++ if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { ++ return cpu_to_node()->at(cpu_id); ++ } ++ return -1; ++} ++ ++GrowableArray* os::Linux::_cpu_to_node; ++os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; ++os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; ++os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; ++os::Linux::numa_available_func_t os::Linux::_numa_available; ++os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory; ++os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; ++unsigned long* os::Linux::_numa_all_nodes; ++ ++bool os::pd_uncommit_memory(char* addr, size_t size) { ++ uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, ++ MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); ++ return res != (uintptr_t) MAP_FAILED; ++} ++ ++static ++address get_stack_commited_bottom(address bottom, size_t size) { ++ address nbot = bottom; ++ address ntop = bottom + size; ++ ++ size_t page_sz = os::vm_page_size(); ++ unsigned pages = size / page_sz; ++ ++ unsigned char vec[1]; ++ unsigned imin = 1, imax = pages + 1, imid; ++ int mincore_return_value; ++ ++ while (imin < imax) { ++ imid = (imax + imin) / 2; ++ nbot = ntop - (imid * page_sz); ++ ++ // Use a trick with mincore to check whether the page is mapped or not. ++ // mincore sets vec to 1 if page resides in memory and to 0 if page ++ // is swapped output but if page we are asking for is unmapped ++ // it returns -1,ENOMEM ++ mincore_return_value = mincore(nbot, page_sz, vec); ++ ++ if (mincore_return_value == -1) { ++ // Page is not mapped go up ++ // to find first mapped page ++ if (errno != EAGAIN) { ++ assert(errno == ENOMEM, "Unexpected mincore errno"); ++ imax = imid; ++ } ++ } else { ++ // Page is mapped go down ++ // to find first not mapped page ++ imin = imid + 1; ++ } ++ } ++ ++ nbot = nbot + page_sz; ++ ++ // Adjust stack bottom one page up if last checked page is not mapped ++ if (mincore_return_value == -1) { ++ nbot = nbot + page_sz; ++ } ++ ++ return nbot; ++} ++ ++ ++// Linux uses a growable mapping for the stack, and if the mapping for ++// the stack guard pages is not removed when we detach a thread the ++// stack cannot grow beyond the pages where the stack guard was ++// mapped. If at some point later in the process the stack expands to ++// that point, the Linux kernel cannot expand the stack any further ++// because the guard pages are in the way, and a segfault occurs. ++// ++// However, it's essential not to split the stack region by unmapping ++// a region (leaving a hole) that's already part of the stack mapping, ++// so if the stack mapping has already grown beyond the guard pages at ++// the time we create them, we have to truncate the stack mapping. ++// So, we need to know the extent of the stack mapping when ++// create_stack_guard_pages() is called. ++ ++// We only need this for stacks that are growable: at the time of ++// writing thread stacks don't use growable mappings (i.e. those ++// creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this ++// only applies to the main thread. ++ ++// If the (growable) stack mapping already extends beyond the point ++// where we're going to put our guard pages, truncate the mapping at ++// that point by munmap()ping it. This ensures that when we later ++// munmap() the guard pages we don't leave a hole in the stack ++// mapping. This only affects the main/initial thread ++ ++bool os::pd_create_stack_guard_pages(char* addr, size_t size) { ++ ++ if (os::Linux::is_initial_thread()) { ++ // As we manually grow stack up to bottom inside create_attached_thread(), ++ // it's likely that os::Linux::initial_thread_stack_bottom is mapped and ++ // we don't need to do anything special. ++ // Check it first, before calling heavy function. ++ uintptr_t stack_extent = (uintptr_t) os::Linux::initial_thread_stack_bottom(); ++ unsigned char vec[1]; ++ ++ if (mincore((address)stack_extent, os::vm_page_size(), vec) == -1) { ++ // Fallback to slow path on all errors, including EAGAIN ++ stack_extent = (uintptr_t) get_stack_commited_bottom( ++ os::Linux::initial_thread_stack_bottom(), ++ (size_t)addr - stack_extent); ++ } ++ ++ if (stack_extent < (uintptr_t)addr) { ++ ::munmap((void*)stack_extent, (uintptr_t)(addr - stack_extent)); ++ } ++ } ++ ++ return os::commit_memory(addr, size, !ExecMem); ++} ++ ++// If this is a growable mapping, remove the guard pages entirely by ++// munmap()ping them. If not, just call uncommit_memory(). This only ++// affects the main/initial thread, but guard against future OS changes ++// It's safe to always unmap guard pages for initial thread because we ++// always place it right after end of the mapped region ++ ++bool os::remove_stack_guard_pages(char* addr, size_t size) { ++ uintptr_t stack_extent, stack_base; ++ ++ if (os::Linux::is_initial_thread()) { ++ return ::munmap(addr, size) == 0; ++ } ++ ++ return os::uncommit_memory(addr, size); ++} ++ ++static address _highest_vm_reserved_address = NULL; ++ ++// If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory ++// at 'requested_addr'. If there are existing memory mappings at the same ++// location, however, they will be overwritten. If 'fixed' is false, ++// 'requested_addr' is only treated as a hint, the return value may or ++// may not start from the requested address. Unlike Linux mmap(), this ++// function returns NULL to indicate failure. ++static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { ++ char * addr; ++ int flags; ++ ++ flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; ++ if (fixed) { ++ assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); ++ flags |= MAP_FIXED; ++ } ++ ++ // Map uncommitted pages PROT_READ and PROT_WRITE, change access ++ // to PROT_EXEC if executable when we commit the page. ++ addr = (char*)::mmap(requested_addr, bytes, PROT_READ|PROT_WRITE, ++ flags, -1, 0); ++ ++ if (addr != MAP_FAILED) { ++ // anon_mmap() should only get called during VM initialization, ++ // don't need lock (actually we can skip locking even it can be called ++ // from multiple threads, because _highest_vm_reserved_address is just a ++ // hint about the upper limit of non-stack memory regions.) ++ if ((address)addr + bytes > _highest_vm_reserved_address) { ++ _highest_vm_reserved_address = (address)addr + bytes; ++ } ++ } ++ ++ return addr == MAP_FAILED ? NULL : addr; ++} ++ ++// Don't update _highest_vm_reserved_address, because there might be memory ++// regions above addr + size. If so, releasing a memory region only creates ++// a hole in the address space, it doesn't help prevent heap-stack collision. ++// ++static int anon_munmap(char * addr, size_t size) { ++ return ::munmap(addr, size) == 0; ++} ++ ++char* os::pd_reserve_memory(size_t bytes, char* requested_addr, ++ size_t alignment_hint) { ++ return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); ++} ++ ++bool os::pd_release_memory(char* addr, size_t size) { ++ return anon_munmap(addr, size); ++} ++ ++static address highest_vm_reserved_address() { ++ return _highest_vm_reserved_address; ++} ++ ++static bool linux_mprotect(char* addr, size_t size, int prot) { ++ // Linux wants the mprotect address argument to be page aligned. ++ char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); ++ ++ // According to SUSv3, mprotect() should only be used with mappings ++ // established by mmap(), and mmap() always maps whole pages. Unaligned ++ // 'addr' likely indicates problem in the VM (e.g. trying to change ++ // protection of malloc'ed or statically allocated memory). Check the ++ // caller if you hit this assert. ++ assert(addr == bottom, "sanity check"); ++ ++ size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); ++ return ::mprotect(bottom, size, prot) == 0; ++} ++ ++// Set protections specified ++bool os::protect_memory(char* addr, size_t bytes, ProtType prot, ++ bool is_committed) { ++ unsigned int p = 0; ++ switch (prot) { ++ case MEM_PROT_NONE: p = PROT_NONE; break; ++ case MEM_PROT_READ: p = PROT_READ; break; ++ case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; ++ case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; ++ default: ++ ShouldNotReachHere(); ++ } ++ // is_committed is unused. ++ return linux_mprotect(addr, bytes, p); ++} ++ ++bool os::guard_memory(char* addr, size_t size) { ++ return linux_mprotect(addr, size, PROT_NONE); ++} ++ ++bool os::unguard_memory(char* addr, size_t size) { ++ return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); ++} ++ ++bool os::Linux::hugetlbfs_sanity_check(bool warn, size_t page_size) { ++ bool result = false; ++ void *p = mmap (NULL, page_size, PROT_READ|PROT_WRITE, ++ MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, ++ -1, 0); ++ ++ if (p != MAP_FAILED) { ++ // We don't know if this really is a huge page or not. ++ FILE *fp = fopen("/proc/self/maps", "r"); ++ if (fp) { ++ while (!feof(fp)) { ++ char chars[257]; ++ long x = 0; ++ if (fgets(chars, sizeof(chars), fp)) { ++ if (sscanf(chars, "%lx-%*x", &x) == 1 ++ && x == (long)p) { ++ if (strstr (chars, "hugepage")) { ++ result = true; ++ break; ++ } ++ } ++ } ++ } ++ fclose(fp); ++ } ++ munmap (p, page_size); ++ if (result) ++ return true; ++ } ++ ++ if (warn) { ++ warning("HugeTLBFS is not supported by the operating system."); ++ } ++ ++ return result; ++} ++ ++/* ++* Set the coredump_filter bits to include largepages in core dump (bit 6) ++* ++* From the coredump_filter documentation: ++* ++* - (bit 0) anonymous private memory ++* - (bit 1) anonymous shared memory ++* - (bit 2) file-backed private memory ++* - (bit 3) file-backed shared memory ++* - (bit 4) ELF header pages in file-backed private memory areas (it is ++* effective only if the bit 2 is cleared) ++* - (bit 5) hugetlb private memory ++* - (bit 6) hugetlb shared memory ++*/ ++static void set_coredump_filter(void) { ++ FILE *f; ++ long cdm; ++ ++ if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { ++ return; ++ } ++ ++ if (fscanf(f, "%lx", &cdm) != 1) { ++ fclose(f); ++ return; ++ } ++ ++ rewind(f); ++ ++ if ((cdm & LARGEPAGES_BIT) == 0) { ++ cdm |= LARGEPAGES_BIT; ++ fprintf(f, "%#lx", cdm); ++ } ++ ++ fclose(f); ++} ++ ++// Large page support ++ ++static size_t _large_page_size = 0; ++ ++void os::large_page_init() { ++ if (!UseLargePages) { ++ UseHugeTLBFS = false; ++ UseSHM = false; ++ return; ++ } ++ ++ if (FLAG_IS_DEFAULT(UseHugeTLBFS) && FLAG_IS_DEFAULT(UseSHM)) { ++ // If UseLargePages is specified on the command line try both methods, ++ // if it's default, then try only HugeTLBFS. ++ if (FLAG_IS_DEFAULT(UseLargePages)) { ++ UseHugeTLBFS = true; ++ } else { ++ UseHugeTLBFS = UseSHM = true; ++ } ++ } ++ ++ if (LargePageSizeInBytes) { ++ _large_page_size = LargePageSizeInBytes; ++ } else { ++ // large_page_size on Linux is used to round up heap size. x86 uses either ++ // 2M or 4M page, depending on whether PAE (Physical Address Extensions) ++ // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use ++ // page as large as 256M. ++ // ++ // Here we try to figure out page size by parsing /proc/meminfo and looking ++ // for a line with the following format: ++ // Hugepagesize: 2048 kB ++ // ++ // If we can't determine the value (e.g. /proc is not mounted, or the text ++ // format has been changed), we'll use the largest page size supported by ++ // the processor. ++ ++#ifndef ZERO ++ _large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M) ++ ARM_ONLY(2 * M) PPC_ONLY(4 * M); ++#endif // ZERO ++ ++ FILE *fp = fopen("/proc/meminfo", "r"); ++ if (fp) { ++ while (!feof(fp)) { ++ int x = 0; ++ char buf[16]; ++ if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { ++ if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { ++ _large_page_size = x * K; ++ break; ++ } ++ } else { ++ // skip to next line ++ for (;;) { ++ int ch = fgetc(fp); ++ if (ch == EOF || ch == (int)'\n') break; ++ } ++ } ++ } ++ fclose(fp); ++ } ++ } ++ ++ // print a warning if any large page related flag is specified on command line ++ bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); ++ ++ const size_t default_page_size = (size_t)Linux::page_size(); ++ if (_large_page_size > default_page_size) { ++ _page_sizes[0] = _large_page_size; ++ _page_sizes[1] = default_page_size; ++ _page_sizes[2] = 0; ++ } ++ UseHugeTLBFS = UseHugeTLBFS && ++ Linux::hugetlbfs_sanity_check(warn_on_failure, _large_page_size); ++ ++ if (UseHugeTLBFS) ++ UseSHM = false; ++ ++ UseLargePages = UseHugeTLBFS || UseSHM; ++ ++ set_coredump_filter(); ++} ++ ++#ifndef SHM_HUGETLB ++#define SHM_HUGETLB 04000 ++#endif ++ ++char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) { ++ // "exec" is passed in but not used. Creating the shared image for ++ // the code cache doesn't have an SHM_X executable permission to check. ++ assert(UseLargePages && UseSHM, "only for SHM large pages"); ++ ++ key_t key = IPC_PRIVATE; ++ char *addr; ++ ++ bool warn_on_failure = UseLargePages && ++ (!FLAG_IS_DEFAULT(UseLargePages) || ++ !FLAG_IS_DEFAULT(LargePageSizeInBytes) ++ ); ++ char msg[128]; ++ ++ // Create a large shared memory region to attach to based on size. ++ // Currently, size is the total size of the heap ++ int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); ++ if (shmid == -1) { ++ // Possible reasons for shmget failure: ++ // 1. shmmax is too small for Java heap. ++ // > check shmmax value: cat /proc/sys/kernel/shmmax ++ // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax ++ // 2. not enough large page memory. ++ // > check available large pages: cat /proc/meminfo ++ // > increase amount of large pages: ++ // echo new_value > /proc/sys/vm/nr_hugepages ++ // Note 1: different Linux may use different name for this property, ++ // e.g. on Redhat AS-3 it is "hugetlb_pool". ++ // Note 2: it's possible there's enough physical memory available but ++ // they are so fragmented after a long run that they can't ++ // coalesce into large pages. Try to reserve large pages when ++ // the system is still "fresh". ++ if (warn_on_failure) { ++ jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); ++ warning(msg); ++ } ++ return NULL; ++ } ++ ++ // attach to the region ++ addr = (char*)shmat(shmid, req_addr, 0); ++ int err = errno; ++ ++ // Remove shmid. If shmat() is successful, the actual shared memory segment ++ // will be deleted when it's detached by shmdt() or when the process ++ // terminates. If shmat() is not successful this will remove the shared ++ // segment immediately. ++ shmctl(shmid, IPC_RMID, NULL); ++ ++ if ((intptr_t)addr == -1) { ++ if (warn_on_failure) { ++ jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); ++ warning(msg); ++ } ++ return NULL; ++ } ++ ++ if ((addr != NULL) && UseNUMAInterleaving) { ++ numa_make_global(addr, bytes); ++ } ++ ++ // The memory is committed ++ MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, mtNone, CALLER_PC); ++ ++ return addr; ++} ++ ++bool os::release_memory_special(char* base, size_t bytes) { ++ MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); ++ // detaching the SHM segment will also delete it, see reserve_memory_special() ++ int rslt = shmdt(base); ++ if (rslt == 0) { ++ tkr.record((address)base, bytes); ++ return true; ++ } else { ++ tkr.discard(); ++ return false; ++ } ++} ++ ++size_t os::large_page_size() { ++ return _large_page_size; ++} ++ ++// HugeTLBFS allows application to commit large page memory on demand; ++// with SysV SHM the entire memory region must be allocated as shared ++// memory. ++bool os::can_commit_large_page_memory() { ++ return UseHugeTLBFS; ++} ++ ++bool os::can_execute_large_page_memory() { ++ return UseHugeTLBFS; ++} ++ ++// Reserve memory at an arbitrary address, only if that area is ++// available (and not reserved for something else). ++ ++char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { ++ const int max_tries = 10; ++ char* base[max_tries]; ++ size_t size[max_tries]; ++ const size_t gap = 0x000000; ++ ++ // Assert only that the size is a multiple of the page size, since ++ // that's all that mmap requires, and since that's all we really know ++ // about at this low abstraction level. If we need higher alignment, ++ // we can either pass an alignment to this method or verify alignment ++ // in one of the methods further up the call chain. See bug 5044738. ++ assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); ++ ++ // Repeatedly allocate blocks until the block is allocated at the ++ // right spot. Give up after max_tries. Note that reserve_memory() will ++ // automatically update _highest_vm_reserved_address if the call is ++ // successful. The variable tracks the highest memory address every reserved ++ // by JVM. It is used to detect heap-stack collision if running with ++ // fixed-stack LinuxThreads. Because here we may attempt to reserve more ++ // space than needed, it could confuse the collision detecting code. To ++ // solve the problem, save current _highest_vm_reserved_address and ++ // calculate the correct value before return. ++ address old_highest = _highest_vm_reserved_address; ++ ++ // Linux mmap allows caller to pass an address as hint; give it a try first, ++ // if kernel honors the hint then we can return immediately. ++ char * addr = anon_mmap(requested_addr, bytes, false); ++ if (addr == requested_addr) { ++ return requested_addr; ++ } ++ ++ if (addr != NULL) { ++ // mmap() is successful but it fails to reserve at the requested address ++ anon_munmap(addr, bytes); ++ } ++ ++ int i; ++ for (i = 0; i < max_tries; ++i) { ++ base[i] = reserve_memory(bytes); ++ ++ if (base[i] != NULL) { ++ // Is this the block we wanted? ++ if (base[i] == requested_addr) { ++ size[i] = bytes; ++ break; ++ } ++ ++ // Does this overlap the block we wanted? Give back the overlapped ++ // parts and try again. ++ ++ size_t top_overlap = requested_addr + (bytes + gap) - base[i]; ++ if (top_overlap >= 0 && top_overlap < bytes) { ++ unmap_memory(base[i], top_overlap); ++ base[i] += top_overlap; ++ size[i] = bytes - top_overlap; ++ } else { ++ size_t bottom_overlap = base[i] + bytes - requested_addr; ++ if (bottom_overlap >= 0 && bottom_overlap < bytes) { ++ unmap_memory(requested_addr, bottom_overlap); ++ size[i] = bytes - bottom_overlap; ++ } else { ++ size[i] = bytes; ++ } ++ } ++ } ++ } ++ ++ // Give back the unused reserved pieces. ++ ++ for (int j = 0; j < i; ++j) { ++ if (base[j] != NULL) { ++ unmap_memory(base[j], size[j]); ++ } ++ } ++ ++ if (i < max_tries) { ++ _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); ++ return requested_addr; ++ } else { ++ _highest_vm_reserved_address = old_highest; ++ return NULL; ++ } ++} ++ ++size_t os::read(int fd, void *buf, unsigned int nBytes) { ++ return ::read(fd, buf, nBytes); ++} ++ ++// TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. ++// Solaris uses poll(), linux uses park(). ++// Poll() is likely a better choice, assuming that Thread.interrupt() ++// generates a SIGUSRx signal. Note that SIGUSR1 can interfere with ++// SIGSEGV, see 4355769. ++ ++int os::sleep(Thread* thread, jlong millis, bool interruptible) { ++ assert(thread == Thread::current(), "thread consistency check"); ++ ++ ParkEvent * const slp = thread->_SleepEvent ; ++ slp->reset() ; ++ OrderAccess::fence() ; ++ ++ if (interruptible) { ++ jlong prevtime = javaTimeNanos(); ++ ++ for (;;) { ++ if (os::is_interrupted(thread, true)) { ++ return OS_INTRPT; ++ } ++ ++ jlong newtime = javaTimeNanos(); ++ ++ if (newtime - prevtime < 0) { ++ // time moving backwards, should only happen if no monotonic clock ++ // not a guarantee() because JVM should not abort on kernel/glibc bugs ++ assert(!Linux::supports_monotonic_clock(), "time moving backwards"); ++ } else { ++ millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; ++ } ++ ++ if(millis <= 0) { ++ return OS_OK; ++ } ++ ++ prevtime = newtime; ++ ++ { ++ assert(thread->is_Java_thread(), "sanity check"); ++ JavaThread *jt = (JavaThread *) thread; ++ ThreadBlockInVM tbivm(jt); ++ OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); ++ ++ jt->set_suspend_equivalent(); ++ // cleared by handle_special_suspend_equivalent_condition() or ++ // java_suspend_self() via check_and_wait_while_suspended() ++ ++ slp->park(millis); ++ ++ // were we externally suspended while we were waiting? ++ jt->check_and_wait_while_suspended(); ++ } ++ } ++ } else { ++ OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); ++ jlong prevtime = javaTimeNanos(); ++ ++ for (;;) { ++ // It'd be nice to avoid the back-to-back javaTimeNanos() calls on ++ // the 1st iteration ... ++ jlong newtime = javaTimeNanos(); ++ ++ if (newtime - prevtime < 0) { ++ // time moving backwards, should only happen if no monotonic clock ++ // not a guarantee() because JVM should not abort on kernel/glibc bugs ++ assert(!Linux::supports_monotonic_clock(), "time moving backwards"); ++ } else { ++ millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; ++ } ++ ++ if(millis <= 0) break ; ++ ++ prevtime = newtime; ++ slp->park(millis); ++ } ++ return OS_OK ; ++ } ++} ++ ++int os::naked_sleep() { ++ // %% make the sleep time an integer flag. for now use 1 millisec. ++ return os::sleep(Thread::current(), 1, false); ++} ++ ++// Sleep forever; naked call to OS-specific sleep; use with CAUTION ++void os::infinite_sleep() { ++ while (true) { // sleep forever ... ++ ::sleep(100); // ... 100 seconds at a time ++ } ++} ++ ++// Used to convert frequent JVM_Yield() to nops ++bool os::dont_yield() { ++ return DontYieldALot; ++} ++ ++void os::yield() { ++ sched_yield(); ++} ++ ++os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} ++ ++void os::yield_all(int attempts) { ++ // Yields to all threads, including threads with lower priorities ++ // Threads on Linux are all with same priority. The Solaris style ++ // os::yield_all() with nanosleep(1ms) is not necessary. ++ sched_yield(); ++} ++ ++// Called from the tight loops to possibly influence time-sharing heuristics ++void os::loop_breaker(int attempts) { ++ os::yield_all(attempts); ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// thread priority support ++ ++// Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER ++// only supports dynamic priority, static priority must be zero. For real-time ++// applications, Linux supports SCHED_RR which allows static priority (1-99). ++// However, for large multi-threaded applications, SCHED_RR is not only slower ++// than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out ++// of 5 runs - Sep 2005). ++// ++// The following code actually changes the niceness of kernel-thread/LWP. It ++// has an assumption that setpriority() only modifies one kernel-thread/LWP, ++// not the entire user process, and user level threads are 1:1 mapped to kernel ++// threads. It has always been the case, but could change in the future. For ++// this reason, the code should not be used as default (ThreadPriorityPolicy=0). ++// It is only used when ThreadPriorityPolicy=1 and requires root privilege. ++ ++int os::java_to_os_priority[CriticalPriority + 1] = { ++ 19, // 0 Entry should never be used ++ ++ 4, // 1 MinPriority ++ 3, // 2 ++ 2, // 3 ++ ++ 1, // 4 ++ 0, // 5 NormPriority ++ -1, // 6 ++ ++ -2, // 7 ++ -3, // 8 ++ -4, // 9 NearMaxPriority ++ ++ -5, // 10 MaxPriority ++ ++ -5 // 11 CriticalPriority ++}; ++ ++static int prio_init() { ++ if (ThreadPriorityPolicy == 1) { ++ // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 ++ // if effective uid is not root. Perhaps, a more elegant way of doing ++ // this is to test CAP_SYS_NICE capability, but that will require libcap.so ++ if (geteuid() != 0) { ++ if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { ++ warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); ++ } ++ ThreadPriorityPolicy = 0; ++ } ++ } ++ if (UseCriticalJavaThreadPriority) { ++ os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; ++ } ++ return 0; ++} ++ ++OSReturn os::set_native_priority(Thread* thread, int newpri) { ++ if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; ++ ++ int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); ++ return (ret == 0) ? OS_OK : OS_ERR; ++} ++ ++OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { ++ if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { ++ *priority_ptr = java_to_os_priority[NormPriority]; ++ return OS_OK; ++ } ++ ++ errno = 0; ++ *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); ++ return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); ++} ++ ++// Hint to the underlying OS that a task switch would not be good. ++// Void return because it's a hint and can fail. ++void os::hint_no_preempt() {} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// suspend/resume support ++ ++// the low-level signal-based suspend/resume support is a remnant from the ++// old VM-suspension that used to be for java-suspension, safepoints etc, ++// within hotspot. Now there is a single use-case for this: ++// - calling get_thread_pc() on the VMThread by the flat-profiler task ++// that runs in the watcher thread. ++// The remaining code is greatly simplified from the more general suspension ++// code that used to be used. ++// ++// The protocol is quite simple: ++// - suspend: ++// - sends a signal to the target thread ++// - polls the suspend state of the osthread using a yield loop ++// - target thread signal handler (SR_handler) sets suspend state ++// and blocks in sigsuspend until continued ++// - resume: ++// - sets target osthread state to continue ++// - sends signal to end the sigsuspend loop in the SR_handler ++// ++// Note that the SR_lock plays no role in this suspend/resume protocol. ++// ++ ++static void resume_clear_context(OSThread *osthread) { ++ osthread->set_ucontext(NULL); ++ osthread->set_siginfo(NULL); ++} ++ ++static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { ++ osthread->set_ucontext(context); ++ osthread->set_siginfo(siginfo); ++} ++ ++// ++// Handler function invoked when a thread's execution is suspended or ++// resumed. We have to be careful that only async-safe functions are ++// called here (Note: most pthread functions are not async safe and ++// should be avoided.) ++// ++// Note: sigwait() is a more natural fit than sigsuspend() from an ++// interface point of view, but sigwait() prevents the signal hander ++// from being run. libpthread would get very confused by not having ++// its signal handlers run and prevents sigwait()'s use with the ++// mutex granting granting signal. ++// ++// Currently only ever called on the VMThread and JavaThreads (PC sampling) ++// ++static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { ++ // Save and restore errno to avoid confusing native code with EINTR ++ // after sigsuspend. ++ int old_errno = errno; ++ ++ Thread* thread = Thread::current(); ++ OSThread* osthread = thread->osthread(); ++ assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); ++ ++ os::SuspendResume::State current = osthread->sr.state(); ++ if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { ++ suspend_save_context(osthread, siginfo, context); ++ ++ // attempt to switch the state, we assume we had a SUSPEND_REQUEST ++ os::SuspendResume::State state = osthread->sr.suspended(); ++ if (state == os::SuspendResume::SR_SUSPENDED) { ++ sigset_t suspend_set; // signals for sigsuspend() ++ ++ // get current set of blocked signals and unblock resume signal ++ pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); ++ sigdelset(&suspend_set, SR_signum); ++ ++ sr_semaphore.signal(); ++ // wait here until we are resumed ++ while (1) { ++ sigsuspend(&suspend_set); ++ ++ os::SuspendResume::State result = osthread->sr.running(); ++ if (result == os::SuspendResume::SR_RUNNING) { ++ sr_semaphore.signal(); ++ break; ++ } ++ } ++ ++ } else if (state == os::SuspendResume::SR_RUNNING) { ++ // request was cancelled, continue ++ } else { ++ ShouldNotReachHere(); ++ } ++ ++ resume_clear_context(osthread); ++ } else if (current == os::SuspendResume::SR_RUNNING) { ++ // request was cancelled, continue ++ } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { ++ // ignore ++ } else { ++ // ignore ++ } ++ ++ errno = old_errno; ++} ++ ++ ++static int SR_initialize() { ++ struct sigaction act; ++ char *s; ++ /* Get signal number to use for suspend/resume */ ++ if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { ++ int sig = ::strtol(s, 0, 10); ++ if (sig > 0 || sig < _NSIG) { ++ SR_signum = sig; ++ } ++ } ++ ++ assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, ++ "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); ++ ++ sigemptyset(&SR_sigset); ++ sigaddset(&SR_sigset, SR_signum); ++ ++ /* Set up signal handler for suspend/resume */ ++ act.sa_flags = SA_RESTART|SA_SIGINFO; ++ act.sa_handler = (void (*)(int)) SR_handler; ++ ++ // SR_signum is blocked by default. ++ // 4528190 - We also need to block pthread restart signal (32 on all ++ // supported Linux platforms). Note that LinuxThreads need to block ++ // this signal for all threads to work properly. So we don't have ++ // to use hard-coded signal number when setting up the mask. ++ pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); ++ ++ if (sigaction(SR_signum, &act, 0) == -1) { ++ return -1; ++ } ++ ++ // Save signal flag ++ os::Linux::set_our_sigflags(SR_signum, act.sa_flags); ++ return 0; ++} ++ ++static int SR_finalize() { ++ return 0; ++} ++ ++static int sr_notify(OSThread* osthread) { ++ int status = pthread_kill(osthread->pthread_id(), SR_signum); ++ assert_status(status == 0, status, "pthread_kill"); ++ return status; ++} ++ ++// "Randomly" selected value for how long we want to spin ++// before bailing out on suspending a thread, also how often ++// we send a signal to a thread we want to resume ++static const int RANDOMLY_LARGE_INTEGER = 1000000; ++static const int RANDOMLY_LARGE_INTEGER2 = 100; ++ ++// returns true on success and false on error - really an error is fatal ++// but this seems the normal response to library errors ++static bool do_suspend(OSThread* osthread) { ++ assert(osthread->sr.is_running(), "thread should be running"); ++ assert(!sr_semaphore.trywait(), "semaphore has invalid state"); ++ ++ // mark as suspended and send signal ++ if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { ++ // failed to switch, state wasn't running? ++ ShouldNotReachHere(); ++ return false; ++ } ++ ++ if (sr_notify(osthread) != 0) { ++ ShouldNotReachHere(); ++ } ++ ++ // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED ++ while (true) { ++ if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { ++ break; ++ } else { ++ // timeout ++ os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); ++ if (cancelled == os::SuspendResume::SR_RUNNING) { ++ return false; ++ } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { ++ // make sure that we consume the signal on the semaphore as well ++ sr_semaphore.wait(); ++ break; ++ } else { ++ ShouldNotReachHere(); ++ return false; ++ } ++ } ++ } ++ ++ guarantee(osthread->sr.is_suspended(), "Must be suspended"); ++ return true; ++} ++ ++static void do_resume(OSThread* osthread) { ++ assert(osthread->sr.is_suspended(), "thread should be suspended"); ++ assert(!sr_semaphore.trywait(), "invalid semaphore state"); ++ ++ if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { ++ // failed to switch to WAKEUP_REQUEST ++ ShouldNotReachHere(); ++ return; ++ } ++ ++ while (true) { ++ if (sr_notify(osthread) == 0) { ++ if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { ++ if (osthread->sr.is_running()) { ++ return; ++ } ++ } ++ } else { ++ ShouldNotReachHere(); ++ } ++ } ++ ++ guarantee(osthread->sr.is_running(), "Must be running!"); ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// interrupt support ++ ++void os::interrupt(Thread* thread) { ++ assert(Thread::current() == thread || Threads_lock->owned_by_self(), ++ "possibility of dangling Thread pointer"); ++ ++ OSThread* osthread = thread->osthread(); ++ ++ if (!osthread->interrupted()) { ++ osthread->set_interrupted(true); ++ // More than one thread can get here with the same value of osthread, ++ // resulting in multiple notifications. We do, however, want the store ++ // to interrupted() to be visible to other threads before we execute unpark(). ++ OrderAccess::fence(); ++ ParkEvent * const slp = thread->_SleepEvent ; ++ if (slp != NULL) slp->unpark() ; ++ } ++ ++ // For JSR166. Unpark even if interrupt status already was set ++ if (thread->is_Java_thread()) ++ ((JavaThread*)thread)->parker()->unpark(); ++ ++ ParkEvent * ev = thread->_ParkEvent ; ++ if (ev != NULL) ev->unpark() ; ++ ++} ++ ++bool os::is_interrupted(Thread* thread, bool clear_interrupted) { ++ assert(Thread::current() == thread || Threads_lock->owned_by_self(), ++ "possibility of dangling Thread pointer"); ++ ++ OSThread* osthread = thread->osthread(); ++ ++ bool interrupted = osthread->interrupted(); ++ ++ if (interrupted && clear_interrupted) { ++ osthread->set_interrupted(false); ++ // consider thread->_SleepEvent->reset() ... optional optimization ++ } ++ ++ return interrupted; ++} ++ ++/////////////////////////////////////////////////////////////////////////////////// ++// signal handling (except suspend/resume) ++ ++// This routine may be used by user applications as a "hook" to catch signals. ++// The user-defined signal handler must pass unrecognized signals to this ++// routine, and if it returns true (non-zero), then the signal handler must ++// return immediately. If the flag "abort_if_unrecognized" is true, then this ++// routine will never retun false (zero), but instead will execute a VM panic ++// routine kill the process. ++// ++// If this routine returns false, it is OK to call it again. This allows ++// the user-defined signal handler to perform checks either before or after ++// the VM performs its own checks. Naturally, the user code would be making ++// a serious error if it tried to handle an exception (such as a null check ++// or breakpoint) that the VM was generating for its own correct operation. ++// ++// This routine may recognize any of the following kinds of signals: ++// SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. ++// It should be consulted by handlers for any of those signals. ++// ++// The caller of this routine must pass in the three arguments supplied ++// to the function referred to in the "sa_sigaction" (not the "sa_handler") ++// field of the structure passed to sigaction(). This routine assumes that ++// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. ++// ++// Note that the VM will print warnings if it detects conflicting signal ++// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". ++// ++extern "C" JNIEXPORT int ++JVM_handle_linux_signal(int signo, siginfo_t* siginfo, ++ void* ucontext, int abort_if_unrecognized); ++ ++void signalHandler(int sig, siginfo_t* info, void* uc) { ++ assert(info != NULL && uc != NULL, "it must be old kernel"); ++ JVM_handle_linux_signal(sig, info, uc, true); ++} ++ ++ ++// This boolean allows users to forward their own non-matching signals ++// to JVM_handle_linux_signal, harmlessly. ++bool os::Linux::signal_handlers_are_installed = false; ++ ++// For signal-chaining ++struct sigaction os::Linux::sigact[MAXSIGNUM]; ++unsigned int os::Linux::sigs = 0; ++bool os::Linux::libjsig_is_loaded = false; ++typedef struct sigaction *(*get_signal_t)(int); ++get_signal_t os::Linux::get_signal_action = NULL; ++ ++struct sigaction* os::Linux::get_chained_signal_action(int sig) { ++ struct sigaction *actp = NULL; ++ ++ if (libjsig_is_loaded) { ++ // Retrieve the old signal handler from libjsig ++ actp = (*get_signal_action)(sig); ++ } ++ if (actp == NULL) { ++ // Retrieve the preinstalled signal handler from jvm ++ actp = get_preinstalled_handler(sig); ++ } ++ ++ return actp; ++} ++ ++static bool call_chained_handler(struct sigaction *actp, int sig, ++ siginfo_t *siginfo, void *context) { ++ // Call the old signal handler ++ if (actp->sa_handler == SIG_DFL) { ++ // It's more reasonable to let jvm treat it as an unexpected exception ++ // instead of taking the default action. ++ return false; ++ } else if (actp->sa_handler != SIG_IGN) { ++ if ((actp->sa_flags & SA_NODEFER) == 0) { ++ // automaticlly block the signal ++ sigaddset(&(actp->sa_mask), sig); ++ } ++ ++ sa_handler_t hand; ++ sa_sigaction_t sa; ++ bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; ++ // retrieve the chained handler ++ if (siginfo_flag_set) { ++ sa = actp->sa_sigaction; ++ } else { ++ hand = actp->sa_handler; ++ } ++ ++ if ((actp->sa_flags & SA_RESETHAND) != 0) { ++ actp->sa_handler = SIG_DFL; ++ } ++ ++ // try to honor the signal mask ++ sigset_t oset; ++ pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); ++ ++ // call into the chained handler ++ if (siginfo_flag_set) { ++ (*sa)(sig, siginfo, context); ++ } else { ++ (*hand)(sig); ++ } ++ ++ // restore the signal mask ++ pthread_sigmask(SIG_SETMASK, &oset, 0); ++ } ++ // Tell jvm's signal handler the signal is taken care of. ++ return true; ++} ++ ++bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { ++ bool chained = false; ++ // signal-chaining ++ if (UseSignalChaining) { ++ struct sigaction *actp = get_chained_signal_action(sig); ++ if (actp != NULL) { ++ chained = call_chained_handler(actp, sig, siginfo, context); ++ } ++ } ++ return chained; ++} ++ ++struct sigaction* os::Linux::get_preinstalled_handler(int sig) { ++ if ((( (unsigned int)1 << sig ) & sigs) != 0) { ++ return &sigact[sig]; ++ } ++ return NULL; ++} ++ ++void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { ++ assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); ++ sigact[sig] = oldAct; ++ sigs |= (unsigned int)1 << sig; ++} ++ ++// for diagnostic ++int os::Linux::sigflags[MAXSIGNUM]; ++ ++int os::Linux::get_our_sigflags(int sig) { ++ assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); ++ return sigflags[sig]; ++} ++ ++void os::Linux::set_our_sigflags(int sig, int flags) { ++ assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); ++ sigflags[sig] = flags; ++} ++ ++void os::Linux::set_signal_handler(int sig, bool set_installed) { ++ // Check for overwrite. ++ struct sigaction oldAct; ++ sigaction(sig, (struct sigaction*)NULL, &oldAct); ++ ++ void* oldhand = oldAct.sa_sigaction ++ ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) ++ : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); ++ if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && ++ oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && ++ oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { ++ if (AllowUserSignalHandlers || !set_installed) { ++ // Do not overwrite; user takes responsibility to forward to us. ++ return; ++ } else if (UseSignalChaining) { ++ // save the old handler in jvm ++ save_preinstalled_handler(sig, oldAct); ++ // libjsig also interposes the sigaction() call below and saves the ++ // old sigaction on it own. ++ } else { ++ fatal(err_msg("Encountered unexpected pre-existing sigaction handler " ++ "%#lx for signal %d.", (long)oldhand, sig)); ++ } ++ } ++ ++ struct sigaction sigAct; ++ sigfillset(&(sigAct.sa_mask)); ++ sigAct.sa_handler = SIG_DFL; ++ if (!set_installed) { ++ sigAct.sa_flags = SA_SIGINFO|SA_RESTART; ++ } else { ++ sigAct.sa_sigaction = signalHandler; ++ sigAct.sa_flags = SA_SIGINFO|SA_RESTART; ++ } ++ // Save flags, which are set by ours ++ assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); ++ sigflags[sig] = sigAct.sa_flags; ++ ++ int ret = sigaction(sig, &sigAct, &oldAct); ++ assert(ret == 0, "check"); ++ ++ void* oldhand2 = oldAct.sa_sigaction ++ ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) ++ : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); ++ assert(oldhand2 == oldhand, "no concurrent signal handler installation"); ++} ++ ++// install signal handlers for signals that HotSpot needs to ++// handle in order to support Java-level exception handling. ++ ++void os::Linux::install_signal_handlers() { ++ if (!signal_handlers_are_installed) { ++ signal_handlers_are_installed = true; ++ ++ // signal-chaining ++ typedef void (*signal_setting_t)(); ++ signal_setting_t begin_signal_setting = NULL; ++ signal_setting_t end_signal_setting = NULL; ++ begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, ++ dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); ++ if (begin_signal_setting != NULL) { ++ end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, ++ dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); ++ get_signal_action = CAST_TO_FN_PTR(get_signal_t, ++ dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); ++ libjsig_is_loaded = true; ++ assert(UseSignalChaining, "should enable signal-chaining"); ++ } ++ if (libjsig_is_loaded) { ++ // Tell libjsig jvm is setting signal handlers ++ (*begin_signal_setting)(); ++ } ++ ++ set_signal_handler(SIGSEGV, true); ++ set_signal_handler(SIGPIPE, true); ++ set_signal_handler(SIGBUS, true); ++ set_signal_handler(SIGILL, true); ++ set_signal_handler(SIGFPE, true); ++ set_signal_handler(SIGXFSZ, true); ++ ++ if (libjsig_is_loaded) { ++ // Tell libjsig jvm finishes setting signal handlers ++ (*end_signal_setting)(); ++ } ++ ++ // We don't activate signal checker if libjsig is in place, we trust ourselves ++ // and if UserSignalHandler is installed all bets are off. ++ // Log that signal checking is off only if -verbose:jni is specified. ++ if (CheckJNICalls) { ++ if (libjsig_is_loaded) { ++ if (PrintJNIResolving) { ++ tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); ++ } ++ check_signals = false; ++ } ++ if (AllowUserSignalHandlers) { ++ if (PrintJNIResolving) { ++ tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); ++ } ++ check_signals = false; ++ } ++ } ++ } ++} ++ ++// This is the fastest way to get thread cpu time on Linux. ++// Returns cpu time (user+sys) for any thread, not only for current. ++// POSIX compliant clocks are implemented in the kernels 2.6.16+. ++// It might work on 2.6.10+ with a special kernel/glibc patch. ++// For reference, please, see IEEE Std 1003.1-2004: ++// http://www.unix.org/single_unix_specification ++ ++jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { ++ struct timespec tp; ++ int rc = os::Linux::clock_gettime(clockid, &tp); ++ assert(rc == 0, "clock_gettime is expected to return 0 code"); ++ ++ return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; ++} ++ ++///// ++// glibc on Linux platform uses non-documented flag ++// to indicate, that some special sort of signal ++// trampoline is used. ++// We will never set this flag, and we should ++// ignore this flag in our diagnostic ++#ifdef SIGNIFICANT_SIGNAL_MASK ++#undef SIGNIFICANT_SIGNAL_MASK ++#endif ++#define SIGNIFICANT_SIGNAL_MASK (~0x04000000) ++ ++static const char* get_signal_handler_name(address handler, ++ char* buf, int buflen) { ++ int offset; ++ bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); ++ if (found) { ++ // skip directory names ++ const char *p1, *p2; ++ p1 = buf; ++ size_t len = strlen(os::file_separator()); ++ while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; ++ jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); ++ } else { ++ jio_snprintf(buf, buflen, PTR_FORMAT, handler); ++ } ++ return buf; ++} ++ ++static void print_signal_handler(outputStream* st, int sig, ++ char* buf, size_t buflen) { ++ struct sigaction sa; ++ ++ sigaction(sig, NULL, &sa); ++ ++ // See comment for SIGNIFICANT_SIGNAL_MASK define ++ sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; ++ ++ st->print("%s: ", os::exception_name(sig, buf, buflen)); ++ ++ address handler = (sa.sa_flags & SA_SIGINFO) ++ ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) ++ : CAST_FROM_FN_PTR(address, sa.sa_handler); ++ ++ if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { ++ st->print("SIG_DFL"); ++ } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { ++ st->print("SIG_IGN"); ++ } else { ++ st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); ++ } ++ ++ st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); ++ ++ address rh = VMError::get_resetted_sighandler(sig); ++ // May be, handler was resetted by VMError? ++ if(rh != NULL) { ++ handler = rh; ++ sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; ++ } ++ ++ st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); ++ ++ // Check: is it our handler? ++ if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || ++ handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { ++ // It is our signal handler ++ // check for flags, reset system-used one! ++ if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { ++ st->print( ++ ", flags was changed from " PTR32_FORMAT ", consider using jsig library", ++ os::Linux::get_our_sigflags(sig)); ++ } ++ } ++ st->cr(); ++} ++ ++ ++#define DO_SIGNAL_CHECK(sig) \ ++ if (!sigismember(&check_signal_done, sig)) \ ++ os::Linux::check_signal_handler(sig) ++ ++// This method is a periodic task to check for misbehaving JNI applications ++// under CheckJNI, we can add any periodic checks here ++ ++void os::run_periodic_checks() { ++ ++ if (check_signals == false) return; ++ ++ // SEGV and BUS if overridden could potentially prevent ++ // generation of hs*.log in the event of a crash, debugging ++ // such a case can be very challenging, so we absolutely ++ // check the following for a good measure: ++ DO_SIGNAL_CHECK(SIGSEGV); ++ DO_SIGNAL_CHECK(SIGILL); ++ DO_SIGNAL_CHECK(SIGFPE); ++ DO_SIGNAL_CHECK(SIGBUS); ++ DO_SIGNAL_CHECK(SIGPIPE); ++ DO_SIGNAL_CHECK(SIGXFSZ); ++ ++ ++ // ReduceSignalUsage allows the user to override these handlers ++ // see comments at the very top and jvm_solaris.h ++ if (!ReduceSignalUsage) { ++ DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); ++ DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); ++ DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); ++ DO_SIGNAL_CHECK(BREAK_SIGNAL); ++ } ++ ++ DO_SIGNAL_CHECK(SR_signum); ++ DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); ++} ++ ++typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); ++ ++static os_sigaction_t os_sigaction = NULL; ++ ++void os::Linux::check_signal_handler(int sig) { ++ char buf[O_BUFLEN]; ++ address jvmHandler = NULL; ++ ++ ++ struct sigaction act; ++ if (os_sigaction == NULL) { ++ // only trust the default sigaction, in case it has been interposed ++ os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); ++ if (os_sigaction == NULL) return; ++ } ++ ++ os_sigaction(sig, (struct sigaction*)NULL, &act); ++ ++ ++ act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; ++ ++ address thisHandler = (act.sa_flags & SA_SIGINFO) ++ ? CAST_FROM_FN_PTR(address, act.sa_sigaction) ++ : CAST_FROM_FN_PTR(address, act.sa_handler) ; ++ ++ ++ switch(sig) { ++ case SIGSEGV: ++ case SIGBUS: ++ case SIGFPE: ++ case SIGPIPE: ++ case SIGILL: ++ case SIGXFSZ: ++ jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); ++ break; ++ ++ case SHUTDOWN1_SIGNAL: ++ case SHUTDOWN2_SIGNAL: ++ case SHUTDOWN3_SIGNAL: ++ case BREAK_SIGNAL: ++ jvmHandler = (address)user_handler(); ++ break; ++ ++ case INTERRUPT_SIGNAL: ++ jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); ++ break; ++ ++ default: ++ if (sig == SR_signum) { ++ jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); ++ } else { ++ return; ++ } ++ break; ++ } ++ ++ if (thisHandler != jvmHandler) { ++ tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); ++ tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); ++ tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); ++ // No need to check this sig any longer ++ sigaddset(&check_signal_done, sig); ++ } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { ++ tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); ++ tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); ++ tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); ++ // No need to check this sig any longer ++ sigaddset(&check_signal_done, sig); ++ } ++ ++ // Dump all the signal ++ if (sigismember(&check_signal_done, sig)) { ++ print_signal_handlers(tty, buf, O_BUFLEN); ++ } ++} ++ ++extern void report_error(char* file_name, int line_no, char* title, char* format, ...); ++ ++extern bool signal_name(int signo, char* buf, size_t len); ++ ++const char* os::exception_name(int exception_code, char* buf, size_t size) { ++ if (0 < exception_code && exception_code <= SIGRTMAX) { ++ // signal ++ if (!signal_name(exception_code, buf, size)) { ++ jio_snprintf(buf, size, "SIG%d", exception_code); ++ } ++ return buf; ++ } else { ++ return NULL; ++ } ++} ++ ++// this is called _before_ the most of global arguments have been parsed ++void os::init(void) { ++ char dummy; /* used to get a guess on initial stack address */ ++// first_hrtime = gethrtime(); ++ ++ // With LinuxThreads the JavaMain thread pid (primordial thread) ++ // is different than the pid of the java launcher thread. ++ // So, on Linux, the launcher thread pid is passed to the VM ++ // via the sun.java.launcher.pid property. ++ // Use this property instead of getpid() if it was correctly passed. ++ // See bug 6351349. ++ pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); ++ ++ _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); ++ ++ clock_tics_per_sec = sysconf(_SC_CLK_TCK); ++ ++ init_random(1234567); ++ ++ ThreadCritical::initialize(); ++ ++ Linux::set_page_size(sysconf(_SC_PAGESIZE)); ++ if (Linux::page_size() == -1) { ++ fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", ++ strerror(errno))); ++ } ++ init_page_sizes((size_t) Linux::page_size()); ++ ++ Linux::initialize_system_info(); ++ ++ // main_thread points to the aboriginal thread ++ Linux::_main_thread = pthread_self(); ++ ++ Linux::clock_init(); ++ initial_time_count = os::elapsed_counter(); ++ pthread_mutex_init(&dl_mutex, NULL); ++ ++ // If the pagesize of the VM is greater than 8K determine the appropriate ++ // number of initial guard pages. The user can change this with the ++ // command line arguments, if needed. ++ if (vm_page_size() > (int)Linux::vm_default_page_size()) { ++ StackYellowPages = 1; ++ StackRedPages = 1; ++ StackShadowPages = round_to((StackShadowPages*Linux::vm_default_page_size()), vm_page_size()) / vm_page_size(); ++ } ++} ++ ++// To install functions for atexit system call ++extern "C" { ++ static void perfMemory_exit_helper() { ++ perfMemory_exit(); ++ } ++} ++ ++// this is called _after_ the global arguments have been parsed ++jint os::init_2(void) ++{ ++ Linux::fast_thread_clock_init(); ++ ++ // Allocate a single page and mark it as readable for safepoint polling ++ address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); ++ guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); ++ ++ os::set_polling_page( polling_page ); ++ ++#ifndef PRODUCT ++ if(Verbose && PrintMiscellaneous) ++ tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); ++#endif ++ ++ if (!UseMembar) { ++ address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); ++ guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); ++ os::set_memory_serialize_page( mem_serialize_page ); ++ ++#ifndef PRODUCT ++ if(Verbose && PrintMiscellaneous) ++ tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); ++#endif ++ } ++ ++ os::large_page_init(); ++ ++ // initialize suspend/resume support - must do this before signal_sets_init() ++ if (SR_initialize() != 0) { ++ perror("SR_initialize failed"); ++ return JNI_ERR; ++ } ++ ++ Linux::signal_sets_init(); ++ Linux::install_signal_handlers(); ++ ++ // Check minimum allowable stack size for thread creation and to initialize ++ // the java system classes, including StackOverflowError - depends on page ++ // size. Add a page for compiler2 recursion in main thread. ++ // Add in 2*BytesPerWord times page size to account for VM stack during ++ // class initialization depending on 32 or 64 bit VM. ++ os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed, ++ (size_t)(StackYellowPages+StackRedPages+StackShadowPages) * Linux::page_size() + ++ (2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::vm_default_page_size()); ++ ++ size_t threadStackSizeInBytes = ThreadStackSize * K; ++ if (threadStackSizeInBytes != 0 && ++ threadStackSizeInBytes < os::Linux::min_stack_allowed) { ++ tty->print_cr("\nThe stack size specified is too small, " ++ "Specify at least %dk", ++ os::Linux::min_stack_allowed/ K); ++ return JNI_ERR; ++ } ++ ++ // Make the stack size a multiple of the page size so that ++ // the yellow/red zones can be guarded. ++ JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, ++ vm_page_size())); ++ ++ Linux::capture_initial_stack(JavaThread::stack_size_at_create()); ++ ++ Linux::libpthread_init(); ++ if (PrintMiscellaneous && (Verbose || WizardMode)) { ++ tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", ++ Linux::glibc_version(), Linux::libpthread_version(), ++ Linux::is_floating_stack() ? "floating stack" : "fixed stack"); ++ } ++ ++ if (UseNUMA) { ++ if (!Linux::libnuma_init()) { ++ UseNUMA = false; ++ } else { ++ if ((Linux::numa_max_node() < 1)) { ++ // There's only one node(they start from 0), disable NUMA. ++ UseNUMA = false; ++ } ++ } ++ // With SHM large pages we cannot uncommit a page, so there's not way ++ // we can make the adaptive lgrp chunk resizing work. If the user specified ++ // both UseNUMA and UseLargePages (or UseSHM) on the command line - warn and ++ // disable adaptive resizing. ++ if (UseNUMA && UseLargePages && UseSHM) { ++ if (!FLAG_IS_DEFAULT(UseNUMA)) { ++ if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseSHM)) { ++ UseLargePages = false; ++ } else { ++ warning("UseNUMA is not fully compatible with SHM large pages, disabling adaptive resizing"); ++ UseAdaptiveSizePolicy = false; ++ UseAdaptiveNUMAChunkSizing = false; ++ } ++ } else { ++ UseNUMA = false; ++ } ++ } ++ if (!UseNUMA && ForceNUMA) { ++ UseNUMA = true; ++ } ++ } ++ ++ if (MaxFDLimit) { ++ // set the number of file descriptors to max. print out error ++ // if getrlimit/setrlimit fails but continue regardless. ++ struct rlimit nbr_files; ++ int status = getrlimit(RLIMIT_NOFILE, &nbr_files); ++ if (status != 0) { ++ if (PrintMiscellaneous && (Verbose || WizardMode)) ++ perror("os::init_2 getrlimit failed"); ++ } else { ++ nbr_files.rlim_cur = nbr_files.rlim_max; ++ status = setrlimit(RLIMIT_NOFILE, &nbr_files); ++ if (status != 0) { ++ if (PrintMiscellaneous && (Verbose || WizardMode)) ++ perror("os::init_2 setrlimit failed"); ++ } ++ } ++ } ++ ++ // Initialize lock used to serialize thread creation (see os::create_thread) ++ Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); ++ ++ // at-exit methods are called in the reverse order of their registration. ++ // atexit functions are called on return from main or as a result of a ++ // call to exit(3C). There can be only 32 of these functions registered ++ // and atexit() does not set errno. ++ ++ if (PerfAllowAtExitRegistration) { ++ // only register atexit functions if PerfAllowAtExitRegistration is set. ++ // atexit functions can be delayed until process exit time, which ++ // can be problematic for embedded VM situations. Embedded VMs should ++ // call DestroyJavaVM() to assure that VM resources are released. ++ ++ // note: perfMemory_exit_helper atexit function may be removed in ++ // the future if the appropriate cleanup code can be added to the ++ // VM_Exit VMOperation's doit method. ++ if (atexit(perfMemory_exit_helper) != 0) { ++ warning("os::init2 atexit(perfMemory_exit_helper) failed"); ++ } ++ } ++ ++ // initialize thread priority policy ++ prio_init(); ++ ++ return JNI_OK; ++} ++ ++// this is called at the end of vm_initialization ++void os::init_3(void) ++{ ++#ifdef JAVASE_EMBEDDED ++ // Start the MemNotifyThread ++ if (LowMemoryProtection) { ++ MemNotifyThread::start(); ++ } ++ return; ++#endif ++} ++ ++// Mark the polling page as unreadable ++void os::make_polling_page_unreadable(void) { ++ if( !guard_memory((char*)_polling_page, Linux::page_size()) ) ++ fatal("Could not disable polling page"); ++}; ++ ++// Mark the polling page as readable ++void os::make_polling_page_readable(void) { ++ if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { ++ fatal("Could not enable polling page"); ++ } ++}; ++ ++int os::active_processor_count() { ++ // Linux doesn't yet have a (official) notion of processor sets, ++ // so just return the number of online processors. ++ int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); ++ assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); ++ return online_cpus; ++} ++ ++void os::set_native_thread_name(const char *name) { ++ // Not yet implemented. ++ return; ++} ++ ++bool os::distribute_processes(uint length, uint* distribution) { ++ // Not yet implemented. ++ return false; ++} ++ ++bool os::bind_to_processor(uint processor_id) { ++ // Not yet implemented. ++ return false; ++} ++ ++/// ++ ++void os::SuspendedThreadTask::internal_do_task() { ++ if (do_suspend(_thread->osthread())) { ++ SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); ++ do_task(context); ++ do_resume(_thread->osthread()); ++ } ++} ++ ++class PcFetcher : public os::SuspendedThreadTask { ++public: ++ PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} ++ ExtendedPC result(); ++protected: ++ void do_task(const os::SuspendedThreadTaskContext& context); ++private: ++ ExtendedPC _epc; ++}; ++ ++ExtendedPC PcFetcher::result() { ++ guarantee(is_done(), "task is not done yet."); ++ return _epc; ++} ++ ++void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { ++ Thread* thread = context.thread(); ++ OSThread* osthread = thread->osthread(); ++ if (osthread->ucontext() != NULL) { ++ _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext()); ++ } else { ++ // NULL context is unexpected, double-check this is the VMThread ++ guarantee(thread->is_VM_thread(), "can only be called for VMThread"); ++ } ++} ++ ++// Suspends the target using the signal mechanism and then grabs the PC before ++// resuming the target. Used by the flat-profiler only ++ExtendedPC os::get_thread_pc(Thread* thread) { ++ // Make sure that it is called by the watcher for the VMThread ++ assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); ++ assert(thread->is_VM_thread(), "Can only be called for VMThread"); ++ ++ PcFetcher fetcher(thread); ++ fetcher.run(); ++ return fetcher.result(); ++} ++ ++int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) ++{ ++ if (is_NPTL()) { ++ return pthread_cond_timedwait(_cond, _mutex, _abstime); ++ } else { ++#ifndef IA64 ++ // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control ++ // word back to default 64bit precision if condvar is signaled. Java ++ // wants 53bit precision. Save and restore current value. ++ int fpu = get_fpu_control_word(); ++#endif // IA64 ++ int status = pthread_cond_timedwait(_cond, _mutex, _abstime); ++#ifndef IA64 ++ set_fpu_control_word(fpu); ++#endif // IA64 ++ return status; ++ } ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// debug support ++ ++static address same_page(address x, address y) { ++ int page_bits = -os::vm_page_size(); ++ if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) ++ return x; ++ else if (x > y) ++ return (address)(intptr_t(y) | ~page_bits) + 1; ++ else ++ return (address)(intptr_t(y) & page_bits); ++} ++ ++bool os::find(address addr, outputStream* st) { ++ Dl_info dlinfo; ++ memset(&dlinfo, 0, sizeof(dlinfo)); ++ if (dladdr(addr, &dlinfo) != 0) { ++ st->print(PTR_FORMAT ": ", addr); ++ if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { ++ st->print("%s+%#x", dlinfo.dli_sname, ++ addr - (intptr_t)dlinfo.dli_saddr); ++ } else if (dlinfo.dli_fbase != NULL) { ++ st->print("", addr - (intptr_t)dlinfo.dli_fbase); ++ } else { ++ st->print(""); ++ } ++ if (dlinfo.dli_fname != NULL) { ++ st->print(" in %s", dlinfo.dli_fname); ++ } ++ if (dlinfo.dli_fbase != NULL) { ++ st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); ++ } ++ st->cr(); ++ ++ if (Verbose) { ++ // decode some bytes around the PC ++ address begin = same_page(addr-40, addr); ++ address end = same_page(addr+40, addr); ++ address lowest = (address) dlinfo.dli_sname; ++ if (!lowest) lowest = (address) dlinfo.dli_fbase; ++ if (begin < lowest) begin = lowest; ++ Dl_info dlinfo2; ++ if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr ++ && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) ++ end = (address) dlinfo2.dli_saddr; ++ Disassembler::decode(begin, end, st); ++ } ++ return true; ++ } ++ return false; ++} ++ ++//////////////////////////////////////////////////////////////////////////////// ++// misc ++ ++// This does not do anything on Linux. This is basically a hook for being ++// able to use structured exception handling (thread-local exception filters) ++// on, e.g., Win32. ++void ++os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, ++ JavaCallArguments* args, Thread* thread) { ++ f(value, method, args, thread); ++} ++ ++void os::print_statistics() { ++} ++ ++int os::message_box(const char* title, const char* message) { ++ int i; ++ fdStream err(defaultStream::error_fd()); ++ for (i = 0; i < 78; i++) err.print_raw("="); ++ err.cr(); ++ err.print_raw_cr(title); ++ for (i = 0; i < 78; i++) err.print_raw("-"); ++ err.cr(); ++ err.print_raw_cr(message); ++ for (i = 0; i < 78; i++) err.print_raw("="); ++ err.cr(); ++ ++ char buf[16]; ++ // Prevent process from exiting upon "read error" without consuming all CPU ++ while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } ++ ++ return buf[0] == 'y' || buf[0] == 'Y'; ++} ++ ++int os::stat(const char *path, struct stat *sbuf) { ++ char pathbuf[MAX_PATH]; ++ if (strlen(path) > MAX_PATH - 1) { ++ errno = ENAMETOOLONG; ++ return -1; ++ } ++ os::native_path(strcpy(pathbuf, path)); ++ return ::stat(pathbuf, sbuf); ++} ++ ++bool os::check_heap(bool force) { ++ return true; ++} ++ ++int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { ++ return ::vsnprintf(buf, count, format, args); ++} ++ ++// Is a (classpath) directory empty? ++bool os::dir_is_empty(const char* path) { ++ DIR *dir = NULL; ++ struct dirent *ptr; ++ ++ dir = opendir(path); ++ if (dir == NULL) return true; ++ ++ /* Scan the directory */ ++ bool result = true; ++ char buf[sizeof(struct dirent) + MAX_PATH]; ++ while (result && (ptr = ::readdir(dir)) != NULL) { ++ if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { ++ result = false; ++ } ++ } ++ closedir(dir); ++ return result; ++} ++ ++// This code originates from JDK's sysOpen and open64_w ++// from src/solaris/hpi/src/system_md.c ++ ++#ifndef O_DELETE ++#define O_DELETE 0x10000 ++#endif ++ ++// Open a file. Unlink the file immediately after open returns ++// if the specified oflag has the O_DELETE flag set. ++// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c ++ ++int os::open(const char *path, int oflag, int mode) { ++ ++ if (strlen(path) > MAX_PATH - 1) { ++ errno = ENAMETOOLONG; ++ return -1; ++ } ++ int fd; ++ int o_delete = (oflag & O_DELETE); ++ oflag = oflag & ~O_DELETE; ++ ++ fd = ::open64(path, oflag, mode); ++ if (fd == -1) return -1; ++ ++ //If the open succeeded, the file might still be a directory ++ { ++ struct stat64 buf64; ++ int ret = ::fstat64(fd, &buf64); ++ int st_mode = buf64.st_mode; ++ ++ if (ret != -1) { ++ if ((st_mode & S_IFMT) == S_IFDIR) { ++ errno = EISDIR; ++ ::close(fd); ++ return -1; ++ } ++ } else { ++ ::close(fd); ++ return -1; ++ } ++ } ++ ++ /* ++ * All file descriptors that are opened in the JVM and not ++ * specifically destined for a subprocess should have the ++ * close-on-exec flag set. If we don't set it, then careless 3rd ++ * party native code might fork and exec without closing all ++ * appropriate file descriptors (e.g. as we do in closeDescriptors in ++ * UNIXProcess.c), and this in turn might: ++ * ++ * - cause end-of-file to fail to be detected on some file ++ * descriptors, resulting in mysterious hangs, or ++ * ++ * - might cause an fopen in the subprocess to fail on a system ++ * suffering from bug 1085341. ++ * ++ * (Yes, the default setting of the close-on-exec flag is a Unix ++ * design flaw) ++ * ++ * See: ++ * 1085341: 32-bit stdio routines should support file descriptors >255 ++ * 4843136: (process) pipe file descriptor from Runtime.exec not being closed ++ * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 ++ */ ++#ifdef FD_CLOEXEC ++ { ++ int flags = ::fcntl(fd, F_GETFD); ++ if (flags != -1) ++ ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); ++ } ++#endif ++ ++ if (o_delete != 0) { ++ ::unlink(path); ++ } ++ return fd; ++} ++ ++ ++// create binary file, rewriting existing file if required ++int os::create_binary_file(const char* path, bool rewrite_existing) { ++ int oflags = O_WRONLY | O_CREAT; ++ if (!rewrite_existing) { ++ oflags |= O_EXCL; ++ } ++ return ::open64(path, oflags, S_IREAD | S_IWRITE); ++} ++ ++// return current position of file pointer ++jlong os::current_file_offset(int fd) { ++ return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); ++} ++ ++// move file pointer to the specified offset ++jlong os::seek_to_file_offset(int fd, jlong offset) { ++ return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); ++} ++ ++// This code originates from JDK's sysAvailable ++// from src/solaris/hpi/src/native_threads/src/sys_api_td.c ++ ++int os::available(int fd, jlong *bytes) { ++ jlong cur, end; ++ int mode; ++ struct stat64 buf64; ++ ++ if (::fstat64(fd, &buf64) >= 0) { ++ mode = buf64.st_mode; ++ if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { ++ /* ++ * XXX: is the following call interruptible? If so, this might ++ * need to go through the INTERRUPT_IO() wrapper as for other ++ * blocking, interruptible calls in this file. ++ */ ++ int n; ++ if (::ioctl(fd, FIONREAD, &n) >= 0) { ++ *bytes = n; ++ return 1; ++ } ++ } ++ } ++ if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { ++ return 0; ++ } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { ++ return 0; ++ } else if (::lseek64(fd, cur, SEEK_SET) == -1) { ++ return 0; ++ } ++ *bytes = end - cur; ++ return 1; ++} ++ ++int os::socket_available(int fd, jint *pbytes) { ++ // Linux doc says EINTR not returned, unlike Solaris ++ int ret = ::ioctl(fd, FIONREAD, pbytes); ++ ++ //%% note ioctl can return 0 when successful, JVM_SocketAvailable ++ // is expected to return 0 on failure and 1 on success to the jdk. ++ return (ret < 0) ? 0 : 1; ++} ++ ++// Map a block of memory. ++char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, ++ char *addr, size_t bytes, bool read_only, ++ bool allow_exec) { ++ int prot; ++ int flags = MAP_PRIVATE; ++ ++ if (read_only) { ++ prot = PROT_READ; ++ } else { ++ prot = PROT_READ | PROT_WRITE; ++ } ++ ++ if (allow_exec) { ++ prot |= PROT_EXEC; ++ } ++ ++ if (addr != NULL) { ++ flags |= MAP_FIXED; ++ } ++ ++ char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, ++ fd, file_offset); ++ if (mapped_address == MAP_FAILED) { ++ return NULL; ++ } ++ return mapped_address; ++} ++ ++ ++// Remap a block of memory. ++char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, ++ char *addr, size_t bytes, bool read_only, ++ bool allow_exec) { ++ // same as map_memory() on this OS ++ return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, ++ allow_exec); ++} ++ ++ ++// Unmap a block of memory. ++bool os::pd_unmap_memory(char* addr, size_t bytes) { ++ return munmap(addr, bytes) == 0; ++} ++ ++static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); ++ ++static clockid_t thread_cpu_clockid(Thread* thread) { ++ pthread_t tid = thread->osthread()->pthread_id(); ++ clockid_t clockid; ++ ++ // Get thread clockid ++ int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); ++ assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); ++ return clockid; ++} ++ ++// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) ++// are used by JVM M&M and JVMTI to get user+sys or user CPU time ++// of a thread. ++// ++// current_thread_cpu_time() and thread_cpu_time(Thread*) returns ++// the fast estimate available on the platform. ++ ++jlong os::current_thread_cpu_time() { ++ if (os::Linux::supports_fast_thread_cpu_time()) { ++ return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); ++ } else { ++ // return user + sys since the cost is the same ++ return slow_thread_cpu_time(Thread::current(), true /* user + sys */); ++ } ++} ++ ++jlong os::thread_cpu_time(Thread* thread) { ++ // consistent with what current_thread_cpu_time() returns ++ if (os::Linux::supports_fast_thread_cpu_time()) { ++ return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); ++ } else { ++ return slow_thread_cpu_time(thread, true /* user + sys */); ++ } ++} ++ ++jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { ++ if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { ++ return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); ++ } else { ++ return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); ++ } ++} ++ ++jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { ++ if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { ++ return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); ++ } else { ++ return slow_thread_cpu_time(thread, user_sys_cpu_time); ++ } ++} ++ ++// ++// -1 on error. ++// ++ ++static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { ++ static bool proc_pid_cpu_avail = true; ++ static bool proc_task_unchecked = true; ++ static const char *proc_stat_path = "/proc/%d/stat"; ++ pid_t tid = thread->osthread()->thread_id(); ++ int i; ++ char *s; ++ char stat[2048]; ++ int statlen; ++ char proc_name[64]; ++ int count; ++ long sys_time, user_time; ++ char string[64]; ++ char cdummy; ++ int idummy; ++ long ldummy; ++ FILE *fp; ++ ++ // We first try accessing /proc//cpu since this is faster to ++ // process. If this file is not present (linux kernels 2.5 and above) ++ // then we open /proc//stat. ++ if ( proc_pid_cpu_avail ) { ++ sprintf(proc_name, "/proc/%d/cpu", tid); ++ fp = fopen(proc_name, "r"); ++ if ( fp != NULL ) { ++ count = fscanf( fp, "%s %lu %lu\n", string, &user_time, &sys_time); ++ fclose(fp); ++ if ( count != 3 ) return -1; ++ ++ if (user_sys_cpu_time) { ++ return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); ++ } else { ++ return (jlong)user_time * (1000000000 / clock_tics_per_sec); ++ } ++ } ++ else proc_pid_cpu_avail = false; ++ } ++ ++ // The /proc//stat aggregates per-process usage on ++ // new Linux kernels 2.6+ where NPTL is supported. ++ // The /proc/self/task//stat still has the per-thread usage. ++ // See bug 6328462. ++ // There can be no directory /proc/self/task on kernels 2.4 with NPTL ++ // and possibly in some other cases, so we check its availability. ++ if (proc_task_unchecked && os::Linux::is_NPTL()) { ++ // This is executed only once ++ proc_task_unchecked = false; ++ fp = fopen("/proc/self/task", "r"); ++ if (fp != NULL) { ++ proc_stat_path = "/proc/self/task/%d/stat"; ++ fclose(fp); ++ } ++ } ++ ++ sprintf(proc_name, proc_stat_path, tid); ++ fp = fopen(proc_name, "r"); ++ if ( fp == NULL ) return -1; ++ statlen = fread(stat, 1, 2047, fp); ++ stat[statlen] = '\0'; ++ fclose(fp); ++ ++ // Skip pid and the command string. Note that we could be dealing with ++ // weird command names, e.g. user could decide to rename java launcher ++ // to "java 1.4.2 :)", then the stat file would look like ++ // 1234 (java 1.4.2 :)) R ... ... ++ // We don't really need to know the command string, just find the last ++ // occurrence of ")" and then start parsing from there. See bug 4726580. ++ s = strrchr(stat, ')'); ++ i = 0; ++ if (s == NULL ) return -1; ++ ++ // Skip blank chars ++ do s++; while (isspace(*s)); ++ ++ count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu", ++ &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, ++ &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, ++ &user_time, &sys_time); ++ if ( count != 13 ) return -1; ++ if (user_sys_cpu_time) { ++ return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); ++ } else { ++ return (jlong)user_time * (1000000000 / clock_tics_per_sec); ++ } ++} ++ ++void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { ++ info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits ++ info_ptr->may_skip_backward = false; // elapsed time not wall time ++ info_ptr->may_skip_forward = false; // elapsed time not wall time ++ info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned ++} ++ ++void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { ++ info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits ++ info_ptr->may_skip_backward = false; // elapsed time not wall time ++ info_ptr->may_skip_forward = false; // elapsed time not wall time ++ info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned ++} ++ ++bool os::is_thread_cpu_time_supported() { ++ return true; ++} ++ ++// System loadavg support. Returns -1 if load average cannot be obtained. ++// Linux doesn't yet have a (official) notion of processor sets, ++// so just return the system wide load average. ++int os::loadavg(double loadavg[], int nelem) { ++ return ::getloadavg(loadavg, nelem); ++} ++ ++void os::pause() { ++ char filename[MAX_PATH]; ++ if (PauseAtStartupFile && PauseAtStartupFile[0]) { ++ jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); ++ } else { ++ jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); ++ } ++ ++ int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); ++ if (fd != -1) { ++ struct stat buf; ++ ::close(fd); ++ while (::stat(filename, &buf) == 0) { ++ (void)::poll(NULL, 0, 100); ++ } ++ } else { ++ jio_fprintf(stderr, ++ "Could not open pause file '%s', continuing immediately.\n", filename); ++ } ++} ++ ++ ++// Refer to the comments in os_solaris.cpp park-unpark. ++// ++// Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can ++// hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. ++// For specifics regarding the bug see GLIBC BUGID 261237 : ++// http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. ++// Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future ++// will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar ++// is used. (The simple C test-case provided in the GLIBC bug report manifests the ++// hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() ++// and monitorenter when we're using 1-0 locking. All those operations may result in ++// calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version ++// of libpthread avoids the problem, but isn't practical. ++// ++// Possible remedies: ++// ++// 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. ++// This is palliative and probabilistic, however. If the thread is preempted ++// between the call to compute_abstime() and pthread_cond_timedwait(), more ++// than the minimum period may have passed, and the abstime may be stale (in the ++// past) resultin in a hang. Using this technique reduces the odds of a hang ++// but the JVM is still vulnerable, particularly on heavily loaded systems. ++// ++// 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead ++// of the usual flag-condvar-mutex idiom. The write side of the pipe is set ++// NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) ++// reduces to poll()+read(). This works well, but consumes 2 FDs per extant ++// thread. ++// ++// 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread ++// that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing ++// a timeout request to the chron thread and then blocking via pthread_cond_wait(). ++// This also works well. In fact it avoids kernel-level scalability impediments ++// on certain platforms that don't handle lots of active pthread_cond_timedwait() ++// timers in a graceful fashion. ++// ++// 4. When the abstime value is in the past it appears that control returns ++// correctly from pthread_cond_timedwait(), but the condvar is left corrupt. ++// Subsequent timedwait/wait calls may hang indefinitely. Given that, we ++// can avoid the problem by reinitializing the condvar -- by cond_destroy() ++// followed by cond_init() -- after all calls to pthread_cond_timedwait(). ++// It may be possible to avoid reinitialization by checking the return ++// value from pthread_cond_timedwait(). In addition to reinitializing the ++// condvar we must establish the invariant that cond_signal() is only called ++// within critical sections protected by the adjunct mutex. This prevents ++// cond_signal() from "seeing" a condvar that's in the midst of being ++// reinitialized or that is corrupt. Sadly, this invariant obviates the ++// desirable signal-after-unlock optimization that avoids futile context switching. ++// ++// I'm also concerned that some versions of NTPL might allocate an auxilliary ++// structure when a condvar is used or initialized. cond_destroy() would ++// release the helper structure. Our reinitialize-after-timedwait fix ++// put excessive stress on malloc/free and locks protecting the c-heap. ++// ++// We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. ++// It may be possible to refine (4) by checking the kernel and NTPL verisons ++// and only enabling the work-around for vulnerable environments. ++ ++// utility to compute the abstime argument to timedwait: ++// millis is the relative timeout time ++// abstime will be the absolute timeout time ++// TODO: replace compute_abstime() with unpackTime() ++ ++static struct timespec* compute_abstime(timespec* abstime, jlong millis) { ++ if (millis < 0) millis = 0; ++ struct timeval now; ++ int status = gettimeofday(&now, NULL); ++ assert(status == 0, "gettimeofday"); ++ jlong seconds = millis / 1000; ++ millis %= 1000; ++ if (seconds > 50000000) { // see man cond_timedwait(3T) ++ seconds = 50000000; ++ } ++ abstime->tv_sec = now.tv_sec + seconds; ++ long usec = now.tv_usec + millis * 1000; ++ if (usec >= 1000000) { ++ abstime->tv_sec += 1; ++ usec -= 1000000; ++ } ++ abstime->tv_nsec = usec * 1000; ++ return abstime; ++} ++ ++ ++// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. ++// Conceptually TryPark() should be equivalent to park(0). ++ ++int os::PlatformEvent::TryPark() { ++ for (;;) { ++ const int v = _Event ; ++ guarantee ((v == 0) || (v == 1), "invariant") ; ++ if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; ++ } ++} ++ ++void os::PlatformEvent::park() { // AKA "down()" ++ // Invariant: Only the thread associated with the Event/PlatformEvent ++ // may call park(). ++ // TODO: assert that _Assoc != NULL or _Assoc == Self ++ int v ; ++ for (;;) { ++ v = _Event ; ++ if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; ++ } ++ guarantee (v >= 0, "invariant") ; ++ if (v == 0) { ++ // Do this the hard way by blocking ... ++ int status = pthread_mutex_lock(_mutex); ++ assert_status(status == 0, status, "mutex_lock"); ++ guarantee (_nParked == 0, "invariant") ; ++ ++ _nParked ; ++ while (_Event < 0) { ++ status = pthread_cond_wait(_cond, _mutex); ++ // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... ++ // Treat this the same as if the wait was interrupted ++ if (status == ETIME) { status = EINTR; } ++ assert_status(status == 0 || status == EINTR, status, "cond_wait"); ++ } ++ -- _nParked ; ++ ++ _Event = 0 ; ++ status = pthread_mutex_unlock(_mutex); ++ assert_status(status == 0, status, "mutex_unlock"); ++ // Paranoia to ensure our locked and lock-free paths interact ++ // correctly with each other. ++ OrderAccess::fence(); ++ } ++ guarantee (_Event >= 0, "invariant") ; ++} ++ ++int os::PlatformEvent::park(jlong millis) { ++ guarantee (_nParked == 0, "invariant") ; ++ ++ int v ; ++ for (;;) { ++ v = _Event ; ++ if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; ++ } ++ guarantee (v >= 0, "invariant") ; ++ if (v != 0) return OS_OK ; ++ ++ // We do this the hard way, by blocking the thread. ++ // Consider enforcing a minimum timeout value. ++ struct timespec abst; ++ compute_abstime(&abst, millis); ++ ++ int ret = OS_TIMEOUT; ++ int status = pthread_mutex_lock(_mutex); ++ assert_status(status == 0, status, "mutex_lock"); ++ guarantee (_nParked == 0, "invariant") ; ++ ++_nParked ; ++ ++ // Object.wait(timo) will return because of ++ // (a) notification ++ // (b) timeout ++ // (c) thread.interrupt ++ // ++ // Thread.interrupt and object.notify{All} both call Event::set. ++ // That is, we treat thread.interrupt as a special case of notification. ++ // The underlying Solaris implementation, cond_timedwait, admits ++ // spurious/premature wakeups, but the JLS/JVM spec prevents the ++ // JVM from making those visible to Java code. As such, we must ++ // filter out spurious wakeups. We assume all ETIME returns are valid. ++ // ++ // TODO: properly differentiate simultaneous notify+interrupt. ++ // In that case, we should propagate the notify to another waiter. ++ ++ while (_Event < 0) { ++ status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); ++ if (status != 0 && WorkAroundNPTLTimedWaitHang) { ++ pthread_cond_destroy (_cond); ++ pthread_cond_init (_cond, NULL) ; ++ } ++ assert_status(status == 0 || status == EINTR || ++ status == ETIME || status == ETIMEDOUT, ++ status, "cond_timedwait"); ++ if (!FilterSpuriousWakeups) break ; // previous semantics ++ if (status == ETIME || status == ETIMEDOUT) break ; ++ // We consume and ignore EINTR and spurious wakeups. ++ } ++ --_nParked ; ++ if (_Event >= 0) { ++ ret = OS_OK; ++ } ++ _Event = 0 ; ++ status = pthread_mutex_unlock(_mutex); ++ assert_status(status == 0, status, "mutex_unlock"); ++ assert (_nParked == 0, "invariant") ; ++ // Paranoia to ensure our locked and lock-free paths interact ++ // correctly with each other. ++ OrderAccess::fence(); ++ return ret; ++} ++ ++void os::PlatformEvent::unpark() { ++ // Transitions for _Event: ++ // 0 :=> 1 ++ // 1 :=> 1 ++ // -1 :=> either 0 or 1; must signal target thread ++ // That is, we can safely transition _Event from -1 to either ++ // 0 or 1. Forcing 1 is slightly more efficient for back-to-back ++ // unpark() calls. ++ // See also: "Semaphores in Plan 9" by Mullender & Cox ++ // ++ // Note: Forcing a transition from "-1" to "1" on an unpark() means ++ // that it will take two back-to-back park() calls for the owning ++ // thread to block. This has the benefit of forcing a spurious return ++ // from the first park() call after an unpark() call which will help ++ // shake out uses of park() and unpark() without condition variables. ++ ++ if (Atomic::xchg(1, &_Event) >= 0) return; ++ ++ // Wait for the thread associated with the event to vacate ++ int status = pthread_mutex_lock(_mutex); ++ assert_status(status == 0, status, "mutex_lock"); ++ int AnyWaiters = _nParked; ++ assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); ++ if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { ++ AnyWaiters = 0; ++ pthread_cond_signal(_cond); ++ } ++ status = pthread_mutex_unlock(_mutex); ++ assert_status(status == 0, status, "mutex_unlock"); ++ if (AnyWaiters != 0) { ++ status = pthread_cond_signal(_cond); ++ assert_status(status == 0, status, "cond_signal"); ++ } ++ ++ // Note that we signal() _after dropping the lock for "immortal" Events. ++ // This is safe and avoids a common class of futile wakeups. In rare ++ // circumstances this can cause a thread to return prematurely from ++ // cond_{timed}wait() but the spurious wakeup is benign and the victim will ++ // simply re-test the condition and re-park itself. ++} ++ ++ ++// JSR166 ++// ------------------------------------------------------- ++ ++/* ++ * The solaris and linux implementations of park/unpark are fairly ++ * conservative for now, but can be improved. They currently use a ++ * mutex/condvar pair, plus a a count. ++ * Park decrements count if > 0, else does a condvar wait. Unpark ++ * sets count to 1 and signals condvar. Only one thread ever waits ++ * on the condvar. Contention seen when trying to park implies that someone ++ * is unparking you, so don't wait. And spurious returns are fine, so there ++ * is no need to track notifications. ++ */ ++ ++#define MAX_SECS 100000000 ++/* ++ * This code is common to linux and solaris and will be moved to a ++ * common place in dolphin. ++ * ++ * The passed in time value is either a relative time in nanoseconds ++ * or an absolute time in milliseconds. Either way it has to be unpacked ++ * into suitable seconds and nanoseconds components and stored in the ++ * given timespec structure. ++ * Given time is a 64-bit value and the time_t used in the timespec is only ++ * a signed-32-bit value (except on 64-bit Linux) we have to watch for ++ * overflow if times way in the future are given. Further on Solaris versions ++ * prior to 10 there is a restriction (see cond_timedwait) that the specified ++ * number of seconds, in abstime, is less than current_time + 100,000,000. ++ * As it will be 28 years before "now + 100000000" will overflow we can ++ * ignore overflow and just impose a hard-limit on seconds using the value ++ * of "now + 100,000,000". This places a limit on the timeout of about 3.17 ++ * years from "now". ++ */ ++ ++static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { ++ assert (time > 0, "convertTime"); ++ ++ struct timeval now; ++ int status = gettimeofday(&now, NULL); ++ assert(status == 0, "gettimeofday"); ++ ++ time_t max_secs = now.tv_sec + MAX_SECS; ++ ++ if (isAbsolute) { ++ jlong secs = time / 1000; ++ if (secs > max_secs) { ++ absTime->tv_sec = max_secs; ++ } ++ else { ++ absTime->tv_sec = secs; ++ } ++ absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; ++ } ++ else { ++ jlong secs = time / NANOSECS_PER_SEC; ++ if (secs >= MAX_SECS) { ++ absTime->tv_sec = max_secs; ++ absTime->tv_nsec = 0; ++ } ++ else { ++ absTime->tv_sec = now.tv_sec + secs; ++ absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; ++ if (absTime->tv_nsec >= NANOSECS_PER_SEC) { ++ absTime->tv_nsec -= NANOSECS_PER_SEC; ++ ++absTime->tv_sec; // note: this must be <= max_secs ++ } ++ } ++ } ++ assert(absTime->tv_sec >= 0, "tv_sec < 0"); ++ assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); ++ assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); ++ assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); ++} ++ ++void Parker::park(bool isAbsolute, jlong time) { ++ // Ideally we'd do something useful while spinning, such ++ // as calling unpackTime(). ++ ++ // Optional fast-path check: ++ // Return immediately if a permit is available. ++ // We depend on Atomic::xchg() having full barrier semantics ++ // since we are doing a lock-free update to _counter. ++ if (Atomic::xchg(0, &_counter) > 0) return; ++ ++ Thread* thread = Thread::current(); ++ assert(thread->is_Java_thread(), "Must be JavaThread"); ++ JavaThread *jt = (JavaThread *)thread; ++ ++ // Optional optimization -- avoid state transitions if there's an interrupt pending. ++ // Check interrupt before trying to wait ++ if (Thread::is_interrupted(thread, false)) { ++ return; ++ } ++ ++ // Next, demultiplex/decode time arguments ++ timespec absTime; ++ if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all ++ return; ++ } ++ if (time > 0) { ++ unpackTime(&absTime, isAbsolute, time); ++ } ++ ++ ++ // Enter safepoint region ++ // Beware of deadlocks such as 6317397. ++ // The per-thread Parker:: mutex is a classic leaf-lock. ++ // In particular a thread must never block on the Threads_lock while ++ // holding the Parker:: mutex. If safepoints are pending both the ++ // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. ++ ThreadBlockInVM tbivm(jt); ++ ++ // Don't wait if cannot get lock since interference arises from ++ // unblocking. Also. check interrupt before trying wait ++ if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { ++ return; ++ } ++ ++ int status ; ++ if (_counter > 0) { // no wait needed ++ _counter = 0; ++ status = pthread_mutex_unlock(_mutex); ++ assert (status == 0, "invariant") ; ++ // Paranoia to ensure our locked and lock-free paths interact ++ // correctly with each other and Java-level accesses. ++ OrderAccess::fence(); ++ return; ++ } ++ ++#ifdef ASSERT ++ // Don't catch signals while blocked; let the running threads have the signals. ++ // (This allows a debugger to break into the running thread.) ++ sigset_t oldsigs; ++ sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); ++ pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); ++#endif ++ ++ OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); ++ jt->set_suspend_equivalent(); ++ // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() ++ ++ if (time == 0) { ++ status = pthread_cond_wait (_cond, _mutex) ; ++ } else { ++ status = os::Linux::safe_cond_timedwait (_cond, _mutex, &absTime) ; ++ if (status != 0 && WorkAroundNPTLTimedWaitHang) { ++ pthread_cond_destroy (_cond) ; ++ pthread_cond_init (_cond, NULL); ++ } ++ } ++ assert_status(status == 0 || status == EINTR || ++ status == ETIME || status == ETIMEDOUT, ++ status, "cond_timedwait"); ++ ++#ifdef ASSERT ++ pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); ++#endif ++ ++ _counter = 0 ; ++ status = pthread_mutex_unlock(_mutex) ; ++ assert_status(status == 0, status, "invariant") ; ++ // Paranoia to ensure our locked and lock-free paths interact ++ // correctly with each other and Java-level accesses. ++ OrderAccess::fence(); ++ ++ // If externally suspended while waiting, re-suspend ++ if (jt->handle_special_suspend_equivalent_condition()) { ++ jt->java_suspend_self(); ++ } ++} ++ ++void Parker::unpark() { ++ int s, status ; ++ status = pthread_mutex_lock(_mutex); ++ assert (status == 0, "invariant") ; ++ s = _counter; ++ _counter = 1; ++ if (s < 1) { ++ if (WorkAroundNPTLTimedWaitHang) { ++ status = pthread_cond_signal (_cond) ; ++ assert (status == 0, "invariant") ; ++ status = pthread_mutex_unlock(_mutex); ++ assert (status == 0, "invariant") ; ++ } else { ++ status = pthread_mutex_unlock(_mutex); ++ assert (status == 0, "invariant") ; ++ status = pthread_cond_signal (_cond) ; ++ assert (status == 0, "invariant") ; ++ } ++ } else { ++ pthread_mutex_unlock(_mutex); ++ assert (status == 0, "invariant") ; ++ } ++} ++ ++ ++extern char** environ; ++ ++// Run the specified command in a separate process. Return its exit value, ++// or -1 on failure (e.g. can't fork a new process). ++// Unlike system(), this function can be called from signal handler. It ++// doesn't block SIGINT et al. ++int os::fork_and_exec(char* cmd) { ++ const char * argv[4] = {"sh", "-c", cmd, NULL}; ++ ++ // fork() in LinuxThreads/NPTL is not async-safe. It needs to run ++ // pthread_atfork handlers and reset pthread library. All we need is a ++ // separate process to execve. Make a direct syscall to fork process. ++ // On IA64 there's no fork syscall, we have to use fork() and hope for ++ // the best... ++ pid_t pid = NOT_IA64(NOT_AARCH64(syscall(SYS_fork);)) ++ IA64_ONLY(fork();) ++ AARCH64_ONLY(vfork();) ++ ++ if (pid < 0) { ++ // fork failed ++ return -1; ++ ++ } else if (pid == 0) { ++ // child process ++ ++ // execve() in LinuxThreads will call pthread_kill_other_threads_np() ++ // first to kill every thread on the thread list. Because this list is ++ // not reset by fork() (see notes above), execve() will instead kill ++ // every thread in the parent process. We know this is the only thread ++ // in the new process, so make a system call directly. ++ // IA64 should use normal execve() from glibc to match the glibc fork() ++ // above. ++ NOT_IA64(syscall(SYS_execve, "/bin/sh", argv, environ);) ++ IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);) ++ ++ // execve failed ++ _exit(-1); ++ ++ } else { ++ // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't ++ // care about the actual exit code, for now. ++ ++ int status; ++ ++ // Wait for the child process to exit. This returns immediately if ++ // the child has already exited. */ ++ while (waitpid(pid, &status, 0) < 0) { ++ switch (errno) { ++ case ECHILD: return 0; ++ case EINTR: break; ++ default: return -1; ++ } ++ } ++ ++ if (WIFEXITED(status)) { ++ // The child exited normally; get its exit code. ++ return WEXITSTATUS(status); ++ } else if (WIFSIGNALED(status)) { ++ // The child exited because of a signal ++ // The best value to return is 0x80 + signal number, ++ // because that is what all Unix shells do, and because ++ // it allows callers to distinguish between process exit and ++ // process death by signal. ++ return 0x80 + WTERMSIG(status); ++ } else { ++ // Unknown exit code; pass it through ++ return status; ++ } ++ } ++} ++ ++// is_headless_jre() ++// ++// Test for the existence of xawt/libmawt.so or libawt_xawt.so ++// in order to report if we are running in a headless jre ++// ++// Since JDK8 xawt/libmawt.so was moved into the same directory ++// as libawt.so, and renamed libawt_xawt.so ++// ++bool os::is_headless_jre() { ++ struct stat statbuf; ++ char buf[MAXPATHLEN]; ++ char libmawtpath[MAXPATHLEN]; ++ const char *xawtstr = "/xawt/libmawt.so"; ++ const char *new_xawtstr = "/libawt_xawt.so"; ++ char *p; ++ ++ // Get path to libjvm.so ++ os::jvm_path(buf, sizeof(buf)); ++ ++ // Get rid of libjvm.so ++ p = strrchr(buf, '/'); ++ if (p == NULL) return false; ++ else *p = '\0'; ++ ++ // Get rid of client or server ++ p = strrchr(buf, '/'); ++ if (p == NULL) return false; ++ else *p = '\0'; ++ ++ // check xawt/libmawt.so ++ strcpy(libmawtpath, buf); ++ strcat(libmawtpath, xawtstr); ++ if (::stat(libmawtpath, &statbuf) == 0) return false; ++ ++ // check libawt_xawt.so ++ strcpy(libmawtpath, buf); ++ strcat(libmawtpath, new_xawtstr); ++ if (::stat(libmawtpath, &statbuf) == 0) return false; ++ ++ return true; ++} ++ ++// Get the default path to the core file ++// Returns the length of the string ++int os::get_core_path(char* buffer, size_t bufferSize) { ++ const char* p = get_current_directory(buffer, bufferSize); ++ ++ if (p == NULL) { ++ assert(p != NULL, "failed to get current directory"); ++ return 0; ++ } ++ ++ return strlen(buffer); ++} ++ ++#ifdef JAVASE_EMBEDDED ++// ++// A thread to watch the '/dev/mem_notify' device, which will tell us when the OS is running low on memory. ++// ++MemNotifyThread* MemNotifyThread::_memnotify_thread = NULL; ++ ++// ctor ++// ++MemNotifyThread::MemNotifyThread(int fd): Thread() { ++ assert(memnotify_thread() == NULL, "we can only allocate one MemNotifyThread"); ++ _fd = fd; ++ ++ if (os::create_thread(this, os::os_thread)) { ++ _memnotify_thread = this; ++ os::set_priority(this, NearMaxPriority); ++ os::start_thread(this); ++ } ++} ++ ++// Where all the work gets done ++// ++void MemNotifyThread::run() { ++ assert(this == memnotify_thread(), "expected the singleton MemNotifyThread"); ++ ++ // Set up the select arguments ++ fd_set rfds; ++ if (_fd != -1) { ++ FD_ZERO(&rfds); ++ FD_SET(_fd, &rfds); ++ } ++ ++ // Now wait for the mem_notify device to wake up ++ while (1) { ++ // Wait for the mem_notify device to signal us.. ++ int rc = select(_fd+1, _fd != -1 ? &rfds : NULL, NULL, NULL, NULL); ++ if (rc == -1) { ++ perror("select!\n"); ++ break; ++ } else if (rc) { ++ //ssize_t free_before = os::available_memory(); ++ //tty->print ("Notified: Free: %dK \n",os::available_memory()/1024); ++ ++ // The kernel is telling us there is not much memory left... ++ // try to do something about that ++ ++ // If we are not already in a GC, try one. ++ if (!Universe::heap()->is_gc_active()) { ++ Universe::heap()->collect(GCCause::_allocation_failure); ++ ++ //ssize_t free_after = os::available_memory(); ++ //tty->print ("Post-Notify: Free: %dK\n",free_after/1024); ++ //tty->print ("GC freed: %dK\n", (free_after - free_before)/1024); ++ } ++ // We might want to do something like the following if we find the GC's are not helping... ++ // Universe::heap()->size_policy()->set_gc_time_limit_exceeded(true); ++ } ++ } ++} ++ ++// ++// See if the /dev/mem_notify device exists, and if so, start a thread to monitor it. ++// ++void MemNotifyThread::start() { ++ int fd; ++ fd = open ("/dev/mem_notify", O_RDONLY, 0); ++ if (fd < 0) { ++ return; ++ } ++ ++ if (memnotify_thread() == NULL) { ++ new MemNotifyThread(fd); ++ } ++} ++ ++#endif // JAVASE_EMBEDDED +diff -Nur openjdk.orig/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp +--- openjdk.orig/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp 2014-02-20 19:51:45.000000000 +0100 ++++ openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp 2014-05-13 16:14:56.641091455 +0200 +@@ -253,7 +253,7 @@ + #elif defined(__APPLE__) + inline int g_isnan(double f) { return isnan(f); } + #elif defined(LINUX) || defined(_ALLBSD_SOURCE) +-inline int g_isnan(float f) { return isnanf(f); } ++inline int g_isnan(float f) { return __isnanf(f); } + inline int g_isnan(double f) { return isnan(f); } + #else + #error "missing platform-specific definition here" +@@ -267,8 +267,8 @@ + + // Checking for finiteness + +-inline int g_isfinite(jfloat f) { return finite(f); } +-inline int g_isfinite(jdouble f) { return finite(f); } ++inline int g_isfinite(jfloat f) { return isfinite(f); } ++inline int g_isfinite(jdouble f) { return isfinite(f); } + + + // Wide characters +diff -Nur openjdk.orig/jdk/make/com/sun/java/pack/Makefile openjdk/jdk/make/com/sun/java/pack/Makefile +--- openjdk.orig/jdk/make/com/sun/java/pack/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/com/sun/java/pack/Makefile 2014-05-13 16:14:56.641091455 +0200 +@@ -79,7 +79,7 @@ + OTHER_CXXFLAGS += $(ZLIB_CFLAGS) -DSYSTEM_ZLIB + endif + else +- OTHER_CXXFLAGS += -DNO_ZLIB -DUNPACK_JNI ++ CXXFLAGS_COMMON += -DNO_ZLIB -DUNPACK_JNI + OTHER_LDLIBS += $(JVMLIB) + endif + +diff -Nur openjdk.orig/jdk/make/com/sun/nio/sctp/Makefile openjdk/jdk/make/com/sun/nio/sctp/Makefile +--- openjdk.orig/jdk/make/com/sun/nio/sctp/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/com/sun/nio/sctp/Makefile 2014-05-13 16:14:56.641091455 +0200 +@@ -64,7 +64,7 @@ + COMPILER_WARNINGS_FATAL=true + endif + #OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -ljava -lnet -lpthread -ldl +-OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -lnio -lnet -lpthread -ldl ++OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -lnio -ljavanet -lpthread -ldl + endif + ifeq ($(PLATFORM), solaris) + #LIBSCTP = -lsctp +diff -Nur openjdk.orig/jdk/make/common/Defs.gmk openjdk/jdk/make/common/Defs.gmk +--- openjdk.orig/jdk/make/common/Defs.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/common/Defs.gmk 2014-05-13 16:14:56.641091455 +0200 +@@ -204,7 +204,7 @@ + ifeq ($(PLATFORM), macosx) + FREETYPE_HEADERS_PATH = /usr/X11R6/include + else +- FREETYPE_HEADERS_PATH = /usr/include ++ FREETYPE_HEADERS_PATH = /usr/include/disabled + endif + endif + endif +diff -Nur openjdk.orig/jdk/make/common/Sanity.gmk openjdk/jdk/make/common/Sanity.gmk +--- openjdk.orig/jdk/make/common/Sanity.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/common/Sanity.gmk 2014-05-13 16:14:56.641091455 +0200 +@@ -91,8 +91,7 @@ + sane-ld_run_path \ + sane-alt_bootdir \ + sane-bootdir \ +- sane-local-bootdir \ +- sane-alsa-headers ++ sane-local-bootdir + + ifdef OPENJDK + sanity-all:: sane-freetype +diff -Nur openjdk.orig/jdk/make/common/shared/Platform.gmk openjdk/jdk/make/common/shared/Platform.gmk +--- openjdk.orig/jdk/make/common/shared/Platform.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/common/shared/Platform.gmk 2014-05-13 16:14:56.641091455 +0200 +@@ -160,9 +160,6 @@ + else + mach := $(shell uname -m) + endif +- ifneq (,$(wildcard /usr/bin/dpkg-architecture)) +- mach := $(shell (dpkg-architecture -qDEB_HOST_ARCH_CPU 2>/dev/null || echo $(mach)) | sed 's/arm64/aarch64/;s/powerpc$$/ppc/;s/hppa/parisc/;s/ppc64el/ppc64le/') +- endif + archExpr = case "$(mach)" in \ + i[3-9]86) \ + echo i586 \ +diff -Nur openjdk.orig/jdk/make/common/shared/Sanity.gmk openjdk/jdk/make/common/shared/Sanity.gmk +--- openjdk.orig/jdk/make/common/shared/Sanity.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/common/shared/Sanity.gmk 2014-05-13 16:14:56.641091455 +0200 +@@ -114,11 +114,6 @@ + elif [ -f /etc/lsb-release ] ; then \ + $(EGREP) DISTRIB_RELEASE /etc/lsb-release | $(SED) -e 's@.*DISTRIB_RELEASE=\(.*\)@\1@'; \ + fi) +- ALSA_INCLUDE=/usr/include/alsa/version.h +- ALSA_LIBRARY=/usr/lib/libasound.so +- _ALSA_VERSION := $(shell $(EGREP) SND_LIB_VERSION_STR $(ALSA_INCLUDE) | \ +- $(SED) -e 's@.*"\(.*\)".*@\1@' ) +- ALSA_VERSION := $(call GetVersion,$(_ALSA_VERSION)) + endif + + ifeq ($(PLATFORM), macosx) +@@ -225,7 +220,6 @@ + sane-compiler \ + sane-link \ + sane-cacerts \ +- sane-alsa-headers \ + sane-ant_version \ + sane-zip_version \ + sane-unzip_version \ +@@ -1381,34 +1375,6 @@ + endif + endif + +-###################################################### +-# Check that ALSA headers and libs are installed and +-# that the header has the right version. We only +-# need /usr/include/alsa/version.h and /usr/lib/libasound.so +-###################################################### +- +-ifdef REQUIRED_ALSA_VERSION +- ALSA_CHECK := $(call CheckVersions,$(ALSA_VERSION),$(REQUIRED_ALSA_VERSION)) +-endif +-sane-alsa-headers: +-ifdef REQUIRED_ALSA_VERSION +- @if [ "$(ALSA_CHECK)" != "missing" ] ; then \ +- if [ "$(ALSA_CHECK)" != "same" -a "$(ALSA_CHECK)" != "newer" ] ; then \ +- $(ECHO) "ERROR: The ALSA version must be $(REQUIRED_ALSA_VERSION) or higher. \n" \ +- " You have the following ALSA version installed: $${alsa_version} \n" \ +- " Please reinstall ALSA (drivers and lib). You can download \n" \ +- " the source distribution from http://www.alsa-project.org \n" \ +- " or go to http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \ +- "" >> $(ERROR_FILE) ; \ +- fi ; \ +- else \ +- $(ECHO) "ERROR: You seem to not have installed ALSA $(REQUIRED_ALSA_VERSION) or higher. \n" \ +- " Please install ALSA (drivers and lib). You can download the \n" \ +- " source distribution from http://www.alsa-project.org or go to \n" \ +- " http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \ +- "" >> $(ERROR_FILE) ; \ +- fi +-endif + + # If a sanity file doesn't exist, just make sure it's dir exists + $(SANITY_FILES): +diff -Nur openjdk.orig/jdk/make/java/instrument/Makefile openjdk/jdk/make/java/instrument/Makefile +--- openjdk.orig/jdk/make/java/instrument/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/java/instrument/Makefile 2014-05-13 16:14:56.641091455 +0200 +@@ -140,6 +140,8 @@ + # We don't want to link against -ljava + JAVALIB= + ++OTHER_LDLIBS += -liconv ++ + # + # Add to ambient vpath so we pick up the library files + # +diff -Nur openjdk.orig/jdk/make/java/net/Makefile openjdk/jdk/make/java/net/Makefile +--- openjdk.orig/jdk/make/java/net/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/java/net/Makefile 2014-05-13 16:14:56.641091455 +0200 +@@ -25,7 +25,7 @@ + + BUILDDIR = ../.. + PACKAGE = java.net +-LIBRARY = net ++LIBRARY = javanet + PRODUCT = sun + include $(BUILDDIR)/common/Defs.gmk + +diff -Nur openjdk.orig/jdk/make/java/nio/Makefile openjdk/jdk/make/java/nio/Makefile +--- openjdk.orig/jdk/make/java/nio/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/java/nio/Makefile 2014-05-13 16:14:56.645091463 +0200 +@@ -373,7 +373,7 @@ + endif + + ifeq ($(PLATFORM), linux) +- OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -ljava -lnet -lpthread $(LIBDL) ++ OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -ljava -ljavanet -lpthread $(LIBDL) + ifdef USE_SYSTEM_GIO + OTHER_LDLIBS += $(GIO_LIBS) + OTHER_INCLUDES += $(GIO_CFLAGS) -DUSE_SYSTEM_GIO +@@ -927,7 +927,7 @@ + + $(GENSOR_EXE) : $(TEMPDIR)/$(GENSOR_SRC) + $(prep-target) +- ($(CD) $(TEMPDIR); $(NIO_CC) $(CPPFLAGS) $(LDDFLAGS) \ ++ ($(CD) $(TEMPDIR); $(HOST_CC) $(CPPFLAGS_FOR_BUILD) $(LDDFLAGS) \ + -o genSocketOptionRegistry$(EXE_SUFFIX) $(GENSOR_SRC)) + + ifdef NIO_PLATFORM_CLASSES_ROOT_DIR +@@ -963,7 +963,7 @@ + + $(GENUC_EXE) : $(GENUC_SRC) + $(prep-target) +- $(NIO_CC) $(CPPFLAGS) -o $@ $(GENUC_SRC) ++ $(HOST_CC) $(CPPFLAGS_FOR_BUILD) -o $@ $(GENUC_SRC) + + ifdef NIO_PLATFORM_CLASSES_ROOT_DIR + $(SFS_GEN)/UnixConstants.java: $(NIO_PLATFORM_CLASSES_ROOT_DIR)/sun/nio/fs/UnixConstants-$(PLATFORM)-$(ARCH).java +diff -Nur openjdk.orig/jdk/make/java/npt/Makefile openjdk/jdk/make/java/npt/Makefile +--- openjdk.orig/jdk/make/java/npt/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/java/npt/Makefile 2014-05-13 16:14:56.645091463 +0200 +@@ -64,6 +64,8 @@ + # We don't want to link against -ljava + JAVALIB= + ++OTHER_LDLIBS += -liconv ++ + # Add -export options to explicitly spell exported symbols + ifeq ($(PLATFORM), windows) + OTHER_LCF += -export:nptInitialize -export:nptTerminate +diff -Nur openjdk.orig/jdk/make/sun/awt/mawt.gmk openjdk/jdk/make/sun/awt/mawt.gmk +--- openjdk.orig/jdk/make/sun/awt/mawt.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/sun/awt/mawt.gmk 2014-05-13 16:14:56.645091463 +0200 +@@ -151,22 +151,6 @@ + #endif + + LIBXTST = -lXtst +-ifeq ($(PLATFORM), linux) +- ifeq ($(ARCH_DATA_MODEL), 64) +- # XXX what about the rest of them? +- LIBXT = -lXt +- else +- # Allows for builds on Debian GNU Linux, X11 is in a different place +- LIBXT = $(firstword $(wildcard $(OPENWIN_LIB)/libXt.a) \ +- $(wildcard /usr/lib/libXt.a)) +- LIBSM = $(firstword $(wildcard $(OPENWIN_LIB)/libSM.a) \ +- $(wildcard /usr/lib/libSM.a)) +- LIBICE = $(firstword $(wildcard $(OPENWIN_LIB)/libICE.a) \ +- $(wildcard /usr/lib/libICE.a)) +- LIBXTST = $(firstword $(wildcard $(OPENWIN_LIB)/libXtst.a) \ +- $(wildcard /usr/lib/libXtst.a)) +- endif +-endif + + # Use -lXmu for EditRes support + LIBXMU_DBG = -lXmu +@@ -181,7 +165,7 @@ + OTHER_CFLAGS += -DMLIB_NO_LIBSUNMATH + # XXX what is this define below? Isn't it motif-related? + OTHER_CFLAGS += -DXMSTRINGDEFINES=1 +-OTHER_LDLIBS = $(LIBXMU) $(LIBXTST) -lXext $(LIBXT) $(LIBSM) $(LIBICE) -lX11 -lXi ++OTHER_LDLIBS = $(LIBXMU) $(LIBXTST) -lXext -lXt -lSM -lICE -lX11 -lXi + endif + + endif +@@ -231,11 +215,6 @@ + CPPFLAGS += -I$(PLATFORM_SRC)/native/common/deps/fontconfig2 + endif + +-ifndef HEADLESS +-CPPFLAGS += -I$(OPENWIN_HOME)/include +-LDFLAGS += -L$(OPENWIN_LIB) +- +-endif # !HEADLESS + + CPPFLAGS += -I$(SHARE_SRC)/native/$(PKGDIR)/debug \ + -I$(SHARE_SRC)/native/$(PKGDIR)/../font \ +@@ -270,11 +249,6 @@ + endif # !HEADLESS + endif # PLATFORM + +-ifeq ($(PLATFORM), linux) +- # Checking for the X11/extensions headers at the additional location +- CPPFLAGS += -I$(firstword $(wildcard $(OPENWIN_HOME)/include/X11/extensions) \ +- $(wildcard /usr/include/X11/extensions)) +-endif + + ifeq ($(PLATFORM), macosx)) + CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions \ +diff -Nur openjdk.orig/jdk/make/sun/awt/mawt.gmk.orig openjdk/jdk/make/sun/awt/mawt.gmk.orig +--- openjdk.orig/jdk/make/sun/awt/mawt.gmk.orig 1970-01-01 01:00:00.000000000 +0100 ++++ openjdk/jdk/make/sun/awt/mawt.gmk.orig 2014-04-12 01:23:06.000000000 +0200 +@@ -0,0 +1,297 @@ ++# ++# Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. ++# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. ++# ++# This code is free software; you can redistribute it and/or modify it ++# under the terms of the GNU General Public License version 2 only, as ++# published by the Free Software Foundation. Oracle designates this ++# particular file as subject to the "Classpath" exception as provided ++# by Oracle in the LICENSE file that accompanied this code. ++# ++# This code is distributed in the hope that it will be useful, but WITHOUT ++# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ++# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ++# version 2 for more details (a copy is included in the LICENSE file that ++# accompanied this code). ++# ++# You should have received a copy of the GNU General Public License version ++# 2 along with this work; if not, write to the Free Software Foundation, ++# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. ++# ++# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA ++# or visit www.oracle.com if you need additional information or have any ++# questions. ++# ++ ++# ++# to create directory: ++# ++INIT += $(LIB_LOCATION) ++ ++# ++# Files ++# ++# mawt.gmk is just used in building X/Motif native code, so ++# this list of java files is no longer included. ++#include FILES_java_unix.gmk ++include $(BUILDDIR)/sun/awt/FILES_c_unix.gmk ++ ++include $(BUILDDIR)/sun/awt/FILES_export_unix.gmk ++ ++# Check which C files should be built. Headless uses only ++# non-motif files. Also, a version-specific motif file is ++# compiled based on the motif version. ++ifdef HEADLESS ++ FILES_c = $(FILES_NO_MOTIF_c) ++else ++# FILES_c = $(FILES_MOTIF_c) $(FILES_NO_MOTIF_c) ++# XXX if in FILES_MOTIF_c there are unrelated to motif stuff, create a separate list! ++ FILES_c = $(FILES_NO_MOTIF_c) ++endif ++ ++ifeq ($(PLATFORM), solaris) ++ ifneq ($(ARCH), amd64) ++ FILES_reorder += reorder-$(ARCH) ++ endif ++endif ++ ++# ++# Rules ++# ++ ++# Class files should be built & clobbered in make/sun/awt ++# If removing this line, also reinclude sun_awt.jmk ++DONT_CLOBBER_CLASSES = true ++ ++ ++ifndef HEADLESS ++ifeq ($(VARIANT), OPT) ++FILES_m = ../awt/mapfile-mawt-vers ++endif ++endif ++ ++# Since this library will be living in a subdirectory below the other libraries ++# we need to add an extra runpath so that libraries in the upper directory ++# are found at runtime. ++LD_RUNPATH_EXTRAS = .. ++ ++include $(BUILDDIR)/common/Mapfile-vers.gmk ++include $(BUILDDIR)/common/Library.gmk ++ ++$(LIB_LOCATION): ++ $(MKDIR) -p $@ ++ ++clean:: ++ ++# ++# Add to the ambient vpath to pick up files in subdirectories ++# ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/alphacomposite ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/image ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/image/gif ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/image/cvutils ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/shell ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/medialib ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/../java2d/opengl ++vpath %.c $(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/opengl ++vpath %.c $(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/x11 ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/debug ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/../font ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/../java2d ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/../java2d/loops ++vpath %.c $(SHARE_SRC)/native/$(PKGDIR)/../java2d/pipe ++vpath %.cpp $(SHARE_SRC)/native/$(PKGDIR)/image ++vpath %.c $(PLATFORM_SRC)/native/$(PKGDIR)/robot_child ++ ++ifndef USE_SYSTEM_CUPS ++vpath %.c $(PLATFORM_SRC)/native/common/deps ++endif ++ ++ifndef USE_SYSTEM_FONTCONFIG ++vpath %.c $(PLATFORM_SRC)/native/common/deps/fontconfig2 ++endif ++ ++# ++# Libraries to link in. ++# ++ ++ ++ifeq ($(DEBUG_BINARIES), true) ++ CFLAGS += -g ++endif ++ifeq ($(HEADLESS),true) ++CFLAGS += -DHEADLESS=$(HEADLESS) ++CPPFLAGS += -DHEADLESS=$(HEADLESS) ++OTHER_LDLIBS = ++else ++#CFLAGS += -DMOTIF_VERSION=$(MOTIF_VERSION) ++ ++#ifeq ($(STATIC_MOTIF),true) ++# LIBXM = $(MOTIF_LIB)/libXm.a -lXp -lXmu ++# ifeq ($(PLATFORM), linux) ++# ifeq ($(ARCH_DATA_MODEL), 64) ++# LIBXT = -lXt ++# else ++# # Allows for builds on Debian GNU Linux, X11 is in a different place ++# LIBXT = $(firstword $(wildcard /usr/X11R6/lib/libXt.a) \ ++# $(wildcard /usr/lib/libXt.a)) ++# LIBSM = $(firstword $(wildcard /usr/X11R6/lib/libSM.a) \ ++# $(wildcard /usr/lib/libSM.a)) ++# LIBICE = $(firstword $(wildcard /usr/X11R6/lib/libICE.a) \ ++# $(wildcard /usr/lib/libICE.a)) ++# endif ++# endif ++#else ++# LIBXM = -L$(MOTIF_LIB) -lXm -lXp ++# ifeq ($(PLATFORM), linux) ++# LIBXT = -lXt ++# LIBSM = ++# LIBICE = ++# endif ++#endif ++ ++LIBXTST = -lXtst ++ifeq ($(PLATFORM), linux) ++ ifeq ($(ARCH_DATA_MODEL), 64) ++ # XXX what about the rest of them? ++ LIBXT = -lXt ++ else ++ # Allows for builds on Debian GNU Linux, X11 is in a different place ++ LIBXT = $(firstword $(wildcard $(OPENWIN_LIB)/libXt.a) \ ++ $(wildcard /usr/lib/libXt.a)) ++ LIBSM = $(firstword $(wildcard $(OPENWIN_LIB)/libSM.a) \ ++ $(wildcard /usr/lib/libSM.a)) ++ LIBICE = $(firstword $(wildcard $(OPENWIN_LIB)/libICE.a) \ ++ $(wildcard /usr/lib/libICE.a)) ++ LIBXTST = $(firstword $(wildcard $(OPENWIN_LIB)/libXtst.a) \ ++ $(wildcard /usr/lib/libXtst.a)) ++ endif ++endif ++ ++# Use -lXmu for EditRes support ++LIBXMU_DBG = -lXmu ++LIBXMU_OPT = ++LIBXMU = $(LIBXMU_$(VARIANT)) ++ ++ifeq ($(PLATFORM), solaris) ++OTHER_LDLIBS = -lXt -lXext $(LIBXTST) $(LIBXMU) -lX11 -lXi ++endif ++ ++ifneq (,$(findstring $(PLATFORM), linux macosx)) ++OTHER_CFLAGS += -DMLIB_NO_LIBSUNMATH ++# XXX what is this define below? Isn't it motif-related? ++OTHER_CFLAGS += -DXMSTRINGDEFINES=1 ++OTHER_LDLIBS = $(LIBXMU) $(LIBXTST) -lXext $(LIBXT) $(LIBSM) $(LIBICE) -lX11 -lXi ++endif ++ ++endif ++# !HEADLESS ++ ++OTHER_LDLIBS += $(JVMLIB) $(LIBCXX) \ ++ -lawt $(LIBM) ++ ++ifdef USE_SYSTEM_CUPS ++ OTHER_LDLIBS += $(CUPS_LIBS) ++else ++ OTHER_LDLIBS += $(LIBDL) ++endif ++ ++ifdef USE_SYSTEM_FONTCONFIG ++ OTHER_LDLIBS += $(FONTCONFIG_LIBS) ++else ++ OTHER_LDLIBS += $(LIBDL) ++endif ++ ++# ++# Sun CC with -Xa misdefines __STDC__ to 0 (zero). ++# The following will force checking of X11 prototypes. ++# ++ifneq ($(CC_VERSION),gcc) ++CPPFLAGS += -DFUNCPROTO=15 ++endif ++ ++# ++# Other extra flags needed for compiling. ++# ++ifdef CUPS_CFLAGS ++ CPPFLAGS += $(CUPS_CFLAGS) ++else ++ CPPFLAGS += -I$(CUPS_HEADERS_PATH) ++endif ++ ++ifdef USE_SYSTEM_CUPS ++ CPPFLAGS += -DUSE_SYSTEM_CUPS ++else ++ CPPFLAGS += -I$(PLATFORM_SRC)/native/common/deps ++endif ++ ++ifdef USE_SYSTEM_FONTCONFIG ++ CPPFLAGS += $(FONTCONFIG_CFLAGS) -DUSE_SYSTEM_FONTCONFIG ++else ++ CPPFLAGS += -I$(PLATFORM_SRC)/native/common/deps/fontconfig2 ++endif ++ ++ifndef HEADLESS ++CPPFLAGS += -I$(OPENWIN_HOME)/include ++LDFLAGS += -L$(OPENWIN_LIB) ++ ++endif # !HEADLESS ++ ++CPPFLAGS += -I$(SHARE_SRC)/native/$(PKGDIR)/debug \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../font \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR)/../font \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/image \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/image/cvutils \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/shell \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/alphacomposite \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/medialib \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR)/medialib \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR)/../java2d \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d/loops \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d/pipe \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d/opengl \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/opengl \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/x11 \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../dc/doe \ ++ -I$(SHARE_SRC)/native/$(PKGDIR)/../dc/path \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR)/../jdga \ ++ -I$(PLATFORM_SRC)/native/$(PKGDIR) \ ++ $(EVENT_MODEL) ++ ++ifeq ($(PLATFORM), macosx) ++CPPFLAGS += -I$(CUPS_HEADERS_PATH) ++ ++ifndef HEADLESS ++CPPFLAGS += -I$(MOTIF_DIR)/include \ ++ -I$(OPENWIN_HOME)/include ++LDFLAGS += -L$(MOTIF_LIB) -L$(OPENWIN_LIB) ++ ++endif # !HEADLESS ++endif # PLATFORM ++ ++ifeq ($(PLATFORM), linux) ++ # Checking for the X11/extensions headers at the additional location ++ CPPFLAGS += -I$(firstword $(wildcard $(OPENWIN_HOME)/include/X11/extensions) \ ++ $(wildcard /usr/include/X11/extensions)) ++endif ++ ++ifeq ($(PLATFORM), macosx)) ++ CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions \ ++ -I$(OPENWIN_HOME)/include ++endif ++ ++ifeq ($(PLATFORM), solaris) ++ CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions ++endif ++ ++ifeq ($(PLATFORM), macosx) ++ CPPFLAGS += -DX11_PATH=\"$(X11_PATH)\" -DPACKAGE_PATH=\"$(PACKAGE_PATH)\" ++endif ++ ++LDFLAGS += -L$(LIBDIR)/$(LIBARCH)/$(TSOBJDIR) \ ++ $(AWT_RUNPATH) ++ ++CLASSES.export += java.io.InputStream \ ++ java.lang.ThreadGroup ++ +diff -Nur openjdk.orig/jdk/make/sun/splashscreen/Makefile openjdk/jdk/make/sun/splashscreen/Makefile +--- openjdk.orig/jdk/make/sun/splashscreen/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/sun/splashscreen/Makefile 2014-05-13 16:14:56.645091463 +0200 +@@ -55,6 +55,8 @@ + + JAVALIB= + ++OTHER_LDLIBS += -liconv ++ + # + # C Flags + # +diff -Nur openjdk.orig/jdk/make/sun/xawt/Makefile openjdk/jdk/make/sun/xawt/Makefile +--- openjdk.orig/jdk/make/sun/xawt/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/make/sun/xawt/Makefile 2014-05-13 16:14:56.645091463 +0200 +@@ -292,16 +292,10 @@ + SIZERS = $(SIZER).32 + SIZERS_C = $(SIZER_32_C) + SIZES = $(WRAPPER_GENERATOR_DIR)/sizes.32 +-ifdef CROSS_COMPILE_ARCH +-CFLAGS_32 = -m32 +-endif + else # !32 + SIZERS = $(SIZER).64 + SIZERS_C = $(SIZER_64_C) + SIZES = $(WRAPPER_GENERATOR_DIR)/sizes.64 +-ifdef CROSS_COMPILE_ARCH +-CFLAGS_64 = -m64 +-endif + endif # 32 + endif # !macosx + endif # solaris +@@ -337,11 +331,7 @@ + WRAPPER_GENERATOR_CLASS=$(WRAPPER_GENERATOR_TEMPDIR)/WrapperGenerator.class + XLIBTYPES=$(PLATFORM_SRC)/classes/sun/awt/X11/generator/xlibtypes.txt + +-ifndef CROSS_COMPILE_ARCH +-SIZERS_CC = $(CC) +-else +-SIZERS_CC = $(HOST_CC) +-endif ++SIZERS_CC = $(CC) -static + + $(SIZERS): $(SIZERS_C) + $(prep-target) +@@ -364,7 +354,7 @@ + $(CHMOD) +w $@;\ + else \ + $(ECHO) GENERATING $@; \ +- $(WRAPPER_GENERATOR_DIR)/sizer$(suffix $@) > $@; \ ++ $(QEMU) $(WRAPPER_GENERATOR_DIR)/sizer$(suffix $@) > $@; \ + fi + @if [ "$(DOCOMPARE)$(suffix $@)" = "true.64" ]; then \ + $(ECHO) COMPARING $@ and $(STORED_SIZES_TMPL_$(PLATFORM)_$(LIBARCH)); \ +diff -Nur openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java openjdk/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java +--- openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java 2014-05-13 16:14:56.645091463 +0200 +@@ -69,7 +69,7 @@ + */ + static { + java.security.AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + } + + /** +diff -Nur openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java openjdk/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java +--- openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java 2014-05-13 16:14:56.645091463 +0200 +@@ -78,7 +78,7 @@ + */ + static { + java.security.AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + } + + /** +diff -Nur openjdk.orig/jdk/src/share/classes/java/net/DatagramPacket.java openjdk/jdk/src/share/classes/java/net/DatagramPacket.java +--- openjdk.orig/jdk/src/share/classes/java/net/DatagramPacket.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/java/net/DatagramPacket.java 2014-05-13 16:14:56.645091463 +0200 +@@ -47,7 +47,7 @@ + */ + static { + java.security.AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + init(); + } + +diff -Nur openjdk.orig/jdk/src/share/classes/java/net/InetAddress.java openjdk/jdk/src/share/classes/java/net/InetAddress.java +--- openjdk.orig/jdk/src/share/classes/java/net/InetAddress.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/java/net/InetAddress.java 2014-05-13 16:14:56.649091471 +0200 +@@ -267,7 +267,7 @@ + static { + preferIPv6Address = java.security.AccessController.doPrivileged( + new GetBooleanAction("java.net.preferIPv6Addresses")).booleanValue(); +- AccessController.doPrivileged(new LoadLibraryAction("net")); ++ AccessController.doPrivileged(new LoadLibraryAction("javanet")); + init(); + } + +diff -Nur openjdk.orig/jdk/src/share/classes/java/net/NetworkInterface.java openjdk/jdk/src/share/classes/java/net/NetworkInterface.java +--- openjdk.orig/jdk/src/share/classes/java/net/NetworkInterface.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/java/net/NetworkInterface.java 2014-05-13 16:14:56.649091471 +0200 +@@ -53,7 +53,7 @@ + private static final int defaultIndex; /* index of defaultInterface */ + + static { +- AccessController.doPrivileged(new LoadLibraryAction("net")); ++ AccessController.doPrivileged(new LoadLibraryAction("javanet")); + init(); + defaultInterface = DefaultInterface.getDefault(); + if (defaultInterface != null) { +diff -Nur openjdk.orig/jdk/src/share/classes/sun/net/sdp/SdpSupport.java openjdk/jdk/src/share/classes/sun/net/sdp/SdpSupport.java +--- openjdk.orig/jdk/src/share/classes/sun/net/sdp/SdpSupport.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/sun/net/sdp/SdpSupport.java 2014-05-13 16:14:56.649091471 +0200 +@@ -76,6 +76,6 @@ + + static { + AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + } + } +diff -Nur openjdk.orig/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java openjdk/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java +--- openjdk.orig/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java 2014-05-13 16:14:56.649091471 +0200 +@@ -95,7 +95,7 @@ + }}); + if (b != null && b.booleanValue()) { + java.security.AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + hasSystemProxies = init(); + } + } +diff -Nur openjdk.orig/jdk/src/share/classes/sun/nio/ch/Util.java openjdk/jdk/src/share/classes/sun/nio/ch/Util.java +--- openjdk.orig/jdk/src/share/classes/sun/nio/ch/Util.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/share/classes/sun/nio/ch/Util.java 2014-05-13 16:14:56.649091471 +0200 +@@ -483,7 +483,7 @@ + return; + loaded = true; + java.security.AccessController +- .doPrivileged(new sun.security.action.LoadLibraryAction("net")); ++ .doPrivileged(new sun.security.action.LoadLibraryAction("javanet")); + java.security.AccessController + .doPrivileged(new sun.security.action.LoadLibraryAction("nio")); + // IOUtil must be initialized; Its native methods are called from +diff -Nur openjdk.orig/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java openjdk/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java +--- openjdk.orig/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java 2014-05-13 16:14:56.649091471 +0200 +@@ -247,7 +247,7 @@ + + static { + java.security.AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + } + + } +diff -Nur openjdk.orig/jdk/src/solaris/native/sun/awt/awt_InputMethod.c openjdk/jdk/src/solaris/native/sun/awt/awt_InputMethod.c +--- openjdk.orig/jdk/src/solaris/native/sun/awt/awt_InputMethod.c 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/solaris/native/sun/awt/awt_InputMethod.c 2014-05-13 16:14:56.649091471 +0200 +@@ -246,7 +246,8 @@ + if (wcs == NULL) + return NULL; + +- n = len*MB_CUR_MAX + 1; ++ //evil hack for uclibc ++ n = len*1 + 1; + + mbs = (char *) malloc(n * sizeof(char)); + if (mbs == NULL) { +diff -Nur openjdk.orig/jdk/src/solaris/native/sun/xawt/XToolkit.c openjdk/jdk/src/solaris/native/sun/xawt/XToolkit.c +--- openjdk.orig/jdk/src/solaris/native/sun/xawt/XToolkit.c 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/solaris/native/sun/xawt/XToolkit.c 2014-05-13 16:14:56.649091471 +0200 +@@ -27,9 +27,6 @@ + #include + #include + #include +-#ifdef __linux__ +-#include +-#endif + + #include + #include +@@ -785,25 +782,6 @@ + return ret; + } + +-#ifdef __linux__ +-void print_stack(void) +-{ +- void *array[10]; +- size_t size; +- char **strings; +- size_t i; +- +- size = backtrace (array, 10); +- strings = backtrace_symbols (array, size); +- +- fprintf (stderr, "Obtained %zd stack frames.\n", size); +- +- for (i = 0; i < size; i++) +- fprintf (stderr, "%s\n", strings[i]); +- +- free (strings); +-} +-#endif + + Window get_xawt_root_shell(JNIEnv *env) { + static jclass classXRootWindow = NULL; +diff -Nur openjdk.orig/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java openjdk/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java +--- openjdk.orig/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java 2014-05-13 16:14:56.649091471 +0200 +@@ -159,7 +159,7 @@ + + static { + java.security.AccessController.doPrivileged( +- new sun.security.action.LoadLibraryAction("net")); ++ new sun.security.action.LoadLibraryAction("javanet")); + init0(); + + // start the address listener thread +diff -Nur openjdk.orig/Makefile openjdk/Makefile +--- openjdk.orig/Makefile 2014-04-04 19:44:40.000000000 +0200 ++++ openjdk/Makefile 2014-05-13 16:14:56.649091471 +0200 +@@ -53,9 +53,7 @@ + REL_JDK_DEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-debug)/$(JDK_IMAGE_DIRNAME) + REL_JDK_FASTDEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-fastdebug)/$(JDK_IMAGE_DIRNAME) + +-ifndef TOPDIR +- TOPDIR:=. +-endif ++TOPDIR:=. + + ifndef JDK_TOPDIR + JDK_TOPDIR=$(TOPDIR)/jdk +diff -Nur openjdk-boot.orig/hotspot/make/linux/makefiles/vm.make openjdk-boot/hotspot/make/linux/makefiles/vm.make +--- openjdk-boot.orig/hotspot/make/linux/makefiles/vm.make 2014-02-20 19:51:45.000000000 +0100 ++++ openjdk-boot/hotspot/make/linux/makefiles/vm.make 2014-05-01 20:03:03.677930438 +0200 +@@ -288,7 +288,7 @@ + LIBS_VM += $(LIBS) + endif + ifeq ($(JVM_VARIANT_ZEROSHARK), true) +- LIBS_VM += $(LIBFFI_LIBS) $(LLVM_LIBS) ++ LIBS_VM += $(LLVM_LIBS) + LFLAGS_VM += $(LLVM_LDFLAGS) + endif + +diff -Nur openjdk-boot.orig/hotspot/make/linux/makefiles/zero.make openjdk-boot/hotspot/make/linux/makefiles/zero.make +--- openjdk-boot.orig/hotspot/make/linux/makefiles/zero.make 2014-02-20 19:51:45.000000000 +0100 ++++ openjdk-boot/hotspot/make/linux/makefiles/zero.make 2014-05-01 20:03:03.677930438 +0200 +@@ -33,4 +33,4 @@ + + # Make sure libffi is included + CFLAGS += $(LIBFFI_CFLAGS) +-LIBS_VM += $(LIBFFI_LIBS) ++LIBS_VM += $(FFI_LDFLAGS) -Wl,-Bstatic $(LIBFFI_LIBS) -Wl,-Bdynamic +diff -Nur openjdk-boot.orig/jdk/make/common/Sanity.gmk openjdk-boot/jdk/make/common/Sanity.gmk +--- openjdk-boot.orig/jdk/make/common/Sanity.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk-boot/jdk/make/common/Sanity.gmk 2014-05-01 20:03:03.677930438 +0200 +@@ -91,8 +91,7 @@ + sane-ld_run_path \ + sane-alt_bootdir \ + sane-bootdir \ +- sane-local-bootdir \ +- sane-alsa-headers ++ sane-local-bootdir + + ifdef OPENJDK + sanity-all:: sane-freetype +diff -Nur openjdk-boot.orig/jdk/make/common/shared/Sanity.gmk openjdk-boot/jdk/make/common/shared/Sanity.gmk +--- openjdk-boot.orig/jdk/make/common/shared/Sanity.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk-boot/jdk/make/common/shared/Sanity.gmk 2014-05-01 20:03:03.681930476 +0200 +@@ -114,11 +114,6 @@ + elif [ -f /etc/lsb-release ] ; then \ + $(EGREP) DISTRIB_RELEASE /etc/lsb-release | $(SED) -e 's@.*DISTRIB_RELEASE=\(.*\)@\1@'; \ + fi) +- ALSA_INCLUDE=/usr/include/alsa/version.h +- ALSA_LIBRARY=/usr/lib/libasound.so +- _ALSA_VERSION := $(shell $(EGREP) SND_LIB_VERSION_STR $(ALSA_INCLUDE) | \ +- $(SED) -e 's@.*"\(.*\)".*@\1@' ) +- ALSA_VERSION := $(call GetVersion,$(_ALSA_VERSION)) + endif + + ifeq ($(PLATFORM), macosx) +@@ -225,7 +220,6 @@ + sane-compiler \ + sane-link \ + sane-cacerts \ +- sane-alsa-headers \ + sane-ant_version \ + sane-zip_version \ + sane-unzip_version \ +@@ -1381,35 +1375,6 @@ + endif + endif + +-###################################################### +-# Check that ALSA headers and libs are installed and +-# that the header has the right version. We only +-# need /usr/include/alsa/version.h and /usr/lib/libasound.so +-###################################################### +- +-ifdef REQUIRED_ALSA_VERSION +- ALSA_CHECK := $(call CheckVersions,$(ALSA_VERSION),$(REQUIRED_ALSA_VERSION)) +-endif +-sane-alsa-headers: +-ifdef REQUIRED_ALSA_VERSION +- @if [ "$(ALSA_CHECK)" != "missing" ] ; then \ +- if [ "$(ALSA_CHECK)" != "same" -a "$(ALSA_CHECK)" != "newer" ] ; then \ +- $(ECHO) "ERROR: The ALSA version must be $(REQUIRED_ALSA_VERSION) or higher. \n" \ +- " You have the following ALSA version installed: $${alsa_version} \n" \ +- " Please reinstall ALSA (drivers and lib). You can download \n" \ +- " the source distribution from http://www.alsa-project.org \n" \ +- " or go to http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \ +- "" >> $(ERROR_FILE) ; \ +- fi ; \ +- else \ +- $(ECHO) "ERROR: You seem to not have installed ALSA $(REQUIRED_ALSA_VERSION) or higher. \n" \ +- " Please install ALSA (drivers and lib). You can download the \n" \ +- " source distribution from http://www.alsa-project.org or go to \n" \ +- " http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \ +- "" >> $(ERROR_FILE) ; \ +- fi +-endif +- + # If a sanity file doesn't exist, just make sure it's dir exists + $(SANITY_FILES): + -@$(prep-target) +diff -Nur openjdk-boot.orig/jdk/make/javax/sound/jsoundalsa/Makefile openjdk-boot/jdk/make/javax/sound/jsoundalsa/Makefile +--- openjdk-boot.orig/jdk/make/javax/sound/jsoundalsa/Makefile 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk-boot/jdk/make/javax/sound/jsoundalsa/Makefile 2014-05-15 15:49:03.886269427 +0200 +@@ -72,6 +72,7 @@ + -DUSE_PORTS=TRUE \ + -DUSE_PLATFORM_MIDI_OUT=TRUE \ + -DUSE_PLATFORM_MIDI_IN=TRUE \ ++ $(ALSA_CPPFLAGS) \ + -I$(SHARE_SRC)/native/com/sun/media/sound + + # +diff -Nur openjdk-boot.orig/jdk/make/sun/awt/mawt.gmk openjdk-boot/jdk/make/sun/awt/mawt.gmk +--- openjdk-boot.orig/jdk/make/sun/awt/mawt.gmk 2014-04-12 01:23:06.000000000 +0200 ++++ openjdk-boot/jdk/make/sun/awt/mawt.gmk 2014-05-01 20:03:03.681930476 +0200 +@@ -270,12 +270,6 @@ + endif # !HEADLESS + endif # PLATFORM + +-ifeq ($(PLATFORM), linux) +- # Checking for the X11/extensions headers at the additional location +- CPPFLAGS += -I$(firstword $(wildcard $(OPENWIN_HOME)/include/X11/extensions) \ +- $(wildcard /usr/include/X11/extensions)) +-endif +- + ifeq ($(PLATFORM), macosx)) + CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions \ + -I$(OPENWIN_HOME)/include +diff -Nur openjdk-boot.orig/Makefile openjdk-boot/Makefile +--- openjdk-boot.orig/Makefile 2014-04-04 19:44:40.000000000 +0200 ++++ openjdk-boot/Makefile 2014-05-01 20:02:54.549843414 +0200 +@@ -53,9 +53,7 @@ + REL_JDK_DEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-debug)/$(JDK_IMAGE_DIRNAME) + REL_JDK_FASTDEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-fastdebug)/$(JDK_IMAGE_DIRNAME) + +-ifndef TOPDIR +- TOPDIR:=. +-endif ++TOPDIR:=. + + ifndef JDK_TOPDIR + JDK_TOPDIR=$(TOPDIR)/jdk