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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-09-24 02:55:31 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-09-26 20:23:24 +0200
commit29ff9055c80efe77a7130767a9fcb3ab8c67e8ce (patch)
treeb061656c1336d7d73ed5eef59352e3d50d8147a7 /libpthread/nptl/sysdeps/pthread
parentb06f85d62c41a4ed108628b1c564203f36c0ab4e (diff)
use a single libc and deduplicate threading code
Similar to musl libc a single libc has many benefits and solves some open issues with uClibc-ng. - no pthread_mutex_* weak symbols exported anymore - applications no longer failing to link when either -lrt or -lpthread are missing for dynamic and static linking mode - smaller C library - slightly better runtime performance
Diffstat (limited to 'libpthread/nptl/sysdeps/pthread')
-rw-r--r--libpthread/nptl/sysdeps/pthread/Makefile.in51
-rw-r--r--libpthread/nptl/sysdeps/pthread/bits/libc-lock.h10
-rw-r--r--libpthread/nptl/sysdeps/pthread/pt-initfini.c128
-rw-r--r--libpthread/nptl/sysdeps/pthread/pt-sigaction.c7
-rw-r--r--libpthread/nptl/sysdeps/pthread/pthread-functions.h108
-rw-r--r--libpthread/nptl/sysdeps/pthread/setxid.h6
-rw-r--r--libpthread/nptl/sysdeps/pthread/uClibc-glue.h1
7 files changed, 4 insertions, 307 deletions
diff --git a/libpthread/nptl/sysdeps/pthread/Makefile.in b/libpthread/nptl/sysdeps/pthread/Makefile.in
index 9d99f3158..a501b6403 100644
--- a/libpthread/nptl/sysdeps/pthread/Makefile.in
+++ b/libpthread/nptl/sysdeps/pthread/Makefile.in
@@ -43,62 +43,11 @@ CFLAGS-pthread_spin_unlock.c = -D_GNU_SOURCE
CFLAGS-unwind-forcedunwind.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-OMIT-librt-cancellation.c = -DIS_IN_libpthread
-CFLAGS-OMIT-rt-unwind-resume.c = -DIS_IN_libpthread
CFLAGS-librt-cancellation.c = -DIS_IN_librt \
-fexceptions -fasynchronous-unwind-tables
-CFLAGS-rt-unwind-resume.c = -DIS_IN_librt \
- -fexceptions -fasynchronous-unwind-tables
-
libpthread-so-y += $(patsubst %,$(libpthread_pthread_OUT)/%.oS, unwind-forcedunwind)
librt-pt-routines-y = librt-cancellation.c
-librt-pt-shared-only-routines-y = rt-unwind-resume.c
-
-ifeq ($(UCLIBC_CTOR_DTOR),y)
-CFLAGS-OMIT-pt-initfini.c = $(CFLAGS-y-libpthread/nptl/sysdeps/pthread)
-CFLAGS-pt-initfini.c = -S -g0 $(PICFLAG) -fno-inline-functions \
- $(call check_gcc,-fno-unit-at-a-time,) \
- $(SSP_DISABLE_FLAGS) \
- -finhibit-size-directive \
- -fno-asynchronous-unwind-tables -fno-unwind-tables \
- $(patsubst -f%,-fno-%,$(call check_gcc,-fexceptions,))
-
-#ASFLAGS += $(PICFLAG) -I$(top_srcdir)include -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
-ifneq ($(wildcard $(libpthread_pthread_DIR)/../unix/sysv/linux/$(TARGET_ARCH)/pt-initfini.c),)
-PTHREAD_INITFINI := $(libpthread_pthread_DIR)/../unix/sysv/linux/$(TARGET_ARCH)/pt-initfini.c
-else
-PTHREAD_INITFINI := $(libpthread_pthread_DIR)/pt-initfini.c
-endif
-
-ASFLAGS-pt-crti.S = $(PICFLAG)
-ASFLAGS-pt-crtn.S = $(PICFLAG)
-
-$(libpthread_pthread_OUT)/pt-crti.o: $(libpthread_pthread_OUT)/pt-crti.S
- $(compile.S)
-
-$(libpthread_pthread_OUT)/pt-crtn.o: $(libpthread_pthread_OUT)/pt-crtn.S
- $(compile.S)
-
-$(libpthread_pthread_OUT)/pt-initfini.s: $(PTHREAD_INITFINI) | $(headers_dep)
- $(compile.c)
-$(libpthread_pthread_OUT)/defs.h: $(PTHREAD_INITFINI)
- $(do_sed) -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \
- $(AWK) -f $(top_srcdir)extra/scripts/defs.awk > $@.tmp
- $(Q)mv $@.tmp $@
-
-$(libpthread_pthread_OUT)/pt-crti.S: $(libpthread_pthread_OUT)/pt-initfini.s $(libpthread_pthread_OUT)/defs.h
- $(do_sed) -n -e '/[ ]*\.file/d' \
- -e '1,/@HEADER_ENDS/p' \
- -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
- -e '/@TRAILER_BEGINS/,$$p' $< > $@.tmp
- $(Q)mv $@.tmp $@
-$(libpthread_pthread_OUT)/pt-crtn.S: $(libpthread_pthread_OUT)/pt-initfini.s $(libpthread_pthread_OUT)/defs.h
- $(do_sed) -n -e '/[ ]*\.file/d' \
- -e '1,/@HEADER_ENDS/p' \
- -e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
- -e '/@TRAILER_BEGINS/,$$p' $< > $@.tmp
- $(Q)mv $@.tmp $@
-endif
objclean-y += CLEAN_libpthread/nptl/sysdeps/pthread
diff --git a/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h b/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h
index 633021ab1..a4c5b626b 100644
--- a/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h
+++ b/libpthread/nptl/sysdeps/pthread/bits/libc-lock.h
@@ -34,7 +34,6 @@
#ifdef _LIBC
# include <lowlevellock.h>
# include <tls.h>
-# include <pthread-functions.h>
#endif
/* Mutex type. */
@@ -152,20 +151,11 @@ typedef pthread_key_t __libc_key_t;
(FUNC != NULL ? FUNC ARGS : ELSE)
#endif
-/* Call thread functions through the function pointer table. */
-#if defined SHARED && !defined NOT_IN_libc
-# define PTFAVAIL(NAME) __libc_pthread_functions_init
-# define __libc_ptf_call(FUNC, ARGS, ELSE) \
- (__libc_pthread_functions_init ? PTHFCT_CALL (ptr_##FUNC, ARGS) : ELSE)
-# define __libc_ptf_call_always(FUNC, ARGS) \
- PTHFCT_CALL (ptr_##FUNC, ARGS)
-#else
# define PTFAVAIL(NAME) (NAME != NULL)
# define __libc_ptf_call(FUNC, ARGS, ELSE) \
__libc_maybe_call (FUNC, ARGS, ELSE)
# define __libc_ptf_call_always(FUNC, ARGS) \
FUNC ARGS
-#endif
/* Initialize the named lock variable, leaving it in a consistent, unlocked
diff --git a/libpthread/nptl/sysdeps/pthread/pt-initfini.c b/libpthread/nptl/sysdeps/pthread/pt-initfini.c
deleted file mode 100644
index d9881c7a8..000000000
--- a/libpthread/nptl/sysdeps/pthread/pt-initfini.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/* Special .init and .fini section support. Linuxthread version.
- Copyright (C) 1995,1996,1997,2000,2001,2002 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it
- and/or modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- In addition to the permissions in the GNU Lesser General Public
- License, the Free Software Foundation gives you unlimited
- permission to link the compiled version of this file with other
- programs, and to distribute those programs without any restriction
- coming from the use of this file. (The Library General Public
- License restrictions do apply in other respects; for example, they
- cover modification of the file, and distribution when not linked
- into another program.)
-
- The GNU C Library 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 Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- see <http://www.gnu.org/licenses/>. */
-
-/* This file is compiled into assembly code which is then munged by a sed
- script into two files: crti.s and crtn.s.
-
- * crti.s puts a function prologue at the beginning of the
- .init and .fini sections and defines global symbols for
- those addresses, so they can be called as functions.
-
- * crtn.s puts the corresponding function epilogues
- in the .init and .fini sections. */
-
-#include <stdlib.h>
-
-/* We use embedded asm for .section unconditionally, as this makes it
- easier to insert the necessary directives into crtn.S. */
-#define SECTION(x) __asm__ (".section " x )
-
-/* Embed an #include to pull in the alignment and .end directives. */
-__asm__ ("\n#include \"defs.h\"");
-__asm__ ("\n#if defined __i686 && defined __ASSEMBLER__");
-__asm__ ("\n#undef __i686");
-__asm__ ("\n#define __i686 __i686");
-__asm__ ("\n#endif");
-
-/* The initial common code ends here. */
-__asm__ ("\n/*@HEADER_ENDS*/");
-
-/* To determine whether we need .end and .align: */
-__asm__ ("\n/*@TESTS_BEGIN*/");
-extern void dummy (void (*foo) (void));
-void
-dummy (void (*foo) (void))
-{
- if (foo)
- (*foo) ();
-}
-__asm__ ("\n/*@TESTS_END*/");
-
-/* The beginning of _init: */
-__asm__ ("\n/*@_init_PROLOG_BEGINS*/");
-
-static void
-call_initialize_minimal (void)
-{
- extern void __pthread_initialize_minimal_internal (void)
- __attribute ((visibility ("hidden")));
-
- __pthread_initialize_minimal_internal ();
-}
-
-SECTION (".init");
-extern void __attribute__ ((section (".init"))) _init (void);
-void
-_init (void)
-{
- /* The very first thing we must do is to set up the registers. */
- call_initialize_minimal ();
-
- __asm__ ("ALIGN");
- __asm__("END_INIT");
- /* Now the epilog. */
- __asm__ ("\n/*@_init_PROLOG_ENDS*/");
- __asm__ ("\n/*@_init_EPILOG_BEGINS*/");
- SECTION(".init");
-}
-__asm__ ("END_INIT");
-
-/* End of the _init epilog, beginning of the _fini prolog. */
-__asm__ ("\n/*@_init_EPILOG_ENDS*/");
-__asm__ ("\n/*@_fini_PROLOG_BEGINS*/");
-
-SECTION (".fini");
-extern void __attribute__ ((section (".fini"))) _fini (void);
-void
-_fini (void)
-{
-
- /* End of the _fini prolog. */
- __asm__ ("ALIGN");
- __asm__ ("END_FINI");
- __asm__ ("\n/*@_fini_PROLOG_ENDS*/");
-
- {
- /* Let GCC know that _fini is not a leaf function by having a dummy
- function call here. We arrange for this call to be omitted from
- either crt file. */
- extern void i_am_not_a_leaf (void);
- i_am_not_a_leaf ();
- }
-
- /* Beginning of the _fini epilog. */
- __asm__ ("\n/*@_fini_EPILOG_BEGINS*/");
- SECTION (".fini");
-}
-__asm__ ("END_FINI");
-
-/* End of the _fini epilog. Any further generated assembly (e.g. .ident)
- is shared between both crt files. */
-__asm__ ("\n/*@_fini_EPILOG_ENDS*/");
-__asm__ ("\n/*@TRAILER_BEGINS*/");
-
-/* End of file. */
diff --git a/libpthread/nptl/sysdeps/pthread/pt-sigaction.c b/libpthread/nptl/sysdeps/pthread/pt-sigaction.c
index 43a2da213..d8fa4c94f 100644
--- a/libpthread/nptl/sysdeps/pthread/pt-sigaction.c
+++ b/libpthread/nptl/sysdeps/pthread/pt-sigaction.c
@@ -22,9 +22,10 @@
/* We use the libc implementation but we tell it to not allow
SIGCANCEL or SIGTIMER to be handled. */
+libc_hidden_proto(sigaction)
extern __typeof(sigaction) __libc_sigaction;
int
-__sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
if (unlikely (sig == SIGCANCEL || sig == SIGSETXID))
{
@@ -34,6 +35,4 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
return __libc_sigaction (sig, act, oact);
}
-libc_hidden_proto(sigaction)
-weak_alias (__sigaction, sigaction)
-libc_hidden_weak(sigaction)
+libc_hidden_def(sigaction)
diff --git a/libpthread/nptl/sysdeps/pthread/pthread-functions.h b/libpthread/nptl/sysdeps/pthread/pthread-functions.h
deleted file mode 100644
index 9c78180c5..000000000
--- a/libpthread/nptl/sysdeps/pthread/pthread-functions.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/* Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#ifndef _PTHREAD_FUNCTIONS_H
-#define _PTHREAD_FUNCTIONS_H 1
-
-#include <pthread.h>
-#include <setjmp.h>
-#include <internaltypes.h>
-#include <sysdep.h>
-
-struct xid_command;
-
-/* Data type shared with libc. The libc uses it to pass on calls to
- the thread functions. */
-struct pthread_functions
-{
- int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
- int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
- int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
- int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
- int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
- int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
- int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
- int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *,
- struct sched_param *);
- int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *,
- const struct sched_param *);
- int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
- int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
- int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
- int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
- int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
- int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
- int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
- int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
- int (*ptr___pthread_cond_init) (pthread_cond_t *,
- const pthread_condattr_t *);
- int (*ptr___pthread_cond_signal) (pthread_cond_t *);
- int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
- int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *,
- const struct timespec *);
- int (*ptr___pthread_cond_broadcast_2_0) (pthread_cond_2_0_t *);
- int (*ptr___pthread_cond_destroy_2_0) (pthread_cond_2_0_t *);
- int (*ptr___pthread_cond_init_2_0) (pthread_cond_2_0_t *,
- const pthread_condattr_t *);
- int (*ptr___pthread_cond_signal_2_0) (pthread_cond_2_0_t *);
- int (*ptr___pthread_cond_wait_2_0) (pthread_cond_2_0_t *, pthread_mutex_t *);
- int (*ptr___pthread_cond_timedwait_2_0) (pthread_cond_2_0_t *,
- pthread_mutex_t *,
- const struct timespec *);
- int (*ptr_pthread_equal) (pthread_t, pthread_t);
- void (*ptr___pthread_exit) (void *);
- int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
- int (*ptr_pthread_setschedparam) (pthread_t, int,
- const struct sched_param *);
- int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
- int (*ptr_pthread_mutex_init) (pthread_mutex_t *,
- const pthread_mutexattr_t *);
- int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
- int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
- pthread_t (*ptr_pthread_self) (void);
- int (*ptr_pthread_setcancelstate) (int, int *);
- int (*ptr_pthread_setcanceltype) (int, int *);
- void (*ptr___pthread_cleanup_upto) (__jmp_buf, char *);
- int (*ptr___pthread_once) (pthread_once_t *, void (*) (void));
- int (*ptr___pthread_rwlock_rdlock) (pthread_rwlock_t *);
- int (*ptr___pthread_rwlock_wrlock) (pthread_rwlock_t *);
- int (*ptr___pthread_rwlock_unlock) (pthread_rwlock_t *);
- int (*ptr___pthread_key_create) (pthread_key_t *, void (*) (void *));
- void *(*ptr___pthread_getspecific) (pthread_key_t);
- int (*ptr___pthread_setspecific) (pthread_key_t, const void *);
- void (*ptr__pthread_cleanup_push_defer) (struct _pthread_cleanup_buffer *,
- void (*) (void *), void *);
- void (*ptr__pthread_cleanup_pop_restore) (struct _pthread_cleanup_buffer *,
- int);
-#define HAVE_PTR_NTHREADS
- unsigned int *ptr_nthreads;
- void (*ptr___pthread_unwind) (__pthread_unwind_buf_t *)
- __attribute ((noreturn)) __cleanup_fct_attribute;
- void (*ptr__nptl_deallocate_tsd) (void);
- int (*ptr__nptl_setxid) (struct xid_command *);
- void (*ptr_freeres) (void);
-};
-
-/* Variable in libc.so. */
-extern struct pthread_functions __libc_pthread_functions attribute_hidden;
-extern int __libc_pthread_functions_init attribute_hidden;
-
-# define PTHFCT_CALL(fct, params) \
- __libc_pthread_functions.fct params
-
-#endif /* pthread-functions.h */
diff --git a/libpthread/nptl/sysdeps/pthread/setxid.h b/libpthread/nptl/sysdeps/pthread/setxid.h
index 9331649e4..c2763cd68 100644
--- a/libpthread/nptl/sysdeps/pthread/setxid.h
+++ b/libpthread/nptl/sysdeps/pthread/setxid.h
@@ -32,15 +32,11 @@
# define INLINE_SETXID_SYSCALL(name, nr, args...) \
({ \
int __result; \
- if (__builtin_expect (__libc_pthread_functions_init, 0)) \
- { \
struct xid_command __cmd; \
__cmd.syscall_no = __NR_##name; \
__SETXID_##nr (__cmd, args); \
- __result = PTHFCT_CALL (ptr__nptl_setxid, (&__cmd)); \
+ __result = PTHFCT_CALL (__nptl_setxid, (&__cmd)); \
} \
- else \
- __result = INLINE_SYSCALL (name, nr, args); \
__result; \
})
#else
diff --git a/libpthread/nptl/sysdeps/pthread/uClibc-glue.h b/libpthread/nptl/sysdeps/pthread/uClibc-glue.h
index b957dedc9..46f8f878c 100644
--- a/libpthread/nptl/sysdeps/pthread/uClibc-glue.h
+++ b/libpthread/nptl/sysdeps/pthread/uClibc-glue.h
@@ -26,7 +26,6 @@
#define __read read
#define __close close
#define __on_exit on_exit
-#define __libc_current_sigrtmin_private __libc_current_sigrtmin
#define __clone clone
extern void *__libc_stack_end;