diff options
Diffstat (limited to 'libc/sysdeps/linux/common')
| -rw-r--r-- | libc/sysdeps/linux/common/Makefile | 3 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/noophooks.c | 26 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/pcprofile.c | 91 |
3 files changed, 120 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile index 1930351fb..5e40870a2 100644 --- a/libc/sysdeps/linux/common/Makefile +++ b/libc/sysdeps/linux/common/Makefile @@ -57,6 +57,9 @@ CSRC= __rt_sigtimedwait.c __socketcall.c __syscall_fcntl.c \ ifneq ($(strip $(EXCLUDE_BRK)),y) CSRC+=sbrk.c endif +ifeq ($(strip $(UCLIBC_PROFILING)),y) +CSRC+=noophooks.c pcprofile.c +endif ifeq ($(strip $(UCLIBC_PROPOLICE)),y) CSRC+=ssp.c endif diff --git a/libc/sysdeps/linux/common/noophooks.c b/libc/sysdeps/linux/common/noophooks.c new file mode 100644 index 000000000..65e9fdd15 --- /dev/null +++ b/libc/sysdeps/linux/common/noophooks.c @@ -0,0 +1,26 @@ +/* Noop hooks for the instrumenting functions. + Copyright (C) 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <features.h> + +void __cyg_profile_func_enter (void *this_fn, void *call_site) +{ +} +strong_alias (__cyg_profile_func_enter, __cyg_profile_func_exit) diff --git a/libc/sysdeps/linux/common/pcprofile.c b/libc/sysdeps/linux/common/pcprofile.c new file mode 100644 index 000000000..d5a9601b4 --- /dev/null +++ b/libc/sysdeps/linux/common/pcprofile.c @@ -0,0 +1,91 @@ +/* Profile PC and write result to FIFO. + Copyright (C) 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define _GNU_SOURCE +#include <features.h> +#include <errno.h> +#include <fcntl.h> +#include <stdint.h> +#include <stdlib.h> +#include <unistd.h> + +/* Nonzero if we are actually doing something. */ +static int active; + +/* The file descriptor of the FIFO. */ +static int fd; + + +static void __attribute__ ((constructor)) +install (void) +{ + /* See whether the environment variable `PCPROFILE_OUTPUT' is defined. + If yes, it should name a FIFO. We open it and mark ourself as active. */ + const char *outfile = getenv ("PCPROFILE_OUTPUT"); + + if (outfile != NULL && *outfile != '\0') + { + fd = open (outfile, O_RDWR | O_CREAT, 0666); + + if (fd != -1) + { + uint32_t word; + + active = 1; + + /* Write a magic word which tells the reader about the byte + order and the size of the following entries. */ + word = 0xdeb00000 | sizeof (void *); + if (TEMP_FAILURE_RETRY (write (fd, &word, 4)) != 4) + { + /* If even this fails we shouldn't try further. */ + close (fd); + fd = -1; + active = 0; + } + } + } +} + + +static void __attribute__ ((destructor)) +uninstall (void) +{ + if (active) + close (fd); +} + + +void __cyg_profile_func_enter (void *this_fn, void *call_site) +{ + void *buf[2]; + + if (! active) + return; + + /* Now write out the current position and that of the caller. We do + this now, and don't cache the because we want real-time output. */ + buf[0] = this_fn; + buf[1] = call_site; + + write (fd, buf, sizeof buf); +} +/* We don't handle entry and exit differently here. */ +strong_alias (__cyg_profile_func_enter, __cyg_profile_func_exit) |