diff options
Diffstat (limited to 'debug')
| -rw-r--r-- | debug/Makefile | 8 | ||||
| -rw-r--r-- | debug/noophooks.c | 25 | ||||
| -rw-r--r-- | debug/pcprofile.c | 75 |
3 files changed, 106 insertions, 2 deletions
diff --git a/debug/Makefile b/debug/Makefile index 9c094c4222..d13be3d684 100644 --- a/debug/Makefile +++ b/debug/Makefile @@ -24,18 +24,21 @@ subdir := debug headers := execinfo.h distribute = sigcontextinfo.h register-dump.h -routines := backtrace backtracesyms backtracesymsfd +routines := backtrace backtracesyms backtracesymsfd noophooks CFLAGS-backtrace.c = -fno-omit-frame-pointer tests = backtrace-tst -extra-libs = libSegFault +extra-libs = libSegFault libpcprofile extra-libs-others = $(extra-libs) libSegFault-routines = segfault libSegFault-inhibit-o = $(filter-out .os,$(object-suffixes)) +libpcprofile-routines = pcprofile +libpcprofile-inhibit-o = $(filter-out .os,$(object-suffixes)) + include ../Makeconfig distribute += catchsegv.sh @@ -58,3 +61,4 @@ $(objpfx)catchsegv: catchsegv.sh $(common-objpfx)soversions.mk \ # This ensures they will load libc.so for needed symbols if loaded by # a statically-linked program that hasn't already loaded it. $(objpfx)libSegFault.so: $(common-objpfx)libc.so $(common-objpfx)elf/ld.so +$(objpfx)libpcprofile.so: $(common-objpfx)libc.so $(common-objpfx)elf/ld.so diff --git a/debug/noophooks.c b/debug/noophooks.c new file mode 100644 index 0000000000..5c1ae01960 --- /dev/null +++ b/debug/noophooks.c @@ -0,0 +1,25 @@ +/* Noop hooks for the instrumenting functions. + Copyright (C) 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +void +__cyg_profile_func_enter (void *this_fn, void *call_site) +{ +} +strong_alias (__cyg_profile_func_enter, __cyg_profile_func_exit) diff --git a/debug/pcprofile.c b/debug/pcprofile.c new file mode 100644 index 0000000000..b5dc4e709c --- /dev/null +++ b/debug/pcprofile.c @@ -0,0 +1,75 @@ +/* Profile PC and write result to FIFO. + Copyright (C) 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fcntl.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); + + if (fd != -1) + active = 1; + } +} + + +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) |