From 87843f15168b086d3f6d255ebfe311e314560004 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sun, 8 Aug 1999 22:20:38 +0000 Subject: Update. 1999-08-08 Ulrich Drepper * string/bits/string2.h: Mark void* operations as extensions. * sysdeps/i386/i486/bits/string.h: Likewise. * debug/Makefile (routines): Add noophooks. (extra-libs): Add libpcprofile. Add rules to build libpcprofile. * debug/noophooks.c: New file. * debug/pcprofile.c: New file. --- debug/pcprofile.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 debug/pcprofile.c (limited to 'debug/pcprofile.c') diff --git a/debug/pcprofile.c b/debug/pcprofile.c new file mode 100644 index 0000000..b5dc4e7 --- /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 , 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 +#include +#include + +/* 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) -- cgit v1.1