From 67eff66438688fddebe41f77fd252a3b2b135271 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Mon, 3 Mar 2003 20:58:42 +0000 Subject: Initial effort at adding profiling support. --- libc/sysdeps/linux/common/gmon-start.c | 58 ++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 libc/sysdeps/linux/common/gmon-start.c (limited to 'libc/sysdeps/linux/common/gmon-start.c') diff --git a/libc/sysdeps/linux/common/gmon-start.c b/libc/sysdeps/linux/common/gmon-start.c new file mode 100644 index 000000000..6878a7a71 --- /dev/null +++ b/libc/sysdeps/linux/common/gmon-start.c @@ -0,0 +1,58 @@ +/* Code to enable profiling at program startup. + 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 2.1 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 +#include +#include +#include +#include + +#ifdef __UCLIBC_PROFILING__ + +/* Beginning and end of our code segment. We cannot declare them + as the external functions since we want the addresses of those + labels. Taking the address of a function may have different + meanings on different platforms. */ + +extern void _start; +extern void etext; + + +void __gmon_start__ (void) +{ +#ifdef __UCLIBC_CTOR_DTOR__ + /* Protect from being called more than once. Since crti.o is linked + into every shared library, each of their init functions will call us. */ + static int called; + + if (called) + return; + + called = 1; +#endif + + /* Start keeping profiling records. */ + monstartup ((u_long) &_start, (u_long) &etext); + + /* Call _mcleanup before exiting; it will write out gmon.out from the + collected data. */ + atexit (&_mcleanup); +} +#endif + -- cgit v1.2.3