mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-05 21:00:05 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* Return backtrace of current program state.
|
|
Copyright (C) 1998, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
|
|
|
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 <execinfo.h>
|
|
#include <bp-checks.h>
|
|
|
|
|
|
/* This is a global variable set at program start time. It marks the
|
|
highest used stack address. */
|
|
extern void *__libc_stack_end;
|
|
|
|
|
|
/* This is the stack alyout we see with every stack frame.
|
|
|
|
+-----------------+ +-----------------+
|
|
%ebp -> | %ebp last frame--------> | %ebp last frame--->...
|
|
| | | |
|
|
| return address | | return address |
|
|
+-----------------+ +-----------------+
|
|
*/
|
|
struct layout
|
|
{
|
|
struct layout *__unbounded next;
|
|
void *__unbounded return_address;
|
|
};
|
|
|
|
int
|
|
__backtrace (array, size)
|
|
void **array;
|
|
int size;
|
|
{
|
|
/* We assume that all the code is generated with frame pointers set. */
|
|
register void *ebp __asm__ ("ebp");
|
|
register void *esp __asm__ ("esp");
|
|
struct layout *current;
|
|
int cnt = 0;
|
|
|
|
/* We skip the call to this function, it makes no sense to record it. */
|
|
current = BOUNDED_1 ((struct layout *) ebp);
|
|
while (cnt < size)
|
|
{
|
|
if ((void *) current < esp || (void *) current > __libc_stack_end)
|
|
/* This means the address is out of range. Note that for the
|
|
toplevel we see a frame pointer with value NULL which clearly is
|
|
out of range. */
|
|
break;
|
|
|
|
array[cnt++] = current->return_address;
|
|
|
|
current = current->next;
|
|
}
|
|
|
|
return cnt;
|
|
}
|
|
weak_alias (__backtrace, backtrace)
|