mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-21 02:10:05 +00:00
dfab448bd8
1998-06-18 21:45 Ulrich Drepper <drepper@cygnus.com> * signal/signal.h: Add prototype for __sigaltstack. * sysdeps/unix/sysv/linux/syscalls.list: Add __sigaltstack name. Remove sigstack entry. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add sigstack here. * sysdeps/unix/sysv/linux/sigstack.c: New file. * sysdeps/i386/backtrace.c: Add casts.
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/* Return backtrace of current program state.
|
|
Copyright (C) 1998 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 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 <execinfo.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 *next;
|
|
void *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 = (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)
|