mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 19:40:06 +00:00
542493f93c
2000-01-05 Philip Blundell <philb@gnu.org> * sysdeps/arm/frame.h: New file. * sysdeps/generic/frame.h: Likewise. * sysdeps/generic/segfault.c (struct layout): Delete definition; include the above file instead. * sysdeps/generic/backtrace.c (struct layout): Likewise. (__backtrace): Use ADVANCE_STACK_FRAME. * sysdeps/unix/sysv/linux/arm/sigcontextinfo.h (ADVANCE_STACK_FRAME): New macro. (GET_FRAME): Apply above to returned value. * sysdeps/unix/sysv/linux/arm/bits/armsigctx.h: Add `fault_address'.
91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/* Return backtrace of current program state. Generic version.
|
|
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>
|
|
#include <frame.h>
|
|
#include <sigcontextinfo.h>
|
|
|
|
/* This is a global variable set at program start time. It marks the
|
|
highest used stack address. */
|
|
extern void *__libc_stack_end;
|
|
|
|
|
|
/* This implementation assumes a stack layout that matches the defaults
|
|
used by gcc's `__builtin_frame_address' and `__builtin_return_address'
|
|
(FP is the frame pointer register):
|
|
|
|
+-----------------+ +-----------------+
|
|
FP -> | previous FP --------> | previous FP ------>...
|
|
| | | |
|
|
| return address | | return address |
|
|
+-----------------+ +-----------------+
|
|
|
|
*/
|
|
|
|
/* Get some notion of the current stack. Need not be exactly the top
|
|
of the stack, just something somewhere in the current frame. */
|
|
#ifndef CURRENT_STACK_FRAME
|
|
# define CURRENT_STACK_FRAME ({ char __csf; &__csf; })
|
|
#endif
|
|
|
|
/* By default we assume that the stack grows downward. */
|
|
#ifndef INNER_THAN
|
|
# define INNER_THAN <
|
|
#endif
|
|
|
|
/* By default assume the `next' pointer in struct layout points to the
|
|
next struct layout. */
|
|
#ifndef ADVANCE_STACK_FRAME
|
|
# define ADVANCE_STACK_FRAME(next) ((struct layout *) (next))
|
|
#endif
|
|
|
|
int
|
|
__backtrace (array, size)
|
|
void **array;
|
|
int size;
|
|
{
|
|
struct layout *current;
|
|
void *top_frame;
|
|
void *top_stack;
|
|
int cnt = 0;
|
|
|
|
top_frame = __builtin_frame_address (0);
|
|
top_stack = CURRENT_STACK_FRAME;
|
|
|
|
/* We skip the call to this function, it makes no sense to record it. */
|
|
current = (struct layout *) top_frame;
|
|
while (cnt < size)
|
|
{
|
|
if ((void *) current INNER_THAN top_stack
|
|
|| !((void *) current INNER_THAN __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 = ADVANCE_STACK_FRAME (current->next);
|
|
}
|
|
|
|
return cnt;
|
|
}
|
|
weak_alias (__backtrace, backtrace)
|