mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
0e66ade5ad
* sysdeps/posix/posix_fallocate64.c: Likewise. * include/string.h: Use libc_hidden_proto for strnlen. * sysdeps/generic/strnlen.c: Add libc_hidden_def. * include/libintl.h: Use libc_hidden_proto for __dcgettext. * intl/dcgettext.c: Add libc_hidden_def. * include/execinfo.h: Add libc_hidden_proto for __backtrace and __backtrace_symbols_fd. * sysdeps/generic/backtrace.c: Add libc_hidden_def. * sysdeps/generic/backtracesymsfd.c: Likewise. * sysdeps/generic/elf/backtracesymsfd.c: Likewise. * sysdeps/i386/backtrace.c: Likewise. * sysdeps/ia64/backtrace.c: Likewise. * sysdeps/powerpc/powerpc32/backtrace.c: Likewise. * sysdeps/powerpc/powerpc64/backtrace.c: Likewise. * sysdeps/s390/s390-32/backtrace.c: Likewise. * sysdeps/s390/s390-64/backtrace.c: Likewise.
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* Return backtrace of current program state.
|
|
Copyright (C) 1998, 2000, 2005 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 <execinfo.h>
|
|
#include <stddef.h>
|
|
#include <bp-checks.h>
|
|
|
|
/* This is the stack layout we see with every stack frame.
|
|
Note that every routine is required by the ABI to lay out the stack
|
|
like this.
|
|
|
|
+----------------+ +-----------------+
|
|
%r1 -> | %r1 last frame--------> | %r1 last frame--->... --> NULL
|
|
| | | |
|
|
| (unused) | | return address |
|
|
+----------------+ +-----------------+
|
|
*/
|
|
struct layout
|
|
{
|
|
struct layout *__unbounded next;
|
|
void *__unbounded return_address;
|
|
};
|
|
|
|
int
|
|
__backtrace (void **array, int size)
|
|
{
|
|
struct layout *current;
|
|
int count;
|
|
|
|
/* Force gcc to spill LR. */
|
|
asm volatile ("" : "=l"(current));
|
|
|
|
/* Get the address on top-of-stack. */
|
|
asm volatile ("lwz %0,0(1)" : "=r"(current));
|
|
current = BOUNDED_1 (current);
|
|
|
|
for ( count = 0;
|
|
current != NULL && count < size;
|
|
current = BOUNDED_1 (current->next), count++)
|
|
array[count] = current->return_address;
|
|
|
|
/* It's possible the second-last stack frame can't return
|
|
(that is, it's __libc_start_main), in which case
|
|
the CRT startup code will have set its LR to 'NULL'. */
|
|
if (count > 0 && array[count-1] == NULL)
|
|
count--;
|
|
|
|
return count;
|
|
}
|
|
weak_alias (__backtrace, backtrace)
|
|
libc_hidden_def (__backtrace)
|