mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 08:30:00 +00:00
41d998a683
2000-07-29 Greg McGary <greg@mcgary.org> * Rules (test-bp-inputs, make-test-out): New variables. ($(objpfx)%-bp.out): New rule. ($(objpfx)%.out): Rewrite in terms of new variables. * libio/iovswscanf.c (vswscanf): Pass _IO_FILE_plus pointer to internal function that uses vtable. * libio/vsnprintf.c (_IO_vsnprintf): Likewise. * libio/vswprintf.c (_IO_vswprintf): Likewise. * malloc/malloc.c (mem2chunk): Define in terms of chunk_at_offset. (malloc_extend_top): Convert brk to chunk using chunk_at_offset. (chunk_align): Likewise. * time/asctime.c (ab_day_name, ab_month_name): Rewrite expression in a way that conforms to decl, and avoids spurious bounds violation. * sysdeps/arm/frame.h (struct layout): Make pointers __unbounded. * sysdeps/generic/frame.h: Likewise. * sysdeps/generic/backtrace.c (ADVANCE_STACK_FRAME): Wrap bounds around return value. (__backtrace): Qualify frame-pointer chain and return address pointers as __unbounded. Wrap bounds around variable `current'. * sysdeps/generic/segfault.c (ADVANCE_STACK_FRAME): Wrap bounds around return value. (catch_segfault): Qualify frame-pointer chain and return address pointers as __unbounded. Wrap bounds around variable `current'. * sysdeps/i386/backtrace.c (struct layout): Make pointers __unbounded. (ADVANCE_STACK_FRAME): Wrap bounds around return value. * sysdeps/powerpc/backtrace.c (struct layout): Make pointers __unbounded. (__backtrace): Qualify frame-pointer chain and return address pointers as __unbounded. Wrap bounds around variable `current'. * sysdeps/i386/addmul_1.S: s2_limb is scalar so remove bounds check. * sysdeps/i386/mul_1.S: Likewise. * sysdeps/i386/submul_1.S: Likewise. * sysdeps/i386/i586/addmul_1.S: Likewise. * sysdeps/i386/i586/mul_1.S: Add bounds checks. * sysdeps/i386/i586/submul_1.S: Likewise.
67 lines
2.2 KiB
C
67 lines
2.2 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.
|
|
|
|
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 <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)
|