glibc/sysdeps/generic/backtrace.c

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/* Return backtrace of current program state. Generic version.
Update. 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.
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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>
Update. 2000-01-12 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_32BITUIDS): Added for Linux 2.3.39+. * sysdeps/unix/sysv/linux/getresgid.c: Support 32bit UIDs and 32bit GIDs. * sysdeps/unix/sysv/linux/getresuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/chown.c: Likewise. * sysdeps/unix/sysv/linux/i386/getgroups.c: Likewise. * sysdeps/unix/sysv/linux/i386/setegid.c: Likewise. * sysdeps/unix/sysv/linux/i386/seteuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setfsgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setfsuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setgroups.c: Likewise. * sysdeps/unix/sysv/linux/i386/setregid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setresgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setresuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setreuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setuid.c: Likewise. * sysdeps/unix/sysv/linux/setegid.c: Likewise. * sysdeps/unix/sysv/linux/arm/chown.c: New file. * sysdeps/unix/sysv/linux/arm/fchown.c: New file. * sysdeps/unix/sysv/linux/arm/geteuid.c: New file. * sysdeps/unix/sysv/linux/arm/getegid.c: New file. * sysdeps/unix/sysv/linux/arm/getuid.c: New file. * sysdeps/unix/sysv/linux/arm/getgid.c: New file. * sysdeps/unix/sysv/linux/arm/lchown.c: New file. * sysdeps/unix/sysv/linux/i386/fchown.c: New file. * sysdeps/unix/sysv/linux/i386/getegid.c: New file. * sysdeps/unix/sysv/linux/i386/geteuid.c: New file. * sysdeps/unix/sysv/linux/i386/getgid.c: New file. * sysdeps/unix/sysv/linux/i386/getuid.c: New file. * sysdeps/unix/sysv/linux/i386/lchown.c: New file. * sysdeps/unix/sysv/linux/m68k/chown.c: New file. * sysdeps/unix/sysv/linux/m68k/fchown.c: New file. * sysdeps/unix/sysv/linux/m68k/getegid.c: New file. * sysdeps/unix/sysv/linux/m68k/geteuid.c: New file. * sysdeps/unix/sysv/linux/m68k/getgid.c: New file. * sysdeps/unix/sysv/linux/m68k/getuid.c: New file. * sysdeps/unix/sysv/linux/m68k/lchown.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/chown.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/fchown.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/getegid.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/geteuid.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/getgid.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/getuid.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/lchown.c: New file. Based on a patch by Chris Wing <wingc@engin.umich.edu>. 2000-01-14 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/sparc/sys/procfs.h: New file. 2000-01-13 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/backtrace.c: Include signal.h which sigcontextinfo.h headers are used to expect. * sysdeps/unix/sysv/linux/sparc/sparc32/register-dump.h (register_dump): Fix a typo in the printout. Avoid using reg_window, so that asm/ptrace.h is not necessary. * sysdeps/unix/sysv/linux/sparc/sparc32/sigcontextinfo.h (ADVANCE_STACK_FRAME): Likewise. * stdlib/longlong.h: Avoid using __sparc_v9__ ifdefs. * sysdeps/sparc/sparc32/bits/wordsize.h: Likewise. * sysdeps/sparc/sparc64/bits/wordsize.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/fcntl.h: Include bits/wordsize.h to make it clear this file depends on __WORDSIZE. * sysdeps/unix/sysv/linux/ftruncate64.c (__have_no_truncate64): Renamed from have_no_truncate64. * sysdeps/unix/sysv/linux/truncate64.c (__have_no_truncate64): Likewise.
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#include <signal.h>
#include <frame.h>
#include <sigcontextinfo.h>
Update. 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.
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#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 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
Update. 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.
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# define ADVANCE_STACK_FRAME(next) BOUNDED_1 ((struct layout *) (next))
#endif
int
__backtrace (array, size)
void **array;
int size;
{
struct layout *current;
Update. 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.
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void *__unbounded top_frame;
void *__unbounded 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. */
Update. 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.
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current = BOUNDED_1 ((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)