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1998-06-08 18:57 Ulrich Drepper <drepper@cygnus.com> * Makeconfig (subdirs): Add debug. * configure.in: Use sysdeps/generic/elf subdir if ELF platform. * libc.map: Add __backtrace, __backtrace_symbols, backtrace and backtrace_symbols. * sysdeps/generic/backtrace.c: New file. * sysdeps/generic/backtracesyms.c: New file. * sysdeps/generic/elf/backtracesyms.c: New file. * sysdeps/i386/backtrace.c: New file. * debug/Makefile: New file. * debug/backtrace-tst.c: New file. * debug/execinfo.h: New file.
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* Return list with names for address in backtrace.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <execinfo.h>
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#include <stdlib.h>
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#include <string.h>
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/* Assume the worst for the width of an address. */
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#define WORD_WIDTH 16
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char **
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__backtrace_symbols (array, size)
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const void **array;
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int size;
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{
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int cnt;
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size_t total = 0;
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const char **result;
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/* We can compute the text size needed for the symbols since we print
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them all as "[%<addr>]". */
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total = size * (WORD_WIDTH + 3);
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/* Allocate memory for the result. */
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result = malloc (size * sizeof (char *) + total);
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if (result != NULL)
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{
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char *last = (char *) (result + size);
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for (cnt = 0; cnt < size; ++cnt)
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{
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result[cnt] = last;
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last += 1 + sprintf (last, "[+%p]", array[cnt]);
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}
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}
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return result;
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}
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weak_alias (__backtrace_symbols, backtrace_symbols)
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