sysdeps/generic/backtracesymsfd.c

   1 /* Write formatted list with names for addresses in backtrace to a file.
   2    Copyright (C) 1998 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <execinfo.h>
  22 #include <string.h>
  23 #include <sys/uio.h>
  24
  25 #include <stdio-common/_itoa.h>
  26
  27 #if __ELF_NATIVE_CLASS == 32
  28 # define WORD_WIDTH 8
  29 #else
  30 /* We assyme 64bits.  */
  31 # define WORD_WIDTH 16
  32 #endif
  33
  34
  35 void
  36 __backtrace_symbols_fd (array, size, fd)
  37      void *const *array;
  38      int size;
  39      int fd;
  40 {
  41   struct iovec iov[3];
  42   int cnt;
  43
  44   for (cnt = 0; cnt < size; ++cnt)
  45     {
  46       char buf[WORD_WIDTH];
  47
  48       iov[0].iov_base = (void *) "[0x";
  49       iov[0].iov_len = 3;
  50
  51       iov[1].iov_base = _itoa_word ((unsigned long int) array[cnt],
  52                                     &buf[WORD_WIDTH], 16, 0);
  53       iov[1].iov_len = &buf[WORD_WIDTH] - (char *) iov[1].iov_base;
  54
  55       iov[2].iov_base = (void *) "]\n";
  56       iov[2].iov_len = 2;
  57
  58       __writev (fd, iov, 3);
  59     }
  60 }
  61 weak_alias (__backtrace_symbols_fd, backtrace_symbols_fd)