diff options
Diffstat (limited to 'sysdeps/generic/elf/backtracesymsfd.c')
| -rw-r--r-- | sysdeps/generic/elf/backtracesymsfd.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/sysdeps/generic/elf/backtracesymsfd.c b/sysdeps/generic/elf/backtracesymsfd.c new file mode 100644 index 0000000000..b67b64529e --- /dev/null +++ b/sysdeps/generic/elf/backtracesymsfd.c @@ -0,0 +1,109 @@ +/* Write formatted list with names for addresses in backtrace to a file. + Copyright (C) 1998 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 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 <string.h> +#include <sys/uio.h> + +#include <stdio-common/_itoa.h> +#include <elf/ldsodefs.h> + +#if __ELF_NATIVE_CLASS == 32 +# define WORD_WIDTH 8 +#else +/* We assyme 64bits. */ +# define WORD_WIDTH 16 +#endif + + +void +__backtrace_symbols_fd (array, size, fd) + void *const *array; + int size; + int fd; +{ + struct iovec iov[9]; + int cnt; + + for (cnt = 0; cnt < size; ++cnt) + { + char buf[WORD_WIDTH]; + Dl_info info; + size_t last = 0; + + if (_dl_addr (array[cnt], &info) + && info.dli_fname && info.dli_fname[0] != '\0') + { + /* Name of the file. */ + iov[0].iov_base = (void *) info.dli_fname; + iov[0].iov_len = strlen (info.dli_fname); + last = 1; + + /* Symbol name. */ + if (info.dli_sname != NULL) + { + char buf2[WORD_WIDTH]; + size_t diff; + + iov[1].iov_base = (void *) "("; + iov[1].iov_len = 1; + iov[2].iov_base = (void *) info.dli_sname; + iov[2].iov_len = strlen (info.dli_sname); + + if (array[cnt] >= (void *) info.dli_saddr) + { + iov[3].iov_base = (void *) "+0x"; + diff = array[cnt] - info.dli_saddr; + } + else + { + iov[3].iov_base = (void *) "-0x"; + diff = info.dli_saddr - array[cnt]; + } + iov[3].iov_len = 3; + + iov[4].iov_base = _itoa_word ((unsigned long int) diff, + &buf2[WORD_WIDTH], 16, 0); + iov[4].iov_len = &buf2[WORD_WIDTH] - (char *) iov[4].iov_base; + + iov[5].iov_base = (void *) ")"; + iov[5].iov_len = 1; + + last = 6; + } + } + + iov[last].iov_base = (void *) "[0x"; + iov[last].iov_len = 3; + ++last; + + iov[last].iov_base = _itoa_word ((unsigned long int) array[cnt], + &buf[WORD_WIDTH], 16, 0); + iov[last].iov_len = &buf[WORD_WIDTH] - (char *) iov[last].iov_base; + ++last; + + iov[last].iov_base = (void *) "]\n"; + iov[last].iov_len = 2; + ++last; + + __writev (fd, iov, last); + } +} +weak_alias (__backtrace_symbols_fd, backtrace_symbols_fd) |