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author | Andreas Jaeger <aj@suse.de> | 2012-03-19 21:04:21 +0100 |
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committer | Andreas Jaeger <aj@suse.de> | 2012-03-19 21:04:21 +0100 |
commit | c93ba106176a8b03a5c25f7d6fbb50524a9530cf (patch) | |
tree | 0c50c8452e4a3630d4935acab35e77b91b924124 /sysdeps/generic/backtracesymsfd.c | |
parent | 735095ae9566b2b14e8210e5ed44b3d5b51495f1 (diff) | |
download | glibc-c93ba106176a8b03a5c25f7d6fbb50524a9530cf.tar.gz glibc-c93ba106176a8b03a5c25f7d6fbb50524a9530cf.tar.xz glibc-c93ba106176a8b03a5c25f7d6fbb50524a9530cf.zip |
Move sysdeps/generic/elf/* to sysdeps/generic
Diffstat (limited to 'sysdeps/generic/backtracesymsfd.c')
-rw-r--r-- | sysdeps/generic/backtracesymsfd.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/sysdeps/generic/backtracesymsfd.c b/sysdeps/generic/backtracesymsfd.c new file mode 100644 index 0000000000..8b4a836ce9 --- /dev/null +++ b/sysdeps/generic/backtracesymsfd.c @@ -0,0 +1,125 @@ +/* Write formatted list with names for addresses in backtrace to a file. + Copyright (C) 1998,2000,2003,2005,2009,2011 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, see + <http://www.gnu.org/licenses/>. */ + +#include <execinfo.h> +#include <string.h> +#include <sys/uio.h> + +#include <stdio-common/_itoa.h> +#include <ldsodefs.h> + +#if __ELF_NATIVE_CLASS == 32 +# define WORD_WIDTH 8 +#else +/* We assume 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]; + char buf2[WORD_WIDTH]; + Dl_info info; + struct link_map *map; + size_t last = 0; + + if (_dl_addr (array[cnt], &info, &map, NULL) + && info.dli_fname != NULL && 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; + + if (info.dli_sname != NULL || map->l_addr != 0) + { + size_t diff; + + iov[last].iov_base = (void *) "("; + iov[last].iov_len = 1; + ++last; + + if (info.dli_sname != NULL) + { + /* We have a symbol name. */ + iov[last].iov_base = (void *) info.dli_sname; + iov[last].iov_len = strlen (info.dli_sname); + ++last; + } + else + /* We have no symbol, so describe it as relative to the file. + The load bias is more useful to the user than the load + address. The use of these addresses is to calculate an + address in the ELF file, so its prelinked bias is not + something we want to subtract out. */ + info.dli_saddr = (void *) map->l_addr; + + if (array[cnt] >= (void *) info.dli_saddr) + { + iov[last].iov_base = (void *) "+0x"; + diff = array[cnt] - info.dli_saddr; + } + else + { + iov[last].iov_base = (void *) "-0x"; + diff = info.dli_saddr - array[cnt]; + } + iov[last].iov_len = 3; + ++last; + + iov[last].iov_base = _itoa_word ((unsigned long int) diff, + &buf2[WORD_WIDTH], 16, 0); + iov[last].iov_len = (&buf2[WORD_WIDTH] + - (char *) iov[last].iov_base); + ++last; + + iov[last].iov_base = (void *) ")"; + iov[last].iov_len = 1; + ++last; + } + } + + 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) +libc_hidden_def (__backtrace_symbols_fd) |