diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/generic/backtrace.c | 34 | ||||
| -rw-r--r-- | sysdeps/generic/backtracesyms.c | 58 | ||||
| -rw-r--r-- | sysdeps/generic/elf/backtracesyms.c | 88 | ||||
| -rw-r--r-- | sysdeps/i386/backtrace.c | 63 |
4 files changed, 243 insertions, 0 deletions
diff --git a/sysdeps/generic/backtrace.c b/sysdeps/generic/backtrace.c new file mode 100644 index 0000000000..26bf9d41cf --- /dev/null +++ b/sysdeps/generic/backtrace.c @@ -0,0 +1,34 @@ +/* Return backtrace of current program state. + 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> + + +int +__backtrace (array, size) + void **array; + int size; +{ + /* We don't generally have the possibility to determine the stack + trace. Even gcc's `__builtin_return_address' feature cannot help + since it requires a constant argument. */ + return 0; +} +weak_alias (__backtrace, backtrace) diff --git a/sysdeps/generic/backtracesyms.c b/sysdeps/generic/backtracesyms.c new file mode 100644 index 0000000000..36bd39caaf --- /dev/null +++ b/sysdeps/generic/backtracesyms.c @@ -0,0 +1,58 @@ +/* Return list with names for address in backtrace. + 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 <stdlib.h> +#include <string.h> + + +/* Assume the worst for the width of an address. */ +#define WORD_WIDTH 16 + + +char ** +__backtrace_symbols (array, size) + const void **array; + int size; +{ + int cnt; + size_t total = 0; + const char **result; + + /* We can compute the text size needed for the symbols since we print + them all as "[%<addr>]". */ + total = size * (WORD_WIDTH + 3); + + /* Allocate memory for the result. */ + result = malloc (size * sizeof (char *) + total); + if (result != NULL) + { + char *last = (char *) (result + size); + + for (cnt = 0; cnt < size; ++cnt) + { + result[cnt] = last; + last += 1 + sprintf (last, "[+%p]", array[cnt]); + } + } + + return result; +} +weak_alias (__backtrace_symbols, backtrace_symbols) diff --git a/sysdeps/generic/elf/backtracesyms.c b/sysdeps/generic/elf/backtracesyms.c new file mode 100644 index 0000000000..11a65ea267 --- /dev/null +++ b/sysdeps/generic/elf/backtracesyms.c @@ -0,0 +1,88 @@ +/* Return list with names for address in backtrace. + 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 <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <elf/ldsodefs.h> + +#if __ELF_NATIVE_CLASS == 32 +# define WORD_WIDTH 8 +#else +/* We assyme 64bits. */ +# define WORD_WIDTH 16 +#endif + + +char ** +__backtrace_symbols (array, size) + const void **array; + int size; +{ + Dl_info info[size]; + int status[size]; + int cnt; + size_t total = 0; + char **result; + + /* Fill in the information we can get from `dladdr'. */ + for (cnt = 0; cnt < size; ++cnt) + { + status[cnt] = _dl_addr (array[cnt], &info[cnt]); + if (status[cnt] && info[cnt].dli_fname && info[cnt].dli_fname[0] != '\0') + /* We have some info, compute the length of the string which will be + "<fct-name>(<sym-name>)[+offset]. */ + total += (strlen (info[cnt].dli_fname ?: "") + + (info[cnt].dli_sname + ? strlen (info[cnt].dli_sname) + 2 + : 0) + + WORD_WIDTH + 6); + else + total += 6 + WORD_WIDTH; + } + + /* Allocate memory for the result. */ + result = malloc (size * sizeof (char *) + total); + if (result != NULL) + { + char *last = (char *) (result + size); + + for (cnt = 0; cnt < size; ++cnt) + { + result[cnt] = last; + + if (status[cnt] && info[cnt].dli_fname + && info[cnt].dli_fname[0] != '\0') + last += 1 + sprintf (last, "%s%s%s%s[+%p]", + info[cnt].dli_fname ?: "", + info[cnt].dli_sname ? "(" : "", + info[cnt].dli_sname ?: "", + info[cnt].dli_sname ? ") " : " ", + info[cnt].dli_fbase); + else + last += 1 + sprintf (last, "[+%p]", array[cnt]); + } + } + + return result; +} +weak_alias (__backtrace_symbols, backtrace_symbols) diff --git a/sysdeps/i386/backtrace.c b/sysdeps/i386/backtrace.c new file mode 100644 index 0000000000..0d484c7723 --- /dev/null +++ b/sysdeps/i386/backtrace.c @@ -0,0 +1,63 @@ +/* Return backtrace of current program state. + 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> + + +/* This is the stack alyout we see with every stack frame. + + +-----------------+ +-----------------+ + %ebp -> | %ebp last frame--------> | %ebp last frame--->... + | | | | + | return address | | return address | + +-----------------+ +-----------------+ +*/ +struct layout +{ + struct layout *next; + void *return_address; +}; + +int +__backtrace (array, size) + void **array; + int size; +{ + /* We assume that all the code is generated with frame pointers set. */ + register void *ebp __asm__ ("ebp"); + struct layout *current; + int cnt = 0; + + /* We skip the call to this function, it makes no sense to record it. */ + current = (struct layout *) ebp; + while (cnt < size) + { + if (current == NULL) + /* This means the toplevel is reached. */ + break; + + array[cnt++] = current->return_address; + + current = current->next; + } + + return cnt; +} +weak_alias (__backtrace, backtrace) |