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author | Ulrich Drepper <drepper@redhat.com> | 2003-10-05 19:33:05 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-10-05 19:33:05 +0000 |
commit | 083cb7587733b771119fe493bff0d01e8d9eddc1 (patch) | |
tree | 228af46a0023023355510d32086b3bb869dd4176 /sysdeps/ia64/backtrace.c | |
parent | c70a86b618e3e04dcccb7b970ab54da60a27937f (diff) | |
download | glibc-083cb7587733b771119fe493bff0d01e8d9eddc1.tar.gz glibc-083cb7587733b771119fe493bff0d01e8d9eddc1.tar.xz glibc-083cb7587733b771119fe493bff0d01e8d9eddc1.zip |
Update.
2003-10-05 Jakub Jelinek <jakub@redhat.com> * sysdeps/ia64/backtrace.c: New file. * sysdeps/x86_64/backtrace.c: New file. * sysdeps/generic/unwind.h (_Unwind_Trace_Fn): New type. (_Unwind_Backtrace): New prototype.
Diffstat (limited to 'sysdeps/ia64/backtrace.c')
-rw-r--r-- | sysdeps/ia64/backtrace.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sysdeps/ia64/backtrace.c b/sysdeps/ia64/backtrace.c new file mode 100644 index 0000000000..d9daf0f54a --- /dev/null +++ b/sysdeps/ia64/backtrace.c @@ -0,0 +1,85 @@ +/* Return backtrace of current program state. + Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <bits/libc-lock.h> +#include <dlfcn.h> +#include <execinfo.h> +#include <stdlib.h> +#include <unwind.h> + +struct trace_arg +{ + void **array; + int cnt, size; +}; + +static _Unwind_Reason_Code (*unwind_backtrace) (_Unwind_Trace_Fn, void *); +static _Unwind_Ptr (*unwind_getip) (struct _Unwind_Context *); + +static void +init (void) +{ + void *handle = __libc_dlopen ("libgcc_s.so.1"); + + if (handle == NULL) + return; + + unwind_backtrace = __libc_dlsym (handle, "_Unwind_Backtrace"); + unwind_getip = __libc_dlsym (handle, "_Unwind_GetIP"); + if (unwind_getip == NULL) + unwind_backtrace = NULL; +} + +static _Unwind_Reason_Code +backtrace_helper (struct _Unwind_Context *ctx, void *a) +{ + struct trace_arg *arg = a; + + /* We are first called with address in the __backtrace function. + Skip it. */ + if (arg->cnt != -1) + arg->array[arg->cnt] = (void *) unwind_getip (ctx); + if (++arg->cnt == arg->size) + return _URC_END_OF_STACK; + return _URC_NO_REASON; +} + +int +__backtrace (array, size) + void **array; + int size; +{ + struct trace_arg arg = { .array = array, .size = size, .cnt = -1 }; + __libc_once_define (static, once); + + __libc_once (once, init); + if (unwind_backtrace == NULL) + return 0; + + if (size >= 1) + unwind_backtrace (backtrace_helper, &arg); + + /* _Unwind_Backtrace on IA-64 seems to put NULL address above + _start. Fix it up here. */ + if (arg.cnt > 1 && arg.array[arg.cnt - 1] == NULL) + --arg.cnt; + return arg.cnt != -1 ? arg.cnt : 0; +} +weak_alias (__backtrace, backtrace) |