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authorUlrich Drepper <drepper@redhat.com>2003-10-05 19:33:05 +0000
committerUlrich Drepper <drepper@redhat.com>2003-10-05 19:33:05 +0000
commit083cb7587733b771119fe493bff0d01e8d9eddc1 (patch)
tree228af46a0023023355510d32086b3bb869dd4176 /sysdeps/ia64
parentc70a86b618e3e04dcccb7b970ab54da60a27937f (diff)
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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')
-rw-r--r--sysdeps/ia64/backtrace.c85
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)