summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/util/u_debug_stack.c
diff options
context:
space:
mode:
authorJosé Fonseca <jfonseca@vmware.com>2009-02-20 11:35:23 +0000
committerJosé Fonseca <jfonseca@vmware.com>2009-02-20 11:54:18 +0000
commitee4e4a6b964a3a91fcb922d4e82abff62da39102 (patch)
tree76a8593cc93253ce2c84e01db31e5a486bde99ed /src/gallium/auxiliary/util/u_debug_stack.c
parentd67bd60ecf13331ec5aa12bdb88b35f44dccdeb0 (diff)
util: Stack backtracing facilities.
Not much useful until we have symbol lookup.
Diffstat (limited to 'src/gallium/auxiliary/util/u_debug_stack.c')
-rw-r--r--src/gallium/auxiliary/util/u_debug_stack.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_debug_stack.c b/src/gallium/auxiliary/util/u_debug_stack.c
new file mode 100644
index 0000000000..76068a6509
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_debug_stack.c
@@ -0,0 +1,97 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Stack backtracing.
+ *
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
+#include "u_debug.h"
+#include "u_debug_stack.h"
+
+
+void
+debug_backtrace_capture(struct debug_stack_frame *backtrace,
+ unsigned start_frame,
+ unsigned nr_frames)
+{
+ const void **frame_pointer = NULL;
+ unsigned i = 0;
+
+ if(!nr_frames)
+ return;
+
+#if defined(PIPE_CC_GCC)
+ frame_pointer = ((const void **)__builtin_frame_address(1));
+#elif defined(PIPE_CC_MSVC)
+ __asm {
+ mov frame_pointer, ebp
+ }
+ frame_pointer = (const void **)frame_pointer[0];
+#else
+ frame_pointer = NULL;
+#endif
+
+
+#ifdef PIPE_ARCH_X86
+ while(nr_frames) {
+ if(!frame_pointer)
+ break;
+
+ if(start_frame)
+ --start_frame;
+ else {
+ backtrace[i++].function = frame_pointer[1];
+ --nr_frames;
+ }
+
+ frame_pointer = (const void **)frame_pointer[0];
+ }
+#endif
+
+ while(nr_frames) {
+ backtrace[i++].function = NULL;
+ --nr_frames;
+ }
+}
+
+
+void
+debug_backtrace_dump(const struct debug_stack_frame *backtrace,
+ unsigned nr_frames)
+{
+ unsigned i;
+
+ for(i = 0; i < nr_frames; ++i) {
+ if(!backtrace[i].function)
+ break;
+ debug_printf("\t%p\n", backtrace[i].function);
+ }
+}
+