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| author | marha <marha@users.sourceforge.net> | 2011-04-30 15:25:48 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-04-30 15:25:48 +0000 |
| commit | 0402d388cb9803652c0f9a52ba7dcb6029fdd0b9 (patch) | |
| tree | afd1b68edb9a74d5c87e63ea72d04b8301705d82 /mesalib/src/gallium/auxiliary/util/u_debug_stack.c | |
| parent | c4ae0bb951bfb6061e7f0c492ba03de330137515 (diff) | |
| download | vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.tar.gz vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.tar.bz2 vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.zip | |
Added extra needed files
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_debug_stack.c')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_debug_stack.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_debug_stack.c b/mesalib/src/gallium/auxiliary/util/u_debug_stack.c new file mode 100644 index 000000000..046bb43b1 --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_debug_stack.c @@ -0,0 +1,110 @@ +/**************************************************************************
+ *
+ * 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_symbol.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) && defined(PIPE_ARCH_X86)
+ __asm__ __volatile__("mov (%%ebp),%0": "=r" (frame_pointer));
+ frame_pointer = (const void **)frame_pointer[0];
+#elif defined(PIPE_CC_GCC)
+ frame_pointer = ((const void **)__builtin_frame_address(1));
+#elif defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86)
+ __asm {
+ mov frame_pointer, ebp
+ }
+ frame_pointer = (const void **)frame_pointer[0];
+#else
+ frame_pointer = NULL;
+#endif
+
+
+#ifdef PIPE_ARCH_X86
+ while(nr_frames) {
+ const void **next_frame_pointer;
+
+ if(!frame_pointer)
+ break;
+
+ if(start_frame)
+ --start_frame;
+ else {
+ backtrace[i++].function = frame_pointer[1];
+ --nr_frames;
+ }
+
+ next_frame_pointer = (const void **)frame_pointer[0];
+
+ /* Limit the stack walk to avoid referencing undefined memory */
+ if((uintptr_t)next_frame_pointer <= (uintptr_t)frame_pointer ||
+ (uintptr_t)next_frame_pointer > (uintptr_t)frame_pointer + 64*1024)
+ break;
+
+ frame_pointer = next_frame_pointer;
+ }
+#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_symbol_print(backtrace[i].function);
+ }
+}
+
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