1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
32 * @author Jose Fonseca <jfonseca@vmware.com>
36 #include "u_debug_symbol.h"
37 #include "u_debug_stack.h"
41 debug_backtrace_capture(struct debug_stack_frame *backtrace,
45 const void **frame_pointer = NULL;
51 #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)
52 __asm__ __volatile__("mov (%%ebp),%0": "=r" (frame_pointer));
53 frame_pointer = (const void **)frame_pointer[0];
54 #elif defined(PIPE_CC_GCC)
55 frame_pointer = ((const void **)__builtin_frame_address(1));
56 #elif defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86)
58 mov frame_pointer, ebp
60 frame_pointer = (const void **)frame_pointer[0];
68 const void **next_frame_pointer;
76 backtrace[i++].function = frame_pointer[1];
80 next_frame_pointer = (const void **)frame_pointer[0];
82 /* Limit the stack walk to avoid referencing undefined memory */
83 if((uintptr_t)next_frame_pointer <= (uintptr_t)frame_pointer ||
84 (uintptr_t)next_frame_pointer > (uintptr_t)frame_pointer + 64*1024)
87 frame_pointer = next_frame_pointer;
92 backtrace[i++].function = NULL;
99 debug_backtrace_dump(const struct debug_stack_frame *backtrace,
104 for(i = 0; i < nr_frames; ++i) {
105 if(!backtrace[i].function)
107 debug_symbol_print(backtrace[i].function);