| 0,0 → 1,161 |
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| /************************************************************************** |
| * |
| * 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" |
| |
| #if defined(PIPE_OS_WINDOWS) |
| #include <windows.h> |
| #endif |
| |
| |
| /** |
| * Capture stack backtrace. |
| * |
| * NOTE: The implementation of this function is quite big, but it is important not to |
| * break it down in smaller functions to avoid adding new frames to the calling stack. |
| */ |
| 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; |
| } |
| |
| /* |
| * On Windows try obtaining the stack backtrace via CaptureStackBackTrace. |
| * |
| * It works reliably both for x86 for x86_64. |
| */ |
| #if defined(PIPE_OS_WINDOWS) |
| { |
| typedef USHORT (WINAPI *PFNCAPTURESTACKBACKTRACE)(ULONG, ULONG, PVOID *, PULONG); |
| static PFNCAPTURESTACKBACKTRACE pfnCaptureStackBackTrace = NULL; |
| |
| if (!pfnCaptureStackBackTrace) { |
| static HMODULE hModule = NULL; |
| if (!hModule) { |
| hModule = LoadLibraryA("kernel32"); |
| assert(hModule); |
| } |
| if (hModule) { |
| pfnCaptureStackBackTrace = (PFNCAPTURESTACKBACKTRACE)GetProcAddress(hModule, |
| "RtlCaptureStackBackTrace"); |
| } |
| } |
| if (pfnCaptureStackBackTrace) { |
| /* |
| * Skip this (debug_backtrace_capture) function's frame. |
| */ |
| |
| start_frame += 1; |
| |
| assert(start_frame + nr_frames < 63); |
| i = pfnCaptureStackBackTrace(start_frame, nr_frames, (PVOID *) &backtrace->function, NULL); |
| |
| /* Pad remaing requested frames with NULL */ |
| while (i < nr_frames) { |
| backtrace[i++].function = NULL; |
| } |
| |
| return; |
| } |
| } |
| #endif |
| |
| #if 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; |
| } |
| #else |
| (void) 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); |
| } |
| } |
| |