ipc/chromium/src/base/debug_on_start.h@6474c204b198 (annotated)
ipc/chromium/src/base/debug_on_start.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | // Define the necessary code and global data to look for kDebugOnStart command |
| michael@0 | 6 | // line argument. When the command line argument is detected, it invokes the |
| michael@0 | 7 | // debugger, if no system-wide debugger is registered, a debug break is done. |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef BASE_DEBUG_ON_START_H_ |
| michael@0 | 10 | #define BASE_DEBUG_ON_START_H_ |
| michael@0 | 11 | |
| michael@0 | 12 | #include "base/basictypes.h" |
| michael@0 | 13 | |
| michael@0 | 14 | // This only works on MSVC. |
| michael@0 | 15 | #if defined(COMPILER_MSVC) |
| michael@0 | 16 | |
| michael@0 | 17 | #ifndef DECLSPEC_SELECTANY |
| michael@0 | 18 | #define DECLSPEC_SELECTANY __declspec(selectany) |
| michael@0 | 19 | #endif |
| michael@0 | 20 | |
| michael@0 | 21 | // Debug on start functions and data. |
| michael@0 | 22 | class DebugOnStart { |
| michael@0 | 23 | public: |
| michael@0 | 24 | // Expected function type in the .CRT$XI* section. |
| michael@0 | 25 | // Note: See VC\crt\src\internal.h for reference. |
| michael@0 | 26 | typedef int (__cdecl *PIFV)(void); |
| michael@0 | 27 | |
| michael@0 | 28 | // Looks at the command line for kDebugOnStart argument. If found, it invokes |
| michael@0 | 29 | // the debugger, if this fails, it crashes. |
| michael@0 | 30 | static int __cdecl Init(); |
| michael@0 | 31 | |
| michael@0 | 32 | // Returns true if the 'argument' is present in the 'command_line'. It does |
| michael@0 | 33 | // not use the CRT, only Kernel32 functions. |
| michael@0 | 34 | static bool FindArgument(wchar_t* command_line, const wchar_t* argument); |
| michael@0 | 35 | }; |
| michael@0 | 36 | |
| michael@0 | 37 | // Set the function pointer to our function to look for a crash on start. The |
| michael@0 | 38 | // XIB section is started pretty early in the program initialization so in |
| michael@0 | 39 | // theory it should be called before any user created global variable |
| michael@0 | 40 | // initialization code and CRT initialization code. |
| michael@0 | 41 | // Note: See VC\crt\src\defsects.inc and VC\crt\src\crt0.c for reference. |
| michael@0 | 42 | #ifdef _WIN64 |
| michael@0 | 43 | |
| michael@0 | 44 | // "Fix" the segment. On x64, the .CRT segment is merged into the .rdata segment |
| michael@0 | 45 | // so it contains const data only. |
| michael@0 | 46 | #pragma const_seg(push, ".CRT$XIB") |
| michael@0 | 47 | // Declare the pointer so the CRT will find it. |
| michael@0 | 48 | extern const DebugOnStart::PIFV debug_on_start; |
| michael@0 | 49 | DECLSPEC_SELECTANY const DebugOnStart::PIFV debug_on_start = |
| michael@0 | 50 | &DebugOnStart::Init; |
| michael@0 | 51 | // Fix back the segment. |
| michael@0 | 52 | #pragma const_seg(pop) |
| michael@0 | 53 | |
| michael@0 | 54 | #else // _WIN64 |
| michael@0 | 55 | |
| michael@0 | 56 | // "Fix" the segment. On x86, the .CRT segment is merged into the .data segment |
| michael@0 | 57 | // so it contains non-const data only. |
| michael@0 | 58 | #pragma data_seg(push, ".CRT$XIB") |
| michael@0 | 59 | // Declare the pointer so the CRT will find it. |
| michael@0 | 60 | DECLSPEC_SELECTANY DebugOnStart::PIFV debug_on_start = &DebugOnStart::Init; |
| michael@0 | 61 | // Fix back the segment. |
| michael@0 | 62 | #pragma data_seg(pop) |
| michael@0 | 63 | |
| michael@0 | 64 | #endif // _WIN64 |
| michael@0 | 65 | #endif // defined(OS_WIN) |
| michael@0 | 66 | |
| michael@0 | 67 | #endif // BASE_DEBUG_ON_START_H_ |
