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comparison: ipc/chromium/src/base/debug_on_start.cc
ipc/chromium/src/base/debug_on_start.cc
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <windows.h> | |
| 6 | |
| 7 #include "base/debug_on_start.h" | |
| 8 | |
| 9 #include "base/base_switches.h" | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/debug_util.h" | |
| 12 | |
| 13 // Minimalist implementation to try to find a command line argument. We can use | |
| 14 // kernel32 exported functions but not the CRT functions because we're too early | |
| 15 // in the process startup. | |
| 16 // The code is not that bright and will find things like ---argument or | |
| 17 // /-/argument. | |
| 18 // Note: command_line is non-destructively modified. | |
| 19 bool DebugOnStart::FindArgument(wchar_t* command_line, const wchar_t* argument) | |
| 20 { | |
| 21 int argument_len = lstrlen(argument); | |
| 22 int command_line_len = lstrlen(command_line); | |
| 23 while (command_line_len > argument_len) { | |
| 24 wchar_t first_char = command_line[0]; | |
| 25 wchar_t last_char = command_line[argument_len+1]; | |
| 26 // Try to find an argument. | |
| 27 if ((first_char == L'-' || first_char == L'/') && | |
| 28 (last_char == L' ' || last_char == 0 || last_char == L'=')) { | |
| 29 command_line[argument_len+1] = 0; | |
| 30 // Skip the - or / | |
| 31 if (lstrcmpi(command_line+1, argument) == 0) { | |
| 32 // Found it. | |
| 33 command_line[argument_len+1] = last_char; | |
| 34 return true; | |
| 35 } | |
| 36 // Fix back. | |
| 37 command_line[argument_len+1] = last_char; | |
| 38 } | |
| 39 // Continue searching. | |
| 40 ++command_line; | |
| 41 --command_line_len; | |
| 42 } | |
| 43 return false; | |
| 44 } | |
| 45 | |
| 46 // static | |
| 47 int __cdecl DebugOnStart::Init() { | |
| 48 // Try to find the argument. | |
| 49 if (FindArgument(GetCommandLine(), switches::kDebugOnStart)) { | |
| 50 // We can do 2 things here: | |
| 51 // - Ask for a debugger to attach to us. This involve reading the registry | |
| 52 // key and creating the process. | |
| 53 // - Do a int3. | |
| 54 | |
| 55 // It will fails if we run in a sandbox. That is expected. | |
| 56 DebugUtil::SpawnDebuggerOnProcess(GetCurrentProcessId()); | |
| 57 | |
| 58 // Wait for a debugger to come take us. | |
| 59 DebugUtil::WaitForDebugger(60, false); | |
| 60 } else if (FindArgument(GetCommandLine(), switches::kWaitForDebugger)) { | |
| 61 // Wait for a debugger to come take us. | |
| 62 DebugUtil::WaitForDebugger(60, true); | |
| 63 } | |
| 64 return 0; | |
| 65 } |
