ipc/chromium/src/base/debug_on_start.cc@6474c204b198
ipc/chromium/src/base/debug_on_start.cc
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.
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.
5 #include <windows.h>
7 #include "base/debug_on_start.h"
9 #include "base/base_switches.h"
10 #include "base/basictypes.h"
11 #include "base/debug_util.h"
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 }
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.
55 // It will fails if we run in a sandbox. That is expected.
56 DebugUtil::SpawnDebuggerOnProcess(GetCurrentProcessId());
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 }
