75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#include "base/debug/debug_on_start_win.h"
|
||
|
|
|
||
|
|
#include <windows.h>
|
||
|
|
|
||
|
|
#include "base/base_switches.h"
|
||
|
|
#include "base/basictypes.h"
|
||
|
|
#include "base/debug/debugger.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
namespace debug {
|
||
|
|
|
||
|
|
// Minimalist implementation to try to find a command line argument. We can use
|
||
|
|
// kernel32 exported functions but not the CRT functions because we're too early
|
||
|
|
// in the process startup.
|
||
|
|
// The code is not that bright and will find things like ---argument or
|
||
|
|
// /-/argument.
|
||
|
|
// Note: command_line is non-destructively modified.
|
||
|
|
bool DebugOnStart::FindArgument(wchar_t* command_line, const char* argument_c) {
|
||
|
|
wchar_t argument[50] = {};
|
||
|
|
for (int i = 0; argument_c[i]; ++i)
|
||
|
|
argument[i] = argument_c[i];
|
||
|
|
|
||
|
|
int argument_len = lstrlen(argument);
|
||
|
|
int command_line_len = lstrlen(command_line);
|
||
|
|
while (command_line_len > argument_len) {
|
||
|
|
wchar_t first_char = command_line[0];
|
||
|
|
wchar_t last_char = command_line[argument_len+1];
|
||
|
|
// Try to find an argument.
|
||
|
|
if ((first_char == L'-' || first_char == L'/') &&
|
||
|
|
(last_char == L' ' || last_char == 0 || last_char == L'=')) {
|
||
|
|
command_line[argument_len+1] = 0;
|
||
|
|
// Skip the - or /
|
||
|
|
if (lstrcmpi(command_line+1, argument) == 0) {
|
||
|
|
// Found it.
|
||
|
|
command_line[argument_len+1] = last_char;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
// Fix back.
|
||
|
|
command_line[argument_len+1] = last_char;
|
||
|
|
}
|
||
|
|
// Continue searching.
|
||
|
|
++command_line;
|
||
|
|
--command_line_len;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// static
|
||
|
|
int __cdecl DebugOnStart::Init() {
|
||
|
|
// Try to find the argument.
|
||
|
|
if (FindArgument(GetCommandLine(), switches::kDebugOnStart)) {
|
||
|
|
// We can do 2 things here:
|
||
|
|
// - Ask for a debugger to attach to us. This involve reading the registry
|
||
|
|
// key and creating the process.
|
||
|
|
// - Do a int3.
|
||
|
|
|
||
|
|
// It will fails if we run in a sandbox. That is expected.
|
||
|
|
base::debug::SpawnDebuggerOnProcess(GetCurrentProcessId());
|
||
|
|
|
||
|
|
// Wait for a debugger to come take us.
|
||
|
|
base::debug::WaitForDebugger(60, false);
|
||
|
|
} else if (FindArgument(GetCommandLine(), switches::kWaitForDebugger)) {
|
||
|
|
// Wait for a debugger to come take us.
|
||
|
|
base::debug::WaitForDebugger(60, true);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace debug
|
||
|
|
} // namespace base
|