blob: 30903b7b2ca43268f6c4c4db77e38fc86adff8f5 [file] [log] [blame]
// Copyright (c) 2014 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 "components/browser_watcher/watcher_client_win.h"
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string>
#include "base/base_switches.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/process/kill.h"
#include "base/process/process.h"
#include "base/strings/string_number_conversions.h"
#include "base/test/multiprocess_test.h"
#include "base/test/test_reg_util_win.h"
#include "base/win/scoped_handle.h"
#include "components/browser_watcher/exit_code_watcher_win.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/multiprocess_func_list.h"
namespace browser_watcher {
namespace {
// Command line switch used to communiate to the child test.
const char kParentHandle[] = "parent-handle";
bool IsValidParentProcessHandle(base::CommandLine& cmd_line,
const char* switch_name) {
std::string str_handle =
size_t integer_handle = 0;
if (!base::StringToSizeT(str_handle, &integer_handle))
return false;
base::ProcessHandle handle =
// Verify that we can get the associated process id.
base::ProcessId parent_id = base::GetProcId(handle);
if (parent_id == 0) {
// Unable to get the parent pid - perhaps insufficient permissions.
return false;
// Make sure the handle grants SYNCHRONIZE by waiting on it.
DWORD err = ::WaitForSingleObject(handle, 0);
if (err != WAIT_OBJECT_0 && err != WAIT_TIMEOUT) {
// Unable to wait on the handle - perhaps insufficient permissions.
return false;
return true;
std::string HandleToString(HANDLE handle) {
// A HANDLE is a void* pointer, which is the same size as a size_t,
// so we can use reinterpret_cast<> on it.
size_t integer_handle = reinterpret_cast<size_t>(handle);
return base::NumberToString(integer_handle);
base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
// Make sure we got a valid parent process handle from the watcher client.
if (!IsValidParentProcessHandle(*cmd_line, kParentHandle)) {
LOG(ERROR) << "Invalid or missing parent-handle.";
return 1;
return 0;
class WatcherClientTest : public base::MultiProcessTest {
void SetUp() override {
// Open an inheritable handle on our own process to test handle leakage.
TRUE, // Ineritable handle.
// Get a base command line to launch back into this test fixture.
base::CommandLine GetBaseCommandLine(HANDLE parent_handle) {
base::CommandLine ret = base::GetMultiProcessTestChildBaseCommandLine();
ret.AppendSwitchASCII(switches::kTestChildProcess, "VerifyParentHandle");
ret.AppendSwitchASCII(kParentHandle, HandleToString(parent_handle));
return ret;
WatcherClient::CommandLineGenerator GetBaseCommandLineGenerator() {
return base::Bind(&WatcherClientTest::GetBaseCommandLine,
void AssertSuccessfulExitCode(base::Process process) {
int exit_code = 0;
if (!process.WaitForExit(&exit_code))
FAIL() << "Process::WaitForExit failed.";
ASSERT_EQ(0, exit_code);
// Inheritable process handle used for testing.
base::win::ScopedHandle self_;
} // namespace
// TODO(siggi): More testing - test WatcherClient base implementation.
TEST_F(WatcherClientTest, LaunchWatcherSucceeds) {
WatcherClient client(GetBaseCommandLineGenerator());
} // namespace browser_watcher