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// 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/exit_code_watcher_win.h"
#include <stdint.h>
#include <utility>
#include "base/command_line.h"
#include "base/process/process.h"
#include "base/strings/string16.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/synchronization/waitable_event.h"
#include "base/test/multiprocess_test.h"
#include "base/test/test_reg_util_win.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "base/win/scoped_handle.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/multiprocess_func_list.h"
namespace browser_watcher {
namespace {
const base::char16 kRegistryPath[] = L"Software\\ExitCodeWatcherTest";
MULTIPROCESS_TEST_MAIN(Sleeper) {
// Sleep forever - the test harness will kill this process to give it an
// exit code.
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(INFINITE));
return 1;
}
class ScopedSleeperProcess {
public:
ScopedSleeperProcess() : is_killed_(false) {
}
~ScopedSleeperProcess() {
if (process_.IsValid()) {
process_.Terminate(-1, false);
EXPECT_TRUE(process_.WaitForExit(nullptr));
}
}
void Launch() {
ASSERT_FALSE(process_.IsValid());
base::CommandLine cmd_line(base::GetMultiProcessTestChildBaseCommandLine());
base::LaunchOptions options;
options.start_hidden = true;
process_ = base::SpawnMultiProcessTestChild("Sleeper", cmd_line, options);
ASSERT_TRUE(process_.IsValid());
}
void Kill(int exit_code, bool wait) {
ASSERT_TRUE(process_.IsValid());
ASSERT_FALSE(is_killed_);
process_.Terminate(exit_code, false);
int seen_exit_code = 0;
EXPECT_TRUE(process_.WaitForExit(&seen_exit_code));
EXPECT_EQ(exit_code, seen_exit_code);
is_killed_ = true;
}
const base::Process& process() const { return process_; }
private:
base::Process process_;
bool is_killed_;
};
class ExitCodeWatcherTest : public testing::Test {
public:
typedef testing::Test Super;
static const int kExitCode = 0xCAFEBABE;
ExitCodeWatcherTest() : cmd_line_(base::CommandLine::NO_PROGRAM) {}
void SetUp() override {
Super::SetUp();
override_manager_.OverrideRegistry(HKEY_CURRENT_USER);
}
base::Process OpenSelfWithAccess(uint32_t access) {
return base::Process::OpenWithAccess(base::GetCurrentProcId(), access);
}
void VerifyWroteExitCode(base::ProcessId proc_id, int exit_code) {
base::win::RegistryValueIterator it(
HKEY_CURRENT_USER, kRegistryPath);
ASSERT_EQ(1u, it.ValueCount());
base::win::RegKey key(HKEY_CURRENT_USER,
kRegistryPath,
KEY_QUERY_VALUE);
// The value name should encode the process id at the start.
EXPECT_TRUE(base::StartsWith(
it.Name(),
base::StringPrintf(L"%d-", proc_id),
base::CompareCase::SENSITIVE));
DWORD value = 0;
ASSERT_EQ(ERROR_SUCCESS, key.ReadValueDW(it.Name(), &value));
ASSERT_EQ(exit_code, static_cast<int>(value));
}
protected:
base::CommandLine cmd_line_;
registry_util::RegistryOverrideManager override_manager_;
};
} // namespace
TEST_F(ExitCodeWatcherTest, ExitCodeWatcherInvalidHandleFailsInit) {
ExitCodeWatcher watcher(kRegistryPath);
// A waitable event has a non process-handle.
base::Process event(::CreateEvent(NULL, false, false, NULL));
// A non-process handle should fail.
EXPECT_FALSE(watcher.Initialize(std::move(event)));
}
TEST_F(ExitCodeWatcherTest, ExitCodeWatcherNoAccessHandleFailsInit) {
ExitCodeWatcher watcher(kRegistryPath);
// Open a SYNCHRONIZE-only handle to this process.
base::Process self = OpenSelfWithAccess(SYNCHRONIZE);
ASSERT_TRUE(self.IsValid());
// A process handle with insufficient access should fail.
EXPECT_FALSE(watcher.Initialize(std::move(self)));
}
TEST_F(ExitCodeWatcherTest, ExitCodeWatcherSucceedsInit) {
ExitCodeWatcher watcher(kRegistryPath);
// Open a handle to this process with sufficient access for the watcher.
base::Process self =
OpenSelfWithAccess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION);
ASSERT_TRUE(self.IsValid());
// A process handle with sufficient access should succeed init.
EXPECT_TRUE(watcher.Initialize(std::move(self)));
}
TEST_F(ExitCodeWatcherTest, ExitCodeWatcherOnExitedProcess) {
ScopedSleeperProcess sleeper;
ASSERT_NO_FATAL_FAILURE(sleeper.Launch());
ExitCodeWatcher watcher(kRegistryPath);
EXPECT_TRUE(watcher.Initialize(sleeper.process().Duplicate()));
// Verify that the watcher wrote a sentinel for the process.
VerifyWroteExitCode(sleeper.process().Pid(), STILL_ACTIVE);
// Kill the sleeper, and make sure it's exited before we continue.
ASSERT_NO_FATAL_FAILURE(sleeper.Kill(kExitCode, true));
watcher.WaitForExit();
EXPECT_EQ(kExitCode, watcher.exit_code());
VerifyWroteExitCode(sleeper.process().Pid(), kExitCode);
}
} // namespace browser_watcher
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