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// Copyright 2019 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 "chrome/common/conflicts/remote_module_watcher_win.h"
#include <windows.h>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/memory/scoped_refptr.h"
#include "base/test/task_environment.h"
#include "base/threading/thread_task_runner_handle.h"
#include "chrome/common/conflicts/module_event_sink_win.mojom.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class RemoteModuleWatcherTest : public testing::Test,
public mojom::ModuleEventSink {
public:
RemoteModuleWatcherTest() = default;
~RemoteModuleWatcherTest() override = default;
mojo::PendingRemote<mojom::ModuleEventSink> Bind() {
return receiver_.BindNewPipeAndPassRemote();
}
// mojom::ModuleEventSink:
void OnModuleEvents(
const std::vector<uint64_t>& module_load_addresses) override {
module_event_count_ += module_load_addresses.size();
}
void LoadModule() {
if (module_handle_)
return;
// This module should not be a static dependency of the unit-test
// executable, but should be a build-system dependency or a module that is
// present on any Windows machine.
static constexpr wchar_t kModuleName[] = L"conflicts_dll.dll";
// The module should not already be loaded.
ASSERT_FALSE(::GetModuleHandle(kModuleName));
// It should load successfully.
module_handle_ = ::LoadLibrary(kModuleName);
ASSERT_TRUE(module_handle_);
}
void UnloadModule() {
if (!module_handle_)
return;
::FreeLibrary(module_handle_);
module_handle_ = nullptr;
}
// Runs the task scheduler until no tasks are running.
void RunUntilIdle() { task_environment_.RunUntilIdle(); }
void FastForwardByIdleDelay() {
task_environment_.FastForwardBy(RemoteModuleWatcher::kIdleDelay);
}
HMODULE module_handle() { return module_handle_; }
int module_event_count() { return module_event_count_; }
private:
// Must be first.
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
// Binds a ModuleEventSinkRequest to this implementation of ModuleEventSink.
mojo::Receiver<mojom::ModuleEventSink> receiver_{this};
// Holds a handle to a loaded module.
HMODULE module_handle_ = nullptr;
// Total number of module events seen.
int module_event_count_ = 0;
DISALLOW_COPY_AND_ASSIGN(RemoteModuleWatcherTest);
};
} // namespace
TEST_F(RemoteModuleWatcherTest, ModuleEvents) {
auto remote_module_watcher =
RemoteModuleWatcher::Create(base::ThreadTaskRunnerHandle::Get(), Bind());
// Wait until the watcher is initialized and events for already loaded modules
// are received.
RunUntilIdle();
// Now wait for the timer used to batch events to expire.
FastForwardByIdleDelay();
EXPECT_GT(module_event_count(), 0);
// Dynamically load a module and ensure a notification is received for it.
int previous_module_event_count = module_event_count();
LoadModule();
FastForwardByIdleDelay();
EXPECT_GT(module_event_count(), previous_module_event_count);
UnloadModule();
// Destroy the module watcher.
remote_module_watcher = nullptr;
RunUntilIdle();
// Load the module and ensure no notification is received this time.
previous_module_event_count = module_event_count();
LoadModule();
FastForwardByIdleDelay();
EXPECT_EQ(module_event_count(), previous_module_event_count);
UnloadModule();
}
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