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content / test / fuzzer / media_stream_dispatcher_host_mojolpm_fuzzer.cc [blame]
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/raw_ptr.h"
#include "base/no_destructor.h"
#include "base/run_loop.h"
#include "base/task/sequenced_task_runner.h"
#include "base/test/simple_test_tick_clock.h"
#include "content/browser/media/media_internals.h"
#include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "content/public/browser/audio_service.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/site_instance.h"
#include "content/public/common/content_switches.h"
#include "content/public/test/mock_navigation_handle.h"
#include "content/public/test/test_browser_context.h"
#include "content/test/fuzzer/media_stream_dispatcher_host_mojolpm_fuzzer.pb.h"
#include "content/test/fuzzer/mojolpm_fuzzer_support.h"
#include "content/test/test_render_frame_host.h"
#include "content/test/test_web_contents.h"
#include "media/audio/audio_manager.h"
#include "media/audio/audio_system_impl.h"
#include "media/audio/audio_thread_impl.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom-mojolpm.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"
#include "third_party/libprotobuf-mutator/src/src/libfuzzer/libfuzzer_macro.h"
const char* kCmdline[] = {
"media_stream_dispatcher_host_mojolpm_fuzzer",
"--use-fake-device-for-media-stream", // Make sure we use fake devices to
// avoid long delays.
nullptr};
content::mojolpm::FuzzerEnvironment& GetEnvironment() {
static base::NoDestructor<content::mojolpm::FuzzerEnvironment> environment(
2, kCmdline);
return *environment;
}
scoped_refptr<base::SequencedTaskRunner> GetFuzzerTaskRunner() {
return GetEnvironment().fuzzer_task_runner();
}
class MediaStreamDispatcherHostTestcase
: public mojolpm::Testcase<
content::fuzzing::media_stream_dispatcher_host::proto::Testcase,
content::fuzzing::media_stream_dispatcher_host::proto::Action> {
public:
using ProtoTestcase =
content::fuzzing::media_stream_dispatcher_host::proto::Testcase;
using ProtoAction =
content::fuzzing::media_stream_dispatcher_host::proto::Action;
explicit MediaStreamDispatcherHostTestcase(const ProtoTestcase& testcase);
~MediaStreamDispatcherHostTestcase();
void SetUp(base::OnceClosure done_closure) override;
void TearDown(base::OnceClosure done_closure) override;
void RunAction(const ProtoAction& action,
base::OnceClosure done_closure) override;
private:
void SetUpOnUIThread(base::OnceClosure done_closure);
void TearDownOnIOThread();
void TearDownOnUIThread(base::OnceClosure done_closure);
void AddMediaStreamDispatcherHost(uint32_t id,
base::OnceClosure done_closure);
void AddMediaStreamDispatcherHostImpl(
mojo::PendingReceiver<blink::mojom::MediaStreamDispatcherHost>&&
receiver);
// Prerequisite state.
content::mojolpm::RenderViewHostTestHarnessAdapter test_adapter_;
std::unique_ptr<media::AudioManager> audio_manager_ = nullptr;
std::unique_ptr<media::AudioSystem> audio_system_ = nullptr;
std::unique_ptr<content::MediaStreamManager> media_stream_manager_ = nullptr;
raw_ptr<content::TestRenderFrameHost> render_frame_host_ = nullptr;
};
MediaStreamDispatcherHostTestcase::MediaStreamDispatcherHostTestcase(
const ProtoTestcase& testcase)
: Testcase<ProtoTestcase, ProtoAction>(testcase) {
test_adapter_.SetUp();
}
MediaStreamDispatcherHostTestcase::~MediaStreamDispatcherHostTestcase() {
test_adapter_.TearDown();
audio_manager_.reset();
media_stream_manager_.reset();
}
void MediaStreamDispatcherHostTestcase::RunAction(
const ProtoAction& action,
base::OnceClosure run_closure) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
const auto ThreadId_UI = content::fuzzing::media_stream_dispatcher_host::
proto::RunThreadAction_ThreadId_UI;
const auto ThreadId_IO = content::fuzzing::media_stream_dispatcher_host::
proto::RunThreadAction_ThreadId_IO;
switch (action.action_case()) {
case ProtoAction::kRunThread:
// These actions ensure that any tasks currently queued on the named
// thread have chance to run before the fuzzer continues.
//
// We don't provide any particular guarantees here; this does not mean
// that the named thread is idle, nor does it prevent any other threads
// from running (or the consequences of any resulting callbacks, for
// example).
if (action.run_thread().id() == ThreadId_UI) {
content::GetUIThreadTaskRunner({})->PostTaskAndReply(
FROM_HERE, base::DoNothing(), std::move(run_closure));
} else if (action.run_thread().id() == ThreadId_IO) {
content::GetIOThreadTaskRunner({})->PostTaskAndReply(
FROM_HERE, base::DoNothing(), std::move(run_closure));
}
return;
case ProtoAction::kNewMediaStreamDispatcherHost:
AddMediaStreamDispatcherHost(
action.new_media_stream_dispatcher_host().id(),
std::move(run_closure));
return;
case ProtoAction::kMediaStreamDispatcherHostRemoteAction:
mojolpm::HandleRemoteAction(
action.media_stream_dispatcher_host_remote_action());
break;
case ProtoAction::ACTION_NOT_SET:
break;
}
GetFuzzerTaskRunner()->PostTask(FROM_HERE, std::move(run_closure));
}
void MediaStreamDispatcherHostTestcase::SetUp(base::OnceClosure done_closure) {
mojolpm::GetContext()->StartTestcase();
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&MediaStreamDispatcherHostTestcase::SetUpOnUIThread,
base::Unretained(this), std::move(done_closure)));
}
void MediaStreamDispatcherHostTestcase::SetUpOnUIThread(
base::OnceClosure done_closure) {
render_frame_host_ =
static_cast<content::TestWebContents*>(test_adapter_.web_contents())
->GetPrimaryMainFrame();
render_frame_host_->InitializeRenderFrameIfNeeded();
audio_manager_ = media::AudioManager::CreateForTesting(
std::make_unique<media::AudioThreadImpl>());
audio_system_ =
std::make_unique<media::AudioSystemImpl>(audio_manager_.get());
media_stream_manager_ =
std::make_unique<content::MediaStreamManager>(audio_system_.get());
GetFuzzerTaskRunner()->PostTask(FROM_HERE, std::move(done_closure));
}
void MediaStreamDispatcherHostTestcase::TearDown(
base::OnceClosure done_closure) {
mojolpm::GetContext()->EndTestcase();
content::GetIOThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&MediaStreamDispatcherHostTestcase::TearDownOnIOThread,
base::Unretained(this)));
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&MediaStreamDispatcherHostTestcase::TearDownOnUIThread,
base::Unretained(this), std::move(done_closure)));
}
void MediaStreamDispatcherHostTestcase::TearDownOnIOThread() {
media_stream_manager_->WillDestroyCurrentMessageLoop();
}
void MediaStreamDispatcherHostTestcase::TearDownOnUIThread(
base::OnceClosure done_closure) {
audio_manager_->Shutdown();
std::move(done_closure).Run();
}
void MediaStreamDispatcherHostTestcase::AddMediaStreamDispatcherHostImpl(
mojo::PendingReceiver<blink::mojom::MediaStreamDispatcherHost>&& receiver) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
// MediaStreamDispatcherHost is a self-owned receiver.
content::MediaStreamDispatcherHost::Create(render_frame_host_->GetGlobalId(),
media_stream_manager_.get(),
std::move(receiver));
}
// Component(s) which we fuzz
static void AddMediaStreamDispatcherHostInstance(
uint32_t id,
mojo::Remote<::blink::mojom::MediaStreamDispatcherHost>&& remote,
base::OnceClosure run_closure) {
mojolpm::GetContext()->AddInstance(id, std::move(remote));
std::move(run_closure).Run();
}
void MediaStreamDispatcherHostTestcase::AddMediaStreamDispatcherHost(
uint32_t id,
base::OnceClosure done_closure) {
mojo::Remote<blink::mojom::MediaStreamDispatcherHost> remote;
auto receiver = remote.BindNewPipeAndPassReceiver();
content::GetIOThreadTaskRunner({})->PostTaskAndReply(
FROM_HERE,
base::BindOnce(
&MediaStreamDispatcherHostTestcase::AddMediaStreamDispatcherHostImpl,
base::Unretained(this), std::move(receiver)),
base::BindOnce(AddMediaStreamDispatcherHostInstance, id,
std::move(remote), std::move(done_closure)));
}
DEFINE_BINARY_PROTO_FUZZER(
const content::fuzzing::media_stream_dispatcher_host::proto::Testcase&
proto_testcase) {
// bail out early if no work to do
if (!proto_testcase.actions_size() || !proto_testcase.sequences_size() ||
!proto_testcase.sequence_indexes_size()) {
return;
}
// Make sure that the environment is initialized before we do anything else.
GetEnvironment();
MediaStreamDispatcherHostTestcase testcase(proto_testcase);
base::RunLoop main_run_loop;
// Unretained is safe here, because `main_run_loop` has to finish before
// testcase goes out of scope.
GetFuzzerTaskRunner()->PostTask(
FROM_HERE,
base::BindOnce(&mojolpm::RunTestcase<MediaStreamDispatcherHostTestcase>,
base::Unretained(&testcase), GetFuzzerTaskRunner(),
main_run_loop.QuitClosure()));
main_run_loop.Run();
}