| // Copyright 2013 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "tools/ipc_fuzzer/message_replay/replay_process.h" |
| |
| #include <limits.h> |
| |
| #include <string> |
| #include <tuple> |
| #include <utility> |
| |
| #include "base/command_line.h" |
| #include "base/files/file_path.h" |
| #include "base/functional/bind.h" |
| #include "base/logging.h" |
| #include "base/message_loop/message_pump_type.h" |
| #include "base/run_loop.h" |
| #include "base/task/single_thread_task_runner.h" |
| #include "build/build_config.h" |
| #include "chrome/common/chrome_switches.h" |
| #include "content/common/child_process.mojom-test-utils.h" |
| #include "content/common/content_constants_internal.h" |
| #include "content/public/common/content_switches.h" |
| #include "ipc/ipc.mojom.h" |
| #include "ipc/ipc_channel_mojo.h" |
| #include "mojo/core/embedder/configuration.h" |
| #include "mojo/core/embedder/embedder.h" |
| #include "mojo/core/embedder/scoped_ipc_support.h" |
| #include "mojo/public/cpp/bindings/pending_receiver.h" |
| #include "mojo/public/cpp/bindings/pending_remote.h" |
| #include "mojo/public/cpp/bindings/remote.h" |
| #include "mojo/public/cpp/bindings/self_owned_receiver.h" |
| #include "mojo/public/cpp/platform/platform_channel.h" |
| #include "mojo/public/cpp/platform/platform_channel_endpoint.h" |
| #include "mojo/public/cpp/system/invitation.h" |
| |
| #if BUILDFLAG(IS_POSIX) |
| #include "base/posix/global_descriptors.h" |
| #include "content/public/common/content_descriptors.h" |
| #endif |
| |
| namespace ipc_fuzzer { |
| |
| namespace { |
| |
| // Used to simulate a basic child process IPC endpoint and bootstrap the legacy |
| // IPC channel driven by this process. |
| class FakeChildProcessImpl |
| : public content::mojom::ChildProcessInterceptorForTesting { |
| public: |
| FakeChildProcessImpl() { |
| std::ignore = disconnected_process_.BindNewPipeAndPassReceiver(); |
| } |
| |
| // content::mojom::ChildProcessInterceptorForTesting overrides: |
| content::mojom::ChildProcess* GetForwardingInterface() override { |
| return disconnected_process_.get(); |
| } |
| |
| private: |
| mojo::Remote<content::mojom::ChildProcess> disconnected_process_; |
| }; |
| |
| } // namespace |
| |
| void InitializeMojo() { |
| mojo::core::Configuration config; |
| config.max_message_num_bytes = 64 * 1024 * 1024; |
| mojo::core::Init(config); |
| } |
| |
| mojo::IncomingInvitation InitializeMojoIPCChannel() { |
| mojo::PlatformChannelEndpoint endpoint; |
| #if BUILDFLAG(IS_WIN) |
| endpoint = mojo::PlatformChannel::RecoverPassedEndpointFromCommandLine( |
| *base::CommandLine::ForCurrentProcess()); |
| #elif BUILDFLAG(IS_POSIX) |
| endpoint = mojo::PlatformChannelEndpoint(mojo::PlatformHandle(base::ScopedFD( |
| base::GlobalDescriptors::GetInstance()->Get(kMojoIPCChannel)))); |
| #endif |
| CHECK(endpoint.is_valid()); |
| return mojo::IncomingInvitation::Accept(std::move(endpoint)); |
| } |
| |
| ReplayProcess::ReplayProcess() |
| : io_thread_("Chrome_ChildIOThread"), |
| shutdown_event_(base::WaitableEvent::ResetPolicy::MANUAL, |
| base::WaitableEvent::InitialState::NOT_SIGNALED), |
| message_index_(0) {} |
| |
| ReplayProcess::~ReplayProcess() { |
| channel_.reset(); |
| |
| // Signal this event before shutting down the service process. That way all |
| // background threads can cleanup. |
| shutdown_event_.Signal(); |
| io_thread_.Stop(); |
| } |
| |
| bool ReplayProcess::Initialize(int argc, const char** argv) { |
| base::CommandLine::Init(argc, argv); |
| |
| if (!base::CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kIpcFuzzerTestcase)) { |
| LOG(ERROR) << "This binary shouldn't be executed directly, " |
| << "please use tools/ipc_fuzzer/scripts/play_testcase.py"; |
| return false; |
| } |
| |
| // Log to both stderr and file destinations. |
| logging::SetMinLogLevel(logging::LOGGING_ERROR); |
| logging::LoggingSettings settings; |
| settings.logging_dest = logging::LOG_TO_ALL; |
| settings.log_file_path = FILE_PATH_LITERAL("ipc_replay.log"); |
| logging::InitLogging(settings); |
| |
| // Make sure to initialize Mojo before starting the IO thread. |
| InitializeMojo(); |
| |
| io_thread_.StartWithOptions( |
| base::Thread::Options(base::MessagePumpType::IO, 0)); |
| |
| #if BUILDFLAG(IS_POSIX) |
| base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance(); |
| g_fds->Set(kMojoIPCChannel, |
| kMojoIPCChannel + base::GlobalDescriptors::kBaseDescriptor); |
| #endif |
| |
| mojo_ipc_support_.reset(new mojo::core::ScopedIPCSupport( |
| io_thread_.task_runner(), |
| mojo::core::ScopedIPCSupport::ShutdownPolicy::FAST)); |
| mojo_invitation_ = |
| std::make_unique<mojo::IncomingInvitation>(InitializeMojoIPCChannel()); |
| |
| return true; |
| } |
| |
| void ReplayProcess::OpenChannel() { |
| DCHECK(mojo_invitation_); |
| mojo::ScopedMessagePipeHandle child_process_pipe_for_receiver = |
| mojo_invitation_->ExtractMessagePipe( |
| content::kChildProcessReceiverAttachmentName); |
| mojo::ScopedMessagePipeHandle legacy_ipc_bootstrap_pipe = |
| mojo_invitation_->ExtractMessagePipe( |
| content::kLegacyIpcBootstrapAttachmentName); |
| mojo::MakeSelfOwnedReceiver( |
| std::make_unique<FakeChildProcessImpl>(), |
| mojo::PendingReceiver<content::mojom::ChildProcess>( |
| std::move(child_process_pipe_for_receiver))); |
| channel_ = IPC::ChannelProxy::Create( |
| IPC::ChannelMojo::CreateClientFactory( |
| std::move(legacy_ipc_bootstrap_pipe), io_thread_.task_runner(), |
| base::SingleThreadTaskRunner::GetCurrentDefault()), |
| this, io_thread_.task_runner(), |
| base::SingleThreadTaskRunner::GetCurrentDefault()); |
| } |
| |
| bool ReplayProcess::OpenTestcase() { |
| base::FilePath path = |
| base::CommandLine::ForCurrentProcess()->GetSwitchValuePath( |
| switches::kIpcFuzzerTestcase); |
| return MessageFile::Read(path, &messages_); |
| } |
| |
| void ReplayProcess::SendNextMessage() { |
| if (message_index_ >= messages_.size()) { |
| loop_.QuitWhenIdle(); |
| return; |
| } |
| |
| std::unique_ptr<IPC::Message> message = |
| std::move(messages_[message_index_++]); |
| |
| if (!channel_->Send(message.release())) { |
| LOG(ERROR) << "ChannelProxy::Send() failed after " |
| << message_index_ << " messages"; |
| loop_.QuitWhenIdle(); |
| } |
| } |
| |
| void ReplayProcess::Run() { |
| base::RepeatingTimer timer; |
| timer.Start(FROM_HERE, base::Milliseconds(1), |
| base::BindRepeating(&ReplayProcess::SendNextMessage, |
| base::Unretained(this))); |
| loop_.Run(); |
| } |
| |
| bool ReplayProcess::OnMessageReceived(const IPC::Message& msg) { |
| return true; |
| } |
| |
| void ReplayProcess::OnChannelError() { |
| LOG(ERROR) << "Channel error, quitting after " |
| << message_index_ << " messages"; |
| loop_.QuitWhenIdle(); |
| } |
| |
| } // namespace ipc_fuzzer |