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// Copyright 2022 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/task/sequenced_task_runner.h"
#include "content/browser/renderer_host/clipboard_host_impl.h"
#include "content/public/test/test_browser_context.h"
#include "content/test/fuzzer/clipboard_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 "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/clipboard/clipboard.mojom-mojolpm.h"
#include "third_party/blink/public/mojom/clipboard/clipboard.mojom.h"
#include "third_party/libprotobuf-mutator/src/src/libfuzzer/libfuzzer_macro.h"
const char* const kCmdline[] = {"clipboard_host_mojolpm_fuzzer", nullptr};
content::mojolpm::FuzzerEnvironment& GetEnvironment() {
static base::NoDestructor<content::mojolpm::FuzzerEnvironment> environment(
1, kCmdline);
return *environment;
}
scoped_refptr<base::SequencedTaskRunner> GetFuzzerTaskRunner() {
return GetEnvironment().fuzzer_task_runner();
}
// Per-testcase state needed to run the interface being tested.
//
// The lifetime of this is scoped to a single testcase, and it is created and
// destroyed from the fuzzer sequence.
//
class ClipboardHostTestcase
: public ::mojolpm::Testcase<
content::fuzzing::clipboard_host::proto::Testcase,
content::fuzzing::clipboard_host::proto::Action> {
public:
using ProtoTestcase = content::fuzzing::clipboard_host::proto::Testcase;
using ProtoAction = content::fuzzing::clipboard_host::proto::Action;
explicit ClipboardHostTestcase(
const content::fuzzing::clipboard_host::proto::Testcase& testcase);
~ClipboardHostTestcase();
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 TearDownOnUIThread(base::OnceClosure done_closure);
void AddClipboardHostImpl(
uint32_t id,
mojo::PendingReceiver<blink::mojom::ClipboardHost>&& receiver);
void AddClipboardHost(uint32_t id, base::OnceClosure done_closure);
content::mojolpm::RenderViewHostTestHarnessAdapter test_adapter_;
raw_ptr<content::TestRenderFrameHost> render_frame_host_ = nullptr;
};
ClipboardHostTestcase::ClipboardHostTestcase(const ProtoTestcase& testcase)
: Testcase<ProtoTestcase, ProtoAction>(testcase) {
test_adapter_.SetUp();
}
ClipboardHostTestcase::~ClipboardHostTestcase() {
test_adapter_.TearDown();
}
void ClipboardHostTestcase::RunAction(const ProtoAction& action,
base::OnceClosure run_closure) {
DCHECK_CALLED_ON_VALID_SEQUENCE(this->sequence_checker_);
const auto ThreadId_UI =
content::fuzzing::clipboard_host::proto::RunThreadAction_ThreadId_UI;
const auto ThreadId_IO =
content::fuzzing::clipboard_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::kNewClipboardHost:
AddClipboardHost(action.new_clipboard_host().id(),
std::move(run_closure));
return;
case ProtoAction::kClipboardHostRemoteAction:
mojolpm::HandleRemoteAction(action.clipboard_host_remote_action());
break;
case ProtoAction::ACTION_NOT_SET:
break;
}
GetFuzzerTaskRunner()->PostTask(FROM_HERE, std::move(run_closure));
}
void ClipboardHostTestcase::SetUp(base::OnceClosure done_closure) {
DCHECK_CALLED_ON_VALID_SEQUENCE(this->sequence_checker_);
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&ClipboardHostTestcase::SetUpOnUIThread,
base::Unretained(this), std::move(done_closure)));
}
void ClipboardHostTestcase::SetUpOnUIThread(base::OnceClosure done_closure) {
render_frame_host_ =
static_cast<content::TestWebContents*>(test_adapter_.web_contents())
->GetPrimaryMainFrame();
render_frame_host_->InitializeRenderFrameIfNeeded();
GetFuzzerTaskRunner()->PostTask(FROM_HERE, std::move(done_closure));
}
void ClipboardHostTestcase::TearDown(base::OnceClosure done_closure) {
DCHECK_CALLED_ON_VALID_SEQUENCE(this->sequence_checker_);
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&ClipboardHostTestcase::TearDownOnUIThread,
base::Unretained(this), std::move(done_closure)));
}
void ClipboardHostTestcase::TearDownOnUIThread(base::OnceClosure done_closure) {
GetFuzzerTaskRunner()->PostTask(FROM_HERE, std::move(done_closure));
}
void ClipboardHostTestcase::AddClipboardHostImpl(
uint32_t id,
mojo::PendingReceiver<blink::mojom::ClipboardHost>&& receiver) {
content::ClipboardHostImpl::Create(render_frame_host_, std::move(receiver));
}
static void AddClipboardHostInstance(
uint32_t id,
mojo::Remote<blink::mojom::ClipboardHost> remote,
base::OnceClosure run_closure) {
mojolpm::GetContext()->AddInstance(id, std::move(remote));
std::move(run_closure).Run();
}
void ClipboardHostTestcase::AddClipboardHost(uint32_t id,
base::OnceClosure run_closure) {
DCHECK_CALLED_ON_VALID_SEQUENCE(this->sequence_checker_);
mojo::Remote<blink::mojom::ClipboardHost> remote;
auto receiver = remote.BindNewPipeAndPassReceiver();
content::GetUIThreadTaskRunner({})->PostTaskAndReply(
FROM_HERE,
base::BindOnce(&ClipboardHostTestcase::AddClipboardHostImpl,
base::Unretained(this), id, std::move(receiver)),
base::BindOnce(AddClipboardHostInstance, id, std::move(remote),
std::move(run_closure)));
}
DEFINE_BINARY_PROTO_FUZZER(
const content::fuzzing::clipboard_host::proto::Testcase& proto_testcase) {
if (!proto_testcase.actions_size() || !proto_testcase.sequences_size() ||
!proto_testcase.sequence_indexes_size()) {
return;
}
GetEnvironment();
ClipboardHostTestcase testcase(proto_testcase);
base::RunLoop main_run_loop;
GetFuzzerTaskRunner()->PostTask(
FROM_HERE,
base::BindOnce(&mojolpm::RunTestcase<ClipboardHostTestcase>,
base::Unretained(&testcase), GetFuzzerTaskRunner(),
main_run_loop.QuitClosure()));
main_run_loop.Run();
}
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