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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/web_test/renderer/gc_controller.h"
#include <tuple>
#include "base/functional/bind.h"
#include "base/task/single_thread_task_runner.h"
#include "gin/arguments.h"
#include "gin/handle.h"
#include "gin/object_template_builder.h"
#include "third_party/blink/public/platform/scheduler/web_agent_group_scheduler.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "v8/include/v8.h"
namespace content {
gin::WrapperInfo GCController::kWrapperInfo = {gin::kEmbedderNativeGin};
// static
void GCController::Install(blink::WebLocalFrame* frame) {
v8::Isolate* isolate = frame->GetAgentGroupScheduler()->Isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = frame->MainWorldScriptContext();
if (context.IsEmpty())
return;
v8::Context::Scope context_scope(context);
gin::Handle<GCController> controller =
gin::CreateHandle(isolate, new GCController(frame));
if (controller.IsEmpty())
return;
v8::Local<v8::Object> global = context->Global();
global
->Set(context, gin::StringToV8(isolate, "GCController"),
controller.ToV8())
.Check();
}
GCController::GCController(blink::WebLocalFrame* frame) : frame_(frame) {}
GCController::~GCController() = default;
gin::ObjectTemplateBuilder GCController::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return gin::Wrappable<GCController>::GetObjectTemplateBuilder(isolate)
.SetMethod("collect", &GCController::Collect)
.SetMethod("collectAll", &GCController::CollectAll)
.SetMethod("minorCollect", &GCController::MinorCollect)
.SetMethod("asyncCollectAll", &GCController::AsyncCollectAll);
}
void GCController::Collect(const gin::Arguments& args) {
args.isolate()->RequestGarbageCollectionForTesting(
v8::Isolate::kFullGarbageCollection);
}
void GCController::CollectAll(const gin::Arguments& args) {
for (int i = 0; i < kNumberOfGCsForFullCollection; i++) {
args.isolate()->RequestGarbageCollectionForTesting(
v8::Isolate::kFullGarbageCollection);
}
}
void GCController::AsyncCollectAll(const gin::Arguments& args) {
v8::HandleScope scope(args.isolate());
if (args.PeekNext().IsEmpty() || !args.PeekNext()->IsFunction()) {
args.ThrowTypeError(
"asyncCollectAll should be called with a callback argument being a "
"v8::Function.");
return;
}
v8::UniquePersistent<v8::Function> js_callback(
args.isolate(), v8::Local<v8::Function>::Cast(args.PeekNext()));
// Bind the js callback into a OnceClosure that will be run asynchronously in
// a fresh call stack.
base::OnceClosure run_async =
base::BindOnce(&GCController::AsyncCollectAllWithEmptyStack,
weak_ptr_factory_.GetWeakPtr(), std::move(js_callback));
frame_->GetTaskRunner(blink::TaskType::kInternalTest)
->PostTask(FROM_HERE, std::move(run_async));
}
void GCController::AsyncCollectAllWithEmptyStack(
v8::UniquePersistent<v8::Function> callback) {
v8::Isolate* const isolate = frame_->GetAgentGroupScheduler()->Isolate();
for (int i = 0; i < kNumberOfGCsForFullCollection; i++) {
isolate->RequestGarbageCollectionForTesting(
v8::Isolate::kFullGarbageCollection,
cppgc::EmbedderStackState::kNoHeapPointers);
}
v8::HandleScope scope(isolate);
v8::Local<v8::Function> func = callback.Get(isolate);
v8::Local<v8::Context> context = func->GetCreationContextChecked();
v8::Context::Scope context_scope(context);
v8::TryCatch try_catch(isolate);
v8::MicrotasksScope microtasks_scope(
isolate, context->GetMicrotaskQueue(),
v8::MicrotasksScope::kDoNotRunMicrotasks);
auto result = func->Call(context, context->Global(), 0, nullptr);
// Swallow potential exception.
std::ignore = result;
}
void GCController::MinorCollect(const gin::Arguments& args) {
args.isolate()->RequestGarbageCollectionForTesting(
v8::Isolate::kMinorGarbageCollection);
}
} // namespace content
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