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// Copyright 2016 the V8 project 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 "test/inspector/task-runner.h"
#include "test/inspector/inspector-impl.h"
#if !defined(_WIN32) && !defined(_WIN64)
#include <unistd.h> // NOLINT
#endif // !defined(_WIN32) && !defined(_WIN64)
namespace {
const int kTaskRunnerIndex = 2;
void ReportUncaughtException(v8::Isolate* isolate,
const v8::TryCatch& try_catch) {
CHECK(try_catch.HasCaught());
v8::HandleScope handle_scope(isolate);
std::string message = *v8::String::Utf8Value(try_catch.Message()->Get());
fprintf(stderr, "Unhandle exception: %s\n", message.data());
}
} // namespace
TaskRunner::TaskRunner(v8::ExtensionConfiguration* extensions,
bool catch_exceptions,
v8::base::Semaphore* ready_semaphore)
: Thread(Options("Task Runner")),
extensions_(extensions),
catch_exceptions_(catch_exceptions),
ready_semaphore_(ready_semaphore),
isolate_(nullptr),
process_queue_semaphore_(0),
nested_loop_count_(0) {
Start();
}
TaskRunner::~TaskRunner() { Join(); }
void TaskRunner::InitializeContext() {
v8::Isolate::CreateParams params;
params.array_buffer_allocator =
v8::ArrayBuffer::Allocator::NewDefaultAllocator();
isolate_ = v8::Isolate::New(params);
isolate_->SetMicrotasksPolicy(v8::MicrotasksPolicy::kScoped);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
v8::Local<v8::ObjectTemplate> global_template =
v8::ObjectTemplate::New(isolate_);
v8::Local<v8::Context> context =
v8::Context::New(isolate_, extensions_, global_template);
context->SetAlignedPointerInEmbedderData(kTaskRunnerIndex, this);
context_.Reset(isolate_, context);
if (ready_semaphore_) ready_semaphore_->Signal();
}
void TaskRunner::Run() {
InitializeContext();
RunMessageLoop(false);
}
void TaskRunner::RunMessageLoop(bool only_protocol) {
int loop_number = ++nested_loop_count_;
while (nested_loop_count_ == loop_number && !is_terminated_.Value()) {
TaskRunner::Task* task = GetNext(only_protocol);
if (!task) return;
v8::Isolate::Scope isolate_scope(isolate_);
if (catch_exceptions_) {
v8::TryCatch try_catch(isolate_);
task->Run(isolate_, context_);
delete task;
if (try_catch.HasCaught()) {
ReportUncaughtException(isolate_, try_catch);
fflush(stdout);
fflush(stderr);
_exit(0);
}
} else {
task->Run(isolate_, context_);
delete task;
}
}
}
void TaskRunner::QuitMessageLoop() {
DCHECK(nested_loop_count_ > 0);
--nested_loop_count_;
}
void TaskRunner::Append(Task* task) {
queue_.Enqueue(task);
process_queue_semaphore_.Signal();
}
void TaskRunner::Terminate() {
is_terminated_.Increment(1);
process_queue_semaphore_.Signal();
}
TaskRunner::Task* TaskRunner::GetNext(bool only_protocol) {
for (;;) {
if (is_terminated_.Value()) return nullptr;
if (only_protocol) {
Task* task = nullptr;
if (queue_.Dequeue(&task)) {
if (task->is_inspector_task()) return task;
deffered_queue_.Enqueue(task);
}
} else {
Task* task = nullptr;
if (deffered_queue_.Dequeue(&task)) return task;
if (queue_.Dequeue(&task)) return task;
}
process_queue_semaphore_.Wait();
}
return nullptr;
}
TaskRunner* TaskRunner::FromContext(v8::Local<v8::Context> context) {
return static_cast<TaskRunner*>(
context->GetAlignedPointerFromEmbedderData(kTaskRunnerIndex));
}
namespace {
v8::internal::Vector<uint16_t> ToVector(v8::Local<v8::String> str) {
v8::internal::Vector<uint16_t> buffer =
v8::internal::Vector<uint16_t>::New(str->Length());
str->Write(buffer.start(), 0, str->Length());
return buffer;
}
} // namespace
AsyncTask::AsyncTask(const char* task_name,
v8_inspector::V8Inspector* inspector)
: inspector_(task_name ? inspector : nullptr) {
if (inspector_) {
inspector_->asyncTaskScheduled(
v8_inspector::StringView(reinterpret_cast<const uint8_t*>(task_name),
strlen(task_name)),
this, false);
}
}
void AsyncTask::Run(v8::Isolate* isolate,
const v8::Global<v8::Context>& context) {
if (inspector_) inspector_->asyncTaskStarted(this);
AsyncRun(isolate, context);
if (inspector_) inspector_->asyncTaskFinished(this);
}
ExecuteStringTask::ExecuteStringTask(
const v8::internal::Vector<uint16_t>& expression,
v8::Local<v8::String> name, v8::Local<v8::Integer> line_offset,
v8::Local<v8::Integer> column_offset, const char* task_name,
v8_inspector::V8Inspector* inspector)
: AsyncTask(task_name, inspector),
expression_(expression),
name_(ToVector(name)),
line_offset_(line_offset.As<v8::Int32>()->Value()),
column_offset_(column_offset.As<v8::Int32>()->Value()) {}
ExecuteStringTask::ExecuteStringTask(
const v8::internal::Vector<const char>& expression)
: AsyncTask(nullptr, nullptr),
expression_utf8_(expression),
line_offset_(0),
column_offset_(0) {}
void ExecuteStringTask::AsyncRun(v8::Isolate* isolate,
const v8::Global<v8::Context>& context) {
v8::MicrotasksScope microtasks_scope(isolate,
v8::MicrotasksScope::kRunMicrotasks);
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> local_context = context.Get(isolate);
v8::Context::Scope context_scope(local_context);
v8::Local<v8::String> name =
v8::String::NewFromTwoByte(isolate, name_.start(),
v8::NewStringType::kNormal, name_.length())
.ToLocalChecked();
v8::Local<v8::Integer> line_offset = v8::Integer::New(isolate, line_offset_);
v8::Local<v8::Integer> column_offset =
v8::Integer::New(isolate, column_offset_);
v8::ScriptOrigin origin(name, line_offset, column_offset);
v8::Local<v8::String> source;
if (expression_.length()) {
source = v8::String::NewFromTwoByte(isolate, expression_.start(),
v8::NewStringType::kNormal,
expression_.length())
.ToLocalChecked();
} else {
source = v8::String::NewFromUtf8(isolate, expression_utf8_.start(),
v8::NewStringType::kNormal,
expression_utf8_.length())
.ToLocalChecked();
}
v8::ScriptCompiler::Source scriptSource(source, origin);
v8::Local<v8::Script> script;
if (!v8::ScriptCompiler::Compile(local_context, &scriptSource)
.ToLocal(&script))
return;
v8::MaybeLocal<v8::Value> result;
result = script->Run(local_context);
}
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