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// Copyright 2013 The Chromium 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 "gin/public/isolate_holder.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <memory>
#include <utility>
#include "base/check_op.h"
#include "base/single_thread_task_runner.h"
#include "base/system/sys_info.h"
#include "base/task/current_thread.h"
#include "base/threading/thread_task_runner_handle.h"
#include "build/build_config.h"
#include "gin/debug_impl.h"
#include "gin/function_template.h"
#include "gin/per_isolate_data.h"
#include "gin/v8_initializer.h"
#include "gin/v8_isolate_memory_dump_provider.h"
#include "gin/v8_shared_memory_dump_provider.h"
namespace gin {
namespace {
v8::ArrayBuffer::Allocator* g_array_buffer_allocator = nullptr;
const intptr_t* g_reference_table = nullptr;
} // namespace
IsolateHolder::IsolateHolder(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
IsolateType isolate_type)
: IsolateHolder(std::move(task_runner),
AccessMode::kSingleThread,
isolate_type) {}
IsolateHolder::IsolateHolder(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
AccessMode access_mode,
IsolateType isolate_type)
: IsolateHolder(std::move(task_runner),
access_mode,
kAllowAtomicsWait,
isolate_type,
IsolateCreationMode::kNormal) {}
IsolateHolder::IsolateHolder(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
AccessMode access_mode,
AllowAtomicsWaitMode atomics_wait_mode,
IsolateType isolate_type,
IsolateCreationMode isolate_creation_mode)
: access_mode_(access_mode), isolate_type_(isolate_type) {
DCHECK(task_runner);
DCHECK(task_runner->BelongsToCurrentThread());
v8::ArrayBuffer::Allocator* allocator = g_array_buffer_allocator;
CHECK(allocator) << "You need to invoke gin::IsolateHolder::Initialize first";
isolate_ = v8::Isolate::Allocate();
isolate_data_ = std::make_unique<PerIsolateData>(isolate_, allocator,
access_mode_, task_runner);
if (isolate_creation_mode == IsolateCreationMode::kCreateSnapshot) {
// This branch is called when creating a V8 snapshot for Blink.
// Note SnapshotCreator calls isolate->Enter() in its construction.
snapshot_creator_ =
std::make_unique<v8::SnapshotCreator>(isolate_, g_reference_table);
DCHECK_EQ(isolate_, snapshot_creator_->GetIsolate());
} else {
v8::Isolate::CreateParams params;
params.code_event_handler = DebugImpl::GetJitCodeEventHandler();
params.constraints.ConfigureDefaults(
base::SysInfo::AmountOfPhysicalMemory(),
base::SysInfo::AmountOfVirtualMemory());
params.array_buffer_allocator = allocator;
params.allow_atomics_wait =
atomics_wait_mode == AllowAtomicsWaitMode::kAllowAtomicsWait;
params.external_references = g_reference_table;
params.only_terminate_in_safe_scope = true;
params.embedder_wrapper_type_index = kWrapperInfoIndex;
params.embedder_wrapper_object_index = kEncodedValueIndex;
v8::Isolate::Initialize(isolate_, params);
}
// This will attempt register the shared memory dump provider for every
// IsolateHolder, but only the first registration will have any effect.
gin::V8SharedMemoryDumpProvider::Register();
isolate_memory_dump_provider_ =
std::make_unique<V8IsolateMemoryDumpProvider>(this, task_runner);
}
IsolateHolder::~IsolateHolder() {
isolate_memory_dump_provider_.reset();
isolate_data_.reset();
isolate_->Dispose();
isolate_ = nullptr;
}
// static
void IsolateHolder::Initialize(ScriptMode mode,
v8::ArrayBuffer::Allocator* allocator,
const intptr_t* reference_table) {
CHECK(allocator);
V8Initializer::Initialize(mode);
g_array_buffer_allocator = allocator;
g_reference_table = reference_table;
}
void IsolateHolder::EnableIdleTasks(
std::unique_ptr<V8IdleTaskRunner> idle_task_runner) {
DCHECK(isolate_data_.get());
isolate_data_->EnableIdleTasks(std::move(idle_task_runner));
}
} // namespace gin
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