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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 <stdlib.h>
#include <string.h>
#include "base/logging.h"
#include "base/rand_util.h"
#include "base/sys_info.h"
#include "gin/array_buffer.h"
#include "gin/function_template.h"
#include "gin/per_isolate_data.h"
#include "gin/public/v8_platform.h"
namespace gin {
namespace {
bool GenerateEntropy(unsigned char* buffer, size_t amount) {
base::RandBytes(buffer, amount);
return true;
}
void EnsureV8Initialized(gin::IsolateHolder::ScriptMode mode,
bool gin_managed) {
static bool v8_is_initialized = false;
static bool v8_is_gin_managed = false;
if (v8_is_initialized) {
CHECK_EQ(v8_is_gin_managed, gin_managed);
return;
}
v8_is_initialized = true;
v8_is_gin_managed = gin_managed;
if (!gin_managed)
return;
v8::V8::InitializePlatform(V8Platform::Get());
v8::V8::SetArrayBufferAllocator(ArrayBufferAllocator::SharedInstance());
if (mode == gin::IsolateHolder::kStrictMode) {
static const char v8_flags[] = "--use_strict";
v8::V8::SetFlagsFromString(v8_flags, sizeof(v8_flags) - 1);
}
v8::V8::SetEntropySource(&GenerateEntropy);
v8::V8::Initialize();
}
} // namespace
IsolateHolder::IsolateHolder(ScriptMode mode)
: isolate_owner_(true) {
EnsureV8Initialized(mode, true);
isolate_ = v8::Isolate::New();
v8::ResourceConstraints constraints;
constraints.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(),
base::SysInfo::AmountOfVirtualMemory(),
base::SysInfo::NumberOfProcessors());
v8::SetResourceConstraints(isolate_, &constraints);
Init(ArrayBufferAllocator::SharedInstance());
}
IsolateHolder::IsolateHolder(v8::Isolate* isolate,
v8::ArrayBuffer::Allocator* allocator)
: isolate_owner_(false), isolate_(isolate) {
EnsureV8Initialized(kNonStrictMode, false);
Init(allocator);
}
IsolateHolder::~IsolateHolder() {
isolate_data_.reset();
if (isolate_owner_)
isolate_->Dispose();
}
void IsolateHolder::Init(v8::ArrayBuffer::Allocator* allocator) {
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
isolate_data_.reset(new PerIsolateData(isolate_, allocator));
}
} // namespace gin
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