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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/debug_impl.h"
#include "gin/function_template.h"
#include "gin/per_isolate_data.h"
#include "gin/public/v8_platform.h"
namespace gin {
namespace {
v8::ArrayBuffer::Allocator* g_array_buffer_allocator = NULL;
bool GenerateEntropy(unsigned char* buffer, size_t amount) {
base::RandBytes(buffer, amount);
return true;
}
} // namespace
IsolateHolder::IsolateHolder() {
CHECK(g_array_buffer_allocator)
<< "You need to invoke gin::IsolateHolder::Initialize first";
v8::Isolate::CreateParams params;
params.entry_hook = DebugImpl::GetFunctionEntryHook();
params.code_event_handler = DebugImpl::GetJitCodeEventHandler();
isolate_ = v8::Isolate::New(params);
v8::ResourceConstraints constraints;
constraints.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(),
base::SysInfo::AmountOfVirtualMemory(),
base::SysInfo::NumberOfProcessors());
v8::SetResourceConstraints(isolate_, &constraints);
isolate_data_.reset(new PerIsolateData(isolate_, g_array_buffer_allocator));
}
IsolateHolder::~IsolateHolder() {
isolate_data_.reset();
isolate_->Dispose();
}
// static
void IsolateHolder::Initialize(ScriptMode mode,
v8::ArrayBuffer::Allocator* allocator) {
CHECK(allocator);
static bool v8_is_initialized = false;
if (v8_is_initialized)
return;
v8::V8::InitializePlatform(V8Platform::Get());
v8::V8::SetArrayBufferAllocator(allocator);
g_array_buffer_allocator = allocator;
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();
v8_is_initialized = true;
}
} // namespace gin
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