1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "gin/public/isolate_holder.h" 6 7 #include <stdlib.h> 8 #include <string.h> 9 10 #include "base/logging.h" 11 #include "base/message_loop/message_loop.h" 12 #include "base/rand_util.h" 13 #include "base/sys_info.h" 14 #include "gin/array_buffer.h" 15 #include "gin/debug_impl.h" 16 #include "gin/function_template.h" 17 #include "gin/per_isolate_data.h" 18 #include "gin/public/v8_platform.h" 19 #include "gin/run_microtasks_observer.h" 20 21 namespace gin { 22 23 namespace { 24 25 v8::ArrayBuffer::Allocator* g_array_buffer_allocator = NULL; 26 27 bool GenerateEntropy(unsigned char* buffer, size_t amount) { 28 base::RandBytes(buffer, amount); 29 return true; 30 } 31 32 } // namespace 33 34 IsolateHolder::IsolateHolder() { 35 CHECK(g_array_buffer_allocator) 36 << "You need to invoke gin::IsolateHolder::Initialize first"; 37 v8::Isolate::CreateParams params; 38 params.entry_hook = DebugImpl::GetFunctionEntryHook(); 39 params.code_event_handler = DebugImpl::GetJitCodeEventHandler(); 40 params.constraints.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(), 41 base::SysInfo::AmountOfVirtualMemory(), 42 base::SysInfo::NumberOfProcessors()); 43 isolate_ = v8::Isolate::New(params); 44 isolate_data_.reset(new PerIsolateData(isolate_, g_array_buffer_allocator)); 45 } 46 47 IsolateHolder::~IsolateHolder() { 48 if (task_observer_.get()) 49 base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get()); 50 isolate_data_.reset(); 51 isolate_->Dispose(); 52 } 53 54 // static 55 void IsolateHolder::Initialize(ScriptMode mode, 56 v8::ArrayBuffer::Allocator* allocator) { 57 CHECK(allocator); 58 static bool v8_is_initialized = false; 59 if (v8_is_initialized) 60 return; 61 v8::V8::InitializePlatform(V8Platform::Get()); 62 v8::V8::SetArrayBufferAllocator(allocator); 63 g_array_buffer_allocator = allocator; 64 if (mode == gin::IsolateHolder::kStrictMode) { 65 static const char v8_flags[] = "--use_strict"; 66 v8::V8::SetFlagsFromString(v8_flags, sizeof(v8_flags) - 1); 67 } 68 v8::V8::SetEntropySource(&GenerateEntropy); 69 v8::V8::Initialize(); 70 v8_is_initialized = true; 71 } 72 73 void IsolateHolder::AddRunMicrotasksObserver() { 74 DCHECK(!task_observer_.get()); 75 task_observer_.reset(new RunMicrotasksObserver(isolate_));; 76 base::MessageLoop::current()->AddTaskObserver(task_observer_.get()); 77 } 78 79 void IsolateHolder::RemoveRunMicrotasksObserver() { 80 DCHECK(task_observer_.get()); 81 base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get()); 82 task_observer_.reset(); 83 } 84 85 } // namespace gin 86
