gin/isolate_holder.cc

   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/sys_info.h"
  13 #include "gin/debug_impl.h"
  14 #include "gin/function_template.h"
  15 #include "gin/per_isolate_data.h"
  16 #include "gin/run_microtasks_observer.h"
  17 #include "gin/v8_initializer.h"
  18 #include "gin/v8_isolate_memory_dump_provider.h"
  19
  20 namespace gin {
  21
  22 namespace {
  23 v8::ArrayBuffer::Allocator* g_array_buffer_allocator = nullptr;
  24 }  // namespace
  25
  26 IsolateHolder::IsolateHolder() : IsolateHolder(AccessMode::kSingleThread) {
  27 }
  28
  29 IsolateHolder::IsolateHolder(AccessMode access_mode)
  30     : access_mode_(access_mode) {
  31   v8::ArrayBuffer::Allocator* allocator = g_array_buffer_allocator;
  32   CHECK(allocator) << "You need to invoke gin::IsolateHolder::Initialize first";
  33   v8::Isolate::CreateParams params;
  34   params.entry_hook = DebugImpl::GetFunctionEntryHook();
  35   params.code_event_handler = DebugImpl::GetJitCodeEventHandler();
  36   params.constraints.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(),
  37                                        base::SysInfo::AmountOfVirtualMemory());
  38   params.array_buffer_allocator = allocator;
  39   isolate_ = v8::Isolate::New(params);
  40   isolate_data_.reset(new PerIsolateData(isolate_, allocator));
  41   isolate_memory_dump_provider_.reset(new V8IsolateMemoryDumpProvider(this));
  42 #if defined(OS_WIN)
  43   {
  44     void* code_range;
  45     size_t size;
  46     isolate_->GetCodeRange(&code_range, &size);
  47     Debug::CodeRangeCreatedCallback callback =
  48         DebugImpl::GetCodeRangeCreatedCallback();
  49     if (code_range && size && callback)
  50       callback(code_range, size);
  51   }
  52 #endif
  53 }
  54
  55 IsolateHolder::~IsolateHolder() {
  56   if (task_observer_.get())
  57     base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get());
  58 #if defined(OS_WIN)
  59   {
  60     void* code_range;
  61     size_t size;
  62     isolate_->GetCodeRange(&code_range, &size);
  63     Debug::CodeRangeDeletedCallback callback =
  64         DebugImpl::GetCodeRangeDeletedCallback();
  65     if (code_range && callback)
  66       callback(code_range);
  67   }
  68 #endif
  69   isolate_memory_dump_provider_.reset();
  70   isolate_data_.reset();
  71   isolate_->Dispose();
  72   isolate_ = NULL;
  73 }
  74
  75 // static
  76 void IsolateHolder::Initialize(ScriptMode mode,
  77                                v8::ArrayBuffer::Allocator* allocator) {
  78   CHECK(allocator);
  79   V8Initializer::Initialize(mode);
  80   g_array_buffer_allocator = allocator;
  81 }
  82
  83 void IsolateHolder::AddRunMicrotasksObserver() {
  84   DCHECK(!task_observer_.get());
  85   task_observer_.reset(new RunMicrotasksObserver(isolate_));;
  86   base::MessageLoop::current()->AddTaskObserver(task_observer_.get());
  87 }
  88
  89 void IsolateHolder::RemoveRunMicrotasksObserver() {
  90   DCHECK(task_observer_.get());
  91   base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get());
  92   task_observer_.reset();
  93 }
  94
  95 }  // namespace gin