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