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                                        base::SysInfo::NumberOfProcessors());
  34   isolate_ = v8::Isolate::New(params);
  35   isolate_data_.reset(new PerIsolateData(isolate_, allocator));
  36 #if defined(OS_WIN)
  37   {
  38     void* code_range;
  39     size_t size;
  40     isolate_->GetCodeRange(&code_range, &size);
  41     Debug::CodeRangeCreatedCallback callback =
  42         DebugImpl::GetCodeRangeCreatedCallback();
  43     if (code_range && size && callback)
  44       callback(code_range, size);
  45   }
  46 #endif
  47 }
  48
  49 IsolateHolder::~IsolateHolder() {
  50   if (task_observer_.get())
  51     base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get());
  52 #if defined(OS_WIN)
  53   {
  54     void* code_range;
  55     size_t size;
  56     isolate_->GetCodeRange(&code_range, &size);
  57     Debug::CodeRangeDeletedCallback callback =
  58         DebugImpl::GetCodeRangeDeletedCallback();
  59     if (code_range && callback)
  60       callback(code_range);
  61   }
  62 #endif
  63   isolate_data_.reset();
  64   isolate_->Dispose();
  65   isolate_ = NULL;
  66 }
  67
  68 // static
  69 void IsolateHolder::Initialize(ScriptMode mode,
  70                                v8::ArrayBuffer::Allocator* allocator) {
  71   CHECK(allocator);
  72   gin::V8Initializer::Initialize(mode, allocator);
  73   g_array_buffer_allocator = allocator;
  74 }
  75
  76 void IsolateHolder::AddRunMicrotasksObserver() {
  77   DCHECK(!task_observer_.get());
  78   task_observer_.reset(new RunMicrotasksObserver(isolate_));;
  79   base::MessageLoop::current()->AddTaskObserver(task_observer_.get());
  80 }
  81
  82 void IsolateHolder::RemoveRunMicrotasksObserver() {
  83   DCHECK(task_observer_.get());
  84   base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get());
  85   task_observer_.reset();
  86 }
  87
  88 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
  89
  90 // static
  91 bool IsolateHolder::LoadV8Snapshot() {
  92   return V8Initializer::LoadV8Snapshot();
  93 }
  94
  95 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
  96
  97 }  // namespace gin