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.
5 #include "gin/public/isolate_holder.h"
10 #include "base/logging.h"
11 #include "base/rand_util.h"
12 #include "base/sys_info.h"
13 #include "gin/array_buffer.h"
14 #include "gin/function_template.h"
15 #include "gin/per_isolate_data.h"
16 #include "gin/public/v8_platform.h"
22 bool GenerateEntropy(unsigned char* buffer
, size_t amount
) {
23 base::RandBytes(buffer
, amount
);
27 void EnsureV8Initialized(gin::IsolateHolder::ScriptMode mode
,
29 static bool v8_is_initialized
= false;
30 static bool v8_is_gin_managed
= false;
31 if (v8_is_initialized
) {
32 CHECK_EQ(v8_is_gin_managed
, gin_managed
);
35 v8_is_initialized
= true;
36 v8_is_gin_managed
= gin_managed
;
40 v8::V8::InitializePlatform(V8Platform::Get());
41 v8::V8::SetArrayBufferAllocator(ArrayBufferAllocator::SharedInstance());
42 if (mode
== gin::IsolateHolder::kStrictMode
) {
43 static const char v8_flags
[] = "--use_strict";
44 v8::V8::SetFlagsFromString(v8_flags
, sizeof(v8_flags
) - 1);
46 v8::V8::SetEntropySource(&GenerateEntropy
);
52 IsolateHolder::IsolateHolder(ScriptMode mode
)
53 : isolate_owner_(true) {
54 EnsureV8Initialized(mode
, true);
55 isolate_
= v8::Isolate::New();
56 v8::ResourceConstraints constraints
;
57 constraints
.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(),
58 base::SysInfo::AmountOfVirtualMemory(),
59 base::SysInfo::NumberOfProcessors());
60 v8::SetResourceConstraints(isolate_
, &constraints
);
61 Init(ArrayBufferAllocator::SharedInstance());
64 IsolateHolder::IsolateHolder(v8::Isolate
* isolate
,
65 v8::ArrayBuffer::Allocator
* allocator
)
66 : isolate_owner_(false), isolate_(isolate
) {
67 EnsureV8Initialized(kNonStrictMode
, false);
71 IsolateHolder::~IsolateHolder() {
72 isolate_data_
.reset();
77 void IsolateHolder::Init(v8::ArrayBuffer::Allocator
* allocator
) {
78 v8::Isolate::Scope
isolate_scope(isolate_
);
79 v8::HandleScope
handle_scope(isolate_
);
80 isolate_data_
.reset(new PerIsolateData(isolate_
, allocator
));