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      1 // Copyright (c) 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 "base/command_line.h"
      6 #include "content/public/common/content_switches.h"
      7 #include "content/public/test/render_view_test.h"
      8 #include "content/renderer/render_view_impl.h"
      9 #include "gin/handle.h"
     10 #include "gin/per_isolate_data.h"
     11 #include "gin/wrappable.h"
     12 #include "testing/gtest/include/gtest/gtest.h"
     13 #include "third_party/WebKit/public/web/WebFrame.h"
     14 #include "third_party/WebKit/public/web/WebKit.h"
     15 #include "third_party/WebKit/public/web/WebView.h"
     16 
     17 namespace content {
     18 
     19 namespace {
     20 
     21 class TestGinObject : public gin::Wrappable<TestGinObject> {
     22  public:
     23   static gin::WrapperInfo kWrapperInfo;
     24 
     25   static gin::Handle<TestGinObject> Create(v8::Isolate* isolate, bool* alive) {
     26     return gin::CreateHandle(isolate, new TestGinObject(alive));
     27   }
     28 
     29  private:
     30   TestGinObject(bool* alive) : alive_(alive) { *alive_ = true; }
     31   virtual ~TestGinObject() { *alive_ = false; }
     32 
     33   bool* alive_;
     34 
     35   DISALLOW_COPY_AND_ASSIGN(TestGinObject);
     36 };
     37 
     38 gin::WrapperInfo TestGinObject::kWrapperInfo = { gin::kEmbedderNativeGin };
     39 
     40 void RegisterTemplates(v8::Isolate* isolate) {
     41   gin::PerIsolateData* data = gin::PerIsolateData::From(isolate);
     42 
     43   v8::Handle<v8::ObjectTemplate> templ = v8::ObjectTemplate::New(isolate);
     44   templ->SetInternalFieldCount(gin::kNumberOfInternalFields);
     45   data->SetObjectTemplate(&TestGinObject::kWrapperInfo, templ);
     46 }
     47 
     48 class GinBrowserTest : public RenderViewTest {
     49  public:
     50   GinBrowserTest() {}
     51   virtual ~GinBrowserTest() {}
     52 
     53   virtual void SetUp() OVERRIDE {
     54     CommandLine::ForCurrentProcess()->AppendSwitchASCII(
     55         switches::kJavaScriptFlags, "--expose_gc");
     56 
     57     RenderViewTest::SetUp();
     58   }
     59 
     60  private:
     61 
     62   DISALLOW_COPY_AND_ASSIGN(GinBrowserTest);
     63 };
     64 
     65 // Test that garbage collection doesn't crash if a gin-wrapped object is
     66 // present.
     67 TEST_F(GinBrowserTest, GinAndGarbageCollection) {
     68   LoadHTML("<!doctype html>");
     69 
     70   bool alive = false;
     71 
     72   {
     73     v8::Isolate* isolate = blink::mainThreadIsolate();
     74     v8::HandleScope handle_scope(isolate);
     75     v8::Context::Scope context_scope(
     76         view_->GetWebView()->mainFrame()->mainWorldScriptContext());
     77 
     78     RegisterTemplates(isolate);
     79 
     80     // We create the object inside a scope so it's not kept alive by a handle
     81     // on the stack.
     82     TestGinObject::Create(isolate, &alive);
     83   }
     84 
     85   CHECK(alive);
     86 
     87   // Should not crash.
     88   v8::V8::LowMemoryNotification();
     89 
     90   CHECK(!alive);
     91 }
     92 
     93 } // namespace
     94 
     95 }  // namespace content
     96