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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/web_url_loader_mock_factory.h"
#include "third_party/blink/public/web/web_view.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_gc_controller.h"
#include "third_party/blink/renderer/core/frame/frame_test_helpers.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/url_test_helpers.h"
#include "v8/include/v8-profiler.h"
#include "v8/include/v8.h"
namespace blink {
namespace {
const v8::HeapGraphNode* GetProperty(v8::Isolate* isolate,
const v8::HeapGraphNode* node,
v8::HeapGraphEdge::Type type,
const char* name) {
for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = node->GetChild(i);
if (prop->GetType() == type) {
v8::String::Utf8Value prop_name(isolate, prop->GetName());
if (!strcmp(name, *prop_name))
return prop->GetToNode();
}
}
return nullptr;
}
int GetNumObjects(v8::Isolate* isolate, const char* constructor) {
v8::HandleScope scope(isolate);
v8::HeapProfiler* profiler = isolate->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = profiler->TakeHeapSnapshot();
if (!snapshot)
return -1;
int count = 0;
for (int i = 0; i < snapshot->GetNodesCount(); ++i) {
const v8::HeapGraphNode* node = snapshot->GetNode(i);
if (node->GetType() != v8::HeapGraphNode::kObject)
continue;
v8::String::Utf8Value node_name(isolate, node->GetName());
if (!strcmp(constructor, *node_name)) {
const v8::HeapGraphNode* constructor_prop = GetProperty(
isolate, node, v8::HeapGraphEdge::kProperty, "constructor");
// Skip an Object instance named after the constructor.
if (constructor_prop) {
v8::String::Utf8Value constructor_name(isolate,
constructor_prop->GetName());
if (!strcmp(constructor, *constructor_name))
continue;
}
++count;
}
}
return count;
}
} // namespace
class ListenerLeakTest : public testing::Test {
public:
void RunTestAndGC(const std::string& filename) {
std::string base_url("http://www.example.com/");
std::string file_name(filename);
url_test_helpers::RegisterMockedURLLoadFromBase(
WebString::FromUTF8(base_url), blink::test::CoreTestDataPath(),
WebString::FromUTF8(file_name));
web_view_helper.InitializeAndLoad(base_url + file_name);
V8GCController::CollectAllGarbageForTesting(
isolate(), v8::EmbedderHeapTracer::EmbedderStackState::kEmpty);
}
v8::Isolate* isolate() const {
return ToIsolate(web_view_helper.LocalMainFrame()->GetFrame());
}
void TearDown() override {
url_test_helpers::UnregisterAllURLsAndClearMemoryCache();
}
protected:
frame_test_helpers::WebViewHelper web_view_helper;
};
// This test tries to create a reference cycle between node and its listener.
// See http://crbug/17400.
TEST_F(ListenerLeakTest, ReferenceCycle) {
RunTestAndGC("listener/listener_leak1.html");
ASSERT_EQ(0, GetNumObjects(isolate(), "EventListenerLeakTestObject1"));
}
// This test sets node onclick many times to expose a possible memory
// leak where all listeners get referenced by the node.
TEST_F(ListenerLeakTest, HiddenReferences) {
RunTestAndGC("listener/listener_leak2.html");
ASSERT_EQ(1, GetNumObjects(isolate(), "EventListenerLeakTestObject2"));
}
} // namespace blink