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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "v8/include/v8.h"
#include "webkit/glue/webkit_glue.h"
#include "webkit/tools/test_shell/test_shell.h"
#include "webkit/tools/test_shell/test_shell_test.h"
static const char kHeapSampleBegin[] = "heap-sample-begin,";
static const char kHeapObjectLogEntryPrefix[] = "\nheap-js-cons-item,";
static const char kHeapObjectLogEntrySuffix[] = ",";
class ListenerLeakTest : public TestShellTest {
};
static std::string GetV8Log(int skip) {
std::string v8_log;
char buf[2048];
int read_size;
do {
read_size = v8::V8::GetLogLines(skip + static_cast<int>(v8_log.size()),
buf, sizeof(buf));
v8_log.append(buf, read_size);
} while (read_size > 0);
return v8_log;
}
static int GetNumObjects(int log_skip, const std::string& constructor) {
std::string v8_log = GetV8Log(log_skip);
size_t sample_begin = v8_log.rfind(kHeapSampleBegin);
CHECK(sample_begin != std::string::npos);
std::string log_entry =
kHeapObjectLogEntryPrefix + constructor + kHeapObjectLogEntrySuffix;
size_t i = v8_log.find(log_entry, sample_begin);
if (i == std::string::npos) return 0;
i += log_entry.size();
size_t j = v8_log.find(",", i);
CHECK(j != std::string::npos);
int num_objects;
CHECK(StringToInt(v8_log.substr(i, j - i), &num_objects));
return num_objects;
}
// This test tries to create a reference cycle between node and its listener.
// See http://crbug/17400.
TEST_F(ListenerLeakTest, ReferenceCycle) {
const int log_skip = static_cast<int>(GetV8Log(0).size());
FilePath listener_file;
ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &listener_file));
listener_file = listener_file.Append(FILE_PATH_LITERAL("webkit"))
.Append(FILE_PATH_LITERAL("data"))
.Append(FILE_PATH_LITERAL("listener"))
.Append(FILE_PATH_LITERAL("listener_leak1.html"));
test_shell_->LoadFile(listener_file);
test_shell_->WaitTestFinished();
ASSERT_EQ(0, GetNumObjects(log_skip, "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) {
const int log_skip = static_cast<int>(GetV8Log(0).size());
FilePath listener_file;
ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &listener_file));
listener_file = listener_file.Append(FILE_PATH_LITERAL("webkit"))
.Append(FILE_PATH_LITERAL("data"))
.Append(FILE_PATH_LITERAL("listener"))
.Append(FILE_PATH_LITERAL("listener_leak2.html"));
test_shell_->LoadFile(listener_file);
test_shell_->WaitTestFinished();
ASSERT_EQ(1, GetNumObjects(log_skip, "EventListenerLeakTestObject2"));
}
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