[tracing] Add browser-side tests for memory dumps.

content/browser/tracing/memory_tracing_browsertest.cc

Index: content/browser/tracing/memory_tracing_browsertest.cc
diff --git a/content/browser/tracing/memory_tracing_browsertest.cc b/content/browser/tracing/memory_tracing_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..46468edbddf714d719736c1e5d4d34a41eb2ed22
--- /dev/null
+++ b/content/browser/tracing/memory_tracing_browsertest.cc
@@ -0,0 +1,212 @@
+// Copyright 2015 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/bind.h"
+#include "base/command_line.h"
+#include "base/run_loop.h"
+#include "base/thread_task_runner_handle.h"
+#include "base/trace_event/memory_dump_manager.h"
+#include "base/trace_event/memory_dump_provider.h"
+#include "base/trace_event/memory_dump_request_args.h"
+#include "content/public/browser/tracing_controller.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/test/browser_test_utils.h"
+#include "content/public/test/content_browser_test.h"
+#include "content/public/test/content_browser_test_utils.h"
+#include "content/shell/browser/shell.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using base::trace_event::MemoryDumpArgs;
+using base::trace_event::MemoryDumpManager;
+using base::trace_event::MemoryDumpType;
+using base::trace_event::ProcessMemoryDump;
+using testing::_;
+using testing::Return;
+
+namespace content {
+
+// A mock dump provider, used to check that dump requests actually end up
+// creating memory dumps.
+class MockDumpProvider : public base::trace_event::MemoryDumpProvider {
+ public:
+  MOCK_METHOD2(OnMemoryDump, bool(const MemoryDumpArgs& args,
+                                  ProcessMemoryDump* pmd));
+};
+
+class MemoryTracingTest : public ContentBrowserTest {
+ public:
+  void DoRequestGlobalDump(const base::trace_event::MemoryDumpCallback& cb) {
+    MemoryDumpArgs dump_args = { MemoryDumpArgs::LevelOfDetail::HIGH };
+    MemoryDumpManager::GetInstance()->RequestGlobalDump(
+        MemoryDumpType::EXPLICITLY_TRIGGERED, dump_args, cb);
+  }
+
+  // Used as callback argument for MemoryDumpManager::RequestGlobalDump():
+  void OnGlobalMemoryDumpDone(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      base::Closure closure,
+      uint64 dump_guid,
+      bool success) {
+    // Make sure we run the RunLoop closure on the same thread that originated
+    // the run loop (which is the IN_PROC_BROWSER_TEST_F main thread).
+    if (!task_runner->RunsTasksOnCurrentThread()) {
+      task_runner->PostTask(
+          FROM_HERE, base::Bind(&MemoryTracingTest::OnGlobalMemoryDumpDone,
+                                base::Unretained(this), task_runner, closure,
+                                dump_guid, success));
+      return;
+    }
+    ++callback_call_count_;
+    last_callback_dump_guid_ = dump_guid;
+    last_callback_success_ = success;
+    closure.Run();
+  }
+
+ protected:
+  void SetUp() override {
+    callback_call_count_ = 0;
+    last_callback_dump_guid_ = 0;
+    last_callback_success_ = false;
+    MemoryDumpManager::GetInstance()->Initialize();
+    mock_dump_provider_.reset(new MockDumpProvider());
+    MemoryDumpManager::GetInstance()->RegisterDumpProvider(
+        mock_dump_provider_.get());
+    ContentBrowserTest::SetUp();
+  }
+
+  void TearDown() override {
+    MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
+        mock_dump_provider_.get());
+    mock_dump_provider_.reset();
+    ContentBrowserTest::TearDown();
+  }
+
+  void EnableMemoryTracing() {
+    base::RunLoop run_loop;
+    std::string category_filter = MemoryDumpManager::kTraceCategoryForTesting;
+    base::trace_event::TraceConfig trace_config(category_filter, "");
+    bool success = TracingController::GetInstance()->EnableRecording(
+      trace_config, run_loop.QuitClosure());
+    EXPECT_TRUE(success);
+    run_loop.Run();
+  }
+
+  void DisableTracing() {
+    bool success = TracingController::GetInstance()->DisableRecording(NULL);
+    EXPECT_TRUE(success);
+    base::RunLoop().RunUntilIdle();
+  }
+
+  void RequestGlobalDumpAndWait(bool from_renderer_thread) {
+    base::RunLoop run_loop;
+    base::trace_event::MemoryDumpCallback callback = base::Bind(
+        &MemoryTracingTest::OnGlobalMemoryDumpDone, base::Unretained(this),
+        base::ThreadTaskRunnerHandle::Get(), run_loop.QuitClosure());
+    if (from_renderer_thread) {
+      PostTaskToInProcessRendererAndWait(
+          base::Bind(&MemoryTracingTest::DoRequestGlobalDump,
+                     base::Unretained(this), callback));
+    } else {
+      DoRequestGlobalDump(callback);
+    }
+    run_loop.Run();
+  }
+
+  void Navigate(Shell* shell) {
+    NavigateToURL(shell, GetTestUrl("", "title.html"));
+  }
+
+  base::Closure on_memory_dump_complete_closure_;
+  scoped_ptr<MockDumpProvider> mock_dump_provider_;
+  uint32 callback_call_count_;
+  uint64 last_callback_dump_guid_;
+  bool last_callback_success_;
+};
+
+class SingleProcessMemoryTracingTest : public MemoryTracingTest {
+ public:
+  SingleProcessMemoryTracingTest() {}
+
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    command_line->AppendSwitch(switches::kSingleProcess);
+  }
+};
+
+// Checks that a memory dump initiated from a the main browser thread ends up in
+// a single dump even in single process mode.
+IN_PROC_BROWSER_TEST_F(SingleProcessMemoryTracingTest,
+                       BrowserInitiatedSingleDump) {
+  Navigate(shell());
+
+  EXPECT_CALL(*mock_dump_provider_, OnMemoryDump(_,_)).WillOnce(Return(true));
+
+  EnableMemoryTracing();
+  RequestGlobalDumpAndWait(false /* from_renderer_thread */);
+  EXPECT_EQ(1u, callback_call_count_);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+  DisableTracing();
+}
+
+// Checks that a memory dump initiated from a renderer thread ends up in a
+// single dump even in single process mode.
+IN_PROC_BROWSER_TEST_F(SingleProcessMemoryTracingTest,
+                       RendererInitiatedSingleDump) {
+  Navigate(shell());
+
+  EXPECT_CALL(*mock_dump_provider_, OnMemoryDump(_,_)).WillOnce(Return(true));
+
+  EnableMemoryTracing();
+  RequestGlobalDumpAndWait(true /* from_renderer_thread */);
+  EXPECT_EQ(1u, callback_call_count_);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+  DisableTracing();
+}
+
+IN_PROC_BROWSER_TEST_F(SingleProcessMemoryTracingTest, ManyInterleavedDumps) {
+  Navigate(shell());
+
+  EXPECT_CALL(*mock_dump_provider_, OnMemoryDump(_,_))
+      .Times(4)
+      .WillRepeatedly(Return(true));
+
+  EnableMemoryTracing();
+
+  RequestGlobalDumpAndWait(true /* from_renderer_thread */);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+
+  RequestGlobalDumpAndWait(false /* from_renderer_thread */);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+
+  RequestGlobalDumpAndWait(false /* from_renderer_thread */);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+
+  RequestGlobalDumpAndWait(true /* from_renderer_thread */);
+  EXPECT_EQ(4u, callback_call_count_);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+
+  DisableTracing();
+}
+
+// Checks that a memory dump initiated from a the main browser thread ends up in
+// a successful dump.
+IN_PROC_BROWSER_TEST_F(MemoryTracingTest, BrowserInitiatedDump) {
+  Navigate(shell());
+
+  EXPECT_CALL(*mock_dump_provider_, OnMemoryDump(_,_)).WillOnce(Return(true));
+
+  EnableMemoryTracing();
+  RequestGlobalDumpAndWait(false /* from_renderer_thread */);
+  EXPECT_EQ(1u, callback_call_count_);
+  EXPECT_NE(0u, last_callback_dump_guid_);
+  EXPECT_TRUE(last_callback_success_);
+  DisableTracing();
+}
+
+}  // namespace content