Initial import.

1 files changed, 581 insertions, 0 deletions

diff --git a/chromium/base/tracked_objects_unittest.cc b/chromium/base/tracked_objects_unittest.cc
new file mode 100644
index 00000000000..d2654c7cd18
--- /dev/null
+++ b/chromium/base/tracked_objects_unittest.cc
@@ -0,0 +1,581 @@
+// Copyright (c) 2012 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.
+
+// Test of classes in the tracked_objects.h classes.
+
+#include "base/tracked_objects.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/process/process_handle.h"
+#include "base/time/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+const int kLineNumber = 1776;
+const char kFile[] = "FixedUnitTestFileName";
+const char kWorkerThreadName[] = "WorkerThread-1";
+const char kMainThreadName[] = "SomeMainThreadName";
+const char kStillAlive[] = "Still_Alive";
+
+namespace tracked_objects {
+
+class TrackedObjectsTest : public testing::Test {
+ protected:
+  TrackedObjectsTest() {
+    // On entry, leak any database structures in case they are still in use by
+    // prior threads.
+    ThreadData::ShutdownSingleThreadedCleanup(true);
+  }
+
+  virtual ~TrackedObjectsTest() {
+    // We should not need to leak any structures we create, since we are
+    // single threaded, and carefully accounting for items.
+    ThreadData::ShutdownSingleThreadedCleanup(false);
+  }
+
+  // Reset the profiler state.
+  void Reset() {
+    ThreadData::ShutdownSingleThreadedCleanup(false);
+  }
+
+  // Simulate a birth on the thread named |thread_name|, at the given
+  // |location|.
+  void TallyABirth(const Location& location, const std::string& thread_name) {
+    // If the |thread_name| is empty, we don't initialize system with a thread
+    // name, so we're viewed as a worker thread.
+    if (!thread_name.empty())
+      ThreadData::InitializeThreadContext(kMainThreadName);
+
+    // Do not delete |birth|.  We don't own it.
+    Births* birth = ThreadData::TallyABirthIfActive(location);
+
+    if (ThreadData::status() == ThreadData::DEACTIVATED)
+      EXPECT_EQ(reinterpret_cast<Births*>(NULL), birth);
+    else
+      EXPECT_NE(reinterpret_cast<Births*>(NULL), birth);
+  }
+
+  // Helper function to verify the most common test expectations.
+  void ExpectSimpleProcessData(const ProcessDataSnapshot& process_data,
+                               const std::string& function_name,
+                               const std::string& birth_thread,
+                               const std::string& death_thread,
+                               int count,
+                               int run_ms,
+                               int queue_ms) {
+    ASSERT_EQ(1u, process_data.tasks.size());
+
+    EXPECT_EQ(kFile, process_data.tasks[0].birth.location.file_name);
+    EXPECT_EQ(function_name,
+              process_data.tasks[0].birth.location.function_name);
+    EXPECT_EQ(kLineNumber, process_data.tasks[0].birth.location.line_number);
+
+    EXPECT_EQ(birth_thread, process_data.tasks[0].birth.thread_name);
+
+    EXPECT_EQ(count, process_data.tasks[0].death_data.count);
+    EXPECT_EQ(count * run_ms,
+              process_data.tasks[0].death_data.run_duration_sum);
+    EXPECT_EQ(run_ms, process_data.tasks[0].death_data.run_duration_max);
+    EXPECT_EQ(run_ms, process_data.tasks[0].death_data.run_duration_sample);
+    EXPECT_EQ(count * queue_ms,
+              process_data.tasks[0].death_data.queue_duration_sum);
+    EXPECT_EQ(queue_ms, process_data.tasks[0].death_data.queue_duration_max);
+    EXPECT_EQ(queue_ms, process_data.tasks[0].death_data.queue_duration_sample);
+
+    EXPECT_EQ(death_thread, process_data.tasks[0].death_thread_name);
+
+    EXPECT_EQ(0u, process_data.descendants.size());
+
+    EXPECT_EQ(base::GetCurrentProcId(), process_data.process_id);
+  }
+};
+
+TEST_F(TrackedObjectsTest, MinimalStartupShutdown) {
+  // Minimal test doesn't even create any tasks.
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  EXPECT_FALSE(ThreadData::first());  // No activity even on this thread.
+  ThreadData* data = ThreadData::Get();
+  EXPECT_TRUE(ThreadData::first());  // Now class was constructed.
+  ASSERT_TRUE(data);
+  EXPECT_FALSE(data->next());
+  EXPECT_EQ(data, ThreadData::Get());
+  ThreadData::BirthMap birth_map;
+  ThreadData::DeathMap death_map;
+  ThreadData::ParentChildSet parent_child_set;
+  data->SnapshotMaps(false, &birth_map, &death_map, &parent_child_set);
+  EXPECT_EQ(0u, birth_map.size());
+  EXPECT_EQ(0u, death_map.size());
+  EXPECT_EQ(0u, parent_child_set.size());
+
+  // Clean up with no leaking.
+  Reset();
+
+  // Do it again, just to be sure we reset state completely.
+  EXPECT_TRUE(ThreadData::InitializeAndSetTrackingStatus(
+      ThreadData::PROFILING_CHILDREN_ACTIVE));
+  EXPECT_FALSE(ThreadData::first());  // No activity even on this thread.
+  data = ThreadData::Get();
+  EXPECT_TRUE(ThreadData::first());  // Now class was constructed.
+  ASSERT_TRUE(data);
+  EXPECT_FALSE(data->next());
+  EXPECT_EQ(data, ThreadData::Get());
+  birth_map.clear();
+  death_map.clear();
+  parent_child_set.clear();
+  data->SnapshotMaps(false, &birth_map, &death_map, &parent_child_set);
+  EXPECT_EQ(0u, birth_map.size());
+  EXPECT_EQ(0u, death_map.size());
+  EXPECT_EQ(0u, parent_child_set.size());
+}
+
+TEST_F(TrackedObjectsTest, TinyStartupShutdown) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  // Instigate tracking on a single tracked object, on our thread.
+  const char kFunction[] = "TinyStartupShutdown";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  Births* first_birth = ThreadData::TallyABirthIfActive(location);
+
+  ThreadData* data = ThreadData::first();
+  ASSERT_TRUE(data);
+  EXPECT_FALSE(data->next());
+  EXPECT_EQ(data, ThreadData::Get());
+  ThreadData::BirthMap birth_map;
+  ThreadData::DeathMap death_map;
+  ThreadData::ParentChildSet parent_child_set;
+  data->SnapshotMaps(false, &birth_map, &death_map, &parent_child_set);
+  EXPECT_EQ(1u, birth_map.size());                         // 1 birth location.
+  EXPECT_EQ(1, birth_map.begin()->second->birth_count());  // 1 birth.
+  EXPECT_EQ(0u, death_map.size());                         // No deaths.
+  EXPECT_EQ(0u, parent_child_set.size());                  // No children.
+
+
+  // Now instigate another birth, while we are timing the run of the first
+  // execution.
+  ThreadData::NowForStartOfRun(first_birth);
+  // Create a child (using the same birth location).
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TimeTicks kBogusBirthTime;
+  base::TrackingInfo pending_task(location, kBogusBirthTime);
+  TrackedTime start_time(pending_task.time_posted);
+  // Finally conclude the outer run.
+  TrackedTime end_time = ThreadData::NowForEndOfRun();
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task, start_time,
+                                              end_time);
+
+  birth_map.clear();
+  death_map.clear();
+  parent_child_set.clear();
+  data->SnapshotMaps(false, &birth_map, &death_map, &parent_child_set);
+  EXPECT_EQ(1u, birth_map.size());                         // 1 birth location.
+  EXPECT_EQ(2, birth_map.begin()->second->birth_count());  // 2 births.
+  EXPECT_EQ(1u, death_map.size());                         // 1 location.
+  EXPECT_EQ(1, death_map.begin()->second.count());         // 1 death.
+  if (ThreadData::TrackingParentChildStatus()) {
+    EXPECT_EQ(1u, parent_child_set.size());                  // 1 child.
+    EXPECT_EQ(parent_child_set.begin()->first,
+              parent_child_set.begin()->second);
+  } else {
+    EXPECT_EQ(0u, parent_child_set.size());                  // no stats.
+  }
+
+  // The births were at the same location as the one known death.
+  EXPECT_EQ(birth_map.begin()->second, death_map.begin()->first);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+
+  const int32 time_elapsed = (end_time - start_time).InMilliseconds();
+  ASSERT_EQ(1u, process_data.tasks.size());
+  EXPECT_EQ(kFile, process_data.tasks[0].birth.location.file_name);
+  EXPECT_EQ(kFunction, process_data.tasks[0].birth.location.function_name);
+  EXPECT_EQ(kLineNumber, process_data.tasks[0].birth.location.line_number);
+  EXPECT_EQ(kWorkerThreadName, process_data.tasks[0].birth.thread_name);
+  EXPECT_EQ(1, process_data.tasks[0].death_data.count);
+  EXPECT_EQ(time_elapsed, process_data.tasks[0].death_data.run_duration_sum);
+  EXPECT_EQ(time_elapsed, process_data.tasks[0].death_data.run_duration_max);
+  EXPECT_EQ(time_elapsed, process_data.tasks[0].death_data.run_duration_sample);
+  EXPECT_EQ(0, process_data.tasks[0].death_data.queue_duration_sum);
+  EXPECT_EQ(0, process_data.tasks[0].death_data.queue_duration_max);
+  EXPECT_EQ(0, process_data.tasks[0].death_data.queue_duration_sample);
+  EXPECT_EQ(kWorkerThreadName, process_data.tasks[0].death_thread_name);
+
+  if (ThreadData::TrackingParentChildStatus()) {
+    ASSERT_EQ(1u, process_data.descendants.size());
+    EXPECT_EQ(kFile, process_data.descendants[0].parent.location.file_name);
+    EXPECT_EQ(kFunction,
+              process_data.descendants[0].parent.location.function_name);
+    EXPECT_EQ(kLineNumber,
+              process_data.descendants[0].parent.location.line_number);
+    EXPECT_EQ(kWorkerThreadName,
+              process_data.descendants[0].parent.thread_name);
+    EXPECT_EQ(kFile, process_data.descendants[0].child.location.file_name);
+    EXPECT_EQ(kFunction,
+              process_data.descendants[0].child.location.function_name);
+    EXPECT_EQ(kLineNumber,
+              process_data.descendants[0].child.location.line_number);
+    EXPECT_EQ(kWorkerThreadName, process_data.descendants[0].child.thread_name);
+  } else {
+    EXPECT_EQ(0u, process_data.descendants.size());
+  }
+}
+
+TEST_F(TrackedObjectsTest, DeathDataTest) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  scoped_ptr<DeathData> data(new DeathData());
+  ASSERT_NE(data, reinterpret_cast<DeathData*>(NULL));
+  EXPECT_EQ(data->run_duration_sum(), 0);
+  EXPECT_EQ(data->run_duration_sample(), 0);
+  EXPECT_EQ(data->queue_duration_sum(), 0);
+  EXPECT_EQ(data->queue_duration_sample(), 0);
+  EXPECT_EQ(data->count(), 0);
+
+  int32 run_ms = 42;
+  int32 queue_ms = 8;
+
+  const int kUnrandomInt = 0;  // Fake random int that ensure we sample data.
+  data->RecordDeath(queue_ms, run_ms, kUnrandomInt);
+  EXPECT_EQ(data->run_duration_sum(), run_ms);
+  EXPECT_EQ(data->run_duration_sample(), run_ms);
+  EXPECT_EQ(data->queue_duration_sum(), queue_ms);
+  EXPECT_EQ(data->queue_duration_sample(), queue_ms);
+  EXPECT_EQ(data->count(), 1);
+
+  data->RecordDeath(queue_ms, run_ms, kUnrandomInt);
+  EXPECT_EQ(data->run_duration_sum(), run_ms + run_ms);
+  EXPECT_EQ(data->run_duration_sample(), run_ms);
+  EXPECT_EQ(data->queue_duration_sum(), queue_ms + queue_ms);
+  EXPECT_EQ(data->queue_duration_sample(), queue_ms);
+  EXPECT_EQ(data->count(), 2);
+
+  DeathDataSnapshot snapshot(*data);
+  EXPECT_EQ(2, snapshot.count);
+  EXPECT_EQ(2 * run_ms, snapshot.run_duration_sum);
+  EXPECT_EQ(run_ms, snapshot.run_duration_max);
+  EXPECT_EQ(run_ms, snapshot.run_duration_sample);
+  EXPECT_EQ(2 * queue_ms, snapshot.queue_duration_sum);
+  EXPECT_EQ(queue_ms, snapshot.queue_duration_max);
+  EXPECT_EQ(queue_ms, snapshot.queue_duration_sample);
+}
+
+TEST_F(TrackedObjectsTest, DeactivatedBirthOnlyToSnapshotWorkerThread) {
+  // Start in the deactivated state.
+  if (!ThreadData::InitializeAndSetTrackingStatus(ThreadData::DEACTIVATED))
+    return;
+
+  const char kFunction[] = "DeactivatedBirthOnlyToSnapshotWorkerThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, std::string());
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  EXPECT_EQ(0u, process_data.tasks.size());
+  EXPECT_EQ(0u, process_data.descendants.size());
+  EXPECT_EQ(base::GetCurrentProcId(), process_data.process_id);
+}
+
+TEST_F(TrackedObjectsTest, DeactivatedBirthOnlyToSnapshotMainThread) {
+  // Start in the deactivated state.
+  if (!ThreadData::InitializeAndSetTrackingStatus(ThreadData::DEACTIVATED))
+    return;
+
+  const char kFunction[] = "DeactivatedBirthOnlyToSnapshotMainThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, kMainThreadName);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  EXPECT_EQ(0u, process_data.tasks.size());
+  EXPECT_EQ(0u, process_data.descendants.size());
+  EXPECT_EQ(base::GetCurrentProcId(), process_data.process_id);
+}
+
+TEST_F(TrackedObjectsTest, BirthOnlyToSnapshotWorkerThread) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  const char kFunction[] = "BirthOnlyToSnapshotWorkerThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, std::string());
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ExpectSimpleProcessData(process_data, kFunction, kWorkerThreadName,
+                          kStillAlive, 1, 0, 0);
+}
+
+TEST_F(TrackedObjectsTest, BirthOnlyToSnapshotMainThread) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  const char kFunction[] = "BirthOnlyToSnapshotMainThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, kMainThreadName);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ExpectSimpleProcessData(process_data, kFunction, kMainThreadName, kStillAlive,
+                          1, 0, 0);
+}
+
+TEST_F(TrackedObjectsTest, LifeCycleToSnapshotMainThread) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  const char kFunction[] = "LifeCycleToSnapshotMainThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, kMainThreadName);
+
+  const base::TimeTicks kTimePosted = base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(1);
+  const base::TimeTicks kDelayedStartTime = base::TimeTicks();
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task(location, kDelayedStartTime);
+  pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  const TrackedTime kStartOfRun = TrackedTime() +
+      Duration::FromMilliseconds(5);
+  const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
+      kStartOfRun, kEndOfRun);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ExpectSimpleProcessData(process_data, kFunction, kMainThreadName,
+                          kMainThreadName, 1, 2, 4);
+}
+
+// We will deactivate tracking after the birth, and before the death, and
+// demonstrate that the lifecycle is completely tallied. This ensures that
+// our tallied births are matched by tallied deaths (except for when the
+// task is still running, or is queued).
+TEST_F(TrackedObjectsTest, LifeCycleMidDeactivatedToSnapshotMainThread) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  const char kFunction[] = "LifeCycleMidDeactivatedToSnapshotMainThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, kMainThreadName);
+
+  const base::TimeTicks kTimePosted = base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(1);
+  const base::TimeTicks kDelayedStartTime = base::TimeTicks();
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task(location, kDelayedStartTime);
+  pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  // Turn off tracking now that we have births.
+  EXPECT_TRUE(ThreadData::InitializeAndSetTrackingStatus(
+      ThreadData::DEACTIVATED));
+
+  const TrackedTime kStartOfRun = TrackedTime() +
+      Duration::FromMilliseconds(5);
+  const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
+      kStartOfRun, kEndOfRun);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ExpectSimpleProcessData(process_data, kFunction, kMainThreadName,
+                          kMainThreadName, 1, 2, 4);
+}
+
+// We will deactivate tracking before starting a life cycle, and neither
+// the birth nor the death will be recorded.
+TEST_F(TrackedObjectsTest, LifeCyclePreDeactivatedToSnapshotMainThread) {
+  // Start in the deactivated state.
+  if (!ThreadData::InitializeAndSetTrackingStatus(ThreadData::DEACTIVATED))
+    return;
+
+  const char kFunction[] = "LifeCyclePreDeactivatedToSnapshotMainThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, kMainThreadName);
+
+  const base::TimeTicks kTimePosted = base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(1);
+  const base::TimeTicks kDelayedStartTime = base::TimeTicks();
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task(location, kDelayedStartTime);
+  pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  const TrackedTime kStartOfRun = TrackedTime() +
+      Duration::FromMilliseconds(5);
+  const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
+      kStartOfRun, kEndOfRun);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  EXPECT_EQ(0u, process_data.tasks.size());
+  EXPECT_EQ(0u, process_data.descendants.size());
+  EXPECT_EQ(base::GetCurrentProcId(), process_data.process_id);
+}
+
+TEST_F(TrackedObjectsTest, LifeCycleToSnapshotWorkerThread) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  const char kFunction[] = "LifeCycleToSnapshotWorkerThread";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  // Do not delete |birth|.  We don't own it.
+  Births* birth = ThreadData::TallyABirthIfActive(location);
+  EXPECT_NE(reinterpret_cast<Births*>(NULL), birth);
+
+  const TrackedTime kTimePosted = TrackedTime() + Duration::FromMilliseconds(1);
+  const TrackedTime kStartOfRun = TrackedTime() +
+      Duration::FromMilliseconds(5);
+  const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
+  ThreadData::TallyRunOnWorkerThreadIfTracking(birth, kTimePosted,
+      kStartOfRun, kEndOfRun);
+
+  // Call for the ToSnapshot, but tell it to not reset the maxes after scanning.
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ExpectSimpleProcessData(process_data, kFunction, kWorkerThreadName,
+                          kWorkerThreadName, 1, 2, 4);
+
+  // Call for the ToSnapshot, but tell it to reset the maxes after scanning.
+  // We'll still get the same values, but the data will be reset (which we'll
+  // see in a moment).
+  ProcessDataSnapshot process_data_pre_reset;
+  ThreadData::Snapshot(true, &process_data_pre_reset);
+  ExpectSimpleProcessData(process_data, kFunction, kWorkerThreadName,
+                          kWorkerThreadName, 1, 2, 4);
+
+  // Call for the ToSnapshot, and now we'll see the result of the last
+  // translation, as the max will have been pushed back to zero.
+  ProcessDataSnapshot process_data_post_reset;
+  ThreadData::Snapshot(true, &process_data_post_reset);
+  ASSERT_EQ(1u, process_data_post_reset.tasks.size());
+  EXPECT_EQ(kFile, process_data_post_reset.tasks[0].birth.location.file_name);
+  EXPECT_EQ(kFunction,
+            process_data_post_reset.tasks[0].birth.location.function_name);
+  EXPECT_EQ(kLineNumber,
+            process_data_post_reset.tasks[0].birth.location.line_number);
+  EXPECT_EQ(kWorkerThreadName,
+            process_data_post_reset.tasks[0].birth.thread_name);
+  EXPECT_EQ(1, process_data_post_reset.tasks[0].death_data.count);
+  EXPECT_EQ(2, process_data_post_reset.tasks[0].death_data.run_duration_sum);
+  EXPECT_EQ(0, process_data_post_reset.tasks[0].death_data.run_duration_max);
+  EXPECT_EQ(2, process_data_post_reset.tasks[0].death_data.run_duration_sample);
+  EXPECT_EQ(4, process_data_post_reset.tasks[0].death_data.queue_duration_sum);
+  EXPECT_EQ(0, process_data_post_reset.tasks[0].death_data.queue_duration_max);
+  EXPECT_EQ(4,
+            process_data_post_reset.tasks[0].death_data.queue_duration_sample);
+  EXPECT_EQ(kWorkerThreadName,
+            process_data_post_reset.tasks[0].death_thread_name);
+  EXPECT_EQ(0u, process_data_post_reset.descendants.size());
+  EXPECT_EQ(base::GetCurrentProcId(), process_data_post_reset.process_id);
+}
+
+TEST_F(TrackedObjectsTest, TwoLives) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  const char kFunction[] = "TwoLives";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+  TallyABirth(location, kMainThreadName);
+
+  const base::TimeTicks kTimePosted = base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(1);
+  const base::TimeTicks kDelayedStartTime = base::TimeTicks();
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task(location, kDelayedStartTime);
+  pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  const TrackedTime kStartOfRun = TrackedTime() +
+      Duration::FromMilliseconds(5);
+  const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
+      kStartOfRun, kEndOfRun);
+
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task2(location, kDelayedStartTime);
+  pending_task2.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task2,
+      kStartOfRun, kEndOfRun);
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ExpectSimpleProcessData(process_data, kFunction, kMainThreadName,
+                          kMainThreadName, 2, 2, 4);
+}
+
+TEST_F(TrackedObjectsTest, DifferentLives) {
+  if (!ThreadData::InitializeAndSetTrackingStatus(
+          ThreadData::PROFILING_CHILDREN_ACTIVE))
+    return;
+
+  // Use a well named thread.
+  ThreadData::InitializeThreadContext(kMainThreadName);
+  const char kFunction[] = "DifferentLives";
+  Location location(kFunction, kFile, kLineNumber, NULL);
+
+  const base::TimeTicks kTimePosted = base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(1);
+  const base::TimeTicks kDelayedStartTime = base::TimeTicks();
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task(location, kDelayedStartTime);
+  pending_task.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  const TrackedTime kStartOfRun = TrackedTime() +
+      Duration::FromMilliseconds(5);
+  const TrackedTime kEndOfRun = TrackedTime() + Duration::FromMilliseconds(7);
+  ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
+      kStartOfRun, kEndOfRun);
+
+  const int kSecondFakeLineNumber = 999;
+  Location second_location(kFunction, kFile, kSecondFakeLineNumber, NULL);
+
+  // TrackingInfo will call TallyABirth() during construction.
+  base::TrackingInfo pending_task2(second_location, kDelayedStartTime);
+  pending_task2.time_posted = kTimePosted;  // Overwrite implied Now().
+
+  ProcessDataSnapshot process_data;
+  ThreadData::Snapshot(false, &process_data);
+  ASSERT_EQ(2u, process_data.tasks.size());
+  EXPECT_EQ(kFile, process_data.tasks[0].birth.location.file_name);
+  EXPECT_EQ(kFunction, process_data.tasks[0].birth.location.function_name);
+  EXPECT_EQ(kLineNumber, process_data.tasks[0].birth.location.line_number);
+  EXPECT_EQ(kMainThreadName, process_data.tasks[0].birth.thread_name);
+  EXPECT_EQ(1, process_data.tasks[0].death_data.count);
+  EXPECT_EQ(2, process_data.tasks[0].death_data.run_duration_sum);
+  EXPECT_EQ(2, process_data.tasks[0].death_data.run_duration_max);
+  EXPECT_EQ(2, process_data.tasks[0].death_data.run_duration_sample);
+  EXPECT_EQ(4, process_data.tasks[0].death_data.queue_duration_sum);
+  EXPECT_EQ(4, process_data.tasks[0].death_data.queue_duration_max);
+  EXPECT_EQ(4, process_data.tasks[0].death_data.queue_duration_sample);
+  EXPECT_EQ(kMainThreadName, process_data.tasks[0].death_thread_name);
+  EXPECT_EQ(kFile, process_data.tasks[1].birth.location.file_name);
+  EXPECT_EQ(kFunction, process_data.tasks[1].birth.location.function_name);
+  EXPECT_EQ(kSecondFakeLineNumber,
+            process_data.tasks[1].birth.location.line_number);
+  EXPECT_EQ(kMainThreadName, process_data.tasks[1].birth.thread_name);
+  EXPECT_EQ(1, process_data.tasks[1].death_data.count);
+  EXPECT_EQ(0, process_data.tasks[1].death_data.run_duration_sum);
+  EXPECT_EQ(0, process_data.tasks[1].death_data.run_duration_max);
+  EXPECT_EQ(0, process_data.tasks[1].death_data.run_duration_sample);
+  EXPECT_EQ(0, process_data.tasks[1].death_data.queue_duration_sum);
+  EXPECT_EQ(0, process_data.tasks[1].death_data.queue_duration_max);
+  EXPECT_EQ(0, process_data.tasks[1].death_data.queue_duration_sample);
+  EXPECT_EQ(kStillAlive, process_data.tasks[1].death_thread_name);
+  EXPECT_EQ(0u, process_data.descendants.size());
+  EXPECT_EQ(base::GetCurrentProcId(), process_data.process_id);
+}
+
+}  // namespace tracked_objects