blob: 1767e85d76912c7e352c0d276437fec69da5d1dd [file] [log] [blame]
/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "nb/analytics/memory_tracker_impl.h"
#include "nb/memory_scope.h"
#include "nb/scoped_ptr.h"
#include "nb/test_thread.h"
#include "starboard/configuration.h"
#include "starboard/system.h"
#include "testing/gtest/include/gtest/gtest.h"
#define STRESS_TEST_DURATION_SECONDS 1
#define NUM_STRESS_TEST_THREADS 3
// The following is necessary to prevent operator new from being optimized
// out using some compilers. This is required because we rely on operator new
// to report memory usage. Overly aggressive optimizing compilers will
// eliminate the call to operator new, even though it causes a lost of side
// effects. This will therefore break the memory reporting mechanism. This is
// a bug in the compiler.
//
// The solution here is to use macro-replacement to substitute calls to global
// new to instead be delegated to our custom new, which prevents elimination
// by using a temporay volatile.
namespace {
struct CustomObject {
static CustomObject Make() {
CustomObject o;
return o;
}
};
}
void* operator new(std::size_t size, CustomObject ignored) {
SB_UNREFERENCED_PARAMETER(ignored);
// Volatile prevents optimization and elimination of operator new by the
// optimizing compiler.
volatile void* ptr = ::operator new(size);
return const_cast<void*>(ptr);
}
#define NEW_NO_OPTIMIZER_ELIMINATION new (CustomObject::Make())
#define new NEW_NO_OPTIMIZER_ELIMINATION
namespace nb {
namespace analytics {
namespace {
class NoReportAllocator {
public:
NoReportAllocator() {}
NoReportAllocator(const NoReportAllocator&) {}
static void* Allocate(size_t n) {
return SbMemoryAllocateNoReport(n);
}
// Second argument can be used for accounting, but is otherwise optional.
static void Deallocate(void* ptr, size_t /* not used*/) {
SbMemoryDeallocateNoReport(ptr);
}
};
// Some platforms will allocate memory for empty vectors. Therefore
// use MyVector to prevent empty vectors from reporting memory.
template <typename T>
using MyVector = std::vector<T, StdAllocator<T, NoReportAllocator>>;
MemoryTrackerImpl* s_memory_tracker_ = NULL;
struct NoMemTracking {
bool prev_val;
NoMemTracking() : prev_val(false) {
if (s_memory_tracker_) {
prev_val = s_memory_tracker_->IsMemoryTrackingEnabled();
s_memory_tracker_->SetMemoryTrackingEnabled(false);
}
}
~NoMemTracking() {
if (s_memory_tracker_) {
s_memory_tracker_->SetMemoryTrackingEnabled(prev_val);
}
}
};
// EXPECT_XXX and ASSERT_XXX allocate memory, a big no-no when
// for unit testing allocations. These overrides disable memory
// tracking for the duration of the EXPECT and ASSERT operations.
#define EXPECT_EQ_NO_TRACKING(A, B) \
{ \
NoMemTracking no_memory_tracking_in_this_scope; \
EXPECT_EQ(A, B); \
}
#define EXPECT_TRUE_NO_TRACKING(A) \
{ \
NoMemTracking no_memory_tracking_in_this_scope; \
EXPECT_TRUE(A); \
}
#define EXPECT_FALSE_NO_TRACKING(A) \
{ \
NoMemTracking no_memory_tracking_in_this_scope; \
EXPECT_FALSE(A); \
}
#define ASSERT_EQ_NO_TRACKING(A, B) \
{ \
NoMemTracking no_memory_tracking_in_this_scope; \
ASSERT_EQ(A, B); \
}
#define ASSERT_TRUE_NO_TRACKING(A) \
{ \
NoMemTracking no_memory_tracking_in_this_scope; \
ASSERT_TRUE(A); \
}
// !! converts int -> bool.
bool FlipCoin() {
return !!(SbSystemGetRandomUInt64() & 0x1);
}
///////////////////////////////////////////////////////////////////////////////
// Stress testing the Allocation Tracker.
class MemoryScopeThread : public nb::TestThread {
public:
typedef nb::TestThread Super;
explicit MemoryScopeThread(MemoryTrackerImpl* memory_tracker)
: memory_tracker_(memory_tracker) {
static int s_counter = 0;
std::stringstream ss;
ss << "MemoryScopeThread_" << s_counter++;
unique_name_ = ss.str();
}
virtual ~MemoryScopeThread() {}
// Overridden so that the thread can exit gracefully.
virtual void Join() {
finished_ = true;
Super::Join();
}
virtual void Run() {
while (!finished_) {
TRACK_MEMORY_SCOPE_DYNAMIC(unique_name_.c_str());
AllocationGroup* group = memory_tracker_->PeekAllocationGroup();
const int cmp_result = group->name().compare(unique_name_);
if (cmp_result != 0) {
GTEST_FAIL() << "unique name mismatch";
return;
}
}
}
private:
MemoryTrackerImpl* memory_tracker_;
bool finished_;
std::string unique_name_;
int do_delete_counter_;
int do_malloc_counter_;
};
///////////////////////////////////////////////////////////////////////////////
// Stress testing the Allocation Tracker.
class AllocationStressThread : public nb::TestThread {
public:
explicit AllocationStressThread(MemoryTrackerImpl* memory_tracker);
virtual ~AllocationStressThread();
// Overridden so that the thread can exit gracefully.
virtual void Join();
virtual void Run();
private:
typedef std::map<const void*, AllocationRecord> AllocMap;
void CheckPointers();
bool RemoveRandomAllocation(std::pair<const void*, AllocationRecord>* output);
bool DoDelete();
void DoMalloc();
MemoryTrackerImpl* memory_tracker_;
bool finished_;
std::map<const void*, AllocationRecord> allocated_pts_;
std::string unique_name_;
int do_delete_counter_;
int do_malloc_counter_;
};
class AddAllocationStressThread : public nb::TestThread {
public:
typedef std::map<const void*, AllocationRecord> AllocMap;
AddAllocationStressThread(MemoryTracker* memory_tracker,
int num_elements_add,
AllocMap* destination_map,
starboard::Mutex* destination_map_mutex)
: memory_tracker_(memory_tracker),
num_elements_to_add_(num_elements_add),
destination_map_(destination_map),
destination_map_mutex_(destination_map_mutex) {}
virtual void Run() {
for (int i = 0; i < num_elements_to_add_; ++i) {
const int alloc_size = std::rand() % 100 + 8;
void* ptr = SbMemoryAllocate(alloc_size);
AllocationRecord record;
if (memory_tracker_->GetMemoryTracking(ptr, &record)) {
NoMemTracking no_mem_tracking; // simplifies test.
starboard::ScopedLock lock(*destination_map_mutex_);
destination_map_->insert(std::make_pair(ptr, record));
} else {
ADD_FAILURE_AT(__FILE__, __LINE__) << "Could not add pointer.";
}
if (FlipCoin()) {
SbThreadYield(); // Give other threads a chance to run.
}
}
}
private:
MemoryTracker* memory_tracker_;
AllocMap* destination_map_;
starboard::Mutex* destination_map_mutex_;
int num_elements_to_add_;
};
///////////////////////////////////////////////////////////////////////////////
// Framework which initializes the MemoryTracker once and installs it
// for the first test and the removes the MemoryTracker after the
// the last test finishes.
class MemoryTrackerImplTest : public ::testing::Test {
public:
typedef MemoryTrackerImpl::AllocationMapType AllocationMapType;
MemoryTrackerImplTest() {}
MemoryTrackerImpl* memory_tracker() { return s_memory_tracker_; }
bool GetAllocRecord(void* alloc_memory, AllocationRecord* output) {
return memory_tracker()->GetMemoryTracking(alloc_memory, output);
}
AllocationMapType* pointer_map() { return memory_tracker()->pointer_map(); }
size_t NumberOfAllocations() {
AllocationMapType* map = pointer_map();
return map->Size();
}
int64_t TotalAllocationBytes() {
return memory_tracker()->GetTotalAllocationBytes();
}
bool MemoryTrackerEnabled() const { return s_memory_tracker_enabled_; }
protected:
static void SetUpTestCase() {
if (!s_memory_tracker_) {
s_memory_tracker_ = new MemoryTrackerImpl;
}
// There are obligatory background threads for nb_test suite. This filter
// makes sure that they don't intercept this test.
s_memory_tracker_->SetThreadFilter(SbThreadGetId());
s_memory_tracker_enabled_ =
s_memory_tracker_->InstallGlobalTrackingHooks();
}
static void TearDownTestCase() {
s_memory_tracker_->RemoveGlobalTrackingHooks();
// Give time for threads to sync. We don't use locks on the reporter
// for performance reasons.
SbThreadSleep(250 * kSbTimeMillisecond);
}
virtual void SetUp() {
memory_tracker()->Clear();
}
virtual void TearDown() {
memory_tracker()->Clear();
}
static bool s_memory_tracker_enabled_;
};
bool MemoryTrackerImplTest::s_memory_tracker_enabled_ = false;
///////////////////////////////////////////////////////////////////////////////
// MemoryTrackerImplTest
TEST_F(MemoryTrackerImplTest, NoMemTracking) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
ASSERT_EQ_NO_TRACKING(0, NumberOfAllocations());
scoped_ptr<int> dummy(new int());
EXPECT_EQ_NO_TRACKING(1, NumberOfAllocations());
{
// Now that memory allocation is disabled, no more allocations should
// be recorded.
NoMemTracking no_memory_tracking_in_this_scope;
int* dummy2 = new int();
EXPECT_EQ_NO_TRACKING(1, NumberOfAllocations());
delete dummy2;
EXPECT_EQ_NO_TRACKING(1, NumberOfAllocations());
}
scoped_ptr<int> dummy2(new int());
EXPECT_EQ_NO_TRACKING(2, NumberOfAllocations());
dummy.reset(NULL);
EXPECT_EQ_NO_TRACKING(1, NumberOfAllocations());
dummy2.reset(NULL);
EXPECT_EQ_NO_TRACKING(0, NumberOfAllocations());
}
TEST_F(MemoryTrackerImplTest, RemovePointerOnNoMemoryTracking) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
int* int_ptr = new int();
{
NoMemTracking no_memory_tracking_in_this_scope;
delete int_ptr;
}
EXPECT_FALSE_NO_TRACKING(pointer_map()->Get(int_ptr, NULL));
}
TEST_F(MemoryTrackerImplTest, NewDeleteOverridenTest) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
EXPECT_EQ_NO_TRACKING(0, NumberOfAllocations());
int* int_a = new int(0);
EXPECT_EQ_NO_TRACKING(1, NumberOfAllocations());
delete int_a;
EXPECT_EQ_NO_TRACKING(0, NumberOfAllocations());
}
TEST_F(MemoryTrackerImplTest, TotalAllocationBytes) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
int32_t* int_a = new int32_t(0);
EXPECT_EQ_NO_TRACKING(1, NumberOfAllocations());
EXPECT_EQ_NO_TRACKING(4, TotalAllocationBytes());
delete int_a;
EXPECT_EQ_NO_TRACKING(0, NumberOfAllocations());
}
// Tests the expectation that a lot of allocations can be executed and that
// internal data structures won't overflow.
TEST_F(MemoryTrackerImplTest, NoStackOverflow) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
static const int kNumAllocations = 1000;
MyVector<int*> allocations;
// Also it turns out that this test is great for catching
// background threads pushing allocations through the allocator.
// This is supposed to be filtered, but if it's not then this test will
// fail.
// SbThreadYield() is used to give other threads a chance to enter into our
// allocator and catch a test failure.
SbThreadSleep(1);
size_t previously_existing_allocs = NumberOfAllocations();
ASSERT_EQ_NO_TRACKING(0, previously_existing_allocs);
for (int i = 0; i < kNumAllocations; ++i) {
SbThreadYield();
EXPECT_EQ_NO_TRACKING(i, NumberOfAllocations());
int* val = new int(0);
NoMemTracking no_tracking_in_scope;
allocations.push_back(val);
}
EXPECT_EQ_NO_TRACKING(kNumAllocations, NumberOfAllocations());
for (int i = 0; i < kNumAllocations; ++i) {
SbThreadYield();
EXPECT_EQ_NO_TRACKING(kNumAllocations - i, NumberOfAllocations());
delete allocations[i];
}
EXPECT_EQ_NO_TRACKING(0, NumberOfAllocations());
}
// Tests the expectation that the macros will push/pop the memory scope.
TEST_F(MemoryTrackerImplTest, MacrosPushPop) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
scoped_ptr<int> dummy;
{
TRACK_MEMORY_SCOPE("TestAllocations");
dummy.reset(new int());
}
scoped_ptr<int> dummy2(new int());
AllocationRecord alloc_rec;
pointer_map()->Get(dummy.get(), &alloc_rec);
ASSERT_TRUE_NO_TRACKING(alloc_rec.allocation_group);
EXPECT_EQ_NO_TRACKING(std::string("TestAllocations"),
alloc_rec.allocation_group->name());
pointer_map()->Get(dummy2.get(), &alloc_rec);
ASSERT_TRUE_NO_TRACKING(alloc_rec.allocation_group);
EXPECT_EQ_NO_TRACKING(std::string("Unaccounted"),
alloc_rec.allocation_group->name());
}
// Tests the expectation that if the cached flag on the NbMemoryScopeInfo is
// set to false that the caching of the handle is not performed.
TEST_F(MemoryTrackerImplTest, RespectsNonCachedHandle) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
const bool kCaching = false;
NbMemoryScopeInfo memory_scope = {
NULL, "MyName", __FILE__,
__LINE__, __FUNCTION__, false}; // false to disallow caching.
// Pushing the memory scope should trigger the caching operation to be
// attempted. However, because caching was explicitly disabled this handle
// should retain the value of 0.
NbPushMemoryScope(&memory_scope);
EXPECT_TRUE_NO_TRACKING(memory_scope.cached_handle_ == NULL);
// ... and still assert that the group was created with the expected name.
AllocationGroup* group = memory_tracker()->GetAllocationGroup("MyName");
// Equality check.
EXPECT_EQ_NO_TRACKING(0, group->name().compare("MyName"));
NbPopMemoryScope();
}
// Tests the expectation that if the cached flag on the NbMemoryScopeInfo is
// set to true that the caching will be applied for the cached_handle of the
// memory scope.
TEST_F(MemoryTrackerImplTest, PushAllocGroupCachedHandle) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
NbMemoryScopeInfo memory_scope = {
NULL, // Cached handle.
"MyName", // Memory scope name.
__FILE__, __LINE__, __FUNCTION__,
true // Allows caching.
};
NbPushMemoryScope(&memory_scope);
EXPECT_TRUE_NO_TRACKING(memory_scope.cached_handle_ != NULL);
AllocationGroup* group = memory_tracker()->GetAllocationGroup("MyName");
EXPECT_EQ_NO_TRACKING(memory_scope.cached_handle_,
static_cast<void*>(group));
NbPopMemoryScope();
}
// Tests the expectation that the macro TRACK_MEMORY_SCOPE will capture the
// allocation in the MemoryTrackerImpl.
TEST_F(MemoryTrackerImplTest, MacrosGroupAccounting) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
MemoryTrackerImpl* track_alloc = memory_tracker(); // Debugging.
track_alloc->Clear();
memory_tracker()->Clear();
const AllocationGroup* group_a =
memory_tracker()->GetAllocationGroup("MemoryTrackerTest-ScopeA");
const AllocationGroup* group_b =
memory_tracker()->GetAllocationGroup("MemoryTrackerTest-ScopeB");
ASSERT_TRUE_NO_TRACKING(group_a);
ASSERT_TRUE_NO_TRACKING(group_b);
int32_t num_allocations = -1;
int64_t allocation_bytes = -1;
// Expect that both groups have no allocations in them.
group_a->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(0, num_allocations);
EXPECT_EQ_NO_TRACKING(0, allocation_bytes);
group_b->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(0, num_allocations);
EXPECT_EQ_NO_TRACKING(0, allocation_bytes);
scoped_ptr<int> alloc_a, alloc_b, alloc_b2;
{
TRACK_MEMORY_SCOPE("MemoryTrackerTest-ScopeA");
alloc_a.reset(new int());
{
TRACK_MEMORY_SCOPE("MemoryTrackerTest-ScopeB");
alloc_b.reset(new int());
alloc_b2.reset(new int());
group_a->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(1, num_allocations);
EXPECT_EQ_NO_TRACKING(4, allocation_bytes);
alloc_a.reset(NULL);
group_a->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(0, num_allocations);
EXPECT_EQ_NO_TRACKING(0, allocation_bytes);
allocation_bytes = num_allocations = -1;
group_b->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(2, num_allocations);
EXPECT_EQ_NO_TRACKING(8, allocation_bytes);
alloc_b2.reset(NULL);
group_b->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(1, num_allocations);
EXPECT_EQ_NO_TRACKING(4, allocation_bytes);
alloc_b.reset(NULL);
group_b->GetAggregateStats(&num_allocations, &allocation_bytes);
EXPECT_EQ_NO_TRACKING(0, num_allocations);
EXPECT_EQ_NO_TRACKING(0, allocation_bytes);
}
}
}
// Tests the expectation that the MemoryTrackerDebugCallback works as expected
// to notify of incoming allocations.
TEST_F(MemoryTrackerImplTest, MemoryTrackerDebugCallback) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
// Impl of the callback. Copies the allocation information so that we can
// ensure it produces expected values.
class MemoryTrackerDebugCallbackTest : public MemoryTrackerDebugCallback {
public:
MemoryTrackerDebugCallbackTest() { Reset(); }
void OnMemoryAllocation(const void* memory_block,
const AllocationRecord& record,
const CallStack& callstack) override {
last_memory_block_allocated_ = memory_block;
last_allocation_record_allocated_ = record;
}
void OnMemoryDeallocation(const void* memory_block,
const AllocationRecord& record,
const CallStack& callstack) override {
last_memory_block_deallocated_ = memory_block;
last_allocation_record_deallocated_ = record;
}
void Reset() {
last_memory_block_allocated_ = NULL;
last_memory_block_deallocated_ = NULL;
last_allocation_record_allocated_ = AllocationRecord::Empty();
last_allocation_record_deallocated_ = AllocationRecord::Empty();
}
const void* last_memory_block_allocated_;
const void* last_memory_block_deallocated_;
AllocationRecord last_allocation_record_allocated_;
AllocationRecord last_allocation_record_deallocated_;
};
// Needs to be static due to concurrent and lockless nature of object.
static MemoryTrackerDebugCallbackTest s_debug_callback;
s_debug_callback.Reset();
memory_tracker()->SetMemoryTrackerDebugCallback(&s_debug_callback);
void* memory_block = SbMemoryAllocate(8);
EXPECT_EQ_NO_TRACKING(
memory_block,
s_debug_callback.last_memory_block_allocated_);
EXPECT_EQ_NO_TRACKING(
8,
s_debug_callback.last_allocation_record_allocated_.size);
// ... and no memory should have been deallocated.
EXPECT_TRUE_NO_TRACKING(s_debug_callback.last_memory_block_deallocated_
== NULL);
// After this call we check that the callback for deallocation was used.
SbMemoryDeallocate(memory_block);
EXPECT_EQ_NO_TRACKING(
memory_block,
s_debug_callback.last_memory_block_deallocated_);
EXPECT_EQ_NO_TRACKING(
s_debug_callback.last_allocation_record_deallocated_.size,
8);
}
// Tests the expectation that the visitor can access the allocations.
TEST_F(MemoryTrackerImplTest, VisitorAccess) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
class SimpleVisitor : public AllocationVisitor {
public:
SimpleVisitor() : num_memory_allocs_(0) {}
virtual bool Visit(const void* memory,
const AllocationRecord& alloc_record) {
num_memory_allocs_++;
return true; // Keep traversing.
}
size_t num_memory_allocs_;
};
SimpleVisitor visitor;
scoped_ptr<int> int_ptr(new int);
// Should see the int_ptr allocation.
memory_tracker()->Accept(&visitor);
EXPECT_EQ_NO_TRACKING(1, visitor.num_memory_allocs_);
visitor.num_memory_allocs_ = 0;
int_ptr.reset(NULL);
// Now no allocations should be available.
memory_tracker()->Accept(&visitor);
EXPECT_EQ_NO_TRACKING(0, visitor.num_memory_allocs_);
}
// A stress test that rapidly adds allocations, but saves all deletions
// for the main thread. This test will catch concurrency errors related
// to reporting new allocations.
TEST_F(MemoryTrackerImplTest, MultiThreadedStressAddTest) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
// Disable allocation filtering.
memory_tracker()->SetThreadFilter(kSbThreadInvalidId);
MyVector<nb::TestThread*> threads;
const int kNumObjectsToAdd = 10000 / NUM_STRESS_TEST_THREADS;
AddAllocationStressThread::AllocMap map;
starboard::Mutex map_mutex;
for (int i = 0; i < NUM_STRESS_TEST_THREADS; ++i) {
nb::TestThread* thread = new AddAllocationStressThread(
memory_tracker(), kNumObjectsToAdd, &map, &map_mutex);
threads.push_back(thread);
}
for (int i = 0; i < NUM_STRESS_TEST_THREADS; ++i) {
threads[i]->Start();
}
for (int i = 0; i < NUM_STRESS_TEST_THREADS; ++i) {
threads[i]->Join();
}
for (int i = 0; i < NUM_STRESS_TEST_THREADS; ++i) {
delete threads[i];
}
while (!map.empty()) {
const void* ptr = map.begin()->first;
map.erase(map.begin());
if (!memory_tracker()->GetMemoryTracking(ptr, NULL)) {
ADD_FAILURE_AT(__FILE__, __LINE__) << "No tracking?!";
}
SbMemoryDeallocate(const_cast<void*>(ptr));
if (memory_tracker()->GetMemoryTracking(ptr, NULL)) {
ADD_FAILURE_AT(__FILE__, __LINE__) << "Tracking?!";
}
}
}
// Tests the expectation that memory scopes are multi-threaded safe.
TEST_F(MemoryTrackerImplTest, MultiThreadedMemoryScope) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
memory_tracker()->SetThreadFilter(kSbThreadInvalidId);
TRACK_MEMORY_SCOPE("MultiThreadedStressUseTest");
MyVector<MemoryScopeThread*> threads;
for (int i = 0; i < NUM_STRESS_TEST_THREADS; ++i) {
threads.push_back(new MemoryScopeThread(memory_tracker()));
}
for (int i = 0; i < threads.size(); ++i) {
threads[i]->Start();
}
SbThreadSleep(STRESS_TEST_DURATION_SECONDS * 1000 * 1000);
for (int i = 0; i < threads.size(); ++i) {
threads[i]->Join();
}
for (int i = 0; i < threads.size(); ++i) {
delete threads[i];
}
threads.clear();
}
// Tests the expectation that new/delete can be done by different threads.
TEST_F(MemoryTrackerImplTest, MultiThreadedStressUseTest) {
// Memory tracker is not enabled for this build.
if (!MemoryTrackerEnabled()) {
return;
}
// Disable allocation filtering.
memory_tracker()->SetThreadFilter(kSbThreadInvalidId);
TRACK_MEMORY_SCOPE("MultiThreadedStressUseTest");
MyVector<AllocationStressThread*> threads;
for (int i = 0; i < NUM_STRESS_TEST_THREADS; ++i) {
threads.push_back(new AllocationStressThread(memory_tracker()));
}
for (int i = 0; i < threads.size(); ++i) {
threads[i]->Start();
}
SbThreadSleep(STRESS_TEST_DURATION_SECONDS * 1000 * 1000);
for (int i = 0; i < threads.size(); ++i) {
threads[i]->Join();
}
for (int i = 0; i < threads.size(); ++i) {
delete threads[i];
}
threads.clear();
}
//////////////////////////// Implementation ///////////////////////////////////
/// Impl of AllocationStressThread
AllocationStressThread::AllocationStressThread(MemoryTrackerImpl* tracker)
: memory_tracker_(tracker), finished_(false) {
static int counter = 0;
std::stringstream ss;
ss << "AllocStressThread-" << counter++;
unique_name_ = ss.str();
}
AllocationStressThread::~AllocationStressThread() {
if (!allocated_pts_.empty()) {
ADD_FAILURE_AT(__FILE__, __LINE__) << "allocated pointers still exist";
}
}
void AllocationStressThread::Join() {
finished_ = true;
nb::TestThread::Join();
}
void AllocationStressThread::CheckPointers() {
typedef AllocMap::iterator Iter;
for (Iter it = allocated_pts_.begin(); it != allocated_pts_.end(); ++it) {
const void* ptr = it->first;
const bool found = memory_tracker_->GetMemoryTracking(ptr, NULL);
if (!found) {
NoMemTracking no_tracking_in_scope;
ADD_FAILURE_AT(__FILE__, __LINE__) << "Not found";
}
}
}
void AllocationStressThread::Run() {
while (!finished_) {
const bool do_delete = FlipCoin();
if (FlipCoin()) {
DoDelete();
} else {
DoMalloc();
}
CheckPointers();
// Randomly give other threads the opportunity run.
if (FlipCoin()) {
SbThreadYield();
}
}
// Clear out all memory.
while (DoDelete()) {
;
}
}
bool AllocationStressThread::RemoveRandomAllocation(
std::pair<const void*, AllocationRecord>* output) {
if (allocated_pts_.empty()) {
return false;
}
// Select a random pointer to delete.
int idx = std::rand() % allocated_pts_.size();
AllocMap::iterator iter = allocated_pts_.begin();
while (idx > 0) {
idx--;
iter++;
}
output->first = iter->first;
output->second = iter->second;
allocated_pts_.erase(iter);
return true;
}
bool AllocationStressThread::DoDelete() {
NoMemTracking no_memory_tracking_in_this_scope;
++do_delete_counter_;
std::pair<const void*, AllocationRecord> alloc;
if (!RemoveRandomAllocation(&alloc)) {
return false;
}
const void* ptr = alloc.first;
const AllocationRecord expected_alloc_record = alloc.second;
TRACK_MEMORY_SCOPE_DYNAMIC(unique_name_.c_str());
AllocationGroup* current_group = memory_tracker_->PeekAllocationGroup();
// Expect that the name of the current allocation group name is the same as
// what we expect.
if (current_group->name() != unique_name_) {
NoMemTracking no_memory_tracking_in_this_scope;
ADD_FAILURE_AT(__FILE__, __LINE__) << " " << current_group->name()
<< " != " << unique_name_;
}
MemoryTrackerImpl::AllocationMapType* internal_alloc_map =
memory_tracker_->pointer_map();
AllocationRecord existing_alloc_record;
const bool found_existing_record =
memory_tracker_->GetMemoryTracking(ptr, &existing_alloc_record);
if (!found_existing_record) {
ADD_FAILURE_AT(__FILE__, __LINE__)
<< "expected to find existing record, but did not";
} else if (current_group != existing_alloc_record.allocation_group) {
ADD_FAILURE_AT(__FILE__, __LINE__)
<< "group allocation mismatch: " << current_group->name()
<< " != " << existing_alloc_record.allocation_group->name() << "\n";
}
SbMemoryDeallocate(const_cast<void*>(ptr));
return true;
}
void AllocationStressThread::DoMalloc() {
++do_malloc_counter_;
if (allocated_pts_.size() > 10000) {
return;
}
TRACK_MEMORY_SCOPE_DYNAMIC(unique_name_.c_str());
AllocationGroup* current_group = memory_tracker_->PeekAllocationGroup();
// Sanity check, make sure that the current_group name is the same as
// our unique name.
if (current_group->name() != unique_name_) {
NoMemTracking no_tracking_in_scope;
ADD_FAILURE_AT(__FILE__, __LINE__) << " " << current_group->name()
<< " != " << unique_name_;
}
if (!memory_tracker_->IsMemoryTrackingEnabled()) {
NoMemTracking no_tracking_in_scope;
ADD_FAILURE_AT(__FILE__, __LINE__)
<< " memory tracking state was disabled.";
}
const int alloc_size = std::rand() % 100 + 8;
void* memory = SbMemoryAllocate(alloc_size);
AllocationRecord record;
bool found = memory_tracker_->GetMemoryTracking(memory, &record);
if (!found) {
NoMemTracking no_tracking_in_scope;
ADD_FAILURE_AT(__FILE__, __LINE__)
<< "Violated expectation, malloc counter: " << do_malloc_counter_;
}
AllocMap::iterator found_it = allocated_pts_.find(memory);
if (found_it != allocated_pts_.end()) {
NoMemTracking no_tracking_in_scope;
ADD_FAILURE_AT(__FILE__, __LINE__)
<< "This pointer should not be in the map.";
}
NoMemTracking no_tracking_in_scope;
allocated_pts_[memory] = AllocationRecord(alloc_size, current_group);
}
} // namespace
} // namespace analytics
} // namespace nb