v8/test/cctest/heap/test-array-buffer-tracker.cc
mlippautz 839f3fd406 Track based on JSArrayBuffer addresses on pages instead of the attached
backing store.

Details of tracking:
- Scavenge: New space pages are processes in bulk on the main thread
- MC: Unswept pages are processed in bulk in parallel. All other pages
  are processed by the sweeper concurrently.

BUG=chromium:611688
LOG=N
TEST=cctest/test-array-buffer-tracker/*
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel

Review-Url: https://codereview.chromium.org/2036643002
Cr-Commit-Position: refs/heads/master@{#36798}
2016-06-07 17:29:35 +00:00

319 lines
11 KiB
C++

// Copyright 2016 the V8 project 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 "src/heap/array-buffer-tracker.h"
#include "test/cctest/cctest.h"
#include "test/cctest/heap/heap-utils.h"
namespace {
typedef i::LocalArrayBufferTracker LocalTracker;
bool IsTracked(i::JSArrayBuffer* buf) {
return i::ArrayBufferTracker::IsTracked(buf);
}
} // namespace
namespace v8 {
namespace internal {
// The following tests make sure that JSArrayBuffer tracking works expected when
// moving the objects through various spaces during GC phases.
TEST(ArrayBuffer_OnlyMC) {
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
JSArrayBuffer* raw_ab = nullptr;
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(IsTracked(*buf));
raw_ab = *buf;
// Prohibit page from being released.
Page::FromAddress(buf->address())->MarkNeverEvacuate();
}
// 2 GCs are needed because we promote to old space as live, meaning that
// we will survive one GC.
heap::GcAndSweep(heap, OLD_SPACE);
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(!IsTracked(raw_ab));
}
TEST(ArrayBuffer_OnlyScavenge) {
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
JSArrayBuffer* raw_ab = nullptr;
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
raw_ab = *buf;
// Prohibit page from being released.
Page::FromAddress(buf->address())->MarkNeverEvacuate();
}
// 2 GCs are needed because we promote to old space as live, meaning that
// we will survive one GC.
heap::GcAndSweep(heap, OLD_SPACE);
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(!IsTracked(raw_ab));
}
TEST(ArrayBuffer_ScavengeAndMC) {
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
JSArrayBuffer* raw_ab = nullptr;
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
raw_ab = *buf;
// Prohibit page from being released.
Page::FromAddress(buf->address())->MarkNeverEvacuate();
}
// 2 GCs are needed because we promote to old space as live, meaning that
// we will survive one GC.
heap::GcAndSweep(heap, OLD_SPACE);
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(!IsTracked(raw_ab));
}
TEST(ArrayBuffer_Compaction) {
FLAG_manual_evacuation_candidates_selection = true;
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
heap::AbandonCurrentlyFreeMemory(heap->old_space());
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab1 = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf1 = v8::Utils::OpenHandle(*ab1);
CHECK(IsTracked(*buf1));
heap::GcAndSweep(heap, NEW_SPACE);
heap::GcAndSweep(heap, NEW_SPACE);
Page* page_before_gc = Page::FromAddress(buf1->address());
page_before_gc->SetFlag(MemoryChunk::FORCE_EVACUATION_CANDIDATE_FOR_TESTING);
CHECK(IsTracked(*buf1));
heap->CollectAllGarbage();
Page* page_after_gc = Page::FromAddress(buf1->address());
CHECK(IsTracked(*buf1));
CHECK_NE(page_before_gc, page_after_gc);
}
TEST(ArrayBuffer_UnregisterDuringSweep) {
// Regular pages in old space (without compaction) are processed concurrently
// in the sweeper. If we happen to unregister a buffer (either explicitly, or
// implicitly through e.g. |Externalize|) we need to sync with the sweeper
// task.
//
// Note: This test will will only fail on TSAN configurations.
// Disable verify-heap since it forces sweeping to be completed in the
// epilogue of the GC.
#ifdef VERIFY_HEAP
i::FLAG_verify_heap = false;
#endif // VERIFY_HEAP
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
{
v8::HandleScope handle_scope(isolate);
// Allocate another buffer on the same page to force processing a
// non-empty set of buffers in the last GC.
Local<v8::ArrayBuffer> ab2 = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf2 = v8::Utils::OpenHandle(*ab2);
CHECK(IsTracked(*buf));
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
CHECK(IsTracked(*buf));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(*buf));
CHECK(IsTracked(*buf2));
}
heap->CollectGarbage(OLD_SPACE);
// |Externalize| will cause the buffer to be |Unregister|ed. Without
// barriers and proper synchronization this will trigger a data race on
// TSAN.
v8::ArrayBuffer::Contents contents = ab->Externalize();
heap->isolate()->array_buffer_allocator()->Free(contents.Data(),
contents.ByteLength());
}
}
TEST(ArrayBuffer_NonLivePromotion) {
// The test verifies that the marking state is preserved when promoting
// a buffer to old space.
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
JSArrayBuffer* raw_ab = nullptr;
{
v8::HandleScope handle_scope(isolate);
Handle<FixedArray> root =
heap->isolate()->factory()->NewFixedArray(1, TENURED);
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
root->set(0, *buf); // Buffer that should not be promoted as live.
}
heap::SimulateIncrementalMarking(heap, false);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
raw_ab = JSArrayBuffer::cast(root->get(0));
root->set(0, heap->undefined_value());
heap::SimulateIncrementalMarking(heap, true);
// Prohibit page from being released.
Page::FromAddress(raw_ab->address())->MarkNeverEvacuate();
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(!IsTracked(raw_ab));
}
}
TEST(ArrayBuffer_LivePromotion) {
// The test verifies that the marking state is preserved when promoting
// a buffer to old space.
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
JSArrayBuffer* raw_ab = nullptr;
{
v8::HandleScope handle_scope(isolate);
Handle<FixedArray> root =
heap->isolate()->factory()->NewFixedArray(1, TENURED);
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
root->set(0, *buf); // Buffer that should be promoted as live.
}
heap::SimulateIncrementalMarking(heap, true);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
heap::GcAndSweep(heap, NEW_SPACE);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
raw_ab = JSArrayBuffer::cast(root->get(0));
root->set(0, heap->undefined_value());
// Prohibit page from being released.
Page::FromAddress(raw_ab->address())->MarkNeverEvacuate();
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(IsTracked(raw_ab));
}
}
TEST(ArrayBuffer_SemiSpaceCopyThenPagePromotion) {
// The test verifies that the marking state is preserved across semispace
// copy.
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
Heap* heap = reinterpret_cast<Isolate*>(isolate)->heap();
heap::SealCurrentObjects(heap);
{
v8::HandleScope handle_scope(isolate);
Handle<FixedArray> root =
heap->isolate()->factory()->NewFixedArray(1, TENURED);
{
v8::HandleScope handle_scope(isolate);
Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf = v8::Utils::OpenHandle(*ab);
root->set(0, *buf); // Buffer that should be promoted as live.
Page::FromAddress(buf->address())->MarkNeverEvacuate();
}
std::vector<Handle<FixedArray>> handles;
// Make the whole page transition from new->old, getting the buffers
// processed in the sweeper (relying on marking information) instead of
// processing during newspace evacuation.
heap::FillCurrentPage(heap->new_space(), &handles);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
heap::GcAndSweep(heap, NEW_SPACE);
heap::SimulateIncrementalMarking(heap, true);
heap::GcAndSweep(heap, OLD_SPACE);
CHECK(IsTracked(JSArrayBuffer::cast(root->get(0))));
}
}
UNINITIALIZED_TEST(ArrayBuffer_SemiSpaceCopyMultipleTasks) {
if (FLAG_optimize_for_size) return;
// Test allocates JSArrayBuffer on different pages before triggering a
// full GC that performs the semispace copy. If parallelized, this test
// ensures proper synchronization in TSAN configurations.
FLAG_min_semi_space_size = 2;
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
{
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Context::New(isolate)->Enter();
Heap* heap = i_isolate->heap();
Local<v8::ArrayBuffer> ab1 = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf1 = v8::Utils::OpenHandle(*ab1);
heap::FillCurrentPage(heap->new_space());
Local<v8::ArrayBuffer> ab2 = v8::ArrayBuffer::New(isolate, 100);
Handle<JSArrayBuffer> buf2 = v8::Utils::OpenHandle(*ab2);
CHECK_NE(Page::FromAddress(buf1->address()),
Page::FromAddress(buf2->address()));
heap::GcAndSweep(heap, OLD_SPACE);
}
}
} // namespace internal
} // namespace v8