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27
28#include "test/cctest/cctest.h"
29
30using namespace v8::internal;
31
32
33static void SetUpNewSpaceWithPoisonedMementoAtTop() {
34  Isolate* isolate = CcTest::i_isolate();
35  Heap* heap = isolate->heap();
36  NewSpace* new_space = heap->new_space();
37
38  // Make sure we can allocate some objects without causing a GC later.
39  heap->CollectAllGarbage();
40
41  // Allocate a string, the GC may suspect a memento behind the string.
42  Handle<SeqOneByteString> string =
43      isolate->factory()->NewRawOneByteString(12).ToHandleChecked();
44  CHECK(*string);
45
46  // Create an allocation memento behind the string with a garbage allocation
47  // site pointer.
48  AllocationMemento* memento =
49      reinterpret_cast<AllocationMemento*>(new_space->top() + kHeapObjectTag);
50  memento->set_map_no_write_barrier(heap->allocation_memento_map());
51  memento->set_allocation_site(
52      reinterpret_cast<AllocationSite*>(kHeapObjectTag), SKIP_WRITE_BARRIER);
53}
54
55
56TEST(Regress340063) {
57  CcTest::InitializeVM();
58  if (!i::FLAG_allocation_site_pretenuring) return;
59  v8::HandleScope scope(CcTest::isolate());
60
61  SetUpNewSpaceWithPoisonedMementoAtTop();
62
63  // Call GC to see if we can handle a poisonous memento right after the
64  // current new space top pointer.
65  CcTest::i_isolate()->heap()->CollectAllGarbage(
66      Heap::kAbortIncrementalMarkingMask);
67}
68
69
70TEST(Regress470390) {
71  CcTest::InitializeVM();
72  if (!i::FLAG_allocation_site_pretenuring) return;
73  v8::HandleScope scope(CcTest::isolate());
74
75  SetUpNewSpaceWithPoisonedMementoAtTop();
76
77  // Set the new space limit to be equal to the top.
78  Address top = CcTest::i_isolate()->heap()->new_space()->top();
79  *(CcTest::i_isolate()->heap()->new_space()->allocation_limit_address()) = top;
80
81  // Call GC to see if we can handle a poisonous memento right after the
82  // current new space top pointer.
83  CcTest::i_isolate()->heap()->CollectAllGarbage(
84      Heap::kAbortIncrementalMarkingMask);
85}
86
87
88TEST(BadMementoAfterTopForceScavenge) {
89  CcTest::InitializeVM();
90  if (!i::FLAG_allocation_site_pretenuring) return;
91  v8::HandleScope scope(CcTest::isolate());
92
93  SetUpNewSpaceWithPoisonedMementoAtTop();
94
95  // Force GC to test the poisoned memento handling
96  CcTest::i_isolate()->heap()->CollectGarbage(i::NEW_SPACE);
97}
98