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27
28 #include "test/cctest/cctest.h"
29
30 using namespace v8::internal;
31
32
SetUpNewSpaceWithPoisonedMementoAtTop()33 static 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
TEST(Regress340063)56 TEST(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
TEST(Regress470390)70 TEST(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
TEST(BadMementoAfterTopForceScavenge)88 TEST(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