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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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70 TEST(BadMementoAfterTopForceScavenge) { | 70 TEST(BadMementoAfterTopForceScavenge) { |
71 CcTest::InitializeVM(); | 71 CcTest::InitializeVM(); |
72 if (!i::FLAG_allocation_site_pretenuring) return; | 72 if (!i::FLAG_allocation_site_pretenuring) return; |
73 v8::HandleScope scope(CcTest::isolate()); | 73 v8::HandleScope scope(CcTest::isolate()); |
74 | 74 |
75 SetUpNewSpaceWithPoisonedMementoAtTop(); | 75 SetUpNewSpaceWithPoisonedMementoAtTop(); |
76 | 76 |
77 // Force GC to test the poisoned memento handling | 77 // Force GC to test the poisoned memento handling |
78 CcTest::i_isolate()->heap()->CollectGarbage(i::NEW_SPACE); | 78 CcTest::i_isolate()->heap()->CollectGarbage(i::NEW_SPACE); |
79 } | 79 } |
| 80 |
| 81 |
| 82 TEST(PretenuringCallNew) { |
| 83 CcTest::InitializeVM(); |
| 84 if (!i::FLAG_allocation_site_pretenuring) return; |
| 85 if (!i::FLAG_pretenuring_call_new) return; |
| 86 |
| 87 v8::HandleScope scope(CcTest::isolate()); |
| 88 Isolate* isolate = CcTest::i_isolate(); |
| 89 Heap* heap = isolate->heap(); |
| 90 |
| 91 // We need to create several instances to get past the slack-tracking |
| 92 // phase, where mementos aren't emitted. |
| 93 int call_count = 10; |
| 94 CHECK_GE(call_count, SharedFunctionInfo::kGenerousAllocationCount); |
| 95 i::ScopedVector<char> test_buf(1024); |
| 96 const char* program = |
| 97 "function f() {" |
| 98 " this.a = 3;" |
| 99 " this.b = {};" |
| 100 " return this;" |
| 101 "};" |
| 102 "var a;" |
| 103 "for(var i = 0; i < %d; i++) {" |
| 104 " a = new f();" |
| 105 "}" |
| 106 "a;"; |
| 107 i::OS::SNPrintF(test_buf, program, call_count); |
| 108 v8::Local<v8::Value> res = CompileRun(test_buf.start()); |
| 109 Handle<JSObject> o = |
| 110 v8::Utils::OpenHandle(*v8::Handle<v8::Object>::Cast(res)); |
| 111 |
| 112 // The object of class f should have a memento secreted behind it. |
| 113 Address memento_address = o->address() + o->map()->instance_size(); |
| 114 AllocationMemento* memento = |
| 115 reinterpret_cast<AllocationMemento*>(memento_address + kHeapObjectTag); |
| 116 CHECK_EQ(memento->map(), heap->allocation_memento_map()); |
| 117 |
| 118 // Furthermore, how many mementos did we create? The count should match |
| 119 // call_count - SharedFunctionInfo::kGenerousAllocationCount. |
| 120 AllocationSite* site = memento->GetAllocationSite(); |
| 121 CHECK_EQ(call_count - SharedFunctionInfo::kGenerousAllocationCount, |
| 122 site->pretenure_create_count()->value()); |
| 123 } |
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