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| 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 |
| 28 #include <stdlib.h> |
| 29 |
| 30 #include "src/v8.h" |
| 31 #include "test/cctest/cctest.h" |
| 32 |
| 33 #include "src/api.h" |
| 34 #include "src/heap/heap.h" |
| 35 #include "src/objects.h" |
| 36 |
| 37 using namespace v8::internal; |
| 38 |
| 39 static Isolate* GetIsolateFrom(LocalContext* context) { |
| 40 return reinterpret_cast<Isolate*>((*context)->GetIsolate()); |
| 41 } |
| 42 |
| 43 |
| 44 static int CountArrayBuffersInWeakList(Heap* heap) { |
| 45 int count = 0; |
| 46 for (Object* o = heap->array_buffers_list(); |
| 47 !o->IsUndefined(); |
| 48 o = JSArrayBuffer::cast(o)->weak_next()) { |
| 49 count++; |
| 50 } |
| 51 return count; |
| 52 } |
| 53 |
| 54 |
| 55 static bool HasArrayBufferInWeakList(Heap* heap, JSArrayBuffer* ab) { |
| 56 for (Object* o = heap->array_buffers_list(); |
| 57 !o->IsUndefined(); |
| 58 o = JSArrayBuffer::cast(o)->weak_next()) { |
| 59 if (ab == o) return true; |
| 60 } |
| 61 return false; |
| 62 } |
| 63 |
| 64 |
| 65 TEST(WeakArrayBuffersFromScript) { |
| 66 v8::V8::Initialize(); |
| 67 LocalContext context; |
| 68 Isolate* isolate = GetIsolateFrom(&context); |
| 69 int start = CountArrayBuffersInWeakList(isolate->heap()); |
| 70 |
| 71 for (int i = 1; i <= 3; i++) { |
| 72 // Create 3 array buffers, make i-th of them garbage, |
| 73 // validate correct state of array buffer weak list. |
| 74 CHECK_EQ(start, CountArrayBuffersInWeakList(isolate->heap())); |
| 75 { |
| 76 v8::HandleScope scope(context->GetIsolate()); |
| 77 |
| 78 { |
| 79 v8::HandleScope s1(context->GetIsolate()); |
| 80 CompileRun("var ab1 = new ArrayBuffer(256);" |
| 81 "var ab2 = new ArrayBuffer(256);" |
| 82 "var ab3 = new ArrayBuffer(256);"); |
| 83 v8::Handle<v8::ArrayBuffer> ab1 = |
| 84 v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab1")); |
| 85 v8::Handle<v8::ArrayBuffer> ab2 = |
| 86 v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab2")); |
| 87 v8::Handle<v8::ArrayBuffer> ab3 = |
| 88 v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab3")); |
| 89 |
| 90 CHECK_EQ(3, CountArrayBuffersInWeakList(isolate->heap()) - start); |
| 91 CHECK(HasArrayBufferInWeakList(isolate->heap(), |
| 92 *v8::Utils::OpenHandle(*ab1))); |
| 93 CHECK(HasArrayBufferInWeakList(isolate->heap(), |
| 94 *v8::Utils::OpenHandle(*ab2))); |
| 95 CHECK(HasArrayBufferInWeakList(isolate->heap(), |
| 96 *v8::Utils::OpenHandle(*ab3))); |
| 97 } |
| 98 |
| 99 i::ScopedVector<char> source(1024); |
| 100 i::SNPrintF(source, "ab%d = null;", i); |
| 101 CompileRun(source.start()); |
| 102 isolate->heap()->CollectAllGarbage(); |
| 103 |
| 104 CHECK_EQ(2, CountArrayBuffersInWeakList(isolate->heap()) - start); |
| 105 |
| 106 { |
| 107 v8::HandleScope s2(context->GetIsolate()); |
| 108 for (int j = 1; j <= 3; j++) { |
| 109 if (j == i) continue; |
| 110 i::SNPrintF(source, "ab%d", j); |
| 111 v8::Handle<v8::ArrayBuffer> ab = |
| 112 v8::Handle<v8::ArrayBuffer>::Cast(CompileRun(source.start())); |
| 113 CHECK(HasArrayBufferInWeakList(isolate->heap(), |
| 114 *v8::Utils::OpenHandle(*ab))); |
| 115 } |
| 116 } |
| 117 |
| 118 CompileRun("ab1 = null; ab2 = null; ab3 = null;"); |
| 119 } |
| 120 |
| 121 isolate->heap()->CollectAllGarbage(); |
| 122 CHECK_EQ(start, CountArrayBuffersInWeakList(isolate->heap())); |
| 123 } |
| 124 } |
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