Recording array buffer views.

test/cctest/test-weaktypedarrays.cc

Index: test/cctest/test-weaktypedarrays.cc
diff --git a/test/cctest/test-weaktypedarrays.cc b/test/cctest/test-weaktypedarrays.cc
new file mode 100644
index 0000000000000000000000000000000000000000..aef610d4965c3b8d17c07bd8e1472fc789d55b3a
--- /dev/null
+++ b/test/cctest/test-weaktypedarrays.cc
@@ -0,0 +1,380 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <stdlib.h>
+
+#include "v8.h"
+#include "api.h"
+#include "heap.h"
+#include "objects.h"
+
+#include "cctest.h"
+
+using namespace v8::internal;
+
+static Isolate* GetIsolateFrom(LocalContext* context) {
+  return reinterpret_cast<Isolate*>((*context)->GetIsolate());
+}
+
+
+static int CountArrayBuffersInWeakList(Heap* heap) {
+  int count = 0;
+  for (Object* o = heap->array_buffers_list();
+       o != Smi::FromInt(0);
+       o = JSArrayBuffer::cast(o)->weak_next()) {
+    count++;
+  }
+  return count;
+}
+
+
+static bool HasArrayBufferInWeakList(Heap* heap, JSArrayBuffer* ab) {
+  for (Object* o = heap->array_buffers_list();
+       o != Smi::FromInt(0);
+       o = JSArrayBuffer::cast(o)->weak_next()) {
+    if (ab == o) return true;
+  }
+  return false;
+}
+
+
+static int CountTypedArrays(JSArrayBuffer* array_buffer) {
+  int count = 0;
+  for (Object* o = array_buffer->weak_first_array();
+       o != Smi::FromInt(0);
+       o = JSTypedArray::cast(o)->weak_next()) {
+    count++;
+  }
+
+  return count;
+}
+
+static bool HasTypedArrayInWeakList(JSArrayBuffer* array_buffer,
+                                    JSTypedArray* ta) {
+  for (Object* o = array_buffer->weak_first_array();
+       o != Smi::FromInt(0);
+       o = JSTypedArray::cast(o)->weak_next()) {
+    if (ta == o) return true;
+  }
+  return false;
+}
+
+
+TEST(WeakArrayBuffersFromApi) {
+  v8::V8::Initialize();
+  LocalContext context;
+  Isolate* isolate = GetIsolateFrom(&context);
+
+  CHECK_EQ(0, CountArrayBuffersInWeakList(isolate->heap()));
+  {
+    v8::HandleScope s1(context->GetIsolate());
+    v8::Handle<v8::ArrayBuffer> ab1 = v8::ArrayBuffer::New(256);
+    {
+      v8::HandleScope s2(context->GetIsolate());
+      v8::Handle<v8::ArrayBuffer> ab2 = v8::ArrayBuffer::New(128);
+
+      Handle<JSArrayBuffer> iab1 = v8::Utils::OpenHandle(*ab1);
+      Handle<JSArrayBuffer> iab2 = v8::Utils::OpenHandle(*ab2);
+      CHECK_EQ(2, CountArrayBuffersInWeakList(isolate->heap()));
+      CHECK(HasArrayBufferInWeakList(isolate->heap(), *iab1));
+      CHECK(HasArrayBufferInWeakList(isolate->heap(), *iab2));
+    }
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()));
+    {
+      HandleScope scope2(isolate);
+      Handle<JSArrayBuffer> iab1 = v8::Utils::OpenHandle(*ab1);
+
+      CHECK(HasArrayBufferInWeakList(isolate->heap(), *iab1));
+    }
+  }
+
+  isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+  isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+  CHECK_EQ(0, CountArrayBuffersInWeakList(isolate->heap()));
+}
+
+
+TEST(WeakArrayBuffersFromScript) {
+  v8::V8::Initialize();
+  LocalContext context;
+  Isolate* isolate = GetIsolateFrom(&context);
+
+  for (int i = 1; i <= 3; i++) {
+    // Create 3 array buffers, make i-th of them garbage,
+    // validate correct state of array buffer weak list.
+    CHECK_EQ(0, CountArrayBuffersInWeakList(isolate->heap()));
+    {
+      v8::HandleScope scope(context->GetIsolate());
+
+      {
+        v8::HandleScope s1(context->GetIsolate());
+        CompileRun("var ab1 = new ArrayBuffer(256);"
+                   "var ab2 = new ArrayBuffer(256);"
+                   "var ab3 = new ArrayBuffer(256);");
+        v8::Handle<v8::ArrayBuffer> ab1(
+            v8::ArrayBuffer::Cast(*CompileRun("ab1")));
+        v8::Handle<v8::ArrayBuffer> ab2(
+            v8::ArrayBuffer::Cast(*CompileRun("ab2")));
+        v8::Handle<v8::ArrayBuffer> ab3(
+            v8::ArrayBuffer::Cast(*CompileRun("ab3")));
+
+        CHECK_EQ(3, CountArrayBuffersInWeakList(isolate->heap()));
+        CHECK(HasArrayBufferInWeakList(isolate->heap(),
+              *v8::Utils::OpenHandle(*ab1)));
+        CHECK(HasArrayBufferInWeakList(isolate->heap(),
+              *v8::Utils::OpenHandle(*ab2)));
+        CHECK(HasArrayBufferInWeakList(isolate->heap(),
+              *v8::Utils::OpenHandle(*ab3)));
+      }
+
+      i::ScopedVector<char> source(1024);
+      i::OS::SNPrintF(source, "ab%d = null;", i);
+      CompileRun(source.start());
+      isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+      isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+
+      CHECK_EQ(2, CountArrayBuffersInWeakList(isolate->heap()));
+
+      {
+        v8::HandleScope s2(context->GetIsolate());
+        for (int j = 1; j <= 3; j++) {
+          if (j == i) continue;
+          i::OS::SNPrintF(source, "ab%d", j);
+          v8::Handle<v8::ArrayBuffer> ab(
+              v8::ArrayBuffer::Cast(*CompileRun(source.start())));
+          CHECK(HasArrayBufferInWeakList(isolate->heap(),
+                *v8::Utils::OpenHandle(*ab)));
+          }
+      }
+
+      CompileRun("ab1 = null; ab2 = null; ab3 = null;");
+    }
+
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    CHECK_EQ(0, CountArrayBuffersInWeakList(isolate->heap()));
+  }
+}
+
+template <typename TypedArray>
+void TestTypedArrayFromApi() {
+  v8::V8::Initialize();
+  LocalContext context;
+  Isolate* isolate = GetIsolateFrom(&context);
+
+  v8::HandleScope s1(context->GetIsolate());
+  v8::Handle<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(2048);
+  Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
+  {
+    v8::HandleScope s2(context->GetIsolate());
+    v8::Handle<TypedArray> ta1 = TypedArray::New(ab, 0, 256);
+    {
+      v8::HandleScope s3(context->GetIsolate());
+      v8::Handle<TypedArray> ta2 = TypedArray::New(ab, 0, 128);
+
+      Handle<JSTypedArray> ita1 = v8::Utils::OpenHandle(*ta1);
+      Handle<JSTypedArray> ita2 = v8::Utils::OpenHandle(*ta2);
+      CHECK_EQ(2, CountTypedArrays(*iab));
+      CHECK(HasTypedArrayInWeakList(*iab, *ita1));
+      CHECK(HasTypedArrayInWeakList(*iab, *ita2));
+    }
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    CHECK_EQ(1, CountTypedArrays(*iab));
+    Handle<JSTypedArray> ita1 = v8::Utils::OpenHandle(*ta1);
+    CHECK(HasTypedArrayInWeakList(*iab, *ita1));
+  }
+  isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+  isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+
+  CHECK_EQ(0, CountTypedArrays(*iab));
+}
+
+
+TEST(Uint8ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Uint8Array>();
+}
+
+
+TEST(Int8ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Int8Array>();
+}
+
+
+TEST(Uint16ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Uint16Array>();
+}
+
+
+TEST(Int16ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Int16Array>();
+}
+
+
+TEST(Uint32ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Uint32Array>();
+}
+
+
+TEST(Int32ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Int32Array>();
+}
+
+
+TEST(Float32ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Float32Array>();
+}
+
+
+TEST(Float64ArrayFromApi) {
+  TestTypedArrayFromApi<v8::Float64Array>();
+}
+
+
+TEST(Uint8ClampedArrayFromApi) {
+  TestTypedArrayFromApi<v8::Uint8ClampedArray>();
+}
+
+template <typename TypedArray>
+static void TestTypedArrayFromScript(const char* constructor) {
+  v8::V8::Initialize();
+  LocalContext context;
+  Isolate* isolate = GetIsolateFrom(&context);
+  v8::HandleScope scope(context->GetIsolate());
+  CompileRun("var ab = new ArrayBuffer(2048);");
+  for (int i = 1; i <= 3; i++) {
+    // Create 3 typed arrays, make i-th of them garbage,
+    // validate correct state of typed array weak list.
+    v8::HandleScope s0(context->GetIsolate());
+    i::ScopedVector<char> source(2048);
+
+    CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()));
+
+    {
+      v8::HandleScope s1(context->GetIsolate());
+      i::OS::SNPrintF(source,
+                  "var ta1 = new %s(ab);"
+                  "var ta2 = new %s(ab);"
+                  "var ta3 = new %s(ab)",
+                  constructor, constructor, constructor);
+
+      CompileRun(source.start());
+      v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
+      v8::Handle<TypedArray> ta1(TypedArray::Cast(*CompileRun("ta1")));
+      v8::Handle<TypedArray> ta2(TypedArray::Cast(*CompileRun("ta2")));
+      v8::Handle<TypedArray> ta3(TypedArray::Cast(*CompileRun("ta3")));
+      CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()));
+      Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
+      CHECK_EQ(3, CountTypedArrays(*iab));
+      CHECK(HasTypedArrayInWeakList(*iab, *v8::Utils::OpenHandle(*ta1)));
+      CHECK(HasTypedArrayInWeakList(*iab, *v8::Utils::OpenHandle(*ta2)));
+      CHECK(HasTypedArrayInWeakList(*iab, *v8::Utils::OpenHandle(*ta3)));
+    }
+
+    i::OS::SNPrintF(source, "ta%d = null;", i);
+    CompileRun(source.start());
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+
+    CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()));
+
+    {
+      v8::HandleScope s2(context->GetIsolate());
+      v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
+      Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
+      CHECK_EQ(2, CountTypedArrays(*iab));
+      for (int j = 1; j <= 3; j++) {
+        if (j == i) continue;
+        i::OS::SNPrintF(source, "ta%d", j);
+        v8::Handle<TypedArray> ta(
+            TypedArray::Cast(*CompileRun(source.start())));
+        CHECK(HasTypedArrayInWeakList(*iab, *v8::Utils::OpenHandle(*ta)));
+      }
+    }
+
+    CompileRun("ta1 = null; ta2 = null; ta3 = null;");
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+    isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
+
+    CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()));
+
+    {
+      v8::HandleScope s3(context->GetIsolate());
+      v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
+      Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
+      CHECK_EQ(0, CountTypedArrays(*iab));
+    }
+  }
+}
+
+
+TEST(Uint8ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Uint8Array>("Uint8Array");
+}
+
+
+TEST(Int8ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Int8Array>("Int8Array");
+}
+
+
+TEST(Uint16ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Uint16Array>("Uint16Array");
+}
+
+
+TEST(Int16ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Int16Array>("Int16Array");
+}
+
+
+TEST(Uint32ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Uint32Array>("Uint32Array");
+}
+
+
+TEST(Int32ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Int32Array>("Int32Array");
+}
+
+
+TEST(Float32ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Float32Array>("Float32Array");
+}
+
+
+TEST(Float64ArrayFromScript) {
+  TestTypedArrayFromScript<v8::Float64Array>("Float64Array");
+}
+
+
+TEST(Uint8ClampedArrayFromScript) {
+  TestTypedArrayFromScript<v8::Uint8ClampedArray>("Uint8ClampedArray");
+}
+