Add v8::HeapGraphNode::GetHeapValue method.

test/cctest/test-heap-profiler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 //
 // Tests for heap profiler
 
 #include "v8.h"
 
 #include "cctest.h"
 #include "heap-profiler.h"
 #include "snapshot.h"
 #include "utils-inl.h"
@@ skipping 67 matching lines @@
   LocalContext env2;
 
   CompileRun(
       "function A2() {}\n"
       "function B2(x) { return function() { return typeof x; }; }\n"
       "function C2(x) { this.x1 = x; this.x2 = x; this[1] = x; }\n"
       "var a2 = new A2();\n"
       "var b2_1 = new B2(a2), b2_2 = new B2(a2);\n"
       "var c2 = new C2(a2);");
   const v8::HeapSnapshot* snapshot_env2 =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("env2"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("env2"));
   i::HeapSnapshot* i_snapshot_env2 =
       const_cast<i::HeapSnapshot*>(
           reinterpret_cast<const i::HeapSnapshot*>(snapshot_env2));
   const v8::HeapGraphNode* global_env2 = GetGlobalObject(snapshot_env2);
   // Paint all nodes reachable from global object.
   i_snapshot_env2->ClearPaint();
   const_cast<i::HeapEntry*>(
       reinterpret_cast<const i::HeapEntry*>(global_env2))->PaintAllReachable();
 
   // Verify, that JS global object of env2 has '..2' properties.
@@ skipping 18 matching lines @@
   v8::HandleScope scope;
   LocalContext env;
 
   //   -a-> X1 --a
   // x -b-> X2 <-|
   CompileRun(
       "function X(a, b) { this.a = a; this.b = b; }\n"
       "x = new X(new X(), new X());\n"
       "(function() { x.a.a = x.b; })();");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("sizes"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("sizes"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   const v8::HeapGraphNode* x =
       GetProperty(global, v8::HeapGraphEdge::kShortcut, "x");
   CHECK_NE(NULL, x);
   const v8::HeapGraphNode* x1 =
       GetProperty(x, v8::HeapGraphEdge::kProperty, "a");
   CHECK_NE(NULL, x1);
   const v8::HeapGraphNode* x2 =
       GetProperty(x, v8::HeapGraphEdge::kProperty, "b");
   CHECK_NE(NULL, x2);
@@ skipping 10 matching lines @@
 
 
 TEST(HeapSnapshotEntryChildren) {
   v8::HandleScope scope;
   LocalContext env;
 
   CompileRun(
       "function A() { }\n"
       "a = new A;");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("children"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("children"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   for (int i = 0, count = global->GetChildrenCount(); i < count; ++i) {
     const v8::HeapGraphEdge* prop = global->GetChild(i);
     CHECK_EQ(global, prop->GetFromNode());
   }
   const v8::HeapGraphNode* a =
       GetProperty(global, v8::HeapGraphEdge::kProperty, "a");
   CHECK_NE(NULL, a);
   for (int i = 0, count = a->GetChildrenCount(); i < count; ++i) {
     const v8::HeapGraphEdge* prop = a->GetChild(i);
     CHECK_EQ(a, prop->GetFromNode());
   }
 }
 
 
 TEST(HeapSnapshotCodeObjects) {
   v8::HandleScope scope;
   LocalContext env;
 
   CompileRun(
       "function lazy(x) { return x - 1; }\n"
       "function compiled(x) { return x + 1; }\n"
       "var anonymous = (function() { return function() { return 0; } })();\n"
       "compiled(1)");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("code"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("code"));
 
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   const v8::HeapGraphNode* compiled =
       GetProperty(global, v8::HeapGraphEdge::kShortcut, "compiled");
   CHECK_NE(NULL, compiled);
   CHECK_EQ(v8::HeapGraphNode::kClosure, compiled->GetType());
   const v8::HeapGraphNode* lazy =
       GetProperty(global, v8::HeapGraphEdge::kShortcut, "lazy");
   CHECK_NE(NULL, lazy);
   CHECK_EQ(v8::HeapGraphNode::kClosure, lazy->GetType());
@@ skipping 41 matching lines @@
 }
 
 
 TEST(HeapSnapshotHeapNumbers) {
   v8::HandleScope scope;
   LocalContext env;
   CompileRun(
       "a = 1;    // a is Smi\n"
       "b = 2.5;  // b is HeapNumber");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("numbers"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("numbers"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   CHECK_EQ(NULL, GetProperty(global, v8::HeapGraphEdge::kShortcut, "a"));
   const v8::HeapGraphNode* b =
       GetProperty(global, v8::HeapGraphEdge::kShortcut, "b");
   CHECK_NE(NULL, b);
   CHECK_EQ(v8::HeapGraphNode::kHeapNumber, b->GetType());
 }
 
 
 TEST(HeapSnapshotInternalReferences) {
   v8::HandleScope scope;
   v8::Local<v8::ObjectTemplate> global_template = v8::ObjectTemplate::New();
   global_template->SetInternalFieldCount(2);
   LocalContext env(NULL, global_template);
   v8::Handle<v8::Object> global_proxy = env->Global();
   v8::Handle<v8::Object> global = global_proxy->GetPrototype().As<v8::Object>();
   CHECK_EQ(2, global->InternalFieldCount());
   v8::Local<v8::Object> obj = v8::Object::New();
   global->SetInternalField(0, v8_num(17));
   global->SetInternalField(1, obj);
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("internals"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("internals"));
   const v8::HeapGraphNode* global_node = GetGlobalObject(snapshot);
   // The first reference will not present, because it's a Smi.
   CHECK_EQ(NULL, GetProperty(global_node, v8::HeapGraphEdge::kInternal, "0"));
   // The second reference is to an object.
   CHECK_NE(NULL, GetProperty(global_node, v8::HeapGraphEdge::kInternal, "1"));
 }
 
 
 // Trying to introduce a check helper for uint64_t causes many
 // overloading ambiguities, so it seems easier just to cast
 // them to a signed type.
 #define CHECK_EQ_UINT64_T(a, b) \
   CHECK_EQ(static_cast<int64_t>(a), static_cast<int64_t>(b))
 #define CHECK_NE_UINT64_T(a, b) \
   CHECK((a) != (b))  // NOLINT
 
 TEST(HeapEntryIdsAndGC) {
   v8::HandleScope scope;
   LocalContext env;
 
   CompileRun(
       "function A() {}\n"
       "function B(x) { this.x = x; }\n"
       "var a = new A();\n"
       "var b = new B(a);");
   const v8::HeapSnapshot* snapshot1 =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("s1"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("s1"));
 
   HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
 
   const v8::HeapSnapshot* snapshot2 =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("s2"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("s2"));
 
   const v8::HeapGraphNode* global1 = GetGlobalObject(snapshot1);
   const v8::HeapGraphNode* global2 = GetGlobalObject(snapshot2);
   CHECK_NE_UINT64_T(0, global1->GetId());
   CHECK_EQ_UINT64_T(global1->GetId(), global2->GetId());
   const v8::HeapGraphNode* A1 =
       GetProperty(global1, v8::HeapGraphEdge::kProperty, "A");
   CHECK_NE(NULL, A1);
   const v8::HeapGraphNode* A2 =
       GetProperty(global2, v8::HeapGraphEdge::kProperty, "A");
@@ skipping 24 matching lines @@
   CHECK_NE(NULL, b2);
   CHECK_NE_UINT64_T(0, b1->GetId());
   CHECK_EQ_UINT64_T(b1->GetId(), b2->GetId());
 }
 
 
 TEST(HeapSnapshotRootPreservedAfterSorting) {
   v8::HandleScope scope;
   LocalContext env;
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("s"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("s"));
   const v8::HeapGraphNode* root1 = snapshot->GetRoot();
   const_cast<i::HeapSnapshot*>(reinterpret_cast<const i::HeapSnapshot*>(
       snapshot))->GetSortedEntriesList();
   const v8::HeapGraphNode* root2 = snapshot->GetRoot();
   CHECK_EQ(root1, root2);
 }
 
 
 TEST(HeapEntryDominator) {
   // The graph looks like this:
@@ skipping 17 matching lines @@
       "function X(a, b) { this.a = a; this.b = b; }\n"
       "node6 = new X(new X(new X()), new X(new X(),new X()));\n"
       "(function(){\n"
       "node6.a.a.b = node6.b.a;  // node1 -> node2\n"
       "node6.b.a.a = node6.a.a;  // node2 -> node1\n"
       "node6.b.a.b = node6.b.b;  // node2 -> node3\n"
       "node6.b.b.a = node6.b.a;  // node3 -> node2\n"
       "})();");
 
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("dominators"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("dominators"));
 
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   CHECK_NE(NULL, global);
   const v8::HeapGraphNode* node6 =
       GetProperty(global, v8::HeapGraphEdge::kShortcut, "node6");
   CHECK_NE(NULL, node6);
   const v8::HeapGraphNode* node5 =
       GetProperty(node6, v8::HeapGraphEdge::kProperty, "a");
   CHECK_NE(NULL, node5);
   const v8::HeapGraphNode* node4 =
@@ skipping 62 matching lines @@
   LocalContext env;
 
 #define STRING_LITERAL_FOR_TEST \
   "\"String \\n\\r\\u0008\\u0081\\u0101\\u0801\\u8001\""
   CompileRun(
       "function A(s) { this.s = s; }\n"
       "function B(x) { this.x = x; }\n"
       "var a = new A(" STRING_LITERAL_FOR_TEST ");\n"
       "var b = new B(a);");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("json"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("json"));
   TestJSONStream stream;
   snapshot->Serialize(&stream, v8::HeapSnapshot::kJSON);
   CHECK_GT(stream.size(), 0);
   CHECK_EQ(1, stream.eos_signaled());
   i::ScopedVector<char> json(stream.size());
   stream.WriteTo(json);
 
   // Verify that snapshot string is valid JSON.
   AsciiResource json_res(json);
   v8::Local<v8::String> json_string = v8::String::NewExternal(&json_res);
-  env->Global()->Set(v8::String::New("json_snapshot"), json_string);
+  env->Global()->Set(v8_str("json_snapshot"), json_string);
   v8::Local<v8::Value> snapshot_parse_result = CompileRun(
       "var parsed = JSON.parse(json_snapshot); true;");
   CHECK(!snapshot_parse_result.IsEmpty());
 
   // Verify that snapshot object has required fields.
   v8::Local<v8::Object> parsed_snapshot =
-      env->Global()->Get(v8::String::New("parsed"))->ToObject();
-  CHECK(parsed_snapshot->Has(v8::String::New("snapshot")));
-  CHECK(parsed_snapshot->Has(v8::String::New("nodes")));
-  CHECK(parsed_snapshot->Has(v8::String::New("strings")));
+      env->Global()->Get(v8_str("parsed"))->ToObject();
+  CHECK(parsed_snapshot->Has(v8_str("snapshot")));
+  CHECK(parsed_snapshot->Has(v8_str("nodes")));
+  CHECK(parsed_snapshot->Has(v8_str("strings")));
 
   // Get node and edge "member" offsets.
   v8::Local<v8::Value> meta_analysis_result = CompileRun(
       "var parsed_meta = parsed.nodes[0];\n"
       "var children_count_offset ="
       "    parsed_meta.fields.indexOf('children_count');\n"
       "var children_offset ="
       "    parsed_meta.fields.indexOf('children');\n"
       "var children_meta ="
       "    parsed_meta.types[children_offset];\n"
@@ skipping 31 matching lines @@
       "  GetChildPosByProperty(\n"
       "    GetChildPosByProperty("
       "      parsed.nodes[1 + children_offset + child_to_node_offset],"
       "      \"b\",shortcut_type),\n"
       "    \"x\", property_type),"
       "  \"s\", property_type)");
   CHECK(!string_obj_pos_val.IsEmpty());
   int string_obj_pos =
       static_cast<int>(string_obj_pos_val->ToNumber()->Value());
   v8::Local<v8::Object> nodes_array =
-      parsed_snapshot->Get(v8::String::New("nodes"))->ToObject();
+      parsed_snapshot->Get(v8_str("nodes"))->ToObject();
   int string_index = static_cast<int>(
       nodes_array->Get(string_obj_pos + 1)->ToNumber()->Value());
   CHECK_GT(string_index, 0);
   v8::Local<v8::Object> strings_array =
-      parsed_snapshot->Get(v8::String::New("strings"))->ToObject();
+      parsed_snapshot->Get(v8_str("strings"))->ToObject();
   v8::Local<v8::String> string = strings_array->Get(string_index)->ToString();
   v8::Local<v8::String> ref_string =
       CompileRun(STRING_LITERAL_FOR_TEST)->ToString();
 #undef STRING_LITERAL_FOR_TEST
   CHECK_EQ(*v8::String::Utf8Value(ref_string),
            *v8::String::Utf8Value(string));
 }
 
 
 TEST(HeapSnapshotJSONSerializationAborting) {
   v8::HandleScope scope;
   LocalContext env;
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("abort"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("abort"));
   TestJSONStream stream(5);
   snapshot->Serialize(&stream, v8::HeapSnapshot::kJSON);
   CHECK_GT(stream.size(), 0);
   CHECK_EQ(0, stream.eos_signaled());
 }
 
 
 TEST(HeapSnapshotGetNodeById) {
   v8::HandleScope scope;
   LocalContext env;
 
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("id"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("id"));
   const v8::HeapGraphNode* root = snapshot->GetRoot();
   CHECK_EQ(root, snapshot->GetNodeById(root->GetId()));
   for (int i = 0, count = root->GetChildrenCount(); i < count; ++i) {
     const v8::HeapGraphEdge* prop = root->GetChild(i);
     CHECK_EQ(
         prop->GetToNode(), snapshot->GetNodeById(prop->GetToNode()->GetId()));
   }
   // Check a big id, which should not exist yet.
   CHECK_EQ(NULL, snapshot->GetNodeById(0x1000000UL));
 }
@@ skipping 20 matching lines @@
 };
 }
 
 TEST(TakeHeapSnapshotAborting) {
   v8::HandleScope scope;
   LocalContext env;
 
   const int snapshots_count = v8::HeapProfiler::GetSnapshotsCount();
   TestActivityControl aborting_control(3);
   const v8::HeapSnapshot* no_snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("abort"),
+      v8::HeapProfiler::TakeSnapshot(v8_str("abort"),
                                      v8::HeapSnapshot::kFull,
                                      &aborting_control);
   CHECK_EQ(NULL, no_snapshot);
   CHECK_EQ(snapshots_count, v8::HeapProfiler::GetSnapshotsCount());
   CHECK_GT(aborting_control.total(), aborting_control.done());
 
   TestActivityControl control(-1);  // Don't abort.
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("full"),
+      v8::HeapProfiler::TakeSnapshot(v8_str("full"),
                                      v8::HeapSnapshot::kFull,
                                      &control);
   CHECK_NE(NULL, snapshot);
   CHECK_EQ(snapshots_count + 1, v8::HeapProfiler::GetSnapshotsCount());
   CHECK_EQ(control.total(), control.done());
   CHECK_GT(control.total(), 0);
 }
 
 
 namespace {
@@ skipping 89 matching lines @@
       v8::Persistent<v8::String>::New(v8_str("AAA"));
   p_AAA.SetWrapperClassId(1);
   v8::Persistent<v8::String> p_BBB =
       v8::Persistent<v8::String>::New(v8_str("BBB"));
   p_BBB.SetWrapperClassId(1);
   v8::Persistent<v8::String> p_CCC =
       v8::Persistent<v8::String>::New(v8_str("CCC"));
   p_CCC.SetWrapperClassId(2);
   CHECK_EQ(0, TestRetainedObjectInfo::instances.length());
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("retained"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("retained"));
 
   CHECK_EQ(3, TestRetainedObjectInfo::instances.length());
   for (int i = 0; i < TestRetainedObjectInfo::instances.length(); ++i) {
     CHECK(TestRetainedObjectInfo::instances[i]->disposed());
     delete TestRetainedObjectInfo::instances[i];
   }
 
   const v8::HeapGraphNode* natives = GetNode(
       snapshot->GetRoot(), v8::HeapGraphNode::kObject, "(Native objects)");
   CHECK_NE(NULL, natives);
@@ skipping 23 matching lines @@
 }
 
 
 TEST(DeleteAllHeapSnapshots) {
   v8::HandleScope scope;
   LocalContext env;
 
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
   v8::HeapProfiler::DeleteAllSnapshots();
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
-  CHECK_NE(NULL, v8::HeapProfiler::TakeSnapshot(v8::String::New("1")));
+  CHECK_NE(NULL, v8::HeapProfiler::TakeSnapshot(v8_str("1")));
   CHECK_EQ(1, v8::HeapProfiler::GetSnapshotsCount());
   v8::HeapProfiler::DeleteAllSnapshots();
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
-  CHECK_NE(NULL, v8::HeapProfiler::TakeSnapshot(v8::String::New("1")));
-  CHECK_NE(NULL, v8::HeapProfiler::TakeSnapshot(v8::String::New("2")));
+  CHECK_NE(NULL, v8::HeapProfiler::TakeSnapshot(v8_str("1")));
+  CHECK_NE(NULL, v8::HeapProfiler::TakeSnapshot(v8_str("2")));
   CHECK_EQ(2, v8::HeapProfiler::GetSnapshotsCount());
   v8::HeapProfiler::DeleteAllSnapshots();
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
 }
 
 
 TEST(DeleteHeapSnapshot) {
   v8::HandleScope scope;
   LocalContext env;
 
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
   const v8::HeapSnapshot* s1 =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("1"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("1"));
   CHECK_NE(NULL, s1);
   CHECK_EQ(1, v8::HeapProfiler::GetSnapshotsCount());
   unsigned uid1 = s1->GetUid();
   CHECK_EQ(s1, v8::HeapProfiler::FindSnapshot(uid1));
   const_cast<v8::HeapSnapshot*>(s1)->Delete();
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
   CHECK_EQ(NULL, v8::HeapProfiler::FindSnapshot(uid1));
 
   const v8::HeapSnapshot* s2 =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("2"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("2"));
   CHECK_NE(NULL, s2);
   CHECK_EQ(1, v8::HeapProfiler::GetSnapshotsCount());
   unsigned uid2 = s2->GetUid();
   CHECK_NE(static_cast<int>(uid1), static_cast<int>(uid2));
   CHECK_EQ(s2, v8::HeapProfiler::FindSnapshot(uid2));
   const v8::HeapSnapshot* s3 =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("3"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("3"));
   CHECK_NE(NULL, s3);
   CHECK_EQ(2, v8::HeapProfiler::GetSnapshotsCount());
   unsigned uid3 = s3->GetUid();
   CHECK_NE(static_cast<int>(uid1), static_cast<int>(uid3));
   CHECK_EQ(s3, v8::HeapProfiler::FindSnapshot(uid3));
   const_cast<v8::HeapSnapshot*>(s2)->Delete();
   CHECK_EQ(1, v8::HeapProfiler::GetSnapshotsCount());
   CHECK_EQ(NULL, v8::HeapProfiler::FindSnapshot(uid2));
   CHECK_EQ(s3, v8::HeapProfiler::FindSnapshot(uid3));
   const_cast<v8::HeapSnapshot*>(s3)->Delete();
   CHECK_EQ(0, v8::HeapProfiler::GetSnapshotsCount());
   CHECK_EQ(NULL, v8::HeapProfiler::FindSnapshot(uid3));
 }
 
 
 TEST(DocumentURL) {
   v8::HandleScope scope;
   LocalContext env;
 
   CompileRun("document = { URL:\"abcdefgh\" };");
 
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("document"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("document"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   CHECK_NE(NULL, global);
   CHECK_EQ("Object / abcdefgh",
            const_cast<i::HeapEntry*>(
                reinterpret_cast<const i::HeapEntry*>(global))->name());
 }
 
 
 TEST(DocumentWithException) {
   v8::HandleScope scope;
   LocalContext env;
 
   CompileRun(
       "this.__defineGetter__(\"document\", function() { throw new Error(); })");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("document"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("document"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   CHECK_NE(NULL, global);
   CHECK_EQ("Object",
            const_cast<i::HeapEntry*>(
                reinterpret_cast<const i::HeapEntry*>(global))->name());
 }
 
 
 TEST(DocumentURLWithException) {
   v8::HandleScope scope;
   LocalContext env;
 
   CompileRun(
       "function URLWithException() {}\n"
       "URLWithException.prototype = { get URL() { throw new Error(); } };\n"
       "document = { URL: new URLWithException() };");
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("document"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("document"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   CHECK_NE(NULL, global);
   CHECK_EQ("Object",
            const_cast<i::HeapEntry*>(
                reinterpret_cast<const i::HeapEntry*>(global))->name());
 }
 
 
 TEST(NodesIteration) {
   v8::HandleScope scope;
   LocalContext env;
   const v8::HeapSnapshot* snapshot =
-      v8::HeapProfiler::TakeSnapshot(v8::String::New("iteration"));
+      v8::HeapProfiler::TakeSnapshot(v8_str("iteration"));
   const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
   CHECK_NE(NULL, global);
   // Verify that we can find this object by iteration.
   const int nodes_count = snapshot->GetNodesCount();
   int count = 0;
   for (int i = 0; i < nodes_count; ++i) {
     if (snapshot->GetNode(i) == global)
       ++count;
   }
   CHECK_EQ(1, count);
 }
 
 
+TEST(GetHeapValue) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  CompileRun("a = { s_prop: \'value\', n_prop: 0.1 };");
+  const v8::HeapSnapshot* snapshot =
+      v8::HeapProfiler::TakeSnapshot(v8_str("value"));
+  const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
+  CHECK(global->GetHeapValue()->IsObject());
+  v8::Local<v8::Object> js_global =
+      env->Global()->GetPrototype().As<v8::Object>();
+  CHECK(js_global == global->GetHeapValue());
+  const v8::HeapGraphNode* obj = GetProperty(
+      global, v8::HeapGraphEdge::kShortcut, "a");
+  CHECK(obj->GetHeapValue()->IsObject());
+  v8::Local<v8::Object> js_obj = js_global->Get(v8_str("a")).As<v8::Object>();
+  CHECK(js_obj == obj->GetHeapValue());
+  const v8::HeapGraphNode* s_prop =
+      GetProperty(obj, v8::HeapGraphEdge::kProperty, "s_prop");
+  v8::Local<v8::String> js_s_prop =
+      js_obj->Get(v8_str("s_prop")).As<v8::String>();
+  CHECK(js_s_prop == s_prop->GetHeapValue());
+  const v8::HeapGraphNode* n_prop =
+      GetProperty(obj, v8::HeapGraphEdge::kProperty, "n_prop");
+  v8::Local<v8::Number> js_n_prop =
+      js_obj->Get(v8_str("n_prop")).As<v8::Number>();
+  CHECK(js_n_prop == n_prop->GetHeapValue());
+}
+
+
+TEST(GetHeapValueForDeletedObject) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  // It is impossible to delete a global property, so we are about to delete a
+  // property of the "a" object. Also, the "p" object can't be an empty one
+  // because the empty object is static and isn't actually deleted.
+  CompileRun("a = { p: { r: {} } };");
+  const v8::HeapSnapshot* snapshot =
+      v8::HeapProfiler::TakeSnapshot(v8_str("snapshot"));
+  const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
+  const v8::HeapGraphNode* obj = GetProperty(
+      global, v8::HeapGraphEdge::kShortcut, "a");
+  const v8::HeapGraphNode* prop = GetProperty(
+      obj, v8::HeapGraphEdge::kProperty, "p");
+  {
+    // Perform the check inside a nested local scope to avoid creating a
+    // reference to the object we are deleting.
+    v8::HandleScope scope;
+    CHECK(prop->GetHeapValue()->IsObject());
+  }
+  CompileRun("delete a.p;");
+  CHECK(prop->GetHeapValue()->IsUndefined());
+}
+
+
 static int StringCmp(const char* ref, i::String* act) {
   i::SmartArrayPointer<char> s_act = act->ToCString();
   int result = strcmp(ref, *s_act);
   if (result != 0)
     fprintf(stderr, "Expected: \"%s\", Actual: \"%s\"\n", ref, *s_act);
   return result;
 }
 
 
 TEST(GetConstructorName) {
@@ skipping 34 matching lines @@
       "Constructor4", i::V8HeapExplorer::GetConstructorName(*js_obj4)));
   v8::Local<v8::Object> obj5 = js_global->Get(v8_str("obj5")).As<v8::Object>();
   i::Handle<i::JSObject> js_obj5 = v8::Utils::OpenHandle(*obj5);
   CHECK_EQ(0, StringCmp(
       "Object", i::V8HeapExplorer::GetConstructorName(*js_obj5)));
   v8::Local<v8::Object> obj6 = js_global->Get(v8_str("obj6")).As<v8::Object>();
   i::Handle<i::JSObject> js_obj6 = v8::Utils::OpenHandle(*obj6);
   CHECK_EQ(0, StringCmp(
       "Object", i::V8HeapExplorer::GetConstructorName(*js_obj6)));
 }