[Heap profiler] Add construction stack trace to heap object

test/cctest/test-heap-profiler.cc

 // Copyright 2011 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
@@ skipping 2488 matching lines @@
   const v8::HeapGraphNode* global_node = GetGlobalObject(snapshot);
   const v8::HeapGraphNode* box_node =
       GetProperty(global_node, v8::HeapGraphEdge::kElement, "0");
   CHECK_NE(NULL, box_node);
   v8::String::Utf8Value box_node_name(box_node->GetName());
   CHECK_EQ("system / Box", *box_node_name);
   const v8::HeapGraphNode* box_value =
       GetProperty(box_node, v8::HeapGraphEdge::kInternal, "value");
   CHECK_NE(NULL, box_value);
 }
+
+
+static inline i::Address ToAddress(int n) {
+  return reinterpret_cast<i::Address>(n);
+}
+
+
+TEST(AddressToTraceMap) {
+  i::AddressToTraceMap map;
+
+  CHECK_EQ(0, map.GetTraceNodeId(ToAddress(150)));
+
+  // [100, 200)
+  map.AddRange(ToAddress(100), 100, 1U);
+  CHECK_EQ(0, map.GetTraceNodeId(ToAddress(50)));
+  CHECK_EQ(1, map.GetTraceNodeId(ToAddress(100)));
+  CHECK_EQ(1, map.GetTraceNodeId(ToAddress(150)));
+  CHECK_EQ(0, map.GetTraceNodeId(ToAddress(100 + 100)));
+  CHECK_EQ(1, map.size());
+
+  // [100, 200), [200, 300)
+  map.AddRange(ToAddress(200), 100, 2U);
+  CHECK_EQ(2, map.GetTraceNodeId(ToAddress(250)));
+  CHECK_EQ(2, map.size());
+
+  // [100, 150), [150, 250), [250, 300)
+  map.AddRange(ToAddress(150), 100, 3U);
+  CHECK_EQ(1, map.GetTraceNodeId(ToAddress(149)));
+  CHECK_EQ(2, map.GetTraceNodeId(ToAddress(250)));
+  CHECK_EQ(3, map.GetTraceNodeId(ToAddress(150)));
+  CHECK_EQ(3, map.size());
+
+  // [100, 150), [150, 250), [250, 300), [400, 500)
+  map.AddRange(ToAddress(400), 100, 4U);
+  CHECK_EQ(1, map.GetTraceNodeId(ToAddress(149)));
+  CHECK_EQ(2, map.GetTraceNodeId(ToAddress(250)));
+  CHECK_EQ(3, map.GetTraceNodeId(ToAddress(150)));
+  CHECK_EQ(4, map.GetTraceNodeId(ToAddress(450)));
+  CHECK_EQ(0, map.GetTraceNodeId(ToAddress(500)));
+  CHECK_EQ(0, map.GetTraceNodeId(ToAddress(350)));
+  CHECK_EQ(4, map.size());
+
+  // [100, 150), [150, 200), [200, 600)
+  map.AddRange(ToAddress(200), 400, 5U);
+  CHECK_EQ(5, map.GetTraceNodeId(ToAddress(200)));
+  CHECK_EQ(5, map.GetTraceNodeId(ToAddress(400)));
+  CHECK_EQ(3, map.size());
+
+  // [100, 150), [150, 200), [200, 600)
+  map.AddRange(ToAddress(150), 50, 6U);
+  map.AddRange(ToAddress(150), 50, 7U);
+  CHECK_EQ(7, map.GetTraceNodeId(ToAddress(150)));
+  CHECK_EQ(5, map.GetTraceNodeId(ToAddress(200)));
+  CHECK_EQ(3, map.size());
+
+  map.Clear();
+  CHECK_EQ(0, map.size());
+  CHECK_EQ(0, map.GetTraceNodeId(ToAddress(400)));
+}