Adapt Danno's Track Allocation Info idea to fast literals. When allocating a literal array,

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 9a1a58ef82a91415cbc6719a2632f04a0ea9f3ae..1582997bf4897036d3358a9c3adec13b8feb5c79 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -1002,6 +1002,33 @@ void TypeSwitchInfo::TypeSwitchInfoPrint(FILE* out) {
 }
 
 
+void AllocationSiteInfo::AllocationSiteInfoPrint(FILE* out) {
+  HeapObject::PrintHeader(out, "AllocationSiteInfo");
+  PrintF(out, " - payload: ");
+  if (payload()->IsJSGlobalPropertyCell()) {
+    JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(payload());

[danno, 2012/12/26 10:32:01]

You can remove this case until we support allocation infos for new Array(), this
part of the if is unused for the array literal allocation info tracking. 

[mvstanton, 2013/01/03 14:40:43]

Done.

+    Object* cell_contents = cell->value();
+    if (cell_contents->IsSmi()) {
+      ElementsKind kind = static_cast<ElementsKind>(
+          Smi::cast(cell_contents)->value());
+      PrintF(out, "Array allocation with ElementsKind ");
+      PrintElementsKind(out, kind);
+      PrintF(out, "\n");
+      return;
+    }
+  } else if (payload()->IsJSArray()) {
+    PrintF(out, "Array literal boilerplate ");
+    payload()->ShortPrint(out);
+    PrintF(out, "\n");
+    return;
+  }
+
+  PrintF(out, "unknown payload ");
+  payload()->ShortPrint(out);
+  PrintF(out, "\n");
+}
+
+
 void Script::ScriptPrint(FILE* out) {
   HeapObject::PrintHeader(out, "Script");
   PrintF(out, "\n - source: ");