Adds support for collecting statistics about code and its metadata.

src/objects.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 13475 matching lines @@
   switch (kind) {
 #define CASE(name) case name: return #name;
     CODE_KIND_LIST(CASE)
 #undef CASE
     case NUMBER_OF_KINDS: break;
   }
   UNREACHABLE();
   return NULL;
 }
 
+// Identify kind of code.
+const char* AbstractCode::Kind2String(Kind kind) {
+  if (kind < AbstractCode::INTERPRETED_FUNCTION)
+    return Code::Kind2String((Code::Kind)kind);
+  if (kind == AbstractCode::INTERPRETED_FUNCTION) return "INTERPRETED_FUNCTION";
+  UNREACHABLE();
+  return NULL;
+}
 
 Handle<WeakCell> Code::WeakCellFor(Handle<Code> code) {
   DCHECK(code->kind() == OPTIMIZED_FUNCTION);
   WeakCell* raw_cell = code->CachedWeakCell();
   if (raw_cell != NULL) return Handle<WeakCell>(raw_cell);
   Handle<WeakCell> cell = code->GetIsolate()->factory()->NewWeakCell(code);
   DeoptimizationInputData::cast(code->deoptimization_data())
       ->SetWeakCellCache(*cell);
   return cell;
 }
@@ skipping 4863 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8