Add code age subtype tracking to --track-gc-object-stats

src/heap.h

 // Copyright 2012 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 1792 matching lines @@
     return amount_of_external_allocated_memory_;
   }
 
   // ObjectStats are kept in two arrays, counts and sizes. Related stats are
   // stored in a contiguous linear buffer. Stats groups are stored one after
   // another.
   enum {
     FIRST_CODE_KIND_SUB_TYPE = LAST_TYPE + 1,
     FIRST_FIXED_ARRAY_SUB_TYPE =
         FIRST_CODE_KIND_SUB_TYPE + Code::NUMBER_OF_KINDS,
-    OBJECT_STATS_COUNT =
-        FIRST_FIXED_ARRAY_SUB_TYPE + LAST_FIXED_ARRAY_SUB_TYPE + 1
+    FIRST_CODE_AGE_SUB_TYPE =
+        FIRST_FIXED_ARRAY_SUB_TYPE + LAST_FIXED_ARRAY_SUB_TYPE + 1,
+    OBJECT_STATS_COUNT = FIRST_CODE_AGE_SUB_TYPE + Code::kLastCodeAge + 1
   };
 
-  void RecordObjectStats(InstanceType type, int sub_type, size_t size) {
+  void RecordObjectStats(InstanceType type, size_t size) {
     ASSERT(type <= LAST_TYPE);
-    if (sub_type < 0) {
-      object_counts_[type]++;
-      object_sizes_[type] += size;
-    } else {
-      if (type == CODE_TYPE) {
-        ASSERT(sub_type < Code::NUMBER_OF_KINDS);
-        object_counts_[FIRST_CODE_KIND_SUB_TYPE + sub_type]++;
-        object_sizes_[FIRST_CODE_KIND_SUB_TYPE + sub_type] += size;
-      } else if (type == FIXED_ARRAY_TYPE) {
-        ASSERT(sub_type <= LAST_FIXED_ARRAY_SUB_TYPE);
-        object_counts_[FIRST_FIXED_ARRAY_SUB_TYPE + sub_type]++;
-        object_sizes_[FIRST_FIXED_ARRAY_SUB_TYPE + sub_type] += size;
-      }
-    }
+    object_counts_[type]++;
+    object_sizes_[type] += size;
+  }
+
+  void RecordCodeSubTypeStats(int code_sub_type, int code_age, size_t size) {
+    ASSERT(code_sub_type < Code::NUMBER_OF_KINDS);
+    ASSERT(code_age < Code::kLastCodeAge);
+    object_counts_[FIRST_CODE_KIND_SUB_TYPE + code_sub_type]++;
+    object_sizes_[FIRST_CODE_KIND_SUB_TYPE + code_sub_type] += size;
+    object_counts_[FIRST_CODE_AGE_SUB_TYPE + code_age]++;
+    object_sizes_[FIRST_CODE_AGE_SUB_TYPE + code_age] += size;
+  }
+
+  void RecordFixedArraySubTypeStats(int array_sub_type, size_t size) {
+    ASSERT(array_sub_type <= LAST_FIXED_ARRAY_SUB_TYPE);
+    object_counts_[FIRST_FIXED_ARRAY_SUB_TYPE + array_sub_type]++;
+    object_sizes_[FIRST_FIXED_ARRAY_SUB_TYPE + array_sub_type] += size;
   }
 
   void CheckpointObjectStats();
 
   // We don't use a LockGuard here since we want to lock the heap
   // only when FLAG_concurrent_recompilation is true.
   class RelocationLock {
    public:
     explicit RelocationLock(Heap* heap);
 
@@ skipping 1235 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_