Dump type statistics of malloc'ed objects.

third_party/tcmalloc/chromium/src/heap-profile-table.h

Index: third_party/tcmalloc/chromium/src/heap-profile-table.h
diff --git a/third_party/tcmalloc/chromium/src/heap-profile-table.h b/third_party/tcmalloc/chromium/src/heap-profile-table.h
index 34697a0392b6a424a2d003be3882287dd07af7e0..cf22a20237afd2adca27eb090f6da69bac5ba374 100644
--- a/third_party/tcmalloc/chromium/src/heap-profile-table.h
+++ b/third_party/tcmalloc/chromium/src/heap-profile-table.h
@@ -39,6 +39,10 @@
 #include "base/basictypes.h"
 #include "base/logging.h"   // for RawFD
 
+#if defined(TYPE_PROFILING)
+#include <gperftools/type_profiler_map.h>
+#endif  // defined(TYPE_PROFILING)
+
 // Table to maintain a heap profile data inside,
 // i.e. the set of currently active heap memory allocations.
 // thread-unsafe and non-reentrant code:
@@ -238,6 +242,10 @@ class HeapProfileTable {
   // used for leak checking (using HeapLeakChecker).
   void DumpMarkedObjects(AllocationMark mark, const char* file_name);
 
+#if defined(TYPE_PROFILING)
+  void DumpTypeStatistics(const char* file_name) const;
+#endif  // defined(TYPE_PROFILING)
+
  private:
   friend class DeepHeapProfile;
 
@@ -321,6 +329,18 @@ class HeapProfileTable {
     MarkArgs(AllocationMark m, bool a) : mark(m), mark_all(a) { }
   };
 
+#if defined(TYPE_PROFILING)
+  struct TypeCount {
+    size_t bytes;
+    unsigned int objects;
+
+    TypeCount(size_t bytes_arg, unsigned int objects_arg)

[jar (doing other things), 2012/10/01 21:59:44]

nit: constructors are always listed first in structs / classes (or at least
ahead of members).... <sigh>.... but this file seems to not comply with that
style.... so I guess it can stay as is.

[Dai Mikurube (NOT FULLTIME), 2012/10/02 06:35:12]

Yeah, I thought that, but I followed the others in this file.

+        : bytes(bytes_arg),
+          objects(objects_arg) {
+    }
+  };
+#endif  // defined(TYPE_PROFILING)
+
   // helpers ----------------------------
 
   // Unparse bucket b and print its portion of profile dump into buf.
@@ -383,6 +403,16 @@ class HeapProfileTable {
   inline static void ZeroBucketCountsIterator(
       const void* ptr, AllocValue* v, HeapProfileTable* heap_profile);
 
+#if defined(TYPE_PROFILING)
+  inline static void CountUpTypeIterator(const void* ptr,
+                                         AllocValue* value,
+                                         AddressMap<TypeCount>* type_size_map);
+
+  inline static void DumpTypeIterator(const void* ptr,
+                                      TypeCount* size,
+                                      const DumpArgs& args);
+#endif  // defined(TYPE_PROFILING)
+
   // Helper for IterateOrderedAllocContexts and FillOrderedProfile.
   // Creates a sorted list of Buckets whose length is num_alloc_buckets_ +
   // num_avaliable_mmap_buckets_.