Support use of third party time function to profiler

third_party/tcmalloc/chromium/src/thread_cache.h

 // Copyright (c) 2008, Google Inc.
 // 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
@@ skipping 78 matching lines @@
 
   void Scavenge();
   void Print(TCMalloc_Printer* out) const;
 
   int GetSamplePeriod();
 
   // Record allocation of "k" bytes.  Return true iff allocation
   // should be sampled
   bool SampleAllocation(size_t k);
 
+  // Record additional bytes allocated.
+  void AddToByteAllocatedTotal(size_t k) { total_bytes_allocated_ += k; }
+
+  // Return the total number of bytes allocated from this heap.  The value will
+  // wrap when there is an overflow, and so only the differences between two
+  // values should be relied on (and even then, modulo 2^32).
+  uint32 GetTotalBytesAllocated() const;
+
+  // On the current thread, return GetTotalBytesAllocated().
+  static uint32 GetBytesAllocatedOnCurrentThread();
+
   static void         InitModule();
   static void         InitTSD();
   static ThreadCache* GetThreadHeap();
   static ThreadCache* GetCache();
   static ThreadCache* GetCacheIfPresent();
   static ThreadCache* CreateCacheIfNecessary();
   static void         BecomeIdle();
 
   // Return the number of thread heaps in use.
   static inline int HeapsInUse();
@@ skipping 175 matching lines @@
   // Represents overall_thread_cache_size_ minus the sum of max_size_
   // across all ThreadCaches.  Protected by Static::pageheap_lock.
   static ssize_t unclaimed_cache_space_;
 
   // This class is laid out with the most frequently used fields
   // first so that hot elements are placed on the same cache line.
 
   size_t        size_;                  // Combined size of data
   size_t        max_size_;              // size_ > max_size_ --> Scavenge()
 
+  // Chromium profiling.

[willchan no longer on Chromium, 2012/02/15 01:29:56]

You should comment more what this is. In particular, I see that you are counting
the real bytes allocated (including rounding to size class), not the
user-requested bytes allocated.

[jar (doing other things), 2012/02/15 02:05:08]

Done.

+  uint32        total_bytes_allocated_;  // Total, modulo 2^32.
+
   // We sample allocations, biased by the size of the allocation
   Sampler       sampler_;               // A sampler
 
   FreeList      list_[kNumClasses];     // Array indexed by size-class
 
   pthread_t     tid_;                   // Which thread owns it
   bool          in_setspecific_;        // In call to pthread_setspecific?
 
   // Allocate a new heap. REQUIRES: Static::pageheap_lock is held.
   static ThreadCache* NewHeap(pthread_t tid);
@@ skipping 16 matching lines @@
 extern PageHeapAllocator<ThreadCache> threadcache_allocator;
 
 inline int ThreadCache::HeapsInUse() {
   return threadcache_allocator.inuse();
 }
 
 inline bool ThreadCache::SampleAllocation(size_t k) {
   return sampler_.SampleAllocation(k);
 }
 
+inline uint32 ThreadCache::GetTotalBytesAllocated() const {
+  return total_bytes_allocated_;
+}
+
 inline void* ThreadCache::Allocate(size_t size, size_t cl) {
   ASSERT(size <= kMaxSize);
   ASSERT(size == Static::sizemap()->ByteSizeForClass(cl));
 
   FreeList* list = &list_[cl];
   if (list->empty()) {
     return FetchFromCentralCache(cl, size);
   }
   size_ -= size;
   return list->Pop();
@@ skipping 43 matching lines @@
 // because we may be in the thread destruction code and may have
 // already cleaned up the cache for this thread.
 inline ThreadCache* ThreadCache::GetCacheIfPresent() {
   if (!tsd_inited_) return NULL;
   return GetThreadHeap();
 }
 
 }  // namespace tcmalloc
 
 #endif  // TCMALLOC_THREAD_CACHE_H_