Update the tcmalloc vendor branch to r144 (gperftools 2.0), and README.chromium.

third_party/tcmalloc/vendor/src/page_heap.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 20 matching lines @@
 // Author: Sanjay Ghemawat <opensource@google.com>
 
 #ifndef TCMALLOC_PAGE_HEAP_H_
 #define TCMALLOC_PAGE_HEAP_H_
 
 #include <config.h>
 #include <stddef.h>                     // for size_t
 #ifdef HAVE_STDINT_H
 #include <stdint.h>                     // for uint64_t, int64_t, uint16_t
 #endif
-#include <google/malloc_extension.h>
+#include <gperftools/malloc_extension.h>
 #include "base/basictypes.h"
 #include "common.h"
 #include "packed-cache-inl.h"
 #include "pagemap.h"
 #include "span.h"
 
 // We need to dllexport PageHeap just for the unittest.  MSVC complains
 // that we don't dllexport the PageHeap members, but we don't need to
 // test those, so I just suppress this warning.
 #ifdef _MSC_VER
 #pragma warning(push)
 #pragma warning(disable:4251)
 #endif
 
 // This #ifdef should almost never be set.  Set NO_TCMALLOC_SAMPLES if
 // you're porting to a system where you really can't get a stacktrace.
 // Because we control the definition of GetStackTrace, all clients of
 // GetStackTrace should #include us rather than stacktrace.h.
 #ifdef NO_TCMALLOC_SAMPLES
   // We use #define so code compiles even if you #include stacktrace.h somehow.
 # define GetStackTrace(stack, depth, skip)  (0)
 #else
-# include <google/stacktrace.h>
+# include <gperftools/stacktrace.h>
 #endif
 
-class TCMalloc_Printer;
 namespace base {
 struct MallocRange;
 }
 
 namespace tcmalloc {
 
 // -------------------------------------------------------------------------
 // Map from page-id to per-page data
 // -------------------------------------------------------------------------
 
@@ skipping 52 matching lines @@
   // REQUIRES: span->location == IN_USE
   // REQUIRES: span->sizeclass == 0
   Span* Split(Span* span, Length n);
 
   // Return the descriptor for the specified page.  Returns NULL if
   // this PageID was not allocated previously.
   inline Span* GetDescriptor(PageID p) const {
     return reinterpret_cast<Span*>(pagemap_.get(p));
   }
 
-  // Dump state to stderr
-  void Dump(TCMalloc_Printer* out);
-
   // If this page heap is managing a range with starting page # >= start,
   // store info about the range in *r and return true.  Else return false.
   bool GetNextRange(PageID start, base::MallocRange* r);
 
   // Page heap statistics
   struct Stats {
     Stats() : system_bytes(0), free_bytes(0), unmapped_bytes(0) {}
     uint64_t system_bytes;    // Total bytes allocated from system
     uint64_t free_bytes;      // Total bytes on normal freelists
     uint64_t unmapped_bytes;  // Total bytes on returned freelists
   };
   inline Stats stats() const { return stats_; }
-  void GetClassSizes(int64 class_sizes_normal[kMaxPages],
-                     int64 class_sizes_returned[kMaxPages],
-                     int64* normal_pages_in_spans,
-                     int64* returned_pages_in_spans);
+
+  struct SmallSpanStats {
+    // For each free list of small spans, the length (in spans) of the
+    // normal and returned free lists for that size.
+    int64 normal_length[kMaxPages];
+    int64 returned_length[kMaxPages];
+  };
+  void GetSmallSpanStats(SmallSpanStats* result);
+
+  // Stats for free large spans (i.e., spans with more than kMaxPages pages).
+  struct LargeSpanStats {
+    int64 spans;           // Number of such spans
+    int64 normal_pages;    // Combined page length of normal large spans
+    int64 returned_pages;  // Combined page length of unmapped spans
+  };
+  void GetLargeSpanStats(LargeSpanStats* result);
 
   bool Check();
   // Like Check() but does some more comprehensive checking.
   bool CheckExpensive();
   bool CheckList(Span* list, Length min_pages, Length max_pages,
                  int freelist);  // ON_NORMAL_FREELIST or ON_RETURNED_FREELIST
 
   // Try to release at least num_pages for reuse by the OS.  Returns
   // the actual number of pages released, which may be less than
   // num_pages if there weren't enough pages to release. The result
@@ skipping 108 matching lines @@
   int release_index_;
 };
 
 }  // namespace tcmalloc
 
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif
 
 #endif  // TCMALLOC_PAGE_HEAP_H_