[NOT TO COMMIT!] r109: Diff of the current tcmalloc from the original google-perftools r109.

third_party/tcmalloc/chromium/src/google/tcmalloc.h

-// Copyright (c) 2009, Google Inc.
+// Copyright (c) 2007, 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
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // ---
-// Author: Andrew Fikes
+// Author: Craig Silverstein <opensource@google.com>
 //
-// Utility class for coalescing sampled stack traces.  Not thread-safe.
-
-#ifndef TCMALLOC_STACK_TRACE_TABLE_H_
-#define TCMALLOC_STACK_TRACE_TABLE_H_
+// Some obscure memory-allocation routines may not be declared on all
+// systems.  In those cases, we'll just declare them ourselves.
+// This file is meant to be used only internally, for unittests.
 
 #include <config.h>
-#include <stdint.h>                     // for uintptr_t
-#include "common.h"
 
-namespace tcmalloc {
+#ifndef _XOPEN_SOURCE
+# define _XOPEN_SOURCE 600  // for posix_memalign
+#endif
+#include <stdlib.h>         // for posix_memalign
+// FreeBSD has malloc.h, but complains if you use it
+#if defined(HAVE_MALLOC_H) && !defined(__FreeBSD__)
+#include <malloc.h>         // for memalign, valloc, pvalloc
+#endif
 
-class PERFTOOLS_DLL_DECL StackTraceTable {
- public:
-  // REQUIRES: L < pageheap_lock
-  StackTraceTable();
-  ~StackTraceTable();
+// __THROW is defined in glibc systems.  It means, counter-intuitively,
+// "This function will never throw an exception."  It's an optional
+// optimization tool, but we may need to use it to match glibc prototypes.
+#ifndef __THROW    // I guess we're not on a glibc system
+# define __THROW   // __THROW is just an optimization, so ok to make it ""
+#endif
 
-  // Adds stack trace "t" to table.
-  //
-  // REQUIRES: L >= pageheap_lock
-  void AddTrace(const StackTrace& t);
-
-  // Returns stack traces formatted per MallocExtension guidelines.
-  // May return NULL on error.  Clears state before returning.
-  //
-  // REQUIRES: L < pageheap_lock
-  void** ReadStackTracesAndClear();
-
-  // Exposed for PageHeapAllocator
-  struct Bucket {
-    // Key
-    uintptr_t hash;
-    StackTrace trace;
-
-    // Payload
-    int count;
-    Bucket* next;
-
-    bool KeyEqual(uintptr_t h, const StackTrace& t) const;
-  };
-
-  // For testing
-  int depth_total() const { return depth_total_; }
-  int bucket_total() const { return bucket_total_; }
-
- private:
-  static const int kHashTableSize = 1 << 14; // => table_ is 128k
-
-  bool error_;
-  int depth_total_;
-  int bucket_total_;
-  Bucket** table_;
-};
-
-}  // namespace tcmalloc
-
-#endif  // TCMALLOC_STACK_TRACE_TABLE_H_
+#if !HAVE_CFREE_SYMBOL
+extern "C" void cfree(void* ptr) __THROW;
+#endif
+#if !HAVE_POSIX_MEMALIGN_SYMBOL
+extern "C" int posix_memalign(void** ptr, size_t align, size_t size) __THROW;
+#endif
+#if !HAVE_MEMALIGN_SYMBOL
+extern "C" void* memalign(size_t __alignment, size_t __size) __THROW;
+#endif
+#if !HAVE_VALLOC_SYMBOL
+extern "C" void* valloc(size_t __size) __THROW;
+#endif
+#if !HAVE_PVALLOC_SYMBOL
+extern "C" void* pvalloc(size_t __size) __THROW;
+#endif