Revert 41938 - Merged third_party/tcmalloc/vendor/src(googleperftools r87) in...

third_party/tcmalloc/chromium/src/windows/port.cc

 /* 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
@@ skipping 165 matching lines @@
     destr_fn_info.destr_fn = destr_fn;
     destr_fn_info.key_for_destr_fn_arg = key;
   }
   return key;
 }
 
 
 // -----------------------------------------------------------------------
 // These functions replace system-alloc.cc
 
+static SpinLock alloc_lock(SpinLock::LINKER_INITIALIZED);
+
 // This is mostly like MmapSysAllocator::Alloc, except it does these weird
 // munmap's in the middle of the page, which is forbidden in windows.
 extern void* TCMalloc_SystemAlloc(size_t size, size_t *actual_size,
                                   size_t alignment) {
+  SpinLockHolder sh(&alloc_lock);
   // Align on the pagesize boundary
   const int pagesize = getpagesize();
   if (alignment < pagesize) alignment = pagesize;
   size = ((size + alignment - 1) / alignment) * alignment;
 
   // Report the total number of bytes the OS actually delivered.  This might be
   // greater than |size| because of alignment concerns.  The full size is
   // necessary so that adjacent spans can be coalesced.
   // TODO(antonm): proper processing of alignments
   // in actual_size and decommitting.
@@ skipping 90 matching lines @@
       if ((strlen(fname) >= prefix_length) &&
           (memcmp(fname, prefix, prefix_length) == 0)) {
         RAW_VLOG(0, "Removing old heap profile %s\n", fname);
         // TODO(csilvers): we really need to unlink dirname + fname
         _unlink(fname);
       }
     } while (FindNextFileA(hFind, &found) != FALSE);  // A is for Ansi
     FindClose(hFind);
   }
 }