Merge google-perftools r109 (the current contents of third_party/tcmalloc/vendor)

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

 // Copyright (c) 2006, 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 324 matching lines @@
 
   // Our file format is "bucket, bucket, ..., bucket, proc_self_maps_info".
   // In the cases buf is too small, we'd rather leave out the last
   // buckets than leave out the /proc/self/maps info.  To ensure that,
   // we actually print the /proc/self/maps info first, then move it to
   // the end of the buffer, then write the bucket info into whatever
   // is remaining, and then move the maps info one last time to close
   // any gaps.  Whew!
   int map_length = snprintf(buf, size, "%s", kProcSelfMapsHeader);
   if (map_length < 0 || map_length >= size) return 0;
-  map_length += FillProcSelfMaps(buf + map_length, size - map_length);
+  bool dummy;   // "wrote_all" -- did /proc/self/maps fit in its entirety?
+  map_length += FillProcSelfMaps(buf + map_length, size - map_length, &dummy);
   RAW_DCHECK(map_length <= size, "");
   char* const map_start = buf + size - map_length;      // move to end
   memmove(map_start, buf, map_length);
   size -= map_length;
 
   Stats stats;
   memset(&stats, 0, sizeof(stats));
   int bucket_length = snprintf(buf, size, "%s", kProfileHeader);
   if (bucket_length < 0 || bucket_length >= size) return 0;
   bucket_length = UnparseBucket(total_, buf, bucket_length, size,
@@ skipping 235 matching lines @@
                                               char* unused) {
   // Perhaps also log the allocation stack trace (unsymbolized)
   // on this line in case somebody finds it useful.
   RAW_LOG(ERROR, "leaked %"PRIuS" byte object %p", v->bytes, ptr);
 }
 
 void HeapProfileTable::Snapshot::ReportIndividualObjects() {
   char unused;
   map_.Iterate(ReportObject, &unused);
 }