Hook memory tracing into Windows heap shim.

base/trace_event/malloc_dump_provider.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/trace_event/malloc_dump_provider.h"
 
 #include <stddef.h>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/allocator/allocator_shim.h"
@@ skipping 110 matching lines @@
   malloc_zone_statistics(nullptr, &stats);
   total_virtual_size = stats.size_allocated;
   allocated_objects_size = stats.size_in_use;
 
   // The resident size is approximated to the max size in use, which would count
   // the total size of all regions other than the free bytes at the end of each
   // region. In each allocation region the allocations are rounded off to a
   // fixed quantum, so the excess region will not be resident.
   // See crrev.com/1531463004 for detailed explanation.
   resident_size = stats.max_size_in_use;
+#elif defined(OS_WIN)
+  // TODO(siggi): DO NOT SUBMIT
+  // Walk the Windows heap backing the CRT allocation pool as is done in
+  // winheap_dump_provider_win.cc or ideally share the code.
 #else
   struct mallinfo info = mallinfo();
   DCHECK_GE(info.arena + info.hblkhd, info.uordblks);
 
   // In case of Android's jemalloc |arena| is 0 and the outer pages size is
   // reported by |hblkhd|. In case of dlmalloc the total is given by
   // |arena| + |hblkhd|. For more details see link: http://goo.gl/fMR8lF.
   total_virtual_size = info.arena + info.hblkhd;
   resident_size = info.uordblks;
   allocated_objects_size = info.uordblks;
@@ skipping 107 matching lines @@
       tid_dumping_heap_ == PlatformThread::CurrentId())
     return;
   AutoLock lock(allocation_register_lock_);
   if (!allocation_register_)
     return;
   allocation_register_->Remove(address);
 }
 
 }  // namespace trace_event
 }  // namespace base