[turbofan] add ZonePool to correctly track compiler phase memory usage

src/zone.cc

 // Copyright 2012 the V8 project 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 <string.h>
 
 #include "src/v8.h"
 #include "src/zone-inl.h"
 
 namespace v8 {
@@ skipping 132 matching lines @@
     // Un-poison so we can re-use the segment later.
     ASAN_UNPOISON_MEMORY_REGION(start, keep->capacity());
 #ifdef DEBUG
     // Zap the contents of the kept segment (but not the header).
     memset(start, kZapDeadByte, keep->capacity());
 #endif
   } else {
     position_ = limit_ = 0;
   }
 
+  allocation_size_ = 0;
   // Update the head segment to be the kept segment (if any).
   segment_head_ = keep;
 }
 
 
 void Zone::DeleteKeptSegment() {
 #ifdef DEBUG
   // Constant byte value used for zapping dead memory in debug mode.
   static const unsigned char kZapDeadByte = 0xcd;
 #endif
@@ skipping 87 matching lines @@
     V8::FatalProcessOutOfMemory("Zone");
     return NULL;
   }
   limit_ = segment->end();
   DCHECK(position_ <= limit_);
   return result;
 }
 
 
 } }  // namespace v8::internal