Added zone tracing

src/zone/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 "src/zone/zone.h"
 
 #include <cstring>
 
 #include "src/v8.h"
 
@@ skipping 23 matching lines @@
     USE(start);                                  \
     USE(size);                                   \
   } while (false)
 
 const size_t kASanRedzoneBytes = 0;
 
 #endif  // V8_USE_ADDRESS_SANITIZER
 
 }  // namespace
 
-Zone::Zone(AccountingAllocator* allocator)
+Zone::Zone(AccountingAllocator* allocator, const char* name)
     : allocation_size_(0),
       segment_bytes_allocated_(0),
       position_(0),
       limit_(0),
       allocator_(allocator),
-      segment_head_(nullptr) {}
+      segment_head_(nullptr),
+      name_(name) {
+  allocator_->ZoneCreation(this);
+}
 
 Zone::~Zone() {
+  allocator_->ZoneDestruction(this);
+
   DeleteAll();
 
   DCHECK(segment_bytes_allocated_ == 0);
 }
 
 void* Zone::New(size_t size) {
   // Round up the requested size to fit the alignment.
   size = RoundUp(size, kAlignment);
 
   // If the allocation size is divisible by 8 then we return an 8-byte aligned
@@ skipping 111 matching lines @@
   // size bytes + header and alignment padding)
   DCHECK(reinterpret_cast<uintptr_t>(position_) >=
          reinterpret_cast<uintptr_t>(result));
   limit_ = segment->end();
   DCHECK(position_ <= limit_);
   return result;
 }
 
 }  // namespace internal
 }  // namespace v8