Track peak Zone memory usage and report it via HeapStatistics

src/api.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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 5601 matching lines @@
 }
 
 HeapStatistics::HeapStatistics()
     : total_heap_size_(0),
       total_heap_size_executable_(0),
       total_physical_size_(0),
       total_available_size_(0),
       used_heap_size_(0),
       heap_size_limit_(0),
       malloced_memory_(0),
+      peak_malloced_memory_(0),
       does_zap_garbage_(0) {}
 
 HeapSpaceStatistics::HeapSpaceStatistics(): space_name_(0),
                                             space_size_(0),
                                             space_used_size_(0),
                                             space_available_size_(0),
                                             physical_space_size_(0) { }
 
 
 HeapObjectStatistics::HeapObjectStatistics()
@@ skipping 1958 matching lines @@
   i::Heap* heap = isolate->heap();
   heap_statistics->total_heap_size_ = heap->CommittedMemory();
   heap_statistics->total_heap_size_executable_ =
       heap->CommittedMemoryExecutable();
   heap_statistics->total_physical_size_ = heap->CommittedPhysicalMemory();
   heap_statistics->total_available_size_ = heap->Available();
   heap_statistics->used_heap_size_ = heap->SizeOfObjects();
   heap_statistics->heap_size_limit_ = heap->MaxReserved();
   heap_statistics->malloced_memory_ =
       isolate->allocator()->GetCurrentMemoryUsage();
+  heap_statistics->peak_malloced_memory_ =
+      isolate->allocator()->GetMaxMemoryUsage();
   heap_statistics->does_zap_garbage_ = heap->ShouldZapGarbage();
 }
 
 
 size_t Isolate::NumberOfHeapSpaces() {
   return i::LAST_SPACE - i::FIRST_SPACE + 1;
 }
 
 
 bool Isolate::GetHeapSpaceStatistics(HeapSpaceStatistics* space_statistics,
@@ skipping 1431 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8