1 // Copyright (c) 2014, StrongLoop Inc.
3 // Permission to use, copy, modify, and/or distribute this software for any
4 // purpose with or without fee is hereby granted, provided that the above
5 // copyright notice and this permission notice appear in all copies.
7 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
10 // ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12 // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
13 // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 const v8binding = process.binding('v8');
19 const heapStatisticsBuffer =
20 new Uint32Array(v8binding.heapStatisticsArrayBuffer);
22 const kTotalHeapSizeIndex = v8binding.kTotalHeapSizeIndex;
23 const kTotalHeapSizeExecutableIndex = v8binding.kTotalHeapSizeExecutableIndex;
24 const kTotalPhysicalSizeIndex = v8binding.kTotalPhysicalSizeIndex;
25 const kTotalAvailableSize = v8binding.kTotalAvailableSize;
26 const kUsedHeapSizeIndex = v8binding.kUsedHeapSizeIndex;
27 const kHeapSizeLimitIndex = v8binding.kHeapSizeLimitIndex;
29 exports.getHeapStatistics = function() {
30 const buffer = heapStatisticsBuffer;
32 v8binding.updateHeapStatisticsArrayBuffer();
35 'total_heap_size': buffer[kTotalHeapSizeIndex],
36 'total_heap_size_executable': buffer[kTotalHeapSizeExecutableIndex],
37 'total_physical_size': buffer[kTotalPhysicalSizeIndex],
38 'total_available_size': buffer[kTotalAvailableSize],
39 'used_heap_size': buffer[kUsedHeapSizeIndex],
40 'heap_size_limit': buffer[kHeapSizeLimitIndex]
44 exports.setFlagsFromString = v8binding.setFlagsFromString;