Merge pull request #3811 from Unitech/memory_inspector

feature: add inspector for node 10 and heap snapshot

lib/Daemon.js

@@ -16,6 +16,7 @@ var fs           = require('fs');
 var God          = require('./God');
 var async        = require('async');
 var fmt          = require('./tools/fmt.js');
+var semver       = require('semver');
 
 var Daemon = module.exports = function(opts) {
   if (!opts) opts = {};
@@ -153,7 +154,7 @@ Daemon.prototype.innerStart = function(cb) {
   var profiler;
 
   try {
-    profiler = require('v8-profiler-node8');
+    profiler = semver.satisfies(process.version, '>= 10.0.0') ? require('inspector') : null;
   } catch(e) {
     profiler = null;
   }
@@ -163,18 +164,31 @@ Daemon.prototype.innerStart = function(cb) {
    */
   function snapshotPM2(msg, cb) {
     if (profiler == null) {
-      console.log('v8-profiler is not available');
-      return cb(new Error('v8-profiler is not available'));
+      console.log('Heap snapshot is not available (node 10+)');
+      return cb(new Error('Heap snapshot is not available (node 10+)'));
     }
 
-    var snapshot1 = profiler.takeSnapshot();
-    var path = require('path');
-    snapshot1.export(function(error, result) {
-      fs.writeFile(msg.pwd, result, function() {
-        snapshot1.delete();
+    const session = new profiler.Session()
+    session.connect()
+    session.post('HeapProfiler.enable')
+
+    const chunks = []
+    session.on('HeapProfiler.addHeapSnapshotChunk', (data) => {
+      chunks.push(data.params.chunk)
+    })
+
+    session.post('HeapProfiler.takeHeapSnapshot', {
+      reportProgress: false
+    }, (err, data) => {
+      if (err) return cb(err)
+
+      fs.writeFile(msg.pwd, chunks.join(''), function() {
+        session.post('Profiler.disable')
+        session.disconnect()
+
         return cb(null, {file : msg.pwd});
       });
-    });
+    })
   }
 
   function startProfilingPM2(msg, cb) {