Fix issue 571: display descriptive names for code objects from snapshot.

tools/tickprocessor.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 35 matching lines @@
   try {
     return read(fileName);
   } catch (e) {
     print(fileName + ': ' + (e.message || e));
     throw e;
   }
 }
 
 
 function inherits(childCtor, parentCtor) {
-  function tempCtor() {};
-  tempCtor.prototype = parentCtor.prototype;
-  childCtor.prototype = new tempCtor();
+  childCtor.prototype.__proto__ = parentCtor.prototype;
+};
+
+
+function SnapshotLogProcessor() {
+  devtools.profiler.LogReader.call(this, {
+      'code-creation': {
+          parsers: [null, this.createAddressParser('code'), parseInt, null],
+          processor: this.processCodeCreation, backrefs: true },
+      'code-move': { parsers: [this.createAddressParser('code'),
+          this.createAddressParser('code-move-to')],
+          processor: this.processCodeMove, backrefs: true },
+      'code-delete': { parsers: [this.createAddressParser('code')],
+          processor: this.processCodeDelete, backrefs: true },
+      'snapshot-pos': { parsers: [this.createAddressParser('code'), parseInt],
+          processor: this.processSnapshotPosition, backrefs: true }});
+
+  Profile.prototype.handleUnknownCode = function(operation, addr) {
+    var op = devtools.profiler.Profile.Operation;
+    switch (operation) {
+      case op.MOVE:
+        print('Snapshot: Code move event for unknown code: 0x' +
+              addr.toString(16));
+        break;
+      case op.DELETE:
+        print('Snapshot: Code delete event for unknown code: 0x' +
+              addr.toString(16));
+        break;
+    }
+  };
+
+  this.profile_ = new Profile();
+  this.serializedEntries_ = [];
+}
+inherits(SnapshotLogProcessor, devtools.profiler.LogReader);
+
+
+SnapshotLogProcessor.prototype.processCodeCreation = function(
+    type, start, size, name) {
+  var entry = this.profile_.addCode(
+      this.expandAlias(type), name, start, size);
+};
+
+
+SnapshotLogProcessor.prototype.processCodeMove = function(from, to) {
+  this.profile_.moveCode(from, to);
+};
+
+
+SnapshotLogProcessor.prototype.processCodeDelete = function(start) {
+  this.profile_.deleteCode(start);
+};
+
+
+SnapshotLogProcessor.prototype.processSnapshotPosition = function(addr, pos) {
+  this.serializedEntries_[pos] = this.profile_.findEntry(addr);
+};
+
+
+SnapshotLogProcessor.prototype.processLogFile = function(fileName) {
+  var contents = readFile(fileName);
+  this.processLogChunk(contents);
+};
+
+
+SnapshotLogProcessor.prototype.getSerializedEntryName = function(pos) {
+  var entry = this.serializedEntries_[pos];
+  return entry ? entry.getRawName() : null;
 };
 
 
 function TickProcessor(
-    cppEntriesProvider, separateIc, ignoreUnknown, stateFilter) {
+    cppEntriesProvider, separateIc, ignoreUnknown, stateFilter, snapshotLogProcessor) {
   devtools.profiler.LogReader.call(this, {
       'shared-library': { parsers: [null, parseInt, parseInt],
           processor: this.processSharedLibrary },
       'code-creation': {
           parsers: [null, this.createAddressParser('code'), parseInt, null],
           processor: this.processCodeCreation, backrefs: true },
       'code-move': { parsers: [this.createAddressParser('code'),
           this.createAddressParser('code-move-to')],
           processor: this.processCodeMove, backrefs: true },
       'code-delete': { parsers: [this.createAddressParser('code')],
           processor: this.processCodeDelete, backrefs: true },
+      'snapshot-pos': { parsers: [this.createAddressParser('code'), parseInt],
+          processor: this.processSnapshotPosition, backrefs: true },
       'tick': { parsers: [this.createAddressParser('code'),
           this.createAddressParser('stack'), parseInt, 'var-args'],
           processor: this.processTick, backrefs: true },
       'heap-sample-begin': { parsers: [null, null, parseInt],
           processor: this.processHeapSampleBegin },
       'heap-sample-end': { parsers: [null, null],
           processor: this.processHeapSampleEnd },
       'heap-js-prod-item': { parsers: [null, 'var-args'],
           processor: this.processJSProducer, backrefs: true },
       // Ignored events.
       'profiler': null,
       'heap-sample-stats': null,
       'heap-sample-item': null,
       'heap-js-cons-item': null,
       'heap-js-ret-item': null,
       // Obsolete row types.
       'code-allocate': null,
       'begin-code-region': null,
       'end-code-region': null });
 
   this.cppEntriesProvider_ = cppEntriesProvider;
   this.ignoreUnknown_ = ignoreUnknown;
   this.stateFilter_ = stateFilter;
+  this.snapshotLogProcessor_ = snapshotLogProcessor;
+  this.deserializedEntriesNames_ = [];
   var ticks = this.ticks_ =
     { total: 0, unaccounted: 0, excluded: 0, gc: 0 };
 
   Profile.prototype.handleUnknownCode = function(
       operation, addr, opt_stackPos) {
     var op = devtools.profiler.Profile.Operation;
     switch (operation) {
       case op.MOVE:
         print('Code move event for unknown code: 0x' + addr.toString(16));
         break;
@@ skipping 87 matching lines @@
   var libFuncs = this.cppEntriesProvider_.parseVmSymbols(
       name, startAddr, endAddr, function(fName, fStart, fEnd) {
     self.profile_.addStaticCode(fName, fStart, fEnd);
     self.setCodeType(fName, 'CPP');
   });
 };
 
 
 TickProcessor.prototype.processCodeCreation = function(
     type, start, size, name) {
+  name = this.deserializedEntriesNames_[start] || name;
   var entry = this.profile_.addCode(
       this.expandAlias(type), name, start, size);
 };
 
 
 TickProcessor.prototype.processCodeMove = function(from, to) {
   this.profile_.moveCode(from, to);
 };
 
 
 TickProcessor.prototype.processCodeDelete = function(start) {
   this.profile_.deleteCode(start);
 };
 
 
+TickProcessor.prototype.processSnapshotPosition = function(addr, pos) {
+  if (this.snapshotLogProcessor_) {
+    this.deserializedEntriesNames_[addr] =
+      this.snapshotLogProcessor_.getSerializedEntryName(pos);
+  }
+};
+
+
 TickProcessor.prototype.includeTick = function(vmState) {
   return this.stateFilter_ == null || this.stateFilter_ == vmState;
 };
 
 
 TickProcessor.prototype.processTick = function(pc, sp, vmState, stack) {
   this.ticks_.total++;
   if (vmState == TickProcessor.VmStates.GC) this.ticks_.gc++;
   if (!this.includeTick(vmState)) {
     this.ticks_.excluded++;
@@ skipping 411 matching lines @@
         'Exclude ticks of unknown code entries from processing'],
     '--separate-ic': ['separateIc', true,
         'Separate IC entries'],
     '--unix': ['platform', 'unix',
         'Specify that we are running on *nix platform'],
     '--windows': ['platform', 'windows',
         'Specify that we are running on Windows platform'],
     '--mac': ['platform', 'mac',
         'Specify that we are running on Mac OS X platform'],
     '--nm': ['nm', 'nm',
-        'Specify the \'nm\' executable to use (e.g. --nm=/my_dir/nm)']
+        'Specify the \'nm\' executable to use (e.g. --nm=/my_dir/nm)'],
+    '--snapshot-log': ['snapshotLogFileName', 'snapshot.log',
+        'Specify snapshot log file to use (e.g. --snapshot-log=snapshot.log)']
   };
   this.argsDispatch_['--js'] = this.argsDispatch_['-j'];
   this.argsDispatch_['--gc'] = this.argsDispatch_['-g'];
   this.argsDispatch_['--compiler'] = this.argsDispatch_['-c'];
   this.argsDispatch_['--other'] = this.argsDispatch_['-o'];
   this.argsDispatch_['--external'] = this.argsDispatch_['-e'];
 };
 
 
 ArgumentsProcessor.DEFAULTS = {
   logFileName: 'v8.log',
+  snapshotLogFileName: null,
   platform: 'unix',
   stateFilter: null,
   ignoreUnknown: false,
   separateIc: false,
   nm: 'nm'
 };
 
 
 ArgumentsProcessor.prototype.parse = function() {
   while (this.args_.length) {
@@ skipping 49 matching lines @@
       if (arg !== synArg && dispatch === this.argsDispatch_[synArg]) {
         synonims.push(synArg);
         delete this.argsDispatch_[synArg];
       }
     }
     print('  ' + padRight(synonims.join(', '), 20) + dispatch[2]);
   }
   quit(2);
 };