Fix 'nm' results parsing in tickprocessor.

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 361 matching lines @@
 
 CppEntriesProvider.prototype.parseVmSymbols = function(
     libName, libStart, libEnd, processorFunc) {
   this.loadSymbols(libName);
 
   var prevEntry;
 
   function addPrevEntry(end) {
     // Several functions can be mapped onto the same address. To avoid
     // creating zero-sized entries, skip such duplicates.
-    if (prevEntry && prevEntry.start < end) {
+    // Also double-check that function belongs to the library address space.
+    if (prevEntry && prevEntry.start < end &&
+        prevEntry.start >= libStart && end <= libEnd) {
       processorFunc(prevEntry.name, prevEntry.start, end);
     }
   }
 
   while (true) {
     var funcInfo = this.parseNextLine();
     if (funcInfo === null) {
       continue;
     } else if (funcInfo === false) {
       break;
@@ skipping 199 matching lines @@
 
 var params = processArguments(arguments);
 var tickProcessor = new TickProcessor(
     params.platform == 'unix' ? new UnixCppEntriesProvider() :
         new WindowsCppEntriesProvider(),
     params.separateIc,
     params.ignoreUnknown,
     params.stateFilter);
 tickProcessor.processLogFile(params.logFileName);
 tickProcessor.printStatistics();