Fix step in positions (include various calls and exclude current pc point), add a test

src/execution.cc

 // Copyright 2012 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 188 matching lines @@
                                   bool* caught_exception) {
   // Enter a try-block while executing the JavaScript code. To avoid
   // duplicate error printing it must be non-verbose.  Also, to avoid
   // creating message objects during stack overflow we shouldn't
   // capture messages.
   v8::TryCatch catcher;
   catcher.SetVerbose(false);
   catcher.SetCaptureMessage(false);
   *caught_exception = false;
 
+  // Get isolate now, because handle might be persistent
+  // and get destroyed in the next call.
+  Isolate* isolate = func->GetIsolate();
   Handle<Object> result = Invoke(false, func, receiver, argc, args,
                                  caught_exception);
 
-  Isolate* isolate = func->GetIsolate();
   if (*caught_exception) {
     ASSERT(catcher.HasCaught());
     ASSERT(isolate->has_pending_exception());
     ASSERT(isolate->external_caught_exception());
     if (isolate->is_out_of_memory() && !isolate->ignore_out_of_memory()) {
       V8::FatalProcessOutOfMemory("OOM during Execution::TryCall");
     }
     if (isolate->pending_exception() ==
         isolate->heap()->termination_exception()) {
       result = isolate->factory()->termination_exception();
@@ skipping 700 matching lines @@
   }
   if (stack_guard->IsFullDeopt()) {
     stack_guard->Continue(FULL_DEOPT);
     Deoptimizer::DeoptimizeAll(isolate);
   }
   return isolate->heap()->undefined_value();
 }
 
 
 } }  // namespace v8::internal