Fixed test memory leaks

src/log.cc

 // Copyright 2006-2008 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 389 matching lines @@
 
 //
 // Logger class implementation.
 //
 Ticker* Logger::ticker_ = NULL;
 char* Logger::message_buffer_ = NULL;
 FILE* Logger::logfile_ = NULL;
 Profiler* Logger::profiler_ = NULL;
 Mutex* Logger::mutex_ = NULL;
 VMState* Logger::current_state_ = NULL;
+VMState Logger::bottom_state_(OTHER);
 SlidingStateWindow* Logger::sliding_state_window_ = NULL;
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 void Logger::Preamble(const char* content) {
 #ifdef ENABLE_LOGGING_AND_PROFILING
   if (logfile_ == NULL || !FLAG_log_code) return;
   LogMessageBuilder msg;
   msg.Append("%s", content);
@@ skipping 590 matching lines @@
       }
       SmartPointer<const char> expanded = stream.ToCString();
       logfile_ = OS::FOpen(*expanded, "w");
     } else {
       logfile_ = OS::FOpen(FLAG_logfile, "w");
     }
     message_buffer_ = NewArray<char>(kMessageBufferSize);
     mutex_ = OS::CreateMutex();
   }
 
-  current_state_ = new VMState(OTHER);
+  current_state_ = &bottom_state_;
 
   // as log is initialized early with V8, we can assume that JS execution
   // frames can never reach this point on stack
   int stack_var;
   ticker_ = new Ticker(1, reinterpret_cast<unsigned int>(&stack_var));
 
   if (FLAG_sliding_state_window && sliding_state_window_ == NULL) {
     sliding_state_window_ = new SlidingStateWindow();
   }
 
@@ skipping 14 matching lines @@
 
 void Logger::TearDown() {
 #ifdef ENABLE_LOGGING_AND_PROFILING
   // Stop the profiler before closing the file.
   if (profiler_ != NULL) {
     profiler_->Disengage();
     delete profiler_;
     profiler_ = NULL;
   }
 
-  // Deleting the current_state_ has the side effect of assigning to it(!).
-  while (current_state_) delete current_state_;
   delete sliding_state_window_;
 
   delete ticker_;
 
   if (logfile_ != NULL) {
     fclose(logfile_);
     logfile_ = NULL;
     delete mutex_;
     mutex_ = NULL;
     DeleteArray(message_buffer_);
@@ skipping 88 matching lines @@
     } else {
       // Are we leaving V8?
       if (previous_->state_ == EXTERNAL) Heap::Protect();
     }
   }
 #endif
 }
 #endif
 
 } }  // namespace v8::internal