output: #fixed code
                               protected void init(Class<T> elementType, long objectCount, 
  			NonPrimitiveFieldAllocationConfigType allocateNonPrimitiveFieldsAtOffHeapConfigType, 
  			DirectMemoryService directMemoryService) {
  		super.init(elementType, allocateNonPrimitiveFieldsAtOffHeapConfigType, directMemoryService);
  		
  		if (elementType.isAnnotation()) {
  			throw new IllegalArgumentException("Annotation class " + "(" + elementType.getName() + ")" + 
  											   " is not supported !");
  		}
  		if (elementType.isInterface()) {
  			throw new IllegalArgumentException("Interface class " + "(" + elementType.getName() + ")" + 
  											   " is not supported !");
  		}
  		if (elementType.isAnonymousClass()) {
  			throw new IllegalArgumentException("Anonymous class " + "(" + elementType.getName() + ")" + 
  											   " is not supported !");
  		}
  		this.elementType = elementType;
  		this.objectCount = objectCount;
  		this.usedObjectCount = 0;
  		this.directMemoryService = directMemoryService;
  		
  		inUseBlockCount = objectCount;
  		inUseBlockAddress = directMemoryService.allocateMemory(inUseBlockCount);
  		sampleObject = JvmUtil.getSampleInstance(elementType);
  		if (sampleObject == null) {
  			throw new IllegalStateException("Unable to create a sample object for class " + elementType.getName());
  		}
  		sampleHeader = directMemoryService.getLong(sampleObject, 0L);
  		objectSize = directMemoryService.sizeOfObject(sampleObject);
  		offHeapSampleObjectAddress = directMemoryService.allocateMemory(objectSize);
  		directMemoryService.copyMemory(sampleObject, 0L, null, offHeapSampleObjectAddress, objectSize);
  		/*
  		for (int i = 0; i < objectSize; i += JvmUtil.LONG_SIZE) {
  			directMemoryService.putLong(offHeapSampleObjectAddress + i, directMemoryService.getLong(sampleObject, i));
  		}
  		*/
  		/*
  		for (int i = 0; i < objectSize; i++) {
  			directMemoryService.putByte(offHeapSampleObjectAddress + i, directMemoryService.getByte(sampleObject, i));
  		}
  		*/
  		// directMemoryService.copyMemory(directMemoryService.addressOf(sampleObject), offHeapSampleObjectAddress, objectSize);
  	}
input: #vulnerable code 
                               protected void init(Class<T> elementType, long objectCount, 
  			NonPrimitiveFieldAllocationConfigType allocateNonPrimitiveFieldsAtOffHeapConfigType, 
  			DirectMemoryService directMemoryService) {
  		super.init(elementType, allocateNonPrimitiveFieldsAtOffHeapConfigType, directMemoryService);
  		
  		if (elementType.isAnnotation()) {
  			throw new IllegalArgumentException("Annotation class " + "(" + elementType.getName() + ")" + 
  											   " is not supported !");
  		}
  		if (elementType.isInterface()) {
  			throw new IllegalArgumentException("Interface class " + "(" + elementType.getName() + ")" + 
  											   " is not supported !");
  		}
  		if (elementType.isAnonymousClass()) {
  			throw new IllegalArgumentException("Anonymous class " + "(" + elementType.getName() + ")" + 
  											   " is not supported !");
  		}
  		this.elementType = elementType;
  		this.objectCount = objectCount;
  		this.usedObjectCount = 0;
  		this.directMemoryService = directMemoryService;
  		
  		inUseBlockCount = objectCount;
  		inUseBlockAddress = directMemoryService.allocateMemory(inUseBlockCount);
  		sampleObject = JvmUtil.getSampleInstance(elementType);
  		if (sampleObject == null) {
  			throw new IllegalStateException("Unable to create a sample object for class " + elementType.getName());
  		}
  		synchronized (sampleObject) {
  			sampleHeader = directMemoryService.getLong(sampleObject, 0L);
  		}
  		objectSize = directMemoryService.sizeOfObject(sampleObject);
  		offHeapSampleObjectAddress = directMemoryService.allocateMemory(objectSize);
  		directMemoryService.copyMemory(sampleObject, 0L, null, offHeapSampleObjectAddress, objectSize);
  		/*
  		for (int i = 0; i < objectSize; i += JvmUtil.LONG_SIZE) {
  			directMemoryService.putLong(offHeapSampleObjectAddress + i, directMemoryService.getLong(sampleObject, i));
  		}
  		*/
  		/*
  		for (int i = 0; i < objectSize; i++) {
  			directMemoryService.putByte(offHeapSampleObjectAddress + i, directMemoryService.getByte(sampleObject, i));
  		}
  		*/
  		// directMemoryService.copyMemory(directMemoryService.addressOf(sampleObject), offHeapSampleObjectAddress, objectSize);
  	} 
                              #location 20 
                              #vulnerability type THREAD_SAFETY_VIOLATION