#vulnerable code 
                             private void init() throws IOException {
		Map<String, Counter> perfCounters = null;
		try {
			perfData = PerfData.connect(Integer.parseInt(pid));
			perfCounters = perfData.getCounters();
			initPerfCounters(perfCounters);
			perfDataSupport = true;
		} catch (Throwable ignored) {
		}

		if (perfDataSupport) {
			vmArgs = (String) perfCounters.get("java.rt.vmArgs").getValue();
		} else {
			vmArgs = Formats.join(jmxClient.getRuntimeMXBean().getInputArguments(), " ");
		}

		startTime = jmxClient.getRuntimeMXBean().getStartTime();

		Map<String, String> taregetVMSystemProperties = jmxClient.getRuntimeMXBean().getSystemProperties();
		osUser = taregetVMSystemProperties.get("user.name");
		jvmVersion = taregetVMSystemProperties.get("java.version");
		jvmMajorVersion = getJavaMajorVersion(jvmVersion);
		permGenName = jvmMajorVersion >= 8 ? "metaspace" : "perm";

		threadStackSize = 1024
				* Long.parseLong(jmxClient.getHotSpotDiagnosticMXBean().getVMOption("ThreadStackSize").getValue());
		maxDirectMemorySize = Long
				.parseLong(jmxClient.getHotSpotDiagnosticMXBean().getVMOption("MaxDirectMemorySize").getValue());
		maxDirectMemorySize = maxDirectMemorySize == 0 ? -1 : maxDirectMemorySize;

		threadCpuTimeSupported = jmxClient.getThreadMXBean().isThreadCpuTimeSupported();
		threadMemoryAllocatedSupported = jmxClient.getThreadMXBean().isThreadAllocatedMemorySupported();

		processors = jmxClient.getOperatingSystemMXBean().getAvailableProcessors();
		warningRule.updateProcessor(processors);

		isLinux = System.getProperty("os.name").toLowerCase(Locale.US).contains("linux");
	} 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             private void init() throws IOException {
		Map<String, Counter> perfCounters = null;
		try {
			perfData = PerfData.connect(Integer.parseInt(pid));
			perfCounters = perfData.getAllCounters();
			initPerfCounters(perfCounters);
			perfDataSupport = true;
		} catch (Throwable ignored) {
		}

		if (perfDataSupport) {
			vmArgs = (String) perfCounters.get("java.rt.vmArgs").getValue();
		} else {
			vmArgs = Formats.join(jmxClient.getRuntimeMXBean().getInputArguments(), " ");
		}

		startTime = jmxClient.getRuntimeMXBean().getStartTime();

		Map<String, String> taregetVMSystemProperties = jmxClient.getRuntimeMXBean().getSystemProperties();
		osUser = taregetVMSystemProperties.get("user.name");
		jvmVersion = taregetVMSystemProperties.get("java.version");
		jvmMajorVersion = getJavaMajorVersion(jvmVersion);
		permGenName = jvmMajorVersion >= 8 ? "metaspace" : "perm";

		threadStackSize = 1024
				* Long.parseLong(jmxClient.getHotSpotDiagnosticMXBean().getVMOption("ThreadStackSize").getValue());
		maxDirectMemorySize = Long
				.parseLong(jmxClient.getHotSpotDiagnosticMXBean().getVMOption("MaxDirectMemorySize").getValue());
		maxDirectMemorySize = maxDirectMemorySize == 0 ? -1 : maxDirectMemorySize;

		threadCpuTimeSupported = jmxClient.getThreadMXBean().isThreadCpuTimeSupported();
		threadMemoryAllocatedSupported = jmxClient.getThreadMXBean().isThreadAllocatedMemorySupported();

		processors = jmxClient.getOperatingSystemMXBean().getAvailableProcessors();
		warningRule.updateProcessor(processors);

		isLinux = System.getProperty("os.name").toLowerCase(Locale.US).contains("linux");
	}