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How to use loadAgent method of sun.tools.attach.HotSpotVirtualMachine class

Best Powermock code snippet using sun.tools.attach.HotSpotVirtualMachine.loadAgent

Source:JvmSelfAttach.java

...122                    "L" + cnname.replace('.', '/') + ";"123            );124            UA.getUnsafe().defineClass(null, code, 0, code.length, ClassLoader.getSystemClassLoader(), null);125        }126        loadAgent(cnname, EAN, rdfile);127        fetchInst(cnname);128    }129    private static void loadAgent(String cnname, String EAN, File rdfile) throws Throwable {130        String absp = rdfile.getAbsolutePath();131        List<Throwable> allFails = new ArrayList<>();132        try { //java.instrument133            Method met = Class.forName("sun.instrument.InstrumentationImpl")134                    .getDeclaredMethod("loadAgent", String.class);135            UA.setAccessible(met, true);136            met.invoke(null, absp);137            return;138        } catch (Throwable e) {139            allFails.add(e);140        }141        long pid;142        String pid_str;143        try {144            Class<?> PH = Class.forName("java.lang.ProcessHandle");145            MethodHandles.Lookup lk = MethodHandles.lookup();146            Object currentProcess = lk.findStatic(PH, "current", MethodType.methodType(PH)).invoke();147            pid = (long) lk.findVirtual(PH, "pid", MethodType.methodType(long.class)).invoke(currentProcess);148            pid_str = Long.toString(pid);149        } catch (Throwable ignored) {150            RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();151            String name = runtimeMXBean.getName();152            pid_str = name.substring(0, name.indexOf('@'));153            pid = Long.parseLong(pid_str);154        }155        try { // jdk.attach156            System.setProperty("jdk.attach.allowAttachSelf", "true");157            try {158                Class<?> VM = Class.forName("jdk.internal.misc.VM");159                Field f = VM.getDeclaredField("savedProps");160                UA.setAccessible(f, true);161                ((Map) f.get(null)).put("jdk.attach.allowAttachSelf", "true");162            } catch (Throwable a) {163                allFails.add(a);164            }165            try {166                Class<?> HotSpotVirtualMachine = Class.forName("sun.tools.attach.HotSpotVirtualMachine");167                UA.getUnsafe().ensureClassInitialized(HotSpotVirtualMachine);168                Field attach_self = HotSpotVirtualMachine.getDeclaredField("ALLOW_ATTACH_SELF");169                UA.setAccessible(attach_self, true);170                try {171                    attach_self.setBoolean(null, true);172                } catch (Throwable w) {173                    allFails.add(w);174                    Unsafe unsafe = UA.getUnsafe();175                    unsafe.putBoolean(176                            unsafe.staticFieldBase(attach_self),177                            unsafe.staticFieldOffset(attach_self),178                            true179                    );180                }181            } catch (Throwable a) {182                allFails.add(a);183            }184            VirtualMachine attach = VirtualMachine.attach(pid_str);185            attach.loadAgent(absp);186            attach.detach();187            return;188        } catch (Throwable e) {189            allFails.add(e);190        }191        try {192            File javaHome = new File(System.getProperty("java.home"));193            if (javaHome.getName().equals("jre")) {194                javaHome = javaHome.getParentFile();195            }196            File tools = new File(javaHome, "lib/tools.jar");197            if (tools.exists()) {198                URLClassLoader urlClassLoader = new URLClassLoader(new URL[]{199                        tools.toURI().toURL()200                });201                Class<?> vm = urlClassLoader.loadClass("com.sun.tools.attach.VirtualMachine");202                Object attach = vm.getMethod("attach", String.class).invoke(null, pid_str);203                vm.getMethod("loadAgent", String.class).invoke(attach, absp);204                vm.getMethod("detach").invoke(attach);205                return;206            }207        } catch (Throwable e) {208            allFails.add(e);209        }210        LinkageError error = new LinkageError("Failed to attach self, try upgrade your java version or use JDK");211        for (Throwable t : allFails) {212            error.addSuppressed(t);213        }214        throw error;215    }216    private static void fetchInst(String cname) throws Throwable {217        Class<?> c = Class.forName(cname, false, ClassLoader.getSystemClassLoader());...

Source:IConstants.java

...46    /** The method name for MonitoredHost#activeVms(). */47    static final String ACTIVE_VMS_METHOD = "activeVms";48    /** The qualified class name for VirtualMachine. */49    static final String VIRTUAL_MACHINE_CLASS = "com.sun.tools.attach.VirtualMachine";50    /** The method name for VirtualMachine#loadAgent(). */51    static final String LOAD_AGENT_METHOD = "loadAgent";52    /** The method name for VirtualMachine#detach(). */53    static final String DETACH_METHOD = "detach";54    /** The method name for VirtualMachine#getSystemProperties(). */55    static final String GET_SYSTEM_PROPERTIES_METHOD = "getSystemProperties";56    /** The method name for VirtualMachine#getMonitoredHost(). */57    static final String GET_MONITORED_HOST_CLASS = "getMonitoredHost";58    /** The method name for VirtualMachine#getAgentProperties(). */59    static final String GET_AGENT_PROPERTIES_METHOD = "getAgentProperties";60    /** The method name for URLClassLoader#addURL(). */61    static final String ADD_URL_METHOD = "addURL";62    /** The method name for VirtualMachine#attach(). */63    static final String ATTACH_METHOD = "attach";64    /** The library name for attach. */65    static final String ATTACH_LIBRARY = "attach";...

Source:MyAgent.java

...54     */55    public static void loadVirtualMachine() throws Exception{56        String jvmPid="targetPid";57//        VirtualMachine jvm = VirtualMachine.attach(jvmPid);58//        jvm.loadAgent(agentFilePath);//agentFilePathä¸ºagentçè·¯å¾59//        jvm.detach();60//        logger.info("Attached to target JVM and loaded Java agent successfully");61        //å®éè¿åçæ¯ hotspotVirtualMachine å®ç°ç±»62        VirtualMachine virtualMachine = VirtualMachine.attach(jvmPid);63        virtualMachine.loadAgent("agentFilePath");64        virtualMachine.detach();65    }66}...

loadAgent

Using AI Code Generation

1import java.io.IOException;2import com.sun.tools.attach.VirtualMachine;3import com.sun.tools.attach.AttachNotSupportedException;4import com.sun.tools.attach.VirtualMachineDescriptor;5import java.util.List;6public class 4 {7public static void main(String[] args) {8String agentPath = "C:\\Users\\Administrator\\Desktop\\agent.jar";9List<VirtualMachineDescriptor> vmlist = VirtualMachine.list();10for (VirtualMachineDescriptor vmd : vmlist) {11System.out.println(vmd.id() + " " + vmd.displayName());12}13VirtualMachine vm = null;14try {15vm = VirtualMachine.attach("8044");16vm.loadAgent(agentPath);17vm.detach();18} catch (AttachNotSupportedException e) {19e.printStackTrace();20} catch (IOException e) {21e.printStackTrace();22}23}24}25import java.lang.instrument.Instrumentation;26public class agent {27public static void premain(String agentArgs, Instrumentation inst) {28inst.addTransformer(new agent());29}30public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, java.security.ProtectionDomain protectionDomain, byte[] classfileBuffer) {31if(className.equals("java/lang/Thread")) {32System.out.println("Thread class is being loaded");33}34return null;35}36}

loadAgent

Using AI Code Generation

1import com.sun.tools.attach.VirtualMachine;2import com.sun.tools.attach.VirtualMachineDescriptor;3import java.io.IOException;4import java.util.List;5public class 4 {6    public static void main(String[] args) throws IOException {7        List<VirtualMachineDescriptor> vmlist = VirtualMachine.list();8        for (VirtualMachineDescriptor vmd : vmlist) {9            if (vmd.displayName().equals("4")) {10                VirtualMachine vm = VirtualMachine.attach(vmd);11                vm.loadAgent("C:\\Users\\user\\Desktop\\4\\4\\agent\\agent.jar");12                vm.detach();13            }14        }15    }16}17jvmtiEnv *jvmti;18jvmtiCapabilities caps;19jvmtiEventCallbacks callbacks;20void JNICALL VMInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {21    jclass cls = env->FindClass("java/lang/System");22    jfieldID fid = env->GetStaticFieldID(cls, "out", "Ljava/io/PrintStream;");23    jobject out = env->GetStaticObjectField(cls, fid);24    jclass ps_cls = env->FindClass("java/io/PrintStream");25    jmethodID mid = env->GetMethodID(ps_cls, "println", "(Ljava/lang/String;)V");26    jstring message = env->NewStringUTF("Hello World");27    env->CallVoidMethod(out, mid, message);28}29void JNICALL VMDeath(jvmtiEnv *jvmti_env) {30    printf("VM is shutting down");31}32void JNICALL ThreadStart(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {33    printf("thread started");34}35void JNICALL ThreadEnd(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {36    printf("thread ended");37}38void JNICALL ClassFileLoadHook(jvmtiEnv *jvmti_env, JNIEnv

loadAgent

Using AI Code Generation

1import sun.tools.attach.HotSpotVirtualMachine;2import java.io.File;3public class 4 {4    public static void main(String[] args) throws Exception {5        HotSpotVirtualMachine vm = HotSpotVirtualMachine.attach("12345");6        File agentFile = new File("agent.so");7        vm.loadAgent(agentFile.getAbsolutePath());8    }9}10JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {11    jvmtiEnv *jvmti;12    jvmtiCapabilities capabilities;13    jvmtiError error;14    (*jvm)->GetEnv(jvm, (void **)&jvmti, JVMTI_VERSION_1_0);15    if (error != JVMTI_ERROR_NONE) {16        printf("Unable to get JVMTI environment17");18        exit(1);19    }20    capabilities.can_generate_field_modification_events = 1;21    capabilities.can_generate_field_access_events = 1;22    capabilities.can_generate_breakpoint_events = 1;23    capabilities.can_generate_single_step_events = 1;24    capabilities.can_generate_exception_events = 1;25    capabilities.can_generate_frame_pop_events = 1;26    capabilities.can_generate_method_entry_events = 1;27    capabilities.can_generate_method_exit_events = 1;28    capabilities.can_generate_native_method_bind_events = 1;29    capabilities.can_generate_compiled_method_load_events = 1;30    capabilities.can_generate_monitor_events = 1;31    capabilities.can_generate_vm_object_alloc_events = 1;32    capabilities.can_generate_native_method_bind_events = 1;33    capabilities.can_generate_garbage_collection_events = 1;34    capabilities.can_generate_object_free_events = 1;35    capabilities.can_tag_objects = 1;36    capabilities.can_generate_all_class_hook_events = 1;37    capabilities.can_generate_compiled_method_load_events = 1;38    capabilities.can_generate_monitor_events = 1;39    capabilities.can_generate_vm_object_alloc_events = 1;40    capabilities.can_retransform_classes = 1;41    capabilities.can_retransform_any_class = 1;42    capabilities.can_get_owned_monitor_info = 1;43    capabilities.can_get_current_contended_monitor = 1;

loadAgent

Using AI Code Generation

1import java.io.*;2import java.lang.management.*;3import java.lang.reflect.*;4import java.util.*;5import sun.tools.attach.*;6public class 4 {7    public static void main(String[] args) throws Exception {8        if (args.length != 2) {9            System.out.println("Usage: java 4 <pid> <agent class name>");10            System.exit(1);11        }12        String pid = args[0];13        String agentClassName = args[1];14        System.out.println("pid = " + pid + ", agent class name = " + agentClassName);15        HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(pid);16        vm.loadAgent(agentClassName + ".jar");17        vm.detach();18    }19}20import java.lang.management.*;21import java.lang.reflect.*;22import java.util.*;23public class agent {24    public static void agentmain(String agentArgs, Instrumentation inst) throws Exception {25        System.out.println("agentmain method invoked...");26        System.out.println("agentArgs = " + agentArgs);27        System.out.println("inst = " + inst);28        System.out.println("Class path:");29        String classPath = System.getProperty("java.class.path");30        String[] classPathElements = classPath.split(":");31        for (String classPathElement : classPathElements) {32            System.out.println(classPathElement);33        }34    }35}

loadAgent

Using AI Code Generation

1import sun.tools.attach.*;2import java.io.IOException;3public class 4 {4    public static void main(String[] args) throws IOException {5        String pid = args[0];6        String agentPath = args[1];7        HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(pid);8        vm.loadAgent(agentPath);9        vm.detach();10    }11}12import java.lang.instrument.Instrumentation;13public class Agent {14    public static void premain(String agentArgs, Instrumentation inst) {15        System.out.println("Hello World");16    }17}18import sun.tools.attach.*;19import java.io.IOException;20public class 4 {21    public static void main(String[] args) throws IOException {22        String pid = args[0];23        String agentPath = args[1];24        HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(pid);25        vm.loadAgent(agentPath);26        vm.detach();27    }28}29import java.lang.instrument.Instrumentation;30public class Agent {31    public static void premain(String agentArgs, Instrumentation inst) {

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