The following are examples of j_events.d.

This counts events from all Java processes on the system with hotspot

provider support (1.6.0). Some events such as method calls are only visible

when using the flag "+ExtendedDTraceProbes". eg,

java -XX:+ExtendedDTraceProbes classfile

Here you can see it running while the program Code/Java/Func_abc

# j_events.d

Tracing... Hit Ctrl-C to end.

^C

PID EVENT COUNT

311379 AttachCurrentThread-entry 1

311379 AttachCurrentThread-return 1

311379 CallIntMethod-entry 1

311379 CallIntMethod-return 1

311379 CallStaticBooleanMethod-entry 1

311379 CallStaticBooleanMethod-return 1

311379 CallStaticObjectMethod-entry 1

311379 CallStaticObjectMethod-return 1

311379 CallStaticObjectMethodV-entry 1

311379 CallStaticObjectMethodV-return 1

311379 CallStaticVoidMethod-entry 1

311379 CallStaticVoidMethod-return 1

311379 CreateJavaVM-entry 1

311379 CreateJavaVM-return 1

311379 DestroyJavaVM-entry 1

311379 DestroyJavaVM-return 1

311379 DetachCurrentThread-entry 1

311379 DetachCurrentThread-return 1

311379 ExceptionCheck-entry 1

311379 ExceptionCheck-return 1

311379 ExceptionClear-entry 1

311379 ExceptionClear-return 1

311379 GetDefaultJavaVMInitArgs-entry 1

311379 GetDefaultJavaVMInitArgs-return 1

311379 GetJavaVM-entry 1

311379 GetJavaVM-return 1

311379 GetStringRegion-entry 1

311379 GetStringRegion-return 1

311379 NewByteArray-entry 1

311379 NewByteArray-return 1

311379 NewObject-entry 1

311379 NewObject-return 1

311379 NewObjectV-entry 1

311379 NewObjectV-return 1

311379 SetBooleanField-entry 1

311379 SetBooleanField-return 1

311379 ToReflectedMethod-entry 1

311379 ToReflectedMethod-return 1

311379 vm-init-begin 1

311379 vm-init-end 1

311379 vm-shutdown 1

311379 NewGlobalRef-entry 2

311379 NewGlobalRef-return 2

311379 monitor-wait 2

311379 GetStaticFieldID-entry 3

311379 GetStaticFieldID-return 3

311379 NewObjectArray-entry 3

311379 NewObjectArray-return 3

311379 SetStaticObjectField-entry 3

311379 SetStaticObjectField-return 3

311379 GetStaticMethodID-entry 4

311379 GetStaticMethodID-return 4

311379 EnsureLocalCapacity-entry 5

311379 EnsureLocalCapacity-return 5

311379 SetByteArrayRegion-entry 5

311379 SetByteArrayRegion-return 5

311379 SetLongField-entry 5

311379 SetLongField-return 5

311379 GetMethodID-entry 6

311379 GetMethodID-return 6

311379 GetObjectArrayElement-entry 6

311379 GetObjectArrayElement-return 6

311379 GetSuperclass-entry 6

311379 GetSuperclass-return 6

311379 thread-start 6

311379 SetIntField-entry 8

311379 SetIntField-return 8

311379 GetArrayLength-entry 9

311379 GetArrayLength-return 9

311379 GetByteArrayRegion-entry 9

311379 GetByteArrayRegion-return 9

311379 RegisterNatives-entry 9

311379 RegisterNatives-return 9

311379 GetObjectClass-entry 10

311379 GetObjectClass-return 10

311379 FindClass-entry 11

311379 FindClass-return 11

311379 SetObjectArrayElement-entry 12

311379 SetObjectArrayElement-return 12

311379 GetStringUTFLength-entry 18

311379 GetStringUTFLength-return 18

311379 GetStringUTFRegion-entry 18

311379 GetStringUTFRegion-return 18

311379 GetFieldID-entry 21

311379 GetFieldID-return 21

309790 CallStaticVoidMethod-entry 24

309790 CallStaticVoidMethod-return 24

194441 CallStaticVoidMethod-entry 26

194441 CallStaticVoidMethod-return 26

311379 GetStringUTFChars-entry 29

311379 GetStringUTFChars-return 29

311379 ReleaseStringUTFChars-entry 29

311379 ReleaseStringUTFChars-return 29

311379 CallObjectMethod-entry 30

311379 CallObjectMethod-return 30

311379 GetStringCritical-entry 35

311379 GetStringCritical-return 35

311379 ReleaseStringCritical-entry 35

311379 ReleaseStringCritical-return 35

311379 ExceptionOccurred-entry 46

311379 ExceptionOccurred-return 46

311379 GetStringLength-entry 54

311379 GetStringLength-return 54

311379 NewStringUTF-entry 54

311379 NewStringUTF-return 54

311379 NewString-entry 55

311379 NewString-return 55

311379 GetObjectField-entry 60

311379 GetObjectField-return 60

311379 DeleteLocalRef-entry 108

311379 DeleteLocalRef-return 108

311379 class-loaded 327

311379 object-alloc 5389

311379 method-return 12024

311379 method-entry 12031

You can see that nearly all of the events recorded are from PID 311379, which

we can assume in this case is the program in question. Not all of the lines

correspond to this, however, which is something to be aware of while analysing

the results.