JVMPI class load event problem

Question

Hi
I'm trying to write a simple profiler using JVM Profiler Interface to
display classes loaded while running my application.
For this, I have registered callback to notify two events
JVMPI_EVENT_CLASS_LOAD and JVMPI_EVENT_CLASS_LOAD_HOOK.
Now the problem is that, for some system classes which are loaded
initialy(during JVM initialization) I'm not getting
JVMPI_EVENT_CLASS_LOAD_HOOK event. However JVMPI_EVENT_CLASS_LOAD gets
called for each of them. ( I want .._LOAD_HOOK for all classes)
I gone through some documents/links which says that
JVMPI_EVENT_CLASS_LOAD_HOOK will be sent only after
JVMPI_EVENT_JVM_INIT_DONE event is sent.
I want JVMPI_EVENT_CLASS_LOAD_HOOK event for all classes, even they
are loaded before JVM initialization is complete.
Is there any way to achieve this? Any work arround?
I'm using J2SDK 1.4.2.
Thanks in advance
Rohan

Answer 1

I want JVMPI_EVENT_CLASS_LOAD_HOOK event for allThe JVMPI api was always experimantal. It has now been superseded by the JVM TI work done for Tiger as part of JSR-163.
This article describes the new API and how to make the transition:
The JVMPI Transition to JVMTI
http://java.sun.com/developer/technicalArticles/Programming/jvmpitransition/
Is there any way to achieve this? Any work arround?When your monitoring agent gets control after JVMTI_EVENT_VM_INIT, use the GetLoadedClasses method to return all of the classes loaded up to that point.
If you also request notification for all subsequently loaded classes (via JVMTI_EVENT_CLASS_FILE_LOAD_HOOK) then after suspending the VM you should have information on all classes loaded since the genesis of the VM.
The HPROF profiling agent was converted to use the new class loading notification mechanism. Refer to the
I'm using J2SDK 1.4.2.I suggest you update your project to use the new APIs provided with JSRs 163 and 174.