[jboss-dev-forums] [Design of JBoss Profiler] - Re: About Kill -3 signal

[yimianshisan]

Thank you Clerbert!

I know the execution can be controlled by MBean well, it's really a better way.

But what I want to know is the principle of the signal handle. I have tried to define my own signal handling method in jbossInspector.cc. as following:

         void signalStartProfiler(int signum)
         {
	              if (profilerRunning>=0) {
	   		      initProfiler();
   	               } else {
       	                      printMessageError();
   			}
           }

and in the JVM_onLoad() method, I added the following code:

             signal(SIGUSR1,signalStartProfiler);

Now I can send signal kill -10  to the process. the profiling now can be started, but the process is dead.  When I delete the following code in   method initProfile,every thing is OK.

             if (profileMemory)
            { 
   	            jvmpi_interface->DisableEvent(JVMPI_EVENT_OBJECT_ALLOC, NULL);
   	            jvmpi_interface->DisableEvent(JVMPI_EVENT_OBJECT_FREE, NULL);
             }

It is interesting, but I don't know why. when I define my own signal handle,what the JVM had done?

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