Could I use btrace to track methods in sun.misc.Unsafe?

[kuaiwei]

I could use btrace script to trace other java methods. But when I try to trace sun.misc.Unsafe::allocateMemory or sun.misc.Unsafe::freeMemory, I can not get output. Can you tell me if it's a limit of btrace?

[jbachorik]

Unfortunately, no. Unsafe is a protected class for BTrace - we can't instrument it since we strongly depend on that class. Also, this particular method is 'native' and BTrace does not support native method instrumentation.