DTrace jstack() function prints Java method names. But, it does not print method signatures. Because Java methods are overloaded by argument types, it may be useful to view signatures as part of output. With this change, the stack trace would look like:

              pollsys:entry
              libc.so.1`__pollsys+0x4
              libc.so.1`poll+0x7c
              libjvm.so`__1cIos_sleep6Fxb_i_+0xa28
              libjvm.so`__1cCosFsleep6FpnGThread_xb_i_+0x1f0
              libjvm.so`JVM_Sleep+0x518
              java/lang/Thread.sleep(J)V
              java/lang/Thread.sleep(J)V
              t.main([Ljava/lang/String;)V
             [....]

instead of this:

              pollsys:entry
              libc.so.1`__pollsys+0x4
              libc.so.1`poll+0x7c
              libjvm.so`__1cIos_sleep6Fxb_i_+0x8d4
              libjvm.so`__1cCosFsleep6FpnGThread_xb_i_+0x204
              libjvm.so`JVM_Sleep+0x534
              java/lang/Thread.sleep
              java/lang/Thread.sleep
              t.main
              [....]