dtrace discuss - Jun 2008 - Stack trace of java application using Dtrace

Hi all

i want to view the stack trace of the real time java application using DTrace
probes.
i am using jrts provider for finding the information of real time threads.
In this i have used the ustack(), jstack() and this gives the following type of
information

libjvm.so`__1cJJavaCallsMcall_virtual6FpnJJavaValue_nGHandle_nLKlassHandle_nMsymbolHandle_5pnGThread__v_+0x5e
              libjvm.so`__1cMthread_entry6FpnKJavaThread_pnGThread__v_+0xc8
              libjvm.so`__1cKJavaThreadRthread_main_inner6M_v_+0x51
              libjvm.so`__1cKJavaThreadDrun6M_v_+0x163
              libjvm.so`__1cG_start6Fpv_0_+0x4c
              libc.so.1`_thr_setup+0x4e
              libc.so.1`_lwp_start

But i want to trace following type of information

java.net.SocketInputStream.socketRead0(Native Method)
java.net.SocketInputStream.read(SocketInputStream.java:129)
java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
java.io.BufferedInputStream.read(BufferedInputStream.java:235)
java.io.FilterInputStream.read(FilterInputStream.java:66)
sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:448)
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
java.lang.Thread.run(Thread.java:713)


--
This message posted from opensolaris.org

Hi,

 From the call stack you sent, the thread is not executing
Java code yet, so only the native methods called are displayed.

Here''s an output produced by jstack() where the thread has some
Java methods (from classes Vector and synchronizedvector) on its call 
stack :

libjvm.so`void ObjectMonitor::enter_interruptible(int,Thread*)+0x284
libjvm.so`void 
ObjectSynchronizer::instance_slow_enter(Handle,BasicLock*,int,Thread*)+0x16a
libjvm.so`void 
ObjectSynchronizer::slow_enter_interruptible(Handle,BasicLock*,int,Thread*)+0x37
libjvm.so`void 
InterpreterRuntime::monitorenter(JavaThread*,BasicObjectLock*)+0x63
java/util/Vector.add
synchronizedvector/Main$RealTimeProducer.run
StubRoutines
libjvm.so`void 
JavaCalls::call_helper(JavaValue*,methodHandle*,JavaCallArguments*,Thread*)+0x1a1
libjvm.so`void 
os::os_exception_wrapper(void(*)(JavaValue*,methodHandle*,JavaCallArguments*,Thread*),JavaValue*,methodHandle*,JavaCallArguments*,Thread*)+0x14
libjvm.so`void 
JavaCalls::call(JavaValue*,methodHandle,JavaCallArguments*,Thread*)+0x28
libjvm.so`void 
JavaCalls::call_virtual(JavaValue*,KlassHandle,symbolHandle,symbolHandle,JavaCallArguments*,Thread*)+0xa7
libjvm.so`void 
JavaCalls::call_virtual(JavaValue*,Handle,KlassHandle,symbolHandle,symbolHandle,Thread*)+0x5e
libjvm.so`void thread_entry(JavaThread*,Thread*)+0x12b
libjvm.so`void RealtimeThread::thread_main_inner()+0x154
libjvm.so`void JavaThread::run()+0x163
libjvm.so`void*_start(void*)+0x4c
libc.so.1`_thr_setup+0x4e
libc.so.1`_lwp_start

So, jstack() prints the full stack, including native calls and Java calls.
Java methods are displayed with their full Java name, but the
line numbers are not displayed.

The jrts provider is specific to the Java Real-Time System, so I suggest
you to post your questions on the Java RTS forum :

http://forum.java.sun.com/forum.jspa?forumID=548


Fred

Gaurav wrote:
> Hi all
>
> i want to view the stack trace of the real time java application using
DTrace probes.
> i am using jrts provider for finding the information of real time threads.
> In this i have used the ustack(), jstack() and this gives the following
type of information
>
>
libjvm.so`__1cJJavaCallsMcall_virtual6FpnJJavaValue_nGHandle_nLKlassHandle_nMsymbolHandle_5pnGThread__v_+0x5e
>               libjvm.so`__1cMthread_entry6FpnKJavaThread_pnGThread__v_+0xc8
>               libjvm.so`__1cKJavaThreadRthread_main_inner6M_v_+0x51
>               libjvm.so`__1cKJavaThreadDrun6M_v_+0x163
>               libjvm.so`__1cG_start6Fpv_0_+0x4c
>               libc.so.1`_thr_setup+0x4e
>               libc.so.1`_lwp_start
>
> But i want to trace following type of information
>
> java.net.SocketInputStream.socketRead0(Native Method)
> java.net.SocketInputStream.read(SocketInputStream.java:129)
> java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> java.io.BufferedInputStream.read(BufferedInputStream.java:235)
> java.io.FilterInputStream.read(FilterInputStream.java:66)
> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:448)
>
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
> java.lang.Thread.run(Thread.java:713)
>
>
> --
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
>   

-- 
Frederic Parain - Sun Microsystems
180, av. de l''Europe, ZIRST de Montbonnot
38334 Saint Ismier, FRANCE
Phone: +33 4 76 18 81 17
Email: Frederic.Parain at Sun.COM