Java support for jstack

[Victor Balada Diaz]

Hello Ronald,

I tried openjdk jstack against diablo-jdk and it doesn't work, so
i just tried using tomcat with openjdk and when running jstack i
get the following error:

yac# /usr/local/openjdk6/bin/jstack -F -l 89291
Attaching to process ID 89291, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 11.0-b17
Deadlock Detection:

No deadlocks found.

Thread -1924730496: (state = BLOCKED)
Error occurred during stack walking:
sun.jvm.hotspot.debugger.DebuggerException:
sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs failed for a
lwp
        at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal
$BsdDebuggerLocalWorkerThread.execute(BsdDebuggerLocal.java:152)
        at
sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.getThreadIntegerRegisterSet(BsdDebuggerLocal.java:455)
        at
sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:65)
        at
sun.jvm.hotspot.runtime.bsd_amd64.BsdAMD64JavaThreadPDAccess.getCurrentFrameGuess(BsdAMD64JavaThreadPDAccess.java:92)
        at
sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:252)
        at
sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:214)
        at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
        at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
        at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
        at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
        at sun.tools.jstack.JStack.main(JStack.java:102)
Caused by: sun.jvm.hotspot.debugger.DebuggerException: get_thread_regs
failed for a lwp
        at
sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.getThreadIntegerRegisterSet0(Native Method)
        at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.access
$800(BsdDebuggerLocal.java:51)
        at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal
$1GetThreadIntegerRegisterSetTask.doit(BsdDebuggerLocal.java:449)
        at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal
$BsdDebuggerLocalWorkerThread.run(BsdDebuggerLocal.java:127)

Locked ownable synchronizers:
    - None

[... same error for all the other threads ...]

Also if i try to use it without -F i get the following error:

/usr/local/openjdk6/bin/jstack  89291
89291: Unable to open socket file: target process not responding or
HotSpot VM not loaded
The -F option can be used when the target process is not responding

Do you have any ideas on what could be wrong?

Thanks a lot.
Regards.

On Sat, 2009-10-03 at 16:11 +0200, Ronald Klop wrote:
> Jstack works in openjdk6.
> Also on a program running in another jdk if I remember it correct.
> 
> Ronald.
> 
> On Thu, 01 Oct 2009 14:42:02 +0200, Victor Balada Diaz  
> <v.balada at coolbleiben.net> wrote:
> 
> > Hello,
> >
> > I'm trying to use jstack in a FreeBSD 7.1-RELEASE-p7 amd64 with
> > diablo-jdk-1.6.0.07.02_3 but i always get the following error:
> >
> > $PID: no providers installed
> >
> > I saw a mail in 2007 asking about what would be needed to make it
> > work, but no answers. Is there any work in progress to make jstack work?
> > What's needed and how can i help?
> >
> > Thanks in advance.
> > Regards.
> >
> > _______________________________________________
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>