I applied this patch and your other suggestion, and rebuilt, and now I cannot
make it through the regression tests. tcljava/AutomaticSignature.test appears to
deadlock. Can anyone help? My deadline is near, and I am close to having to
abandon TclBlend as a solution, which I really do not want to have to do.
Jiang Wu wrote:
> Yes. You can download the patch from:
>
> http://www-cs-students.stanford.edu/~jwu/tclblend.patch
>
> Note that the patch does NOT remove the JAVA_LOCK code in TclBlend. It is
> still possible to deadlock after applying the patch due to JAVA_LOCK. Your
> stack trace looks JAVA_LOCK is causing the problem. When I did the patch, I
> did not realize the possibility of a garbage collector thread accessing
> TclBlend.
>
> The patch allows one to use TclBlend from "one and only one thread" without
> any problems. In your case, both the garbage collector thread and the main
> thread are using TclBlend! This can cause deadlock.
>
> You probably want to apply the patch and remove the JAVA_LOCK. To remove
> JAVA_LOCK, you should change the #define JAVA_LOCK and #define JAVA_UNLOCK
> in java.h of TclBlend to remove the lines that do MonitorEnter and
> MonitorExit:
>
> #define JAVA_LOCK() \
> { \
> /* (*env)->MonitorEnter(env, java.NativeLock); \ <--- comment out this
> line */
> oldEnv = JavaSetEnv(env); \
> }
>
> #define JAVA_UNLOCK() \
> { \
> JavaSetEnv(oldEnv); \
> /* (*env)->MonitorExit(env, java.NativeLock); \ <--- comment out this
> line */
> }
>
> You need to leave the other lines that sets the java environment unchanged
> because TclBlend depends on that.
>
> -- Jiang Wu
> [EMAIL PROTECTED]
>
> -----Original Message-----
> From: Dr Wes Munsil [mailto:[EMAIL PROTECTED]]
> Sent: Sunday, June 04, 2000 9:46 PM
> To: Scott Redman
> Cc: [EMAIL PROTECTED]
> Subject: [Tcl Java] Re: [Tcl Java] finalization deadlock under Solaris
>
> Thank you. Would that be "The Mythical TclBlend Patch" of April 4? It's
> certainly
> worth a try. Does anyone have TclBlend 1.2.5 with this patch applied built
> for
> Solaris?
>
> Scott Redman wrote:
>
> > Try commenting out the JAVA_LOCK() code in the the TclBlend
> > .c files (actually, just change the #define in the header).
> > Or, try using Jiang Wu's patch (see the archive for this
> > mailing list). Jiang's patch is safer.
> >
> > -- Scott
> >
> > Dr Wes Munsil wrote:
> > >
> > > [Sorry if this is duplicated. May have sent to the wrong place first. Or
> > > not.]
> > >
> > > I seem to be encountering a deadlock in finalization in TclBlend. I am
> > > running JDK 1.1.8, Tcl 8.2.3, and TclBlend 1.2.5 under Vignette's
> > > StoryServer 5.0 page-generation product on SunOS 5.6. When the
> > > page-generation process hangs, I take a stack snapshot, and what I think
> > > are the main thread and the garbage collection thread stacks look
> > > suspicious. They are listed below. Do you have any ideas as to what's
> > > going on, and what I can do about it? I'd try setting tclblend_init to
> > > "-noasyncgc", but that apparently only works with JDK 1.2.2, and in any
> > > case I'm afraid that would just make the problem happen less often
> > > instead of solving it.
> > >
> > > Thank you.
> > >
> > > MAIN THREAD
> > >
> > > #0 0xeeb397c0 in _lwp_sema_wait ()
> > > #1 0xef2c7eb8 in _park ()
> > > #2 0xef2c7b9c in _swtch ()
> > > #3 0xef2c68bc in _cond_wait_cancel ()
> > > #4 0xee99acc8 in condvarWait ()
> > > #5 0xee998cc0 in sysMonitorWait ()
> > > #6 0xee96638c in runFinalization0 ()
> > > #7 0xee968d44 in manageAllocFailure ()
> > > #8 0xee96749c in realObjAlloc ()
> > > #9 0xee966eb0 in cacheAlloc ()
> > > #10 0xee967210 in realObjAlloc ()
> > > #11 0xee967ad0 in ObjAlloc ()
> > > #12 0xee9600c0 in newobject ()
> > > #13 0xee9a0de0 in new_quick_0 ()
> > > #14 0xee974708 in jni_Invoke ()
> > > #15 0xee976394 in jni_CallVoidMethodV ()
> > > #16 0xee97ab5c in invoke_CallVoidMethod ()
> > > #17 0xeea46324 in FreeTclObject ()
> > > #18 0xef05c7f4 in TclFreeObj ()
> > > #19 0xef05ed50 in Tcl_EvalEx ()
> > > #20 0xef05e9f4 in Tcl_EvalTokens ()
> > > #21 0xef05eccc in Tcl_EvalEx ()
> > > #22 0xef05e9f4 in Tcl_EvalTokens ()
> > > #23 0xef05eccc in Tcl_EvalEx ()
> > > #24 0xef05ef04 in Tcl_Eval ()
> > > #25 0xef715e70 in __0fJctlInterpHevalTclRPCcPCcR6JctlBufferi ()
> > > #26 0xef715a24 in __0fJctlInterpMevalTemplatePCcUiR6JctlBufferi ()
> > > #27 0xef716f7c in __0fJctlInterpEEVALPvP6KTcl_InterpiPPcT ()
> > > #28 0x2f8d8 in __0FCIFPvP6KTcl_InterpiPPc ()
> > > #29 0xef021e7c in TclInvokeStringCommand ()
> > > #30 0xef05e69c in EvalObjv ()
> > > #31 0xef05ed18 in Tcl_EvalEx ()
> > > #32 0xef05ef04 in Tcl_Eval ()
> > > etc...
> > >
> > > GARBAGE COLLECTION THREAD
> > >
> > > #0 0xeeb397c0 in _lwp_sema_wait ()
> > > #1 0xef2c7eb8 in _park ()
> > > #2 0xef2c7b9c in _swtch ()
> > > #3 0xef2c9314 in _mutex_adaptive_lock ()
> > > #4 0xef2c9020 in _cmutex_lock ()
> > > #5 0xef2d67d4 in _pthread_mutex_lock ()
> > > #6 0xee998a6c in sysMonitorEnter ()
> > > #7 0xee985080 in monitorEnter ()
> > > #8 0xee97960c in jni_MonitorEnter ()
> > > #9 0xeea4679c in Java_tcl_lang_CObject_decrRefCount ()
> > > #10 0xee99c504 in desc_loop ()
> > > #11 0xee95f7b0 in invokeJNINativeMethod ()
> > > #12 0xee99cdd8 in notJavaInvocation ()
> > > #13 0xee9711ec in do_execute_java_method_vararg ()
> > > #14 0xee970b9c in do_execute_java_method ()
> > > #15 0xee966b68 in finalizer_loop ()
> > > #16 0xee9993a4 in _start ()
> > >
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