[antlr-interest] Antlr Works debugger hangs on Linux (and Windows)

[Jeffrey Newman]

On Tue, 2010-12-07 at 07:30 -0800, Jeffrey Newman wrote:
> I think I have solved the problem.
> Sorry for the noise on the mailing list.
> What I found was the following.
> 
> On Suse 11.2 you must remove the exisiting antlr with Yaste.
> Then copy the antler works jar and antlr complete jar to favorite place.
> Then download the latest java jdk.
> Set up the path to include the java binaries,
> Set the class path to the antlr complete jar.
> Then use the T.g file for test.
> This seems to have actions. And it seems that Antlr works just hangs
> when running the debugger on the expr.g sample file.
> 
> So, both Linux and Windows now show something with the T.g, and back to
> my studies.
> 
> Jeffrey
> 
> On Tue, 2010-12-07 at 04:28 -0800, Jeffrey Newman wrote:
> > I'm trying to get Antlr works debugger to work with a simple test
> > grammer. I'm working on Linux (Suse 11.2).
> > 
> > I get a few steps into the debugger.
> > and then AntlrWorks hangs.
> > 
> > The linux console shows:
> > jeffn at merlin-3:/opt/antlr> ./antlrworks
> > java.lang.NullPointerException
> > java.lang.NullPointerException
> >         at
> > org.antlr.runtime.debug.RemoteDebugEventSocketListener.dispatch(RemoteDebugEventSocketListener.java:275)
> >         at
> > org.antlr.runtime.debug.RemoteDebugEventSocketListener.eventHandler(RemoteDebugEventSocketListener.java:176)
> >         at
> > org.antlr.runtime.debug.RemoteDebugEventSocketListener.run(RemoteDebugEventSocketListener.java:472)
> >         at java.lang.Thread.run(Thread.java:662)
> > 
> > So, this looks like a NULL Pointer.
> > Any suggestions about what I can do to use the Antlrworks debugger?
> > 
> > Any help would really be appreciated.
> > I've tried to bring this up Windows, and I have a similar problem.
> > 
> > thanks in advance 
> > 
> > Jeffrey
> > 
> > 
> > Following is from the events tab.
> > 0
> > Commence
> > 
> > 
> > 
> > 
> > 1
> > Enter
> > rule /home/jeffn/tmp/antlr-book/chap-3/Expr.g:prog
> > 
> > 
> > 
> > 
> > 2
> > Location
> > (6,1)
> > 
> > 
> > 
> > 
> > 3
> > Enter alt 1
> > 
> > 
> > 
> > 
> > 4
> > Location
> > (6,8)
> > 
> > 
> > 
> > 
> > 5
> > Enter
> > subrule 1
> > 1
> > 
> > 
> > 
> > 
> > Grammar:
> > 
> > 
> > grammar Expr;
> > 
> > prog	:	stat+ ;
> > 
> > stat	:	expr NEWLINE
> > 	|	ID '=' NEWLINE
> > 	|	NEWLINE
> > 	;
> > 	
> > expr	:	multExpr (('+' | '-') multExpr)*
> > 	;
> > 	
> > multExpr
> > 	:	atom ('*' atom)*
> > 	;
> > 	
> > atom	:	INT
> > 	|	ID
> > 	|	'(' expr ')'
> > 	;
> > 	
> > ID	:	('a'..'z' | 'A'.. 'Z')+ ;
> > INT	:	'0'..'9'+ ;
> > NEWLINE :	'\r'? '\n' ;
> > WS	:	(' ' | '\t' | '\n' | '\r')+  {skip();} ;
> > 		
> > 
> > 
> > 
> > 
> > 
> > 
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>