Re: [Objectscript-users] command line debugger

[Rob C. <ro...@ti...>]

you need to "s" (step) for at least one line, because on the line it  
halts on, "a" has not been declared yet.  It should probably result  
in a NoSuchMemberException which isn't getting printed out for some  
reason


On Oct 17, 2005, at 10:56 PM, Lysander David wrote:

> That appears to work.  However after hitting the
> breakpoint entering this:
>
> writeln ( "a" )
>
> results in nothing being written to standard out.
>
> Does that successfully write anything to standarad out
> for you ?
>
> If not, do you know what needs to be changed in
> order to allow that command to successfully output
> text ?
>
> Thanks,
> Lysander
>
>
> --- Rob Clark <ro...@ti...> wrote:
>
>
>> not really... you might be able to use the debugger
>> API to setup a
>> read-eval-print shell to run at certain file and
>> line numbers... for
>> example:
>>
>>
>> // dbg.os:
>>
>> function setBreakpoint( filename, line )
>> {
>>    var file = pkg.fs.resolve(filename);
>>    Debugger.setBreakpoint(
>>      file, line,
>>      new function() extends Debugger.Breakpoint() {
>>
>>        public function handle( scope, file, line )
>>        {
>>          var status = null;
>>
>>
>>          mixin java.io;
>>          writeln("hit breakpoint at " + file + ":" +
>> line);
>>          var shell = new function() extends
>> oscript.Shell(
>>            new BufferedReader( new
>> InputStreamReader(System.in) ),
>>            new PrintWriter(System.out),
>>            new PrintWriter(System.err)
>>          ) {
>>
>>            // overload to evaluate in the scope of
>> the breakpoint
>>            public function evalStr(str)
>>            {
>>              // note: default implementation of
>> read() automagically
>> appends ";"
>>              if( (str == "exit;") || (str == "c;") )
>> status = "exit";
>>              else if( str == "step;" || (str ==
>> "s;") ) status = "step";
>>
>>              if( status != null )
>>                return status;
>>
>>              return
>> oscript.OscriptInterpreter.__eval( str, scope );
>>            }
>>
>>            private var _super_read = read;
>>
>>            public function read()
>>            {
>>              if( status != null )
>>                return "exit";
>>              return _super_read();
>>            }
>>
>>          }();
>>
>>          shell.run();
>>
>>          if( status == "step" )
>>            return this;   // keep stepping
>>
>>          return null;     // stop stepping
>>        }
>>
>>      }()
>>    );
>> }
>>
>>
>> ---------------------------
>>
>> // test.os
>>
>> import "dbg.os";
>>
>> var globalvar = 2;
>>
>> function test()
>> {
>>    var a = 1;     // <--- line 8
>>    var b = 2;
>>    writeln("a=" + a + ", b=" + b + ", globalvar=" +
>> globalvar);
>> }
>>
>>
>> setBreakpoint("test.os",8);
>>
>> test();
>>
>>
>> ---------------------------
>>
>> this is not very clean, but just meant to be an
>> example..  maybe
>> someday someone will have some time to package this
>> up into a nice
>> command-line debugger program.
>>
>>
>>
>> On Oct 17, 2005, at 3:08 PM, Lysander David wrote:
>>
>>
>>> Hi,
>>>
>>> Is there a commandline debugger for objectscript ?
>>>
>>> Thanks,
>>> Lysander
>>>
>>
>>
>>
>
>


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