Re: Trouble with frysk.expunit.Expect and fhpd

[Andrew Cagney <cagney@redhat.com>]

Adam Jocksch wrote:
> I've been trying to re-tool frysk.hpd.TestDisplayCommand to use 
> funit-rt-varchange instead of hpd-c (bug #4951). However, the expect 
> script fails when fhpd doesn't behave as expected when adding a 
> breakpoint. I've attached the revised version of 
> TestDisplayCommand.java as well as the log created by ./TestRunner 
> -log frysk=FINE frysk.hpd.TestDisplayCommand. Running 
> 'frysk/bindir/fhpd frysk/pkglibdir/funit-rt-varchange' from the 
> frysk-core directory produces the expected results; it's only under 
> Expect that fhpd is functioning strangely.
>
see: http://sourceware.org/bugzilla/show_bug.cgi?id=4914 and 4919 ; 
missting synchronization in fhpd can lead to  expunit can feeding it 
commands to fast.  Try adding a sleep(5) after the run, but before the 
breakpoint is set; something like:

        e.send("run " + Config.getPkgLibFile("funit-stepping-asm") + "\n");
        e.expect(5, "Attached.*\n" + prompt);

        // Remove this - #4919 and #4914.
        try { Thread.sleep(2000); } catch (Exception e) {}

        e.send("break #" + source + "#" + startLine + "\n");
        e.expect("breakpoint.*\n" + prompt);

if this lets it work, keep the sleep and mark the test as 
unresolved(4914).  We can then still run it with --unresolved.

> I've also had fhpd hang when creating a display under expect, but I'm 
> currently unable to reproduce that problem.
>
> Adam
> ------------------------------------------------------------------------
>
> testHpdDisplayCommands(frysk.hpd.TestDisplayCommand) ---- startTest ----
> frysk.expunit.Expect@219d38 new /dev/pts/3 pid 7551 args [/home/ajocksch/build/frysk/frysk-core/frysk/bindir/fhpd, /home/ajocksch/build/frysk/frysk-core/frysk/pkglibdir/funit-rt-varchange]
> frysk.expunit.Expect@219d38 find <<\(fhpd\) >> in <<>>?
> frysk.expunit.Expect@219d38 poll for 5000 milliseconds
> frysk.expunit.Expect@219d38 poll -> <<Attached to process 7554
> (fhpd) >> giving <<Attached to process 7554
> (fhpd) >>
> frysk.expunit.Expect@219d38 find <<\(fhpd\) >> in <<Attached to process 7554
> (fhpd) >>?
> frysk.expunit.Expect@219d38 match <<(fhpd) >>
> frysk.expunit.Expect@219d38 send <<break #funit-rt-varchange.c#53
>   
> frysk.expunit.Expect@219d38 find <<breakpoint.*\(fhpd\) >> in <<>>?
> frysk.expunit.Expect@219d38 poll for 5000 milliseconds
> frysk.expunit.Expect@219d38 poll -> <<break #funit-rt->> giving <<break #funit-rt->>
> frysk.expunit.Expect@219d38 find <<breakpoint.*\(fhpd\) >> in <<break #funit-rt->>?
> frysk.expunit.Expect@219d38 poll for 5000 milliseconds
> frysk.expunit.Expect@219d38 poll -> <<varchange.c#53
>   
>>> giving <<break #funit-rt-varchange.c#53
>>>
>>>       
> frysk.expunit.Expect@219d38 find <<breakpoint.*\(fhpd\) >> in <<break #funit-rt-varchange.c#53
>   
>>> ?
>>>