gdb problem

Ken Brown
Sun Oct 23 21:48:00 GMT 2011

On 10/23/2011 3:04 PM, Christopher Faylor wrote:
> On Sat, Oct 22, 2011 at 04:37:55PM -0400, Ken Brown wrote:
>> The attached testcase illustrates a problem with `gdb -i=mi'.  I've
>> tested both gdb 7.3.50-1 and 7.3.50-2, with cygwin 1.7.9 as well as with
>> several recent snapshots (including 2011-10-22).
>> Under some circumstances, if gdb -i=mi is started and given several
>> input lines at once, it only prints part of the output before stopping.
>>   I've been able to reproduce this once in a while while working
>> interactively (by copying and pasting the whole bunch of input lines);
>> in this case one can press Return to get the rest of the output.  But
>> the problem happens consistently with the attached test case, which runs
>> gdb in a subprocess.  One has to kill the gdb process before the main
>> program exits.
>> The STC runs as expected on Linux.
> Thanks for the STC.  I had to tweak it to actually see how it was supposed
> to work on Linux since only a limited number of lines from the pty were
> being output.  I've included the revised test case below.
> I made a simple change to Cygwin which will probably cause subtle
> problems somewhere down the line.  At least for now it seems to make gdb
> operate as expected.
> I'm building a new snapshot now.

Thanks, that fixes it (as well as the emacs problem that originally led 
to this report).  In case there are emacs users wondering what this is 
about, I've been testing emacs-24, which uses gdb -i=mi instead of the 
obsolete gdb --annotate=3 used by emacs-23.


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