gdb pty problem [Was: emacs gud-interface is not updated after gdb command execution (maybe because of incomplete output from gdb)]
Ken Brown
kbrown@cornell.edu
Wed Jun 1 19:05:00 GMT 2016
On 6/1/2016 2:28 PM, Corinna Vinschen wrote:
> On Jun 1 11:22, Ken Brown wrote:
>> On 6/1/2016 10:33 AM, Ken Brown wrote:
>>> On 6/1/2016 10:28 AM, Corinna Vinschen wrote:
>>>> Hi Ken,
>>>>
>>>> On Jun 1 09:02, Ken Brown wrote:
>>>>> On 6/1/2016 8:51 AM, Ken Brown wrote:
>>>>>> On 5/31/2016 5:41 AM, Corinna Vinschen wrote:
>>>>>>> Any chance you could bisect Cygwin to help finding the culprit?
>>>>>>
>>>>>> The culprit is
>>>>>>
>>>>>> commit 252a07b0ad3353abcd0fcd9b1b65ff977acd679e
>>>>>> Author: Takashi Yano <takashi.yano@nifty.ne.jp>
>>>>>> Date: Fri Apr 3 13:07:35 2015 +0900
>>>>>>
>>>>>> Cygwin hangs up if several keys are typed during outputting a lot of
>>>>>> texts.
>>>>>>
>>>>>> * fhandler_tty.cc (fhandler_pty_slave::read): Change
>>>>>> calculation of
>>>>>> "readlen" not to use "bytes_in_pipe" value directly.
>>>>>>
>>>>>>
>>>>>> Reverting that commit fixes the problem.
>>>>>
>>>>> Unfortunately, all kinds of other things break. For example, emacs
>>>>> exits
>>>>> immediately, ls produces no output,....
>>>>
>>>> Are you sure? I just tried it myself and ls as well as emacs work
>>>> fine for me.
>>>
>>> It works for me now too. I must have done something wrong the first
>>> time I tried.
>>
>> And this also fixes the original problem in emacs that started the thread:
>>
>> https://www.cygwin.com/ml/cygwin/2016-05/msg00318.html
>
> I reverted commit 252a07b0ad3353abcd0fcd9b1b65ff977acd679e in git master
> for now, unless we find a reason to rework this again.
Thanks. By the way, I'd like to take the opportunity to thank Peter
Castro for the Cygwin Time Machine
(http://www.fruitbat.org/Cygwin/#cygwintimemachine). The bisection I
did, spanning a period of about 4 years, would have been virtually
impossible without it.
Ken
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