From: Stephen Leake <stephen_leake@stephe-leake.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 13303@debbugs.gnu.org
Subject: bug#13303: 24.2.91; gdb under emacs broken for break commands
Date: Sat, 29 Dec 2012 07:31:07 -0500 [thread overview]
Message-ID: <851ue9doqc.fsf@stephe-leake.org> (raw)
In-Reply-To: <83vcbll1bf.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 29 Dec 2012 10:17:24 +0200")
Eli Zaretskii <eliz@gnu.org> writes:
>> M-x gdb
>> Run gdb (like this): gdb -i=mi hello
Forgot to say the gdb version is 7.4.1-1
>> at the gdb prompt, set a breakpoint:
>> break hello.c:4
>>
>> try to set commands:
>> command 1
>>
>> should see a prompt, terminate by 'end'. Instead, see:
>> (gdb) command 1
>> Type commands for breakpoint(s) 1, one per line.
>> End with a line saying just "end".
>
> Aren't the last 2 lines the prompt you expected to see?
Yes, but each following line should be prompted with '>'.
>> p argc
>> end
>> p argc
>> end
>> (gdb)
>>
>> This was terminated by Menu | Signals | EOF
>
> Why did you send EOF?
Because "end" didn't work, and I was trying other things.
> That command causes the debugger to quit, so what's the purpose of
> sending it here?
It does cause it to quit under Windows in this situation, but not under
Debian.
>> On Windows 7, the behavior is slightly different; the '>' prompt is
>> visible, but EOF crashes gdb.
>
> Not really a crash, at least on my XP SP3. It exits after reporting
> some weird error message about stdin, which is expected, since Emacs
> closes the debugger's stdin file descriptor. What kind of "crash" did
> you see on Windows 7?
The same as yours; I agree "crash" is the wrong word.
> Anyway, the annoyance with no "> " prompt on Posix hosts is a known
> problem with GDB versions older than 7.5; see bug#11279. You can work
> around it by typing this command at the first GDB prompt:
>
> (gdb) set interactive-mode off
>
> GDB 7.5 fixed that problem, so upgrading your GDB will remove the need
> to use the above work-around.
That does restore the "> " prompt, but it also restores EOF behavior (it
now quits the debugger).
So the core problem remains: there is no way to terminate prompting
for new command lines, without quiting the debugger.
(I realize I did not state the main problem clearly in my initial
report).
I have not installed gdb 7.5; it's not in Debian testing (that's at gdb
7.4), and it's not supported for my main work, which has an AdaCore
support contract, with gdb 7.3.
--
-- Stephe
next prev parent reply other threads:[~2012-12-29 12:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-29 4:04 bug#13303: 24.2.91; gdb under emacs broken for break commands Stephen Leake
2012-12-29 8:17 ` Eli Zaretskii
2012-12-29 12:31 ` Stephen Leake [this message]
2012-12-29 12:55 ` Eli Zaretskii
2012-12-29 15:28 ` Stephen Leake
2012-12-29 17:19 ` Eli Zaretskii
2012-12-29 18:40 ` Stephen Leake
2012-12-29 18:56 ` Eli Zaretskii
2012-12-29 17:54 ` Eli Zaretskii
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