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Re: Debugging sub-processes with gdb

Christopher Faylor writes:

> On Wed, May 14, 2014 at 04:10:36PM +0100, Henry S. Thompson wrote:
>>I'm trying to debug a problem with xemacs that involves the child
>>process forked when you execute M-x shell.
>>None of the mechanisms in the gdb documentation for choosing to step
>>into the child process (instead of the parent) after a fork() seem to
>>work for me.  That is, in particular, setting follow-for-mode to child
>>still leaves me in the parent after stepping over a fork().
>>Setting detach-on-fork to 'off' also seems to have no effect.
>>Have I misunderstood something, or does this aspect of gdb just not
>>work under cygwin (x86_64, 1.7.29-2)?
> Debugging subprocesses doesn't work for Windows gdb.  Sorry.

Thanks for confirming.

> If you have control over the code you could have it print a pid, wait,
> and then attach to it with gdb.  That works.

Understood, will do.

       Henry S. Thompson, School of Informatics, University of Edinburgh
      10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440
                Fax: (44) 131 650-4587, e-mail:
 [mail from me _always_ has a .sig like this -- mail without it is forged spam]

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