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bug#17561: Emacs can forget processes

From: Paul Eggert
Subject: bug#17561: Emacs can forget processes
Date: Tue, 27 May 2014 17:47:41 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

Jorgen Schaefer wrote:
No output.

Ouch. It sounds like we may be barking up the wrong tree with the assumption that there is a kernel bug with vfork, then. It could be that it's just an strace bug.

I'm still suspicious of the interaction between pthread_sigmask and vfork, though. What happens if you do the following shell session, where "$" is the shell prompt and "(gdb)" is the GDB prompt?

$ grep -i pthread src/config.h
$ ldd src/bootstrap-emacs | grep -i pthread
$ gdb src/bootstrap-emacs
(gdb) disas rpl_pthread_sigmask
(gdb) disas pthread_sigmask
(gdb) disas rpl_vfork
(gdb) disas vfork
(gdb) disas rpl_fork
(gdb) disas fork

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