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Re: Dynamic modules: MODULE_HANDLE_SIGNALS etc.

From: Paul Eggert
Subject: Re: Dynamic modules: MODULE_HANDLE_SIGNALS etc.
Date: Sun, 3 Jan 2016 17:05:05 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0

Daniel Colascione wrote:
The quick and dirty fix for Fdo_auto_save is to run
Fdo_auto_save in a forked child, where it's less likely to hurt
something, and put a limit on the time we're prepared to spend waiting
for that child.

fork isn't async-signal-unsafe in glibc, so it's not clear this is safer there. Also, even assuming POSIX compliance, suppose a library establishes an async-signal-unsafe handler via pthread_atfork? Either way, although the quick-and-dirty fix could be better than what we have now, it also could be worse.



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