Interesting, a mysterious bug report I've been struggling to track down just got solved. It turns out, 32-bit getcontext() can return failure if run inside a docker container. Apparently the cause is the default docker seccomp policy doesn't allow sigprocmask() (wtf?). 
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Replying to @taviso
Sigprocmask is deprecated, therefore denied by the seccomp policy. The 64 bit version uses the newer rt_sigprocmask.
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Replying to @OmriKurtz
It may be deprecated, but it's still used by glibc. I don't think it's okay to break glibc.
1:32 PM - 28 Aug 2019
0 replies
0 retweets
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