Can Signal Handler be executed before establishing it's handler ? How is it possible?

Asked Dec 23 '18 at 18:42

Active Dec 25 '18 at 19:53

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Can Signal Handler be executed before establishing it's handler ? How is it possible ?

Why behavior is undefined if : thread 'A' is calling sigsetjmp and establishing signal handler for SIGALRM. then thread 'A' is interrupted by SIGALRM, then signal handler is executed by another thread 'B' who is calling siglongjmp.

edited Dec 25 '18 at 19:53

asked Dec 23 '18 at 18:42

anoop mourya

I don't think it is undefined behavior: https://stackoverflow.com/a/30761135/530160 – Nick ODell Dec 23 '18 at 20:57
Can you show us some sample code and a reference that says it's exhibiting undefined behaviour? Then we'll be better able to answer your question. – Mark Plotnick Jan 02 '19 at 16:05

Can Signal Handler be executed before establishing it's handler ? How is it possible?

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