[patch] Add tests for atexit/on_exit firing order

[Paul Pluzhnikov <ppluzhnikov at google dot com>]

Greetings,

While working a on patch for bz14333, I discovered that there are no
tests for ordering of functions registered with atexit/on_exit, and in
particular the case where such function itself registers new exit
handlers.

This patch adds such test. I am using on_exit here because it
conveniently allows passing an argument.


2017-07-10  Paul Pluzhnikov  <ppluzhnikov@google.com>

        * stdlib/Makefile (tests): Add tst-on_exit
        * stdlib/tst-on_exit.c: New.


-- 
Paul Pluzhnikov

Attachment: glibc-on_exit-20170710.txt
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