Public bug reported:
pthread_join() appears to behave differently depending on gcc
optimization is on or off. Build the attached source file with gcc -O2
or gcc -O0 has shown different joining results.
E.g., with `gcc pthread_join.c -lpthread -g -O2` it passes without
issue.
with `gcc pthread_join.c -lpthread -g -O0`, the program fails at
pthread_join() with ESRCH.
The same does not happen on other distros (tested on CentOS and Fedora).
Some additional info:
[macbeth@tests]$cat /etc/issue
Ubuntu 14.04 LTS \n \l
[macbeth@tests]$gcc --version
gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
[macbeth@tests]$dpkg -l libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version
Architecture Description
+++-======================================-========================-========================-==================================================================================
ii libc6:amd64 2.19-0ubuntu6 amd64
Embedded GNU C Library: Shared libraries
** Affects: glibc (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "test program"
https://bugs.launchpad.net/bugs/1427981/+attachment/4334048/+files/pthread_join.c
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https://bugs.launchpad.net/bugs/1427981
Title:
pthread_join failure
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