git: libc/libthread_xu - Fix segfault caused by libpthread used before initialised
Markus Pfeiffer
profmakx at crater.dragonflybsd.org
Thu Mar 21 16:44:54 PDT 2013
commit a809fd3908a7e5b67c1132990fcecf9eb355dc54
Author: Markus Pfeiffer <markus.pfeiffer at morphism.de>
Date: Mon Mar 18 21:46:24 2013 +0000
libc/libthread_xu - Fix segfault caused by libpthread used before initialised
If a binary has libpthread as dependency and is linked against libintl,
or any other library that uses pthread locking primitives from libc
without depending on libpthread itself it can happen that functions
from libpthread are called before libpthread's constructor has been
called. This leads to a segfault.
This fix adds a weak symbold to libc, namely _pthread_init_early,
which is called from a libc constructor function and therefore makes
sure that libpthread is initialised early enough.
Thanks to Simon Schubert, Angelos Oikonomopoulos, and Sascha Wildner
for the support in debugging this.
Summary of changes:
lib/libc/gen/_pthread_stubs.c | 17 +++++++++++++++++
lib/libthread_xu/thread/thr_init.c | 15 +++++++++++++++
2 files changed, 32 insertions(+)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/a809fd3908a7e5b67c1132990fcecf9eb355dc54
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