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| author | Martin von Gagern <Martin.vGagern@gmx.net> | 2011-05-14 21:25:43 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-05-14 21:25:43 -0400 |
| commit | d26dfc60edc8c6dd160eefff16a734152a835ca0 (patch) | |
| tree | 0d0e1a3caa1f5edd8fc27a8a4715fc1052740c7e /ChangeLog | |
| parent | a79a1c704b32c48903a4cb4c0786eca828520b5c (diff) | |
| download | glibc-d26dfc60edc8c6dd160eefff16a734152a835ca0.tar.xz glibc-d26dfc60edc8c6dd160eefff16a734152a835ca0.zip | |
Fix handling of static TLS in dlopen'ed objects
When dynamically loading a library along with several dependencies, calls to
_dl_add_to_slotinfo and _dl_update_slotinfo can become intermixed. As a
consequence, _dl_update_slotinfo will update the generation counter of the dtv
although not all of the slots belonging to that generation have been added.
Subsequent calls to _dl_add_to_slotinfo will add more slots to the same
generation, for which no storage will be allocated, as the dtv generation
checks will claim no work is necessary. This will lead to uninitialized dtv
entries and will likely cause a SIGSEGV when thread local variables are
accessed.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -1,5 +1,15 @@ 2011-05-14 Ulrich Drepper <drepper@gmail.com> + [BZ #12453] + * elf/dl-open.c (dl_open_worker): Delay calls to _dl_update_slotinfo + until all modules are registered in the DTV. + * elf/Makefile: Add rules to build and run tst-tls19. + * elf/tst-tls19.c: New file. + * elf/tst-tls19mod1.c: New file. + * elf/tst-tls19mod2.c: New file. + * elf/tst-tls19mod3.c: New file. + Patch mostly by Martin von Gagern <Martin.vGagern@gmx.net>. + [BZ #12083] * sysdeps/pthread/aio_misc.c (__aio_init): Compute optim.aio_num correctly. |