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author | kib <kib@FreeBSD.org> | 2010-08-23 15:38:02 +0000 |
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committer | kib <kib@FreeBSD.org> | 2010-08-23 15:38:02 +0000 |
commit | df9bc4850f3a6aef289d53c0c3d1fc78d63bdda2 (patch) | |
tree | 509be3ad57df8011e952d3da4691f43abd346d2e /lib/libthr/pthread.map | |
parent | 7ca1c6f40abcb8550b7bbf0c67ceb3a73d93b342 (diff) | |
download | FreeBSD-src-df9bc4850f3a6aef289d53c0c3d1fc78d63bdda2.zip FreeBSD-src-df9bc4850f3a6aef289d53c0c3d1fc78d63bdda2.tar.gz |
On shared object unload, in __cxa_finalize, call and clear all installed
atexit and __cxa_atexit handlers that are either installed by unloaded
dso, or points to the functions provided by the dso.
Use _rtld_addr_phdr to locate segment information from the address of
private variable belonging to the dso, supplied by crtstuff.c. Provide
utility function __elf_phdr_match_addr to do the match of address against
dso executable segment.
Call back into libthr from __cxa_finalize using weak
__pthread_cxa_finalize symbol to remove any atfork handler which
function points into unloaded object.
The rtld needs private __pthread_cxa_finalize symbol to not require
resolution of the weak undefined symbol at initialization time. This
cannot work, since rtld is relocated before sym_zero is set up.
Idea by: kan
Reviewed by: kan (previous version)
MFC after: 3 weeks
Diffstat (limited to 'lib/libthr/pthread.map')
-rw-r--r-- | lib/libthr/pthread.map | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/libthr/pthread.map b/lib/libthr/pthread.map index 6460bec..8457996 100644 --- a/lib/libthr/pthread.map +++ b/lib/libthr/pthread.map @@ -192,6 +192,7 @@ FBSDprivate_1.0 { __poll; __pthread_cond_timedwait; __pthread_cond_wait; + __pthread_cxa_finalize; __pthread_mutex_init; __pthread_mutex_lock; __pthread_mutex_timedlock; |