src/lib/libthr/pthread.map, branch releng/9.1

Introduce a non-portable function pthread_getthreadid_np(3) to retrieve

2011-02-07T21:26:46+00:00

calling thread's unique integral ID, which is similar to AIX function of
the same name.  Bump __FreeBSD_version to note its introduction.

Reviewed by:	kib

Implement the __pthread_map_stacks_exec() for libthr.

2011-01-09T12:38:40+00:00

Stack creation code is changed to call _rtld_get_stack_prot() to get
the stack protection right. There is a race where thread is created
during dlopen() of dso that requires executable stacks. Then,
_rtld_get_stack_prot() may return PROT_READ | PROT_WRITE, but thread
is still not linked into the thread list. In this case, the callback
misses the thread stack, and rechecks the required protection
afterward.

Reviewed by:	davidxu

Revert revision 214007, I realized that MySQL wants to resolve

2010-10-20T02:34:02+00:00

a silly rwlock deadlock problem, the deadlock is caused by writer
waiters, if a thread has already locked a reader lock, and wants to
acquire another reader lock, it will be blocked by writer waiters,
but we had already fixed it years ago.

sort function name.

2010-10-18T05:16:44+00:00

Add pthread_rwlockattr_setkind_np and pthread_rwlockattr_getkind_np, the

2010-10-18T05:09:22+00:00

functions set or get pthread_rwlock type, current supported types are:
   PTHREAD_RWLOCK_PREFER_READER_NP,
   PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
   PTHREAD_RWLOCK_PREFER_WRITER_NP,
default is PTHREAD_RWLOCK_PREFER_WRITER_NONCECURSIVE_NP, this maintains
binary compatible with old code.

To support stack unwinding for cancellation points, add -fexceptions flag

2010-09-25T01:57:47+00:00

for them, two functions _pthread_cancel_enter and _pthread_cancel_leave
are added to let thread enter and leave a cancellation point, it also
makes it possible that other functions can be cancellation points in
libraries without having to be rewritten in libthr.

Update symbol.

2010-09-13T09:23:38+00:00

Add wrapper for setcontext() and swapcontext(), the wrappers

2010-08-24T09:57:06+00:00

unblock SIGCANCEL which is needed by thread cancellation.

On shared object unload, in __cxa_finalize, call and clear all installed

2010-08-23T15:38:02+00:00

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

Remove extra new semaphore stubs, because libc already has them, and

2010-01-05T06:21:29+00:00

ld can find the newest version which is default.

Poked by: kan@