Add weak aliases for methods used by the new jemalloc. Co-opt the mutex
catchall for now for it.

lib: remove CONSTCOND comment

Since 2021-01-31, lint doesn't need it anymore for the common pattern of
'do ... while (0)'.

change libc sched_yield() stub to actually still call the syscall
instead of doing nothing when app is not linked with pthread; this matches
other systems

suggested by Mateusz Guzik in:
http://mail-

change libc sched_yield() stub to actually still call the syscall
instead of doing nothing when app is not linked with pthread; this matches
other systems

suggested by Mateusz Guzik in:
http://mail-index.netbsd.org/tech-kern/2020/07/19/msg026620.html

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Adjust the error return value of pthread_sigmask for !libpthread usage

Instead of returning -1, return errno on error.

Catch up after the fix in libpthread by Andrew Doran in 2008
in lib/libpthread

Adjust the error return value of pthread_sigmask for !libpthread usage

Instead of returning -1, return errno on error.

Catch up after the fix in libpthread by Andrew Doran in 2008
in lib/libpthread/pthread_misc.c r.1.9.

It's an open question whether this function shall be used without linked
in the POSIX thread library.

Detected by Bruno Haible (GNU) and documented in gnulib in commit
"pthread_sigmask: Avoid test failure on NetBSD 8.0. " r. 4d16a83b0c1fcb6c.

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Transfer all the keys that were created in the libc stub implementation
to the pthread tsd implementation when the main thread is created.
This corrects a problem where a process created keys before

Transfer all the keys that were created in the libc stub implementation
to the pthread tsd implementation when the main thread is created.
This corrects a problem where a process created keys before libpthread
was loaded (either from the libc constructor or because libpthread
was dlopened later). This fixes a problem with jemalloc which creates
keys in the constructor.

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Add CHECK_NOT_THREADED() in __libc_mutexattr_settype_stub()

This makes this function consistent with __libc_mutex_catchall_stub()
and others in the same group.

Approved by <christos>.

mark __libc_thr_exit_stub dead here too

Provide stubs for pthread_detach/pthread_join.

Weak alias directly to the catchall stub and don't strong alias twice.

split init and errno to a separate file. No point in growing rtld 10K.

- Allow libpthread to be dlopened again, by providing libc stubs to libpthread.
- Fail if the dlopened libpthread does pthread_create(). From manu@
- Discussed at length in the mailing lists; approve

- Allow libpthread to be dlopened again, by providing libc stubs to libpthread.
- Fail if the dlopened libpthread does pthread_create(). From manu@
- Discussed at length in the mailing lists; approved by core@
- This was chosen as the least intrusive patch that will provide
the necessary functionality.
XXX: pullup to 6

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Use __dead

Make threaded programs die correctly:

kill(getpid(), SIGFOO) -> raise(SIGFOO)

Remove clause 3 and 4 from TNF licenses

add fw decl.

fix obvious bogon [can't alias symbol to itself]

Add thr_curcpu(), pthread_curcpu_np().

Add pthread_equal() to libc stubs; this makes a lot of sense for
threadsafe libraries implementing own locking functions.
Ride on yesterday's minor version bumps.

- stack_protector.c doesn't really belong under sys/. Add a new directory
for misc support routines and put it there.
- Add a libc constructor. Use this to initialize threading and the
stack prot

- stack_protector.c doesn't really belong under sys/. Add a new directory
for misc support routines and put it there.
- Add a libc constructor. Use this to initialize threading and the
stack protector stuff. libpthread cannot be initialized safely using
its own constructor because libc and libpthread are deeply intertwined.
PR bin/37347

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WARNS=4

Add missing __RCSID()

Fix the __libc_thr_yield_stub() signature.

The __libc_thr_yield_stub() for scched_yield() should return int (and
a 0), not void.

Implement __libc_thr_sigsetmask_stub() in terms of sigprocmask(),
instead of having a dummy function.

Add a stub for setcancelstate().