THR: Test FAILED - conformance/interfaces/pthread_rwlock_rdlock/4-1.test

[cocobean]

Test pthread_rwlock_rdlock(pthread_rwlock_t * rwlock)

If a signal is delivered to a thread waiting for a read-write lock for reading, upon return from the signal handler the thread resumes waiting for the read-write lock for reading as if it was not interrupted.

Steps:

1. main thread  create read-write lock 'rwlock', and lock it for writing
2. main thread create a thread sig_thread, the thread is set to handle SIGUSR1
3. sig_thread try to lock 'rwlock' for reading but will block
4. main thread sends SIGUSR1 to sig_thread via pthread_kill
5. test that thread handler is called 
6. check that when thread handler returns, sig_thread resumes blocking for rwlock
7. main thread unlock 'rwlock', sig_thread should get the lock

Ref: ​https://github.com/haiku/open_posix_testsuite/blob/from_haiku_trunk/conformance/interfaces/pthread_rwlock_rdlock/4-1.c

Expected result: Test passed

Actual Result: Test failed. sig_thread: Error at pthread_rwlock_rdlock(). Error code=2147483638

Tested on: Haiku hrev54815 x86 with Open POSIX Test Suite 1.5.2

[waddlesplash]

Fixed in hrev58065 +beta5.