y2038: nptl: Convert sem_{clock|timed}wait to support 64 bit time

The sem_clockwait and sem_timedwait have been converted to support 64 bit time.

This change reuses futex_abstimed_wait_cancelable64 function introduced earlier.
The sem_{clock|timed}wait only accepts absolute time. Moreover, there is no
need to check for NULL passed as *abstime pointer to the syscalls as both calls
have exported symbols marked with __nonull attribute for abstime.

For systems with __TIMESIZE != 64 && __WORDSIZE == 32:
- Conversion from 32 bit time to 64 bit struct __timespec64 was necessary
- Redirection to __sem_{clock|timed}wait64 will provide support for 64 bit
  time

Build tests:
./src/scripts/build-many-glibcs.py glibcs

Run-time tests:
- Run specific tests on ARM/x86 32bit systems (qemu):
  https://github.com/lmajewski/meta-y2038 and run tests:
  https://github.com/lmajewski/y2038-tests/commits/master

Above tests were performed with Y2038 redirection applied as well as without
to test the proper usage of both __sem_{clock|timed}wait64 and
__sem_{clock|timed}wait.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/nptl/sem_wait.c b/nptl/sem_wait.c
index 171716fdbc..9374e0aaf6 100644
--- a/nptl/sem_wait.c
+++ b/nptl/sem_wait.c
@@ -18,6 +18,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <lowlevellock.h>	/* lll_futex* used by the old code.  */
+#include "semaphoreP.h"
 #include "sem_waitcommon.c"
 
 int
@@ -39,8 +40,8 @@ __new_sem_wait (sem_t *sem)
   if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
     return 0;
   else
-    return __new_sem_wait_slow ((struct new_sem *) sem,
-				CLOCK_REALTIME, NULL);
+    return __new_sem_wait_slow64 ((struct new_sem *) sem,
+				  CLOCK_REALTIME, NULL);
 }
 versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1);