diff options
Diffstat (limited to 'nptl/pthread_rwlock_rdlock.c')
| -rw-r--r-- | nptl/pthread_rwlock_rdlock.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/nptl/pthread_rwlock_rdlock.c b/nptl/pthread_rwlock_rdlock.c index 4aa1c5bb59..14688e2981 100644 --- a/nptl/pthread_rwlock_rdlock.c +++ b/nptl/pthread_rwlock_rdlock.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2003,2004,2007,2011 Free Software Foundation, Inc. +/* Copyright (C) 2003-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003. @@ -21,6 +21,7 @@ #include <lowlevellock.h> #include <pthread.h> #include <pthreadP.h> +#include <stap-probe.h> /* Acquire read lock for RWLOCK. */ @@ -30,6 +31,8 @@ __pthread_rwlock_rdlock (rwlock) { int result = 0; + LIBC_PROBE (rdlock_entry, 1, rwlock); + /* Make sure we are alone. */ lll_lock (rwlock->__data.__lock, rwlock->__data.__shared); @@ -48,6 +51,8 @@ __pthread_rwlock_rdlock (rwlock) --rwlock->__data.__nr_readers; result = EAGAIN; } + else + LIBC_PROBE (rdlock_acquire_read, 1, rwlock); break; } |