Add systemtap static probe points in generic and x86_64 pthread code.

nptl/ChangeLog

@@ -1,3 +1,32 @@
+2012-05-25  Rayson Ho  <rho@redhat.com>
+	    Roland McGrath  <roland@hack.frob.com>
+
+	* DESIGN-systemtap-probes.txt: New file.
+	* pthread_cond_broadcast.c: SystemTap probes.
+	* pthread_cond_init.c: Likewise.
+	* pthread_cond_signal.c: Likewise.
+	* pthread_cond_wait.c: Likewise.
+	* pthread_cond_destroy.c: Likewise.
+	* pthread_create.c: Likewise.
+	* pthread_join.c: Likewise.
+	* pthread_mutex_destroy.c: Likewise.
+	* pthread_mutex_init.c: Likewise.
+	* pthread_mutex_lock.c: Likewise.
+	* pthread_mutex_timedlock.c: Likewise.
+	* pthread_mutex_unlock.c: Likewise.
+	* pthread_rwlock_destroy.c: Likewise.
+	* pthread_rwlock_rdlock.c: Likewise.
+	* pthread_rwlock_unlock.c: Likewise.
+	* pthread_rwlock_wrlock.c: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S: Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S: Likewise.
+
 2012-05-24  Roland McGrath  <roland@hack.frob.com>
 
 	* pthread_create.c (start_thread): Define pthread_start LIBC_PROBE.

nptl/DESIGN-systemtap-probes.txt

@@ -0,0 +1,89 @@
+Systemtap is a dynamic tracing/instrumenting tool available on Linux. Probes
+that are not fired at run time have close to zero overhead.
+
+The following probes are available for NPTL:
+
+Thread creation & Join Probes
+=============================
+pthread_create - probe for pthread_create
+               arg1 = pointer (pthread_t*) to thread
+               arg2 = pointer (pthread_attr_t*) to attr
+               arg3 = pointer (void *) to start_routine
+               arg4 = arguments to start_routine
+pthread_start - probe for actual thread creation
+              arg1 = struct pthread (members include thread ID, process ID)
+              arg2 = address of start_routine
+              arg3 = pointer to the list of arguments
+pthread_join - probe for pthread_join
+             arg1 = thread ID
+pthread_join_ret - probe for pthread_join return
+                 arg1 = thread ID
+                 arg2 = return value
+
+Lock-related Probes
+===================
+mutex_init    - probe for pthread_mutex_init
+              arg1 = address of mutex lock
+mutex_acquired - probe for succ. return of pthread_mutex_lock
+               arg1 = address of mutex lock
+mutex_timedlock_acquired - probe for succ. return of pthread_mutex_timedlock
+                         arg1 = address of mutex lock
+mutex_entry   - probe for entry to the pthread_mutex_lock function
+              arg1 = address of mutex lock
+mutex_timedlock_entry - probe for entry to the pthread_mutex_timedlock function
+                      arg1 = address of mutex lock, arg2 = address of timespec
+mutex_release - probe for pthread_mutex_unlock after the successful release of a
+                mutex lock
+              arg1 = address of mutex lock
+mutex_destroy - probe for pthread_mutex_destroy
+              arg1 = address of mutex lock
+
+wrlock_entry - probe for entry to the pthread_rwlock_wrlock function
+             arg1 = address of rw lock
+rdlock_entry - probe for entry to the pthread_rwlock_rdlock function
+             arg1 = address of rw lock
+
+rwlock_destroy - probe for pthread_rwlock_destroy
+               arg1 = address of rw lock
+wrlock_acquire_write - probe for pthread_rwlock_wrlock (after getting the lock)
+                     arg1 = address of rw lock
+rdlock_acquire_read - probe for pthread_rwlock_rdlock after successfully getting
+                      the lock
+                    arg1 = address of rw lock
+rwlock_unlock - probe for pthread_rwlock_unlock
+              arg1 = address of rw lock
+
+lll_lock_wait - probe in low-level (assembly language) locking code, only fired
+                when futex/FUTEX_WAIT is called (i.e. when trying to acquire a
+                contented lock)
+              arg1 = pointer to futex
+              arg2 = flags passed to the futex system call
+lll_lock_wait_private - probe in low-level (assembly language) locking code,
+                        only fired when futex/FUTEX_WAIT is called (i.e. when
+                        trying to acquire a contented lock)
+                      arg1 = pointer to futex
+
+lll_futex_wake - probe in low-level (assembly language) locking code, only fired
+                 when futex (FUTEX_WAKE) is called
+               arg1 = pointer to futex
+               arg2 = number of processes to wake
+               arg3 = additional flags
+
+Condition variable Probes
+=========================
+cond_init - probe for pthread_cond_init
+          arg1 = condition
+          arg2 = attr
+cond_destroy - probe for pthread_cond_destroy
+             arg1 = cond
+cond_wait - probe for pthread_cond_wait
+          arg1 = condition
+          arg2 = mutex lock
+cond_timedwait - probe for pthread_cond_timedwait
+               arg1 = condition
+               arg2 = mutex lock
+               arg3 = timespec
+cond_signal - probe for pthread_cond_signal
+            arg1 = condition
+cond_broadcast - probe for pthread_cond_broadcast
+               arg1 = condition

nptl/pthread_cond_broadcast.c

@@ -22,6 +22,7 @@
 #include <lowlevellock.h>
 #include <pthread.h>
 #include <pthreadP.h>
+#include <stap-probe.h>
 
 #include <shlib-compat.h>
 #include <kernel-features.h>
@@ -31,6 +32,8 @@ int
 __pthread_cond_broadcast (cond)
      pthread_cond_t *cond;
 {
+  LIBC_PROBE (cond_broadcast, 1, cond);
+
   int pshared = (cond->__data.__mutex == (void *) ~0l)
 		? LLL_SHARED : LLL_PRIVATE;
   /* Make sure we are alone.  */

nptl/pthread_cond_destroy.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -19,6 +19,7 @@
 #include <errno.h>
 #include <shlib-compat.h>
 #include "pthreadP.h"
+#include <stap-probe.h>
 
 
 int
@@ -28,6 +29,8 @@ __pthread_cond_destroy (cond)
   int pshared = (cond->__data.__mutex == (void *) ~0l)
 		? LLL_SHARED : LLL_PRIVATE;
 
+  LIBC_PROBE (cond_destroy, 1, cond);
+
   /* Make sure we are alone.  */
   lll_lock (cond->__data.__lock, pshared);
 
@@ -50,13 +53,13 @@ __pthread_cond_destroy (cond)
   if (nwaiters >= (1 << COND_NWAITERS_SHIFT))
     {
       /* Wake everybody on the associated mutex in case there are
-         threads that have been requeued to it.
+	 threads that have been requeued to it.
-         Without this, pthread_cond_destroy could block potentially
+	 Without this, pthread_cond_destroy could block potentially
-         for a long time or forever, as it would depend on other
+	 for a long time or forever, as it would depend on other
-         thread's using the mutex.
+	 thread's using the mutex.
-         When all threads waiting on the mutex are woken up, pthread_cond_wait
+	 When all threads waiting on the mutex are woken up, pthread_cond_wait
-         only waits for threads to acquire and release the internal
+	 only waits for threads to acquire and release the internal
-         condvar lock.  */
+	 condvar lock.  */
       if (cond->__data.__mutex != NULL
 	  && cond->__data.__mutex != (void *) ~0l)
 	{

nptl/pthread_cond_init.c

@@ -1,5 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
-   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -19,6 +18,7 @@
 
 #include <shlib-compat.h>
 #include "pthreadP.h"
+#include <stap-probe.h>
 
 
 int
@@ -41,6 +41,8 @@ __pthread_cond_init (cond, cond_attr)
 			  ? NULL : (void *) ~0l);
   cond->__data.__broadcast_seq = 0;
 
+  LIBC_PROBE (cond_init, 2, cond, cond_attr);
+
   return 0;
 }
 versioned_symbol (libpthread, __pthread_cond_init,

nptl/pthread_cond_signal.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004, 2007 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.
 
@@ -25,6 +25,7 @@
 
 #include <shlib-compat.h>
 #include <kernel-features.h>
+#include <stap-probe.h>
 
 
 int
@@ -34,6 +35,8 @@ __pthread_cond_signal (cond)
   int pshared = (cond->__data.__mutex == (void *) ~0l)
 		? LLL_SHARED : LLL_PRIVATE;
 
+  LIBC_PROBE (cond_signal, 1, cond);
+
   /* Make sure we are alone.  */
   lll_lock (cond->__data.__lock, pshared);
 

nptl/pthread_cond_wait.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2003,2004,2006,2007,2011 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.
 
@@ -24,6 +24,7 @@
 #include <pthreadP.h>
 
 #include <shlib-compat.h>
+#include <stap-probe.h>
 
 
 struct _condvar_cleanup_buffer
@@ -43,7 +44,7 @@ __condvar_cleanup (void *arg)
     (struct _condvar_cleanup_buffer *) arg;
   unsigned int destroying;
   int pshared = (cbuffer->cond->__data.__mutex == (void *) ~0l)
-  		? LLL_SHARED : LLL_PRIVATE;
+		? LLL_SHARED : LLL_PRIVATE;
 
   /* We are going to modify shared data.  */
   lll_lock (cbuffer->cond->__data.__lock, pshared);
@@ -98,7 +99,9 @@ __pthread_cond_wait (cond, mutex)
   struct _condvar_cleanup_buffer cbuffer;
   int err;
   int pshared = (cond->__data.__mutex == (void *) ~0l)
-  		? LLL_SHARED : LLL_PRIVATE;
+		? LLL_SHARED : LLL_PRIVATE;
+
+  LIBC_PROBE (cond_wait, 2, cond, mutex);
 
   /* Make sure we are alone.  */
   lll_lock (cond->__data.__lock, pshared);

nptl/pthread_create.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2007,2008,2009,2010,2011 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -560,6 +560,8 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
   /* Pass the descriptor to the caller.  */
   *newthread = (pthread_t) pd;
 
+  LIBC_PROBE (pthread_create, 4, newthread, attr, start_routine, arg);
+
   /* Start the thread.  */
   return create_thread (pd, iattr, STACK_VARIABLES_ARGS);
 }

nptl/pthread_join.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -22,6 +22,8 @@
 #include <atomic.h>
 #include "pthreadP.h"
 
+#include <stap-probe.h>
+
 
 static void
 cleanup (void *arg)
@@ -54,6 +56,8 @@ pthread_join (threadid, thread_return)
   struct pthread *self = THREAD_SELF;
   int result = 0;
 
+  LIBC_PROBE (pthread_join, 1, threadid);
+
   /* During the wait we change to asynchronous cancellation.  If we
      are canceled the thread we are waiting for must be marked as
      un-wait-ed for again.  */
@@ -109,5 +113,7 @@ pthread_join (threadid, thread_return)
       __free_tcb (pd);
     }
 
+  LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd->result);
+
   return result;
 }

nptl/pthread_mutex_destroy.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -19,11 +19,15 @@
 #include <errno.h>
 #include "pthreadP.h"
 
+#include <stap-probe.h>
+
 
 int
 __pthread_mutex_destroy (mutex)
      pthread_mutex_t *mutex;
 {
+  LIBC_PROBE (mutex_destroy, 1, mutex);
+
   if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0
       && mutex->__data.__nusers != 0)
     return EBUSY;

nptl/pthread_mutex_init.c

@@ -1,5 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
-   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,6 +22,8 @@
 #include <kernel-features.h>
 #include "pthreadP.h"
 
+#include <stap-probe.h>
+
 static const struct pthread_mutexattr default_attr =
   {
     /* Default is a normal mutex, not shared between processes.  */
@@ -134,6 +135,8 @@ __pthread_mutex_init (mutex, mutexattr)
   // mutex->__spins = 0;	already done by memset
   // mutex->__next = NULL;	already done by memset
 
+  LIBC_PROBE (mutex_init, 1, mutex);
+
   return 0;
 }
 strong_alias (__pthread_mutex_init, pthread_mutex_init)

nptl/pthread_mutex_lock.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2007, 2008, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,6 +23,7 @@
 #include <not-cancel.h>
 #include "pthreadP.h"
 #include <lowlevellock.h>
+#include <stap-probe.h>
 
 
 #ifndef LLL_MUTEX_LOCK
@@ -47,6 +48,9 @@ __pthread_mutex_lock (mutex)
   assert (sizeof (mutex->__size) >= sizeof (mutex->__data));
 
   unsigned int type = PTHREAD_MUTEX_TYPE (mutex);
+
+  LIBC_PROBE (mutex_entry, 1, mutex);
+
   if (__builtin_expect (type & ~PTHREAD_MUTEX_KIND_MASK_NP, 0))
     return __pthread_mutex_lock_full (mutex);
 
@@ -126,6 +130,8 @@ __pthread_mutex_lock (mutex)
   ++mutex->__data.__nusers;
 #endif
 
+  LIBC_PROBE (mutex_acquired, 1, mutex);
+
   return 0;
 }
 
@@ -466,6 +472,8 @@ __pthread_mutex_lock_full (pthread_mutex_t *mutex)
   ++mutex->__data.__nusers;
 #endif
 
+  LIBC_PROBE (mutex_acquired, 1, mutex);
+
   return 0;
 }
 #ifndef __pthread_mutex_lock

nptl/pthread_mutex_timedlock.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2007, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,6 +23,8 @@
 #include <lowlevellock.h>
 #include <not-cancel.h>
 
+#include <stap-probe.h>
+
 
 int
 pthread_mutex_timedlock (mutex, abstime)
@@ -33,6 +35,8 @@ pthread_mutex_timedlock (mutex, abstime)
   pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
   int result = 0;
 
+  LIBC_PROBE (mutex_timedlock_entry, 2, mutex, abstime);
+
   /* We must not check ABSTIME here.  If the thread does not block
      abstime must not be checked for a valid value.  */
 
@@ -171,6 +175,8 @@ pthread_mutex_timedlock (mutex, abstime)
 
 		  ++mutex->__data.__count;
 
+		  LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+
 		  return 0;
 		}
 	    }
@@ -241,6 +247,8 @@ pthread_mutex_timedlock (mutex, abstime)
 
 		++mutex->__data.__count;
 
+		LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+
 		return 0;
 	      }
 	  }
@@ -376,6 +384,8 @@ pthread_mutex_timedlock (mutex, abstime)
 
 		++mutex->__data.__count;
 
+		LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+
 		return 0;
 	      }
 	  }
@@ -476,6 +486,8 @@ pthread_mutex_timedlock (mutex, abstime)
       /* Record the ownership.  */
       mutex->__data.__owner = id;
       ++mutex->__data.__nusers;
+
+      LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
     }
 
  out:

nptl/pthread_mutex_unlock.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2005-2008, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -21,6 +21,7 @@
 #include <stdlib.h>
 #include "pthreadP.h"
 #include <lowlevellock.h>
+#include <stap-probe.h>
 
 static int
 internal_function
@@ -49,6 +50,9 @@ __pthread_mutex_unlock_usercnt (mutex, decr)
 
       /* Unlock.  */
       lll_unlock (mutex->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex));
+
+      LIBC_PROBE (mutex_release, 1, mutex);
+
       return 0;
     }
   else if (__builtin_expect (type == PTHREAD_MUTEX_RECURSIVE_NP, 1))
@@ -271,6 +275,9 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
 			PTHREAD_MUTEX_PSHARED (mutex));
 
       int oldprio = newval >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+      LIBC_PROBE (mutex_release, 1, mutex);
+
       return __pthread_tpp_change_priority (oldprio, -1);
 
     default:
@@ -278,6 +285,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
       return EINVAL;
     }
 
+  LIBC_PROBE (mutex_release, 1, mutex);
   return 0;
 }
 

nptl/pthread_rwlock_destroy.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -17,12 +17,15 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include "pthreadP.h"
+#include <stap-probe.h>
 
 
 int
 __pthread_rwlock_destroy (rwlock)
      pthread_rwlock_t *rwlock;
 {
+  LIBC_PROBE (rwlock_destroy, 1, rwlock);
+
   /* Nothing to be done.  For now.  */
   return 0;
 }

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;
 	}

nptl/pthread_rwlock_unlock.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2007 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.
 
@@ -21,11 +21,14 @@
 #include <lowlevellock.h>
 #include <pthread.h>
 #include <pthreadP.h>
+#include <stap-probe.h>
 
 /* Unlock RWLOCK.  */
 int
 __pthread_rwlock_unlock (pthread_rwlock_t *rwlock)
 {
+  LIBC_PROBE (rwlock_unlock, 1, rwlock);
+
   lll_lock (rwlock->__data.__lock, rwlock->__data.__shared);
   if (rwlock->__data.__writer)
     rwlock->__data.__writer = 0;

nptl/pthread_rwlock_wrlock.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2003,2007,2011 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 write lock for RWLOCK.  */
@@ -30,6 +31,8 @@ __pthread_rwlock_wrlock (rwlock)
 {
   int result = 0;
 
+  LIBC_PROBE (wrlock_entry, 1, rwlock);
+
   /* Make sure we are alone.  */
   lll_lock (rwlock->__data.__lock, rwlock->__data.__shared);
 
@@ -40,6 +43,8 @@ __pthread_rwlock_wrlock (rwlock)
 	{
 	  /* Mark self as writer.  */
 	  rwlock->__data.__writer = THREAD_GETMEM (THREAD_SELF, tid);
+
+	  LIBC_PROBE (wrlock_acquire_write, 1, rwlock);
 	  break;
 	}
 

nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2007, 2009, 2010, 2011 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -21,6 +21,8 @@
 #include <kernel-features.h>
 #include <lowlevellock.h>
 
+#include <stap-probe.h>
+
 	.text
 
 #ifdef __ASSUME_PRIVATE_FUTEX
@@ -86,7 +88,8 @@ __lll_lock_wait_private:
 	cmpl	%edx, %eax	/* NB:	 %edx == 2 */
 	jne	2f
 
-1:	movl	$SYS_futex, %eax
+1:	LIBC_PROBE (lll_lock_wait_private, 1, %rdi)
+	movl	$SYS_futex, %eax
 	syscall
 
 2:	movl	%edx, %eax
@@ -125,7 +128,8 @@ __lll_lock_wait:
 	cmpl	%edx, %eax	/* NB:	 %edx == 2 */
 	jne	2f
 
-1:	movl	$SYS_futex, %eax
+1:	LIBC_PROBE (lll_lock_wait, 2, %rdi, %rsi)
+	movl	$SYS_futex, %eax
 	syscall
 
 2:	movl	%edx, %eax

nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h

@@ -1,5 +1,4 @@
-/* Copyright (C) 2002-2004, 2006-2008, 2009, 2012
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
-   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -20,6 +19,8 @@
 #ifndef _LOWLEVELLOCK_H
 #define _LOWLEVELLOCK_H	1
 
+#include <stap-probe.h>
+
 #ifndef __ASSEMBLER__
 # include <time.h>
 # include <sys/param.h>
@@ -227,6 +228,7 @@ LLL_STUB_UNWIND_INFO_END
   do {									      \
     int __ignore;							      \
     register __typeof (nr) _nr __asm ("edx") = (nr);			      \
+    LIBC_PROBE (lll_futex_wake, 3, futex, nr, private);                       \
     __asm __volatile ("syscall"						      \
 		      : "=a" (__ignore)					      \
 		      : "0" (SYS_futex), "D" (futex),			      \
@@ -286,7 +288,7 @@ LLL_STUB_UNWIND_INFO_END
 			      "je 0f\n\t"				      \
 			      "lock; cmpxchgl %4, %2\n\t"		      \
 			      "jnz 1f\n\t"				      \
-		  	      "jmp 24f\n"				      \
+			      "jmp 24f\n"				      \
 			      "0:\tcmpxchgl %4, %2\n\t"			      \
 			      "jnz 1f\n\t"
 #endif

nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S

@@ -1,5 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
-   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -24,7 +23,7 @@
 #include <kernel-features.h>
 #include <pthread-pi-defines.h>
 #include <pthread-errnos.h>
-
+#include <stap-probe.h>
 
 	.text
 
@@ -34,6 +33,8 @@
 	.align	16
 __pthread_cond_broadcast:
 
+	LIBC_PROBE (cond_broadcast, 1, %rdi)
+
 	/* Get internal lock.  */
 	movl	$1, %esi
 	xorl	%eax, %eax

nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2005, 2007, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,6 +23,7 @@
 #include <pthread-pi-defines.h>
 #include <kernel-features.h>
 #include <pthread-errnos.h>
+#include <stap-probe.h>
 
 
 	.text
@@ -33,6 +34,8 @@
 	.align	16
 __pthread_cond_signal:
 
+	LIBC_PROBE (cond_signal, 1, %rdi)
+
 	/* Get internal lock.  */
 	movq	%rdi, %r8
 	movl	$1, %esi

nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2005,2007,2009,2010,2011 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -22,6 +22,7 @@
 #include <lowlevelcond.h>
 #include <pthread-pi-defines.h>
 #include <pthread-errnos.h>
+#include <stap-probe.h>
 
 #include <kernel-features.h>
 
@@ -67,6 +68,8 @@ __pthread_cond_timedwait:
 	cfi_adjust_cfa_offset(FRAME_SIZE)
 	cfi_remember_state
 
+	LIBC_PROBE (cond_timedwait, 3, %rdi, %rsi, %rdx)
+
 	cmpq	$1000000000, 8(%rdx)
 	movl	$EINVAL, %eax
 	jae	48f

nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2007, 2009, 2011 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,6 +23,7 @@
 #include <tcb-offsets.h>
 #include <pthread-pi-defines.h>
 #include <pthread-errnos.h>
+#include <stap-probe.h>
 
 #include <kernel-features.h>
 
@@ -54,20 +55,22 @@ __pthread_cond_wait:
 	   rsp + 32
 		    +--------------------------+
 	   rsp + 24 | old wake_seq value       |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp + 16 | mutex pointer            |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp +  8 | condvar pointer          |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp +  4 | old broadcast_seq value  |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp +  0 | old cancellation mode    |
-	            +--------------------------+
+		    +--------------------------+
 	*/
 
+	LIBC_PROBE (cond_wait, 2, %rdi, %rsi)
+
 	LP_OP(cmp) $-1, dep_mutex(%rdi)
 
-		/* Prepare structure passed to cancellation handler.  */
+	/* Prepare structure passed to cancellation handler.  */
 	movq	%rdi, 8(%rsp)
 	movq	%rsi, 16(%rsp)
 
@@ -406,15 +409,15 @@ __condvar_cleanup1:
 	   rsp + 32
 		    +--------------------------+
 	   rsp + 24 | unused                   |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp + 16 | mutex pointer            |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp +  8 | condvar pointer          |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp +  4 | old broadcast_seq value  |
-	            +--------------------------+
+		    +--------------------------+
 	   rsp +  0 | old cancellation mode    |
-	            +--------------------------+
+		    +--------------------------+
 	*/
 
 	movq	%rax, 24(%rsp)

nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -21,7 +21,7 @@
 #include <lowlevelrwlock.h>
 #include <pthread-errnos.h>
 #include <kernel-features.h>
-
+#include <stap-probe.h>
 
 	.text
 
@@ -30,6 +30,9 @@
 	.align	16
 __pthread_rwlock_rdlock:
 	cfi_startproc
+
+	LIBC_PROBE (rdlock_entry, 1, %rdi)
+
 	xorq	%r10, %r10
 
 	/* Get the lock.  */

nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -21,7 +21,7 @@
 #include <lowlevelrwlock.h>
 #include <pthread-errnos.h>
 #include <kernel-features.h>
-
+#include <stap-probe.h>
 
 	.text
 
@@ -30,6 +30,9 @@
 	.align	16
 __pthread_rwlock_wrlock:
 	cfi_startproc
+
+	LIBC_PROBE (wrlock_entry, 1, %rdi)
+
 	xorq	%r10, %r10
 
 	/* Get the lock.  */