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

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This commit is contained in:
Roland McGrath 2012-05-25 13:35:08 -07:00
parent 8422c9a560
commit 5acf7263d5
26 changed files with 266 additions and 53 deletions
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29
nptl/ChangeLog
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@ -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.

89
nptl/DESIGN-systemtap-probes.txt Normal file
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@ -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

3
nptl/pthread_cond_broadcast.c
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@ -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. */

19
nptl/pthread_cond_destroy.c
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@ -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.
Without this, pthread_cond_destroy could block potentially
for a long time or forever, as it would depend on other
thread's using the mutex.
When all threads waiting on the mutex are woken up, pthread_cond_wait
only waits for threads to acquire and release the internal
condvar lock. */
threads that have been requeued to it.
Without this, pthread_cond_destroy could block potentially
for a long time or forever, as it would depend on other
thread's using the mutex.
When all threads waiting on the mutex are woken up, pthread_cond_wait
only waits for threads to acquire and release the internal
condvar lock. */
if (cond->__data.__mutex != NULL
&& cond->__data.__mutex != (void *) ~0l)
{

6
nptl/pthread_cond_init.c
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@ -1,5 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2005, 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.
@ -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,

5
nptl/pthread_cond_signal.c
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@ -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);

9
nptl/pthread_cond_wait.c
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@ -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);

4
nptl/pthread_create.c
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@ -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);
}

8
nptl/pthread_join.c
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@ -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;
}

6
nptl/pthread_mutex_destroy.c
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@ -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;

7
nptl/pthread_mutex_init.c
View File

@ -1,5 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2005, 2006, 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.
@ -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)

10
nptl/pthread_mutex_lock.c
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@ -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

14
nptl/pthread_mutex_timedlock.c
View File

@ -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:

10
nptl/pthread_mutex_unlock.c
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@ -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;
}

5
nptl/pthread_rwlock_destroy.c
View File

@ -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;
}

7
nptl/pthread_rwlock_rdlock.c
View File

@ -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;
}

5
nptl/pthread_rwlock_unlock.c
View File

@ -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;

7
nptl/pthread_rwlock_wrlock.c
View File

@ -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;
}

10
nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
View File

@ -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

8
nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
View File

@ -1,5 +1,4 @@
/* Copyright (C) 2002-2004, 2006-2008, 2009, 2012
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.
@ -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

7
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S
View File

@ -1,5 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2005, 2006, 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.
@ -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

5
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
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@ -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

5
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
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@ -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

27
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S
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@ -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)

7
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
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@ -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. */

7
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
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@ -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. */