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Re: [PATCH] Adding systemtap probe points in pthread library(slightly revised again)
On Wed, 2011-02-09 at 19:00 +0100, Bert Wesarg wrote:
> IMHO, this is a typo. Because for 'read' you have
> 'rdlock_acquire_read' and 'rdlock_entry'. So judging from this
> pattern, I would expect, that this probe would be
> 'wrlock_acquire_write', like 'wrlock_entry'. Also note, that in the
> 'acquire' probe names are redundancies for 'read' and 'write' (after
> fixing the typo), while in the 'entry' names not.
Thanks Bert for providing comments since the beginning of the release of
this patch. I think changing wrlock_acquire_write makes sense -
originally I wanted to use "rw" to indicate it's a read-write lock, and
use "wr" to indicate it's "write". But in this case it does not make
things consistent.
However, I think it makes sense to have the 'acquire' probe names - but
if you really think there are redundancies, can you explain it in a bit
more detail??
Revised patch:
nptl/Changlog changes:
2011-02-09 Rayson Ho <rho@redhat.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_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.
diff --git a/nptl/pthread_cond_broadcast.c b/nptl/pthread_cond_broadcast.c
index 22523c2..a2e462f 100644
--- a/nptl/pthread_cond_broadcast.c
+++ b/nptl/pthread_cond_broadcast.c
@@ -23,6 +23,7 @@
#include <lowlevellock.h>
#include <pthread.h>
#include <pthreadP.h>
+#include <stap-probe.h>
#include <shlib-compat.h>
#include <kernel-features.h>
@@ -32,6 +33,8 @@ 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. */
diff --git a/nptl/pthread_cond_destroy.c b/nptl/pthread_cond_destroy.c
index 35135a6..a28d061 100644
--- a/nptl/pthread_cond_destroy.c
+++ b/nptl/pthread_cond_destroy.c
@@ -20,6 +20,7 @@
#include <errno.h>
#include <shlib-compat.h>
#include "pthreadP.h"
+#include <stap-probe.h>
int
@@ -29,6 +30,8 @@ __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);
diff --git a/nptl/pthread_cond_init.c b/nptl/pthread_cond_init.c
index 65c01b1..caec6ca 100644
--- a/nptl/pthread_cond_init.c
+++ b/nptl/pthread_cond_init.c
@@ -20,6 +20,7 @@
#include <shlib-compat.h>
#include "pthreadP.h"
+#include <stap-probe.h>
int
@@ -42,6 +43,8 @@ __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,
diff --git a/nptl/pthread_cond_signal.c b/nptl/pthread_cond_signal.c
index 023bbb5..414e6bc 100644
--- a/nptl/pthread_cond_signal.c
+++ b/nptl/pthread_cond_signal.c
@@ -26,6 +26,7 @@
#include <shlib-compat.h>
#include <kernel-features.h>
+#include <stap-probe.h>
int
@@ -35,6 +36,8 @@ __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);
diff --git a/nptl/pthread_cond_wait.c b/nptl/pthread_cond_wait.c
index 467a03a..3d4c583 100644
--- a/nptl/pthread_cond_wait.c
+++ b/nptl/pthread_cond_wait.c
@@ -25,6 +25,7 @@
#include <pthreadP.h>
#include <shlib-compat.h>
+#include <stap-probe.h>
struct _condvar_cleanup_buffer
@@ -101,6 +102,8 @@ __pthread_cond_wait (cond, mutex)
int pshared = (cond->__data.__mutex == (void *) ~0l)
? LLL_SHARED : LLL_PRIVATE;
+ LIBC_PROBE (cond_wait, 2, cond, mutex);
+
/* Make sure we are alone. */
lll_lock (cond->__data.__lock, pshared);
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index 4075dd9..d3f5f06 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -556,6 +556,8 @@ __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);
}
diff --git a/nptl/pthread_join.c b/nptl/pthread_join.c
index 6a87a8b..609e2cf 100644
--- a/nptl/pthread_join.c
+++ b/nptl/pthread_join.c
@@ -23,6 +23,8 @@
#include <atomic.h>
#include "pthreadP.h"
+#include <stap-probe.h>
+
static void
cleanup (void *arg)
@@ -55,6 +57,8 @@ 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. */
@@ -110,5 +114,7 @@ pthread_join (threadid, thread_return)
__free_tcb (pd);
}
+ LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd->result);
+
return result;
}
diff --git a/nptl/pthread_mutex_destroy.c b/nptl/pthread_mutex_destroy.c
index e2c9f8a..45c80b8 100644
--- a/nptl/pthread_mutex_destroy.c
+++ b/nptl/pthread_mutex_destroy.c
@@ -20,11 +20,15 @@
#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;
diff --git a/nptl/pthread_mutex_init.c b/nptl/pthread_mutex_init.c
index d9b1ef0..a025a38 100644
--- a/nptl/pthread_mutex_init.c
+++ b/nptl/pthread_mutex_init.c
@@ -24,6 +24,8 @@
#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. */
@@ -135,6 +137,8 @@ __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)
diff --git a/nptl/pthread_mutex_lock.c b/nptl/pthread_mutex_lock.c
index 50dc188..010d43e 100644
--- a/nptl/pthread_mutex_lock.c
+++ b/nptl/pthread_mutex_lock.c
@@ -24,6 +24,7 @@
#include <not-cancel.h>
#include "pthreadP.h"
#include <lowlevellock.h>
+#include <stap-probe.h>
#ifndef LLL_MUTEX_LOCK
@@ -48,6 +49,9 @@ __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);
@@ -60,6 +64,8 @@ __pthread_mutex_lock (mutex)
/* Normal mutex. */
LLL_MUTEX_LOCK (mutex);
assert (mutex->__data.__owner == 0);
+
+ LIBC_PROBE (mutex_block, 1, mutex);
}
else if (__builtin_expect (type == PTHREAD_MUTEX_RECURSIVE_NP, 1))
{
@@ -83,6 +89,8 @@ __pthread_mutex_lock (mutex)
assert (mutex->__data.__owner == 0);
mutex->__data.__count = 1;
+
+ LIBC_PROBE (mutex_block, 1, mutex);
}
else if (__builtin_expect (type == PTHREAD_MUTEX_ADAPTIVE_NP, 1))
{
@@ -108,6 +116,8 @@ __pthread_mutex_lock (mutex)
}
while (LLL_MUTEX_TRYLOCK (mutex) != 0);
+ LIBC_PROBE (mutex_block, 1, mutex);
+
mutex->__data.__spins += (cnt - mutex->__data.__spins) / 8;
}
assert (mutex->__data.__owner == 0);
@@ -127,6 +137,8 @@ __pthread_mutex_lock (mutex)
++mutex->__data.__nusers;
#endif
+ LIBC_PROBE (mutex_acquired, 1, mutex);
+
return 0;
}
@@ -451,6 +463,8 @@ __pthread_mutex_lock_full (pthread_mutex_t *mutex)
}
while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
+ LIBC_PROBE (mutex_block, 1, mutex);
+
assert (mutex->__data.__owner == 0);
mutex->__data.__count = 1;
}
@@ -467,6 +481,8 @@ __pthread_mutex_lock_full (pthread_mutex_t *mutex)
++mutex->__data.__nusers;
#endif
+ LIBC_PROBE (mutex_acquired, 1, mutex);
+
return 0;
}
#ifndef __pthread_mutex_lock
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c
index f9fe10b..479e500 100644
--- a/nptl/pthread_mutex_unlock.c
+++ b/nptl/pthread_mutex_unlock.c
@@ -22,6 +22,7 @@
#include <stdlib.h>
#include "pthreadP.h"
#include <lowlevellock.h>
+#include <stap-probe.h>
static int
internal_function
@@ -50,6 +51,9 @@ __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))
@@ -272,6 +276,9 @@ __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:
@@ -279,6 +286,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
return EINVAL;
}
+ LIBC_PROBE (mutex_release, 1, mutex);
return 0;
}
diff --git a/nptl/pthread_rwlock_destroy.c b/nptl/pthread_rwlock_destroy.c
index 28fd24b..84aa693 100644
--- a/nptl/pthread_rwlock_destroy.c
+++ b/nptl/pthread_rwlock_destroy.c
@@ -18,12 +18,15 @@
02111-1307 USA. */
#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;
}
diff --git a/nptl/pthread_rwlock_rdlock.c b/nptl/pthread_rwlock_rdlock.c
index 2feac57..09bad14 100644
--- a/nptl/pthread_rwlock_rdlock.c
+++ b/nptl/pthread_rwlock_rdlock.c
@@ -22,6 +22,7 @@
#include <lowlevellock.h>
#include <pthread.h>
#include <pthreadP.h>
+#include <stap-probe.h>
/* Acquire read lock for RWLOCK. */
@@ -31,6 +32,8 @@ __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);
@@ -49,6 +52,8 @@ __pthread_rwlock_rdlock (rwlock)
--rwlock->__data.__nr_readers;
result = EAGAIN;
}
+ else
+ LIBC_PROBE (rdlock_acquire_read, 1, rwlock);
break;
}
diff --git a/nptl/pthread_rwlock_unlock.c b/nptl/pthread_rwlock_unlock.c
index a7ef71a..a6e8d87 100644
--- a/nptl/pthread_rwlock_unlock.c
+++ b/nptl/pthread_rwlock_unlock.c
@@ -22,11 +22,14 @@
#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;
diff --git a/nptl/pthread_rwlock_wrlock.c b/nptl/pthread_rwlock_wrlock.c
index 9d5f135..c099852 100644
--- a/nptl/pthread_rwlock_wrlock.c
+++ b/nptl/pthread_rwlock_wrlock.c
@@ -22,6 +22,7 @@
#include <lowlevellock.h>
#include <pthread.h>
#include <pthreadP.h>
+#include <stap-probe.h>
/* Acquire write lock for RWLOCK. */
@@ -31,6 +32,8 @@ __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);
@@ -41,6 +44,8 @@ __pthread_rwlock_wrlock (rwlock)
{
/* Mark self as writer. */
rwlock->__data.__writer = THREAD_GETMEM (THREAD_SELF, tid);
+
+ LIBC_PROBE (wrlock_acquire_write, 1, rwlock);
break;
}
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
index 3195db2..ea132f5 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
@@ -22,6 +22,8 @@
#include <kernel-features.h>
#include <lowlevellock.h>
+#include <stap-probe.h>
+
.text
#ifdef __ASSUME_PRIVATE_FUTEX
@@ -91,7 +93,8 @@ __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
@@ -130,7 +133,8 @@ __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
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
index 9b15bfb..da7b019 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
@@ -20,6 +20,8 @@
#ifndef _LOWLEVELLOCK_H
#define _LOWLEVELLOCK_H 1
+#include <stap-probe.h>
+
#ifndef __ASSEMBLER__
# include <time.h>
# include <sys/param.h>
@@ -227,6 +229,7 @@ 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), \
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S
index 224a560..6037449 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S
@@ -25,7 +25,7 @@
#include <kernel-features.h>
#include <pthread-pi-defines.h>
#include <pthread-errnos.h>
-
+#include <stap-probe.h>
.text
@@ -35,6 +35,8 @@
.align 16
__pthread_cond_broadcast:
+ LIBC_PROBE (cond_broadcast, 1, %rdi)
+
/* Get internal lock. */
movl $1, %esi
xorl %eax, %eax
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
index d1d83a8..80a61a4 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
@@ -24,6 +24,7 @@
#include <pthread-pi-defines.h>
#include <kernel-features.h>
#include <pthread-errnos.h>
+#include <stap-probe.h>
.text
@@ -34,6 +35,8 @@
.align 16
__pthread_cond_signal:
+ LIBC_PROBE (cond_signal, 1, %rdi)
+
/* Get internal lock. */
movq %rdi, %r8
movl $1, %esi
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
index e6535fb..dad8ad4 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
@@ -23,6 +23,7 @@
#include <lowlevelcond.h>
#include <pthread-pi-defines.h>
#include <pthread-errnos.h>
+#include <stap-probe.h>
#include <kernel-features.h>
@@ -41,6 +42,9 @@
__pthread_cond_timedwait:
.LSTARTCODE:
cfi_startproc
+
+ LIBC_PROBE (cond_timedwait, 3, %rdi, %rsi, %rdx)
+
#ifdef SHARED
cfi_personality(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect,
DW.ref.__gcc_personality_v0)
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S
index f5b929e..09884bb 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S
@@ -23,6 +23,7 @@
#include <lowlevelcond.h>
#include <tcb-offsets.h>
#include <pthread-pi-defines.h>
+#include <stap-probe.h>
#include <kernel-features.h>
@@ -34,6 +35,9 @@
.type __pthread_cond_wait, @function
.align 16
__pthread_cond_wait:
+
+ LIBC_PROBE (cond_wait, 2, %rdi, %rsi)
+
.LSTARTCODE:
cfi_startproc
#ifdef SHARED
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
index 35eb09c..1e794a9 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
@@ -22,7 +22,7 @@
#include <lowlevelrwlock.h>
#include <pthread-errnos.h>
#include <kernel-features.h>
-
+#include <stap-probe.h>
.text
@@ -31,6 +31,9 @@
.align 16
__pthread_rwlock_rdlock:
cfi_startproc
+
+ LIBC_PROBE (rdlock_entry, 1, %rdi)
+
xorq %r10, %r10
/* Get the lock. */
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
index be6b8d8..9cc1197 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
@@ -22,7 +22,7 @@
#include <lowlevelrwlock.h>
#include <pthread-errnos.h>
#include <kernel-features.h>
-
+#include <stap-probe.h>
.text
@@ -31,6 +31,9 @@
.align 16
__pthread_rwlock_wrlock:
cfi_startproc
+
+ LIBC_PROBE (wrlock_entry, 1, %rdi)
+
xorq %r10, %r10
/* Get the lock. */
Thanks,
Rayson
>
> Bert
>
> > +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
> > +