[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/nptl/DESIGN-systemtap-probes.txt b/ap/libc/glibc/glibc-2.22/nptl/DESIGN-systemtap-probes.txt
new file mode 100644
index 0000000..ac972a9
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/nptl/DESIGN-systemtap-probes.txt
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+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
+
+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