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