$ ./pthreadtracer -p `pgrep nslookup` 
[ 21088.9252645] load: 2.83  cmd: pthreadtracer 6404 [wait parked] 0.00u 0.00s 0% 1600k
DTV=0x7f7ff7ee70c8 TCB_PTHREAD=0x7f7ff7e94000
LID=4 NAME='sock-0' TLS_TSD=0x7f7ff7eed890
pt_self = 0x7f7ff7e94000
pt_tls = 0x7f7ff7eed890
pt_magic = 0x11110001 (= PT_MAGIC=0x11110001)
pt_state = 1
pt_lock = 0x0
pt_flags = 0
pt_cancel = 0
pt_errno = 35
pt_stack = {.ss_sp = 0x7f7fef9e0000, ss_size = 4194304, ss_flags = 0}
pt_stack_allocated = YES
pt_guardsize = 65536
pt_exitval = 0x0
pt_name = ''
pt_exitval = 0x0
pt_willpark = 0
pt_unpark = 0
pt_lockops = {.plo_init=0x7f7ff540a123, .plo_try=0x7f7ff540a127, .plo_unlock=0x7f7ff540a137, .plo_lock=0x7f7ff540a13b}
pt_droplock = 0x0
pt_joiners = 0x0
pt_func = 0x7f7ff601dc01
pt_arg = 0x7f7ff7e47208
pt_waiters = []
pt_nwaiters = 0
pt_cleanup_stack = 0x0
pt_lid = 4
pt_alltree = 0x0
pt_allq = 0x0
pt_deadq = 0x0
pt_dummy1 = 0
pt_lwpctl = 0x7f7ff7ec6010
pt_blocking = 0
pt_rwblocked = 0
pt_signalled = 0
pt_mutexwait = 0
pt_mutexnext = 0x0
pt_sleepobj = 0
pt_sleep = 0x0
pt_early = 0x0
pt_dummy2 = 0
pt_havespecific = 0
pt_specific = 0x7f7ff67ff988
DTV=0x7f7ff7ee7088 TCB_PTHREAD=0x7f7ff7e96000
LID=3 NAME='timer' TLS_TSD=0x7f7ff7eeb890
pt_self = 0x7f7ff7e96000
pt_tls = 0x7f7ff7eeb890
pt_magic = 0x11110001 (= PT_MAGIC=0x11110001)
pt_state = 1
pt_lock = 0x0
pt_flags = 0
pt_cancel = 0
pt_errno = 0
pt_stack = {.ss_sp = 0x7f7fefdf0000, ss_size = 4194304, ss_flags = 0}
pt_stack_allocated = YES
pt_guardsize = 65536
pt_exitval = 0x0
pt_name = ''
pt_exitval = 0x0
pt_willpark = 0
pt_unpark = 0
pt_lockops = {.plo_init=0x7f7ff540a123, .plo_try=0x7f7ff540a127, .plo_unlock=0x7f7ff540a137, .plo_lock=0x7f7ff540a13b}
pt_droplock = 0x0
pt_joiners = 0x0
pt_func = 0x7f7ff6023f66
pt_arg = 0x7f7ff7e4f1c0
pt_waiters = []
pt_nwaiters = 0
pt_cleanup_stack = 0x0
pt_lid = 3
pt_alltree = 0x0
pt_allq = 0x7f7ff7e94000
pt_deadq = 0x0
pt_dummy1 = 0
pt_lwpctl = 0x7f7ff7ec6018
pt_blocking = 1
pt_rwblocked = 0
pt_signalled = 0
pt_mutexwait = 0
pt_mutexnext = 0x0
pt_sleepobj = -135990744
pt_sleep = 0x0
pt_early = 0x0
pt_dummy2 = 0
pt_havespecific = 0
pt_specific = 0x7f7ff67ff988
DTV=0x7f7ff7ee7048 TCB_PTHREAD=0x7f7ff7e98000
LID=2 NAME='work-0' TLS_TSD=0x7f7ff7ee9890
pt_self = 0x7f7ff7e98000
pt_tls = 0x7f7ff7ee9890
pt_magic = 0x11110001 (= PT_MAGIC=0x11110001)
pt_state = 1
pt_lock = 0x0
pt_flags = 0
pt_cancel = 0
pt_errno = 35
pt_stack = {.ss_sp = 0x7f7ff0200000, ss_size = 4194304, ss_flags = 0}
pt_stack_allocated = YES
pt_guardsize = 65536
pt_exitval = 0x0
pt_name = ''
pt_exitval = 0x0
pt_willpark = 0
pt_unpark = 0
pt_lockops = {.plo_init=0x7f7ff540a123, .plo_try=0x7f7ff540a127, .plo_unlock=0x7f7ff540a137, .plo_lock=0x7f7ff540a13b}
pt_droplock = 0x0
pt_joiners = 0x0
pt_func = 0x7f7ff6031caf
pt_arg = 0x7f7ff7e4d1c0
pt_waiters = []
pt_nwaiters = 0
pt_cleanup_stack = 0x0
pt_lid = 2
pt_alltree = 0x0
pt_allq = 0x7f7ff7e96000
pt_deadq = 0x0
pt_dummy1 = 0
pt_lwpctl = 0x7f7ff7ec6008
pt_blocking = 0
pt_rwblocked = 0
pt_signalled = 0
pt_mutexwait = 0
pt_mutexnext = 0x0
pt_sleepobj = 0
pt_sleep = 0x0
pt_early = 0x0
pt_dummy2 = 0
pt_havespecific = 1
pt_specific = 0x7f7ff67ff988
DTV=0x7f7ff7ee7008 TCB_PTHREAD=0x7f7ff7ed7800
LID=1 NAME='' TLS_TSD=0x7f7ff7ee6890
pt_self = 0x7f7ff7ed7800
pt_tls = 0x7f7ff7ee6890
pt_magic = 0x11110001 (= PT_MAGIC=0x11110001)
pt_state = 1
pt_lock = 0x0
pt_flags = 0
pt_cancel = 0
pt_errno = 0
pt_stack = {.ss_sp = 0x7f7fffbff000, ss_size = 4194304, ss_flags = 0}
pt_stack_allocated = NO
pt_guardsize = 1048576
pt_exitval = 0x0
pt_name = ''
pt_exitval = 0x0
pt_willpark = 0
pt_unpark = 0
pt_lockops = {.plo_init=0x7f7ff540a123, .plo_try=0x7f7ff540a127, .plo_unlock=0x7f7ff540a137, .plo_lock=0x7f7ff540a13b}
pt_droplock = 0x0
pt_joiners = 0x0
pt_func = 0x0
pt_arg = 0x0
pt_waiters = []
pt_nwaiters = 0
pt_cleanup_stack = 0x0
pt_lid = 1
pt_alltree = 0x0
pt_allq = 0x7f7ff7e98000
pt_deadq = 0x0
pt_dummy1 = 0
pt_lwpctl = 0x7f7ff7ec6000
pt_blocking = 0
pt_rwblocked = 0
pt_signalled = 0
pt_mutexwait = 0
pt_mutexnext = 0x0
pt_sleepobj = 0
pt_sleep = 0x0
pt_early = 0x0
pt_dummy2 = 0
pt_havespecific = 1
pt_specific = 0x7f7ff67ff988