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2 .\" SPDX-License-Identifier: BSD-2-Clause
55 .Sh USER-DEFINED VARIABLE TYPES
56 .Bl -column "thread-local" "Syntax"
60 .It thread-local Ta Sy self-> Ns Va variable_name
61 .It clause-local Ta Sy this-> Ns Va variable_name
65 .Bl -dash -compact
71 Aggregate variables are multi-CPU safe in contrast to global variables.
73 .Sh BUILT-IN VARIABLES
75 .Bl -tag -width "arg0, ..., arg9"
79 The untyped probe arguments represented as 64-bit unsigned integers.
83 .Bl -tag -width probeprov
119 .Bl -tag -width execname
123 .Ql curthread->td_proc->p_args .
125 The name of the current process.
127 .Ql curthread->td_proc->p_comm .
129 The group ID of the current process.
131 The process ID of the current process.
133 The parent process ID of the current process.
135 The user ID of the current process.
138 .Bl -tag -width curlwpsinfo
140 The saved user-mode register values.
142 The ID of the current CPU.
155 value of the last system call performed by the current thread.
159 representation of the current thread.
166 representation of the current process.
171 A pointer to the thread struct that is currently on-CPU.
173 .Ql curthread->td_name
181 of the current probe.
187 .Bl -tag -width walltimestamp
192 The number of nanoseconds that the current thread spent on CPU.
194 Suitable for calculating relative time differences of on-CPU time.
197 .Pq 1970-01-01T00+00:00 .
200 .Sh BUILT-IN FUNCTIONS
203 .Bl -tag -width "size_t strlen"
219 .Bd -literal -compact -offset indent
225 .Bd -literal -compact -offset indent
237 .Bd -literal -compact -offset indent
264 .Bd -literal -compact -offset indent
270 .Bd -literal -compact -offset indent
282 .Bd -literal -compact -offset indent
297 .Fa length Ns -long .
309 .Bd -literal -compact -offset indent
314 .Bd -literal -compact -offset indent
320 .Bd -literal -compact -offset indent
326 .Bl -tag -compact -width "llquantize(value, factor, low, high, nsteps)"
331 .It Fn llquantize value factor low high nsteps
332 Log-linear quantization
333 .It Fn lquantize value low high nsteps
340 Power-of-two frequency distribution
350 .Bl -tag -width "chill(nanoseconds)"
363 .Bl -tag -width /usr/share/dtrace
387 .%A George Neville-Neil
398 .%U https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-924.pdf
404 .An -nosplit
410 variable which typically provides the current working directory is