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- perf-probe(1)
- =============
- NAME
- ----
- perf-probe - Define new dynamic tracepoints
- SYNOPSIS
- --------
- [verse]
- 'perf probe' [options] --add 'PROBE' [--add 'PROBE' ...]
- or
- 'perf probe' [options] 'PROBE' ['PROBE' ...]
- DESCRIPTION
- -----------
- This command defines dynamic tracepoint events, by symbol and registers
- without debuginfo, or by C expressions (C line numbers, C function names,
- and C local variables) with debuginfo.
- OPTIONS
- -------
- -k::
- --vmlinux=PATH::
- Specify vmlinux path which has debuginfo (Dwarf binary).
- -v::
- --verbose::
- Be more verbose (show parsed arguments, etc).
- -a::
- --add::
- Define a probe point (see PROBE SYNTAX for detail)
- PROBE SYNTAX
- ------------
- Probe points are defined by following syntax.
- "FUNC[+OFFS|:RLN|%return][@SRC]|SRC:ALN [ARG ...]"
- 'FUNC' specifies a probed function name, and it may have one of the following options; '+OFFS' is the offset from function entry address in bytes, 'RLN' is the relative-line number from function entry line, and '%return' means that it probes function return. In addition, 'SRC' specifies a source file which has that function.
- It is also possible to specify a probe point by the source line number by using 'SRC:ALN' syntax, where 'SRC' is the source file path and 'ALN' is the line number.
- 'ARG' specifies the arguments of this probe point. You can use the name of local variable, or kprobe-tracer argument format (e.g. $retval, %ax, etc).
- SEE ALSO
- --------
- linkperf:perf-trace[1], linkperf:perf-record[1]
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