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60 lines
1.6 KiB
60 lines
1.6 KiB
perf-probe(1)
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=============
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NAME
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----
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perf-probe - Define new dynamic tracepoints
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SYNOPSIS
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--------
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[verse]
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'perf probe' [options] --add='PROBE' [...]
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or
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'perf probe' [options] PROBE
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or
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'perf probe' [options] --del='[GROUP:]EVENT' [...]
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or
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'perf probe' --list
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DESCRIPTION
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-----------
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This command defines dynamic tracepoint events, by symbol and registers
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without debuginfo, or by C expressions (C line numbers, C function names,
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and C local variables) with debuginfo.
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OPTIONS
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-------
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-k::
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--vmlinux=PATH::
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Specify vmlinux path which has debuginfo (Dwarf binary).
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-v::
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--verbose::
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Be more verbose (show parsed arguments, etc).
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-a::
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--add=::
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Define a probe event (see PROBE SYNTAX for detail).
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-d::
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--del=::
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Delete a probe event.
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-l::
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--list::
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List up current probe events.
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PROBE SYNTAX
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------------
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Probe points are defined by following syntax.
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"FUNC[+OFFS|:RLN|%return][@SRC]|SRC:ALN [ARG ...]"
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'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.
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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.
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'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).
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SEE ALSO
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--------
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linkperf:perf-trace[1], linkperf:perf-record[1]
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