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Update Documentation/perf-probe.txt accoding to recent syntax changes. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Jason Baron <jbaron@redhat.com> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> LKML-Reference: <20091104001212.3454.19415.stgit@harusame> Signed-off-by: Ingo Molnar <mingo@elte.hu>
49 lines
1.5 KiB
Text
49 lines
1.5 KiB
Text
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' [--add 'PROBE' ...]
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or
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'perf probe' [options] 'PROBE' ['PROBE' ...]
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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 point (see PROBE SYNTAX for detail)
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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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