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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-12-06 12:00:33 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-12-06 12:00:33 -0500
commit3d14b5beba35250c548d3851a2b84fce742d8311 (patch)
tree065e3d93c3fcbc5ee4c44fa78662393cddbdf6de /tools/perf/Documentation/perf-probe.txt
parent0719dc341389882cc834ed18fc9b7fc6006b2b85 (diff)
parent1bf8e6219552d5dd27012d567ec8c4bb9c2d86b4 (diff)
Merge branch 'sa1100' into devel
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1perf-probe(1)
2=============
3
4NAME
5----
6perf-probe - Define new dynamic tracepoints
7
8SYNOPSIS
9--------
10[verse]
11'perf probe' [options] --add 'PROBE' [--add 'PROBE' ...]
12or
13'perf probe' [options] 'PROBE' ['PROBE' ...]
14
15
16DESCRIPTION
17-----------
18This command defines dynamic tracepoint events, by symbol and registers
19without debuginfo, or by C expressions (C line numbers, C function names,
20and C local variables) with debuginfo.
21
22
23OPTIONS
24-------
25-k::
26--vmlinux=PATH::
27 Specify vmlinux path which has debuginfo (Dwarf binary).
28
29-v::
30--verbose::
31 Be more verbose (show parsed arguments, etc).
32
33-a::
34--add::
35 Define a probe point (see PROBE SYNTAX for detail)
36
37PROBE SYNTAX
38------------
39Probe points are defined by following syntax.
40
41 "FUNC[+OFFS|:RLN|%return][@SRC]|SRC:ALN [ARG ...]"
42
43'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.
44It 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.
45'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).
46
47SEE ALSO
48--------
49linkperf:perf-trace[1], linkperf:perf-record[1]