From c43f9d1e61e265c6bfafdd65c7f07c8d71a7efc3 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Tue, 3 Nov 2009 19:12:13 -0500 Subject: [PATCH] perf/probes: Update Documentation/perf-probe.txt Update Documentation/perf-probe.txt accoding to recent syntax changes. Signed-off-by: Masami Hiramatsu Acked-by: Frederic Weisbecker Cc: Steven Rostedt Cc: Jim Keniston Cc: Ananth N Mavinakayanahalli Cc: Christoph Hellwig Cc: Frank Ch. Eigler Cc: Jason Baron Cc: K.Prasad Cc: Peter Zijlstra Cc: Srikar Dronamraju LKML-Reference: <20091104001212.3454.19415.stgit@harusame> Signed-off-by: Ingo Molnar --- tools/perf/Documentation/perf-probe.txt | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index 6b6c6aecdf1..9270594e6df 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -8,7 +8,9 @@ perf-probe - Define new dynamic tracepoints SYNOPSIS -------- [verse] -'perf probe' [-k ] -P 'PROBE' [-P 'PROBE' ...] +'perf probe' [options] --add 'PROBE' [--add 'PROBE' ...] +or +'perf probe' [options] 'PROBE' ['PROBE' ...] DESCRIPTION @@ -21,26 +23,25 @@ and C local variables) with debuginfo. OPTIONS ------- -k:: ---vmlinux:: +--vmlinux=PATH:: Specify vmlinux path which has debuginfo (Dwarf binary). -v:: --verbose:: Be more verbose (show parsed arguments, etc). --P:: ---probe:: +-a:: +--add:: Define a probe point (see PROBE SYNTAX for detail) PROBE SYNTAX ------------ Probe points are defined by following syntax. - "TYPE:[GRP/]NAME FUNC[+OFFS][@SRC]|@SRC:LINE [ARG ...]" + "FUNC[+OFFS|:RLN|%return][@SRC]|SRC:ALN [ARG ...]" -'TYPE' specifies the type of probe point, you can use either "p" (kprobe) or "r" (kretprobe) for 'TYPE'. 'GRP' specifies the group name of this probe, and 'NAME' specifies the event name. If 'GRP' is omitted, "kprobes" is used for its group name. -'FUNC' and 'OFFS' specifies function and offset (in byte) where probe will be put. In addition, 'SRC' specifies a source file which has that function (this is mainly for inline functions). -You can specify a probe point by the source line number by using '@SRC:LINE' syntax, where 'SRC' is the source file path and 'LINE' is the line number. +'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