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-rw-r--r--tools/perf/Documentation/perf-probe.txt19
1 files changed, 18 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 2780d9c..b715cb7 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -77,7 +77,8 @@ OPTIONS
-F::
--funcs::
- Show available functions in given module or kernel.
+ Show available functions in given module or kernel. With -x/--exec,
+ can also list functions in a user space executable / shared library.
--filter=FILTER::
(Only for --vars and --funcs) Set filter. FILTER is a combination of glob
@@ -98,6 +99,15 @@ OPTIONS
--max-probes::
Set the maximum number of probe points for an event. Default is 128.
+-x::
+--exec=PATH::
+ Specify path to the executable or shared library file for user
+ space tracing. Can also be used with --funcs option.
+
+In absence of -m/-x options, perf probe checks if the first argument after
+the options is an absolute path name. If its an absolute path, perf probe
+uses it as a target module/target user space binary to probe.
+
PROBE SYNTAX
------------
Probe points are defined by following syntax.
@@ -182,6 +192,13 @@ Delete all probes on schedule().
./perf probe --del='schedule*'
+Add probes at zfree() function on /bin/zsh
+
+ ./perf probe -x /bin/zsh zfree or ./perf probe /bin/zsh zfree
+
+Add probes at malloc() function on libc
+
+ ./perf probe -x /lib/libc.so.6 malloc or ./perf probe /lib/libc.so.6 malloc
SEE ALSO
--------