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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2011-02-10 18:08:10 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-02-16 17:03:23 -0200
commite116dfa1c357da49f55e1555767ec991225a8321 (patch)
tree58399140eb095b3550b5593c4e6348983208604c /tools
parent4187e262bc90369ba581ee28ec74ed416618889e (diff)
perf probe: Support function@filename syntax for --line
Since "perf probe --add" supports function@filename syntax, --line option should also support it. Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Franck Bui-Huu <fbuihuu@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: linux-kernel@vger.kernel.org LKML-Reference: <20110210090810.1809.26913.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-probe.txt7
-rw-r--r--tools/perf/util/probe-event.c15
2 files changed, 16 insertions, 6 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 81c3220e04f..02bafce4b34 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -16,7 +16,7 @@ or
or
'perf probe' --list
or
-'perf probe' [options] --line='FUNC[:RLN[+NUM|:RLN2]]|SRC:ALN[+NUM|:ALN2]'
+'perf probe' [options] --line='LINE'
or
'perf probe' [options] --vars='PROBEPOINT'
@@ -128,13 +128,14 @@ LINE SYNTAX
-----------
Line range is described by following syntax.
- "FUNC[:RLN[+NUM|-RLN2]]|SRC[:ALN[+NUM|-ALN2]]"
+ "FUNC[@SRC][:RLN[+NUM|-RLN2]]|SRC[:ALN[+NUM|-ALN2]]"
FUNC specifies the function name of showing lines. 'RLN' is the start line
number from function entry line, and 'RLN2' is the end line number. As same as
probe syntax, 'SRC' means the source file path, 'ALN' is start line number,
and 'ALN2' is end line number in the file. It is also possible to specify how
-many lines to show by using 'NUM'.
+many lines to show by using 'NUM'. Moreover, 'FUNC@SRC' combination is good
+for searching a specific function when several functions share same name.
So, "source.c:100-120" shows lines between 100th to l20th in source.c file. And "func:10+20" shows 20 lines from 10th line of func function.
LAZY MATCHING
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 9d237e3cff5..cbd76507a56 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -595,11 +595,11 @@ static int parse_line_num(char **ptr, int *val, const char *what)
* The line range syntax is described by:
*
* SRC[:SLN[+NUM|-ELN]]
- * FNC[:SLN[+NUM|-ELN]]
+ * FNC[@SRC][:SLN[+NUM|-ELN]]
*/
int parse_line_range_desc(const char *arg, struct line_range *lr)
{
- char *range, *name = strdup(arg);
+ char *range, *file, *name = strdup(arg);
int err;
if (!name)
@@ -649,7 +649,16 @@ int parse_line_range_desc(const char *arg, struct line_range *lr)
}
}
- if (strchr(name, '.'))
+ file = strchr(name, '@');
+ if (file) {
+ *file = '\0';
+ lr->file = strdup(++file);
+ if (lr->file == NULL) {
+ err = -ENOMEM;
+ goto err;
+ }
+ lr->function = name;
+ } else if (strchr(name, '.'))
lr->file = name;
else
lr->function = name;