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perf probe: Support function@filename syntax for --line

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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>
This commit is contained in:
Masami Hiramatsu 2011-02-10 18:08:10 +09:00 committed by Arnaldo Carvalho de Melo
parent 4187e262bc
commit e116dfa1c3
2 changed files with 16 additions and 6 deletions
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7
tools/perf/Documentation/perf-probe.txt
View File

@ -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

15
tools/perf/util/probe-event.c
View File

@ -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;