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Subject[PATCH 4/6] perf-probe: Fix line range description since a single file is allowed
Date
From: Franck Bui-Huu <fbuihuu@gmail.com>

$ perf-probe -L sched.c

is currently allowed but not documented.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
---
tools/perf/Documentation/perf-probe.txt | 2 +-
tools/perf/util/probe-event.c | 13 ++++++++-----
2 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 62de1b7..562501f 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -117,7 +117,7 @@ LINE SYNTAX
-----------
Line range is descripted by following syntax.

- "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]"
+ "FUNC[: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
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 3c92b92..8e5f5ff 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -525,15 +525,18 @@ int show_available_vars(struct perf_probe_event *pevs __unused,
}
#endif

+/*
+ * Stuff 'lr' according to the line range described by 'arg'.
+ * The line range syntax is described by:
+ *
+ * SRC[:SLN[+NUM|-ELN]]
+ * FNC[:SLN[+NUM|-ELN]]
+ */
int parse_line_range_desc(const char *arg, struct line_range *lr)
{
const char *ptr;
char *tmp;
- /*
- * <Syntax>
- * SRC:SLN[+NUM|-ELN]
- * FUNC[:SLN[+NUM|-ELN]]
- */
+
ptr = strchr(arg, ':');
if (ptr) {
lr->start = (int)strtoul(ptr + 1, &tmp, 0);
--
1.7.3.2


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