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| author | Jiri Olsa <jolsa@redhat.com> | 2012-11-13 15:32:58 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-11-14 16:52:24 -0300 |
| commit | 534123f458f196bcc269f97d20ccf125925c2e7b (patch) | |
| tree | c9da5a679374bc971b734f5ad4d43b3fc16dd76b /tools/perf | |
| parent | 3fe4430dd66837d8fcdb63c167e908655fc842e3 (diff) | |
| download | linux-stable-534123f458f196bcc269f97d20ccf125925c2e7b.tar.gz linux-stable-534123f458f196bcc269f97d20ccf125925c2e7b.tar.bz2 linux-stable-534123f458f196bcc269f97d20ccf125925c2e7b.zip | |
perf tools: Add basic event modifier sanity check
Updating event parser to allow any non zero string containing [ukhpGH]
characters for event modifier.
The modifier sanity is checked later in parse-event object logic. The
check validates modifier to contain only one instance of any modifier
(apart from 'p') present.
v2:
- added length check suggested Namhyung Kim
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20121113143258.GA2481@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/parse-events.c | 24 | ||||
| -rw-r--r-- | tools/perf/util/parse-events.l | 2 |
2 files changed, 25 insertions, 1 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index c0b785b50849..020323af3364 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -722,6 +722,27 @@ static int get_event_modifier(struct event_modifier *mod, char *str, return 0; } +/* + * Basic modifier sanity check to validate it contains only one + * instance of any modifier (apart from 'p') present. + */ +static int check_modifier(char *str) +{ + char *p = str; + + /* The sizeof includes 0 byte as well. */ + if (strlen(str) > (sizeof("ukhGHppp") - 1)) + return -1; + + while (*p) { + if (*p != 'p' && strchr(p + 1, *p)) + return -1; + p++; + } + + return 0; +} + int parse_events__modifier_event(struct list_head *list, char *str, bool add) { struct perf_evsel *evsel; @@ -730,6 +751,9 @@ int parse_events__modifier_event(struct list_head *list, char *str, bool add) if (str == NULL) return 0; + if (check_modifier(str)) + return -EINVAL; + if (!add && get_event_modifier(&mod, str, NULL)) return -EINVAL; diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index 66959fab6634..e9d1134c2c68 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -82,7 +82,7 @@ num_hex 0x[a-fA-F0-9]+ num_raw_hex [a-fA-F0-9]+ name [a-zA-Z_*?][a-zA-Z0-9_*?]* name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?]* -modifier_event [ukhpGH]{1,8} +modifier_event [ukhpGH]+ modifier_bp [rwx]{1,3} %% |