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Subject[tip:perf/core] perf tools: Fix legacy events symbol separator parsing
Commit-ID:  714a92d83fd1e20461f53549cfbee77b20be5032
Gitweb: https://git.kernel.org/tip/714a92d83fd1e20461f53549cfbee77b20be5032
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Wed, 13 Feb 2019 13:32:40 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 14 Feb 2019 15:18:08 -0300

perf tools: Fix legacy events symbol separator parsing

Fixing legacy symbol events parsing. We can't support single slash
separator, like 'cycles/u', because it conflicts with non empty terms,
like 'cycles/period/u'.

Keeping only '//' and ':' separator for these events:
cycles//u
cycles:k

And removing '/' separator support, which is not working
anymore. Also adding automated tests for above events.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190213123246.4015-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/parse-events.c | 30 ++++++++++++++++++++++++++++++
tools/perf/util/parse-events.y | 4 ++--
2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index 3b97ac018d5a..4a69c07f4101 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -1330,6 +1330,26 @@ static int test__checkevent_complex_name(struct perf_evlist *evlist)
return 0;
}

+static int test__sym_event_slash(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel = perf_evlist__first(evlist);
+
+ TEST_ASSERT_VAL("wrong type", evsel->attr.type == PERF_TYPE_HARDWARE);
+ TEST_ASSERT_VAL("wrong config", evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES);
+ TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
+ return 0;
+}
+
+static int test__sym_event_dc(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel = perf_evlist__first(evlist);
+
+ TEST_ASSERT_VAL("wrong type", evsel->attr.type == PERF_TYPE_HARDWARE);
+ TEST_ASSERT_VAL("wrong config", evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES);
+ TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
+ return 0;
+}
+
static int count_tracepoints(void)
{
struct dirent *events_ent;
@@ -1670,6 +1690,16 @@ static struct evlist_test test__events[] = {
.name = "cycles/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks'/Duk",
.check = test__checkevent_complex_name,
.id = 53
+ },
+ {
+ .name = "cycles//u",
+ .check = test__sym_event_slash,
+ .id = 54,
+ },
+ {
+ .name = "cycles:k",
+ .check = test__sym_event_dc,
+ .id = 55,
}
};

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index da8fe57691b8..44819bdb037d 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -311,7 +311,7 @@ value_sym '/' event_config '/'
$$ = list;
}
|
-value_sym sep_slash_dc
+value_sym sep_slash_slash_dc
{
struct list_head *list;
int type = $1 >> 16;
@@ -702,7 +702,7 @@ PE_VALUE PE_ARRAY_RANGE PE_VALUE

sep_dc: ':' |

-sep_slash_dc: '/' | ':' |
+sep_slash_slash_dc: '/' '/' | ':' |

%%

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