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SubjectRe: [PATCH 05/12] perf pmu: Fix pmu events parsing rule
On Thu, May 03, 2018 at 02:38:15PM +0300, Adrian Hunter wrote:

SNIP

> >>> index 7afeb80cc39e..d14464c42714 100644
> >>> --- a/tools/perf/util/parse-events.y
> >>> +++ b/tools/perf/util/parse-events.y
> >>> @@ -224,15 +224,15 @@ event_def: event_pmu |
> >>> event_bpf_file
> >>>
> >>> event_pmu:
> >>> -PE_NAME opt_event_config
> >>> +PE_NAME '/' event_config '/'
> >>
> >> These are not equivalent because opt_event_config allows '//'
> >> but event_config cannot be an empty string.
> >
> > yep, overlooked this one, how about patch below
>
> Seems to work but gives build warnings:
>
> util/parse-events.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
> util/parse-events.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]

I had to make an explicit rule, so I moved the original rule code
into separate function.. hence the patch is little bigger ;-)

cc-ing Kan Liang, who recently changed this code,

I'll still have to rebase this one his recent change,
once it gets in, but should be easy

jirka


---
tools/perf/util/parse-events.c | 43 +++++++++++++++++++++++++++++++++++
tools/perf/util/parse-events.h | 3 +++
tools/perf/util/parse-events.y | 51 +++++++++++++-----------------------------
3 files changed, 62 insertions(+), 35 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 2fb0272146d8..33e3fc147f35 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -8,6 +8,7 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/param.h>
+#include <fnmatch.h>
#include "term.h"
#include "../perf.h"
#include "evlist.h"
@@ -1287,6 +1288,48 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
return evsel ? 0 : -ENOMEM;
}

+int parse_events_pmu(struct parse_events_state *parse_state,
+ struct list_head *list, char *name,
+ struct list_head *head_config)
+{
+ struct list_head *orig_terms;
+ struct perf_pmu *pmu = NULL;
+ char *pattern = NULL;
+ int ok = 0;
+
+ if (!parse_events_add_pmu(parse_state, list, name, head_config, false))
+ return 0;
+
+ if (parse_events_copy_term_list(head_config, &orig_terms))
+ return -1;
+
+ if (asprintf(&pattern, "%s*", name) < 0)
+ goto out;
+
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ struct list_head *terms;
+ char *tmp = pmu->name;
+
+ if (!strncmp(tmp, "uncore_", 7) &&
+ strncmp(tmp, "uncore_", 7))
+ tmp += 7;
+ if (!fnmatch(pattern, tmp, 0)) {
+ if (parse_events_copy_term_list(orig_terms, &terms)) {
+ ok = 0;
+ goto out;
+ }
+ if (!parse_events_add_pmu(parse_state, list, pmu->name, terms, true))
+ ok++;
+ parse_events_terms__delete(terms);
+ }
+ }
+
+out:
+ parse_events_terms__delete(orig_terms);
+ free(pattern);
+ return ok ? 0 : -1;
+}
+
int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
char *str, struct list_head **listp)
{
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 5015cfd58277..743586213ee4 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -168,6 +168,9 @@ int parse_events_add_breakpoint(struct list_head *list, int *idx,
int parse_events_add_pmu(struct parse_events_state *parse_state,
struct list_head *list, char *name,
struct list_head *head_config, bool auto_merge_stats);
+int parse_events_pmu(struct parse_events_state *parse_state,
+ struct list_head *list, char *name,
+ struct list_head *head_config);

int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
char *str,
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d14464c42714..a93f8c660395 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -8,7 +8,6 @@

#define YYDEBUG 1

-#include <fnmatch.h>
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/types.h>
@@ -226,44 +225,26 @@ event_def: event_pmu |
event_pmu:
PE_NAME '/' event_config '/'
{
- struct list_head *list, *orig_terms, *terms;
+ struct list_head *list;
+
+ ALLOC_LIST(list);

- if (parse_events_copy_term_list($3, &orig_terms))
+ if (parse_events_pmu(_parse_state, list, $1, $3))
YYABORT;

- ALLOC_LIST(list);
- if (parse_events_add_pmu(_parse_state, list, $1, $3, false)) {
- struct perf_pmu *pmu = NULL;
- int ok = 0;
- char *pattern;
-
- if (asprintf(&pattern, "%s*", $1) < 0)
- YYABORT;
-
- while ((pmu = perf_pmu__scan(pmu)) != NULL) {
- char *name = pmu->name;
-
- if (!strncmp(name, "uncore_", 7) &&
- strncmp($1, "uncore_", 7))
- name += 7;
- if (!fnmatch(pattern, name, 0)) {
- if (parse_events_copy_term_list(orig_terms, &terms)) {
- free(pattern);
- YYABORT;
- }
- if (!parse_events_add_pmu(_parse_state, list, pmu->name, terms, true))
- ok++;
- parse_events_terms__delete(terms);
- }
- }
-
- free(pattern);
-
- if (!ok)
- YYABORT;
- }
parse_events_terms__delete($3);
- parse_events_terms__delete(orig_terms);
+ $$ = list;
+}
+|
+PE_NAME '/' '/'
+{
+ struct list_head *list;
+
+ ALLOC_LIST(list);
+
+ if (parse_events_pmu(_parse_state, list, $1, NULL))
+ YYABORT;
+
$$ = list;
}
|
--
2.13.6
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