perf tools: Revert enable indices setting syntax for BPF map

This reverts commit e571e029bdbf ("perf tools: Enable indices setting
syntax for BPF map").

The reverted commit added a notion of arrays that could be set as
event terms for BPF events. The parsing hasn't worked over multiple
Linux releases. Given the broken nature of the parsing it appears the
code isn't in use, nor could I find a way for it to be used to add a
test.

The original commit contains a test in the commit message,
however, running it yields:
```
$ perf record -e './test_bpf_map_3.c/map:channel.value[0,1,2,3...5]=101/' usleep 2
event syntax error: '..pf_map_3.c/map:channel.value[0,1,2,3...5]=101/'
                                  \___ parser error
Run 'perf list' for a list of valid events

 Usage: perf record [<options>] [<command>]
    or: perf record [<options>] -- <command> [<options>]

    -e, --event <event>   event selector. use 'perf list' to list available events
```

Given the code can't be used this commit reverts and removes it.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Wang ShaoBo <bobo.shaobowang@huawei.com>
Cc: YueHaibing <yuehaibing@huawei.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230728001212.457900-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index e17e96b..37614dc 100644 (file)
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -799,13 +799,7 @@ parse_events_config_bpf(struct parse_events_state *parse_state,
 
                        parse_events_error__handle(parse_state->error, idx,
                                                strdup(errbuf),
-                                               strdup(
-"Hint:\tValid config terms:\n"
-"     \tmap:[<arraymap>].value<indices>=[value]\n"
-"     \tmap:[<eventmap>].event<indices>=[event]\n"
-"\n"
-"     \twhere <indices> is something like [0,3...5] or [all]\n"
-"     \t(add -v to see detail)"));
+                                               NULL);
                        return err;
                }
        }

diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 99335ec..d7d084c 100644 (file)
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -175,7 +175,6 @@ do {                                                        \
 %x mem
 %s config
 %x event
-%x array
 
 group          [^,{}/]*[{][^}]*[}][^,{}/]*
 event_pmu      [^,{}/]+[/][^/]*[/][^,{}/]*
@@ -251,14 +250,6 @@ non_digit  [^0-9]
                }
 }
 
-<array>{
-"]"                    { BEGIN(config); return ']'; }
-{num_dec}              { return value(yyscanner, 10); }
-{num_hex}              { return value(yyscanner, 16); }
-,                      { return ','; }
-"\.\.\."               { return PE_ARRAY_RANGE; }
-}
-
 <config>{
        /*
         * Please update config_term_names when new static term is added.
@@ -302,8 +293,6 @@ r0x{num_raw_hex}    { return str(yyscanner, PE_RAW); }
 {lc_type}-{lc_op_result}       { return lc_str(yyscanner, _parse_state); }
 {lc_type}-{lc_op_result}-{lc_op_result}        { return lc_str(yyscanner, _parse_state); }
 {name_minus}           { return str(yyscanner, PE_NAME); }
-\[all\]                        { return PE_ARRAY_ALL; }
-"["                    { BEGIN(array); return '['; }
 @{drv_cfg_term}                { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
 }
 

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 251b7d2..c3517e3 100644 (file)
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -65,7 +65,6 @@ static void free_list_evsel(struct list_head* list_evsel)
 %token PE_LEGACY_CACHE
 %token PE_PREFIX_MEM
 %token PE_ERROR
-%token PE_ARRAY_ALL PE_ARRAY_RANGE
 %token PE_DRV_CFG_TERM
 %token PE_TERM_HW
 %type <num> PE_VALUE
@@ -109,11 +108,6 @@ static void free_list_evsel(struct list_head* list_evsel)
 %type <list_evsel> groups
 %destructor { free_list_evsel ($$); } <list_evsel>
 %type <tracepoint_name> tracepoint_name
-%destructor { free ($$.sys); free ($$.event); } <tracepoint_name>
-%type <array> array
-%type <array> array_term
-%type <array> array_terms
-%destructor { free ($$.ranges); } <array>
 %type <hardware_term> PE_TERM_HW
 %destructor { free ($$.str); } <hardware_term>
 
@@ -128,7 +122,6 @@ static void free_list_evsel(struct list_head* list_evsel)
                char *sys;
                char *event;
        } tracepoint_name;
-       struct parse_events_array array;
        struct hardware_term {
                char *str;
                u64 num;
@@ -879,121 +872,6 @@ PE_TERM
 
        $$ = term;
 }
-|
-name_or_raw array '=' name_or_legacy
-{
-       struct parse_events_term *term;
-       int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER, $1, $4, &@1, &@4);
-
-       if (err) {
-               free($1);
-               free($4);
-               free($2.ranges);
-               PE_ABORT(err);
-       }
-       term->array = $2;
-       $$ = term;
-}
-|
-name_or_raw array '=' PE_VALUE
-{
-       struct parse_events_term *term;
-       int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER, $1, $4, false, &@1, &@4);
-
-       if (err) {
-               free($1);
-               free($2.ranges);
-               PE_ABORT(err);
-       }
-       term->array = $2;
-       $$ = term;
-}
-|
-PE_DRV_CFG_TERM
-{
-       struct parse_events_term *term;
-       char *config = strdup($1);
-       int err;
-
-       if (!config)
-               YYNOMEM;
-       err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG, config, $1, &@1, NULL);
-       if (err) {
-               free($1);
-               free(config);
-               PE_ABORT(err);
-       }
-       $$ = term;
-}
-
-array:
-'[' array_terms ']'
-{
-       $$ = $2;
-}
-|
-PE_ARRAY_ALL
-{
-       $$.nr_ranges = 0;
-       $$.ranges = NULL;
-}
-
-array_terms:
-array_terms ',' array_term
-{
-       struct parse_events_array new_array;
-
-       new_array.nr_ranges = $1.nr_ranges + $3.nr_ranges;
-       new_array.ranges = realloc($1.ranges,
-                               sizeof(new_array.ranges[0]) *
-                               new_array.nr_ranges);
-       if (!new_array.ranges)
-               YYNOMEM;
-       memcpy(&new_array.ranges[$1.nr_ranges], $3.ranges,
-              $3.nr_ranges * sizeof(new_array.ranges[0]));
-       free($3.ranges);
-       $$ = new_array;
-}
-|
-array_term
-
-array_term:
-PE_VALUE
-{
-       struct parse_events_array array;
-
-       array.nr_ranges = 1;
-       array.ranges = malloc(sizeof(array.ranges[0]));
-       if (!array.ranges)
-               YYNOMEM;
-       array.ranges[0].start = $1;
-       array.ranges[0].length = 1;
-       $$ = array;
-}
-|
-PE_VALUE PE_ARRAY_RANGE PE_VALUE
-{
-       struct parse_events_array array;
-
-       if ($3 < $1) {
-               struct parse_events_state *parse_state = _parse_state;
-               struct parse_events_error *error = parse_state->error;
-               char *err_str;
-
-               if (asprintf(&err_str, "Expected '%ld' to be less-than '%ld'", $3, $1) < 0)
-                       err_str = NULL;
-
-               parse_events_error__handle(error, @1.first_column, err_str, NULL);
-               YYABORT;
-       }
-       array.nr_ranges = 1;
-       array.ranges = malloc(sizeof(array.ranges[0]));
-       if (!array.ranges)
-               YYNOMEM;
-       array.ranges[0].start = $1;
-       array.ranges[0].length = $3 - $1 + 1;
-       $$ = array;
-}
 
 sep_dc: ':' |