Re: [PATCH v2 3/5] perf pmu: Rename name matching for no suffix or wildcard variants

Liang, Kan
2025-01-30T19:29:14Z

On 2025-01-23 2:46 a.m., Ian Rogers wrote:
> Wildcard PMU naming will match a name like pmu_1 to a PMU name like
> pmu_10 but not to a PMU name like pmu_2 as the suffix forms part of
> the match. No suffix matching will match pmu_10 to either pmu_1 or
> pmu_2. Add or rename matching functions on PMU to make it clearer what
> kind of matching is being performed.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/perf/pmu-events/empty-pmu-events.c | 8 +-
> tools/perf/pmu-events/jevents.py | 8 +-
> tools/perf/tests/pmu.c | 85 ++++----
> tools/perf/util/parse-events.c | 2 +-
> tools/perf/util/pmu.c | 252 ++++++++++++++++-------
> tools/perf/util/pmu.h | 5 +-
> 6 files changed, 231 insertions(+), 129 deletions(-)
>
> diff --git a/tools/perf/pmu-events/empty-pmu-events.c b/tools/perf/pmu-events/empty-pmu-events.c
> index 1c7a2cfa321f..0cb7ba7912e8 100644
> --- a/tools/perf/pmu-events/empty-pmu-events.c
> +++ b/tools/perf/pmu-events/empty-pmu-events.c
> @@ -422,7 +422,7 @@ int pmu_events_table__for_each_event(const struct pmu_events_table *table,
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
> int ret;
>
> - if (pmu && !pmu__name_match(pmu, pmu_name))
> + if (pmu && !perf_pmu__name_wildcard_match(pmu, pmu_name))
> continue;
>
> ret = pmu_events_table__for_each_event_pmu(table, table_pmu, fn, data);
> @@ -443,7 +443,7 @@ int pmu_events_table__find_event(const struct pmu_events_table *table,
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
> int ret;
>
> - if (!pmu__name_match(pmu, pmu_name))
> + if (!perf_pmu__name_wildcard_match(pmu, pmu_name))
> continue;
>
> ret = pmu_events_table__find_event_pmu(table, table_pmu, name, fn, data);
> @@ -462,7 +462,7 @@ size_t pmu_events_table__num_events(const struct pmu_events_table *table,
> const struct pmu_table_entry *table_pmu = &table->pmus[i];
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
>
> - if (pmu__name_match(pmu, pmu_name))
> + if (perf_pmu__name_wildcard_match(pmu, pmu_name))
> count += table_pmu->num_entries;
> }
> return count;
> @@ -581,7 +581,7 @@ const struct pmu_events_table *perf_pmu__find_events_table(struct perf_pmu *pmu)
> const struct pmu_table_entry *table_pmu = &map->event_table.pmus[i];
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
>
> - if (pmu__name_match(pmu, pmu_name))
> + if (perf_pmu__name_wildcard_match(pmu, pmu_name))
> return &map->event_table;
> }
> return NULL;
> diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
> index 3e204700b59a..7499a35bfadd 100755
> --- a/tools/perf/pmu-events/jevents.py
> +++ b/tools/perf/pmu-events/jevents.py
> @@ -945,7 +945,7 @@ int pmu_events_table__for_each_event(const struct pmu_events_table *table,
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
> int ret;
>
> - if (pmu && !pmu__name_match(pmu, pmu_name))
> + if (pmu && !perf_pmu__name_wildcard_match(pmu, pmu_name))
> continue;
>
> ret = pmu_events_table__for_each_event_pmu(table, table_pmu, fn, data);
> @@ -966,7 +966,7 @@ int pmu_events_table__find_event(const struct pmu_events_table *table,
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
> int ret;
>
> - if (!pmu__name_match(pmu, pmu_name))
> + if (!perf_pmu__name_wildcard_match(pmu, pmu_name))
> continue;
>
> ret = pmu_events_table__find_event_pmu(table, table_pmu, name, fn, data);
> @@ -985,7 +985,7 @@ size_t pmu_events_table__num_events(const struct pmu_events_table *table,
> const struct pmu_table_entry *table_pmu = &table->pmus[i];
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
>
> - if (pmu__name_match(pmu, pmu_name))
> + if (perf_pmu__name_wildcard_match(pmu, pmu_name))
> count += table_pmu->num_entries;
> }
> return count;
> @@ -1104,7 +1104,7 @@ const struct pmu_events_table *perf_pmu__find_events_table(struct perf_pmu *pmu)
> const struct pmu_table_entry *table_pmu = &map->event_table.pmus[i];
> const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset];
>
> - if (pmu__name_match(pmu, pmu_name))
> + if (perf_pmu__name_wildcard_match(pmu, pmu_name))
> return &map->event_table;
> }
> return NULL;
> diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
> index 6a681e3fb552..4a9f8e090cf4 100644
> --- a/tools/perf/tests/pmu.c
> +++ b/tools/perf/tests/pmu.c
> @@ -452,9 +452,9 @@ static int test__name_cmp(struct test_suite *test __maybe_unused, int subtest __
> }
>
> /**
> - * Test perf_pmu__match() that's used to search for a PMU given a name passed
> + * Test perf_pmu__wildcard_match() that's used to search for a PMU given a name passed
> * on the command line. The name that's passed may also be a filename type glob
> - * match. If the name does not match, perf_pmu__match() attempts to match the
> + * match. If the name does not match, perf_pmu__wildcard_match() attempts to match the
> * alias of the PMU, if provided.
> */
> static int test__pmu_match(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
> @@ -463,41 +463,44 @@ static int test__pmu_match(struct test_suite *test __maybe_unused, int subtest _
> .name = "pmuname",
> };
>
> - TEST_ASSERT_EQUAL("Exact match", perf_pmu__match(&test_pmu, "pmuname"), true);
> - TEST_ASSERT_EQUAL("Longer token", perf_pmu__match(&test_pmu, "longertoken"), false);
> - TEST_ASSERT_EQUAL("Shorter token", perf_pmu__match(&test_pmu, "pmu"), false);
> +#define TEST_PMU_MATCH(msg, to_match, expect) \
> + TEST_ASSERT_EQUAL(msg, perf_pmu__wildcard_match(&test_pmu, to_match), expect)
> +
> + TEST_PMU_MATCH("Exact match", "pmuname", true);
> + TEST_PMU_MATCH("Longer token", "longertoken", false);
> + TEST_PMU_MATCH("Shorter token", "pmu", false);
>
> test_pmu.name = "pmuname_10";
> - TEST_ASSERT_EQUAL("Diff suffix_", perf_pmu__match(&test_pmu, "pmuname_2"), false);
> - TEST_ASSERT_EQUAL("Sub suffix_", perf_pmu__match(&test_pmu, "pmuname_1"), true);
> - TEST_ASSERT_EQUAL("Same suffix_", perf_pmu__match(&test_pmu, "pmuname_10"), true);
> - TEST_ASSERT_EQUAL("No suffix_", perf_pmu__match(&test_pmu, "pmuname"), true);
> - TEST_ASSERT_EQUAL("Underscore_", perf_pmu__match(&test_pmu, "pmuname_"), true);
> - TEST_ASSERT_EQUAL("Substring_", perf_pmu__match(&test_pmu, "pmuna"), false);
> + TEST_PMU_MATCH("Diff suffix_", "pmuname_2", false);
> + TEST_PMU_MATCH("Sub suffix_", "pmuname_1", true);
> + TEST_PMU_MATCH("Same suffix_", "pmuname_10", true);
> + TEST_PMU_MATCH("No suffix_", "pmuname", true);
> + TEST_PMU_MATCH("Underscore_", "pmuname_", true);
> + TEST_PMU_MATCH("Substring_", "pmuna", false);
>
> test_pmu.name = "pmuname_ab23";
> - TEST_ASSERT_EQUAL("Diff suffix hex_", perf_pmu__match(&test_pmu, "pmuname_2"), false);
> - TEST_ASSERT_EQUAL("Sub suffix hex_", perf_pmu__match(&test_pmu, "pmuname_ab"), true);
> - TEST_ASSERT_EQUAL("Same suffix hex_", perf_pmu__match(&test_pmu, "pmuname_ab23"), true);
> - TEST_ASSERT_EQUAL("No suffix hex_", perf_pmu__match(&test_pmu, "pmuname"), true);
> - TEST_ASSERT_EQUAL("Underscore hex_", perf_pmu__match(&test_pmu, "pmuname_"), true);
> - TEST_ASSERT_EQUAL("Substring hex_", perf_pmu__match(&test_pmu, "pmuna"), false);
> + TEST_PMU_MATCH("Diff suffix hex_", "pmuname_2", false);
> + TEST_PMU_MATCH("Sub suffix hex_", "pmuname_ab", true);
> + TEST_PMU_MATCH("Same suffix hex_", "pmuname_ab23", true);
> + TEST_PMU_MATCH("No suffix hex_", "pmuname", true);
> + TEST_PMU_MATCH("Underscore hex_", "pmuname_", true);
> + TEST_PMU_MATCH("Substring hex_", "pmuna", false);
>
> test_pmu.name = "pmuname10";
> - TEST_ASSERT_EQUAL("Diff suffix", perf_pmu__match(&test_pmu, "pmuname2"), false);
> - TEST_ASSERT_EQUAL("Sub suffix", perf_pmu__match(&test_pmu, "pmuname1"), true);
> - TEST_ASSERT_EQUAL("Same suffix", perf_pmu__match(&test_pmu, "pmuname10"), true);
> - TEST_ASSERT_EQUAL("No suffix", perf_pmu__match(&test_pmu, "pmuname"), true);
> - TEST_ASSERT_EQUAL("Underscore", perf_pmu__match(&test_pmu, "pmuname_"), false);
> - TEST_ASSERT_EQUAL("Substring", perf_pmu__match(&test_pmu, "pmuna"), false);
> + TEST_PMU_MATCH("Diff suffix", "pmuname2", false);
> + TEST_PMU_MATCH("Sub suffix", "pmuname1", true);
> + TEST_PMU_MATCH("Same suffix", "pmuname10", true);
> + TEST_PMU_MATCH("No suffix", "pmuname", true);
> + TEST_PMU_MATCH("Underscore", "pmuname_", false);
> + TEST_PMU_MATCH("Substring", "pmuna", false);
>
> test_pmu.name = "pmunameab23";
> - TEST_ASSERT_EQUAL("Diff suffix hex", perf_pmu__match(&test_pmu, "pmuname2"), false);
> - TEST_ASSERT_EQUAL("Sub suffix hex", perf_pmu__match(&test_pmu, "pmunameab"), true);
> - TEST_ASSERT_EQUAL("Same suffix hex", perf_pmu__match(&test_pmu, "pmunameab23"), true);
> - TEST_ASSERT_EQUAL("No suffix hex", perf_pmu__match(&test_pmu, "pmuname"), true);
> - TEST_ASSERT_EQUAL("Underscore hex", perf_pmu__match(&test_pmu, "pmuname_"), false);
> - TEST_ASSERT_EQUAL("Substring hex", perf_pmu__match(&test_pmu, "pmuna"), false);
> + TEST_PMU_MATCH("Diff suffix hex", "pmuname2", false);
> + TEST_PMU_MATCH("Sub suffix hex", "pmunameab", true);
> + TEST_PMU_MATCH("Same suffix hex", "pmunameab23", true);
> + TEST_PMU_MATCH("No suffix hex", "pmuname", true);
> + TEST_PMU_MATCH("Underscore hex", "pmuname_", false);
> + TEST_PMU_MATCH("Substring hex", "pmuna", false);
>
> /*
> * 2 hex chars or less are not considered suffixes so it shouldn't be
> @@ -505,7 +508,7 @@ static int test__pmu_match(struct test_suite *test __maybe_unused, int subtest _
> * false results here than above.
> */
> test_pmu.name = "pmuname_a3";
> - TEST_ASSERT_EQUAL("Diff suffix 2 hex_", perf_pmu__match(&test_pmu, "pmuname_2"), false);
> + TEST_PMU_MATCH("Diff suffix 2 hex_", "pmuname_2", false);
> /*
> * This one should be false, but because pmuname_a3 ends in 3 which is
> * decimal, it's not possible to determine if it's a short hex suffix or
> @@ -513,19 +516,19 @@ static int test__pmu_match(struct test_suite *test __maybe_unused, int subtest _
> * length of decimal suffix. Run the test anyway and expect the wrong
> * result. And slightly fuzzy matching shouldn't do too much harm.
> */
> - TEST_ASSERT_EQUAL("Sub suffix 2 hex_", perf_pmu__match(&test_pmu, "pmuname_a"), true);
> - TEST_ASSERT_EQUAL("Same suffix 2 hex_", perf_pmu__match(&test_pmu, "pmuname_a3"), true);
> - TEST_ASSERT_EQUAL("No suffix 2 hex_", perf_pmu__match(&test_pmu, "pmuname"), false);
> - TEST_ASSERT_EQUAL("Underscore 2 hex_", perf_pmu__match(&test_pmu, "pmuname_"), false);
> - TEST_ASSERT_EQUAL("Substring 2 hex_", perf_pmu__match(&test_pmu, "pmuna"), false);
> + TEST_PMU_MATCH("Sub suffix 2 hex_", "pmuname_a", true);
> + TEST_PMU_MATCH("Same suffix 2 hex_", "pmuname_a3", true);
> + TEST_PMU_MATCH("No suffix 2 hex_", "pmuname", false);
> + TEST_PMU_MATCH("Underscore 2 hex_", "pmuname_", false);
> + TEST_PMU_MATCH("Substring 2 hex_", "pmuna", false);
>
> test_pmu.name = "pmuname_5";
> - TEST_ASSERT_EQUAL("Glob 1", perf_pmu__match(&test_pmu, "pmu*"), true);
> - TEST_ASSERT_EQUAL("Glob 2", perf_pmu__match(&test_pmu, "nomatch*"), false);
> - TEST_ASSERT_EQUAL("Seq 1", perf_pmu__match(&test_pmu, "pmuname_[12345]"), true);
> - TEST_ASSERT_EQUAL("Seq 2", perf_pmu__match(&test_pmu, "pmuname_[67890]"), false);
> - TEST_ASSERT_EQUAL("? 1", perf_pmu__match(&test_pmu, "pmuname_?"), true);
> - TEST_ASSERT_EQUAL("? 2", perf_pmu__match(&test_pmu, "pmuname_1?"), false);
> + TEST_PMU_MATCH("Glob 1", "pmu*", true);
> + TEST_PMU_MATCH("Glob 2", "nomatch*", false);
> + TEST_PMU_MATCH("Seq 1", "pmuname_[12345]", true);
> + TEST_PMU_MATCH("Seq 2", "pmuname_[67890]", false);
> + TEST_PMU_MATCH("? 1", "pmuname_?", true);
> + TEST_PMU_MATCH("? 2", "pmuname_1?", false);
>
> return TEST_OK;
> }
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 1e23faa364b1..6c36b98875bc 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -1660,7 +1660,7 @@ int parse_events_multi_pmu_add_or_add_pmu(struct parse_events_state *parse_state
> /* Failed to add, try wildcard expansion of event_or_pmu as a PMU name. */
> while ((pmu = perf_pmus__scan(pmu)) != NULL) {
> if (!parse_events__filter_pmu(parse_state, pmu) &&
> - perf_pmu__match(pmu, event_or_pmu)) {
> + perf_pmu__wildcard_match(pmu, event_or_pmu)) {
> bool auto_merge_stats = perf_pmu__auto_merge_stats(pmu);
>
> if (!parse_events_add_pmu(parse_state, *listp, pmu,
> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> index 6206c8fe2bf9..4c6f9a1a9461 100644
> --- a/tools/perf/util/pmu.c
> +++ b/tools/perf/util/pmu.c
> @@ -847,21 +847,23 @@ static size_t pmu_deduped_name_len(const struct perf_pmu *pmu, const char *name,
> }
>
> /**
> - * perf_pmu__match_ignoring_suffix - Does the pmu_name match tok ignoring any
> - * trailing suffix? The Suffix must be in form
> - * tok_{digits}, or tok{digits}.
> + * perf_pmu__match_wildcard - Does the pmu_name start with tok and is then only
> + * followed by nothing or a suffix? tok may contain
> + * part of a suffix.
> * @pmu_name: The pmu_name with possible suffix.
> - * @tok: The possible match to pmu_name without suffix.
> + * @tok: The wildcard argument to match.
> */
> -static bool perf_pmu__match_ignoring_suffix(const char *pmu_name, const char *tok)
> +static bool perf_pmu__match_wildcard(const char *pmu_name, const char *tok)
> {
> const char *p, *suffix;
> bool has_hex = false;
> + size_t tok_len = strlen(tok);
>
> - if (strncmp(pmu_name, tok, strlen(tok)))
> + /* Check start of pmu_name for equality. */
> + if (strncmp(pmu_name, tok, tok_len))
> return false;
>
> - suffix = p = pmu_name + strlen(tok);
> + suffix = p = pmu_name + tok_len;
> if (*p == 0)
> return true;
>
> @@ -887,60 +889,80 @@ static bool perf_pmu__match_ignoring_suffix(const char *pmu_name, const char *to
> }
>
> /**
> - * pmu_uncore_alias_match - does name match the PMU name?
> - * @pmu_name: the json struct pmu_event name. This may lack a suffix (which
> + * perf_pmu__match_ignoring_suffix_uncore - Does the pmu_name match tok ignoring
> + * any trailing suffix on pmu_name and
> + * tok? The Suffix must be in form
> + * tok_{digits}, or tok{digits}.
> + * @pmu_name: The pmu_name with possible suffix.
> + * @tok: The possible match to pmu_name.
> + */
> +static bool perf_pmu__match_ignoring_suffix_uncore(const char *pmu_name, const char *tok)
> +{
> + size_t pmu_name_len, tok_len;
> +

if (!pmu_name)
return false;

I got a segmentfault when I try the code because of a NULL pmu_name.

Thanks,
Kan

> + /* uncore_ prefixes are ignored. */
> + if (!strncmp(pmu_name, "uncore_", 7))
> + pmu_name += 7;
> + if (!strncmp(tok, "uncore_", 7))
> + tok += 7;
> +
> + pmu_name_len = pmu_name_len_no_suffix(pmu_name);
> + tok_len = pmu_name_len_no_suffix(tok);
> + if (pmu_name_len != tok_len)
> + return false;
> +
> + return strncmp(pmu_name, tok, pmu_name_len) == 0;
> +}
> +
> +
> +/**
> + * perf_pmu__match_wildcard_uncore - does to_match match the PMU's name?
> + * @pmu_name: The pmu->name or pmu->alias to match against.
> + * @to_match: the json struct pmu_event name. This may lack a suffix (which
> * matches) or be of the form "socket,pmuname" which will match
> * "socketX_pmunameY".
> - * @name: a real full PMU name as from sysfs.
> */
> -static bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
> +static bool perf_pmu__match_wildcard_uncore(const char *pmu_name, const char *to_match)
> {
> - char *tmp = NULL, *tok, *str;
> - bool res;
> + char *mutable_to_match, *tok, *tmp;
>
> - if (strchr(pmu_name, ',') == NULL)
> - return perf_pmu__match_ignoring_suffix(name, pmu_name);
> -
> - str = strdup(pmu_name);
> - if (!str)
> + if (!pmu_name)
> return false;
>
> - /*
> - * uncore alias may be from different PMU with common prefix
> - */
> - tok = strtok_r(str, ",", &tmp);
> - if (strncmp(pmu_name, tok, strlen(tok))) {
> - res = false;
> - goto out;
> - }
> + /* uncore_ prefixes are ignored. */
> + if (!strncmp(pmu_name, "uncore_", 7))
> + pmu_name += 7;
> + if (!strncmp(to_match, "uncore_", 7))
> + to_match += 7;
>
> - /*
> - * Match more complex aliases where the alias name is a comma-delimited
> - * list of tokens, orderly contained in the matching PMU name.
> - *
> - * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we
> - * match "socket" in "socketX_pmunameY" and then "pmuname" in
> - * "pmunameY".
> - */
> - while (1) {
> - char *next_tok = strtok_r(NULL, ",", &tmp);
> + if (strchr(to_match, ',') == NULL)
> + return perf_pmu__match_wildcard(pmu_name, to_match);
>
> - name = strstr(name, tok);
> - if (!name ||
> - (!next_tok && !perf_pmu__match_ignoring_suffix(name, tok))) {
> - res = false;
> - goto out;
> + /* Process comma separated list of PMU name components. */
> + mutable_to_match = strdup(to_match);
> + if (!mutable_to_match)
> + return false;
> +
> + tok = strtok_r(mutable_to_match, ",", &tmp);
> + while (tok) {
> + size_t tok_len = strlen(tok);
> +
> + if (strncmp(pmu_name, tok, tok_len)) {
> + /* Mismatch between part of pmu_name and tok. */
> + free(mutable_to_match);
> + return false;
> }
> - if (!next_tok)
> - break;
> - tok = next_tok;
> - name += strlen(tok);
> + /* Move pmu_name forward over tok and suffix. */
> + pmu_name += tok_len;
> + while (*pmu_name != '\0' && isdigit(*pmu_name))
> + pmu_name++;
> + if (*pmu_name == '_')
> + pmu_name++;
> +
> + tok = strtok_r(NULL, ",", &tmp);
> }
> -
> - res = true;
> -out:
> - free(str);
> - return res;
> + free(mutable_to_match);
> + return *pmu_name == '\0';
> }
>
> bool pmu_uncore_identifier_match(const char *compat, const char *id)
> @@ -1003,11 +1025,19 @@ static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
> {
> struct perf_pmu *pmu = vdata;
>
> - if (!pe->compat || !pe->pmu)
> + if (!pe->compat || !pe->pmu) {
> + /* No data to match. */
> return 0;
> + }
> +
> + if (!perf_pmu__match_wildcard_uncore(pmu->name, pe->pmu) &&
> + !perf_pmu__match_wildcard_uncore(pmu->alias_name, pe->pmu)) {
> + /* PMU name/alias_name don't match. */
> + return 0;
> + }
>
> - if (pmu_uncore_alias_match(pe->pmu, pmu->name) &&
> - pmu_uncore_identifier_match(pe->compat, pmu->id)) {
> + if (pmu_uncore_identifier_match(pe->compat, pmu->id)) {
> + /* Id matched. */
> perf_pmu__new_alias(pmu,
> pe->name,
> pe->desc,
> @@ -1016,7 +1046,6 @@ static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
> pe,
> EVENT_SRC_SYS_JSON);
> }
> -
> return 0;
> }
>
> @@ -1974,15 +2003,82 @@ int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus,
> return ret;
> }
>
> -bool pmu__name_match(const struct perf_pmu *pmu, const char *pmu_name)
> +static bool perf_pmu___name_match(const struct perf_pmu *pmu, const char *to_match, bool wildcard)
> {
> - return !strcmp(pmu->name, pmu_name) ||
> - (pmu->is_uncore && pmu_uncore_alias_match(pmu_name, pmu->name)) ||
> + const char *names[2] = {
> + pmu->name,
> + pmu->alias_name,
> + };
> + if (pmu->is_core) {
> + for (size_t i = 0; i < ARRAY_SIZE(names); i++) {
> + const char *name = names[i];
> +
> + if (!name)
> + continue;
> +
> + if (!strcmp(name, to_match)) {
> + /* Exact name match. */
> + return true;
> + }
> + }
> + if (!strcmp(to_match, "default_core")) {
> + /*
> + * jevents and tests use default_core as a marker for any core
> + * PMU as the PMU name varies across architectures.
> + */
> + return true;
> + }
> + return false;
> + }
> + if (!pmu->is_uncore) {
> /*
> - * jevents and tests use default_core as a marker for any core
> - * PMU as the PMU name varies across architectures.
> + * PMU isn't core or uncore, some kind of broken CPU mask
> + * situation. Only match exact name.
> */
> - (pmu->is_core && !strcmp(pmu_name, "default_core"));
> + for (size_t i = 0; i < ARRAY_SIZE(names); i++) {
> + const char *name = names[i];
> +
> + if (!name)
> + continue;
> +
> + if (!strcmp(name, to_match)) {
> + /* Exact name match. */
> + return true;
> + }
> + }
> + return false;
> + }
> + for (size_t i = 0; i < ARRAY_SIZE(names); i++) {
> + const char *name = names[i];
> +
> + if (wildcard && perf_pmu__match_wildcard_uncore(name, to_match))
> + return true;
> + if (!wildcard && perf_pmu__match_ignoring_suffix_uncore(name, to_match))
> + return true;
> + }
> + return false;
> +}
> +
> +/**
> + * perf_pmu__name_wildcard_match - Called by the jevents generated code to see
> + * if pmu matches the json to_match string.
> + * @pmu: The pmu whose name/alias to match.
> + * @to_match: The possible match to pmu_name.
> + */
> +bool perf_pmu__name_wildcard_match(const struct perf_pmu *pmu, const char *to_match)
> +{
> + return perf_pmu___name_match(pmu, to_match, /*wildcard=*/true);
> +}
> +
> +/**
> + * perf_pmu__name_no_suffix_match - Does pmu's name match to_match ignoring any
> + * trailing suffix on the pmu_name and/or tok?
> + * @pmu: The pmu whose name/alias to match.
> + * @to_match: The possible match to pmu_name.
> + */
> +bool perf_pmu__name_no_suffix_match(const struct perf_pmu *pmu, const char *to_match)
> +{
> + return perf_pmu___name_match(pmu, to_match, /*wildcard=*/false);
> }
>
> bool perf_pmu__is_software(const struct perf_pmu *pmu)
> @@ -2229,29 +2325,31 @@ void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config,
> name ?: "N/A", buf, config_name, config);
> }
>
> -bool perf_pmu__match(const struct perf_pmu *pmu, const char *tok)
> +bool perf_pmu__wildcard_match(const struct perf_pmu *pmu, const char *wildcard_to_match)
> {
> - const char *name = pmu->name;
> - bool need_fnmatch = strisglob(tok);
> + const char *names[2] = {
> + pmu->name,
> + pmu->alias_name,
> + };
> + bool need_fnmatch = strisglob(wildcard_to_match);
>
> - if (!strncmp(tok, "uncore_", 7))
> - tok += 7;
> - if (!strncmp(name, "uncore_", 7))
> - name += 7;
> + if (!strncmp(wildcard_to_match, "uncore_", 7))
> + wildcard_to_match += 7;
>
> - if (perf_pmu__match_ignoring_suffix(name, tok) ||
> - (need_fnmatch && !fnmatch(tok, name, 0)))
> - return true;
> + for (size_t i = 0; i < ARRAY_SIZE(names); i++) {
> + const char *pmu_name = names[i];
>
> - name = pmu->alias_name;
> - if (!name)
> - return false;
> + if (!pmu_name)
> + continue;
>
> - if (!strncmp(name, "uncore_", 7))
> - name += 7;
> + if (!strncmp(pmu_name, "uncore_", 7))
> + pmu_name += 7;
>
> - return perf_pmu__match_ignoring_suffix(name, tok) ||
> - (need_fnmatch && !fnmatch(tok, name, 0));
> + if (perf_pmu__match_wildcard(pmu_name, wildcard_to_match) ||
> + (need_fnmatch && !fnmatch(wildcard_to_match, pmu_name, 0)))
> + return true;
> + }
> + return false;
> }
>
> int perf_pmu__event_source_devices_scnprintf(char *pathname, size_t size)
> diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
> index edd36c20aedc..f5306428c03f 100644
> --- a/tools/perf/util/pmu.h
> +++ b/tools/perf/util/pmu.h
> @@ -240,7 +240,8 @@ bool perf_pmu__have_event(struct perf_pmu *pmu, const char *name);
> size_t perf_pmu__num_events(struct perf_pmu *pmu);
> int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus,
> void *state, pmu_event_callback cb);
> -bool pmu__name_match(const struct perf_pmu *pmu, const char *pmu_name);
> +bool perf_pmu__name_wildcard_match(const struct perf_pmu *pmu, const char *to_match);
> +bool perf_pmu__name_no_suffix_match(const struct perf_pmu *pmu, const char *to_match);
>
> /**
> * perf_pmu_is_software - is the PMU a software PMU as in it uses the
> @@ -275,7 +276,7 @@ void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config,
> const char *config_name);
> void perf_pmu__warn_invalid_formats(struct perf_pmu *pmu);
>
> -bool perf_pmu__match(const struct perf_pmu *pmu, const char *tok);
> +bool perf_pmu__wildcard_match(const struct perf_pmu *pmu, const char *wildcard_to_match);
>
> int perf_pmu__event_source_devices_scnprintf(char *pathname, size_t size);
> int perf_pmu__pathname_scnprintf(char *buf, size_t size,