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Date: Sun, 7 Nov 2021 12:34:41 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
John Garry <john.garry@...wei.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
eranian@...gle.com
Subject: Re: [PATCH v2 1/3] perf parse-events: Rename parse_events_error
functions
Em Sun, Nov 07, 2021 at 01:00:00AM -0800, Ian Rogers escreveu:
> Group error functions and name after the data type they manipulate.
Sensible, applied.
- Arnaldo
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
> tools/perf/bench/evlist-open-close.c | 2 +-
> tools/perf/builtin-stat.c | 10 +--
> tools/perf/builtin-trace.c | 2 +-
> tools/perf/tests/expand-cgroup.c | 2 +-
> tools/perf/tests/parse-events.c | 2 +-
> tools/perf/util/metricgroup.c | 2 +-
> tools/perf/util/parse-events.c | 116 +++++++++++++--------------
> tools/perf/util/parse-events.h | 8 +-
> tools/perf/util/parse-events.y | 4 +-
> tools/perf/util/pmu.c | 8 +-
> 10 files changed, 78 insertions(+), 78 deletions(-)
>
> diff --git a/tools/perf/bench/evlist-open-close.c b/tools/perf/bench/evlist-open-close.c
> index 75a53919126b..3f9518936367 100644
> --- a/tools/perf/bench/evlist-open-close.c
> +++ b/tools/perf/bench/evlist-open-close.c
> @@ -89,7 +89,7 @@ static struct evlist *bench__create_evlist(char *evstr)
>
> ret = parse_events(evlist, evstr, &err);
> if (ret) {
> - parse_events_print_error(&err, evstr);
> + parse_events_error__print(&err, evstr);
> pr_err("Run 'perf list' for a list of valid events\n");
> ret = 1;
> goto out_delete_evlist;
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index f0ecfda34ece..af447a179d84 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1782,7 +1782,7 @@ static int add_default_attributes(void)
> &errinfo);
> if (err) {
> fprintf(stderr, "Cannot set up transaction events\n");
> - parse_events_print_error(&errinfo, transaction_attrs);
> + parse_events_error__print(&errinfo, transaction_attrs);
> return -1;
> }
> return 0;
> @@ -1812,11 +1812,11 @@ static int add_default_attributes(void)
> } else {
> fprintf(stderr, "To measure SMI cost, it needs "
> "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
> - parse_events_print_error(&errinfo, smi_cost_attrs);
> + parse_events_error__print(&errinfo, smi_cost_attrs);
> return -1;
> }
> if (err) {
> - parse_events_print_error(&errinfo, smi_cost_attrs);
> + parse_events_error__print(&errinfo, smi_cost_attrs);
> fprintf(stderr, "Cannot set up SMI cost events\n");
> return -1;
> }
> @@ -1883,7 +1883,7 @@ static int add_default_attributes(void)
> fprintf(stderr,
> "Cannot set up top down events %s: %d\n",
> str, err);
> - parse_events_print_error(&errinfo, str);
> + parse_events_error__print(&errinfo, str);
> free(str);
> return -1;
> }
> @@ -1911,7 +1911,7 @@ static int add_default_attributes(void)
> fprintf(stderr,
> "Cannot set up hybrid events %s: %d\n",
> hybrid_str, err);
> - parse_events_print_error(&errinfo, hybrid_str);
> + parse_events_error__print(&errinfo, hybrid_str);
> return -1;
> }
> return err;
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 2f1d20553a0a..7f0acc94e9ac 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -4928,7 +4928,7 @@ int cmd_trace(int argc, const char **argv)
> bzero(&parse_err, sizeof(parse_err));
> err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
> if (err) {
> - parse_events_print_error(&parse_err, trace.perfconfig_events);
> + parse_events_error__print(&parse_err, trace.perfconfig_events);
> goto out;
> }
> }
> diff --git a/tools/perf/tests/expand-cgroup.c b/tools/perf/tests/expand-cgroup.c
> index aaad51aba12f..57b4c5f30324 100644
> --- a/tools/perf/tests/expand-cgroup.c
> +++ b/tools/perf/tests/expand-cgroup.c
> @@ -128,7 +128,7 @@ static int expand_group_events(void)
> if (ret < 0) {
> pr_debug("failed to parse event '%s', err %d, str '%s'\n",
> event_str, ret, err.str);
> - parse_events_print_error(&err, event_str);
> + parse_events_error__print(&err, event_str);
> goto out;
> }
>
> diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
> index 8875e388563e..e200af986613 100644
> --- a/tools/perf/tests/parse-events.c
> +++ b/tools/perf/tests/parse-events.c
> @@ -2059,7 +2059,7 @@ static int test_event(struct evlist_test *e)
> if (ret) {
> pr_debug("failed to parse event '%s', err %d, str '%s'\n",
> e->name, ret, err.str);
> - parse_events_print_error(&err, e->name);
> + parse_events_error__print(&err, e->name);
> } else {
> ret = e->check(evlist);
> }
> diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> index 4917e9704765..edd7180b24e4 100644
> --- a/tools/perf/util/metricgroup.c
> +++ b/tools/perf/util/metricgroup.c
> @@ -1342,7 +1342,7 @@ static int parse_ids(struct perf_pmu *fake_pmu, struct expr_parse_ctx *ids,
> bzero(&parse_error, sizeof(parse_error));
> ret = __parse_events(parsed_evlist, events.buf, &parse_error, fake_pmu);
> if (ret) {
> - parse_events_print_error(&parse_error, events.buf);
> + parse_events_error__print(&parse_error, events.buf);
> goto err_out;
> }
> ret = decode_all_metric_ids(parsed_evlist, modifier);
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 278199ed788b..75cafb9a0720 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -191,39 +191,6 @@ static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
>
> #define MAX_EVENT_LENGTH 512
>
> -void parse_events__handle_error(struct parse_events_error *err, int idx,
> - char *str, char *help)
> -{
> - if (WARN(!str, "WARNING: failed to provide error string\n")) {
> - free(help);
> - return;
> - }
> - switch (err->num_errors) {
> - case 0:
> - err->idx = idx;
> - err->str = str;
> - err->help = help;
> - break;
> - case 1:
> - err->first_idx = err->idx;
> - err->idx = idx;
> - err->first_str = err->str;
> - err->str = str;
> - err->first_help = err->help;
> - err->help = help;
> - break;
> - default:
> - pr_debug("Multiple errors dropping message: %s (%s)\n",
> - err->str, err->help);
> - free(err->str);
> - err->str = str;
> - free(err->help);
> - err->help = help;
> - break;
> - }
> - err->num_errors++;
> -}
> -
> struct tracepoint_path *tracepoint_id_to_path(u64 config)
> {
> struct tracepoint_path *path = NULL;
> @@ -587,7 +554,7 @@ static void tracepoint_error(struct parse_events_error *e, int err,
> }
>
> tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
> - parse_events__handle_error(e, 0, strdup(str), strdup(help));
> + parse_events_error__handle(e, 0, strdup(str), strdup(help));
> }
>
> static int add_tracepoint(struct list_head *list, int *idx,
> @@ -811,7 +778,7 @@ int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
>
> return 0;
> errout:
> - parse_events__handle_error(parse_state->error, 0,
> + parse_events_error__handle(parse_state->error, 0,
> strdup(errbuf), strdup("(add -v to see detail)"));
> return err;
> }
> @@ -831,7 +798,7 @@ parse_events_config_bpf(struct parse_events_state *parse_state,
> int err;
>
> if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
> - parse_events__handle_error(parse_state->error, term->err_term,
> + parse_events_error__handle(parse_state->error, term->err_term,
> strdup("Invalid config term for BPF object"),
> NULL);
> return -EINVAL;
> @@ -851,7 +818,7 @@ parse_events_config_bpf(struct parse_events_state *parse_state,
> else
> idx = term->err_term + error_pos;
>
> - parse_events__handle_error(parse_state->error, idx,
> + parse_events_error__handle(parse_state->error, idx,
> strdup(errbuf),
> strdup(
> "Hint:\tValid config terms:\n"
> @@ -923,7 +890,7 @@ int parse_events_load_bpf(struct parse_events_state *parse_state,
> -err, errbuf,
> sizeof(errbuf));
>
> - parse_events__handle_error(parse_state->error, 0,
> + parse_events_error__handle(parse_state->error, 0,
> strdup(errbuf), strdup("(add -v to see detail)"));
> return err;
> }
> @@ -947,7 +914,7 @@ int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
> struct bpf_object *obj __maybe_unused,
> struct list_head *head_config __maybe_unused)
> {
> - parse_events__handle_error(parse_state->error, 0,
> + parse_events_error__handle(parse_state->error, 0,
> strdup("BPF support is not compiled"),
> strdup("Make sure libbpf-devel is available at build time."));
> return -ENOTSUP;
> @@ -959,7 +926,7 @@ int parse_events_load_bpf(struct parse_events_state *parse_state,
> bool source __maybe_unused,
> struct list_head *head_config __maybe_unused)
> {
> - parse_events__handle_error(parse_state->error, 0,
> + parse_events_error__handle(parse_state->error, 0,
> strdup("BPF support is not compiled"),
> strdup("Make sure libbpf-devel is available at build time."));
> return -ENOTSUP;
> @@ -1042,7 +1009,7 @@ static int check_type_val(struct parse_events_term *term,
> return 0;
>
> if (err) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> type == PARSE_EVENTS__TERM_TYPE_NUM
> ? strdup("expected numeric value")
> : strdup("expected string value"),
> @@ -1087,7 +1054,7 @@ config_term_avail(int term_type, struct parse_events_error *err)
> char *err_str;
>
> if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
> - parse_events__handle_error(err, -1,
> + parse_events_error__handle(err, -1,
> strdup("Invalid term_type"), NULL);
> return false;
> }
> @@ -1110,7 +1077,7 @@ config_term_avail(int term_type, struct parse_events_error *err)
> /* term_type is validated so indexing is safe */
> if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
> config_term_names[term_type]) >= 0)
> - parse_events__handle_error(err, -1, err_str, NULL);
> + parse_events_error__handle(err, -1, err_str, NULL);
> return false;
> }
> }
> @@ -1154,7 +1121,7 @@ do { \
> if (strcmp(term->val.str, "no") &&
> parse_branch_str(term->val.str,
> &attr->branch_sample_type)) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> strdup("invalid branch sample type"),
> NULL);
> return -EINVAL;
> @@ -1163,7 +1130,7 @@ do { \
> case PARSE_EVENTS__TERM_TYPE_TIME:
> CHECK_TYPE_VAL(NUM);
> if (term->val.num > 1) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> strdup("expected 0 or 1"),
> NULL);
> return -EINVAL;
> @@ -1202,7 +1169,7 @@ do { \
> case PARSE_EVENTS__TERM_TYPE_PERCORE:
> CHECK_TYPE_VAL(NUM);
> if ((unsigned int)term->val.num > 1) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> strdup("expected 0 or 1"),
> NULL);
> return -EINVAL;
> @@ -1214,14 +1181,14 @@ do { \
> case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
> CHECK_TYPE_VAL(NUM);
> if (term->val.num > UINT_MAX) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> strdup("too big"),
> NULL);
> return -EINVAL;
> }
> break;
> default:
> - parse_events__handle_error(err, term->err_term,
> + parse_events_error__handle(err, term->err_term,
> strdup("unknown term"),
> parse_events_formats_error_string(NULL));
> return -EINVAL;
> @@ -1275,7 +1242,7 @@ static int config_term_tracepoint(struct perf_event_attr *attr,
> return config_term_common(attr, term, err);
> default:
> if (err) {
> - parse_events__handle_error(err, term->err_term,
> + parse_events_error__handle(err, term->err_term,
> strdup("unknown term"),
> strdup("valid terms: call-graph,stack-size\n"));
> }
> @@ -1574,7 +1541,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
> if (asprintf(&err_str,
> "Cannot find PMU `%s'. Missing kernel support?",
> name) >= 0)
> - parse_events__handle_error(err, 0, err_str, NULL);
> + parse_events_error__handle(err, 0, err_str, NULL);
> return -EINVAL;
> }
>
> @@ -2334,6 +2301,39 @@ int __parse_events(struct evlist *evlist, const char *str,
> return ret;
> }
>
> +void parse_events_error__handle(struct parse_events_error *err, int idx,
> + char *str, char *help)
> +{
> + if (WARN(!str, "WARNING: failed to provide error string\n")) {
> + free(help);
> + return;
> + }
> + switch (err->num_errors) {
> + case 0:
> + err->idx = idx;
> + err->str = str;
> + err->help = help;
> + break;
> + case 1:
> + err->first_idx = err->idx;
> + err->idx = idx;
> + err->first_str = err->str;
> + err->str = str;
> + err->first_help = err->help;
> + err->help = help;
> + break;
> + default:
> + pr_debug("Multiple errors dropping message: %s (%s)\n",
> + err->str, err->help);
> + free(err->str);
> + err->str = str;
> + free(err->help);
> + err->help = help;
> + break;
> + }
> + err->num_errors++;
> +}
> +
> #define MAX_WIDTH 1000
> static int get_term_width(void)
> {
> @@ -2343,8 +2343,8 @@ static int get_term_width(void)
> return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
> }
>
> -static void __parse_events_print_error(int err_idx, const char *err_str,
> - const char *err_help, const char *event)
> +static void __parse_events_error__print(int err_idx, const char *err_str,
> + const char *err_help, const char *event)
> {
> const char *str = "invalid or unsupported event: ";
> char _buf[MAX_WIDTH];
> @@ -2398,19 +2398,19 @@ static void __parse_events_print_error(int err_idx, const char *err_str,
> }
> }
>
> -void parse_events_print_error(struct parse_events_error *err,
> - const char *event)
> +void parse_events_error__print(struct parse_events_error *err,
> + const char *event)
> {
> if (!err->num_errors)
> return;
>
> - __parse_events_print_error(err->idx, err->str, err->help, event);
> + __parse_events_error__print(err->idx, err->str, err->help, event);
> zfree(&err->str);
> zfree(&err->help);
>
> if (err->num_errors > 1) {
> fputs("\nInitial error:\n", stderr);
> - __parse_events_print_error(err->first_idx, err->first_str,
> + __parse_events_error__print(err->first_idx, err->first_str,
> err->first_help, event);
> zfree(&err->first_str);
> zfree(&err->first_help);
> @@ -2430,7 +2430,7 @@ int parse_events_option(const struct option *opt, const char *str,
> ret = parse_events(evlist, str, &err);
>
> if (ret) {
> - parse_events_print_error(&err, str);
> + parse_events_error__print(&err, str);
> fprintf(stderr, "Run 'perf list' for a list of valid events\n");
> }
>
> @@ -3324,7 +3324,7 @@ void parse_events_evlist_error(struct parse_events_state *parse_state,
> if (!parse_state->error)
> return;
>
> - parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
> + parse_events_error__handle(parse_state->error, idx, strdup(str), NULL);
> }
>
> static void config_terms_list(char *buf, size_t buf_sz)
> diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
> index f60a661a2247..52ac26b3720a 100644
> --- a/tools/perf/util/parse-events.h
> +++ b/tools/perf/util/parse-events.h
> @@ -142,8 +142,6 @@ struct parse_events_state {
> char *hybrid_pmu_name;
> };
>
> -void parse_events__handle_error(struct parse_events_error *err, int idx,
> - char *str, char *help);
> void parse_events__shrink_config_terms(void);
> int parse_events__is_hardcoded_term(struct parse_events_term *term);
> int parse_events_term__num(struct parse_events_term **term,
> @@ -244,8 +242,10 @@ int is_valid_tracepoint(const char *event_string);
> int valid_event_mount(const char *eventfs);
> char *parse_events_formats_error_string(char *additional_terms);
>
> -void parse_events_print_error(struct parse_events_error *err,
> - const char *event);
> +void parse_events_error__handle(struct parse_events_error *err, int idx,
> + char *str, char *help);
> +void parse_events_error__print(struct parse_events_error *err,
> + const char *event);
>
> #ifdef HAVE_LIBELF_SUPPORT
> /*
> diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
> index 2d60f3cbe42b..174158982fae 100644
> --- a/tools/perf/util/parse-events.y
> +++ b/tools/perf/util/parse-events.y
> @@ -186,7 +186,7 @@ group_def ':' PE_MODIFIER_EVENT
> struct parse_events_state *parse_state = _parse_state;
> struct parse_events_error *error = parse_state->error;
>
> - parse_events__handle_error(error, @3.first_column,
> + parse_events_error__handle(error, @3.first_column,
> strdup("Bad modifier"), NULL);
> free_list_evsel(list);
> YYABORT;
> @@ -248,7 +248,7 @@ event_name PE_MODIFIER_EVENT
> struct parse_events_state *parse_state = _parse_state;
> struct parse_events_error *error = parse_state->error;
>
> - parse_events__handle_error(error, @2.first_column,
> + parse_events_error__handle(error, @2.first_column,
> strdup("Bad modifier"), NULL);
> free_list_evsel(list);
> YYABORT;
> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> index f3072c71d132..6ae58406f4fc 100644
> --- a/tools/perf/util/pmu.c
> +++ b/tools/perf/util/pmu.c
> @@ -1283,7 +1283,7 @@ static int pmu_config_term(const char *pmu_name,
> unknown_term = NULL;
> help_msg = parse_events_formats_error_string(pmu_term);
> if (err) {
> - parse_events__handle_error(err, term->err_term,
> + parse_events_error__handle(err, term->err_term,
> unknown_term,
> help_msg);
> } else {
> @@ -1316,7 +1316,7 @@ static int pmu_config_term(const char *pmu_name,
> if (term->no_value &&
> bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) {
> if (err) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> strdup("no value assigned for term"),
> NULL);
> }
> @@ -1331,7 +1331,7 @@ static int pmu_config_term(const char *pmu_name,
> term->config, term->val.str);
> }
> if (err) {
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> strdup("expected numeric value"),
> NULL);
> }
> @@ -1348,7 +1348,7 @@ static int pmu_config_term(const char *pmu_name,
> if (err) {
> char *err_str;
>
> - parse_events__handle_error(err, term->err_val,
> + parse_events_error__handle(err, term->err_val,
> asprintf(&err_str,
> "value too big for format, maximum is %llu",
> (unsigned long long)max_val) < 0
> --
> 2.34.0.rc0.344.g81b53c2807-goog
--
- Arnaldo
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