b169374748
Json output didn't set the skip_duplicate_pmus callback yielding a
segfault.
Fixes: cd4e1efbbc ("perf pmus: Skip duplicate PMUs and don't print list suffix by default")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20231129213428.2227448-2-irogers@google.com
[namhyung: updated subject line according to Arnaldo]
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
623 lines
17 KiB
C
623 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* builtin-list.c
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*
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* Builtin list command: list all event types
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*
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* Copyright (C) 2009, Thomas Gleixner <tglx@linutronix.de>
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* Copyright (C) 2008-2009, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include "builtin.h"
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#include "util/print-events.h"
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#include "util/pmus.h"
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#include "util/pmu.h"
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#include "util/debug.h"
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#include "util/metricgroup.h"
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#include "util/pfm.h"
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#include "util/string2.h"
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#include "util/strlist.h"
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#include "util/strbuf.h"
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#include <subcmd/pager.h>
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#include <subcmd/parse-options.h>
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#include <linux/zalloc.h>
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#include <stdarg.h>
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#include <stdio.h>
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/**
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* struct print_state - State and configuration passed to the default_print
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* functions.
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*/
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struct print_state {
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/**
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* @pmu_glob: Optionally restrict PMU and metric matching to PMU or
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* debugfs subsystem name.
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*/
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char *pmu_glob;
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/** @event_glob: Optional pattern matching glob. */
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char *event_glob;
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/** @name_only: Print event or metric names only. */
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bool name_only;
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/** @desc: Print the event or metric description. */
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bool desc;
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/** @long_desc: Print longer event or metric description. */
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bool long_desc;
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/** @deprecated: Print deprecated events or metrics. */
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bool deprecated;
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/**
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* @detailed: Print extra information on the perf event such as names
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* and expressions used internally by events.
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*/
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bool detailed;
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/** @metrics: Controls printing of metric and metric groups. */
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bool metrics;
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/** @metricgroups: Controls printing of metric and metric groups. */
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bool metricgroups;
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/** @last_topic: The last printed event topic. */
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char *last_topic;
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/** @last_metricgroups: The last printed metric group. */
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char *last_metricgroups;
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/** @visited_metrics: Metrics that are printed to avoid duplicates. */
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struct strlist *visited_metrics;
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};
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static void default_print_start(void *ps)
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{
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struct print_state *print_state = ps;
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if (!print_state->name_only && pager_in_use())
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printf("\nList of pre-defined events (to be used in -e or -M):\n\n");
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}
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static void default_print_end(void *print_state __maybe_unused) {}
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static void wordwrap(const char *s, int start, int max, int corr)
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{
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int column = start;
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int n;
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bool saw_newline = false;
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while (*s) {
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int wlen = strcspn(s, " \t\n");
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if ((column + wlen >= max && column > start) || saw_newline) {
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printf("\n%*s", start, "");
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column = start + corr;
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}
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n = printf("%s%.*s", column > start ? " " : "", wlen, s);
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if (n <= 0)
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break;
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saw_newline = s[wlen] == '\n';
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s += wlen;
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column += n;
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s = skip_spaces(s);
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}
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}
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static void default_print_event(void *ps, const char *pmu_name, const char *topic,
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const char *event_name, const char *event_alias,
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const char *scale_unit __maybe_unused,
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bool deprecated, const char *event_type_desc,
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const char *desc, const char *long_desc,
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const char *encoding_desc)
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{
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struct print_state *print_state = ps;
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int pos;
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if (deprecated && !print_state->deprecated)
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return;
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if (print_state->pmu_glob && pmu_name && !strglobmatch(pmu_name, print_state->pmu_glob))
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return;
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if (print_state->event_glob &&
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(!event_name || !strglobmatch(event_name, print_state->event_glob)) &&
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(!event_alias || !strglobmatch(event_alias, print_state->event_glob)) &&
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(!topic || !strglobmatch_nocase(topic, print_state->event_glob)))
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return;
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if (print_state->name_only) {
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if (event_alias && strlen(event_alias))
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printf("%s ", event_alias);
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else
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printf("%s ", event_name);
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return;
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}
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if (strcmp(print_state->last_topic, topic ?: "")) {
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if (topic)
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printf("\n%s:\n", topic);
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zfree(&print_state->last_topic);
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print_state->last_topic = strdup(topic ?: "");
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}
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if (event_alias && strlen(event_alias))
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pos = printf(" %s OR %s", event_name, event_alias);
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else
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pos = printf(" %s", event_name);
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if (!topic && event_type_desc) {
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for (; pos < 53; pos++)
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putchar(' ');
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printf("[%s]\n", event_type_desc);
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} else
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putchar('\n');
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if (desc && print_state->desc) {
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char *desc_with_unit = NULL;
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int desc_len = -1;
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if (pmu_name && strcmp(pmu_name, "default_core")) {
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desc_len = strlen(desc);
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desc_len = asprintf(&desc_with_unit,
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desc[desc_len - 1] != '.'
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? "%s. Unit: %s" : "%s Unit: %s",
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desc, pmu_name);
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}
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printf("%*s", 8, "[");
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wordwrap(desc_len > 0 ? desc_with_unit : desc, 8, pager_get_columns(), 0);
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printf("]\n");
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free(desc_with_unit);
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}
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long_desc = long_desc ?: desc;
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if (long_desc && print_state->long_desc) {
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printf("%*s", 8, "[");
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wordwrap(long_desc, 8, pager_get_columns(), 0);
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printf("]\n");
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}
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if (print_state->detailed && encoding_desc) {
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printf("%*s", 8, "");
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wordwrap(encoding_desc, 8, pager_get_columns(), 0);
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putchar('\n');
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}
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}
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static void default_print_metric(void *ps,
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const char *group,
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const char *name,
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const char *desc,
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const char *long_desc,
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const char *expr,
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const char *threshold,
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const char *unit __maybe_unused)
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{
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struct print_state *print_state = ps;
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if (print_state->event_glob &&
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(!print_state->metrics || !name || !strglobmatch(name, print_state->event_glob)) &&
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(!print_state->metricgroups || !group || !strglobmatch(group, print_state->event_glob)))
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return;
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if (!print_state->name_only && !print_state->last_metricgroups) {
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if (print_state->metricgroups) {
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printf("\nMetric Groups:\n");
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if (!print_state->metrics)
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putchar('\n');
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} else {
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printf("\nMetrics:\n\n");
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}
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}
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if (!print_state->last_metricgroups ||
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strcmp(print_state->last_metricgroups, group ?: "")) {
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if (group && print_state->metricgroups) {
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if (print_state->name_only)
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printf("%s ", group);
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else if (print_state->metrics) {
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const char *gdesc = describe_metricgroup(group);
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if (gdesc)
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printf("\n%s: [%s]\n", group, gdesc);
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else
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printf("\n%s:\n", group);
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} else
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printf("%s\n", group);
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}
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zfree(&print_state->last_metricgroups);
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print_state->last_metricgroups = strdup(group ?: "");
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}
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if (!print_state->metrics)
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return;
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if (print_state->name_only) {
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if (print_state->metrics &&
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!strlist__has_entry(print_state->visited_metrics, name)) {
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printf("%s ", name);
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strlist__add(print_state->visited_metrics, name);
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}
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return;
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}
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printf(" %s\n", name);
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if (desc && print_state->desc) {
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printf("%*s", 8, "[");
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wordwrap(desc, 8, pager_get_columns(), 0);
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printf("]\n");
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}
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if (long_desc && print_state->long_desc) {
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printf("%*s", 8, "[");
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wordwrap(long_desc, 8, pager_get_columns(), 0);
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printf("]\n");
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}
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if (expr && print_state->detailed) {
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printf("%*s", 8, "[");
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wordwrap(expr, 8, pager_get_columns(), 0);
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printf("]\n");
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}
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if (threshold && print_state->detailed) {
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printf("%*s", 8, "[");
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wordwrap(threshold, 8, pager_get_columns(), 0);
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printf("]\n");
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}
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}
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struct json_print_state {
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/** Should a separator be printed prior to the next item? */
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bool need_sep;
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};
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static void json_print_start(void *print_state __maybe_unused)
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{
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printf("[\n");
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}
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static void json_print_end(void *ps)
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{
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struct json_print_state *print_state = ps;
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printf("%s]\n", print_state->need_sep ? "\n" : "");
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}
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static void fix_escape_printf(struct strbuf *buf, const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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strbuf_setlen(buf, 0);
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for (size_t fmt_pos = 0; fmt_pos < strlen(fmt); fmt_pos++) {
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switch (fmt[fmt_pos]) {
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case '%':
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fmt_pos++;
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switch (fmt[fmt_pos]) {
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case 's': {
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const char *s = va_arg(args, const char*);
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strbuf_addstr(buf, s);
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break;
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}
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case 'S': {
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const char *s = va_arg(args, const char*);
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for (size_t s_pos = 0; s_pos < strlen(s); s_pos++) {
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switch (s[s_pos]) {
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case '\n':
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strbuf_addstr(buf, "\\n");
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break;
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case '\\':
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fallthrough;
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case '\"':
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strbuf_addch(buf, '\\');
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fallthrough;
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default:
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strbuf_addch(buf, s[s_pos]);
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break;
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}
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}
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break;
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}
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default:
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pr_err("Unexpected format character '%c'\n", fmt[fmt_pos]);
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strbuf_addch(buf, '%');
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strbuf_addch(buf, fmt[fmt_pos]);
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}
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break;
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default:
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strbuf_addch(buf, fmt[fmt_pos]);
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break;
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}
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}
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va_end(args);
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fputs(buf->buf, stdout);
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}
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static void json_print_event(void *ps, const char *pmu_name, const char *topic,
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const char *event_name, const char *event_alias,
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const char *scale_unit,
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bool deprecated, const char *event_type_desc,
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const char *desc, const char *long_desc,
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const char *encoding_desc)
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{
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struct json_print_state *print_state = ps;
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bool need_sep = false;
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struct strbuf buf;
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strbuf_init(&buf, 0);
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printf("%s{\n", print_state->need_sep ? ",\n" : "");
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print_state->need_sep = true;
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if (pmu_name) {
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fix_escape_printf(&buf, "\t\"Unit\": \"%S\"", pmu_name);
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need_sep = true;
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}
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if (topic) {
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fix_escape_printf(&buf, "%s\t\"Topic\": \"%S\"", need_sep ? ",\n" : "", topic);
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need_sep = true;
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}
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if (event_name) {
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fix_escape_printf(&buf, "%s\t\"EventName\": \"%S\"", need_sep ? ",\n" : "",
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event_name);
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need_sep = true;
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}
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if (event_alias && strlen(event_alias)) {
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fix_escape_printf(&buf, "%s\t\"EventAlias\": \"%S\"", need_sep ? ",\n" : "",
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event_alias);
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need_sep = true;
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}
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if (scale_unit && strlen(scale_unit)) {
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fix_escape_printf(&buf, "%s\t\"ScaleUnit\": \"%S\"", need_sep ? ",\n" : "",
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scale_unit);
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need_sep = true;
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}
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if (event_type_desc) {
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fix_escape_printf(&buf, "%s\t\"EventType\": \"%S\"", need_sep ? ",\n" : "",
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event_type_desc);
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need_sep = true;
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}
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if (deprecated) {
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fix_escape_printf(&buf, "%s\t\"Deprecated\": \"%S\"", need_sep ? ",\n" : "",
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deprecated ? "1" : "0");
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need_sep = true;
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}
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if (desc) {
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fix_escape_printf(&buf, "%s\t\"BriefDescription\": \"%S\"", need_sep ? ",\n" : "",
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desc);
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need_sep = true;
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}
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if (long_desc) {
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fix_escape_printf(&buf, "%s\t\"PublicDescription\": \"%S\"", need_sep ? ",\n" : "",
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long_desc);
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need_sep = true;
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}
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if (encoding_desc) {
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fix_escape_printf(&buf, "%s\t\"Encoding\": \"%S\"", need_sep ? ",\n" : "",
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encoding_desc);
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need_sep = true;
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}
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printf("%s}", need_sep ? "\n" : "");
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strbuf_release(&buf);
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}
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static void json_print_metric(void *ps __maybe_unused, const char *group,
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const char *name, const char *desc,
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const char *long_desc, const char *expr,
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const char *threshold, const char *unit)
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{
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struct json_print_state *print_state = ps;
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bool need_sep = false;
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struct strbuf buf;
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strbuf_init(&buf, 0);
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printf("%s{\n", print_state->need_sep ? ",\n" : "");
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print_state->need_sep = true;
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if (group) {
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fix_escape_printf(&buf, "\t\"MetricGroup\": \"%S\"", group);
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need_sep = true;
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}
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if (name) {
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fix_escape_printf(&buf, "%s\t\"MetricName\": \"%S\"", need_sep ? ",\n" : "", name);
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need_sep = true;
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}
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if (expr) {
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fix_escape_printf(&buf, "%s\t\"MetricExpr\": \"%S\"", need_sep ? ",\n" : "", expr);
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need_sep = true;
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}
|
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if (threshold) {
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fix_escape_printf(&buf, "%s\t\"MetricThreshold\": \"%S\"", need_sep ? ",\n" : "",
|
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threshold);
|
|
need_sep = true;
|
|
}
|
|
if (unit) {
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|
fix_escape_printf(&buf, "%s\t\"ScaleUnit\": \"%S\"", need_sep ? ",\n" : "", unit);
|
|
need_sep = true;
|
|
}
|
|
if (desc) {
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|
fix_escape_printf(&buf, "%s\t\"BriefDescription\": \"%S\"", need_sep ? ",\n" : "",
|
|
desc);
|
|
need_sep = true;
|
|
}
|
|
if (long_desc) {
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|
fix_escape_printf(&buf, "%s\t\"PublicDescription\": \"%S\"", need_sep ? ",\n" : "",
|
|
long_desc);
|
|
need_sep = true;
|
|
}
|
|
printf("%s}", need_sep ? "\n" : "");
|
|
strbuf_release(&buf);
|
|
}
|
|
|
|
static bool json_skip_duplicate_pmus(void *ps __maybe_unused)
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|
{
|
|
return false;
|
|
}
|
|
|
|
static bool default_skip_duplicate_pmus(void *ps)
|
|
{
|
|
struct print_state *print_state = ps;
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|
|
|
return !print_state->long_desc;
|
|
}
|
|
|
|
int cmd_list(int argc, const char **argv)
|
|
{
|
|
int i, ret = 0;
|
|
struct print_state default_ps = {};
|
|
struct print_state json_ps = {};
|
|
void *ps = &default_ps;
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|
struct print_callbacks print_cb = {
|
|
.print_start = default_print_start,
|
|
.print_end = default_print_end,
|
|
.print_event = default_print_event,
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|
.print_metric = default_print_metric,
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|
.skip_duplicate_pmus = default_skip_duplicate_pmus,
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|
};
|
|
const char *cputype = NULL;
|
|
const char *unit_name = NULL;
|
|
bool json = false;
|
|
struct option list_options[] = {
|
|
OPT_BOOLEAN(0, "raw-dump", &default_ps.name_only, "Dump raw events"),
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|
OPT_BOOLEAN('j', "json", &json, "JSON encode events and metrics"),
|
|
OPT_BOOLEAN('d', "desc", &default_ps.desc,
|
|
"Print extra event descriptions. --no-desc to not print."),
|
|
OPT_BOOLEAN('v', "long-desc", &default_ps.long_desc,
|
|
"Print longer event descriptions."),
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|
OPT_BOOLEAN(0, "details", &default_ps.detailed,
|
|
"Print information on the perf event names and expressions used internally by events."),
|
|
OPT_BOOLEAN(0, "deprecated", &default_ps.deprecated,
|
|
"Print deprecated events."),
|
|
OPT_STRING(0, "cputype", &cputype, "cpu type",
|
|
"Limit PMU or metric printing to the given PMU (e.g. cpu, core or atom)."),
|
|
OPT_STRING(0, "unit", &unit_name, "PMU name",
|
|
"Limit PMU or metric printing to the specified PMU."),
|
|
OPT_INCR(0, "debug", &verbose,
|
|
"Enable debugging output"),
|
|
OPT_END()
|
|
};
|
|
const char * const list_usage[] = {
|
|
#ifdef HAVE_LIBPFM
|
|
"perf list [<options>] [hw|sw|cache|tracepoint|pmu|sdt|metric|metricgroup|event_glob|pfm]",
|
|
#else
|
|
"perf list [<options>] [hw|sw|cache|tracepoint|pmu|sdt|metric|metricgroup|event_glob]",
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
set_option_flag(list_options, 0, "raw-dump", PARSE_OPT_HIDDEN);
|
|
/* Hide hybrid flag for the more generic 'unit' flag. */
|
|
set_option_flag(list_options, 0, "cputype", PARSE_OPT_HIDDEN);
|
|
|
|
argc = parse_options(argc, argv, list_options, list_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
setup_pager();
|
|
|
|
if (!default_ps.name_only)
|
|
setup_pager();
|
|
|
|
if (json) {
|
|
print_cb = (struct print_callbacks){
|
|
.print_start = json_print_start,
|
|
.print_end = json_print_end,
|
|
.print_event = json_print_event,
|
|
.print_metric = json_print_metric,
|
|
.skip_duplicate_pmus = json_skip_duplicate_pmus,
|
|
};
|
|
ps = &json_ps;
|
|
} else {
|
|
default_ps.desc = !default_ps.long_desc;
|
|
default_ps.last_topic = strdup("");
|
|
assert(default_ps.last_topic);
|
|
default_ps.visited_metrics = strlist__new(NULL, NULL);
|
|
assert(default_ps.visited_metrics);
|
|
if (unit_name)
|
|
default_ps.pmu_glob = strdup(unit_name);
|
|
else if (cputype) {
|
|
const struct perf_pmu *pmu = perf_pmus__pmu_for_pmu_filter(cputype);
|
|
|
|
if (!pmu) {
|
|
pr_err("ERROR: cputype is not supported!\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
default_ps.pmu_glob = strdup(pmu->name);
|
|
}
|
|
}
|
|
print_cb.print_start(ps);
|
|
|
|
if (argc == 0) {
|
|
default_ps.metrics = true;
|
|
default_ps.metricgroups = true;
|
|
print_events(&print_cb, ps);
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < argc; ++i) {
|
|
char *sep, *s;
|
|
|
|
if (strcmp(argv[i], "tracepoint") == 0)
|
|
print_tracepoint_events(&print_cb, ps);
|
|
else if (strcmp(argv[i], "hw") == 0 ||
|
|
strcmp(argv[i], "hardware") == 0)
|
|
print_symbol_events(&print_cb, ps, PERF_TYPE_HARDWARE,
|
|
event_symbols_hw, PERF_COUNT_HW_MAX);
|
|
else if (strcmp(argv[i], "sw") == 0 ||
|
|
strcmp(argv[i], "software") == 0) {
|
|
print_symbol_events(&print_cb, ps, PERF_TYPE_SOFTWARE,
|
|
event_symbols_sw, PERF_COUNT_SW_MAX);
|
|
print_tool_events(&print_cb, ps);
|
|
} else if (strcmp(argv[i], "cache") == 0 ||
|
|
strcmp(argv[i], "hwcache") == 0)
|
|
print_hwcache_events(&print_cb, ps);
|
|
else if (strcmp(argv[i], "pmu") == 0)
|
|
perf_pmus__print_pmu_events(&print_cb, ps);
|
|
else if (strcmp(argv[i], "sdt") == 0)
|
|
print_sdt_events(&print_cb, ps);
|
|
else if (strcmp(argv[i], "metric") == 0 || strcmp(argv[i], "metrics") == 0) {
|
|
default_ps.metricgroups = false;
|
|
default_ps.metrics = true;
|
|
metricgroup__print(&print_cb, ps);
|
|
} else if (strcmp(argv[i], "metricgroup") == 0 ||
|
|
strcmp(argv[i], "metricgroups") == 0) {
|
|
default_ps.metricgroups = true;
|
|
default_ps.metrics = false;
|
|
metricgroup__print(&print_cb, ps);
|
|
}
|
|
#ifdef HAVE_LIBPFM
|
|
else if (strcmp(argv[i], "pfm") == 0)
|
|
print_libpfm_events(&print_cb, ps);
|
|
#endif
|
|
else if ((sep = strchr(argv[i], ':')) != NULL) {
|
|
char *old_pmu_glob = default_ps.pmu_glob;
|
|
|
|
default_ps.event_glob = strdup(argv[i]);
|
|
if (!default_ps.event_glob) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
print_tracepoint_events(&print_cb, ps);
|
|
print_sdt_events(&print_cb, ps);
|
|
default_ps.metrics = true;
|
|
default_ps.metricgroups = true;
|
|
metricgroup__print(&print_cb, ps);
|
|
zfree(&default_ps.event_glob);
|
|
default_ps.pmu_glob = old_pmu_glob;
|
|
} else {
|
|
if (asprintf(&s, "*%s*", argv[i]) < 0) {
|
|
printf("Critical: Not enough memory! Trying to continue...\n");
|
|
continue;
|
|
}
|
|
default_ps.event_glob = s;
|
|
print_symbol_events(&print_cb, ps, PERF_TYPE_HARDWARE,
|
|
event_symbols_hw, PERF_COUNT_HW_MAX);
|
|
print_symbol_events(&print_cb, ps, PERF_TYPE_SOFTWARE,
|
|
event_symbols_sw, PERF_COUNT_SW_MAX);
|
|
print_tool_events(&print_cb, ps);
|
|
print_hwcache_events(&print_cb, ps);
|
|
perf_pmus__print_pmu_events(&print_cb, ps);
|
|
print_tracepoint_events(&print_cb, ps);
|
|
print_sdt_events(&print_cb, ps);
|
|
default_ps.metrics = true;
|
|
default_ps.metricgroups = true;
|
|
metricgroup__print(&print_cb, ps);
|
|
free(s);
|
|
}
|
|
}
|
|
|
|
out:
|
|
print_cb.print_end(ps);
|
|
free(default_ps.pmu_glob);
|
|
free(default_ps.last_topic);
|
|
free(default_ps.last_metricgroups);
|
|
strlist__delete(default_ps.visited_metrics);
|
|
return ret;
|
|
}
|