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Date: Wed, 3 Feb 2021 11:02:50 -0800
From: Ian Rogers <irogers@...gle.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
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>,
LKML <linux-kernel@...r.kernel.org>,
Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 2/2] perf parse-events: Break out tracepoint and printing.
On Wed, Feb 3, 2021 at 8:21 AM Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
>
> Em Tue, Feb 02, 2021 at 09:26:59PM -0800, Ian Rogers escreveu:
> > Move print_*_events functions out of parse-events.c into a new
> > print-events.c. Move tracepoint code into tracepoint.c or
> > trace-event-info.c (sole user). This reduces the dependencies of
> > parse-events.c and makes it more amenable to being a library in the
> > future.
> > Remove some unnecessary definitions from parse-events.h. Fix a
> > checkpatch.pl warning on using unsigned rather than unsigned int.
>
> Thanks, applied.
(Re-send enabling plain text mode)
Wow, cool :-) I wasn't sure about the macros in the headers. Are you
staging these patches before pushing to your perf/core or using
tmp.perf/core ? I know you mentioned a different approach. When I look
at:
https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/
I don't see anything newer than 9 days.
Thanks,
Ian
>
> - Arnaldo
>
>
> > Signed-off-by: Ian Rogers <irogers@...gle.com>
> > ---
> > tools/perf/builtin-list.c | 2 +-
> > tools/perf/builtin-lock.c | 1 +
> > tools/perf/builtin-timechart.c | 1 +
> > tools/perf/builtin-trace.c | 1 +
> > tools/perf/util/Build | 2 +
> > tools/perf/util/parse-events.c | 620 +----------------------------
> > tools/perf/util/parse-events.h | 29 --
> > tools/perf/util/print-events.c | 472 ++++++++++++++++++++++
> > tools/perf/util/print-events.h | 21 +
> > tools/perf/util/trace-event-info.c | 94 +++++
> > tools/perf/util/tracepoint.c | 63 +++
> > tools/perf/util/tracepoint.h | 25 ++
> > 12 files changed, 687 insertions(+), 644 deletions(-)
> > create mode 100644 tools/perf/util/print-events.c
> > create mode 100644 tools/perf/util/print-events.h
> > create mode 100644 tools/perf/util/tracepoint.c
> > create mode 100644 tools/perf/util/tracepoint.h
> >
> > diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
> > index 10ab5e40a34f..91327a321c36 100644
> > --- a/tools/perf/builtin-list.c
> > +++ b/tools/perf/builtin-list.c
> > @@ -10,7 +10,7 @@
> > */
> > #include "builtin.h"
> >
> > -#include "util/parse-events.h"
> > +#include "util/print-events.h"
> > #include "util/pmu.h"
> > #include "util/debug.h"
> > #include "util/metricgroup.h"
> > diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
> > index a2f1e53f37a7..486123cb106e 100644
> > --- a/tools/perf/builtin-lock.c
> > +++ b/tools/perf/builtin-lock.c
> > @@ -13,6 +13,7 @@
> > #include <subcmd/pager.h>
> > #include <subcmd/parse-options.h>
> > #include "util/trace-event.h"
> > +#include "util/tracepoint.h"
> >
> > #include "util/debug.h"
> > #include "util/session.h"
> > diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
> > index 4e380e7b5230..cdebcf26f408 100644
> > --- a/tools/perf/builtin-timechart.c
> > +++ b/tools/perf/builtin-timechart.c
> > @@ -35,6 +35,7 @@
> > #include "util/tool.h"
> > #include "util/data.h"
> > #include "util/debug.h"
> > +#include "util/tracepoint.h"
> > #include <linux/err.h>
> >
> > #ifdef LACKS_OPEN_MEMSTREAM_PROTOTYPE
> > diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> > index 85b6a46e85b6..b3b9fa1c7731 100644
> > --- a/tools/perf/builtin-trace.c
> > +++ b/tools/perf/builtin-trace.c
> > @@ -53,6 +53,7 @@
> > #include "trace-event.h"
> > #include "util/parse-events.h"
> > #include "util/bpf-loader.h"
> > +#include "util/tracepoint.h"
> > #include "callchain.h"
> > #include "print_binary.h"
> > #include "string2.h"
> > diff --git a/tools/perf/util/Build b/tools/perf/util/Build
> > index 188521f34347..c2c9f3f490e8 100644
> > --- a/tools/perf/util/Build
> > +++ b/tools/perf/util/Build
> > @@ -23,6 +23,8 @@ perf-y += llvm-utils.o
> > perf-y += mmap.o
> > perf-y += memswap.o
> > perf-y += parse-events.o
> > +perf-y += print-events.o
> > +perf-y += tracepoint.o
> > perf-y += perf_regs.o
> > perf-y += path.o
> > perf-y += print_binary.o
> > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> > index 42c84adeb2fb..5d5ebb700ef2 100644
> > --- a/tools/perf/util/parse-events.c
> > +++ b/tools/perf/util/parse-events.c
> > @@ -5,42 +5,34 @@
> > #include <dirent.h>
> > #include <errno.h>
> > #include <sys/ioctl.h>
> > -#include <sys/types.h>
> > -#include <sys/stat.h>
> > -#include <fcntl.h>
> > #include <sys/param.h>
> > #include "term.h"
> > -#include "build-id.h"
> > #include "evlist.h"
> > #include "evsel.h"
> > -#include <subcmd/pager.h>
> > #include <subcmd/parse-options.h>
> > #include "parse-events.h"
> > -#include <subcmd/exec-cmd.h>
> > #include "string2.h"
> > -#include "strlist.h"
> > -#include "symbol.h"
> > -#include "header.h"
> > #include "bpf-loader.h"
> > #include "debug.h"
> > #include <api/fs/tracing_path.h>
> > #include <perf/cpumap.h>
> > #include "parse-events-bison.h"
> > -#define YY_EXTRA_TYPE void*
> > #include "parse-events-flex.h"
> > #include "pmu.h"
> > -#include "thread_map.h"
> > -#include "probe-file.h"
> > #include "asm/bug.h"
> > #include "util/parse-branch-options.h"
> > -#include "metricgroup.h"
> > #include "util/evsel_config.h"
> > #include "util/event.h"
> > -#include "util/pfm.h"
> > #include "perf.h"
> > +#include "tracepoint.h"
> >
> > #define MAX_NAME_LEN 100
> >
> > +struct perf_pmu_event_symbol {
> > + char *symbol;
> > + enum perf_pmu_event_symbol_type type;
> > +};
> > +
> > #ifdef PARSER_DEBUG
> > extern int parse_events_debug;
> > #endif
> > @@ -155,35 +147,6 @@ struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
> > #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
> > #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
> >
> > -#define for_each_subsystem(sys_dir, sys_dirent) \
> > - while ((sys_dirent = readdir(sys_dir)) != NULL) \
> > - if (sys_dirent->d_type == DT_DIR && \
> > - (strcmp(sys_dirent->d_name, ".")) && \
> > - (strcmp(sys_dirent->d_name, "..")))
> > -
> > -static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
> > -{
> > - char evt_path[MAXPATHLEN];
> > - int fd;
> > -
> > - snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
> > - fd = open(evt_path, O_RDONLY);
> > - if (fd < 0)
> > - return -EINVAL;
> > - close(fd);
> > -
> > - return 0;
> > -}
> > -
> > -#define for_each_event(dir_path, evt_dir, evt_dirent) \
> > - while ((evt_dirent = readdir(evt_dir)) != NULL) \
> > - if (evt_dirent->d_type == DT_DIR && \
> > - (strcmp(evt_dirent->d_name, ".")) && \
> > - (strcmp(evt_dirent->d_name, "..")) && \
> > - (!tp_event_has_id(dir_path, evt_dirent)))
> > -
> > -#define MAX_EVENT_LENGTH 512
> > -
> > void parse_events__handle_error(struct parse_events_error *err, int idx,
> > char *str, char *help)
> > {
> > @@ -217,92 +180,6 @@ void parse_events__handle_error(struct parse_events_error *err, int idx,
> > err->num_errors++;
> > }
> >
> > -struct tracepoint_path *tracepoint_id_to_path(u64 config)
> > -{
> > - struct tracepoint_path *path = NULL;
> > - DIR *sys_dir, *evt_dir;
> > - struct dirent *sys_dirent, *evt_dirent;
> > - char id_buf[24];
> > - int fd;
> > - u64 id;
> > - char evt_path[MAXPATHLEN];
> > - char *dir_path;
> > -
> > - sys_dir = tracing_events__opendir();
> > - if (!sys_dir)
> > - return NULL;
> > -
> > - for_each_subsystem(sys_dir, sys_dirent) {
> > - dir_path = get_events_file(sys_dirent->d_name);
> > - if (!dir_path)
> > - continue;
> > - evt_dir = opendir(dir_path);
> > - if (!evt_dir)
> > - goto next;
> > -
> > - for_each_event(dir_path, evt_dir, evt_dirent) {
> > -
> > - scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
> > - evt_dirent->d_name);
> > - fd = open(evt_path, O_RDONLY);
> > - if (fd < 0)
> > - continue;
> > - if (read(fd, id_buf, sizeof(id_buf)) < 0) {
> > - close(fd);
> > - continue;
> > - }
> > - close(fd);
> > - id = atoll(id_buf);
> > - if (id == config) {
> > - put_events_file(dir_path);
> > - closedir(evt_dir);
> > - closedir(sys_dir);
> > - path = zalloc(sizeof(*path));
> > - if (!path)
> > - return NULL;
> > - if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
> > - free(path);
> > - return NULL;
> > - }
> > - if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
> > - zfree(&path->system);
> > - free(path);
> > - return NULL;
> > - }
> > - return path;
> > - }
> > - }
> > - closedir(evt_dir);
> > -next:
> > - put_events_file(dir_path);
> > - }
> > -
> > - closedir(sys_dir);
> > - return NULL;
> > -}
> > -
> > -struct tracepoint_path *tracepoint_name_to_path(const char *name)
> > -{
> > - struct tracepoint_path *path = zalloc(sizeof(*path));
> > - char *str = strchr(name, ':');
> > -
> > - if (path == NULL || str == NULL) {
> > - free(path);
> > - return NULL;
> > - }
> > -
> > - path->system = strndup(name, str - name);
> > - path->name = strdup(str+1);
> > -
> > - if (path->system == NULL || path->name == NULL) {
> > - zfree(&path->system);
> > - zfree(&path->name);
> > - zfree(&path);
> > - }
> > -
> > - return path;
> > -}
> > -
> > const char *event_type(int type)
> > {
> > switch (type) {
> > @@ -2451,491 +2328,6 @@ int exclude_perf(const struct option *opt,
> > NULL);
> > }
> >
> > -static const char * const event_type_descriptors[] = {
> > - "Hardware event",
> > - "Software event",
> > - "Tracepoint event",
> > - "Hardware cache event",
> > - "Raw hardware event descriptor",
> > - "Hardware breakpoint",
> > -};
> > -
> > -static int cmp_string(const void *a, const void *b)
> > -{
> > - const char * const *as = a;
> > - const char * const *bs = b;
> > -
> > - return strcmp(*as, *bs);
> > -}
> > -
> > -/*
> > - * Print the events from <debugfs_mount_point>/tracing/events
> > - */
> > -
> > -void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
> > - bool name_only)
> > -{
> > - DIR *sys_dir, *evt_dir;
> > - struct dirent *sys_dirent, *evt_dirent;
> > - char evt_path[MAXPATHLEN];
> > - char *dir_path;
> > - char **evt_list = NULL;
> > - unsigned int evt_i = 0, evt_num = 0;
> > - bool evt_num_known = false;
> > -
> > -restart:
> > - sys_dir = tracing_events__opendir();
> > - if (!sys_dir)
> > - return;
> > -
> > - if (evt_num_known) {
> > - evt_list = zalloc(sizeof(char *) * evt_num);
> > - if (!evt_list)
> > - goto out_close_sys_dir;
> > - }
> > -
> > - for_each_subsystem(sys_dir, sys_dirent) {
> > - if (subsys_glob != NULL &&
> > - !strglobmatch(sys_dirent->d_name, subsys_glob))
> > - continue;
> > -
> > - dir_path = get_events_file(sys_dirent->d_name);
> > - if (!dir_path)
> > - continue;
> > - evt_dir = opendir(dir_path);
> > - if (!evt_dir)
> > - goto next;
> > -
> > - for_each_event(dir_path, evt_dir, evt_dirent) {
> > - if (event_glob != NULL &&
> > - !strglobmatch(evt_dirent->d_name, event_glob))
> > - continue;
> > -
> > - if (!evt_num_known) {
> > - evt_num++;
> > - continue;
> > - }
> > -
> > - snprintf(evt_path, MAXPATHLEN, "%s:%s",
> > - sys_dirent->d_name, evt_dirent->d_name);
> > -
> > - evt_list[evt_i] = strdup(evt_path);
> > - if (evt_list[evt_i] == NULL) {
> > - put_events_file(dir_path);
> > - goto out_close_evt_dir;
> > - }
> > - evt_i++;
> > - }
> > - closedir(evt_dir);
> > -next:
> > - put_events_file(dir_path);
> > - }
> > - closedir(sys_dir);
> > -
> > - if (!evt_num_known) {
> > - evt_num_known = true;
> > - goto restart;
> > - }
> > - qsort(evt_list, evt_num, sizeof(char *), cmp_string);
> > - evt_i = 0;
> > - while (evt_i < evt_num) {
> > - if (name_only) {
> > - printf("%s ", evt_list[evt_i++]);
> > - continue;
> > - }
> > - printf(" %-50s [%s]\n", evt_list[evt_i++],
> > - event_type_descriptors[PERF_TYPE_TRACEPOINT]);
> > - }
> > - if (evt_num && pager_in_use())
> > - printf("\n");
> > -
> > -out_free:
> > - evt_num = evt_i;
> > - for (evt_i = 0; evt_i < evt_num; evt_i++)
> > - zfree(&evt_list[evt_i]);
> > - zfree(&evt_list);
> > - return;
> > -
> > -out_close_evt_dir:
> > - closedir(evt_dir);
> > -out_close_sys_dir:
> > - closedir(sys_dir);
> > -
> > - printf("FATAL: not enough memory to print %s\n",
> > - event_type_descriptors[PERF_TYPE_TRACEPOINT]);
> > - if (evt_list)
> > - goto out_free;
> > -}
> > -
> > -/*
> > - * Check whether event is in <debugfs_mount_point>/tracing/events
> > - */
> > -
> > -int is_valid_tracepoint(const char *event_string)
> > -{
> > - DIR *sys_dir, *evt_dir;
> > - struct dirent *sys_dirent, *evt_dirent;
> > - char evt_path[MAXPATHLEN];
> > - char *dir_path;
> > -
> > - sys_dir = tracing_events__opendir();
> > - if (!sys_dir)
> > - return 0;
> > -
> > - for_each_subsystem(sys_dir, sys_dirent) {
> > - dir_path = get_events_file(sys_dirent->d_name);
> > - if (!dir_path)
> > - continue;
> > - evt_dir = opendir(dir_path);
> > - if (!evt_dir)
> > - goto next;
> > -
> > - for_each_event(dir_path, evt_dir, evt_dirent) {
> > - snprintf(evt_path, MAXPATHLEN, "%s:%s",
> > - sys_dirent->d_name, evt_dirent->d_name);
> > - if (!strcmp(evt_path, event_string)) {
> > - closedir(evt_dir);
> > - closedir(sys_dir);
> > - return 1;
> > - }
> > - }
> > - closedir(evt_dir);
> > -next:
> > - put_events_file(dir_path);
> > - }
> > - closedir(sys_dir);
> > - return 0;
> > -}
> > -
> > -static bool is_event_supported(u8 type, unsigned config)
> > -{
> > - bool ret = true;
> > - int open_return;
> > - struct evsel *evsel;
> > - struct perf_event_attr attr = {
> > - .type = type,
> > - .config = config,
> > - .disabled = 1,
> > - };
> > - struct perf_thread_map *tmap = thread_map__new_by_tid(0);
> > -
> > - if (tmap == NULL)
> > - return false;
> > -
> > - evsel = evsel__new(&attr);
> > - if (evsel) {
> > - open_return = evsel__open(evsel, NULL, tmap);
> > - ret = open_return >= 0;
> > -
> > - if (open_return == -EACCES) {
> > - /*
> > - * This happens if the paranoid value
> > - * /proc/sys/kernel/perf_event_paranoid is set to 2
> > - * Re-run with exclude_kernel set; we don't do that
> > - * by default as some ARM machines do not support it.
> > - *
> > - */
> > - evsel->core.attr.exclude_kernel = 1;
> > - ret = evsel__open(evsel, NULL, tmap) >= 0;
> > - }
> > - evsel__delete(evsel);
> > - }
> > -
> > - perf_thread_map__put(tmap);
> > - return ret;
> > -}
> > -
> > -void print_sdt_events(const char *subsys_glob, const char *event_glob,
> > - bool name_only)
> > -{
> > - struct probe_cache *pcache;
> > - struct probe_cache_entry *ent;
> > - struct strlist *bidlist, *sdtlist;
> > - struct strlist_config cfg = {.dont_dupstr = true};
> > - struct str_node *nd, *nd2;
> > - char *buf, *path, *ptr = NULL;
> > - bool show_detail = false;
> > - int ret;
> > -
> > - sdtlist = strlist__new(NULL, &cfg);
> > - if (!sdtlist) {
> > - pr_debug("Failed to allocate new strlist for SDT\n");
> > - return;
> > - }
> > - bidlist = build_id_cache__list_all(true);
> > - if (!bidlist) {
> > - pr_debug("Failed to get buildids: %d\n", errno);
> > - return;
> > - }
> > - strlist__for_each_entry(nd, bidlist) {
> > - pcache = probe_cache__new(nd->s, NULL);
> > - if (!pcache)
> > - continue;
> > - list_for_each_entry(ent, &pcache->entries, node) {
> > - if (!ent->sdt)
> > - continue;
> > - if (subsys_glob &&
> > - !strglobmatch(ent->pev.group, subsys_glob))
> > - continue;
> > - if (event_glob &&
> > - !strglobmatch(ent->pev.event, event_glob))
> > - continue;
> > - ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
> > - ent->pev.event, nd->s);
> > - if (ret > 0)
> > - strlist__add(sdtlist, buf);
> > - }
> > - probe_cache__delete(pcache);
> > - }
> > - strlist__delete(bidlist);
> > -
> > - strlist__for_each_entry(nd, sdtlist) {
> > - buf = strchr(nd->s, '@');
> > - if (buf)
> > - *(buf++) = '\0';
> > - if (name_only) {
> > - printf("%s ", nd->s);
> > - continue;
> > - }
> > - nd2 = strlist__next(nd);
> > - if (nd2) {
> > - ptr = strchr(nd2->s, '@');
> > - if (ptr)
> > - *ptr = '\0';
> > - if (strcmp(nd->s, nd2->s) == 0)
> > - show_detail = true;
> > - }
> > - if (show_detail) {
> > - path = build_id_cache__origname(buf);
> > - ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
> > - if (ret > 0) {
> > - printf(" %-50s [%s]\n", buf, "SDT event");
> > - free(buf);
> > - }
> > - free(path);
> > - } else
> > - printf(" %-50s [%s]\n", nd->s, "SDT event");
> > - if (nd2) {
> > - if (strcmp(nd->s, nd2->s) != 0)
> > - show_detail = false;
> > - if (ptr)
> > - *ptr = '@';
> > - }
> > - }
> > - strlist__delete(sdtlist);
> > -}
> > -
> > -int print_hwcache_events(const char *event_glob, bool name_only)
> > -{
> > - unsigned int type, op, i, evt_i = 0, evt_num = 0;
> > - char name[64];
> > - char **evt_list = NULL;
> > - bool evt_num_known = false;
> > -
> > -restart:
> > - if (evt_num_known) {
> > - evt_list = zalloc(sizeof(char *) * evt_num);
> > - if (!evt_list)
> > - goto out_enomem;
> > - }
> > -
> > - for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
> > - for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
> > - /* skip invalid cache type */
> > - if (!evsel__is_cache_op_valid(type, op))
> > - continue;
> > -
> > - for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
> > - __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
> > - if (event_glob != NULL && !strglobmatch(name, event_glob))
> > - continue;
> > -
> > - if (!is_event_supported(PERF_TYPE_HW_CACHE,
> > - type | (op << 8) | (i << 16)))
> > - continue;
> > -
> > - if (!evt_num_known) {
> > - evt_num++;
> > - continue;
> > - }
> > -
> > - evt_list[evt_i] = strdup(name);
> > - if (evt_list[evt_i] == NULL)
> > - goto out_enomem;
> > - evt_i++;
> > - }
> > - }
> > - }
> > -
> > - if (!evt_num_known) {
> > - evt_num_known = true;
> > - goto restart;
> > - }
> > - qsort(evt_list, evt_num, sizeof(char *), cmp_string);
> > - evt_i = 0;
> > - while (evt_i < evt_num) {
> > - if (name_only) {
> > - printf("%s ", evt_list[evt_i++]);
> > - continue;
> > - }
> > - printf(" %-50s [%s]\n", evt_list[evt_i++],
> > - event_type_descriptors[PERF_TYPE_HW_CACHE]);
> > - }
> > - if (evt_num && pager_in_use())
> > - printf("\n");
> > -
> > -out_free:
> > - evt_num = evt_i;
> > - for (evt_i = 0; evt_i < evt_num; evt_i++)
> > - zfree(&evt_list[evt_i]);
> > - zfree(&evt_list);
> > - return evt_num;
> > -
> > -out_enomem:
> > - printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
> > - if (evt_list)
> > - goto out_free;
> > - return evt_num;
> > -}
> > -
> > -static void print_tool_event(const char *name, const char *event_glob,
> > - bool name_only)
> > -{
> > - if (event_glob && !strglobmatch(name, event_glob))
> > - return;
> > - if (name_only)
> > - printf("%s ", name);
> > - else
> > - printf(" %-50s [%s]\n", name, "Tool event");
> > -
> > -}
> > -
> > -void print_tool_events(const char *event_glob, bool name_only)
> > -{
> > - print_tool_event("duration_time", event_glob, name_only);
> > - if (pager_in_use())
> > - printf("\n");
> > -}
> > -
> > -void print_symbol_events(const char *event_glob, unsigned type,
> > - struct event_symbol *syms, unsigned max,
> > - bool name_only)
> > -{
> > - unsigned int i, evt_i = 0, evt_num = 0;
> > - char name[MAX_NAME_LEN];
> > - char **evt_list = NULL;
> > - bool evt_num_known = false;
> > -
> > -restart:
> > - if (evt_num_known) {
> > - evt_list = zalloc(sizeof(char *) * evt_num);
> > - if (!evt_list)
> > - goto out_enomem;
> > - syms -= max;
> > - }
> > -
> > - for (i = 0; i < max; i++, syms++) {
> > -
> > - if (event_glob != NULL && syms->symbol != NULL &&
> > - !(strglobmatch(syms->symbol, event_glob) ||
> > - (syms->alias && strglobmatch(syms->alias, event_glob))))
> > - continue;
> > -
> > - if (!is_event_supported(type, i))
> > - continue;
> > -
> > - if (!evt_num_known) {
> > - evt_num++;
> > - continue;
> > - }
> > -
> > - if (!name_only && strlen(syms->alias))
> > - snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
> > - else
> > - strlcpy(name, syms->symbol, MAX_NAME_LEN);
> > -
> > - evt_list[evt_i] = strdup(name);
> > - if (evt_list[evt_i] == NULL)
> > - goto out_enomem;
> > - evt_i++;
> > - }
> > -
> > - if (!evt_num_known) {
> > - evt_num_known = true;
> > - goto restart;
> > - }
> > - qsort(evt_list, evt_num, sizeof(char *), cmp_string);
> > - evt_i = 0;
> > - while (evt_i < evt_num) {
> > - if (name_only) {
> > - printf("%s ", evt_list[evt_i++]);
> > - continue;
> > - }
> > - printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
> > - }
> > - if (evt_num && pager_in_use())
> > - printf("\n");
> > -
> > -out_free:
> > - evt_num = evt_i;
> > - for (evt_i = 0; evt_i < evt_num; evt_i++)
> > - zfree(&evt_list[evt_i]);
> > - zfree(&evt_list);
> > - return;
> > -
> > -out_enomem:
> > - printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
> > - if (evt_list)
> > - goto out_free;
> > -}
> > -
> > -/*
> > - * Print the help text for the event symbols:
> > - */
> > -void print_events(const char *event_glob, bool name_only, bool quiet_flag,
> > - bool long_desc, bool details_flag, bool deprecated)
> > -{
> > - print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
> > - event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
> > -
> > - print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
> > - event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
> > - print_tool_events(event_glob, name_only);
> > -
> > - print_hwcache_events(event_glob, name_only);
> > -
> > - print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
> > - details_flag, deprecated);
> > -
> > - if (event_glob != NULL)
> > - return;
> > -
> > - if (!name_only) {
> > - printf(" %-50s [%s]\n",
> > - "rNNN",
> > - event_type_descriptors[PERF_TYPE_RAW]);
> > - printf(" %-50s [%s]\n",
> > - "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
> > - event_type_descriptors[PERF_TYPE_RAW]);
> > - if (pager_in_use())
> > - printf(" (see 'man perf-list' on how to encode it)\n\n");
> > -
> > - printf(" %-50s [%s]\n",
> > - "mem:<addr>[/len][:access]",
> > - event_type_descriptors[PERF_TYPE_BREAKPOINT]);
> > - if (pager_in_use())
> > - printf("\n");
> > - }
> > -
> > - print_tracepoint_events(NULL, NULL, name_only);
> > -
> > - print_sdt_events(NULL, NULL, name_only);
> > -
> > - metricgroup__print(true, true, NULL, name_only, details_flag);
> > -
> > - print_libpfm_events(name_only, long_desc);
> > -}
> > -
> > int parse_events__is_hardcoded_term(struct parse_events_term *term)
> > {
> > return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
> > diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
> > index e80c9b74f2f2..7cea425e80f9 100644
> > --- a/tools/perf/util/parse-events.h
> > +++ b/tools/perf/util/parse-events.h
> > @@ -11,7 +11,6 @@
> > #include <linux/perf_event.h>
> > #include <string.h>
> >
> > -struct list_head;
> > struct evsel;
> > struct evlist;
> > struct parse_events_error;
> > @@ -19,14 +18,6 @@ struct parse_events_error;
> > struct option;
> > struct perf_pmu;
> >
> > -struct tracepoint_path {
> > - char *system;
> > - char *name;
> > - struct tracepoint_path *next;
> > -};
> > -
> > -struct tracepoint_path *tracepoint_id_to_path(u64 config);
> > -struct tracepoint_path *tracepoint_name_to_path(const char *name);
> > bool have_tracepoints(struct list_head *evlist);
> >
> > const char *event_type(int type);
> > @@ -46,8 +37,6 @@ int parse_events_terms(struct list_head *terms, const char *str);
> > int parse_filter(const struct option *opt, const char *str, int unset);
> > int exclude_perf(const struct option *opt, const char *arg, int unset);
> >
> > -#define EVENTS_HELP_MAX (128*1024)
> > -
> > enum perf_pmu_event_symbol_type {
> > PMU_EVENT_SYMBOL_ERR, /* not a PMU EVENT */
> > PMU_EVENT_SYMBOL, /* normal style PMU event */
> > @@ -55,11 +44,6 @@ enum perf_pmu_event_symbol_type {
> > PMU_EVENT_SYMBOL_SUFFIX, /* suffix of pre-suf style event */
> > };
> >
> > -struct perf_pmu_event_symbol {
> > - char *symbol;
> > - enum perf_pmu_event_symbol_type type;
> > -};
> > -
> > enum {
> > PARSE_EVENTS__TERM_TYPE_NUM,
> > PARSE_EVENTS__TERM_TYPE_STR,
> > @@ -216,8 +200,6 @@ void parse_events_update_lists(struct list_head *list_event,
> > void parse_events_evlist_error(struct parse_events_state *parse_state,
> > int idx, const char *str);
> >
> > -void print_events(const char *event_glob, bool name_only, bool quiet,
> > - bool long_desc, bool details_flag, bool deprecated);
> >
> > struct event_symbol {
> > const char *symbol;
> > @@ -225,18 +207,7 @@ struct event_symbol {
> > };
> > extern struct event_symbol event_symbols_hw[];
> > extern struct event_symbol event_symbols_sw[];
> > -void print_symbol_events(const char *event_glob, unsigned type,
> > - struct event_symbol *syms, unsigned max,
> > - bool name_only);
> > -void print_tool_events(const char *event_glob, bool name_only);
> > -void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
> > - bool name_only);
> > -int print_hwcache_events(const char *event_glob, bool name_only);
> > -void print_sdt_events(const char *subsys_glob, const char *event_glob,
> > - bool name_only);
> > -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,
> > diff --git a/tools/perf/util/print-events.c b/tools/perf/util/print-events.c
> > new file mode 100644
> > index 000000000000..584888353d13
> > --- /dev/null
> > +++ b/tools/perf/util/print-events.c
> > @@ -0,0 +1,472 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +#include <dirent.h>
> > +#include <errno.h>
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <string.h>
> > +#include <sys/param.h>
> > +
> > +#include <api/fs/tracing_path.h>
> > +#include <linux/perf_event.h>
> > +#include <linux/zalloc.h>
> > +#include <subcmd/pager.h>
> > +
> > +#include "build-id.h"
> > +#include "debug.h"
> > +#include "evsel.h"
> > +#include "metricgroup.h"
> > +#include "parse-events.h"
> > +#include "pmu.h"
> > +#include "print-events.h"
> > +#include "probe-file.h"
> > +#include "string2.h"
> > +#include "strlist.h"
> > +#include "thread_map.h"
> > +#include "tracepoint.h"
> > +#include "pfm.h"
> > +
> > +#define MAX_NAME_LEN 100
> > +
> > +static int cmp_string(const void *a, const void *b)
> > +{
> > + const char * const *as = a;
> > + const char * const *bs = b;
> > +
> > + return strcmp(*as, *bs);
> > +}
> > +
> > +static const char * const event_type_descriptors[] = {
> > + "Hardware event",
> > + "Software event",
> > + "Tracepoint event",
> > + "Hardware cache event",
> > + "Raw hardware event descriptor",
> > + "Hardware breakpoint",
> > +};
> > +
> > +/*
> > + * Print the events from <debugfs_mount_point>/tracing/events
> > + */
> > +void print_tracepoint_events(const char *subsys_glob,
> > + const char *event_glob, bool name_only)
> > +{
> > + DIR *sys_dir, *evt_dir;
> > + struct dirent *sys_dirent, *evt_dirent;
> > + char evt_path[MAXPATHLEN];
> > + char *dir_path;
> > + char **evt_list = NULL;
> > + unsigned int evt_i = 0, evt_num = 0;
> > + bool evt_num_known = false;
> > +
> > +restart:
> > + sys_dir = tracing_events__opendir();
> > + if (!sys_dir)
> > + return;
> > +
> > + if (evt_num_known) {
> > + evt_list = zalloc(sizeof(char *) * evt_num);
> > + if (!evt_list)
> > + goto out_close_sys_dir;
> > + }
> > +
> > + for_each_subsystem(sys_dir, sys_dirent) {
> > + if (subsys_glob != NULL &&
> > + !strglobmatch(sys_dirent->d_name, subsys_glob))
> > + continue;
> > +
> > + dir_path = get_events_file(sys_dirent->d_name);
> > + if (!dir_path)
> > + continue;
> > + evt_dir = opendir(dir_path);
> > + if (!evt_dir)
> > + goto next;
> > +
> > + for_each_event(dir_path, evt_dir, evt_dirent) {
> > + if (event_glob != NULL &&
> > + !strglobmatch(evt_dirent->d_name, event_glob))
> > + continue;
> > +
> > + if (!evt_num_known) {
> > + evt_num++;
> > + continue;
> > + }
> > +
> > + snprintf(evt_path, MAXPATHLEN, "%s:%s",
> > + sys_dirent->d_name, evt_dirent->d_name);
> > +
> > + evt_list[evt_i] = strdup(evt_path);
> > + if (evt_list[evt_i] == NULL) {
> > + put_events_file(dir_path);
> > + goto out_close_evt_dir;
> > + }
> > + evt_i++;
> > + }
> > + closedir(evt_dir);
> > +next:
> > + put_events_file(dir_path);
> > + }
> > + closedir(sys_dir);
> > +
> > + if (!evt_num_known) {
> > + evt_num_known = true;
> > + goto restart;
> > + }
> > + qsort(evt_list, evt_num, sizeof(char *), cmp_string);
> > + evt_i = 0;
> > + while (evt_i < evt_num) {
> > + if (name_only) {
> > + printf("%s ", evt_list[evt_i++]);
> > + continue;
> > + }
> > + printf(" %-50s [%s]\n", evt_list[evt_i++],
> > + event_type_descriptors[PERF_TYPE_TRACEPOINT]);
> > + }
> > + if (evt_num && pager_in_use())
> > + printf("\n");
> > +
> > +out_free:
> > + evt_num = evt_i;
> > + for (evt_i = 0; evt_i < evt_num; evt_i++)
> > + zfree(&evt_list[evt_i]);
> > + zfree(&evt_list);
> > + return;
> > +
> > +out_close_evt_dir:
> > + closedir(evt_dir);
> > +out_close_sys_dir:
> > + closedir(sys_dir);
> > +
> > + printf("FATAL: not enough memory to print %s\n",
> > + event_type_descriptors[PERF_TYPE_TRACEPOINT]);
> > + if (evt_list)
> > + goto out_free;
> > +}
> > +
> > +void print_sdt_events(const char *subsys_glob, const char *event_glob,
> > + bool name_only)
> > +{
> > + struct probe_cache *pcache;
> > + struct probe_cache_entry *ent;
> > + struct strlist *bidlist, *sdtlist;
> > + struct strlist_config cfg = {.dont_dupstr = true};
> > + struct str_node *nd, *nd2;
> > + char *buf, *path, *ptr = NULL;
> > + bool show_detail = false;
> > + int ret;
> > +
> > + sdtlist = strlist__new(NULL, &cfg);
> > + if (!sdtlist) {
> > + pr_debug("Failed to allocate new strlist for SDT\n");
> > + return;
> > + }
> > + bidlist = build_id_cache__list_all(true);
> > + if (!bidlist) {
> > + pr_debug("Failed to get buildids: %d\n", errno);
> > + return;
> > + }
> > + strlist__for_each_entry(nd, bidlist) {
> > + pcache = probe_cache__new(nd->s, NULL);
> > + if (!pcache)
> > + continue;
> > + list_for_each_entry(ent, &pcache->entries, node) {
> > + if (!ent->sdt)
> > + continue;
> > + if (subsys_glob &&
> > + !strglobmatch(ent->pev.group, subsys_glob))
> > + continue;
> > + if (event_glob &&
> > + !strglobmatch(ent->pev.event, event_glob))
> > + continue;
> > + ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
> > + ent->pev.event, nd->s);
> > + if (ret > 0)
> > + strlist__add(sdtlist, buf);
> > + }
> > + probe_cache__delete(pcache);
> > + }
> > + strlist__delete(bidlist);
> > +
> > + strlist__for_each_entry(nd, sdtlist) {
> > + buf = strchr(nd->s, '@');
> > + if (buf)
> > + *(buf++) = '\0';
> > + if (name_only) {
> > + printf("%s ", nd->s);
> > + continue;
> > + }
> > + nd2 = strlist__next(nd);
> > + if (nd2) {
> > + ptr = strchr(nd2->s, '@');
> > + if (ptr)
> > + *ptr = '\0';
> > + if (strcmp(nd->s, nd2->s) == 0)
> > + show_detail = true;
> > + }
> > + if (show_detail) {
> > + path = build_id_cache__origname(buf);
> > + ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
> > + if (ret > 0) {
> > + printf(" %-50s [%s]\n", buf, "SDT event");
> > + free(buf);
> > + }
> > + free(path);
> > + } else
> > + printf(" %-50s [%s]\n", nd->s, "SDT event");
> > + if (nd2) {
> > + if (strcmp(nd->s, nd2->s) != 0)
> > + show_detail = false;
> > + if (ptr)
> > + *ptr = '@';
> > + }
> > + }
> > + strlist__delete(sdtlist);
> > +}
> > +
> > +static bool is_event_supported(u8 type, unsigned int config)
> > +{
> > + bool ret = true;
> > + int open_return;
> > + struct evsel *evsel;
> > + struct perf_event_attr attr = {
> > + .type = type,
> > + .config = config,
> > + .disabled = 1,
> > + };
> > + struct perf_thread_map *tmap = thread_map__new_by_tid(0);
> > +
> > + if (tmap == NULL)
> > + return false;
> > +
> > + evsel = evsel__new(&attr);
> > + if (evsel) {
> > + open_return = evsel__open(evsel, NULL, tmap);
> > + ret = open_return >= 0;
> > +
> > + if (open_return == -EACCES) {
> > + /*
> > + * This happens if the paranoid value
> > + * /proc/sys/kernel/perf_event_paranoid is set to 2
> > + * Re-run with exclude_kernel set; we don't do that
> > + * by default as some ARM machines do not support it.
> > + *
> > + */
> > + evsel->core.attr.exclude_kernel = 1;
> > + ret = evsel__open(evsel, NULL, tmap) >= 0;
> > + }
> > + evsel__delete(evsel);
> > + }
> > +
> > + perf_thread_map__put(tmap);
> > + return ret;
> > +}
> > +
> > +int print_hwcache_events(const char *event_glob, bool name_only)
> > +{
> > + unsigned int type, op, i, evt_i = 0, evt_num = 0;
> > + char name[64];
> > + char **evt_list = NULL;
> > + bool evt_num_known = false;
> > +
> > +restart:
> > + if (evt_num_known) {
> > + evt_list = zalloc(sizeof(char *) * evt_num);
> > + if (!evt_list)
> > + goto out_enomem;
> > + }
> > +
> > + for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
> > + for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
> > + /* skip invalid cache type */
> > + if (!evsel__is_cache_op_valid(type, op))
> > + continue;
> > +
> > + for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
> > + __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
> > + if (event_glob != NULL && !strglobmatch(name, event_glob))
> > + continue;
> > +
> > + if (!is_event_supported(PERF_TYPE_HW_CACHE,
> > + type | (op << 8) | (i << 16)))
> > + continue;
> > +
> > + if (!evt_num_known) {
> > + evt_num++;
> > + continue;
> > + }
> > +
> > + evt_list[evt_i] = strdup(name);
> > + if (evt_list[evt_i] == NULL)
> > + goto out_enomem;
> > + evt_i++;
> > + }
> > + }
> > + }
> > +
> > + if (!evt_num_known) {
> > + evt_num_known = true;
> > + goto restart;
> > + }
> > + qsort(evt_list, evt_num, sizeof(char *), cmp_string);
> > + evt_i = 0;
> > + while (evt_i < evt_num) {
> > + if (name_only) {
> > + printf("%s ", evt_list[evt_i++]);
> > + continue;
> > + }
> > + printf(" %-50s [%s]\n", evt_list[evt_i++],
> > + event_type_descriptors[PERF_TYPE_HW_CACHE]);
> > + }
> > + if (evt_num && pager_in_use())
> > + printf("\n");
> > +
> > +out_free:
> > + evt_num = evt_i;
> > + for (evt_i = 0; evt_i < evt_num; evt_i++)
> > + zfree(&evt_list[evt_i]);
> > + zfree(&evt_list);
> > + return evt_num;
> > +
> > +out_enomem:
> > + printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
> > + if (evt_list)
> > + goto out_free;
> > + return evt_num;
> > +}
> > +
> > +static void print_tool_event(const char *name, const char *event_glob,
> > + bool name_only)
> > +{
> > + if (event_glob && !strglobmatch(name, event_glob))
> > + return;
> > + if (name_only)
> > + printf("%s ", name);
> > + else
> > + printf(" %-50s [%s]\n", name, "Tool event");
> > +
> > +}
> > +
> > +void print_tool_events(const char *event_glob, bool name_only)
> > +{
> > + print_tool_event("duration_time", event_glob, name_only);
> > + if (pager_in_use())
> > + printf("\n");
> > +}
> > +
> > +void print_symbol_events(const char *event_glob, unsigned int type,
> > + struct event_symbol *syms, unsigned int max,
> > + bool name_only)
> > +{
> > + unsigned int i, evt_i = 0, evt_num = 0;
> > + char name[MAX_NAME_LEN];
> > + char **evt_list = NULL;
> > + bool evt_num_known = false;
> > +
> > +restart:
> > + if (evt_num_known) {
> > + evt_list = zalloc(sizeof(char *) * evt_num);
> > + if (!evt_list)
> > + goto out_enomem;
> > + syms -= max;
> > + }
> > +
> > + for (i = 0; i < max; i++, syms++) {
> > +
> > + if (event_glob != NULL && syms->symbol != NULL &&
> > + !(strglobmatch(syms->symbol, event_glob) ||
> > + (syms->alias && strglobmatch(syms->alias, event_glob))))
> > + continue;
> > +
> > + if (!is_event_supported(type, i))
> > + continue;
> > +
> > + if (!evt_num_known) {
> > + evt_num++;
> > + continue;
> > + }
> > +
> > + if (!name_only && strlen(syms->alias))
> > + snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
> > + else
> > + strlcpy(name, syms->symbol, MAX_NAME_LEN);
> > +
> > + evt_list[evt_i] = strdup(name);
> > + if (evt_list[evt_i] == NULL)
> > + goto out_enomem;
> > + evt_i++;
> > + }
> > +
> > + if (!evt_num_known) {
> > + evt_num_known = true;
> > + goto restart;
> > + }
> > + qsort(evt_list, evt_num, sizeof(char *), cmp_string);
> > + evt_i = 0;
> > + while (evt_i < evt_num) {
> > + if (name_only) {
> > + printf("%s ", evt_list[evt_i++]);
> > + continue;
> > + }
> > + printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
> > + }
> > + if (evt_num && pager_in_use())
> > + printf("\n");
> > +
> > +out_free:
> > + evt_num = evt_i;
> > + for (evt_i = 0; evt_i < evt_num; evt_i++)
> > + zfree(&evt_list[evt_i]);
> > + zfree(&evt_list);
> > + return;
> > +
> > +out_enomem:
> > + printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
> > + if (evt_list)
> > + goto out_free;
> > +}
> > +
> > +/*
> > + * Print the help text for the event symbols:
> > + */
> > +void print_events(const char *event_glob, bool name_only, bool quiet_flag,
> > + bool long_desc, bool details_flag, bool deprecated)
> > +{
> > + print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
> > + event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
> > +
> > + print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
> > + event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
> > + print_tool_events(event_glob, name_only);
> > +
> > + print_hwcache_events(event_glob, name_only);
> > +
> > + print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
> > + details_flag, deprecated);
> > +
> > + if (event_glob != NULL)
> > + return;
> > +
> > + if (!name_only) {
> > + printf(" %-50s [%s]\n",
> > + "rNNN",
> > + event_type_descriptors[PERF_TYPE_RAW]);
> > + printf(" %-50s [%s]\n",
> > + "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
> > + event_type_descriptors[PERF_TYPE_RAW]);
> > + if (pager_in_use())
> > + printf(" (see 'man perf-list' on how to encode it)\n\n");
> > +
> > + printf(" %-50s [%s]\n",
> > + "mem:<addr>[/len][:access]",
> > + event_type_descriptors[PERF_TYPE_BREAKPOINT]);
> > + if (pager_in_use())
> > + printf("\n");
> > + }
> > +
> > + print_tracepoint_events(NULL, NULL, name_only);
> > +
> > + print_sdt_events(NULL, NULL, name_only);
> > +
> > + metricgroup__print(true, true, NULL, name_only, details_flag);
> > +
> > + print_libpfm_events(name_only, long_desc);
> > +}
> > diff --git a/tools/perf/util/print-events.h b/tools/perf/util/print-events.h
> > new file mode 100644
> > index 000000000000..cf64e8129c1b
> > --- /dev/null
> > +++ b/tools/perf/util/print-events.h
> > @@ -0,0 +1,21 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +#ifndef __PERF_PRINT_EVENTS_H
> > +#define __PERF_PRINT_EVENTS_H
> > +
> > +#include <stdbool.h>
> > +
> > +struct event_symbol;
> > +
> > +void print_events(const char *event_glob, bool name_only, bool quiet,
> > + bool long_desc, bool details_flag, bool deprecated);
> > +int print_hwcache_events(const char *event_glob, bool name_only);
> > +void print_sdt_events(const char *subsys_glob, const char *event_glob,
> > + bool name_only);
> > +void print_symbol_events(const char *event_glob, unsigned int type,
> > + struct event_symbol *syms, unsigned int max,
> > + bool name_only);
> > +void print_tool_events(const char *event_glob, bool name_only);
> > +void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
> > + bool name_only);
> > +
> > +#endif /* __PERF_PRINT_EVENTS_H */
> > diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
> > index a65f65d0857e..fbc6d14aabbb 100644
> > --- a/tools/perf/util/trace-event-info.c
> > +++ b/tools/perf/util/trace-event-info.c
> > @@ -19,16 +19,24 @@
> > #include <linux/kernel.h>
> > #include <linux/zalloc.h>
> > #include <internal/lib.h> // page_size
> > +#include <sys/param.h>
> >
> > #include "trace-event.h"
> > +#include "tracepoint.h"
> > #include <api/fs/tracing_path.h>
> > #include "evsel.h"
> > #include "debug.h"
> >
> > #define VERSION "0.6"
> > +#define MAX_EVENT_LENGTH 512
> >
> > static int output_fd;
> >
> > +struct tracepoint_path {
> > + char *system;
> > + char *name;
> > + struct tracepoint_path *next;
> > +};
> >
> > int bigendian(void)
> > {
> > @@ -400,6 +408,92 @@ put_tracepoints_path(struct tracepoint_path *tps)
> > }
> > }
> >
> > +static struct tracepoint_path *tracepoint_id_to_path(u64 config)
> > +{
> > + struct tracepoint_path *path = NULL;
> > + DIR *sys_dir, *evt_dir;
> > + struct dirent *sys_dirent, *evt_dirent;
> > + char id_buf[24];
> > + int fd;
> > + u64 id;
> > + char evt_path[MAXPATHLEN];
> > + char *dir_path;
> > +
> > + sys_dir = tracing_events__opendir();
> > + if (!sys_dir)
> > + return NULL;
> > +
> > + for_each_subsystem(sys_dir, sys_dirent) {
> > + dir_path = get_events_file(sys_dirent->d_name);
> > + if (!dir_path)
> > + continue;
> > + evt_dir = opendir(dir_path);
> > + if (!evt_dir)
> > + goto next;
> > +
> > + for_each_event(dir_path, evt_dir, evt_dirent) {
> > +
> > + scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
> > + evt_dirent->d_name);
> > + fd = open(evt_path, O_RDONLY);
> > + if (fd < 0)
> > + continue;
> > + if (read(fd, id_buf, sizeof(id_buf)) < 0) {
> > + close(fd);
> > + continue;
> > + }
> > + close(fd);
> > + id = atoll(id_buf);
> > + if (id == config) {
> > + put_events_file(dir_path);
> > + closedir(evt_dir);
> > + closedir(sys_dir);
> > + path = zalloc(sizeof(*path));
> > + if (!path)
> > + return NULL;
> > + if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
> > + free(path);
> > + return NULL;
> > + }
> > + if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
> > + zfree(&path->system);
> > + free(path);
> > + return NULL;
> > + }
> > + return path;
> > + }
> > + }
> > + closedir(evt_dir);
> > +next:
> > + put_events_file(dir_path);
> > + }
> > +
> > + closedir(sys_dir);
> > + return NULL;
> > +}
> > +
> > +static struct tracepoint_path *tracepoint_name_to_path(const char *name)
> > +{
> > + struct tracepoint_path *path = zalloc(sizeof(*path));
> > + char *str = strchr(name, ':');
> > +
> > + if (path == NULL || str == NULL) {
> > + free(path);
> > + return NULL;
> > + }
> > +
> > + path->system = strndup(name, str - name);
> > + path->name = strdup(str+1);
> > +
> > + if (path->system == NULL || path->name == NULL) {
> > + zfree(&path->system);
> > + zfree(&path->name);
> > + zfree(&path);
> > + }
> > +
> > + return path;
> > +}
> > +
> > static struct tracepoint_path *
> > get_tracepoints_path(struct list_head *pattrs)
> > {
> > diff --git a/tools/perf/util/tracepoint.c b/tools/perf/util/tracepoint.c
> > new file mode 100644
> > index 000000000000..89ef56c43311
> > --- /dev/null
> > +++ b/tools/perf/util/tracepoint.c
> > @@ -0,0 +1,63 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +#include "tracepoint.h"
> > +
> > +#include <errno.h>
> > +#include <fcntl.h>
> > +#include <stdio.h>
> > +#include <sys/param.h>
> > +#include <unistd.h>
> > +
> > +#include <api/fs/tracing_path.h>
> > +
> > +int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
> > +{
> > + char evt_path[MAXPATHLEN];
> > + int fd;
> > +
> > + snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
> > + fd = open(evt_path, O_RDONLY);
> > + if (fd < 0)
> > + return -EINVAL;
> > + close(fd);
> > +
> > + return 0;
> > +}
> > +
> > +/*
> > + * Check whether event is in <debugfs_mount_point>/tracing/events
> > + */
> > +int is_valid_tracepoint(const char *event_string)
> > +{
> > + DIR *sys_dir, *evt_dir;
> > + struct dirent *sys_dirent, *evt_dirent;
> > + char evt_path[MAXPATHLEN];
> > + char *dir_path;
> > +
> > + sys_dir = tracing_events__opendir();
> > + if (!sys_dir)
> > + return 0;
> > +
> > + for_each_subsystem(sys_dir, sys_dirent) {
> > + dir_path = get_events_file(sys_dirent->d_name);
> > + if (!dir_path)
> > + continue;
> > + evt_dir = opendir(dir_path);
> > + if (!evt_dir)
> > + goto next;
> > +
> > + for_each_event(dir_path, evt_dir, evt_dirent) {
> > + snprintf(evt_path, MAXPATHLEN, "%s:%s",
> > + sys_dirent->d_name, evt_dirent->d_name);
> > + if (!strcmp(evt_path, event_string)) {
> > + closedir(evt_dir);
> > + closedir(sys_dir);
> > + return 1;
> > + }
> > + }
> > + closedir(evt_dir);
> > +next:
> > + put_events_file(dir_path);
> > + }
> > + closedir(sys_dir);
> > + return 0;
> > +}
> > diff --git a/tools/perf/util/tracepoint.h b/tools/perf/util/tracepoint.h
> > new file mode 100644
> > index 000000000000..c4a110fe87d7
> > --- /dev/null
> > +++ b/tools/perf/util/tracepoint.h
> > @@ -0,0 +1,25 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +#ifndef __PERF_TRACEPOINT_H
> > +#define __PERF_TRACEPOINT_H
> > +
> > +#include <dirent.h>
> > +#include <string.h>
> > +
> > +int tp_event_has_id(const char *dir_path, struct dirent *evt_dir);
> > +
> > +#define for_each_event(dir_path, evt_dir, evt_dirent) \
> > + while ((evt_dirent = readdir(evt_dir)) != NULL) \
> > + if (evt_dirent->d_type == DT_DIR && \
> > + (strcmp(evt_dirent->d_name, ".")) && \
> > + (strcmp(evt_dirent->d_name, "..")) && \
> > + (!tp_event_has_id(dir_path, evt_dirent)))
> > +
> > +#define for_each_subsystem(sys_dir, sys_dirent) \
> > + while ((sys_dirent = readdir(sys_dir)) != NULL) \
> > + if (sys_dirent->d_type == DT_DIR && \
> > + (strcmp(sys_dirent->d_name, ".")) && \
> > + (strcmp(sys_dirent->d_name, "..")))
> > +
> > +int is_valid_tracepoint(const char *event_string);
> > +
> > +#endif /* __PERF_TRACEPOINT_H */
> > --
> > 2.30.0.365.g02bc693789-goog
> >
>
> --
>
> - Arnaldo
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