Re: [PATCH 2/2] perf parse-events: Break out tracepoint and printing.
From: Arnaldo Carvalho de Melo
Date: Wed Feb 03 2021 - 11:22:36 EST
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.
- Arnaldo
> Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
> ---
> 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