[PATCH v3 2/2] perf parse-events: Break out tracepoint and printing.

From: Ian Rogers
Date: Fri Jul 29 2022 - 16:42:46 EST

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.
Fix some line length warnings too.

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 | 713 +----------------------------
tools/perf/util/parse-events.h | 31 --
tools/perf/util/print-events.c | 571 +++++++++++++++++++++++
tools/perf/util/print-events.h | 22 +
tools/perf/util/trace-event-info.c | 96 ++++
tools/perf/util/tracepoint.c | 63 +++
tools/perf/util/tracepoint.h | 25 +
12 files changed, 790 insertions(+), 738 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 468958154ed9..744dd3520584 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/pmu-hybrid.h"
#include "util/debug.h"
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 041801d8b6ac..fcd5c009afec 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -14,6 +14,7 @@
#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 afce731cec16..e2e9ad929baf 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -36,6 +36,7 @@
#include "util/data.h"
#include "util/debug.h"
#include "util/string2.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 f075cf37a65e..1e1f10a1971d 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 66ad30cf65ec..6d0f7e29c42b 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -26,6 +26,8 @@ perf-y += mmap.o
perf-y += memswap.o
perf-y += parse-events.o
perf-y += parse-events-hybrid.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 8012db830814..206c76623c06 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -5,18 +5,12 @@
#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 "bpf-loader.h"
@@ -26,20 +20,22 @@
#include "parse-events-bison.h"
#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 "util/parse-events-hybrid.h"
#include "util/pmu-hybrid.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
@@ -153,21 +149,6 @@ struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
},
};

-struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
- [PERF_TOOL_DURATION_TIME] = {
- .symbol = "duration_time",
- .alias = "",
- },
- [PERF_TOOL_USER_TIME] = {
- .symbol = "user_time",
- .alias = "",
- },
- [PERF_TOOL_SYSTEM_TIME] = {
- .symbol = "system_time",
- .alias = "",
- },
-};
-
#define __PERF_EVENT_FIELD(config, name) \
((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)

@@ -176,121 +157,6 @@ struct event_symbol event_symbols_tool[PERF_TOOL_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
-
-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) {
@@ -2665,571 +2531,6 @@ 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, u64 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, npmus = 0;
- char name[64], new_name[128];
- char **evt_list = NULL, **evt_pmus = NULL;
- bool evt_num_known = false;
- struct perf_pmu *pmu = NULL;
-
- if (perf_pmu__has_hybrid()) {
- npmus = perf_pmu__hybrid_pmu_num();
- evt_pmus = zalloc(sizeof(char *) * npmus);
- if (!evt_pmus)
- goto out_enomem;
- }
-
-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++) {
- unsigned int hybrid_supported = 0, j;
- bool supported;
-
- __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
- if (event_glob != NULL && !strglobmatch(name, event_glob))
- continue;
-
- if (!perf_pmu__has_hybrid()) {
- if (!is_event_supported(PERF_TYPE_HW_CACHE,
- type | (op << 8) | (i << 16))) {
- continue;
- }
- } else {
- perf_pmu__for_each_hybrid_pmu(pmu) {
- if (!evt_num_known) {
- evt_num++;
- continue;
- }
-
- supported = is_event_supported(
- PERF_TYPE_HW_CACHE,
- type | (op << 8) | (i << 16) |
- ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT));
- if (supported) {
- snprintf(new_name, sizeof(new_name), "%s/%s/",
- pmu->name, name);
- evt_pmus[hybrid_supported] = strdup(new_name);
- hybrid_supported++;
- }
- }
-
- if (hybrid_supported == 0)
- continue;
- }
-
- if (!evt_num_known) {
- evt_num++;
- continue;
- }
-
- if ((hybrid_supported == 0) ||
- (hybrid_supported == npmus)) {
- evt_list[evt_i] = strdup(name);
- if (npmus > 0) {
- for (j = 0; j < npmus; j++)
- zfree(&evt_pmus[j]);
- }
- } else {
- for (j = 0; j < hybrid_supported; j++) {
- evt_list[evt_i++] = evt_pmus[j];
- evt_pmus[j] = NULL;
- }
- continue;
- }
-
- if (evt_list[evt_i] == NULL)
- goto out_enomem;
- evt_i++;
- }
- }
- }
-
- if (!evt_num_known) {
- evt_num_known = true;
- goto restart;
- }
-
- for (evt_i = 0; evt_i < evt_num; evt_i++) {
- if (!evt_list[evt_i])
- break;
- }
-
- evt_num = evt_i;
- 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);
-
- for (evt_i = 0; evt_i < npmus; evt_i++)
- zfree(&evt_pmus[evt_i]);
- zfree(&evt_pmus);
- 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 struct event_symbol *syms, const char *event_glob,
- bool name_only)
-{
- if (syms->symbol == NULL)
- return;
-
- if (event_glob && !(strglobmatch(syms->symbol, event_glob) ||
- (syms->alias && strglobmatch(syms->alias, event_glob))))
- return;
-
- if (name_only)
- printf("%s ", syms->symbol);
- else {
- char name[MAX_NAME_LEN];
- if (syms->alias && strlen(syms->alias))
- snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
- else
- strlcpy(name, syms->symbol, MAX_NAME_LEN);
- printf(" %-50s [%s]\n", name, "Tool event");
- }
-}
-
-void print_tool_events(const char *event_glob, bool name_only)
-{
- // Start at 1 because the first enum entry symbols no tool event
- for (int i = 1; i < PERF_TOOL_MAX; ++i) {
- print_tool_event(event_symbols_tool + i, 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++) {
- /*
- * New attr.config still not supported here, the latest
- * example was PERF_COUNT_SW_CGROUP_SWITCHES
- */
- if (syms->symbol == NULL)
- continue;
-
- if (event_glob != 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,
- const char *pmu_name)
-{
- 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, pmu_name);
-
- 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,
- pmu_name);
-
- 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 a38b8b160e80..ba9fa3ddaf6e 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 */
@@ -56,11 +45,6 @@ enum perf_pmu_event_symbol_type {
PMU_EVENT_SYMBOL_SUFFIX2, /* suffix of pre-suf2 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,
@@ -219,28 +203,13 @@ 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,
- const char *pmu_name);
-
struct event_symbol {
const char *symbol;
const char *alias;
};
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_error__init(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..3b071e57b4a0
--- /dev/null
+++ b/tools/perf/util/print-events.c
@@ -0,0 +1,571 @@
+// 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"
+#include "pmu-hybrid.h"
+
+#define MAX_NAME_LEN 100
+
+static const char * const event_type_descriptors[] = {
+ "Hardware event",
+ "Software event",
+ "Tracepoint event",
+ "Hardware cache event",
+ "Raw hardware event descriptor",
+ "Hardware breakpoint",
+};
+
+static const struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
+ [PERF_TOOL_DURATION_TIME] = {
+ .symbol = "duration_time",
+ .alias = "",
+ },
+ [PERF_TOOL_USER_TIME] = {
+ .symbol = "user_time",
+ .alias = "",
+ },
+ [PERF_TOOL_SYSTEM_TIME] = {
+ .symbol = "system_time",
+ .alias = "",
+ },
+};
+
+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;
+}
+
+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, npmus = 0;
+ char name[64], new_name[128];
+ char **evt_list = NULL, **evt_pmus = NULL;
+ bool evt_num_known = false;
+ struct perf_pmu *pmu = NULL;
+
+ if (perf_pmu__has_hybrid()) {
+ npmus = perf_pmu__hybrid_pmu_num();
+ evt_pmus = zalloc(sizeof(char *) * npmus);
+ if (!evt_pmus)
+ goto out_enomem;
+ }
+
+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++) {
+ unsigned int hybrid_supported = 0, j;
+ bool supported;
+
+ __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
+ if (event_glob != NULL && !strglobmatch(name, event_glob))
+ continue;
+
+ if (!perf_pmu__has_hybrid()) {
+ if (!is_event_supported(PERF_TYPE_HW_CACHE,
+ type | (op << 8) | (i << 16))) {
+ continue;
+ }
+ } else {
+ perf_pmu__for_each_hybrid_pmu(pmu) {
+ if (!evt_num_known) {
+ evt_num++;
+ continue;
+ }
+
+ supported = is_event_supported(
+ PERF_TYPE_HW_CACHE,
+ type | (op << 8) | (i << 16) |
+ ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT));
+ if (supported) {
+ snprintf(new_name, sizeof(new_name),
+ "%s/%s/", pmu->name, name);
+ evt_pmus[hybrid_supported] =
+ strdup(new_name);
+ hybrid_supported++;
+ }
+ }
+
+ if (hybrid_supported == 0)
+ continue;
+ }
+
+ if (!evt_num_known) {
+ evt_num++;
+ continue;
+ }
+
+ if ((hybrid_supported == 0) ||
+ (hybrid_supported == npmus)) {
+ evt_list[evt_i] = strdup(name);
+ if (npmus > 0) {
+ for (j = 0; j < npmus; j++)
+ zfree(&evt_pmus[j]);
+ }
+ } else {
+ for (j = 0; j < hybrid_supported; j++) {
+ evt_list[evt_i++] = evt_pmus[j];
+ evt_pmus[j] = NULL;
+ }
+ continue;
+ }
+
+ if (evt_list[evt_i] == NULL)
+ goto out_enomem;
+ evt_i++;
+ }
+ }
+ }
+
+ if (!evt_num_known) {
+ evt_num_known = true;
+ goto restart;
+ }
+
+ for (evt_i = 0; evt_i < evt_num; evt_i++) {
+ if (!evt_list[evt_i])
+ break;
+ }
+
+ evt_num = evt_i;
+ 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);
+
+ for (evt_i = 0; evt_i < npmus; evt_i++)
+ zfree(&evt_pmus[evt_i]);
+ zfree(&evt_pmus);
+ 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 struct event_symbol *syms, const char *event_glob,
+ bool name_only)
+{
+ if (syms->symbol == NULL)
+ return;
+
+ if (event_glob && !(strglobmatch(syms->symbol, event_glob) ||
+ (syms->alias && strglobmatch(syms->alias, event_glob))))
+ return;
+
+ if (name_only)
+ printf("%s ", syms->symbol);
+ else {
+ char name[MAX_NAME_LEN];
+
+ if (syms->alias && strlen(syms->alias))
+ snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
+ else
+ strlcpy(name, syms->symbol, MAX_NAME_LEN);
+ printf(" %-50s [%s]\n", name, "Tool event");
+ }
+}
+
+void print_tool_events(const char *event_glob, bool name_only)
+{
+ // Start at 1 because the first enum entry means no tool event.
+ for (int i = 1; i < PERF_TOOL_MAX; ++i)
+ print_tool_event(event_symbols_tool + i, 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++) {
+ /*
+ * New attr.config still not supported here, the latest
+ * example was PERF_COUNT_SW_CGROUP_SWITCHES
+ */
+ if (syms->symbol == NULL)
+ continue;
+
+ if (event_glob != 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,
+ const char *pmu_name)
+{
+ 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, pmu_name);
+
+ 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,
+ pmu_name);
+
+ 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..1da9910d83a6
--- /dev/null
+++ b/tools/perf/util/print-events.h
@@ -0,0 +1,22 @@
+/* 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_flag,
+ bool long_desc, bool details_flag, bool deprecated,
+ const char *pmu_name);
+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..892c323b4ac9 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 +408,94 @@ 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 */
--
2.37.1.455.g008518b4e5-goog