[RFC PATCH perf/core v3 15/17] perf-list: Show SDT events

[Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>]

Show SDT events by perf-list as below.

  ----
  # perf list sdt | head -n 7

  List of pre-defined events (to be used in -e):

    sdt_libc:lll_futex_wake                            [SDT event]
    sdt_libc:lll_lock_wait_private                     [SDT event]
    sdt_libc:longjmp                                   [SDT event]
    sdt_libc:longjmp_target                            [SDT event]
  ----

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
 tools/perf/builtin-list.c      |    3 +
 tools/perf/util/parse-events.c |   83 ++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/parse-events.h |    2 +
 3 files changed, 88 insertions(+)

diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index af5bd05..85331e1 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -60,6 +60,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
 			print_hwcache_events(NULL, raw_dump);
 		else if (strcmp(argv[i], "pmu") == 0)
 			print_pmu_events(NULL, raw_dump);
+		else if (strcmp(argv[i], "sdt") == 0)
+			print_sdt_events(NULL, NULL, raw_dump);
 		else {
 			char *sep = strchr(argv[i], ':'), *s;
 			int sep_idx;
@@ -75,6 +77,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
 
 			s[sep_idx] = '\0';
 			print_tracepoint_events(s, s + sep_idx + 1, raw_dump);
+			print_sdt_events(s, s + sep_idx + 1, raw_dump);
 			free(s);
 		}
 	}
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index d826e6f..485dbdc 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -5,6 +5,7 @@
 #include "evsel.h"
 #include "parse-options.h"
 #include "parse-events.h"
+#include "probe-file.h"
 #include "exec_cmd.h"
 #include "string.h"
 #include "symbol.h"
@@ -1519,6 +1520,86 @@ static bool is_event_supported(u8 type, unsigned config)
 	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;
+	}
+	ret = build_id_cache__list_all(&bidlist);
+	if (ret < 0) {
+		pr_debug("Failed to get buildids: %d\n", ret);
+		return;
+	}
+	strlist__for_each(nd, bidlist) {
+		pcache = probe_cache__new(nd->s);
+		if (!pcache)
+			continue;
+		if (!list_empty(&pcache->list))
+			list_for_each_entry(ent, &pcache->list, list) {
+				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(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 + 1);
+			ret = asprintf(&buf, "%s@%s@0x%.12s", nd->s, path, buf + 1);
+			if (ret > 0) {
+				printf("  %-50s [%s]\n", buf, "SDT event");
+				free(buf);
+			}
+		} 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;
@@ -1700,6 +1781,8 @@ void print_events(const char *event_glob, bool name_only)
 	}
 
 	print_tracepoint_events(NULL, NULL, name_only);
+
+	print_sdt_events(NULL, NULL, name_only);
 }
 
 int parse_events__is_hardcoded_term(struct parse_events_term *term)
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index a09b0e2..5dc631d 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -151,6 +151,8 @@ void print_symbol_events(const char *event_glob, unsigned type,
 				bool name_only);
 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
 			     bool name_only);
+void print_sdt_events(const char *subsys_glob, const char *event_glob,
+		      bool name_only);
 int print_hwcache_events(const char *event_glob, bool name_only);
 extern int is_valid_tracepoint(const char *event_string);