perf evsel: Rename get_states() to parse_task_states() and make it public

Since get_states() assumes the existence of libtraceevent, so move
to where it should belong, i.e, util/trace-event-parse.c, and also
rename it to parse_task_states().

Leave evsel_getstate() untouched as it fits well in the evsel
category.

Also make some necessary tweaks for python support, and get it
verified with: perf test python.

Signed-off-by: Ze Gao <zegao@tencent.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240123070210.1669843-2-zegao@tencent.com

1 files changed, 1 insertions, 114 deletions

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4d14f14f2506..9e67324b1608 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2851,119 +2851,6 @@ u64 evsel__intval_common(struct evsel *evsel, struct perf_sample *sample, const
 	return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
 }
 
-/*
- * prev_state is of size long, which is 32 bits on 32 bit architectures.
- * As it needs to have the same bits for both 32 bit and 64 bit architectures
- * we can just assume that the flags we care about will all be within
- * the 32 bits.
- */
-#define MAX_STATE_BITS 32
-
-static const char *convert_sym(struct tep_print_flag_sym *sym)
-{
-	static char save_states[MAX_STATE_BITS + 1];
-
-	memset(save_states, 0, sizeof(save_states));
-
-	/* This is the flags for the prev_state_field, now make them into a string */
-	for (; sym; sym = sym->next) {
-		long bitmask = strtoul(sym->value, NULL, 0);
-		int i;
-
-		for (i = 0; !(bitmask & 1); i++)
-			bitmask >>= 1;
-
-		if (i >= MAX_STATE_BITS)
-			continue;
-
-		save_states[i] = sym->str[0];
-	}
-
-	return save_states;
-}
-
-static struct tep_print_arg_field *
-find_arg_field(struct tep_format_field *prev_state_field, struct tep_print_arg *arg)
-{
-	struct tep_print_arg_field *field;
-
-	if (!arg)
-		return NULL;
-
-	if (arg->type == TEP_PRINT_FIELD)
-		return &arg->field;
-
-	if (arg->type == TEP_PRINT_OP) {
-		field = find_arg_field(prev_state_field, arg->op.left);
-		if (field && field->field == prev_state_field)
-			return field;
-		field = find_arg_field(prev_state_field, arg->op.right);
-		if (field && field->field == prev_state_field)
-			return field;
-	}
-	return NULL;
-}
-
-static struct tep_print_flag_sym *
-test_flags(struct tep_format_field *prev_state_field, struct tep_print_arg *arg)
-{
-	struct tep_print_arg_field *field;
-
-	field = find_arg_field(prev_state_field, arg->flags.field);
-	if (!field)
-		return NULL;
-
-	return arg->flags.flags;
-}
-
-static struct tep_print_flag_sym *
-search_op(struct tep_format_field *prev_state_field, struct tep_print_arg *arg)
-{
-	struct tep_print_flag_sym *sym = NULL;
-
-	if (!arg)
-		return NULL;
-
-	if (arg->type == TEP_PRINT_OP) {
-		sym = search_op(prev_state_field, arg->op.left);
-		if (sym)
-			return sym;
-
-		sym = search_op(prev_state_field, arg->op.right);
-		if (sym)
-			return sym;
-	} else if (arg->type == TEP_PRINT_FLAGS) {
-		sym = test_flags(prev_state_field, arg);
-	}
-
-	return sym;
-}
-
-static const char *get_states(struct tep_format_field *prev_state_field)
-{
-	struct tep_print_flag_sym *sym;
-	struct tep_print_arg *arg;
-	struct tep_event *event;
-
-	event = prev_state_field->event;
-
-	/*
-	 * Look at the event format fields, and search for where
-	 * the prev_state is parsed via the format flags.
-	 */
-	for (arg = event->print_fmt.args; arg; arg = arg->next) {
-		/*
-		 * Currently, the __print_flags() for the prev_state
-		 * is embedded in operations, so they too must be
-		 * searched.
-		 */
-		sym = search_op(prev_state_field, arg);
-		if (sym)
-			return convert_sym(sym);
-	}
-	return NULL;
-}
-
 char evsel__taskstate(struct evsel *evsel, struct perf_sample *sample, const char *name)
 {
 	static struct tep_format_field *prev_state_field;
@@ -2979,7 +2866,7 @@ char evsel__taskstate(struct evsel *evsel, struct perf_sample *sample, const cha
 		return state;
 
 	if (!states || field != prev_state_field) {
-		states = get_states(field);
+		states = parse_task_states(field);
 		if (!states)
 			return state;
 		prev_state_field = field;