Allow logging of re_cache statistics

src/libserver/cfg_file.h

@@ -247,6 +247,7 @@ struct rspamd_config {
 	gboolean log_color;                             /**< output colors for console output                   */
 	gboolean log_extended;                          /**< log extended information							*/
 	gboolean log_systemd;                           /**< special case for systemd logger					*/
+	gboolean log_re_cache;                          /**< show statistics about regexps						*/
 
 	gboolean mlock_statfile_pool;                   /**< use mlock (2) for locking statfiles				*/
 

src/libserver/cfg_rcl.c

@@ -1257,6 +1257,11 @@ rspamd_rcl_config_init (void)
 			rspamd_rcl_parse_struct_boolean,
 			G_STRUCT_OFFSET (struct rspamd_config, log_urls),
 			0);
+	rspamd_rcl_add_default_handler (sub,
+			"log_re_cache",
+			rspamd_rcl_parse_struct_boolean,
+			G_STRUCT_OFFSET (struct rspamd_config, log_re_cache),
+			0);
 	rspamd_rcl_add_default_handler (sub,
 			"debug_ip",
 			rspamd_rcl_parse_struct_string,

src/libserver/protocol.c

@@ -991,6 +991,7 @@ rspamd_protocol_http_reply (struct rspamd_http_message *msg,
 {
 	struct metric_result *metric_res;
 	GHashTableIter hiter;
+	const struct rspamd_re_cache_stat *restat;
 	gpointer h, v;
 	ucl_object_t *top = NULL;
 	gdouble required_score;
@@ -1012,6 +1013,18 @@ rspamd_protocol_http_reply (struct rspamd_http_message *msg,
 
 	rspamd_task_write_log (task);
 
+	if (task->cfg->log_re_cache) {
+		restat = rspamd_re_cache_get_stat (task->re_rt);
+		g_assert (restat != NULL);
+		msg_info_task (
+				"regexp statistics: %ud pcre regexps scanned, %ud regexps matched,"
+						" %HL bytes scanned using pcre, %HL bytes scanned total",
+				restat->regexp_checked,
+				restat->regexp_matched,
+				restat->bytes_scanned_pcre,
+				restat->bytes_scanned);
+	}
+
 	msg->body = rspamd_fstring_sized_new (1000);
 
 	if (msg->method < HTTP_SYMBOLS && !RSPAMD_TASK_IS_SPAMC (task)) {