X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-filter-interpreter.c;h=690ebde9eece5e1dbb4695e067f014d895bf8a73;hb=8a92ed2aba5250d41e31d1af5620a2317105c91a;hp=e6e96dbff9a9bf53cdb346b68cd63a9b4728d457;hpb=a543151c94023ca7c694cb89c4d9cecceda775dd;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-filter-interpreter.c b/liblttng-ust/lttng-filter-interpreter.c
index e6e96dbf..690ebde9 100644
--- a/liblttng-ust/lttng-filter-interpreter.c
+++ b/liblttng-ust/lttng-filter-interpreter.c
@@ -105,7 +105,7 @@ int stack_strcmp(struct estack *stack, int top, const char *cmp_type)
 	return diff;
 }
 
-int lttng_filter_false(void *filter_data,
+uint64_t lttng_filter_false(void *filter_data,
 		const char *filter_stack_data)
 {
 	return 0;
@@ -157,7 +157,12 @@ LABEL_##name
 
 #endif
 
-int lttng_filter_interpret_bytecode(void *filter_data,
+/*
+ * Return 0 (discard), or raise the 0x1 flag (log event).
+ * Currently, other flags are kept for future extensions and have no
+ * effect.
+ */
+uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		const char *filter_stack_data)
 {
 	struct bytecode_runtime *bytecode = filter_data;
@@ -279,6 +284,7 @@ int lttng_filter_interpret_bytecode(void *filter_data,
 			goto end;
 
 		OP(FILTER_OP_RETURN):
+			/* LTTNG_FILTER_DISCARD  or LTTNG_FILTER_RECORD_FLAG */
 			retval = !!estack_ax_v;
 			ret = 0;
 			goto end;