Explicitly send function commands to monitor (#11510)

Both functions and eval are marked as "no-monitor", since we want to explicitly feed in the script command before the commands generated by the script. Note that we want this behavior generally, so that commands can redact arguments before being added to the monitor.

(cherry picked from commit d136bf28307ed2add5a0b709586433f4cffd70a7)

2 files changed, 16 insertions, 0 deletions

diff --git a/src/functions.c b/src/functions.c
index 1e81bf6bc..9a2a5fc2e 100644
--- a/src/functions.c
+++ b/src/functions.c
@@ -616,6 +616,9 @@ uint64_t fcallGetCommandFlags(client *c, uint64_t cmd_flags) {
 }
 
 static void fcallCommandGeneric(client *c, int ro) {
+    /* Functions need to be fed to monitors before the commands they execute. */
+    replicationFeedMonitors(c,server.monitors,c->db->id,c->argv,c->argc);
+
     robj *function_name = c->argv[1];
     functionInfo *fi = dictFetchValue(curr_functions_lib_ctx->functions, function_name->ptr);
     if (!fi) {
diff --git a/tests/unit/introspection.tcl b/tests/unit/introspection.tcl
index 73f1649a7..9c149bfd8 100644
--- a/tests/unit/introspection.tcl
+++ b/tests/unit/introspection.tcl
@@ -77,6 +77,19 @@ start_server {tags {"introspection"}} {
         $rd close
     }
 
+    test {MONITOR can log commands issued by functions} {
+        r function load replace {#!lua name=test
+            redis.register_function('test', function() return redis.call('set', 'foo', 'bar') end)
+        }
+        set rd [redis_deferring_client]
+        $rd monitor
+        $rd read ;# Discard the OK
+        r fcall test 0
+        assert_match {*fcall*test*} [$rd read]
+        assert_match {*lua*"set"*"foo"*"bar"*} [$rd read]
+        $rd close
+    }
+
     test {MONITOR supports redacting command arguments} {
         set rd [redis_deferring_client]
         $rd monitor