Log if a (non root) component calls getUserIdentity (#36030)

GitOrigin-RevId: 52c7eb4326b4e325a9fca3cb0ba008a10358babd

Author: goffrie

crates/isolate/src/environment/udf/async_syscall.rs

@@ -113,6 +113,7 @@ use crate::{
     isolate2::client::QueryId,
     metrics::{
         async_syscall_timer,
+        log_component_get_user_identity,
         log_run_udf,
     },
 };
@@ -773,6 +774,9 @@ impl<RT: Runtime, P: AsyncSyscallProvider<RT>> DatabaseSyscallsV1<RT, P> {
         // TODO: Somehow make the Transaction aware of the dependency on the user.
         let tx = provider.tx()?;
         let user_identity = tx.user_identity();
+        if !provider.component()?.is_root() {
+            log_component_get_user_identity(user_identity.is_some());
+        }
         if let Some(user_identity) = user_identity {
             return user_identity.try_into();
         }

crates/isolate/src/metrics.rs

@@ -696,3 +696,20 @@ pub fn log_run_udf(
         ],
     );
 }
+
+register_convex_counter!(
+    COMPONENT_GET_USER_IDENTITY_TOTAL,
+    "Number of times that components call getUserIdentity()",
+    &["has_user_identity"]
+);
+
+pub fn log_component_get_user_identity(has_user_identity: bool) {
+    log_counter_with_labels(
+        &COMPONENT_GET_USER_IDENTITY_TOTAL,
+        1,
+        vec![StaticMetricLabel::new(
+            "has_user_identity",
+            has_user_identity.as_label(),
+        )],
+    );
+}