From 004d85fbd05a78be1f9c594b04dfb6ea1eb0ea23 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 8 Mar 2021 23:45:37 +0000
Subject: [PATCH] utils: provide trace_dbg

No callers yet

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/prelude.rs |  1 +
 src/utils.rs   | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/prelude.rs b/src/prelude.rs
index ed86ff6f..05636ebe 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -101,6 +101,7 @@ pub use crate::dbgc;
 pub use crate::{deref_to_field, deref_to_field_mut};
 pub use crate::ensure_eq;
 pub use crate::from_instance_lock_error;
+pub use crate::trace_dbg;
 
 pub use crate::accounts::loaded_acl::{self, EffectiveACL, LoadedAcl, PermSet};
 pub use crate::accounts::*;
diff --git a/src/utils.rs b/src/utils.rs
index c264c738..524671bf 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -388,3 +388,16 @@ macro_rules! dbgc {
         ($($crate::dbgc!($val)),+,)
     };
 }
+
+#[macro_export]
+macro_rules! trace_dbg {
+  ($msg:expr $(,$val:expr)*) => {
+    use log::*;
+    use Level::*;
+    if log_enabled!(Trace) {
+      let mut buf = format!("{}", &$msg);
+      $( write!(&mut buf, " {}={:?}", stringify!($val), &$val).unwrap(); )*
+      trace!("{}", buf);
+    }
+  }
+}
-- 
2.30.2