1 files changed, 12 insertions, 0 deletions
diff --git a/yjit/src/asm/mod.rs b/yjit/src/asm/mod.rs
index 9f518398b7..b54fc362b4 100644
--- a/yjit/src/asm/mod.rs
+++ b/yjit/src/asm/mod.rs
@@ -1,3 +1,4 @@
+use std::fmt;
 use std::mem;
 
 #[cfg(feature = "asm_comments")]
@@ -276,6 +277,17 @@ impl CodeBlock {
     }
 }
 
+/// Produce hex string output from the bytes in a code block
+impl<'a> fmt::LowerHex for CodeBlock {
+    fn fmt(&self, fmtr: &mut fmt::Formatter) -> fmt::Result {
+        for pos in 0..self.write_pos {
+            let byte = unsafe { self.mem_block.start_ptr().raw_ptr().add(pos).read() };
+            fmtr.write_fmt(format_args!("{:02x}", byte))?;
+        }
+        Ok(())
+    }
+}
+
 /// Wrapper struct so we can use the type system to distinguish
 /// Between the inlined and outlined code blocks
 pub struct OutlinedCb {