1 files changed, 21 insertions, 0 deletions
diff --git a/fuzz/fuzz_targets/fresh-decode.rs b/fuzz/fuzz_targets/fresh-decode.rs
new file mode 100644
index 0000000..76a402e
--- /dev/null
+++ b/fuzz/fuzz_targets/fresh-decode.rs
@@ -0,0 +1,21 @@
+//! decoding into a pre-existing instruction should not result in different outcomes compared to
+//! decoding into a fresh instruction. if decoding succeeds, both outcomes should be equal.
+
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+
+use yaxpeax_arch::Decoder;
+
+fuzz_target!(|data: &[u8]| {
+    let decoder = yaxpeax_hexagon::InstDecoder::default();
+
+    let mut reused_inst = yaxpeax_hexagon::InstructionPacket::default();
+
+    let mut words = yaxpeax_arch::U8Reader::new(data);
+    // test decoding, may be ok or not, but should not panic
+    if let Ok(()) = decoder.decode_into(&mut reused_inst, &mut words) {
+        let mut words = yaxpeax_arch::U8Reader::new(data);
+        let fresh_inst = decoder.decode(&mut words).expect("decoded before, can decode again");
+        assert_eq!(reused_inst, fresh_inst);
+    }
+});