From 3acb70b8e14a0ce3f5169327407595aceab987d8 Mon Sep 17 00:00:00 2001
From: Dude so hot <djohn@fbi.gov>
Date: Sat, 14 Sep 2024 19:56:50 +0800
Subject: [PATCH] Add safety hint for deref_mut_direct_bytebuffer

Signed-off-by: Dude so hot <djohn@fbi.gov>
---
 app/src/main/rust/src/lib.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/rust/src/lib.rs b/app/src/main/rust/src/lib.rs
index b66df36c5..3c9ce52a5 100644
--- a/app/src/main/rust/src/lib.rs
+++ b/app/src/main/rust/src/lib.rs
@@ -60,6 +60,8 @@ where
 fn deref_mut_direct_bytebuffer(env: &JNIEnv, buffer: JByteBuffer) -> Result<&'static mut [u8]> {
     let ptr = env.get_direct_buffer_address(&buffer)?;
     let cap = env.get_direct_buffer_capacity(&buffer)?;
+
+    // SAFETY: jni contract, buffer must alive through native call.
     Ok(unsafe { &mut *slice_from_raw_parts_mut(ptr, cap) })
 }