miri: rename miri_start_panic → miri_start_unwind

Author: RalfJung

panic_unwind/src/miri.rs

@@ -8,14 +8,14 @@ type Payload = Box<Box<dyn Any + Send>>;
 
 extern "Rust" {
     /// Miri-provided extern function to begin unwinding.
-    fn miri_start_panic(payload: *mut u8) -> !;
+    fn miri_start_unwind(payload: *mut u8) -> !;
 }
 
 pub unsafe fn panic(payload: Box<dyn Any + Send>) -> u32 {
-    // The payload we pass to `miri_start_panic` will be exactly the argument we get
+    // The payload we pass to `miri_start_unwind` will be exactly the argument we get
     // in `cleanup` below. So we just box it up once, to get something pointer-sized.
     let payload_box: Payload = Box::new(payload);
-    miri_start_panic(Box::into_raw(payload_box) as *mut u8)
+    miri_start_unwind(Box::into_raw(payload_box) as *mut u8)
 }
 
 pub unsafe fn cleanup(payload_box: *mut u8) -> Box<dyn Any + Send> {