#![feature(raw)]
#![panic_runtime]
#![feature(panic_runtime)]
+// `real_imp` is unused with Miri, so silence warnings.
+#![cfg_attr(miri, allow(dead_code))]
use alloc::boxed::Box;
use core::any::Any;
use core::panic::BoxMeUp;
-// If adding to this list, you should also look at the list of TryPayload types
-// defined in payload.rs and likely add to there as well.
cfg_if::cfg_if! {
if #[cfg(target_os = "emscripten")] {
#[path = "emcc.rs"]
- mod imp;
+ mod real_imp;
} else if #[cfg(target_arch = "wasm32")] {
#[path = "dummy.rs"]
- mod imp;
+ mod real_imp;
} else if #[cfg(target_os = "hermit")] {
#[path = "hermit.rs"]
- mod imp;
- } else if #[cfg(all(target_env = "msvc", target_arch = "aarch64"))] {
- #[path = "dummy.rs"]
- mod imp;
+ mod real_imp;
} else if #[cfg(target_env = "msvc")] {
#[path = "seh.rs"]
- mod imp;
+ mod real_imp;
} else {
// Rust runtime's startup objects depend on these symbols, so make them public.
#[cfg(all(target_os="windows", target_arch = "x86", target_env="gnu"))]
- pub use imp::eh_frame_registry::*;
+ pub use real_imp::eh_frame_registry::*;
#[path = "gcc.rs"]
- mod imp;
+ mod real_imp;
}
}
-include!("payload.rs");
+cfg_if::cfg_if! {
+ if #[cfg(miri)] {
+ // Use the Miri runtime.
+ // We still need to also load the normal runtime above, as rustc expects certain lang
+ // items from there to be defined.
+ #[path = "miri.rs"]
+ mod imp;
+ } else {
+ // Use the real runtime.
+ use real_imp as imp;
+ }
+}
extern "C" {
/// Handler in libstd called when a panic object is dropped outside of
mod dwarf;
-#[no_mangle]
-pub unsafe extern "C" fn __rust_panic_cleanup(
- payload: TryPayload,
-) -> *mut (dyn Any + Send + 'static) {
+#[rustc_std_internal_symbol]
+#[cfg_attr(not(bootstrap), allow(improper_ctypes_definitions))]
+pub unsafe extern "C" fn __rust_panic_cleanup(payload: *mut u8) -> *mut (dyn Any + Send + 'static) {
Box::into_raw(imp::cleanup(payload))
}
// Entry point for raising an exception, just delegates to the platform-specific
// implementation.
-#[no_mangle]
+#[rustc_std_internal_symbol]
#[unwind(allowed)]
pub unsafe extern "C" fn __rust_start_panic(payload: usize) -> u32 {
let payload = payload as *mut &mut dyn BoxMeUp;
let payload = (*payload).take_box();
- // Miri panic support: cfg'd out of normal builds just to be sure.
- // When going through normal codegen, `miri_start_panic` is a NOP, so the
- // Miri-enabled sysroot still supports normal unwinding. But when executed in
- // Miri, this line initiates unwinding.
- #[cfg(miri)]
- core::intrinsics::miri_start_panic(payload);
-
imp::panic(Box::from_raw(payload))
}