Fix function signature for rust_eh_personality

While cg_llvm is very lax about mismatched function signatures, cg_clif
will crash when there is any mismatch. It could be turned into an error,
but without Cranelift changes can't just be ignored.

Author: bjorn3

tests/run-make/bin-emit-no-symbols/app.rs

@@ -12,7 +12,15 @@ fn panic(_: &PanicInfo) -> ! {
 }
 
 #[lang = "eh_personality"]
-fn eh() {}
+fn eh(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
+    loop {}
+}
 
 #[alloc_error_handler]
 fn oom(_: Layout) -> ! {

tests/run-make/crate-circular-deps-link/a.rs

@@ -21,6 +21,12 @@ extern "C" fn __rust_foreign_exception() -> ! {
 }
 
 #[lang = "eh_personality"]
-fn eh_personality() {
+fn eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
     loop {}
 }

tests/run-make/no-alloc-shim/foo.rs

@@ -12,7 +12,13 @@ fn panic_handler(_: &core::panic::PanicInfo) -> ! {
 }
 
 #[no_mangle]
-extern "C" fn rust_eh_personality() {
+extern "C" fn rust_eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
     loop {}
 }
 

tests/ui/allocator/no_std-alloc-error-handler-custom.rs

@@ -70,7 +70,15 @@ fn panic(panic_info: &core::panic::PanicInfo) -> ! {
 // in these libraries will refer to `rust_eh_personality` if LLVM can not *prove* the contents won't
 // unwind. So, for this test case we will define the symbol.
 #[lang = "eh_personality"]
-extern "C" fn rust_eh_personality() {}
+extern "C" fn rust_eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
+    loop {}
+}
 
 #[derive(Default, Debug)]
 struct Page(#[allow(dead_code)] [[u64; 32]; 16]);

tests/ui/allocator/no_std-alloc-error-handler-default.rs

@@ -57,7 +57,15 @@ fn panic(panic_info: &core::panic::PanicInfo) -> ! {
 // in these libraries will refer to `rust_eh_personality` if LLVM can not *prove* the contents won't
 // unwind. So, for this test case we will define the symbol.
 #[lang = "eh_personality"]
-extern "C" fn rust_eh_personality() {}
+extern "C" fn rust_eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
+    loop {}
+}
 
 #[derive(Default, Debug)]
 struct Page(#[allow(dead_code)] [[u64; 32]; 16]);

tests/ui/extern-flag/auxiliary/panic_handler.rs

@@ -12,4 +12,12 @@ pub fn begin_panic_handler(_info: &core::panic::PanicInfo<'_>) -> ! {
 }
 
 #[lang = "eh_personality"]
-extern "C" fn eh_personality() {}
+extern "C" fn eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
+    loop {}
+}

tests/ui/panic-runtime/incompatible-type.rs

@@ -21,4 +21,12 @@ pub fn test(_: DropMe) {
 }
 
 #[rustc_std_internal_symbol]
-pub unsafe extern "C" fn rust_eh_personality() {}
+pub unsafe extern "C" fn rust_eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
+    loop {}
+}