src/test/ui/asm/x86_64/may_unwind.rs

   1 // min-llvm-version: 13.0.0
   2 // only-x86_64
   3 // run-pass
   4 // needs-asm-support
   5
   6 #![feature(asm_sym, asm_unwind)]
   7
   8 use std::arch::asm;
   9 use std::panic::{catch_unwind, resume_unwind, AssertUnwindSafe};
  10
  11 struct Foo<'a>(&'a mut bool);
  12
  13 impl Drop for Foo<'_> {
  14     fn drop(&mut self) {
  15         *self.0 = false;
  16     }
  17 }
  18
  19 extern "C" fn panicky() {
  20     resume_unwind(Box::new(()));
  21 }
  22
  23 fn main() {
  24     let flag = &mut true;
  25     catch_unwind(AssertUnwindSafe(|| {
  26         let _foo = Foo(flag);
  27         unsafe {
  28             asm!(
  29                 "call {}",
  30                 sym panicky,
  31                 clobber_abi("C"),
  32                 options(may_unwind)
  33             );
  34         }
  35     }))
  36     .expect_err("expected a panic");
  37     assert_eq!(*flag, false);
  38 }