49 lines
1.3 KiB
Rust
49 lines
1.3 KiB
Rust
//@ add-core-stubs
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//@ revisions: aarch64 x86_64
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//@ [aarch64] compile-flags: --target aarch64-unknown-none
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//@ [aarch64] needs-llvm-components: aarch64
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//@ [x86_64] compile-flags: --target x86_64-unknown-none
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//@ [x86_64] needs-llvm-components: x86
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//@ compile-flags: -Ctarget-feature=-crt-static -Zsanitizer=kcfi -Cno-prepopulate-passes -Copt-level=0
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#![feature(no_core, lang_items)]
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#![crate_type = "lib"]
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#![no_core]
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extern crate minicore;
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use minicore::*;
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struct Thing;
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trait MyTrait {
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// NOTE: this test assumes that this trait is dyn-compatible.
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#[unsafe(naked)]
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extern "C" fn my_naked_function(&self) {
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// the real function is defined
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// CHECK: .globl
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// CHECK-SAME: my_naked_function
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naked_asm!("ret")
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}
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}
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impl MyTrait for Thing {}
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// the shim calls the real function
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// CHECK-LABEL: define
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// CHECK-SAME: my_naked_function
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// CHECK-SAME: reify.shim.fnptr
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// CHECK-LABEL: main
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#[unsafe(no_mangle)]
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pub fn main() {
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// Trick the compiler into generating an indirect call.
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const F: extern "C" fn(&Thing) = Thing::my_naked_function;
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// main calls the shim function
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// CHECK: call void
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// CHECK-SAME: my_naked_function
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// CHECK-SAME: reify.shim.fnptr
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(F)(&Thing);
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}
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// CHECK: declare !kcfi_type
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// CHECK-SAME: my_naked_function
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