mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-22 23:04:33 +00:00
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
|
// revisions: x86_64 i686
|
||
|
|
// assembly-output: emit-asm
|
||
|
|
//[x86_64] compile-flags: --target x86_64-unknown-linux-gnu
|
||
|
|
//[x86_64] needs-llvm-components: x86
|
||
|
|
//[i686] compile-flags: --target i686-unknown-linux-gnu
|
||
|
|
//[i686] needs-llvm-components: x86
|
||
|
|
// compile-flags: -C llvm-args=-x86-asm-syntax=intel
|
||
|
|
|
||
|
|
#![feature(no_core, lang_items)]
|
||
|
|
#![crate_type = "lib"]
|
||
|
|
#![no_core]
|
||
|
|
|
||
|
|
#[lang = "sized"]
|
||
|
|
trait Sized {}
|
||
|
|
#[lang = "copy"]
|
||
|
|
trait Copy {}
|
||
|
|
|
||
|
|
impl Copy for u8 {}
|
||
|
|
|
||
|
|
// Check that inline-asm stack probes are generated correctly.
|
||
|
|
// To avoid making this test fragile to slight asm changes,
|
||
|
|
// we only check that the stack pointer is decremented by a page at a time,
|
||
|
|
// instead of matching the whole probe sequence.
|
||
|
|
|
||
|
|
// CHECK-LABEL: small_stack_probe:
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn small_stack_probe(x: u8, f: fn(&mut [u8; 8192])) {
|
||
|
|
// CHECK-NOT: __rust_probestack
|
||
|
|
// x86_64: sub rsp, 4096
|
||
|
|
// i686: sub esp, 4096
|
||
|
|
f(&mut [x; 8192]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: big_stack_probe:
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn big_stack_probe(x: u8, f: fn(&[u8; 65536])) {
|
||
|
|
// CHECK-NOT: __rust_probestack
|
||
|
|
// x86_64: sub rsp, 4096
|
||
|
|
// i686: sub esp, 4096
|
||
|
|
f(&mut [x; 65536]);
|
||
|
|
}
|