tests/pass/miri-alloc.rs

#![feature(lang_items, start)]
#![no_std]
// windows tls dtors go through libstd right now, thus this test
// cannot pass. When windows tls dtors go through the special magic
// windows linker section, we can run this test on windows again.
//@ignore-target-windows: no-std not supported on Windows

extern "Rust" {
    fn miri_alloc(size: usize, align: usize) -> *mut u8;
    fn miri_dealloc(ptr: *mut u8, size: usize, align: usize);
}

#[start]
fn start(_: isize, _: *const *const u8) -> isize {
    unsafe {
        let ptr = miri_alloc(123, 1);
        core::ptr::write_bytes(ptr, 0u8, 123);
        miri_dealloc(ptr, 123, 1);
    }
    0
}

#[panic_handler]
fn panic_handler(_: &core::panic::PanicInfo) -> ! {
    loop {}
}

#[lang = "eh_personality"]
fn eh_personality() {}