mirror of https://github.com/rust-lang/rust
71 lines
2.0 KiB
Rust
71 lines
2.0 KiB
Rust
//@ run-pass
|
|
//@ ignore-android no libc
|
|
//@ ignore-emscripten no libc
|
|
//@ ignore-sgx no libc
|
|
//@ only-linux
|
|
//@ compile-flags:-C panic=abort
|
|
//@ aux-build:helper.rs
|
|
|
|
#![feature(rustc_private, lang_items)]
|
|
#![no_std]
|
|
#![no_main]
|
|
|
|
extern crate alloc;
|
|
extern crate libc;
|
|
|
|
// ARM targets need these symbols
|
|
#[no_mangle]
|
|
pub fn __aeabi_unwind_cpp_pr0() {}
|
|
|
|
#[no_mangle]
|
|
pub fn __aeabi_unwind_cpp_pr1() {}
|
|
|
|
use alloc::boxed::Box;
|
|
use alloc::string::ToString;
|
|
use core::alloc::{GlobalAlloc, Layout};
|
|
use core::ptr::null_mut;
|
|
|
|
extern crate helper;
|
|
|
|
struct MyAllocator;
|
|
|
|
unsafe impl GlobalAlloc for MyAllocator {
|
|
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
|
|
if layout.size() < 4096 { libc::malloc(layout.size()) as _ } else { null_mut() }
|
|
}
|
|
unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {}
|
|
}
|
|
|
|
#[global_allocator]
|
|
static A: MyAllocator = MyAllocator;
|
|
|
|
#[panic_handler]
|
|
fn panic(panic_info: &core::panic::PanicInfo) -> ! {
|
|
unsafe {
|
|
let s = panic_info.to_string();
|
|
const PSTR: &str = "panic occurred: ";
|
|
const CR: &str = "\n";
|
|
libc::write(libc::STDERR_FILENO, PSTR.as_ptr() as *const _, PSTR.len());
|
|
libc::write(libc::STDERR_FILENO, s.as_ptr() as *const _, s.len());
|
|
libc::write(libc::STDERR_FILENO, CR.as_ptr() as *const _, CR.len());
|
|
libc::exit(0)
|
|
}
|
|
}
|
|
|
|
// Because we are compiling this code with `-C panic=abort`, this wouldn't normally be needed.
|
|
// However, `core` and `alloc` are both compiled with `-C panic=unwind`, which means that functions
|
|
// 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() {}
|
|
|
|
#[derive(Default, Debug)]
|
|
struct Page(#[allow(dead_code)] [[u64; 32]; 16]);
|
|
|
|
#[no_mangle]
|
|
fn main(_argc: i32, _argv: *const *const u8) -> isize {
|
|
let zero = Box::<Page>::new(Default::default());
|
|
helper::work_with(&zero);
|
|
1
|
|
}
|