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29967ef6 XL |
1 | // run-pass |
2 | // ignore-android no libc | |
29967ef6 XL |
3 | // ignore-emscripten no libc |
4 | // ignore-sgx no libc | |
5 | // ignore-wasm32 no libc | |
6 | // only-linux | |
7 | // compile-flags:-C panic=abort | |
8 | // aux-build:helper.rs | |
9 | ||
6a06907d | 10 | #![feature(start, rustc_private, new_uninit, panic_info_message, lang_items)] |
29967ef6 XL |
11 | #![feature(alloc_error_handler)] |
12 | #![no_std] | |
13 | ||
14 | extern crate alloc; | |
15 | extern crate libc; | |
16 | ||
17 | // ARM targets need these symbols | |
18 | #[no_mangle] | |
19 | pub fn __aeabi_unwind_cpp_pr0() {} | |
20 | ||
21 | #[no_mangle] | |
22 | pub fn __aeabi_unwind_cpp_pr1() {} | |
23 | ||
24 | use core::ptr::null_mut; | |
25 | use core::alloc::{GlobalAlloc, Layout}; | |
26 | use alloc::boxed::Box; | |
27 | ||
28 | extern crate helper; | |
29 | ||
30 | struct MyAllocator; | |
31 | ||
32 | #[alloc_error_handler] | |
33 | fn my_oom(layout: Layout) -> ! | |
34 | { | |
35 | use alloc::fmt::write; | |
36 | unsafe { | |
37 | let size = layout.size(); | |
38 | let mut s = alloc::string::String::new(); | |
39 | write(&mut s, format_args!("My OOM: failed to allocate {} bytes!\n", size)).unwrap(); | |
40 | let s = s.as_str(); | |
41 | libc::write(libc::STDERR_FILENO, s as *const _ as _, s.len()); | |
42 | libc::exit(0) | |
43 | } | |
44 | } | |
45 | ||
46 | unsafe impl GlobalAlloc for MyAllocator { | |
47 | unsafe fn alloc(&self, layout: Layout) -> *mut u8 { | |
48 | if layout.size() < 4096 { | |
49 | libc::malloc(layout.size()) as _ | |
50 | } else { | |
51 | null_mut() | |
52 | } | |
53 | } | |
54 | unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {} | |
55 | } | |
56 | ||
57 | #[global_allocator] | |
58 | static A: MyAllocator = MyAllocator; | |
59 | ||
60 | #[panic_handler] | |
61 | fn panic(panic_info: &core::panic::PanicInfo) -> ! { | |
62 | unsafe { | |
63 | if let Some(s) = panic_info.payload().downcast_ref::<&str>() { | |
64 | const PSTR: &str = "panic occurred: "; | |
65 | const CR: &str = "\n"; | |
66 | libc::write(libc::STDERR_FILENO, PSTR as *const _ as _, PSTR.len()); | |
67 | libc::write(libc::STDERR_FILENO, s as *const _ as _, s.len()); | |
68 | libc::write(libc::STDERR_FILENO, CR as *const _ as _, CR.len()); | |
69 | } | |
70 | if let Some(args) = panic_info.message() { | |
71 | let mut s = alloc::string::String::new(); | |
72 | alloc::fmt::write(&mut s, *args).unwrap(); | |
73 | let s = s.as_str(); | |
74 | const PSTR: &str = "panic occurred: "; | |
75 | const CR: &str = "\n"; | |
76 | libc::write(libc::STDERR_FILENO, PSTR as *const _ as _, PSTR.len()); | |
77 | libc::write(libc::STDERR_FILENO, s as *const _ as _, s.len()); | |
78 | libc::write(libc::STDERR_FILENO, CR as *const _ as _, CR.len()); | |
79 | } else { | |
80 | const PSTR: &str = "panic occurred\n"; | |
81 | libc::write(libc::STDERR_FILENO, PSTR as *const _ as _, PSTR.len()); | |
82 | } | |
83 | libc::exit(1) | |
84 | } | |
85 | } | |
86 | ||
6a06907d XL |
87 | // Because we are compiling this code with `-C panic=abort`, this wouldn't normally be needed. |
88 | // However, `core` and `alloc` are both compiled with `-C panic=unwind`, which means that functions | |
89 | // in these libaries will refer to `rust_eh_personality` if LLVM can not *prove* the contents won't | |
90 | // unwind. So, for this test case we will define the symbol. | |
91 | #[lang = "eh_personality"] | |
92 | extern fn rust_eh_personality() {} | |
93 | ||
29967ef6 XL |
94 | #[derive(Debug)] |
95 | struct Page([[u64; 32]; 16]); | |
96 | ||
97 | #[start] | |
98 | pub fn main(_argc: isize, _argv: *const *const u8) -> isize { | |
99 | let zero = Box::<Page>::new_zeroed(); | |
100 | let zero = unsafe { zero.assume_init() }; | |
101 | helper::work_with(&zero); | |
102 | 1 | |
103 | } |