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87 lines
2.6 KiB
Rust
87 lines
2.6 KiB
Rust
// run-pass
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// ignore-arm
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// ignore-aarch64
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// ignore-mips
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// ignore-mips64
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// ignore-sparc
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// ignore-sparc64
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// ignore-wasm
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// ignore-emscripten no processes
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// ignore-sgx no processes
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// ignore-fuchsia no exception handler registered for segfault
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// ignore-nto Crash analysis impossible at SIGSEGV in QNX Neutrino
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use std::env;
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use std::mem::MaybeUninit;
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use std::process::Command;
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use std::thread;
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#[link(name = "rust_test_helpers", kind = "static")]
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extern "C" {
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#[link_name = "rust_dbg_extern_identity_u64"]
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fn black_box(u: u64);
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}
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fn main() {
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let args = env::args().skip(1).collect::<Vec<_>>();
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if args.len() > 0 {
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match &args[0][..] {
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"main-recurse" => overflow_recurse(),
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"child-recurse" => thread::spawn(overflow_recurse).join().unwrap(),
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"child-frame" => overflow_frame(),
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_ => panic!(),
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}
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return;
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}
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let me = env::current_exe().unwrap();
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// The linux kernel has some different behavior for the main thread because
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// the main thread's stack can typically grow. We can't always guarantee
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// that we report stack overflow on the main thread, see #43052 for some
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// details
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if cfg!(not(target_os = "linux")) {
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assert_overflow(Command::new(&me).arg("main-recurse"));
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}
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assert_overflow(Command::new(&me).arg("child-recurse"));
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assert_overflow(Command::new(&me).arg("child-frame"));
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}
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#[allow(unconditional_recursion)]
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fn recurse(array: &MaybeUninit<[u64; 1024]>) {
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unsafe {
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black_box(array.as_ptr() as u64);
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}
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let local: MaybeUninit<[u64; 1024]> = MaybeUninit::uninit();
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recurse(&local);
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}
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#[inline(never)]
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fn overflow_recurse() {
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recurse(&MaybeUninit::uninit());
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}
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fn overflow_frame() {
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// By using a 1MiB stack frame with only 512KiB stack, we'll jump over any
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// guard page, even with 64K pages -- but stack probes should catch it.
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const STACK_SIZE: usize = 512 * 1024;
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thread::Builder::new().stack_size(STACK_SIZE).spawn(|| {
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let local: MaybeUninit<[u8; 2 * STACK_SIZE]> = MaybeUninit::uninit();
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unsafe {
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black_box(local.as_ptr() as u64);
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}
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}).unwrap().join().unwrap();
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}
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fn assert_overflow(cmd: &mut Command) {
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let output = cmd.output().unwrap();
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assert!(!output.status.success());
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let stdout = String::from_utf8_lossy(&output.stdout);
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let stderr = String::from_utf8_lossy(&output.stderr);
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println!("status: {}", output.status);
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println!("stdout: {}", stdout);
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println!("stderr: {}", stderr);
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assert!(stdout.is_empty());
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assert!(stderr.contains("has overflowed its stack\n"));
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}
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