src/test/run-pass/sepcomp-unwind.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // ignore-bitrig
  12 // compile-flags: -C codegen-units=3
  13 // ignore-emscripten no threads support
  14
  15 // Test unwinding through multiple compilation units.
  16
  17 // According to acrichto, in the distant past `ld -r` (which is used during
  18 // linking when codegen-units > 1) was known to produce object files with
  19 // damaged unwinding tables.  This may be related to GNU binutils bug #6893
  20 // ("Partial linking results in corrupt .eh_frame_hdr"), but I'm not certain.
  21 // In any case, this test should let us know if enabling parallel codegen ever
  22 // breaks unwinding.
  23
  24
  25 use std::thread;
  26
  27 fn pad() -> usize { 0 }
  28
  29 mod a {
  30     pub fn f() {
  31         panic!();
  32     }
  33 }
  34
  35 mod b {
  36     pub fn g() {
  37         ::a::f();
  38     }
  39 }
  40
  41 fn main() {
  42     thread::spawn(move|| { ::b::g() }).join().err().unwrap();
  43 }