ef90d32f07
This commit alters the translation layer to unconditionally emit the `uwtable` LLVM attribute on Windows regardless of the `no_landing_pads` setting. Previously I believe we omitted this attribute as an optimization when the `-Cpanic=abort` flag was passed, but this unfortunately caused problems for Gecko. It [was discovered] that there was trouble unwinding through Rust functions due to foreign exceptions such as illegal instructions or otherwise in-practice methods used to abort a process. In testing it looked like the major difference between a working binary and a non-working binary is indeed this `uwtable` attribute, but this PR has unfortunately not been thoroughly tested in terms of compiling Gecko with `-C panic=abort` *and* this PR to see whether it works, so this is still somewhat working on just suspicion. [was discovered]: https://bugzilla.mozilla.org/show_bug.cgi?id=1302078
41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-tidy-linelength
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// This test is for *-windows-msvc only.
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// ignore-android
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// ignore-bitrig
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// ignore-macos
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// ignore-dragonfly
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// ignore-freebsd
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// ignore-haiku
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// ignore-ios
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// ignore-linux
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// ignore-netbsd
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// ignore-openbsd
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// ignore-solaris
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// ignore-emscripten
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// compile-flags: -C no-prepopulate-passes -C panic=abort -O
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#![crate_type = "lib"]
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// CHECK: Function Attrs: uwtable
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// CHECK-NEXT: define void @normal_uwtable()
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#[no_mangle]
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pub fn normal_uwtable() {
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}
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// CHECK: Function Attrs: nounwind uwtable
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// CHECK-NEXT: define void @extern_uwtable()
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#[no_mangle]
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pub extern fn extern_uwtable() {
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}
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