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rust/tests/codegen/panic-abort-windows.rs

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Ignore `gnu` systems (`windows-msvc` only)
2022-12-01 21:12:55 +08:00
// This test is for *-windows only.
Run Windows-only tests only on Windows This removes the need to maintain a list of all other OSs which ignore the tests.
2022-11-28 15:11:19 +08:00
//@ only-windows
rustc: Always emit the `uwtable` attribute on Windows 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
2017-03-15 23:09:59 +08:00
//@ compile-flags: -C no-prepopulate-passes -C panic=abort -O
#![crate_type = "lib"]
rustc: Add LLVM `nounwind` with `-C panic=abort` This informs LLVM that functions can't unwind, which while it should typically have already been inferred when necessary or otherwise not impact codegen is apparently needed on targets like ARM to avoid references to unnecessary symbols. Closes #44992
2017-10-05 05:54:28 +08:00
// CHECK: Function Attrs: nounwind uwtable
rustc: Always emit the `uwtable` attribute on Windows 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
2017-03-15 23:09:59 +08:00
// CHECK-NEXT: define void @normal_uwtable()
#[no_mangle]
Run rustfmt on `tests/codegen/`. Except for `simd-intrinsic/`, which has a lot of files containing multiple types like `u8x64` which really are better when hand-formatted. There is a surprising amount of two-space indenting in this directory. Non-trivial changes: - `rustfmt::skip` needed in `debug-column.rs` to preserve meaning of the test. - `rustfmt::skip` used in a few places where hand-formatting read more nicely: `enum/enum-match.rs` - Line number adjustments needed for the expected output of `debug-column.rs` and `coroutine-debug.rs`.
2024-05-29 12:11:20 +08:00
pub fn normal_uwtable() {}
rustc: Always emit the `uwtable` attribute on Windows 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
2017-03-15 23:09:59 +08:00
// CHECK: Function Attrs: nounwind uwtable
// CHECK-NEXT: define void @extern_uwtable()
#[no_mangle]
Run rustfmt on `tests/codegen/`. Except for `simd-intrinsic/`, which has a lot of files containing multiple types like `u8x64` which really are better when hand-formatted. There is a surprising amount of two-space indenting in this directory. Non-trivial changes: - `rustfmt::skip` needed in `debug-column.rs` to preserve meaning of the test. - `rustfmt::skip` used in a few places where hand-formatting read more nicely: `enum/enum-match.rs` - Line number adjustments needed for the expected output of `debug-column.rs` and `coroutine-debug.rs`.
2024-05-29 12:11:20 +08:00
pub extern "C" fn extern_uwtable() {}