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| author | John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> | 2019-06-16 02:53:33 +0200 |
|---|---|---|
| committer | John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> | 2019-06-16 02:53:33 +0200 |
| commit | 3fa7411050e5f712c28b6e97346e9da3833407bb (patch) | |
| tree | d5d2ad952bced945c0c7a88530a69b6d7f2a6fc9 /src/librustc_codegen_llvm | |
| parent | 0dc9e9c10ca6dc78cba8b9f9b15038c977b10a77 (diff) | |
| download | rust-3fa7411050e5f712c28b6e97346e9da3833407bb.tar.gz rust-3fa7411050e5f712c28b6e97346e9da3833407bb.zip | |
librustc_codegen_llvm: Use repr(transparent) for bitflags over repr(C) (#61306)
In order to make sure that Rust's bitflags types are passed the same way in the Rust ABI as they are in the C ABI, we need to use the attribute repr(transparent) over the repr(C) attribute for the single-field bitflags structs in in order to prevent ABI mismatches. Thanks to Michael Karcher for finding this bug.
Diffstat (limited to 'src/librustc_codegen_llvm')
| -rw-r--r-- | src/librustc_codegen_llvm/llvm/ffi.rs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/librustc_codegen_llvm/llvm/ffi.rs b/src/librustc_codegen_llvm/llvm/ffi.rs index a71243c7c82..a5c295cd452 100644 --- a/src/librustc_codegen_llvm/llvm/ffi.rs +++ b/src/librustc_codegen_llvm/llvm/ffi.rs @@ -564,7 +564,7 @@ pub mod debuginfo { // These values **must** match with LLVMRustDIFlags!! bitflags! { - #[repr(C)] + #[repr(transparent)] #[derive(Default)] pub struct DIFlags: ::libc::uint32_t { const FlagZero = 0; @@ -593,7 +593,7 @@ pub mod debuginfo { // These values **must** match with LLVMRustDISPFlags!! bitflags! { - #[repr(C)] + #[repr(transparent)] #[derive(Default)] pub struct DISPFlags: ::libc::uint32_t { const SPFlagZero = 0; |