user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Enable non-leaf Frame Pointers for Arm64 Windows

Browse source
This commit is contained in:
Daniel Paoliello 2025-05-08 13:08:31 -07:00
parent fe348cd1a8
commit d951c41a68
1 changed files with 7 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

8
compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs
View file

@ -1,10 +1,16 @@
use crate::spec::{LinkerFlavor, Lld, Target, TargetMetadata, base};
use crate::spec::{FramePointer, LinkerFlavor, Lld, Target, TargetMetadata, base};
pub(crate) fn target() -> Target {
let mut base = base::windows_msvc::opts();
base.max_atomic_width = Some(128);
base.features = "+v8a,+neon,+fp-armv8".into();
// Microsoft recommends enabling frame pointers on Arm64 Windows.
// From https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#integer-registers
// "The frame pointer (x29) is required for compatibility with fast stack walking used by ETW
// and other services. It must point to the previous {x29, x30} pair on the stack."
base.frame_pointer = FramePointer::NonLeaf;
// MSVC emits a warning about code that may trip "Cortex-A53 MPCore processor bug #843419" (see
// https://developer.arm.com/documentation/epm048406/latest) which is sometimes emitted by LLVM.
// Since Arm64 Windows 10+ isn't supported on that processor, it's safe to disable the warning.