Rollup merge of rust-lang#141815 - mati865:mingw-aarch64-frame-pointers, r=workingjubilee

Enable non-leaf Frame Pointers for mingw-w64 Arm64 Windows

Based on rust-lang#140828

I don't have AArch64 Windows to test it, but I trust LLVM to handle it well.

Author: matthiaskrgr

compiler/rustc_target/src/spec/targets/aarch64_pc_windows_gnullvm.rs

@@ -1,11 +1,17 @@
-use crate::spec::{Target, TargetMetadata, base};
+use crate::spec::{FramePointer, Target, TargetMetadata, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::windows_gnullvm::opts();
     base.max_atomic_width = Some(128);
     base.features = "+v8a,+neon,+fp-armv8".into();
     base.linker = Some("aarch64-w64-mingw32-clang".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;
+
     Target {
         llvm_target: "aarch64-pc-windows-gnu".into(),
         metadata: TargetMetadata {