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fix: no_std fix use without unwind #9977

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fix: no_std fix use without unwind #9977

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aaa3f0e
fix(cranelift): `no_std` fix use without `unwind`
JonasKruckenberg Jan 10, 2025
638d3d0
refactor: dont compute value labels ranges
JonasKruckenberg Jan 13, 2025
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1 change: 1 addition & 0 deletions cranelift/codegen/src/isa/pulley_shared/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -193,6 +193,7 @@ where
})
}

#[cfg(feature = "unwind")]
fn emit_unwind_info(
&self,
_result: &crate::CompiledCode,
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1 change: 1 addition & 0 deletions cranelift/codegen/src/isa/unwind.rs
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Expand Up @@ -15,6 +15,7 @@ pub mod winx64;
pub mod winarm64;

/// CFA-based unwind information used on SystemV.
#[cfg(feature = "unwind")]
pub type CfaUnwindInfo = systemv::UnwindInfo;

/// Expected unwind info type.
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2 changes: 2 additions & 0 deletions cranelift/codegen/src/isa/x64/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ mod lower;
mod pcc;
pub mod settings;

#[cfg(feature = "unwind")]
pub use inst::unwind::systemv::create_cie;

/// An X64 backend.
Expand Down Expand Up @@ -184,6 +185,7 @@ impl TargetIsa for X64Backend {
}

/// Emit unwind info for an x86 target.
#[cfg(feature = "unwind")]
pub fn emit_unwind_info(
buffer: &MachBufferFinalized<Final>,
kind: crate::isa::unwind::UnwindInfoKind,
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9 changes: 9 additions & 0 deletions cranelift/codegen/src/machinst/vcode.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1064,8 +1064,14 @@ impl<I: VCodeInst> VCode<I> {
}

self.monotonize_inst_offsets(&mut inst_offsets[..], func_body_len);

#[cfg(feature = "unwind")]
let value_labels_ranges =
self.compute_value_labels_ranges(regalloc, &inst_offsets[..], func_body_len);
// when unwind information is disabled, ValueLabelsRanges are meaningless anyway
#[cfg(not(feature = "unwind"))]
let value_labels_ranges = ValueLabelsRanges::default();

let frame_size = self.abi.frame_size();

EmitResult {
Expand Down Expand Up @@ -1121,6 +1127,7 @@ impl<I: VCodeInst> VCode<I> {
}
}

#[cfg(feature = "unwind")]
fn compute_value_labels_ranges(
&self,
regalloc: &regalloc2::Output,
Expand Down Expand Up @@ -1158,8 +1165,10 @@ impl<I: VCodeInst> VCode<I> {
let slot = alloc.as_stack().unwrap();
let slot_offset = self.abi.get_spillslot_offset(slot);
let slot_base_to_caller_sp_offset = self.abi.slot_base_to_caller_sp_offset();

let caller_sp_to_cfa_offset =
crate::isa::unwind::systemv::caller_sp_to_cfa_offset();

// NOTE: this is a negative offset because it's relative to the caller's SP
let cfa_to_sp_offset =
-((slot_base_to_caller_sp_offset + caller_sp_to_cfa_offset) as i64);
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