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A MIR transform that checks pointers are aligned

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This commit is contained in:
Ben Kimock 2022-11-10 11:37:28 -05:00
parent e216300876
commit 8ccf53332e
34 changed files with 360 additions and 20 deletions
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7
compiler/rustc_codegen_ssa/src/mir/block.rs
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@ -600,6 +600,13 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
// and `#[track_caller]` adds an implicit third argument.
(LangItem::PanicBoundsCheck, vec![index, len, location])
}
AssertKind::MisalignedPointerDereference { ref required, ref found } => {
let required = self.codegen_operand(bx, required).immediate();
let found = self.codegen_operand(bx, found).immediate();
// It's `fn panic_bounds_check(index: usize, len: usize)`,
// and `#[track_caller]` adds an implicit third argument.
(LangItem::PanicMisalignedPointerDereference, vec![required, found, location])
}
_ => {
let msg = bx.const_str(msg.description());
// It's `pub fn panic(expr: &str)`, with the wide reference being passed