Don't crash when local variables are too big to store on the stack

2022-07-22 18:03:24 +00:00 · 2022-07-22 18:03:24 +00:00 · cd96988436
commit cd96988436
parent 5fcedf62df
1 changed files with 6 additions and 0 deletions
--- a/src/value_and_place.rs
+++ b/src/value_and_place.rs
@ -324,6 +324,12 @@ impl<'tcx> CPlace<'tcx> {
            };
        }

+        if layout.size.bytes() >= u64::from(u32::MAX - 16) {
+            fx.tcx
+                .sess
+                .fatal(&format!("values of type {} are too big to store on the stack", layout.ty));
+        }
+
        let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
            kind: StackSlotKind::ExplicitSlot,
            // FIXME Don't force the size to a multiple of 16 bytes once Cranelift gets a way to