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Keep ASAN happy on type assertions

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gingerBill
2024-11-13 18:32:50 +00:00
parent 91bd5d4418
commit 89a5decc33
1 changed files with 10 additions and 2 deletions
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src/llvm_backend_utility.cpp
+10 -2
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@@ -124,8 +124,16 @@ gb_internal void lb_mem_zero_ptr(lbProcedure *p, LLVMValueRef ptr, Type *type, u
switch (kind) { switch (kind) {
case LLVMStructTypeKind: case LLVMStructTypeKind:
case LLVMArrayTypeKind: case LLVMArrayTypeKind:
// NOTE(bill): Enforce zeroing through memset to make sure padding is zeroed too if (is_type_tuple(type)) {
lb_mem_zero_ptr_internal(p, ptr, lb_const_int(p->module, t_int, sz).value, alignment, false); // NOTE(bill): even though this should be safe, to keep ASAN happy, do not zero the implicit padding at the end
GB_ASSERT(type->kind == Type_Tuple);
i64 n = type->Tuple.variables.count-1;
i64 end_offset = type->Tuple.offsets[n] + type_size_of(type->Tuple.variables[n]->type);
lb_mem_zero_ptr_internal(p, ptr, lb_const_int(p->module, t_int, end_offset).value, alignment, false);
} else {
// NOTE(bill): Enforce zeroing through memset to make sure padding is zeroed too
lb_mem_zero_ptr_internal(p, ptr, lb_const_int(p->module, t_int, sz).value, alignment, false);
}
break; break;
default: default:
LLVMBuildStore(p->builder, LLVMConstNull(lb_type(p->module, type)), ptr); LLVMBuildStore(p->builder, LLVMConstNull(lb_type(p->module, type)), ptr);