1// REQUIRES: asserts 2// RUN: %clang_cc1 -x objective-c -emit-llvm -triple x86_64-apple-macosx10.10.0 -fsanitize=nullability-return,returns-nonnull-attribute,nullability-arg,nonnull-attribute %s -o - -w | FileCheck %s 3 4// If both the annotation and the attribute are present, prefer the attribute, 5// since it actually affects IRGen. 6 7// CHECK-LABEL: define{{.*}} nonnull i32* @f1 8__attribute__((returns_nonnull)) int *_Nonnull f1(int *_Nonnull p) { 9 // CHECK: entry: 10 // CHECK-NEXT: [[SLOC_PTR:%.*]] = alloca i8* 11 // CHECK-NEXT: [[ADDR:%.*]] = alloca i32* 12 // CHECK-NEXT: store i8* null, i8** [[SLOC_PTR]] 13 // CHECK-NEXT: store i32* [[P:%.*]], i32** [[ADDR]] 14 // CHECK-NEXT: store {{.*}} [[SLOC_PTR]] 15 // CHECK-NEXT: [[ARG:%.*]] = load i32*, i32** [[ADDR]] 16 // CHECK-NEXT: [[SLOC:%.*]] = load {{.*}} [[SLOC_PTR]] 17 // CHECK-NEXT: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC]], null 18 // CHECK-NEXT: br i1 [[SLOC_NONNULL]], label %nullcheck 19 // 20 // CHECK: nullcheck: 21 // CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32* [[ARG]], null, !nosanitize 22 // CHECK-NEXT: br i1 [[ICMP]], label %[[CONT:.+]], label %[[HANDLE:[^,]+]] 23 // CHECK: [[HANDLE]]: 24 // CHECK: call void @__ubsan_handle_nonnull_return 25 // CHECK-NEXT: unreachable, !nosanitize 26 // CHECK: [[CONT]]: 27 // CHECK-NEXT: br label %no.nullcheck 28 // CHECK: no.nullcheck: 29 // CHECK-NEXT: ret i32* [[ARG]] 30 return p; 31} 32 33// CHECK-LABEL: define{{.*}} void @f2 34void f2(int *_Nonnull __attribute__((nonnull)) p) {} 35 36// CHECK-LABEL: define{{.*}} void @call_f2 37void call_f2() { 38 // CHECK: call void @__ubsan_handle_nonnull_arg_abort 39 // CHECK-NOT: call void @__ubsan_handle_nonnull_arg_abort 40 f2((void *)0); 41} 42 43// If the return value isn't meant to be checked, make sure we don't check it. 44// CHECK-LABEL: define{{.*}} i32* @f3 45int *f3(int *p) { 46 // CHECK-NOT: return.sloc 47 // CHECK-NOT: call{{.*}}ubsan 48 return p; 49} 50 51// Check for a valid "return" source location, even when there is no return 52// statement, to avoid accidentally calling the runtime. 53 54// CHECK-LABEL: define{{.*}} nonnull i32* @f4 55__attribute__((returns_nonnull)) int *f4() { 56 // CHECK: store i8* null, i8** [[SLOC_PTR:%.*]] 57 // CHECK: [[SLOC:%.*]] = load {{.*}} [[SLOC_PTR]] 58 // CHECK: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC]], null 59 // CHECK: br i1 [[SLOC_NONNULL]], label %nullcheck 60 // CHECK: nullcheck: 61} 62