1 // __cfi_check_fail codegen when not all CFI checkers are enabled. 2 // RUN: %clang_cc1 -triple x86_64-unknown-linux -O0 -fsanitize-cfi-cross-dso \ 3 // RUN: -fsanitize=cfi-vcall \ 4 // RUN: -emit-llvm -o - %s | FileCheck %s 5 6 void caller(void (*f)()) { 7 f(); 8 } 9 10 // CHECK: define weak_odr hidden void @__cfi_check_fail(i8*, i8*) 11 // CHECK: store i8* %0, i8** %[[ALLOCA0:.*]], align 8 12 // CHECK: store i8* %1, i8** %[[ALLOCA1:.*]], align 8 13 // CHECK: %[[DATA:.*]] = load i8*, i8** %[[ALLOCA0]], align 8 14 // CHECK: %[[ADDR:.*]] = load i8*, i8** %[[ALLOCA1]], align 8 15 // CHECK: %[[ICMP_NOT_NULL:.*]] = icmp ne i8* %[[DATA]], null 16 // CHECK: br i1 %[[ICMP_NOT_NULL]], label %[[CONT0:.*]], label %[[TRAP:.*]], 17 18 // CHECK: [[TRAP]]: 19 // CHECK-NEXT: call void @llvm.trap() 20 // CHECK-NEXT: unreachable 21 22 // CHECK: [[CONT0]]: 23 // CHECK: %[[A:.*]] = bitcast i8* %[[DATA]] to { i8, { i8*, i32, i32 }, i8* }* 24 // CHECK: %[[KINDPTR:.*]] = getelementptr {{.*}} %[[A]], i32 0, i32 0 25 // CHECK: %[[KIND:.*]] = load i8, i8* %[[KINDPTR]], align 4 26 // CHECK: %[[VTVALID0:.*]] = call i1 @llvm.type.test(i8* %[[ADDR]], metadata !"all-vtables") 27 // CHECK: %[[VTVALID:.*]] = zext i1 %[[VTVALID0]] to i64 28 // CHECK: %[[NOT_0:.*]] = icmp ne i8 %[[KIND]], 0 29 // CHECK: br i1 %[[NOT_0]], label %[[CONT1:.*]], label %[[HANDLE0:.*]], !prof 30 31 // CHECK: [[HANDLE0]]: 32 // CHECK: %[[DATA0:.*]] = ptrtoint i8* %[[DATA]] to i64, 33 // CHECK: %[[ADDR0:.*]] = ptrtoint i8* %[[ADDR]] to i64, 34 // CHECK: call void @__ubsan_handle_cfi_check_fail_abort(i64 %[[DATA0]], i64 %[[ADDR0]], i64 %[[VTVALID]]) 35 // CHECK: unreachable 36 37 // CHECK: [[CONT1]]: 38 // CHECK: %[[NOT_1:.*]] = icmp ne i8 %[[KIND]], 1 39 // CHECK: br i1 %[[NOT_1]], label %[[CONT2:.*]], label %[[HANDLE1:.*]], !nosanitize 40 41 // CHECK: [[HANDLE1]]: 42 // CHECK-NEXT: call void @llvm.trap() 43 // CHECK-NEXT: unreachable 44 45 // CHECK: [[CONT2]]: 46 // CHECK: %[[NOT_2:.*]] = icmp ne i8 %[[KIND]], 2 47 // CHECK: br i1 %[[NOT_2]], label %[[CONT3:.*]], label %[[HANDLE2:.*]], !nosanitize 48 49 // CHECK: [[HANDLE2]]: 50 // CHECK-NEXT: call void @llvm.trap() 51 // CHECK-NEXT: unreachable 52 53 // CHECK: [[CONT3]]: 54 // CHECK: %[[NOT_3:.*]] = icmp ne i8 %[[KIND]], 3 55 // CHECK: br i1 %[[NOT_3]], label %[[CONT4:.*]], label %[[HANDLE3:.*]], !nosanitize 56 57 // CHECK: [[HANDLE3]]: 58 // CHECK-NEXT: call void @llvm.trap() 59 // CHECK-NEXT: unreachable 60 61 // CHECK: [[CONT4]]: 62 // CHECK: %[[NOT_4:.*]] = icmp ne i8 %[[KIND]], 4 63 // CHECK: br i1 %[[NOT_4]], label %[[CONT5:.*]], label %[[HANDLE4:.*]], !nosanitize 64 65 // CHECK: [[HANDLE4]]: 66 // CHECK-NEXT: call void @llvm.trap() 67 // CHECK-NEXT: unreachable 68 69 // CHECK: [[CONT5]]: 70 // CHECK: ret void 71
