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 // Check that blacklist does not affect generated code. 7 // RUN: echo "src:*" > %t-all.blacklist 8 // RUN: %clang_cc1 -triple x86_64-unknown-linux -O0 -fsanitize-cfi-cross-dso \ 9 // RUN: -fsanitize=cfi-vcall -fsanitize-blacklist=%t-all.blacklist \ 10 // RUN: -emit-llvm -o - %s | FileCheck %s 11 12 void caller(void (*f)()) { 13 f(); 14 } 15 16 // CHECK: define weak_odr hidden void @__cfi_check_fail(i8*, i8*) 17 // CHECK: store i8* %0, i8** %[[ALLOCA0:.*]], align 8 18 // CHECK: store i8* %1, i8** %[[ALLOCA1:.*]], align 8 19 // CHECK: %[[DATA:.*]] = load i8*, i8** %[[ALLOCA0]], align 8 20 // CHECK: %[[ADDR:.*]] = load i8*, i8** %[[ALLOCA1]], align 8 21 // CHECK: %[[ICMP_NOT_NULL:.*]] = icmp ne i8* %[[DATA]], null 22 // CHECK: br i1 %[[ICMP_NOT_NULL]], label %[[CONT0:.*]], label %[[TRAP:.*]], 23 24 // CHECK: [[TRAP]]: 25 // CHECK-NEXT: call void @llvm.trap() 26 // CHECK-NEXT: unreachable 27 28 // CHECK: [[CONT0]]: 29 // CHECK: %[[A:.*]] = bitcast i8* %[[DATA]] to { i8, { i8*, i32, i32 }, i8* }* 30 // CHECK: %[[KINDPTR:.*]] = getelementptr {{.*}} %[[A]], i32 0, i32 0 31 // CHECK: %[[KIND:.*]] = load i8, i8* %[[KINDPTR]], align 4 32 // CHECK: %[[VTVALID0:.*]] = call i1 @llvm.type.test(i8* %[[ADDR]], metadata !"all-vtables") 33 // CHECK: %[[VTVALID:.*]] = zext i1 %[[VTVALID0]] to i64 34 // CHECK: %[[NOT_0:.*]] = icmp ne i8 %[[KIND]], 0 35 // CHECK: br i1 %[[NOT_0]], label %[[CONT1:.*]], label %[[HANDLE0:.*]], !prof 36 37 // CHECK: [[HANDLE0]]: 38 // CHECK: %[[DATA0:.*]] = ptrtoint i8* %[[DATA]] to i64, 39 // CHECK: %[[ADDR0:.*]] = ptrtoint i8* %[[ADDR]] to i64, 40 // CHECK: call void @__ubsan_handle_cfi_check_fail_abort(i64 %[[DATA0]], i64 %[[ADDR0]], i64 %[[VTVALID]]) 41 // CHECK: unreachable 42 43 // CHECK: [[CONT1]]: 44 // CHECK: %[[NOT_1:.*]] = icmp ne i8 %[[KIND]], 1 45 // CHECK: br i1 %[[NOT_1]], label %[[CONT2:.*]], label %[[HANDLE1:.*]], !nosanitize 46 47 // CHECK: [[HANDLE1]]: 48 // CHECK-NEXT: call void @llvm.trap() 49 // CHECK-NEXT: unreachable 50 51 // CHECK: [[CONT2]]: 52 // CHECK: %[[NOT_2:.*]] = icmp ne i8 %[[KIND]], 2 53 // CHECK: br i1 %[[NOT_2]], label %[[CONT3:.*]], label %[[HANDLE2:.*]], !nosanitize 54 55 // CHECK: [[HANDLE2]]: 56 // CHECK-NEXT: call void @llvm.trap() 57 // CHECK-NEXT: unreachable 58 59 // CHECK: [[CONT3]]: 60 // CHECK: %[[NOT_3:.*]] = icmp ne i8 %[[KIND]], 3 61 // CHECK: br i1 %[[NOT_3]], label %[[CONT4:.*]], label %[[HANDLE3:.*]], !nosanitize 62 63 // CHECK: [[HANDLE3]]: 64 // CHECK-NEXT: call void @llvm.trap() 65 // CHECK-NEXT: unreachable 66 67 // CHECK: [[CONT4]]: 68 // CHECK: %[[NOT_4:.*]] = icmp ne i8 %[[KIND]], 4 69 // CHECK: br i1 %[[NOT_4]], label %[[CONT5:.*]], label %[[HANDLE4:.*]], !nosanitize 70 71 // CHECK: [[HANDLE4]]: 72 // CHECK-NEXT: call void @llvm.trap() 73 // CHECK-NEXT: unreachable 74 75 // CHECK: [[CONT5]]: 76 // CHECK: ret void 77