clang/test/CodeGen/cfi-check-fail2.c

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