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

   1 // RUN: %clang_cc1 -triple x86_64-unknown-linux -O0 -fsanitize-cfi-cross-dso \
   2 // RUN:     -fsanitize=cfi-icall,cfi-nvcall,cfi-vcall,cfi-unrelated-cast,cfi-derived-cast \
   3 // RUN:     -fsanitize-trap=cfi-icall,cfi-nvcall -fsanitize-recover=cfi-vcall,cfi-unrelated-cast \
   4 // RUN:     -emit-llvm -o - %s | FileCheck %s
   5
   6 void caller(void (*f)(void)) {
   7   f();
   8 }
   9
  10 // CHECK: define weak_odr hidden void @__cfi_check_fail(ptr noundef %0, ptr noundef %1)
  11 // CHECK: store ptr %0, ptr %[[ALLOCA0:.*]], align 8
  12 // CHECK: store ptr %1, ptr %[[ALLOCA1:.*]], align 8
  13 // CHECK: %[[DATA:.*]] = load ptr, ptr %[[ALLOCA0]], align 8
  14 // CHECK: %[[ADDR:.*]] = load ptr, ptr %[[ALLOCA1]], align 8
  15 // CHECK: %[[ICMP_NOT_NULL:.*]] = icmp ne ptr %[[DATA]], null
  16 // CHECK: br i1 %[[ICMP_NOT_NULL]], label %[[CONT0:.*]], label %[[TRAP:.*]],
  17
  18 // CHECK: [[TRAP]]:
  19 // CHECK-NEXT:   call void @llvm.ubsantrap(i8 2)
  20 // CHECK-NEXT:   unreachable
  21
  22 // CHECK: [[CONT0]]:
  23 // CHECK:   %[[KINDPTR:.*]] = getelementptr {{.*}} %[[DATA]], i32 0, i32 0
  24 // CHECK:   %[[KIND:.*]] = load i8, ptr %[[KINDPTR]], align 4
  25 // CHECK:   %[[VTVALID0:.*]] = call i1 @llvm.type.test(ptr %[[ADDR]], metadata !"all-vtables")
  26 // CHECK:   %[[VTVALID:.*]] = zext i1 %[[VTVALID0]] to i64
  27 // CHECK:   %[[NOT_0:.*]] = icmp ne i8 %[[KIND]], 0
  28 // CHECK:   br i1 %[[NOT_0]], label %[[CONT1:.*]], label %[[HANDLE0:.*]], !prof
  29
  30 // CHECK: [[HANDLE0]]:
  31 // CHECK:   %[[DATA0:.*]] = ptrtoint ptr %[[DATA]] to i64,
  32 // CHECK:   %[[ADDR0:.*]] = ptrtoint ptr %[[ADDR]] to i64,
  33 // CHECK:   call void @__ubsan_handle_cfi_check_fail(i64 %[[DATA0]], i64 %[[ADDR0]], i64 %[[VTVALID]])
  34 // CHECK:   br label %[[CONT1]]
  35
  36 // CHECK: [[CONT1]]:
  37 // CHECK:   %[[NOT_1:.*]] = icmp ne i8 %[[KIND]], 1
  38 // CHECK:   br i1 %[[NOT_1]], label %[[CONT2:.*]], label %[[HANDLE1:.*]], !nosanitize
  39
  40 // CHECK: [[HANDLE1]]:
  41 // CHECK-NEXT:   call void @llvm.ubsantrap(i8 2)
  42 // CHECK-NEXT:   unreachable
  43
  44 // CHECK: [[CONT2]]:
  45 // CHECK:   %[[NOT_2:.*]] = icmp ne i8 %[[KIND]], 2
  46 // CHECK:   br i1 %[[NOT_2]], label %[[CONT3:.*]], label %[[HANDLE2:.*]], !prof
  47
  48 // CHECK: [[HANDLE2]]:
  49 // CHECK:   %[[DATA2:.*]] = ptrtoint ptr %[[DATA]] to i64,
  50 // CHECK:   %[[ADDR2:.*]] = ptrtoint ptr %[[ADDR]] to i64,
  51 // CHECK:   call void @__ubsan_handle_cfi_check_fail_abort(i64 %[[DATA2]], i64 %[[ADDR2]], i64 %[[VTVALID]])
  52 // CHECK:   unreachable
  53
  54 // CHECK: [[CONT3]]:
  55 // CHECK:   %[[NOT_3:.*]] = icmp ne i8 %[[KIND]], 3
  56 // CHECK:   br i1 %[[NOT_3]], label %[[CONT4:.*]], label %[[HANDLE3:.*]], !prof
  57
  58 // CHECK: [[HANDLE3]]:
  59 // CHECK:   %[[DATA3:.*]] = ptrtoint ptr %[[DATA]] to i64,
  60 // CHECK:   %[[ADDR3:.*]] = ptrtoint ptr %[[ADDR]] to i64,
  61 // CHECK:   call void @__ubsan_handle_cfi_check_fail(i64 %[[DATA3]], i64 %[[ADDR3]], i64 %[[VTVALID]])
  62 // CHECK:   br label %[[CONT4]]
  63
  64 // CHECK: [[CONT4]]:
  65 // CHECK:   %[[NOT_4:.*]] = icmp ne i8 %[[KIND]], 4
  66 // CHECK:   br i1 %[[NOT_4]], label %[[CONT5:.*]], label %[[HANDLE4:.*]], !nosanitize
  67
  68 // CHECK: [[HANDLE4]]:
  69 // CHECK-NEXT:   call void @llvm.ubsantrap(i8 2)
  70 // CHECK-NEXT:   unreachable
  71
  72 // CHECK: [[CONT5]]:
  73 // CHECK:   ret void
  74
  75 // CHECK: define weak void @__cfi_check(i64 noundef %[[TYPE:.*]], ptr noundef %[[ADDR:.*]], ptr noundef %[[DATA:.*]]){{.*}} align 4096
  76 // CHECK-NOT: }
  77 // CHECK: call void @__cfi_check_fail(ptr %[[DATA]], ptr %[[ADDR]])
  78 // CHECK-NEXT: ret void