| 1 | // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux -emit-llvm -fsanitize=null %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NULL --check-prefix=ITANIUM |
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| 2 | // RUN: %clang_cc1 -std=c++11 -triple x86_64-windows -emit-llvm -fsanitize=null %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NULL --check-prefix=MSABI |
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| 3 | // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux -emit-llvm -fsanitize=null,vptr %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VPTR --check-prefix=ITANIUM |
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| 4 | // RUN: %clang_cc1 -std=c++11 -triple x86_64-windows -emit-llvm -fsanitize=null,vptr %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VPTR --check-prefix=MSABI --check-prefix=CHECK-VPTR-MS |
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| 5 | struct T { |
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| 6 | virtual ~T() {} |
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| 7 | virtual int v() { return 1; } |
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| 8 | }; |
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| 9 | |
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| 10 | struct U : T { |
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| 11 | ~U(); |
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| 12 | virtual int v() { return 2; } |
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| 13 | }; |
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| 14 | |
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| 15 | U::~U() {} |
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| 16 | |
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| 17 | // CHECK-VPTR-MS: @__ubsan_vptr_type_cache = external dso_local |
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| 18 | |
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| 19 | // ITANIUM: define i32 @_Z5get_vP1T |
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| 20 | // MSABI: define dso_local i32 @"?get_v |
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| 21 | int get_v(T* t) { |
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| 22 | // First, we check that vtable is not loaded before a type check. |
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| 23 | // CHECK-NULL-NOT: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})*** |
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| 24 | // CHECK-NULL: [[UBSAN_CMP_RES:%[0-9]+]] = icmp ne %struct.T* %{{[_a-z0-9]+}}, null |
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| 25 | // CHECK-NULL-NEXT: br i1 [[UBSAN_CMP_RES]], label %{{.*}}, label %{{.*}} |
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| 26 | // CHECK-NULL: call void @__ubsan_handle_type_mismatch_v1_abort |
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| 27 | // Second, we check that vtable is actually loaded once the type check is done. |
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| 28 | // CHECK-NULL: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})*** |
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| 29 | return t->v(); |
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| 30 | } |
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| 31 | |
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| 32 | // ITANIUM: define void @_Z9delete_itP1T |
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| 33 | // MSABI: define dso_local void @"?delete_it |
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| 34 | void delete_it(T *t) { |
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| 35 | // First, we check that vtable is not loaded before a type check. |
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| 36 | // CHECK-VPTR-NOT: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})*** |
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| 37 | // CHECK-VPTR: br i1 {{.*}} label %{{.*}} |
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| 38 | // CHECK-VPTR: call void @__ubsan_handle_dynamic_type_cache_miss_abort |
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| 39 | // Second, we check that vtable is actually loaded once the type check is done. |
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| 40 | // CHECK-VPTR: load {{.*}} (%struct.T*{{.*}})**, {{.*}} (%struct.T*{{.*}})*** |
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| 41 | delete t; |
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| 42 | } |
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| 43 | |
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| 44 | // ITANIUM: define %struct.U* @_Z7dyncastP1T |
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| 45 | // MSABI: define dso_local %struct.U* @"?dyncast |
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| 46 | U* dyncast(T *t) { |
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| 47 | // First, we check that dynamic_cast is not called before a type check. |
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| 48 | // CHECK-VPTR-NOT: call i8* @__{{dynamic_cast|RTDynamicCast}} |
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| 49 | // CHECK-VPTR: br i1 {{.*}} label %{{.*}} |
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| 50 | // CHECK-VPTR: call void @__ubsan_handle_dynamic_type_cache_miss_abort |
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| 51 | // Second, we check that dynamic_cast is actually called once the type check is done. |
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| 52 | // CHECK-VPTR: call i8* @__{{dynamic_cast|RTDynamicCast}} |
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| 53 | return dynamic_cast<U*>(t); |
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| 54 | } |
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| 55 | |
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