Artem Dergachev | a2e0536 | 2018-05-04 20:52:39 +0000 | [diff] [blame] | 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -verify %s |
| 2 | |
| 3 | |
| 4 | static const unsigned long long scull = 0; |
| 5 | void static_int() |
| 6 | { |
| 7 | *(int*)scull = 0; // expected-warning{{Dereference of null pointer}} |
| 8 | } |
| 9 | |
| 10 | const unsigned long long cull = 0; |
| 11 | void const_int() |
| 12 | { |
| 13 | *(int*)cull = 0; // expected-warning{{Dereference of null pointer}} |
| 14 | } |
| 15 | |
| 16 | static int * const spc = 0; |
| 17 | void static_ptr() |
| 18 | { |
| 19 | *spc = 0; // expected-warning{{Dereference of null pointer}} |
| 20 | } |
| 21 | |
| 22 | int * const pc = 0; |
| 23 | void const_ptr() |
| 24 | { |
| 25 | *pc = 0; // expected-warning{{Dereference of null pointer}} |
| 26 | } |
| 27 | |
| 28 | const unsigned long long cull_nonnull = 4; |
| 29 | void nonnull_int() |
| 30 | { |
| 31 | *(int*)(cull_nonnull - 4) = 0; // expected-warning{{Dereference of null pointer}} |
| 32 | } |
| 33 | |
| 34 | int * const pc_nonnull = (int*)sizeof(int); |
| 35 | void nonnull_ptr() |
| 36 | { |
| 37 | *(pc_nonnull - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 38 | } |
| 39 | |
| 40 | int * const constcast = const_cast<int * const>((int*)sizeof(int)); |
| 41 | void cast1() |
| 42 | { |
| 43 | *(constcast - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 44 | } |
| 45 | |
| 46 | int * const recast = reinterpret_cast<int*>(sizeof(int)); |
| 47 | void cast2() |
| 48 | { |
| 49 | *(recast - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 50 | } |
| 51 | |
| 52 | int * const staticcast = static_cast<int * const>((int*)sizeof(int)); |
| 53 | void cast3() |
| 54 | { |
| 55 | *(staticcast - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 56 | } |
| 57 | |
| 58 | struct Foo { int a; }; |
| 59 | Foo * const dyncast = dynamic_cast<Foo * const>((Foo*)sizeof(Foo)); |
| 60 | void cast4() |
| 61 | { |
| 62 | // Do not handle dynamic_cast for now, because it may change the pointer value. |
| 63 | (dyncast - 1)->a = 0; // no-warning |
| 64 | } |
| 65 | |
| 66 | typedef int * const intptrconst; |
| 67 | int * const funccast = intptrconst(sizeof(int)); |
| 68 | void cast5() |
| 69 | { |
| 70 | *(funccast - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 71 | } |
| 72 | |
| 73 | struct S1 |
| 74 | { |
| 75 | int * p; |
| 76 | }; |
| 77 | const S1 s1 = { |
| 78 | .p = (int*)sizeof(int) |
| 79 | }; |
| 80 | void conststruct() |
| 81 | { |
| 82 | *(s1.p - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 83 | } |
| 84 | |
| 85 | struct S2 |
| 86 | { |
| 87 | int * const p; |
| 88 | }; |
| 89 | S2 s2 = { |
| 90 | .p = (int*)sizeof(int) |
| 91 | }; |
| 92 | void constfield() |
| 93 | { |
| 94 | *(s2.p - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 95 | } |
| 96 | |
| 97 | int * const parr[1] = { (int*)sizeof(int) }; |
| 98 | void constarr() |
| 99 | { |
| 100 | *(parr[0] - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 101 | } |
| 102 | |
| 103 | struct S3 |
| 104 | { |
| 105 | int * p = (int*)sizeof(int); |
| 106 | }; |
| 107 | void recordinit() |
| 108 | { |
| 109 | S3 s3; |
| 110 | *(s3.p - 1) = 0; // expected-warning{{Dereference of null pointer}} |
| 111 | } |