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| 1 | +// RUN: %clang_cc1 -fsyntax-only -verify=expected-nowarn %s |
| 2 | +// RUN: %clang_cc1 -Wpointer-arith -fsyntax-only -verify=expected-warn %s |
| 3 | +// RUN: %clang_cc1 -fexperimental-bounds-safety -fsyntax-only -verify=expected-bounds %s |
| 4 | + |
| 5 | +// expected-nowarn-no-diagnostics |
| 6 | +// expected-bounds-no-diagnostics |
| 7 | + |
| 8 | +#define NULL (void*)0 |
| 9 | +#define __counted_by(f) __attribute__((counted_by(f))) |
| 10 | +#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f))) |
| 11 | +#define __sized_by(f) __attribute__((sized_by(f))) |
| 12 | + |
| 13 | +//============================================================================== |
| 14 | +// Test: counted_by on void* is allowed (warns with -Wpointer-arith) |
| 15 | +//============================================================================== |
| 16 | + |
| 17 | +struct test_void_ptr_gnu { |
| 18 | + int count; |
| 19 | + // expected-warn-warning@+2{{'counted_by' on a pointer to void is a GNU extension, treated as 'sized_by'}} |
| 20 | + // expected-warn-note@+1{{use '__sized_by' to suppress this warning}} |
| 21 | + void* buf __counted_by(count); |
| 22 | +}; |
| 23 | + |
| 24 | +struct test_const_void_ptr_gnu { |
| 25 | + int count; |
| 26 | + // expected-warn-warning@+2{{'counted_by' on a pointer to void is a GNU extension, treated as 'sized_by'}} |
| 27 | + // expected-warn-note@+1{{use '__sized_by' to suppress this warning}} |
| 28 | + const void* buf __counted_by(count); |
| 29 | +}; |
| 30 | + |
| 31 | +struct test_volatile_void_ptr_gnu { |
| 32 | + int count; |
| 33 | + // expected-warn-warning@+2{{'counted_by' on a pointer to void is a GNU extension, treated as 'sized_by'}} |
| 34 | + // expected-warn-note@+1{{use '__sized_by' to suppress this warning}} |
| 35 | + volatile void* buf __counted_by(count); |
| 36 | +}; |
| 37 | + |
| 38 | +struct test_const_volatile_void_ptr_gnu { |
| 39 | + int count; |
| 40 | + // expected-warn-warning@+2{{'counted_by' on a pointer to void is a GNU extension, treated as 'sized_by'}} |
| 41 | + // expected-warn-note@+1{{use '__sized_by' to suppress this warning}} |
| 42 | + const volatile void* buf __counted_by(count); |
| 43 | +}; |
| 44 | + |
| 45 | +// Verify sized_by still works the same way (always allowed, no warning) |
| 46 | +struct test_sized_by_void_ptr { |
| 47 | + int size; |
| 48 | + void* buf __sized_by(size); // OK in both modes, no warning |
| 49 | +}; |
| 50 | + |
| 51 | +//============================================================================== |
| 52 | +// Test: counted_by_or_null on void* behaves the same |
| 53 | +//============================================================================== |
| 54 | + |
| 55 | +struct test_void_ptr_or_null_gnu { |
| 56 | + int count; |
| 57 | + // expected-warn-warning@+2{{'counted_by_or_null' on a pointer to void is a GNU extension, treated as 'sized_by_or_null'}} |
| 58 | + // expected-warn-note@+1{{use '__sized_by_or_null' to suppress this warning}} |
| 59 | + void* buf __counted_by_or_null(count); |
| 60 | +}; |
| 61 | + |
| 62 | +struct test_const_void_ptr_or_null_gnu { |
| 63 | + int count; |
| 64 | + // expected-warn-warning@+2{{'counted_by_or_null' on a pointer to void is a GNU extension, treated as 'sized_by_or_null'}} |
| 65 | + // expected-warn-note@+1{{use '__sized_by_or_null' to suppress this warning}} |
| 66 | + const void* buf __counted_by_or_null(count); |
| 67 | +}; |
| 68 | + |
| 69 | +//============================================================================== |
| 70 | +// Test: Using void* __counted_by(...) pointers (not just declaring them) |
| 71 | +//============================================================================== |
| 72 | + |
| 73 | +// Verify that void* __counted_by pointers can be used as rvalues, assigned to, |
| 74 | +// passed to functions, etc. |
| 75 | + |
| 76 | +void* use_as_rvalue(struct test_void_ptr_gnu* t) { |
| 77 | + return t->buf; |
| 78 | +} |
| 79 | + |
| 80 | +void assign_to_pointer(struct test_void_ptr_gnu* t) { |
| 81 | + t->buf = NULL; |
| 82 | + t->count = 0; |
| 83 | +} |
| 84 | + |
| 85 | +extern void* my_allocator(unsigned long); |
| 86 | + |
| 87 | +void assign_from_allocator(struct test_void_ptr_gnu* t) { |
| 88 | + t->buf = my_allocator(100); |
| 89 | + t->count = 100; |
| 90 | +} |
| 91 | + |
| 92 | +void takes_void_ptr(void* p); |
| 93 | + |
| 94 | +void pass_to_function(struct test_void_ptr_gnu* t) { |
| 95 | + takes_void_ptr(t->buf); |
| 96 | +} |
| 97 | + |
| 98 | +void* pointer_arithmetic(struct test_void_ptr_gnu* t) { |
| 99 | + // expected-warn-warning@+1{{arithmetic on a pointer to void is a GNU extension}} |
| 100 | + return t->buf + 10; |
| 101 | +} |
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