clang/test/Sema/attr-sized-by-last-field.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify=expected,immediate %s
   2 // RUN: %clang_cc1 -fexperimental-late-parse-attributes -fsyntax-only -verify=expected,late %s
   3
   4 #define __sized_by(f)  __attribute__((sized_by(f)))
   5
   6 // This has been adapted from clang/test/Sema/attr-counted-by-vla.c, but with VLAs replaced with pointers
   7
   8 struct bar;
   9
  10 struct not_found {
  11   int size;
  12   struct bar *ptr __sized_by(bork); // expected-error {{use of undeclared identifier 'bork'}}
  13 };
  14
  15 struct no_found_size_not_in_substruct {
  16   unsigned long flags;
  17   unsigned char size; // expected-note {{'size' declared here}}
  18   struct A {
  19     int dummy;
  20     int * ptr __sized_by(size); // expected-error {{'sized_by' field 'size' isn't within the same struct as the annotated pointer}}
  21   } a;
  22 };
  23
  24 struct not_found_size_not_in_unnamed_substruct {
  25   unsigned char size; // expected-note {{'size' declared here}}
  26   struct {
  27     int dummy;
  28     int * ptr __sized_by(size); // expected-error {{'sized_by' field 'size' isn't within the same struct as the annotated pointer}}
  29   } a;
  30 };
  31
  32 struct not_found_size_not_in_unnamed_substruct_2 {
  33   struct {
  34     unsigned char size; // expected-note {{'size' declared here}}
  35   };
  36   struct {
  37     int dummy;
  38     int * ptr __sized_by(size); // expected-error {{'sized_by' field 'size' isn't within the same struct as the annotated pointer}}
  39   } a;
  40 };
  41
  42 struct not_found_size_in_other_unnamed_substruct {
  43   struct {
  44     unsigned char size;
  45   } a1;
  46
  47   struct {
  48     int dummy;
  49     int * ptr __sized_by(size); // expected-error {{use of undeclared identifier 'size'}}
  50   };
  51 };
  52
  53 struct not_found_size_in_other_substruct {
  54   struct _a1 {
  55     unsigned char size;
  56   } a1;
  57
  58   struct {
  59     int dummy;
  60     int * ptr __sized_by(size); // expected-error {{use of undeclared identifier 'size'}}
  61   };
  62 };
  63
  64 struct not_found_size_in_other_substruct_2 {
  65   struct _a2 {
  66     unsigned char size;
  67   } a2;
  68
  69   int * ptr __sized_by(size); // expected-error {{use of undeclared identifier 'size'}}
  70 };
  71
  72 struct not_found_suggest {
  73   int bork;
  74   struct bar **ptr __sized_by(blork); // expected-error {{use of undeclared identifier 'blork'}}
  75 };
  76
  77 int global; // expected-note {{'global' declared here}}
  78
  79 struct found_outside_of_struct {
  80   int bork;
  81   struct bar ** ptr __sized_by(global); // expected-error {{field 'global' in 'sized_by' not inside structure}}
  82 };
  83
  84 struct self_referrential {
  85   int bork;
  86   // immediate-error@+2{{use of undeclared identifier 'self'}}
  87   // late-error@+1{{'sized_by' only applies to pointers; did you mean to use 'counted_by'?}}
  88   struct bar *self[] __sized_by(self);
  89 };
  90
  91 struct non_int_size {
  92   double dbl_size;
  93   struct bar ** ptr __sized_by(dbl_size); // expected-error {{'sized_by' requires a non-boolean integer type argument}}
  94 };
  95
  96 struct array_of_ints_size {
  97   int integers[2];
  98   struct bar ** ptr __sized_by(integers); // expected-error {{'sized_by' requires a non-boolean integer type argument}}
  99 };
 100
 101 struct not_a_c99_fam {
 102   int size;
 103   struct bar *non_c99_fam[0] __sized_by(size); // expected-error {{'sized_by' only applies to pointers; did you mean to use 'counted_by'?}}
 104 };
 105
 106 struct annotated_with_anon_struct {
 107   unsigned long flags;
 108   struct {
 109     unsigned char size;
 110     int * ptr __sized_by(crount); // expected-error {{use of undeclared identifier 'crount'}}
 111   };
 112 };
 113
 114 //==============================================================================
 115 // __sized_by on a struct ptr with element type that has unknown size
 116 //==============================================================================
 117
 118 struct size_unknown;
 119 struct on_member_ptr_incomplete_ty_ty_pos {
 120   int size;
 121   struct size_unknown * ptr __sized_by(size);
 122 };
 123
 124 struct on_member_ptr_incomplete_const_ty_ty_pos {
 125   int size;
 126   const struct size_unknown * ptr __sized_by(size);
 127 };
 128
 129 struct on_member_ptr_void_ty_ty_pos {
 130   int size;
 131   void * ptr __sized_by(size);
 132 };
 133
 134 typedef void(fn_ty)(int);
 135
 136 struct on_member_ptr_fn_ptr_ty {
 137   int size;
 138   fn_ty* * ptr __sized_by(size);
 139 };
 140
 141 struct on_member_ptr_fn_ty {
 142   int size;
 143   // expected-error@+1{{'sized_by' cannot be applied to a pointer with pointee of unknown size because 'fn_ty' (aka 'void (int)') is a function type}}
 144   fn_ty * ptr __sized_by(size);
 145 };