gcc/testsuite/gcc.dg/attr-access-write-only.c

   1 /* PR middle-end/83859 - attribute to establish relation between parameters
   2    for buffer and its size
   3    Test to verify the handling of attribute access (write_only) syntax.
   4    { dg-do compile }
   5    { dg-options "-Wall -ftrack-macro-expansion=0" } */
   6
   7 int  __attribute__ ((access))
   8 access_v (void);       // { dg-error "wrong number of arguments specified for 'access' attribute" }
   9
  10 int  __attribute__ ((access ()))
  11 access___v (void);     // { dg-error "wrong number of arguments specified for 'access' attribute" }
  12
  13 int  __attribute__ ((access (wronly)))
  14 wronly_spelling (void);   // { dg-error "attribute .access. invalid mode 'wronly'; expected one of 'read_only', 'read_write', 'write_only', or 'none'" }
  15
  16 int  __attribute__ ((access (read_only)))
  17 wronly_v_all (void);   // { dg-error "attribute .access\\(read_only\\). missing an argument" }
  18
  19 int  __attribute__ ((access (read_only ())))
  20 wronly___v_all (void);   // { dg-error "attribute 'access' unexpected '\\(' after mode 'read_only'; expected a positional argument or '\\)'" }
  21 // { dg-warning "implicit declaration of function 'read_only'" "" { target *-*-* } .-2 }
  22
  23
  24 int wronly (void);
  25
  26 int  __attribute__ ((access (wronly ())))
  27 wronly___v_all (void);   // { dg-error "attribute 'access' invalid mode 'wronly'" }
  28
  29 #define WRONLY(...)  __attribute__ ((access (write_only, __VA_ARGS__)))
  30
  31 int WRONLY (1)
  32 wronly_pcv_1 (void*);
  33 int WRONLY (2)
  34 wronly_i_pcv_2 (int, void*);
  35 int WRONLY (3)
  36 wronly_i_i_pcv_3 (int, int, void*);
  37
  38 int WRONLY (0 + 1)
  39 wronly_pcv_0p1 (void*);
  40
  41 int WRONLY (2 - 1)
  42 wronly_pcv_2m1 (void*);
  43
  44 int WRONLY (1, 1)
  45 wronly_pv_pi_1_1 (void*, const int*);      // { dg-error "attribute 'access\\(write_only, 1, 1\\)' positional argument 2 references non-integer argument type 'void \\*'" }
  46
  47 int WRONLY (1, 2)
  48 wronly_pcv_pc_1_2 (void*, char*);   // { dg-error "attribute .access\\(write_only, 1, 2\\)' positional argument 2 references non-integer argument type 'char \\*'" }
  49
  50 int WRONLY (2, 1)
  51 wronly_pcd_pcv_2_1 (const double*, void*);   // { dg-error "attribute .access\\(write_only, 2, 1\\)' positional argument 2 references non-integer argument type 'const double \\*'" }
  52
  53 int WRONLY (2, 2)
  54 wronly_pi_pcv_2_2 (int*, void*);   // { dg-error "positional argument 2 references non-integer argument type 'void \\*'" }
  55
  56 int WRONLY (4)
  57 wronly_i_i_i_4 (int, int, int);   // { dg-error "attribute 'access\\(write_only, 4\\)' positional argument 1 value 4 exceeds number of function arguments 3" }
  58
  59 int WRONLY (1)
  60 wronly_i_1 (int);   // { dg-error "attribute 'access\\(write_only, 1\\)' positional argument 1 references non-pointer argument type 'int'" }
  61
  62 int WRONLY (2)
  63 wronly_i_pc (int, const char*);   // { dg-error "attribute 'access\\(write_only, 2\\)' positional argument 1 references 'const'-qualified argument type 'const char \\*'" }
  64
  65 int WRONLY (-1)
  66 wronly_pcv_m1 (void*);   // { dg-error "attribute 'access\\(write_only, -1\\)' positional argument 1 invalid value -1" }
  67
  68 int WRONLY (1, -12345)
  69 wronly_pcv_i_1_m12345 (void*, int*);   // { dg-error "attribute 'access\\(write_only, 1, -12345\\)' positional argument 2 invalid value -12345" }
  70
  71 int WRONLY ("blah")
  72 wronly_pcv_str (void*);   // { dg-error "attribute 'access\\(write_only, \"blah\"\\)' invalid positional argument 1" }
  73
  74 int WRONLY (1, "foobar")
  75 wronly_pcv_i_1_str (void*, int);   // { dg-error "attribute 'access\\(write_only, 1, \"foobar\"\\)' invalid positional argument 2" }
  76
  77 // Verify that attributes whose operands reference function pointers
  78 // are rejected.
  79 typedef int F (int, int);
  80 WRONLY (1) void wronly_pf_1 (F*);   // { dg-error "attribute 'access\\(write_only, 1\\)' positional argument 1 references argument of function type 'F' \\{aka 'int\\(int,  *int\\)'\\}" }
  81
  82 // Verify pointers to functions.
  83 void WRONLY(2) (*pwronly_pcv2)(int, void*);
  84 void WRONLY(3, 1) (*pwronly_pcv2_1)(int, void*, void*);
  85 void WRONLY(1, 2) (*pwronly_i_pcv_1_2)(int, void*);   // { dg-error "attribute 'access\\(write_only, 1, 2\\)' positional argument 1 references non-pointer argument type 'int'" }
  86
  87 // Verify types.
  88 typedef WRONLY (2) void wronly_p2_t (const int*, char*, const void*);
  89 typedef WRONLY (2) void wronly_p2_1 (int, int*);