1 | // RUN: %clang_cc1 -std=c99 -fsyntax-only -verify %s |
2 | // RUN: %clang_cc1 -x c++ -std=c++98 -fsyntax-only -verify %s |
3 | // RUN: %clang_cc1 -std=c99 -fno-signed-char -fsyntax-only -verify %s |
4 | |
5 | struct A {}; |
6 | |
7 | typedef struct A *MPI_Datatype; |
8 | |
9 | int wrong1(void *buf, MPI_Datatype datatype) |
10 | __attribute__(( pointer_with_type_tag )); // expected-error {{'pointer_with_type_tag' attribute requires exactly 3 arguments}} |
11 | |
12 | int wrong2(void *buf, MPI_Datatype datatype) |
13 | __attribute__(( pointer_with_type_tag(mpi,0,7) )); // expected-error {{attribute parameter 2 is out of bounds}} |
14 | |
15 | int wrong3(void *buf, MPI_Datatype datatype) |
16 | __attribute__(( pointer_with_type_tag(mpi,3,7) )); // expected-error {{attribute parameter 2 is out of bounds}} |
17 | |
18 | int wrong4(void *buf, MPI_Datatype datatype) |
19 | __attribute__(( pointer_with_type_tag(mpi,1,0) )); // expected-error {{attribute parameter 3 is out of bounds}} |
20 | |
21 | int wrong5(void *buf, MPI_Datatype datatype) |
22 | __attribute__(( pointer_with_type_tag(mpi,1,3) )); // expected-error {{attribute parameter 3 is out of bounds}} |
23 | |
24 | int wrong6(void *buf, MPI_Datatype datatype) |
25 | __attribute__(( pointer_with_type_tag(mpi,0x8000000000000001ULL,1) )); // expected-error {{attribute parameter 2 is out of bounds}} |
26 | |
27 | extern int x; |
28 | |
29 | int wrong7(void *buf, MPI_Datatype datatype) |
30 | __attribute__(( pointer_with_type_tag(mpi,x,2) )); // expected-error {{attribute requires parameter 2 to be an integer constant}} |
31 | |
32 | int wrong8(void *buf, MPI_Datatype datatype) |
33 | __attribute__(( pointer_with_type_tag(mpi,1,x) )); // expected-error {{attribute requires parameter 3 to be an integer constant}} |
34 | |
35 | int wrong9 __attribute__(( pointer_with_type_tag(mpi,1,2) )); // expected-error {{'pointer_with_type_tag' attribute only applies to non-K&R-style functions}} |
36 | |
37 | int wrong10(double buf, MPI_Datatype type) |
38 | __attribute__(( pointer_with_type_tag(mpi,1,2) )); // expected-error {{'pointer_with_type_tag' attribute only applies to pointer arguments}} |
39 | |
40 | int ok11(void *, ...) |
41 | __attribute__(( pointer_with_type_tag(mpi,1,2) )); |
42 | int wrong11(void *, ...) |
43 | __attribute__(( pointer_with_type_tag(mpi,2,3) )); // expected-error {{'pointer_with_type_tag' attribute only applies to pointer arguments}} |
44 | |
45 | extern struct A datatype_wrong1 |
46 | __attribute__(( type_tag_for_datatype )); // expected-error {{'type_tag_for_datatype' attribute requires parameter 1 to be an identifier}} |
47 | |
48 | extern struct A datatype_wrong2 |
49 | __attribute__(( type_tag_for_datatype(mpi,1,2) )); // expected-error {{expected a type}} |
50 | |
51 | extern struct A datatype_wrong3 |
52 | __attribute__(( type_tag_for_datatype(mpi,not_a_type) )); // expected-error {{unknown type name 'not_a_type'}} |
53 | |
54 | extern struct A datatype_wrong4 |
55 | __attribute__(( type_tag_for_datatype(mpi,int,int) )); // expected-error {{expected identifier}} |
56 | |
57 | extern struct A datatype_wrong5 |
58 | __attribute__(( type_tag_for_datatype(mpi,int,not_a_flag) )); // expected-error {{invalid comparison flag 'not_a_flag'}} |
59 | |
60 | extern struct A datatype_wrong6 |
61 | __attribute__(( type_tag_for_datatype(mpi,int,layout_compatible,not_a_flag) )); // expected-error {{invalid comparison flag 'not_a_flag'}} |
62 | |
63 | |
64 | void datatype_wrong7(void) __attribute__((type_tag_for_datatype(datatype_wrong7, int))); // expected-error {{'type_tag_for_datatype' attribute only applies to variables}} |
65 | |
66 | // Using a tag with kind A in a place where the function requires kind B should |
67 | // warn. |
68 | |
69 | void A_func(void *ptr, void *tag) __attribute__(( pointer_with_type_tag(a,1,2) )); |
70 | |
71 | extern struct A A_tag __attribute__(( type_tag_for_datatype(a,int) )); |
72 | extern struct A B_tag __attribute__(( type_tag_for_datatype(b,int) )); |
73 | |
74 | void C_func(void *ptr, int tag) __attribute__(( pointer_with_type_tag(c,1,2) )); |
75 | |
76 | static const int C_tag __attribute__(( type_tag_for_datatype(c,int) )) = 10; |
77 | static const int D_tag __attribute__(( type_tag_for_datatype(d,int) )) = 20; |
78 | |
79 | void test_tag_mismatch(int *ptr) |
80 | { |
81 | A_func(ptr, &A_tag); // no-warning |
82 | A_func(ptr, &B_tag); // expected-warning {{this type tag was not designed to be used with this function}} |
83 | C_func(ptr, C_tag); // no-warning |
84 | C_func(ptr, D_tag); // expected-warning {{this type tag was not designed to be used with this function}} |
85 | C_func(ptr, 10); // no-warning |
86 | C_func(ptr, 20); // should warn, but may cause false positives |
87 | } |
88 | |
89 | void test_null_pointer() |
90 | { |
91 | C_func(0, C_tag); // no-warning |
92 | C_func((void *) 0, C_tag); // no-warning |
93 | C_func((int *) 0, C_tag); // no-warning |
94 | C_func((long *) 0, C_tag); // expected-warning {{argument type 'long *' doesn't match specified 'c' type tag that requires 'int *'}} |
95 | } |
96 | |
97 | // Check that we look through typedefs in the special case of allowing 'char' |
98 | // to be matched with 'signed char' or 'unsigned char'. |
99 | void E_func(void *ptr, int tag) __attribute__(( pointer_with_type_tag(e,1,2) )); |
100 | |
101 | typedef char E_char; |
102 | typedef char E_char_2; |
103 | typedef signed char E_char_signed; |
104 | typedef unsigned char E_char_unsigned; |
105 | |
106 | static const int E_tag __attribute__(( type_tag_for_datatype(e,E_char) )) = 10; |
107 | |
108 | void test_char_typedef(char *char_buf, |
109 | E_char_2 *e_char_buf, |
110 | E_char_signed *e_char_signed_buf, |
111 | E_char_unsigned *e_char_unsigned_buf) |
112 | { |
113 | E_func(char_buf, E_tag); |
114 | E_func(e_char_buf, E_tag); |
115 | #ifdef __CHAR_UNSIGNED__ |
116 | E_func(e_char_signed_buf, E_tag); // expected-warning {{argument type 'E_char_signed *' (aka 'signed char *') doesn't match specified 'e' type tag that requires 'E_char *' (aka 'char *')}} |
117 | E_func(e_char_unsigned_buf, E_tag); |
118 | #else |
119 | E_func(e_char_signed_buf, E_tag); |
120 | E_func(e_char_unsigned_buf, E_tag); // expected-warning {{argument type 'E_char_unsigned *' (aka 'unsigned char *') doesn't match specified 'e' type tag that requires 'E_char *' (aka 'char *')}} |
121 | #endif |
122 | } |
123 | |
124 | // Tests for argument_with_type_tag. |
125 | |
126 | #define F_DUPFD 10 |
127 | #define F_SETLK 20 |
128 | |
129 | struct flock { }; |
130 | |
131 | static const int F_DUPFD_tag __attribute__(( type_tag_for_datatype(fcntl,int) )) = F_DUPFD; |
132 | static const int F_SETLK_tag __attribute__(( type_tag_for_datatype(fcntl,struct flock *) )) = F_SETLK; |
133 | |
134 | int fcntl(int fd, int cmd, ...) __attribute__(( argument_with_type_tag(fcntl,3,2) )); |
135 | |
136 | void test_argument_with_type_tag(struct flock *f) |
137 | { |
138 | fcntl(0, F_DUPFD, 10); // no-warning |
139 | fcntl(0, F_SETLK, f); // no-warning |
140 | |
141 | fcntl(0, F_SETLK, 10); // expected-warning {{argument type 'int' doesn't match specified 'fcntl' type tag that requires 'struct flock *'}} |
142 | fcntl(0, F_DUPFD, f); // expected-warning {{argument type 'struct flock *' doesn't match specified 'fcntl' type tag that requires 'int'}} |
143 | } |
144 | |
145 | void test_tag_expresssion(int b) { |
146 | fcntl(0, b ? F_DUPFD : F_SETLK, 10); // no-warning |
147 | fcntl(0, b + F_DUPFD, 10); // no-warning |
148 | fcntl(0, (b, F_DUPFD), 10); // expected-warning {{expression result unused}} |
149 | } |
150 | |
151 | // Check that using 64-bit magic values as tags works and tag values do not |
152 | // overflow internally. |
153 | void F_func(void *ptr, unsigned long long tag) __attribute__((pointer_with_type_tag(f,1,2) )); |
154 | |
155 | static const unsigned long long F_tag1 __attribute__(( type_tag_for_datatype(f,int) )) = 0xFFFFFFFFFFFFFFFFULL; |
156 | static const unsigned long long F_tag2 __attribute__(( type_tag_for_datatype(f,float) )) = 0xFFFFFFFFULL; |
157 | |
158 | void test_64bit_magic(int *int_ptr, float *float_ptr) |
159 | { |
160 | F_func(int_ptr, 0xFFFFFFFFFFFFFFFFULL); |
161 | F_func(int_ptr, 0xFFFFFFFFULL); // expected-warning {{argument type 'int *' doesn't match specified 'f' type tag that requires 'float *'}} |
162 | F_func(float_ptr, 0xFFFFFFFFFFFFFFFFULL); // expected-warning {{argument type 'float *' doesn't match specified 'f' type tag that requires 'int *'}} |
163 | F_func(float_ptr, 0xFFFFFFFFULL); |
164 | } |
165 | |