161 lines
7.2 KiB
C
161 lines
7.2 KiB
C
// RUN: %clang_cc1 -std=c99 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -x c++ -std=c++98 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -std=c99 -fno-signed-char -fsyntax-only -verify %s
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struct A {};
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typedef struct A *MPI_Datatype;
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int wrong1(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag )); // expected-error {{'pointer_with_type_tag' attribute requires parameter 1 to be an identifier}}
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int wrong2(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,0,7) )); // expected-error {{attribute parameter 2 is out of bounds}}
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int wrong3(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,3,7) )); // expected-error {{attribute parameter 2 is out of bounds}}
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int wrong4(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,1,0) )); // expected-error {{attribute parameter 3 is out of bounds}}
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int wrong5(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,1,3) )); // expected-error {{attribute parameter 3 is out of bounds}}
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int wrong6(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,0x8000000000000001ULL,1) )); // expected-error {{attribute parameter 2 is out of bounds}}
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extern int x;
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int wrong7(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,x,2) )); // expected-error {{attribute requires parameter 2 to be an integer constant}}
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int wrong8(void *buf, MPI_Datatype datatype)
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__attribute__(( pointer_with_type_tag(mpi,1,x) )); // expected-error {{attribute requires parameter 3 to be an integer constant}}
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int wrong9 __attribute__(( pointer_with_type_tag(mpi,1,2) )); // expected-error {{attribute only applies to functions and methods}}
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int wrong10(double buf, MPI_Datatype type)
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__attribute__(( pointer_with_type_tag(mpi,1,2) )); // expected-error {{'pointer_with_type_tag' attribute only applies to pointer arguments}}
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extern struct A datatype_wrong1
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__attribute__(( type_tag_for_datatype )); // expected-error {{'type_tag_for_datatype' attribute requires parameter 1 to be an identifier}}
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extern struct A datatype_wrong2
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__attribute__(( type_tag_for_datatype(mpi,1,2) )); // expected-error {{expected a type}}
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extern struct A datatype_wrong3
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__attribute__(( type_tag_for_datatype(mpi,not_a_type) )); // expected-error {{unknown type name 'not_a_type'}}
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extern struct A datatype_wrong4
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__attribute__(( type_tag_for_datatype(mpi,int,int) )); // expected-error {{expected identifier}}
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extern struct A datatype_wrong5
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__attribute__(( type_tag_for_datatype(mpi,int,not_a_flag) )); // expected-error {{invalid comparison flag 'not_a_flag'}}
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extern struct A datatype_wrong6
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__attribute__(( type_tag_for_datatype(mpi,int,layout_compatible,not_a_flag) )); // expected-error {{invalid comparison flag 'not_a_flag'}}
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void datatype_wrong7(void) __attribute__((type_tag_for_datatype(datatype_wrong7, int))); // expected-error {{'type_tag_for_datatype' attribute only applies to variables}}
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// Using a tag with kind A in a place where the function requires kind B should
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// warn.
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void A_func(void *ptr, void *tag) __attribute__(( pointer_with_type_tag(a,1,2) ));
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extern struct A A_tag __attribute__(( type_tag_for_datatype(a,int) ));
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extern struct A B_tag __attribute__(( type_tag_for_datatype(b,int) ));
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void C_func(void *ptr, int tag) __attribute__(( pointer_with_type_tag(c,1,2) ));
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static const int C_tag __attribute__(( type_tag_for_datatype(c,int) )) = 10;
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static const int D_tag __attribute__(( type_tag_for_datatype(d,int) )) = 20;
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void test_tag_mismatch(int *ptr)
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{
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A_func(ptr, &A_tag); // no-warning
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A_func(ptr, &B_tag); // expected-warning {{this type tag was not designed to be used with this function}}
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C_func(ptr, C_tag); // no-warning
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C_func(ptr, D_tag); // expected-warning {{this type tag was not designed to be used with this function}}
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C_func(ptr, 10); // no-warning
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C_func(ptr, 20); // should warn, but may cause false positives
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}
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void test_null_pointer()
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{
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C_func(0, C_tag); // no-warning
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C_func((void *) 0, C_tag); // no-warning
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C_func((int *) 0, C_tag); // no-warning
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C_func((long *) 0, C_tag); // expected-warning {{argument type 'long *' doesn't match specified 'c' type tag that requires 'int *'}}
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}
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// Check that we look through typedefs in the special case of allowing 'char'
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// to be matched with 'signed char' or 'unsigned char'.
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void E_func(void *ptr, int tag) __attribute__(( pointer_with_type_tag(e,1,2) ));
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typedef char E_char;
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typedef char E_char_2;
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typedef signed char E_char_signed;
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typedef unsigned char E_char_unsigned;
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static const int E_tag __attribute__(( type_tag_for_datatype(e,E_char) )) = 10;
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void test_char_typedef(char *char_buf,
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E_char_2 *e_char_buf,
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E_char_signed *e_char_signed_buf,
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E_char_unsigned *e_char_unsigned_buf)
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{
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E_func(char_buf, E_tag);
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E_func(e_char_buf, E_tag);
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#ifdef __CHAR_UNSIGNED__
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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 *')}}
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E_func(e_char_unsigned_buf, E_tag);
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#else
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E_func(e_char_signed_buf, E_tag);
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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 *')}}
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#endif
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}
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// Tests for argument_with_type_tag.
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#define F_DUPFD 10
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#define F_SETLK 20
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struct flock { };
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static const int F_DUPFD_tag __attribute__(( type_tag_for_datatype(fcntl,int) )) = F_DUPFD;
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static const int F_SETLK_tag __attribute__(( type_tag_for_datatype(fcntl,struct flock *) )) = F_SETLK;
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int fcntl(int fd, int cmd, ...) __attribute__(( argument_with_type_tag(fcntl,3,2) ));
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void test_argument_with_type_tag(struct flock *f)
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{
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fcntl(0, F_DUPFD, 10); // no-warning
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fcntl(0, F_SETLK, f); // no-warning
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fcntl(0, F_SETLK, 10); // expected-warning {{argument type 'int' doesn't match specified 'fcntl' type tag that requires 'struct flock *'}}
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fcntl(0, F_DUPFD, f); // expected-warning {{argument type 'struct flock *' doesn't match specified 'fcntl' type tag that requires 'int'}}
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}
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void test_tag_expresssion(int b) {
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fcntl(0, b ? F_DUPFD : F_SETLK, 10); // no-warning
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fcntl(0, b + F_DUPFD, 10); // no-warning
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fcntl(0, (b, F_DUPFD), 10); // expected-warning {{expression result unused}}
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}
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// Check that using 64-bit magic values as tags works and tag values do not
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// overflow internally.
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void F_func(void *ptr, unsigned long long tag) __attribute__((pointer_with_type_tag(f,1,2) ));
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static const unsigned long long F_tag1 __attribute__(( type_tag_for_datatype(f,int) )) = 0xFFFFFFFFFFFFFFFFULL;
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static const unsigned long long F_tag2 __attribute__(( type_tag_for_datatype(f,float) )) = 0xFFFFFFFFULL;
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void test_64bit_magic(int *int_ptr, float *float_ptr)
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{
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F_func(int_ptr, 0xFFFFFFFFFFFFFFFFULL);
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F_func(int_ptr, 0xFFFFFFFFULL); // expected-warning {{argument type 'int *' doesn't match specified 'f' type tag that requires 'float *'}}
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F_func(float_ptr, 0xFFFFFFFFFFFFFFFFULL); // expected-warning {{argument type 'float *' doesn't match specified 'f' type tag that requires 'int *'}}
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F_func(float_ptr, 0xFFFFFFFFULL);
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}
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