1 files changed, 96 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/attr-access-read-only.c b/gcc/testsuite/gcc.dg/attr-access-read-only.c
new file mode 100644
index 00000000000..9acd769621e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-access-read-only.c
@@ -0,0 +1,96 @@
+/* PR middle-end/83859 - attribute to establish relation between parameters
+   for buffer and its size
+   Test to verify the handling of attribute access (read_only) syntax.
+   { dg-do compile }
+   { dg-options "-Wall -ftrack-macro-expansion=0" } */
+
+int  __attribute__ ((access))
+access_v (void);       // { dg-error "wrong number of arguments specified for 'access' attribute" }
+
+int  __attribute__ ((access ()))
+access___v (void);     // { dg-error "wrong number of arguments specified for 'access' attribute" }
+
+int  __attribute__ ((access (rdonly)))
+rdonly_spelling (void);   // { dg-error "attribute .access. invalid mode 'rdonly'; expected one of 'read_only', 'read_write', or 'write_only'" }
+
+int  __attribute__ ((access (read_only)))
+rdonly_v_all (void);   // { dg-error "attribute .access\\(read_only\\). missing an argument" }
+
+int  __attribute__ ((access (read_only ())))
+rdonly___v_all (void);   // { dg-error "attribute 'access' unexpected '\\(' after mode 'read_only'; expected a positional argument or '\\)'" }
+// { dg-warning "implicit declaration of function 'read_only'" "" { target *-*-* } .-2 }
+
+
+int rdonly (void);
+
+int  __attribute__ ((access (rdonly ())))
+rdonly___v_all (void);   // { dg-error "attribute 'access' invalid mode 'rdonly'" }
+
+
+int  __attribute__ ((access (read_only)))
+rdonly_i_all (int);   // { dg-error "attribute .access\\(read_only\\). missing an argument" }
+
+#define rdonly       __attribute__ ((access (read_only)))
+#define RDONLY(...)  __attribute__ ((access (read_only, __VA_ARGS__)))
+
+int RDONLY (1)
+rdonly_pcv_1 (const void*);
+int RDONLY (2)
+rdonly_i_pcv_2 (int, const void*);
+int RDONLY (3)
+rdonly_i_i_pcv_3 (int, int, const void*);
+
+int RDONLY (0 + 1)
+rdonly_pcv_0p1 (const void*);
+
+int RDONLY (2 - 1)
+rdonly_pcv_2m1 (const void*);
+
+int RDONLY (1, 1)
+rdonly_pv_pi_1_1 (const void*, const int*);      // { dg-error "attribute 'access\\(read_only, 1, 1\\)' positional argument 2 references non-integer argument type 'const void \\*'" }
+
+int RDONLY (1, 2)
+rdonly_pcv_pc_1_2 (const void*, char*);   // { dg-error "attribute .access\\(read_only, 1, 2\\)' positional argument 2 references non-integer argument type 'char \\*'" }
+
+int RDONLY (2, 1)
+rdonly_pcd_pcv_2_1 (const double*, const void*);   // { dg-error "attribute .access\\(read_only, 2, 1\\)' positional argument 2 references non-integer argument type 'const double \\*'" }
+
+int RDONLY (2, 2)
+rdonly_pi_pcv_2_2 (int*, const void*);   // { dg-error "positional argument 2 references non-integer argument type 'const void \\*'" }
+
+int RDONLY (4)
+rdonly_i_i_i_4 (int, int, int);   // { dg-error "attribute 'access\\(read_only, 4\\)' positional argument 1 value 4 exceeds number of function arguments 3" }
+
+int RDONLY (1)
+rdonly_i_1 (int);   // { dg-error "attribute 'access\\(read_only, 1\\)' positional argument 1 references non-pointer argument type 'int'" }
+
+// It's okay if the pointer argument is non-const, although a separate
+// warning encouraging one might be worthwhile.  Maybe something like
+// -Wsuggest-const.
+int RDONLY (2)
+rdonly_i_pc (int, char*);
+
+int RDONLY (-1)
+rdonly_pcv_m1 (const void*);   // { dg-error "attribute 'access\\(read_only, -1\\)' positional argument 1 invalid value -1" }
+
+int RDONLY (1, -12345)
+rdonly_pcv_i_1_m12345 (const void*, int*);   // { dg-error "attribute 'access\\(read_only, 1, -12345\\)' positional argument 2 invalid value -12345" }
+
+int RDONLY ("blah")
+rdonly_pcv_str (const void*);   // { dg-error "attribute 'access\\(read_only, \"blah\"\\)' invalid positional argument 1" }
+
+int RDONLY (1, "foobar")
+rdonly_pcv_i_1_str (const void*, int);   // { dg-error "attribute 'access\\(read_only, 1, \"foobar\"\\)' invalid positional argument 2" }
+
+// Verify that attributes whose operands reference function pointers
+// are rejected.
+typedef int F (int, int);
+RDONLY (1) void rdwr_pf_1 (F*);   // { dg-error "attribute 'access\\(read_only, 1\\)' positional argument 1 references argument of function type 'F' \\{aka 'int\\(int,  *int\\)'\\}" }
+
+// Verify pointers to functions.
+void RDONLY(2) (*prdonly_pcv2)(int, const void*);
+void RDONLY(3, 1) (*prdonly_pcv2_1)(int, void*, const void*);
+
+// Verify types.
+typedef RDONLY (2) void rdonly_p2_t (const int*, const char*, const void*);
+typedef RDONLY (2) void rdonly_p2_1 (int, const int*);