* gcc.dg/format/attr-2.c, gcc.dg/format/attr-3.c: New tests.

From-SVN: r38824

1 files changed, 78 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/format/attr-3.c b/gcc/testsuite/gcc.dg/format/attr-3.c
new file mode 100644
index 0000000..2e3c632
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/format/attr-3.c
@@ -0,0 +1,78 @@
+/* Test for format attributes: test bad uses of __attribute__.  */
+/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu99 -Wformat" } */
+
+#include "format.h"
+
+/* Proper uses of the attributes.  */
+extern void fa0 (const char *, ...) __attribute__((format(printf, 1, 2)));
+extern void fa1 (char *, ...) __attribute__((format(printf, 1, 2)));
+extern char *fa2 (const char *) __attribute__((format_arg(1)));
+extern char *fa3 (char *) __attribute__((format_arg(1)));
+
+/* Uses with too few or too many arguments.  */
+extern void fb0 (const char *, ...) __attribute__((format)); /* { dg-error "wrong number of arguments" "bad format" } */
+extern void fb1 (const char *, ...) __attribute__((format())); /* { dg-error "wrong number of arguments" "bad format" } */
+extern void fb2 (const char *, ...) __attribute__((format(printf))); /* { dg-error "wrong number of arguments" "bad format" } */
+extern void fb3 (const char *, ...) __attribute__((format(printf, 1))); /* { dg-error "wrong number of arguments" "bad format" } */
+extern void fb4 (const char *, ...) __attribute__((format(printf, 1, 2, 3))); /* { dg-error "wrong number of arguments" "bad format" } */
+
+extern void fc1 (const char *) __attribute__((format_arg)); /* { dg-error "wrong number of arguments" "bad format_arg" } */
+extern void fc2 (const char *) __attribute__((format_arg())); /* { dg-error "wrong number of arguments" "bad format_arg" } */
+extern void fc3 (const char *) __attribute__((format_arg(1, 2))); /* { dg-error "wrong number of arguments" "bad format_arg" } */
+
+/* These attributes presently only apply to declarations, not to types.
+   Eventually, they should be usable with declarators for function types
+   anywhere, but still not with structure/union/enum types.  */
+struct s0 { int i; } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply" "format on struct" } */
+union u0 { int i; } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply" "format on union" } */
+enum e0 { E0V0 } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply" "format on enum" } */
+
+struct s1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply" "format_arg on struct" } */
+union u1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply" "format_arg on union" } */
+enum e1 { E1V0 } __attribute__((format_arg(1))); /* { dg-error "does not apply" "format_arg on enum" } */
+
+/* At present, only functions can be declared with these attributes.
+   Once they can be applied to function types in function pointers, etc.,
+   these tests should be removed, and tests should be added (say in a new
+   testcase attr-<num>.c) that such attributes work and calls through such
+   function pointers (etc.) get checked.  */
+extern void (*fd0) (const char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "non-function" "format on non-function" } */
+extern char *(*fd1) (const char *) __attribute__((format_arg(1))); /* { dg-error "non-function" "format on non-function" } */
+
+/* The format type must be an identifier, one of those recognised.  */
+extern void fe0 (const char *, ...) __attribute__((format(12345, 1, 2))); /* { dg-error "format specifier" "non-id format" } */
+extern void fe1 (const char *, ...) __attribute__((format(nosuch, 1, 2))); /* { dg-warning "format function type" "unknown format" } */
+
+/* Both the numbers must be integer constant expressions.  */
+extern void ff0 (const char *, ...) __attribute__((format(printf, 3-2, (long long)(10/5))));
+int foo;
+extern void ff1 (const char *, ...) __attribute__((format(printf, foo, 10/5))); /* { dg-error "invalid operand" "bad number" } */
+extern void ff2 (const char *, ...) __attribute__((format(printf, 3-2, foo))); /* { dg-error "invalid operand" "bad number" } */
+extern char *ff3 (const char *) __attribute__((format_arg(3-2)));
+extern char *ff4 (const char *) __attribute__((format_arg(foo))); /* { dg-error "invalid operand" "bad format_arg number" } */
+
+/* The format string argument must precede the arguments to be formatted.
+   This includes if no parameter types are specified (which is not valid ISO
+   C for variadic functions).  */
+extern void fg0 () __attribute__((format(printf, 1, 2)));
+extern void fg1 () __attribute__((format(printf, 1, 0)));
+extern void fg2 () __attribute__((format(printf, 1, 1))); /* { dg-error "follows" "bad number order" } */
+extern void fg3 () __attribute__((format(printf, 2, 1))); /* { dg-error "follows" "bad number order" } */
+
+/* The format string argument must be a string type, and the arguments to
+   be formatted must be the "...".  */
+extern void fh0 (int, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "format int string" } */
+extern void fh1 (signed char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "signed char string" } */
+extern void fh2 (unsigned char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "unsigned char string" } */
+extern void fh3 (const char *, ...) __attribute__((format(printf, 1, 3))); /* { dg-error "is not" "not ..." } */
+extern void fh4 (const char *, int, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "is not" "not ..." } */
+
+/* format_arg formats must take and return a string.  */
+extern char *fi0 (int) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg int string" } */
+extern char *fi1 (signed char *) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg signed char string" } */
+extern char *fi2 (unsigned char *) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg unsigned char string" } */
+extern int fi3 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret int string" } */
+extern signed char *fi4 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret signed char string" } */
+extern unsigned char *fi5 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret unsigned char string" } */