123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
/* { dg-do run } */
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/* { dg-options "-O2" } */
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#include <stdarg.h>
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extern int error_open_missing_mode (void)
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__attribute__((__error__ ("open with O_CREAT needs 3 arguments, only 2 were given")));
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extern int warn_open_too_many_arguments (void)
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__attribute__((__warning__ ("open called with more than 3 arguments")));
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extern void abort (void);
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char expected_char;
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__attribute__((noinline)) int
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myopen2 (const char *path, int oflag)
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{
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if (expected_char++ != path[0] || path[1] != '\0')
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abort ();
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switch (path[0])
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{
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case 'f':
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if (oflag != 0x2)
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abort ();
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break;
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case 'g':
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if (oflag != 0x43)
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abort ();
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/* In real __open_2 this would terminate the program:
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open with O_CREAT without third argument. */
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return -6;
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default:
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abort ();
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}
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return 0;
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}
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__attribute__((noinline)) int
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myopenva (const char *path, int oflag, ...)
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{
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int mode = 0;
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va_list ap;
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if ((oflag & 0x40) != 0)
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{
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va_start (ap, oflag);
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mode = va_arg (ap, int);
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va_end (ap);
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}
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if (expected_char++ != path[0] || path[1] != '\0')
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abort ();
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switch (path[0])
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{
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case 'a':
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if (oflag != 0x43 || mode != 0644)
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abort ();
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break;
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case 'b':
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if (oflag != 0x3)
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abort ();
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break;
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case 'c':
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if (oflag != 0x2)
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abort ();
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break;
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case 'd':
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if (oflag != 0x43 || mode != 0600)
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abort ();
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break;
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case 'e':
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if (oflag != 0x3)
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abort ();
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break;
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default:
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abort ();
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}
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return 0;
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}
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extern inline __attribute__((always_inline, gnu_inline)) int
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myopen (const char *path, int oflag, ...)
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{
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if (__builtin_va_arg_pack_len () > 1)
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warn_open_too_many_arguments ();
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if (__builtin_constant_p (oflag))
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{
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if ((oflag & 0x40) != 0 && __builtin_va_arg_pack_len () < 1)
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{
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error_open_missing_mode ();
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return myopen2 (path, oflag);
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}
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return myopenva (path, oflag, __builtin_va_arg_pack ());
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}
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if (__builtin_va_arg_pack_len () < 1)
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return myopen2 (path, oflag);
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return myopenva (path, oflag, __builtin_va_arg_pack ());
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}
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volatile int l0;
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int
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main (void)
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{
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expected_char = 'a';
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if (myopen ("a", 0x43, 0644))
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abort ();
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if (myopen ("b", 0x3, 0755))
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abort ();
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if (myopen ("c", 0x2))
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abort ();
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if (myopen ("d", l0 + 0x43, 0600))
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abort ();
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if (myopen ("e", l0 + 0x3, 0700))
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abort ();
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if (myopen ("f", l0 + 0x2))
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abort ();
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/* Invalid use of myopen, but only detectable at runtime. */
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if (myopen ("g", l0 + 0x43) != -6)
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abort ();
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return 0;
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}
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