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* gcc.c-torture/execute/va-arg-21.c: New test.

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From-SVN: r37167
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Kaveh R. Ghazi 2000-10-31 21:30:22 +00:00 • committed by Kaveh Ghazi
parent 7e08e19030
commit c5a0835dea
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gcc/testsuite/ChangeLog
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2000-10-31 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* gcc.c-torture/execute/va-arg-21.c: New test.
2000-10-31 Joseph S. Myers <jsm28@cam.ac.uk>
* gcc.dg/c99-complex-2.c: New test.

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gcc/testsuite/gcc.c-torture/execute/va-arg-21.c Normal file
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/* Copyright (C) 2000 Free Software Foundation.
If the argument to va_end() has side effects, test whether side
effects from that argument are honored.
Written by Kaveh R. Ghazi, 10/31/2000. */
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef __GNUC__
#define __attribute__(x)
#endif
static void __attribute__ ((__format__ (__printf__, 1, 2)))
doit (const char *s, ...)
{
va_list *ap_array[3], **ap_ptr = ap_array;
ap_array[0] = malloc (sizeof(va_list));
ap_array[1] = NULL;
ap_array[2] = malloc (sizeof(va_list));
va_start (*ap_array[0], s);
vprintf (s, **ap_ptr);
/* Increment the va_list pointer once. */
va_end (**ap_ptr++);
/* Increment the va_list pointer a second time. */
ap_ptr++;
va_start (*ap_array[2], s);
/* If we failed to increment ap_ptr twice, then the parameter passed
in here will dereference NULL and should cause a crash. */
vprintf (s, **ap_ptr);
va_end (**ap_ptr);
/* Just in case, If *ap_ptr is NULL abort anyway. */
if (*ap_ptr == 0)
abort();
}
int main()
{
doit ("%s", "hello world\n");
return 0;
}