39 lines
868 B
C
39 lines
868 B
C
/* Test whether buffer overflow warnings for __strncat_chk builtin
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are emitted properly. */
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/* { dg-do compile } */
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/* { dg-options "-O2 -std=gnu99" } */
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extern void abort (void);
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#include "../gcc.c-torture/execute/builtins/chk.h"
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char buf1[20];
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char *q;
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void
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test (int arg, ...)
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{
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char *p = &buf1[10];
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*p = 0;
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strncat (p, "abcdefg", 9);
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*p = 0;
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strncat (p, "abcdefghi", 9);
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*p = 0;
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strncat (p, "abcdefghij", 9);
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*p = 0;
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strncat (p, "abcdefghi", 10);
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*p = 0;
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strncat (p, "abcdefghij", 10); /* { dg-warning "will always overflow" } */
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*p = 0;
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strncat (p, "abcdefgh", 11);
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*p = 0;
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strncat (p, "abcdefghijkl", 11); /* { dg-warning "will always overflow" } */
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*p = 0;
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strncat (p, q, 9);
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*p = 0;
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strncat (p, q, 10); /* { dg-warning "might overflow" } */
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*p = 0;
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strncat (p, q, 11); /* { dg-warning "might overflow" } */
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}
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