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annotate gcc/testsuite/gcc.dg/Wstringop-overflow-31.c @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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145
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1 /* PR middle-end/93646 - confusing -Wstringop-truncation on strncat where
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2 -Wstringop-overflow is expected
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3 { dg-do compile }
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4 { dg-options "-O2 -Wall" } */
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5
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6 extern __SIZE_TYPE__ strlen (const char*);
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7 extern char* strncat (char*, const char*, __SIZE_TYPE__);
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8
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9
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10 char a[4];
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11
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12
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13 void f0 (char *d, const char *s)
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14 {
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15 strncat (d, s, strlen (s)); // { dg-warning "specified bound depends on the length of the source argument" }
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16 /* { dg-message "function 'f0'.*inlined from 'f1'" "inlining stack" { target *-*-* } 0 } */
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17
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18 // Prevent f0 from being replaced by g0.
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19 *d = 'f';
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20 }
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21
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22 void f1 (const char *s)
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23 {
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24 f0 (a, s);
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25 }
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26
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27
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28 static void g0 (char *d, const char *s)
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29 {
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30 strncat (d, s, strlen (s)); // { dg-warning "specified bound 3 equals source length" }
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31 /* { dg-message "function 'g0'.*inlined from 'g1'" "inlining stack" { target *-*-* } 0 } */
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32
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33 // Prevent g0 from being replaced by f0.
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34 *d = 'g';
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35 }
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36
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37 void g1 (void)
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38 {
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39 g0 (a, "123");
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40 }