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comparison gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess2.C @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children
comparison
equal deleted inserted replaced
111:04ced10e8804 131:84e7813d76e9
1 // Test -Wsizeof-pointer-memaccess warnings. 1 // Test -Wsizeof-pointer-memaccess warnings.
2 // { dg-do compile } 2 // { dg-do compile }
3 // { dg-options "-Wall -Wno-sizeof-array-argument -Wno-stringop-overflow" } 3 // { dg-options "-Wall -Wno-array-bounds -Wno-sizeof-array-argument -Wno-stringop-overflow -Wno-stringop-truncation" }
4 // Test just twice, once with -O0 non-fortified, once with -O2 fortified, 4 // Test just twice, once with -O0 non-fortified, once with -O2 fortified,
5 // suppressing buffer overflow warnings. 5 // suppressing buffer overflow warnings.
6 // { dg-skip-if "" { *-*-* } { "*" } { "-O0" "-O2" } } 6 // { dg-skip-if "" { *-*-* } { "*" } { "-O0" "-O2" } }
7 // { dg-skip-if "" { *-*-* } { "-flto" } { "" } } 7 // { dg-skip-if "" { *-*-* } { "-flto" } { "" } }
8 // { dg-require-effective-target alloca }
8 9
9 extern "C" { 10 extern "C" {
10 11
11 typedef __SIZE_TYPE__ size_t; 12 typedef __SIZE_TYPE__ size_t;
12 extern void *memset (void *, int, size_t); 13 extern void *memset (void *, int, size_t);
701 702
702 strncpy (w, s1, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } 703 strncpy (w, s1, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" }
703 strncat (w, s2, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } 704 strncat (w, s2, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" }
704 stpncpy (w, s1, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } 705 stpncpy (w, s1, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" }
705 706
706 // These are correct, no warning.
707 const char s3[] = "foobarbaz"; 707 const char s3[] = "foobarbaz";
708 const char s4[] = "abcde12345678"; 708 const char s4[] = "abcde12345678";
709 strncpy (x, s3, sizeof (s3)); 709 strncpy (x, s3, sizeof (s3)); // { dg-warning "call is the same expression as the source; did you mean to use the size of the destination" }
710 strncat (x, s4, sizeof (s4)); 710 strncat (x, s4, sizeof (s4)); // { dg-warning "call is the same expression as the source; did you mean to use the size of the destination" }
711 stpncpy (x, s3, sizeof (s3)); 711 stpncpy (x, s3, sizeof (s3)); // { dg-warning "call is the same expression as the source; did you mean to use the size of the destination" }
712
713 // These are safe, no warning.
712 y[1] = strndup (s3, sizeof (s3)); 714 y[1] = strndup (s3, sizeof (s3));
713 z += strncmp (s3, s4, sizeof (s3)); 715 z += strncmp (s3, s4, sizeof (s3));
714 z += strncmp (s3, s4, sizeof (s4)); 716 z += strncmp (s3, s4, sizeof (s4));
715 z += strncasecmp (s3, s4, sizeof (s3)); 717 z += strncasecmp (s3, s4, sizeof (s3));
716 z += strncasecmp (s3, s4, sizeof (s4)); 718 z += strncasecmp (s3, s4, sizeof (s4));