diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C')
| -rw-r--r-- | gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C b/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C index c72532be4f4..5bc5c4ca859 100644 --- a/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C +++ b/gcc/testsuite/g++.dg/torture/Wsizeof-pointer-memaccess1.C @@ -1,6 +1,6 @@ // Test -Wsizeof-pointer-memaccess warnings. // { dg-do compile } -// { dg-options "-Wall -Wno-sizeof-array-argument -Wno-stringop-overflow" } +// { dg-options "-Wall -Wno-sizeof-array-argument -Wno-stringop-overflow -Wno-stringop-truncation" } // Test just twice, once with -O0 non-fortified, once with -O2 fortified. // { dg-skip-if "" { *-*-* } { "*" } { "-O0" "-O2" } } // { dg-skip-if "" { *-*-* } { "-flto" } { "" } } @@ -698,12 +698,17 @@ f4 (char *x, char **y, int z, char w[64]) strncat (w, s2, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } stpncpy (w, s1, sizeof (w)); // { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } - // These are correct, no warning. const char s3[] = "foobarbaz"; const char s4[] = "abcde12345678"; - strncpy (x, s3, sizeof (s3)); - strncat (x, s4, sizeof (s4)); - stpncpy (x, s3, sizeof (s3)); + + // These are pointless when the destination is large enough, and + // cause overflow otherwise. They might as well be replaced by + // strcpy() or memcpy(). + 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?" } + 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?" } + 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?" } + + // These are safe, no warning. y[1] = strndup (s3, sizeof (s3)); z += strncmp (s3, s4, sizeof (s3)); z += strncmp (s3, s4, sizeof (s4)); |