diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c b/gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c index f9bc57c4e86..cd9dc72decb 100644 --- a/gcc/testsuite/gcc.dg/torture/Wsizeof-pointer-memaccess1.c +++ b/gcc/testsuite/gcc.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" } { "" } } */ @@ -704,12 +704,17 @@ 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. */ + /* These are pointless when the destination is large enough, and + cause overflow otherwise. If the copies are guaranteed to be + safe the calls might as well be replaced by strcat(), strcpy(), + or memcpy(). */ const char s3[] = "foobarbaz"; const char s4[] = "abcde12345678"; - strncpy (x, s3, sizeof (s3)); - strncat (x, s4, sizeof (s4)); - stpncpy (x, s3, sizeof (s3)); + 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 correct, no warning. */ y[1] = strndup (s3, sizeof (s3)); z += strncmp (s3, s4, sizeof (s3)); z += strncmp (s3, s4, sizeof (s4)); |