diff options
Diffstat (limited to 'gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c')
| -rw-r--r-- | gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c b/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c index 895a50e2677..f7bfa35913c 100644 --- a/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c +++ b/gcc/testsuite/c-c++-common/Wsizeof-pointer-memaccess2.c @@ -1,7 +1,7 @@ /* Test -Wsizeof-pointer-memaccess warnings. */ /* { dg-do compile } */ -/* { dg-options "-Wall -O2 -Wno-sizeof-array-argument -ftrack-macro-expansion=0" } */ -/* { dg-options "-Wall -O2 -Wno-sizeof-array-argument -Wno-c++-compat -ftrack-macro-expansion=0" {target c} } */ +/* { dg-options "-Wall -O2 -Wno-sizeof-array-argument -Wno-stringop-truncation -ftrack-macro-expansion=0" } */ +/* { dg-options "-Wall -O2 -Wno-sizeof-array-argument -Wno-stringop-truncation -Wno-c++-compat -ftrack-macro-expansion=0" {target c} } */ /* { dg-require-effective-target alloca } */ #define bos(ptr) __builtin_object_size (ptr, 1) @@ -473,12 +473,15 @@ 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?" } */ } /* { dg-prune-output "\[\n\r\]*writing\[\n\r\]*" } */ |