diff options
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index e9548dc..09cb949 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -3119,6 +3119,15 @@ check_format_types (status, types) if (TREE_CODE (cur_type) == ERROR_MARK) break; + /* Check for writing through a NULL pointer. */ + if (types->writing_in_flag + && i == 0 + && cur_param != 0 + && integer_zerop (cur_param)) + status_warning (status, + "writing through null pointer (arg %d)", + arg_num); + if (cur_param != 0 && TREE_CODE (cur_param) == ADDR_EXPR) cur_param = TREE_OPERAND (cur_param, 0); else |