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Added warning flag for null derefs

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This commit is contained in:
Bruce Hill 2021-05-31 10:32:48 -07:00
parent aa1faea83c
commit 0443fbb063
2 changed files with 3 additions and 2 deletions
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2
Makefile
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@ -3,7 +3,7 @@ CC=cc
PREFIX=/usr/local
SYSCONFDIR=/etc
CFLAGS=-std=c99 -Werror -D_XOPEN_SOURCE=700 -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L
CWARN=-Wall -Wpedantic -Wextra -Wsign-conversion -Wtype-limits -Wunused-result
CWARN=-Wall -Wpedantic -Wextra -Wsign-conversion -Wtype-limits -Wunused-result -Wnull-dereference
EXTRA=
G=
O=-O3

3
match.c
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@ -52,9 +52,10 @@ static match_t *match(def_t *defs, file_t *f, const char *str, pat_t *pat, bool
// If the given pattern is a reference, look it up and return the referenced
// pattern. This is used for an optimization to avoid repeated lookups.
//
__attribute__((nonnull, returns_nonnull))
static inline pat_t *deref(def_t *defs, pat_t *pat)
{
if (pat && pat->type == BP_REF) {
if (pat->type == BP_REF) {
def_t *def = lookup(defs, pat->args.ref.len, pat->args.ref.name);
if (def) pat = def->pat;
}