clang/docs/analyzer/checkers/unix_api_example.c

   1
   2 // Currently the check is performed for apple targets only.
   3 void test(const char *path) {
   4   int fd = open(path, O_CREAT);
   5     // warn: call to 'open' requires a third argument when the
   6     // 'O_CREAT' flag is set
   7 }
   8
   9 void f();
  10
  11 void test() {
  12   pthread_once_t pred = {0x30B1BCBA, {0}};
  13   pthread_once(&pred, f);
  14     // warn: call to 'pthread_once' uses the local variable
  15 }
  16
  17 void test() {
  18   void *p = malloc(0); // warn: allocation size of 0 bytes
  19 }
  20
  21 void test() {
  22   void *p = calloc(0, 42); // warn: allocation size of 0 bytes
  23 }
  24
  25 void test() {
  26   void *p = malloc(1);
  27   p = realloc(p, 0); // warn: allocation size of 0 bytes
  28 }
  29
  30 void test() {
  31   void *p = alloca(0); // warn: allocation size of 0 bytes
  32 }
  33
  34 void test() {
  35   void *p = valloc(0); // warn: allocation size of 0 bytes
  36 }
  37