gcc/testsuite/gcc.dg/analyzer/strndup-1.c

   1 /* { dg-skip-if "no strndup in libc" { *-*-darwin[789]* *-*-darwin10* hppa*-*-hpux* *-*-mingw* *-*-vxworks* } } */
   2
   3 #include <string.h>
   4 #include <stdlib.h>
   5
   6 extern void requires_nonnull (void *ptr)
   7   __attribute__((nonnull));
   8
   9 void test_1 (const char *s)
  10 {
  11   char *p = strndup (s, 42); /* { dg-message "allocated here" } */
  12 } /* { dg-warning "leak of 'p'" } */
  13
  14 void test_2 (const char *s)
  15 {
  16   char *p = strndup (s, 42);
  17   free (p);
  18 }
  19 void test_3 (const char *s)
  20 {
  21   char *p = strndup (s, 42); /* { dg-message "this call could return NULL" } */
  22   requires_nonnull (p); /* { dg-warning "use of possibly-NULL 'p'" } */
  23 }