gcc/testsuite/c-c++-common/analyzer/sprintf-concat.c

   1 typedef __SIZE_TYPE__ size_t;
   2 #include "../../gcc.dg/analyzer/analyzer-decls.h"
   3
   4 extern size_t
   5 strlen(const char* __s) __attribute__((__nothrow__, __leaf__))
   6 __attribute__((__pure__)) __attribute__((__nonnull__(1)));
   7
   8 extern void*
   9 malloc(size_t __size) __attribute__((__nothrow__, __leaf__))
  10 __attribute__((__malloc__)) __attribute__((__alloc_size__(1)));
  11
  12 extern int
  13 sprintf(char* __restrict __s, const char* __restrict, ...)
  14   __attribute__((__nothrow__));
  15
  16 char *
  17 test_1 (const char *a, const char *b)
  18 {
  19   size_t sz = strlen (a) + strlen (b) + 2;
  20   char *p = (char *) malloc (sz);
  21   if (!p)
  22     return NULL;
  23   sprintf (p, "%s/%s", a, b);
  24   return p;
  25 }
  26
  27 void
  28 test_2 (const char *a, const char *b)
  29 {
  30   size_t sz = strlen (a) + strlen (b) + 2;
  31   char *p = (char *) malloc (sz); /* { dg-message "allocated here" } */
  32   if (!p)
  33     return;
  34   sprintf (p, "%s/%s", a, b); /* { dg-warning "leak of 'p' " } */
  35 }