gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-20.c

   1 /* PR tree-optimization/87034 - missing -Wformat-overflow on a sprintf
   2    %s with a wide string.  */
   3 /* { dg-do compile } */
   4 /* { dg-require-effective-target 4byte_wchar_t } */
   5 /* { dg-options "-O2 -Wall -Wformat-overflow -ftrack-macro-expansion=0" } */
   6
   7 typedef __WCHAR_TYPE__ wchar_t;
   8
   9 extern int sprintf (char*, const char*, ...);
  10
  11 struct S
  12 {
  13   char a[1];
  14   void (*pf)(void);
  15 };
  16
  17 void test (struct S *p)
  18 {
  19   const char *q = sizeof (wchar_t) == 2
  20     ? (char*)L"\x4142\x4344" : (char*)L"\x41424344\x45464748";
  21
  22   sprintf (p->a, "%s", q);   /* { dg-warning "\\\[-Wformat-overflow" "pr87034" { xfail *-*-*} } */
  23 }