gcc/testsuite/gcc.dg/Wstringop-overflow-8.c

   1 /* PR tree-optimization/79220 - missing -Wstringop-overflow= on a memcpy
   2    overflow with a small power-of-2 size
   3    { dg-do compile }
   4    { dg-options "-O2 -Wno-array-bounds -Wstringop-overflow" } */
   5
   6 extern void* memcpy (void*, const void*, __SIZE_TYPE__);
   7 extern void* memmove (void*, const void*, __SIZE_TYPE__);
   8 extern void* memset (void*, int, __SIZE_TYPE__);
   9
  10 char d[1];
  11
  12 void test_memcpy_lit_2 (void)
  13 {
  14   memcpy (d, "01", 2);          /* { dg-warning "\\\[-Wstringop-overflow" } */
  15 }
  16
  17 void test_memcpy_lit_4 (void)
  18 {
  19   memcpy (d, "0123", 4);        /* { dg-warning "\\\[-Wstringop-overflow" } */
  20 }
  21
  22 void test_memmove_lit_8 (void)
  23 {
  24   memmove (d, "01234567", 8);   /* { dg-warning "\\\[-Wstringop-overflow" } */
  25 }
  26
  27
  28 void test_memcpy_ptr_2 (const void *s)
  29 {
  30   memcpy (d, s, 2);             /* { dg-warning "\\\[-Wstringop-overflow" } */
  31 }
  32
  33 void test_memcpy_ptr_4 (const void *s)
  34 {
  35   memcpy (d, s, 4);             /* { dg-warning "\\\[-Wstringop-overflow" } */
  36 }
  37
  38 void test_memcpy_ptr_8 (const void *s)
  39 {
  40   memcpy (d, s, 8);             /* { dg-warning "\\\[-Wstringop-overflow" } */
  41 }
  42
  43
  44 void test_memmove_ptr (const void *s)
  45 {
  46   memmove (d, s, 8);            /* { dg-warning "\\\[-Wstringop-overflow" } */
  47 }
  48
  49 void test_memset_2 (void)
  50 {
  51   memset (d, 0, 2);             /* { dg-warning "\\\[-Wstringop-overflow" } */
  52 }
  53
  54 void test_memset_4 (void)
  55 {
  56   memset (d, 0, 4);             /* { dg-warning "\\\[-Wstringop-overflow" } */
  57 }
  58
  59 void test_memset_8 (void)
  60 {
  61   memset (d, 0, 8);             /* { dg-warning "\\\[-Wstringop-overflow" } */
  62 }