1  /* Test case for buffer overflow bug in token stringification.
       2     See PR preprocessor/8055 for details.
       3     Reported by Alexander N. Kabaev <ak03@gte.com>.
       4     Test case written by Zack Weinberg <zack@codesourcery.com>.  */
       5  
       6  /* { dg-do preprocess } */
       7  
       8  #define S(x) #x
       9  
      10  /* Fill up one internal buffer with data.  */
      11  S(1234567890123456789012345678901234567890123456789012345678901234567890
      12    1234567890123456789012345678901234567890123456789012345678901234567890
      13    1234567890123456789012345678901234567890123456789012345678901234567890
      14    1234567890123456789012345678901234567890123456789012345678901234567890
      15    1234567890123456789012345678901234567890123456789012345678901234567890
      16    1234567890123456789012345678901234567890123456789012345678901234567890
      17    1234567890123456789012345678901234567890123456789012345678901234567890
      18    1234567890123456789012345678901234567890123456789012345678901234567890
      19    1234567890123456789012345678901234567890123456789012345678901234567890
      20    1234567890123456789012345678901234567890123456789012345678901234567890
      21    1234567890123456789012345678901234567890123456789012345678901234567890
      22    1234567890123456789012345678901234567890123456789012345678901234567890
      23    1234567890123456789012345678901234567890123456789012345678901234567890
      24    1234567890123456789012345678901234567890123456789012345678901234567890
      25    1234567890123456789012345678901234567890123456789012345678901234567890
      26    1234567890123456789012345678901234567890123456789012345678901234567890
      27    1234567890123456789012345678901234567890123456789012345678901234567890
      28    1234567890123456789012345678901234567890123456789012345678901234567890
      29    1234567890123456789012345678901234567890123456789012345678901234567890
      30    1234567890123456789012345678901234567890123456789012345678901234567890
      31    1234567890123456789012345678901234567890123456789012345678901234567890
      32    1234567890123456789012345678901234567890123456789012345678901234567890
      33    1234567890123456789012345678901234567890123456789012345678901234567890
      34    1234567890123456789012345678901234567890123456789012345678901234567890
      35    1234567890123456789012345678901234567890123456789012345678901234567890
      36    1234567890123456789012345678901234567890123456789012345678901234567890
      37    1234567890123456789012345678901234567890123456789012345678901234567890
      38    1234567890123456789012345678901234567890123456789012345678901234567890
      39    1234567890123456789012345678901234567890123456789012345678901234567890
      40    1234567890123456789012345678901234567890123456789012345678901234567890
      41    1234567890123456789012345678901234567890123456789012345678901234567890
      42    1234567890123456789012345678901234567890123456789012345678901234567890
      43    1234567890123456789012345678901234567890123456789012345678901234567890
      44    1234567890123456789012345678901234567890123456789012345678901234567890
      45    1234567890123456789012345678901234567890123456789012345678901234567890
      46    1234567890123456789012345678901234567890123456789012345678901234567890
      47    1234567890123456789012345678901234567890123456789012345678901234567890
      48    1234567890123456789012345678901234567890123456789012345678901234567890
      49    1234567890123456789012345678901234567890123456789012345678901234567890
      50    1234567890123456789012345678901234567890123456789012345678901234567890
      51    1234567890123456789012345678901234567890123456789012345678901234567890
      52    1234567890123456789012345678901234567890123456789012345678901234567890
      53    1234567890123456789012345678901234567890123456789012345678901234567890
      54    1234567890123456789012345678901234567890123456789012345678901234567890
      55    1234567890123456789012345678901234567890123456789012345678901234567890
      56    1234567890123456789012345678901234567890123456789012345678901234567890
      57    1234567890123456789012345678901234567890123456789012345678901234567890
      58    1234567890123456789012345678901234567890123456789012345678901234567890
      59    1234567890123456789012345678901234567890123456789012345678901234567890
      60    1234567890123456789012345678901234567890123456789012345678901234567890
      61    1234567890123456789012345678901234567890123456789012345678901234567890
      62    1234567890123456789012345678901234567890123456789012345678901234567890
      63    12345678901234567890123456789012345678901234567890123456789012345)
      64  
      65  /* When stringify_arg() was called with an empty macro argument, it would
      66     advance the buffer pointer by one but fail to check for running past the
      67     end of the buffer.  We can only know where the end of the buffer is to
      68     within about eight bytes, so do this sixteen times to be sure of hitting
      69     it.  */
      70  
      71  S()
      72  S()
      73  S()
      74  S()
      75  S()
      76  S()
      77  S()
      78  S()
      79  S()
      80  S()
      81  S()
      82  S()
      83  S()
      84  S()
      85  S()
      86  S()
      87  
      88  /* Now allocate more memory in the buffer, which should provoke a crash.  */
      89  
      90  S(abcdefghijklmnopqrstuvwxyz)
      91  S(abcdefghijklmnopqrstuvwxyz)