gdb/testsuite/gdb.base/long_long.c

   1 /* This test script is part of GDB, the GNU debugger.
   2
   3    Copyright 1999-2013 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17    */
  18
  19 /* Test long long expression; test printing in general.
  20  *
  21  * /CLO/BUILD_ENV/Exports/cc -g +e -o long_long long_long.c
  22  *
  23  * or
  24  *
  25  * cc +e +DA2.0 -g -o long_long long_long.c
  26  */
  27
  28 #include <string.h>
  29
  30 enum { MAX_BYTES = 16 };
  31
  32 void
  33 pack (unsigned char b[MAX_BYTES], int size, int nr)
  34 {
  35   static long long val[] = { 0x123456789abcdefLL, 01234567123456701234567LL, 12345678901234567890ULL};
  36   volatile static int e = 1;
  37   int i;
  38   for (i = 0; i < nr; i++)
  39     {
  40       int offset;
  41       if (*(char *)&e)
  42         /* Little endian.  */
  43         offset = sizeof (long long) - size;
  44       else
  45         /* Big endian endian.  */
  46         offset = 0;
  47       memcpy (b + size * i, (char *) val + sizeof (long long) * i + offset, size);
  48     }
  49 }
  50
  51 unsigned char b[MAX_BYTES];
  52 unsigned char h[MAX_BYTES];
  53 unsigned char w[MAX_BYTES];
  54 unsigned char g[MAX_BYTES];
  55
  56 unsigned char c[MAX_BYTES];
  57 unsigned char s[MAX_BYTES];
  58 unsigned char i[MAX_BYTES];
  59 unsigned char l[MAX_BYTES];
  60 unsigned char ll[MAX_BYTES];
  61
  62 int known_types()
  63 {
  64   /* A union is used here as, hopefully it has well defined packing
  65      rules.  */
  66   struct {
  67     long long bin, oct, dec, hex;
  68   } val;
  69   memset (&val, 0, sizeof val);
  70
  71   /* Known values, filling the full 64 bits.  */
  72   val.bin = 0x123456789abcdefLL; /* 64 bits = 16 hex digits */
  73   val.oct = 01234567123456701234567LL; /*  = 21+ octal digits */
  74   val.dec = 12345678901234567890ULL;    /*  = 19+ decimal digits */
  75
  76   /* Stop here and look!  */
  77   val.hex = val.bin - val.dec | val.oct;
  78
  79   return 0;
  80 }
  81
  82 int main() {
  83
  84    /* Pack Byte, Half, Word and Giant arrays with byte-orderd values.
  85       That way "(gdb) x" gives the same output on different
  86       architectures.  */
  87    pack (b, 1, 2);
  88    pack (h, 2, 2);
  89    pack (w, 4, 2);
  90    pack (g, 8, 2);
  91    pack (c, sizeof (char), 2);
  92    pack (s, sizeof (short), 2);
  93    pack (i, sizeof (int), 2);
  94    pack (l, sizeof (long), 2);
  95    pack (ll, sizeof (long long), 2);
  96
  97    known_types();
  98
  99    return 0;
 100 }