gdb/testsuite/gdb.base/long_long.c

   1 /* This test script is part of GDB, the GNU debugger.
   2
   3    Copyright 1999-2023 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 /* Test long long expression; test printing in general.
  19  *
  20  * /CLO/BUILD_ENV/Exports/cc -g +e -o long_long long_long.c
  21  *
  22  * or
  23  *
  24  * cc +e +DA2.0 -g -o long_long long_long.c
  25  */
  26
  27 #include <string.h>
  28
  29 enum { MAX_BYTES = 16 };
  30
  31 void
  32 pack (unsigned char b[MAX_BYTES], int size, int nr)
  33 {
  34   static long long val[] = { 0x123456789abcdefLL, 01234567123456701234567LL, 12345678901234567890ULL};
  35   volatile static int e = 1;
  36   int i;
  37   for (i = 0; i < nr; i++)
  38     {
  39       int offset;
  40       if (*(char *)&e)
  41         /* Little endian.  */
  42         offset = sizeof (long long) - size;
  43       else
  44         /* Big endian endian.  */
  45         offset = 0;
  46       memcpy (b + size * i, (char *) val + sizeof (long long) * i + offset, size);
  47     }
  48 }
  49
  50 unsigned char b[MAX_BYTES];
  51 unsigned char h[MAX_BYTES];
  52 unsigned char w[MAX_BYTES];
  53 unsigned char g[MAX_BYTES];
  54
  55 unsigned char c[MAX_BYTES];
  56 unsigned char s[MAX_BYTES];
  57 unsigned char i[MAX_BYTES];
  58 unsigned char l[MAX_BYTES];
  59 unsigned char ll[MAX_BYTES];
  60
  61 int known_types()
  62 {
  63   /* A union is used here as, hopefully it has well defined packing
  64      rules.  */
  65   struct {
  66     long long bin, oct, dec, hex;
  67   } val;
  68   memset (&val, 0, sizeof val);
  69
  70   /* Known values, filling the full 64 bits.  */
  71   val.bin = 0x123456789abcdefLL; /* 64 bits = 16 hex digits */
  72   val.oct = 01234567123456701234567LL; /*  = 21+ octal digits */
  73   val.dec = 12345678901234567890ULL;    /*  = 19+ decimal digits */
  74
  75   /* Stop here and look!  */
  76   val.hex = val.bin - val.dec | val.oct;
  77
  78   return 0;
  79 }
  80
  81 int main() {
  82
  83    /* Pack Byte, Half, Word and Giant arrays with byte-ordered values.
  84       That way "(gdb) x" gives the same output on different
  85       architectures.  */
  86    pack (b, 1, 2);
  87    pack (h, 2, 2);
  88    pack (w, 4, 2);
  89    pack (g, 8, 2);
  90    pack (c, sizeof (char), 2);
  91    pack (s, sizeof (short), 2);
  92    pack (i, sizeof (int), 2);
  93    pack (l, sizeof (long), 2);
  94    pack (ll, sizeof (long long), 2);
  95
  96    known_types();
  97
  98    return 0;
  99 }