gdb/testsuite/gdb.base/c-linkage-name.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2018-2020 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 struct wrapper
  19 {
  20   int a;
  21 };
  22
  23 /* Create a global variable whose name in the assembly code
  24    (aka the "linkage name") is different from the name in
  25    the source code.  The goal is to create a symbol described
  26    in DWARF using a DW_AT_linkage_name attribute, with a name
  27    which follows the C++ mangling.
  28
  29    In this particular case, we chose "symada__cS" which, if it were
  30    demangled, would translate to "symada (char, signed)".  */
  31 struct wrapper mundane asm ("symada__cS") = {0x060287af};
  32
  33 void
  34 do_something (struct wrapper *w)
  35 {
  36   w->a++;
  37 }
  38
  39 int
  40 main (void)
  41 {
  42   do_something (&mundane);
  43   return 0;
  44 }