xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.arch/amd64-tailcall-self.c (revision bdc22b2e01993381dcefeff2bc9b56ca75a4235c)
1 /* This testcase is part of GDB, the GNU debugger.
2 
3    Copyright 2015-2016 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 __attribute__((noinline,noclone)) static void b(void) {
19   asm volatile("");
20 }
21 
22 int i;
23 
24 __attribute__((noinline,noclone)) int c(int q) {
25   return q+1;
26 }
27 
28 __attribute__((noinline,noclone)) void a(int q) {
29   asm volatile("nop;nop;nop"::"g"(q):"memory");
30   if (i>=1&&i<=10) {
31     i|=1;
32     a(i);
33   } else if (i==0)
34     b();
35 }
36 
37 int main(int argc,char **argv) {
38   a(argc);
39   return 0;
40 }
41