gdb/testsuite/gdb.trace/trace-mt.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2012-2013 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 #include <pthread.h>
  19
  20 #ifdef SYMBOL_PREFIX
  21 #define SYMBOL(str)     SYMBOL_PREFIX #str
  22 #else
  23 #define SYMBOL(str)     #str
  24 #endif
  25 /* Called from asm.  */
  26 static void __attribute__((used))
  27 func (void)
  28 {}
  29
  30 static void *
  31 thread_function(void *arg)
  32 {
  33   /* `set_point1' is the label at which to set a fast tracepoint.  The
  34      insn at the label must be large enough to fit a fast tracepoint
  35      jump.  */
  36   asm ("    .global " SYMBOL(set_point1) "\n"
  37        SYMBOL(set_point1) ":\n"
  38 #if (defined __x86_64__ || defined __i386__)
  39        "    call " SYMBOL(func) "\n"
  40 #endif
  41        );
  42 }
  43
  44 static void
  45 end (void)
  46 {}
  47
  48 int
  49 main (int argc, char *argv[], char *envp[])
  50 {
  51   pthread_t threads[2];
  52   int i;
  53
  54   for (i = 0; i < 2; i++)
  55     pthread_create (&threads[i], NULL, thread_function, NULL);
  56
  57   for (i = 0; i < 2; i++)
  58     pthread_join (threads[i], NULL);
  59
  60   end ();
  61
  62   return 0;
  63 }