gcc/testsuite/gcc.dg/simulate-thread/strict-align-global.c

   1 /* { dg-do link } */
   2 /* { dg-final { simulate-thread } } */
   3
   4 #include <stdio.h>
   5 #include "simulate-thread.h"
   6
   7 /* This test verifies writes to globals do not write to adjacent
   8    globals.  This mostly happens on strict-align targets that are not
   9    byte addressable (old Alphas, etc).  */
  10
  11 char a = 0;
  12 char b = 77;
  13
  14 void simulate_thread_other_threads()
  15 {
  16 }
  17
  18 int simulate_thread_step_verify()
  19 {
  20   if (b != 77)
  21     {
  22       printf("FAIL: Unexpected value.  <b> is %d, should be 77\n", b);
  23       return 1;
  24     }
  25   return 0;
  26 }
  27
  28 /* Verify that every variable has the correct value.  */
  29 int simulate_thread_final_verify()
  30 {
  31   int ret = simulate_thread_step_verify ();
  32   if (a != 66)
  33     {
  34       printf("FAIL: Unexpected value.  <a> is %d, should be 66\n", a);
  35       return 1;
  36     }
  37   return ret;
  38 }
  39
  40 __attribute__((noinline))
  41 void simulate_thread_main()
  42 {
  43   a = 66;
  44 }
  45
  46 int main ()
  47 {
  48   simulate_thread_main();
  49   simulate_thread_done();
  50   return 0;
  51 }