gcc/testsuite/gcc.dg/tree-prof/val-profiler-threads-1.c

   1 /* { dg-options "-O0 -pthread -fprofile-update=atomic" } */
   2 /* { dg-require-effective-target profile_update_atomic } */
   3
   4 #include <pthread.h>
   5
   6 #define NUM_THREADS     8
   7 #define SIZE 1024
   8 #define ITERATIONS (1000 * 1000)
   9
  10 char buffer[SIZE];
  11 char buffer2[SIZE];
  12
  13 void *copy_memory(char *dst, char *src, unsigned size)
  14 {
  15    for (unsigned i = 0; i < ITERATIONS; i++)
  16    {
  17      dst[size % 10] = src[size % 20];
  18    }
  19 }
  20
  21 void *foo(void *d)
  22 {
  23   copy_memory (buffer, buffer2, SIZE);
  24 }
  25
  26 int main(int argc, char *argv[])
  27 {
  28    pthread_t threads[NUM_THREADS];
  29    int rc;
  30    long t;
  31    for(t=0;t<NUM_THREADS;t++){
  32      rc = pthread_create(&threads[t], NULL, foo, 0);
  33      if (rc){
  34          return 1;
  35        }
  36      }
  37
  38    int retval;
  39    for(t=0;t<NUM_THREADS;t++)
  40      pthread_join (threads[t], (void**)&retval);
  41
  42    return buffer[10];
  43 }