pthreads.c

gdb-6.0 linux 下的调试工具

#include <stdio.h>
#include <pthread.h>

/* Under OSF 2.0 & 3.0 and HPUX 10, the second arg of pthread_create
   is prototyped to be just a "pthread_attr_t", while under Solaris it
   is a "pthread_attr_t *".  Arg! */

#if defined (__osf__) || defined (__hpux__)
#define PTHREAD_CREATE_ARG2(arg) arg
#define PTHREAD_CREATE_NULL_ARG2 null_attr
static pthread_attr_t null_attr;
#else
#define PTHREAD_CREATE_ARG2(arg) &arg
#define PTHREAD_CREATE_NULL_ARG2 NULL
#endif

static int verbose = 0;

static void
common_routine (arg)
     int arg;
{
  static int from_thread1;
  static int from_thread2;
  static int from_main;
  static int hits;
  static int full_coverage;

  if (verbose) printf("common_routine (%d)\n", arg);
  hits++;
  switch (arg)
    {
    case 0:
      from_main++;
      break;
    case 1:
      from_thread1++;
      break;
    case 2:
      from_thread2++;
      break;
    }
  if (from_main && from_thread1 && from_thread2)
    full_coverage = 1;
}

static void *
thread1 (void *arg)
{
  int i;
  int z = 0;

  if (verbose) printf ("thread1 (%0x) ; pid = %d\n", arg, getpid ());
  for (i=1; i <= 10000000; i++)
    {
      if (verbose) printf("thread1 %d\n", pthread_self ());
      z += i;
      common_routine (1);
      sleep(1);
    }
  return (void *) 0;
}

static void *
thread2 (void * arg)
{
  int i;
  int k = 0;

  if (verbose) printf ("thread2 (%0x) ; pid = %d\n", arg, getpid ());
  for (i=1; i <= 10000000; i++)
    {
      if (verbose) printf("thread2 %d\n", pthread_self ());
      k += i;
      common_routine (2);
      sleep(1);
    }
  sleep(100);
  return (void *) 0;
}

void
foo (a, b, c)
     int a, b, c;
{
  int d, e, f;

  if (verbose) printf("a=%d\n", a);
}

main(argc, argv)
     int argc;
     char **argv;
{
  pthread_t tid1, tid2;
  int j;
  int t = 0;
  void (*xxx) ();
  pthread_attr_t attr;

  if (verbose) printf ("pid = %d\n", getpid());

  foo (1, 2, 3);

#ifndef __osf__
  if (pthread_attr_init (&attr))
    {
      perror ("pthread_attr_init 1");
      exit (1);
    }
#endif

#ifdef PTHREAD_SCOPE_SYSTEM
  if (pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM))
    {
      perror ("pthread_attr_setscope 1");
      exit (1);
    }
#endif

  if (pthread_create (&tid1, PTHREAD_CREATE_ARG2(attr), thread1, (void *) 0xfeedface))
    {
      perror ("pthread_create 1");
      exit (1);
    }
  if (verbose) printf ("Made thread %d\n", tid1);
  sleep (1);

  if (pthread_create (&tid2, PTHREAD_CREATE_NULL_ARG2, thread2, (void *) 0xdeadbeef))
    {
      perror ("pthread_create 2");
      exit (1);
    }
  if (verbose) printf("Made thread %d\n", tid2);

  sleep (1);

  for (j = 1; j <= 10000000; j++)
    {
      if (verbose) printf("top %d\n", pthread_self ());
      common_routine (0);
      sleep(1);
      t += j;
    }
  
  exit(0);
}