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|
// $Id$
// ============================================================================
//
// = LIBRARY
// examples
//
// = FILENAME
// deadlock_detection_test.cpp
//
// = DESCRIPTION
//
// = AUTHOR
// Tim Harrison
//
// ============================================================================
#include "ace/Token_Manager.h"
#include "ace/Remote_Tokens.h"
#include "ace/Thread.h"
#include "ace/Thread_Manager.h"
#include "ace/Get_Opt.h"
#include "ace/Token_Invariants.h"
#if defined (ACE_HAS_THREADS) && defined (ACE_HAS_THREADS_LIBRARY)
ACE_RCSID(deadlock, deadlock_detection_test, "$Id$")
typedef ACE_Token_Invariant_Manager ACE_TOKEN_INVARIANTS;
static ACE_Token_Proxy *global_mutex;
struct Two_Tokens
{
public:
Two_Tokens (ACE_Thread_Manager *tm): thr_mgr_ (tm) {}
ACE_Token_Proxy *first_;
ACE_Token_Proxy *second_;
ACE_Thread_Manager *thr_mgr_;
};
struct Four_Tokens
{
public:
Four_Tokens (ACE_Thread_Manager *tm): thr_mgr_ (tm) {}
ACE_Token_Proxy *first1_;
ACE_Token_Proxy *first2_;
ACE_Token_Proxy *first3_;
ACE_Token_Proxy *second_;
ACE_Thread_Manager *thr_mgr_;
};
static int ignore_deadlock = 0;
static int remote_mutexes = 0;
static const char *server_host = ACE_DEFAULT_SERVER_HOST;
static int server_port = ACE_DEFAULT_SERVER_PORT;
static int iterations = 100;
static int rwlocks = 0;
static void *
two_token_thread (void *vp)
{
Two_Tokens* tm = (Two_Tokens *) vp;
for (int x = 0; x < iterations; x++)
{
if (tm->first_->acquire () == -1)
{
ACE_DEBUG ((LM_DEBUG, "Deadlock detected\n"));
continue;
}
if (ACE_TOKEN_INVARIANTS::instance ()->acquired (tm->first_) == 0)
{
tm->first_->dump ();
ACE_ERROR_RETURN ((LM_ERROR, "violated invariant.\n"), 0);
}
if (tm->second_->acquire () == -1)
{
ACE_DEBUG ((LM_DEBUG, "Deadlock Detected\n"));
goto G1;
}
if (ACE_TOKEN_INVARIANTS::instance ()->acquired (tm->second_) == 0)
{
tm->second_->dump ();
ACE_ERROR_RETURN ((LM_ERROR, "violated invariant.\n"), 0);
}
ACE_TOKEN_INVARIANTS::instance ()->releasing (tm->second_);
tm->second_->release ();
G1:
ACE_TOKEN_INVARIANTS::instance ()->releasing (tm->first_);
tm->first_->release ();
}
ACE_DEBUG ((LM_DEBUG, "thread %t exiting\n"));
return 0;
}
static void *
run_writer (void *vp)
{
Four_Tokens *ft = (Four_Tokens *) vp;
int acquire_number = 0;
for (int x = 0; x < iterations; x++)
{
// Cycle through each of the first three tokens.
ACE_Token_Proxy *t = 0;
switch (acquire_number)
{
case 0:
t = ft->first1_;
break;
case 1:
t = ft->first2_;
break;
case 2:
t = ft->first3_;
break;
}
acquire_number = (acquire_number + 1) % 3;
if (t->acquire () == -1)
{
ACE_ASSERT (errno == EDEADLK);
ACE_DEBUG ((LM_DEBUG, "Deadlock detected.\n"));
continue;
}
if (ACE_TOKEN_INVARIANTS::instance ()->acquired (t) == 0)
{
t->dump ();
ACE_ERROR_RETURN ((LM_ERROR, "violated invariant.\n"), 0);
}
if (ft->second_->acquire () == -1)
{
ACE_ASSERT (errno == EDEADLK);
ACE_DEBUG ((LM_DEBUG, "Deadlock Detected..\n"));
goto G1;
}
if (ACE_TOKEN_INVARIANTS::instance ()->acquired (ft->second_) == 0)
{
ft->second_->dump ();
ACE_ERROR_RETURN ((LM_ERROR, "violated invariant.\n"), 0);
}
ACE_TOKEN_INVARIANTS::instance ()->releasing (ft->second_);
ft->second_->release ();
G1:
ACE_TOKEN_INVARIANTS::instance ()->releasing (t);
t->release ();
}
ACE_DEBUG ((LM_DEBUG, "thread %t exiting\n"));
return 0;
}
static int
parse_args (int argc, char *argv[])
{
ACE_LOG_MSG->open (argv[0]);
ACE_Get_Arg_Opt get_opt (argc, argv, "iuh:rp:n:", 1);
for (int c; (c = get_opt ()) != -1; )
{
switch (c)
{
case 'r':
rwlocks = 1;
break;
case 'i':
ignore_deadlock = 1;
break;
case 'h':
server_host = get_opt.opt_arg ();
remote_mutexes = 1;
break;
case 'p':
server_port = ACE_OS::atoi (get_opt.opt_arg ());
remote_mutexes = 1;
break;
case 'n':
iterations = ACE_OS::atoi (get_opt.opt_arg ());
break;
case 'u':
default:
ACE_ERROR_RETURN ((LM_ERROR,
"%n:\n"
"[-r test readers/writer locks]\n"
"[-n <iterations>]\n"
"[-h <remote host>]\n"
"[-p <remote port>]\n"
"[-i ignore deadlock]\n%a", 1), -1);
}
}
return 0;
}
int
mutex_test (void)
{
ACE_Thread_Manager thr_mgr;
Two_Tokens one (&thr_mgr);
Two_Tokens two (&thr_mgr);
if (remote_mutexes == 0)
{
global_mutex = new ACE_Local_Mutex ("global proxy", ignore_deadlock, 1);
one.first_ = new ACE_Local_Mutex ("local proxy", ignore_deadlock, 1);
two.second_ = new ACE_Local_Mutex ("local proxy", ignore_deadlock, 1);
}
else
{
ACE_Remote_Mutex::set_server_address (ACE_INET_Addr (server_port, server_host));
global_mutex = new ACE_Remote_Mutex ("global proxy", ignore_deadlock, 1);
one.first_ = new ACE_Remote_Mutex ("local proxy", ignore_deadlock, 1);
two.second_ = new ACE_Remote_Mutex ("local proxy", ignore_deadlock, 1);
}
one.second_ = global_mutex;
two.first_ = global_mutex;
// Tell the token manager to be verbose when reporting deadlock.
ACE_Token_Manager::instance ()->debug (1);
if (thr_mgr.spawn (ACE_THR_FUNC (two_token_thread),
(void *) &one, THR_BOUND) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "first spawn"), -1);
if (thr_mgr.spawn (ACE_THR_FUNC (two_token_thread),
(void *) &two, THR_BOUND) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "second spawn"), -1);
// Wait for all threads to exit.
thr_mgr.wait ();
return 0;
}
static int
rwlock_test (void)
{
ACE_Thread_Manager thr_mgr;
Two_Tokens reader1 (&thr_mgr);
Two_Tokens reader2 (&thr_mgr);
Two_Tokens reader3 (&thr_mgr);
Four_Tokens writer (&thr_mgr);
if (remote_mutexes == 0)
{
reader1.first_ = new ACE_Local_RLock ("reader first", ignore_deadlock, 1);
reader1.second_ = new ACE_Local_RLock ("writer first 1", ignore_deadlock, 1);
reader2.first_ = new ACE_Local_RLock ("reader first", ignore_deadlock, 1);
reader2.second_ = new ACE_Local_RLock ("writer first 2", ignore_deadlock, 1);
reader3.first_ = new ACE_Local_RLock ("reader first", ignore_deadlock, 1);
reader3.second_ = new ACE_Local_RLock ("writer first 3", ignore_deadlock, 1);
writer.first1_ = new ACE_Local_WLock ("writer first 1", ignore_deadlock, 1);
writer.first2_ = new ACE_Local_WLock ("writer first 2", ignore_deadlock, 1);
writer.first3_ = new ACE_Local_WLock ("writer first 3", ignore_deadlock, 1);
writer.second_ = new ACE_Local_WLock ("reader first", ignore_deadlock, 1);
}
else
{
ACE_Remote_Mutex::set_server_address (ACE_INET_Addr (server_port, server_host));
reader1.first_ = new ACE_Remote_RLock ("writer first 1", ignore_deadlock, 1);
reader1.second_ = new ACE_Remote_RLock ("reader first", ignore_deadlock, 1);
reader2.first_ = new ACE_Remote_RLock ("writer first 2", ignore_deadlock, 1);
reader2.second_ = new ACE_Remote_RLock ("reader first", ignore_deadlock, 1);
reader3.first_ = new ACE_Remote_RLock ("writer first 3", ignore_deadlock, 1);
reader3.second_ = new ACE_Remote_RLock ("reader first", ignore_deadlock, 1);
writer.first1_ = new ACE_Remote_WLock ("writer first 1", ignore_deadlock, 1);
writer.first2_ = new ACE_Remote_WLock ("writer first 2", ignore_deadlock, 1);
writer.first3_ = new ACE_Remote_WLock ("writer first 3", ignore_deadlock, 1);
writer.second_ = new ACE_Remote_WLock ("reader first", ignore_deadlock, 1);
}
// Tell the token manager to be verbose when reporting deadlock.
ACE_Token_Manager::instance ()->debug (1);
if (thr_mgr.spawn (ACE_THR_FUNC (two_token_thread),
(void *) &reader1, THR_BOUND) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "first spawn"), -1);
if (thr_mgr.spawn (ACE_THR_FUNC (two_token_thread),
(void *) &reader2, THR_BOUND) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "first spawn"), -1);
if (thr_mgr.spawn (ACE_THR_FUNC (two_token_thread),
(void *) &reader3, THR_BOUND) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "first spawn"), -1);
if (thr_mgr.spawn (ACE_THR_FUNC (run_writer),
(void *) &writer, THR_BOUND) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "second spawn"), -1);
// Wait for all threads to exit.
thr_mgr.wait ();
return 0;
}
int
ACE_TMAIN (int argc, ACE_TCHAR* argv[])
{
if (parse_args (argc, argv) == -1)
return -1;
if (rwlocks)
rwlock_test ();
else
mutex_test ();
ACE_DEBUG ((LM_DEBUG, "test exiting.\n"));
return 0;
}
#else
int
ACE_TMAIN (int, ACE_TCHAR *[])
{
ACE_ERROR_RETURN ((LM_ERROR,
"threads not supported on this platform\n"), -1);
}
#endif /* ACE_HAS_THREADS */
|
