senf/Scheduler/Scheduler.test.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2006
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief Scheduler unit tests */
  25
  26 //#include "Scheduler.test.hh"
  27 //#include "Scheduler.test.ih"
  28
  29 // Custom includes
  30 #include <sys/types.h>
  31 #include <signal.h>
  32 #include <sys/wait.h>
  33 #include <unistd.h>
  34 #include <sys/socket.h>
  35 #include <sys/un.h>
  36 #include <errno.h>
  37 #include <string.h>
  38 #include <iostream>
  39 #include <boost/bind.hpp>
  40
  41 #include "Scheduler.hh"
  42
  43 #include "../Utils/auto_unit_test.hh"
  44 #include <boost/test/test_tools.hpp>
  45
  46 #define prefix_
  47 ///////////////////////////////cc.p////////////////////////////////////////
  48
  49 namespace {
  50
  51     char const * SOCK_PATH = "/tmp/sched_test.sock";
  52
  53     void error(char const * fn, char const * proc="")
  54     {
  55         std::cerr << "\n" << proc << fn << ": " << strerror(errno) << std::endl;
  56     }
  57
  58     void fail(char const * fn)
  59     {
  60         error(fn,"server: ");
  61         _exit(1);
  62     }
  63
  64     void server()
  65     {
  66         int sock = socket(PF_UNIX,SOCK_STREAM,0);
  67         if (sock<0) fail("socket");
  68         struct sockaddr_un sun;
  69         memset(&sun,0,sizeof(sun));
  70         sun.sun_family = AF_UNIX;
  71         strcpy(sun.sun_path,SOCK_PATH);
  72         if (bind(sock,(struct sockaddr*)&sun,sizeof(sun))<0) fail("bind");
  73         if (listen(sock,1)<0) fail("listen");
  74         int conn = accept(sock,0,0);
  75         if (conn < 0) fail("accept");
  76
  77         ///////////////////////////////////////////////////////////////////////////
  78
  79         if (write(conn,"READ",4)<0) fail("write");
  80         char buffer[1024];
  81         int size =  read(conn,buffer,1024);
  82         if (size<0) fail("read");
  83         if (size == 5) {
  84             buffer[5] = 0;
  85             if (strcmp(buffer,"WRITE")==0) {
  86                 if (write(conn,"OK",2)<0) fail("write");
  87             } else
  88                 if (write(conn,"FAIL",4)<0) fail("write");
  89         } else
  90             if (write(conn,"FAIL",4)<0) fail("write");
  91
  92         ///////////////////////////////////////////////////////////////////////////
  93
  94         close(conn);
  95         close(sock);
  96     }
  97
  98     int start_server()
  99     {
 100         unlink(SOCK_PATH);
 101         int pid = fork();
 102         if (pid == 0) {
 103             signal(SIGCHLD, SIG_IGN);
 104             server();
 105             _exit(0);
 106         }
 107         if (pid < 0) {
 108             error("fork");
 109             return 0;
 110         }
 111         signal(SIGCHLD, SIG_DFL);
 112
 113         sleep(1); // Wait for the server socket to be opened
 114         return pid;
 115     }
 116
 117     bool stop_server(int pid)
 118     {
 119         sleep(1); // Wait for the server to terminate
 120         if (kill(pid,SIGTERM)<0) {
 121             error("kill");
 122             return false;
 123         }
 124         int status = 0;
 125         if (waitpid(pid,&status,0)<0) {
 126             error("waitpid");
 127             return false;
 128         }
 129         unlink(SOCK_PATH);
 130         if (WIFSIGNALED(status)) {
 131             std::cerr << "\nserver terminated with signal " << WTERMSIG(status) << std::endl;
 132             return false;
 133         }
 134         if (WEXITSTATUS(status)!=0) {
 135             std::cerr << "\nserver terminated with exit status " << WEXITSTATUS(status) << std::endl;
 136             return false;
 137         }
 138         return true;
 139     }
 140
 141     char buffer[1024];
 142     int size;
 143     int event;
 144
 145     void callback(int fd, int ev)
 146     {
 147         event = ev;
 148         switch (event & senf::scheduler::FdEvent::EV_ALL) {
 149         case senf::scheduler::FdEvent::EV_READ:
 150             size = recv(fd,buffer,1024,0);
 151             break;
 152         case senf::scheduler::FdEvent::EV_PRIO:
 153             size = recv(fd,buffer,1024,MSG_OOB);
 154             break;
 155         case senf::scheduler::FdEvent::EV_WRITE:
 156             size = write(fd,buffer,size);
 157             break;
 158         }
 159         senf::scheduler::terminate();
 160     }
 161
 162     bool timeoutCalled = false;
 163     void timeout()
 164     {
 165         timeoutCalled = true;
 166         senf::scheduler::terminate();
 167     }
 168
 169     struct HandleWrapper
 170     {
 171         HandleWrapper(int fd,std::string const & tag) : fd_(fd), tag_(tag) {}
 172         int fd_;
 173         std::string tag_;
 174     };
 175
 176     int retrieve_filehandle(HandleWrapper const & handle)
 177     {
 178         return handle.fd_;
 179     }
 180
 181     void handleCallback(HandleWrapper const & handle, int event)
 182     {
 183         if (handle.tag_ != "TheTag")
 184             return;
 185         callback(handle.fd_,event);
 186     }
 187
 188     bool is_close(senf::ClockService::clock_type a, senf::ClockService::clock_type b)
 189     {
 190         return (a<b ? b-a : a-b) < senf::ClockService::milliseconds(100);
 191     }
 192
 193     senf::ClockService::clock_type sigtime (0);
 194
 195     void sigusr(siginfo_t const &)
 196     {
 197         sigtime = senf::ClockService::now();
 198         senf::scheduler::terminate();
 199     }
 200
 201     void delay(unsigned long milliseconds)
 202     {
 203         struct timespec ts;
 204         ts.tv_sec = milliseconds / 1000;
 205         ts.tv_nsec = (milliseconds % 1000) * 1000000;
 206         while (nanosleep(&ts,&ts) < 0 && errno == EINTR) ;
 207     }
 208
 209     void blockingHandler()
 210     {
 211         delay(2200);
 212         senf::scheduler::terminate();
 213     }
 214
 215     unsigned eventCount (0);
 216
 217     void eventeventhandler()
 218     {
 219         ++ eventCount;
 220     }
 221 }
 222
 223 void schedulerTest()
 224 {
 225     int pid = start_server();
 226     BOOST_REQUIRE (pid);
 227
 228     int sock = socket(PF_UNIX,SOCK_STREAM,0);
 229     if (sock<0) {
 230         error("socket");
 231         BOOST_FAIL("socket");
 232     }
 233     struct sockaddr_un sun;
 234     memset(&sun,0,sizeof(sun));
 235     sun.sun_family = AF_UNIX;
 236     strcpy(sun.sun_path,SOCK_PATH);
 237
 238     if (connect(sock,(struct sockaddr*)&sun,sizeof(sun))<0) {
 239         error("connect");
 240         BOOST_FAIL("connect");
 241     }
 242
 243     ///////////////////////////////////////////////////////////////////////////
 244
 245     senf::scheduler::EventHook evev ("eventCounter", eventeventhandler,
 246                                      senf::scheduler::EventHook::PRE);
 247
 248     {
 249         senf::scheduler::FdEvent fde1 ("testFdEvent", boost::bind(&callback, sock, _1),
 250                                       sock, senf::scheduler::FdEvent::EV_READ);
 251         event = senf::scheduler::FdEvent::EV_NONE;
 252         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 253         BOOST_CHECK_EQUAL( event, senf::scheduler::FdEvent::EV_READ );
 254         BOOST_REQUIRE_EQUAL( size, 4 );
 255         buffer[size]=0;
 256         BOOST_CHECK_EQUAL( buffer, "READ" );
 257
 258         HandleWrapper handle(sock,"TheTag");
 259         senf::scheduler::FdEvent fde2 ("testFdEvent", boost::bind(&handleCallback,handle,_1),
 260                                       handle, senf::scheduler::FdEvent::EV_WRITE);
 261         strcpy(buffer,"WRITE");
 262         size=5;
 263         event = senf::scheduler::FdEvent::EV_NONE;
 264         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 265         BOOST_CHECK_EQUAL( event, senf::scheduler::FdEvent::EV_WRITE );
 266
 267         SENF_CHECK_NO_THROW( fde2.disable() );
 268         event = senf::scheduler::FdEvent::EV_NONE;
 269         sleep(1);
 270         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 271         BOOST_CHECK_EQUAL( event, senf::scheduler::FdEvent::EV_READ|senf::scheduler::FdEvent::EV_HUP );
 272         BOOST_REQUIRE_EQUAL( size, 2 );
 273         buffer[size]=0;
 274         BOOST_CHECK_EQUAL( buffer, "OK" );
 275     }
 276
 277     {
 278         senf::scheduler::TimerEvent timer1 ("testTimer1", &timeout,
 279                                             senf::ClockService::now()+senf::ClockService::milliseconds(200));
 280         senf::scheduler::TimerEvent timer2 ("testTimer2", &timeout,
 281                                             senf::ClockService::now()+senf::ClockService::milliseconds(400));
 282
 283         event = senf::scheduler::FdEvent::EV_NONE;
 284         senf::ClockService::clock_type t (senf::ClockService::now());
 285         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 286         BOOST_CHECK_PREDICATE( is_close, (senf::ClockService::now()-t) (senf::ClockService::milliseconds(200)) );
 287         BOOST_CHECK( timeoutCalled );
 288         BOOST_CHECK( ! timer1.enabled() );
 289         BOOST_CHECK_EQUAL( event, senf::scheduler::FdEvent::EV_NONE );
 290         BOOST_CHECK_PREDICATE( is_close, (senf::ClockService::now()) (senf::scheduler::eventTime()) );
 291         timeoutCalled = false;
 292         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 293         BOOST_CHECK_PREDICATE( is_close, (senf::ClockService::now()-t) (senf::ClockService::milliseconds(400)) );
 294         BOOST_CHECK( timeoutCalled );
 295         BOOST_CHECK_EQUAL( event, senf::scheduler::FdEvent::EV_NONE );
 296         BOOST_CHECK( ! timer2.enabled() );
 297
 298         BOOST_MESSAGE( "A 'Scheduler task hanging' error is expected to be signaled here." );
 299         SENF_CHECK_NO_THROW( timer1.action(&blockingHandler) );
 300         SENF_CHECK_NO_THROW( timer1.timeout(senf::ClockService::now()) );
 301         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 302         BOOST_CHECK_EQUAL( senf::scheduler::watchdogEvents(), 1u );
 303     }
 304
 305     {
 306         senf::scheduler::TimerEvent timer ("testWatchdog", &timeout,
 307                                            senf::ClockService::now()+senf::ClockService::milliseconds(400));
 308         senf::scheduler::SignalEvent sig (SIGUSR1, &sigusr);
 309
 310         senf::ClockService::clock_type t = senf::ClockService::now();
 311         ::kill(::getpid(), SIGUSR1);
 312         delay(200);
 313         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 314         BOOST_CHECK_PREDICATE( is_close, (senf::ClockService::now()) (t+senf::ClockService::milliseconds(200)) );
 315         BOOST_CHECK_PREDICATE( is_close, (sigtime) (t+senf::ClockService::milliseconds(200)) );
 316         SENF_CHECK_NO_THROW( senf::scheduler::process() );
 317     }
 318
 319     BOOST_CHECK( eventCount >= 8u );
 320
 321
 322     ///////////////////////////////////////////////////////////////////////////
 323
 324     close(sock);
 325
 326     BOOST_CHECK (stop_server(pid));
 327 }
 328
 329 BOOST_AUTO_UNIT_TEST(testSchedulerPollTimers)
 330 {
 331     BOOST_CHECK( ! senf::scheduler::usingHiresTimers() );
 332     schedulerTest();
 333 }
 334
 335 BOOST_AUTO_UNIT_TEST(testSchedulerHiresTimers)
 336 {
 337     if (senf::scheduler::haveScalableHiresTimers())
 338         BOOST_MESSAGE( "Using timerfd() hires timers" );
 339     else
 340         BOOST_MESSAGE( "Using POSIX hires timers");
 341     SENF_CHECK_NO_THROW( senf::scheduler::hiresTimers() );
 342     BOOST_CHECK( senf::scheduler::usingHiresTimers() );
 343     schedulerTest();
 344     SENF_CHECK_NO_THROW( senf::scheduler::loresTimers() );
 345     BOOST_CHECK( ! senf::scheduler::usingHiresTimers() );
 346 }
 347
 348 BOOST_AUTO_UNIT_TEST(testSchedulerPOSIXTimers)
 349 {
 350     if (senf::scheduler::haveScalableHiresTimers()) {
 351         SENF_CHECK_NO_THROW( senf::scheduler::detail::TimerDispatcher::instance().timerSource(
 352                                  std::auto_ptr<senf::scheduler::detail::TimerSource>(
 353                                      new senf::scheduler::detail::POSIXTimerSource())) );
 354         schedulerTest();
 355         senf::scheduler::loresTimers();
 356     }
 357 }
 358
 359 namespace {
 360
 361     void sigme()
 362     {
 363         senf::scheduler::BlockSignals signalBlocker;
 364         signalBlocker.block();
 365         signalBlocker.unblock();
 366         BOOST_CHECK( ! signalBlocker.blocked() );
 367         signalBlocker.unblock();
 368         signalBlocker.block();
 369         BOOST_CHECK( signalBlocker.blocked() );
 370         ::kill(::getpid(), SIGUSR1);
 371         delay(200);
 372     }
 373
 374 }
 375
 376 BOOST_AUTO_UNIT_TEST(blockSignals)
 377 {
 378     senf::scheduler::TimerEvent signaler ("sigme", &sigme, senf::ClockService::now());
 379     senf::scheduler::TimerEvent timer (
 380         "testWatchdog", &timeout, senf::ClockService::now()+senf::ClockService::milliseconds(400));
 381     senf::scheduler::SignalEvent sig (SIGUSR1, &sigusr);
 382
 383     senf::ClockService::clock_type t = senf::ClockService::now();
 384     SENF_CHECK_NO_THROW( senf::scheduler::process() );
 385
 386     BOOST_CHECK_PREDICATE( is_close,
 387                            (senf::ClockService::now())
 388                            (t+senf::ClockService::milliseconds(200)) );
 389     BOOST_CHECK_PREDICATE( is_close, (sigtime) (t+senf::ClockService::milliseconds(200)) );
 390
 391     SENF_CHECK_NO_THROW( senf::scheduler::process() );
 392 }
 393
 394 ///////////////////////////////cc.e////////////////////////////////////////
 395 #undef prefix_
 396
 397 \f
 398 // Local Variables:
 399 // mode: c++
 400 // fill-column: 100
 401 // c-file-style: "senf"
 402 // indent-tabs-mode: nil
 403 // ispell-local-dictionary: "american"
 404 // compile-command: "scons -u test"
 405 // comment-column: 40
 406 // End: