IABSD.fr/xenocara/xserver/test/os.c

Branch : - branch - master - tag -

• Show log

  Commit

• Author : matthieu
  Date : 2014-09-27 17:52:59
  Hash : 4f58590a
  Message : Update to xserver 1.16.1. Tested by naddy@, jsg@ & kettenis@

• xserver/test/os.c

• /**
   * Copyright © 2012 Red Hat, Inc.
   *
   *  Permission is hereby granted, free of charge, to any person obtaining a
   *  copy of this software and associated documentation files (the "Software"),
   *  to deal in the Software without restriction, including without limitation
   *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
   *  and/or sell copies of the Software, and to permit persons to whom the
   *  Software is furnished to do so, subject to the following conditions:
   *
   *  The above copyright notice and this permission notice (including the next
   *  paragraph) shall be included in all copies or substantial portions of the
   *  Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   *  DEALINGS IN THE SOFTWARE.
   */
  
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  
  #include <signal.h>
  #include "os.h"
  
  static int last_signal = 0;
  static int expect_signal = 0;
  
  static void sighandler(int signal)
  {
      assert(expect_signal);
      expect_signal = 0;
      if (!last_signal)
          raise(signal);
      OsBlockSignals();
      OsReleaseSignals();
      last_signal = 1;
      expect_signal = 1;
  }
  
  static int
  sig_is_blocked(int sig)
  {
      sigset_t current;
  
      sigemptyset(&current);
      assert(sigprocmask(SIG_BLOCK, NULL, &current) == 0);
      return sigismember(&current, sig);
  }
  
  static void block_sigio_test(void)
  {
  #ifdef SIG_BLOCK
      sigset_t current;
  
      sigemptyset(&current);
      assert(!sig_is_blocked(SIGIO));
  
      /* block once */
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(!sig_is_blocked(SIGIO));
  
      /* block twice, nested */
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(!sig_is_blocked(SIGIO));
  
      /* block all */
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(!sig_is_blocked(SIGIO));
  
      /* block all nested */
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(!sig_is_blocked(SIGIO));
  
      /* mix the two */
      /* ABBA */
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(!sig_is_blocked(SIGIO));
  
      /* ABAB */
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(!sig_is_blocked(SIGIO));
  
      /* BAAB */
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(!sig_is_blocked(SIGIO));
  
      /* BABA */
      OsBlockSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsBlockSignals();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSIGIO();
      assert(sig_is_blocked(SIGIO));
      OsReleaseSignals();
      assert(!sig_is_blocked(SIGIO));
  #endif
  }
  
  static void block_sigio_test_nested(void)
  {
  #ifdef SIG_BLOCK
      /* Check for bug releasing SIGIO during SIGIO signal handling.
         test case:
             raise signal
             → in signal handler:
                  raise signal
                  OsBlockSignals()
                  OsReleaseSignals()
                  tail guard
         tail guard must be hit.
       */
      void (*old_handler)(int);
      old_handler = OsSignal(SIGIO, sighandler);
      expect_signal = 1;
      assert(raise(SIGIO) == 0);
      assert(OsSignal(SIGIO, old_handler) == sighandler);
  #endif
  }
  
  int
  main(int argc, char **argv)
  {
      block_sigio_test();
      block_sigio_test_nested();
      return 0;
  }