/*********************************************************************** * sighand.c * * Copyright (C) 2007 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name Gregory Nutt nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ***********************************************************************/ #include #include #include #include #include #include #include #include #include "ostest.h" #ifndef NULL # define NULL (void*)0 #endif #define WAKEUP_SIGNAL 17 #define SIGVALUE_INT 42 static sem_t sem; static boolean sigreceived = FALSE; static boolean threadexited = FALSE; static void wakeup_action(int signo, siginfo_t *info, void *ucontext) { sigset_t oldset; sigset_t allsigs; int status; printf("%s: Received signal %d\n", __FUNCTION__, signo); sigreceived = TRUE; /* Check signo */ if (signo != WAKEUP_SIGNAL) { printf("%s: ERROR expected signo=%d\n", __FUNCTION__, WAKEUP_SIGNAL); } /* Check siginfo */ if (info->si_value.sival_int != SIGVALUE_INT) { printf("%s: ERROR sival_int=%d expected %d\n", __FUNCTION__, info->si_value.sival_int, SIGVALUE_INT); } else { printf("%s: sival_int=%d\n", __FUNCTION__, info->si_value.sival_int); } if (info->si_signo != WAKEUP_SIGNAL) { printf("%s: ERROR expected si_signo=%d, got=%d\n", __FUNCTION__, WAKEUP_SIGNAL, info->si_signo); } printf("%s: si_code=%d\n", __FUNCTION__, info->si_code); /* Check ucontext_t */ printf("%s: ucontext=%p\n", __FUNCTION__, ucontext); /* Check sigprocmask */ (void)sigfillset(&allsigs); status = sigprocmask(SIG_SETMASK, NULL, &oldset); if (status != OK) { printf("%s: ERROR sigprocmask failed, status=%d\n", __FUNCTION__, status); } if (oldset != allsigs) { printf("%s: ERROR sigprocmask=%x expected=%x\n", __FUNCTION__, oldset, allsigs); } } static int waiter_main(int argc, char *argv[]) { sigset_t sigset; struct sigaction act; struct sigaction oact; int status; printf("%s: Waiter started\n", __FUNCTION__); printf("%s: Unmasking signal %d\n", __FUNCTION__, WAKEUP_SIGNAL); (void)sigemptyset(&sigset); (void)sigaddset(&sigset, WAKEUP_SIGNAL); status = sigprocmask(SIG_UNBLOCK, &sigset, NULL); if (status != OK) { printf("%s: ERROR sigprocmask failed, status=%d\n", __FUNCTION__, status); } printf("%s: Registering signal handler\n", __FUNCTION__); act.sa_sigaction = wakeup_action; act.sa_flags = SA_SIGINFO; (void)sigfillset(&act.sa_mask); (void)sigdelset(&act.sa_mask, WAKEUP_SIGNAL); status = sigaction(WAKEUP_SIGNAL, &act, &oact); if (status != OK) { printf("%s: ERROR sigaction failed, status=%d\n", __FUNCTION__, status); } printf("%s: oact.sigaction=%p oact.sa_flags=%x oact.sa_mask=%x\n", __FUNCTION__, oact.sa_sigaction, oact.sa_flags, oact.sa_mask); /* Take the semaphore */ printf("%s: Waiting on semaphore\n", __FUNCTION__); fflush(stdout); status = sem_wait(&sem); if (status != 0) { int error = *get_errno_ptr(); if (error == EINTR) { printf("%s: sem_wait() successfully interrupted by signal\n", __FUNCTION__); } else { printf("%s: ERROR sem_wait failed, errno=%d\n", __FUNCTION__, error); } } else { printf("%s: ERROR awakened with no error!\n", __FUNCTION__); } printf("%s: done\n", __FUNCTION__); fflush(stdout); threadexited = TRUE; return 0; } void sighand_test(void) { struct sched_param param; union sigval sigvalue; pid_t waiterpid; int policy; int status; printf("%s: Initializing semaphore to 0\n", __FUNCTION__); sem_init(&sem, 0, 0); /* Start waiter thread */ printf("%s: Starting waiter task\n", __FUNCTION__); status = sched_getparam (0, ¶m); if (status != OK) { printf("%s: ERROR sched_getparam() failed\n", __FUNCTION__); param.sched_priority = PTHREAD_DEFAULT_PRIORITY; } policy = sched_getscheduler(0); if (policy == ERROR) { printf("%s: ERROR sched_getscheduler() failed\n", __FUNCTION__); policy = SCHED_FIFO; } waiterpid = task_create("waiter", param.sched_priority, PTHREAD_STACK_DEFAULT, waiter_main, 0, 0, 0, 0); if (waiterpid == ERROR) { printf("%s: ERROR failed to start waiter_main\n", __FUNCTION__); } else { printf("%s: Started waiter_main pid=%d\n", __FUNCTION__, waiterpid); } /* Wait a bit */ fflush(stdout); usleep(500*1000); /* Then signal the waiter thread. */ sigvalue.sival_int = SIGVALUE_INT; status = sigqueue(waiterpid, WAKEUP_SIGNAL, sigvalue); if (status != OK) { printf("%s: ERROR sigqueue failed\n", __FUNCTION__); task_delete(waiterpid); } /* Wait a bit */ fflush(stdout); usleep(500*1000); /* Then check the result */ if (!threadexited) { printf("%s: ERROR waiter task did not exit\n", __FUNCTION__); } if (!sigreceived) { printf("%s: ERROR signal handler did not run\n", __FUNCTION__); } printf("%s: done\n", __FUNCTION__); fflush(stdout); }