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317 lines
8.3 KiB
317 lines
8.3 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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/*! @file
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* This test checks that after Pin detaches from the application :
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* - the signal mask was restored correctly
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* - the application handlers were restored and they are called
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*
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* This test also check this case:
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* - Blocking some signal on all threads.
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* Sending a signal (will be a pending signal).
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* Detach Pin.
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* Unblock signal in a specific thread.
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* Make sure application received that signal in the thread mentioned above after the detach completed.
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*/
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#include <assert.h>
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#include <mach/mach.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <signal.h>
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#include <string.h>
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#include "../Utils/threadlib.h"
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#define NTHREADS 2
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volatile unsigned int unblockedUsr1Tid = 0;
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volatile unsigned int unblockedUsr2Tid = 0;
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volatile unsigned int unblockedALRMTid = 0;
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pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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pthread_mutex_t sigHandlerMutex = PTHREAD_MUTEX_INITIALIZER;
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unsigned long pinDetached = 0;
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extern "C" void TellPinToDetach(unsigned long *updateWhenReady)
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{
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// Tool does this
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//*updateWhenReady=1;
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return;
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}
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// True when the correct signal was handled by the correct thread
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static bool usr1Tested = false;
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static bool usr2Tested = false;
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static bool aLRMTested = false;
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void signal_handler(int signum, siginfo_t *siginfo, void *_uctxt)
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{
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pthread_mutex_lock(&sigHandlerMutex);
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// Verifying that the signal was received in the correct thread
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// (Signals are sent after detach)
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printf("Signal received: ");
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if (signum == SIGUSR1)
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{
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printf("SIGUSR1, in thread: %lu\n", GetTid());
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if (unblockedUsr1Tid == GetTid())
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{
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usr1Tested = true;
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}
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else
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{
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fprintf(stderr, "The signal mask is incorrect, SIGUSR1 is caught by %ld, expected %d\n",
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GetTid(), unblockedUsr1Tid);
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exit(-1);
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}
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}
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if (signum == SIGUSR2)
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{
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printf("SIGUSR2, in thread: %lu\n", GetTid());
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if (unblockedUsr2Tid == GetTid())
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{
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usr2Tested = true;
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}
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else
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{
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fprintf(stderr, "The signal mask is incorrect, SIGUSR2 is caught by %ld, expected %d\n",
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GetTid(), unblockedUsr2Tid);
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exit(-1);
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}
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}
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if (signum == SIGALRM)
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{
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printf("SIGALRM, in thread: %lu\n", GetTid());
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// We sent this signal before detach began, when it was blocked in all threads (pending)
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// We unblocked it after detach, therefore we expect to receive it after Pin detached.
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assert(pinDetached);
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if (unblockedALRMTid == GetTid())
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{
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aLRMTested = true;
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}
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else
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{
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fprintf(stderr, "The signal mask is incorrect, SIGALRM is caught by %ld, expected %d\n",
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GetTid(), unblockedALRMTid);
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exit(-1);
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}
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}
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if (usr1Tested && usr2Tested && aLRMTested)
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{
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printf("Signal handlers were changed to application ones after detach as expected\n");
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}
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pthread_mutex_unlock(&sigHandlerMutex);
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}
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/*
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*
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*/
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void * thread_func (void *arg)
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{
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unsigned long thread_no = (unsigned long)arg+1;
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sigset_t sigMask;
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sigset_t sigMaskAfterDeatch;
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bool *signalTested = NULL;
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int ret;
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// retrieve signal mask
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ret = pthread_sigmask(SIG_SETMASK, NULL, &sigMask);
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assert(0 == ret);
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// sanity check
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ret = sigismember(&sigMask, SIGUSR1);
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assert(1 == ret);
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ret = sigismember(&sigMask, SIGUSR2);
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assert(1 == ret);
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if (thread_no == 1)
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{
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unblockedUsr1Tid = GetTid();
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signalTested = &usr1Tested;
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// Unblocking SIGUSR1
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sigemptyset(&sigMask);
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sigaddset(&sigMask, SIGUSR1);
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int ret = pthread_sigmask(SIG_UNBLOCK, &sigMask, NULL);
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assert(0 == ret);
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// retrieve signal mask
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ret = pthread_sigmask(SIG_UNBLOCK, NULL, &sigMask);
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assert(0 == ret);
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// sanity check
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ret = sigismember(&sigMask, SIGUSR1);
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assert(0 == ret);
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ret = sigismember(&sigMask, SIGUSR2);
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assert(1 == ret);
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}
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if (thread_no == 2)
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{
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unblockedUsr2Tid = GetTid();
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signalTested = &usr2Tested;
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// Unblocking SIGUSR2
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sigemptyset(&sigMask);
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sigaddset(&sigMask, SIGUSR2);
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int ret = pthread_sigmask(SIG_UNBLOCK, &sigMask, NULL);
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assert(0 == ret);
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// retrieve signal mask
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ret = pthread_sigmask(SIG_UNBLOCK, NULL, &sigMask);
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assert(0 == ret);
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// sanity check
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ret = sigismember(&sigMask, SIGUSR2);
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assert(0 == ret);
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ret = sigismember(&sigMask, SIGUSR1);
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assert(1 == ret);
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}
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// Notify main thread it can continue
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pthread_mutex_unlock(&mutex);
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// Wait for detach to finish
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while (!pinDetached)
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{
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usleep(100000); //0.1 seconds
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}
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ret = pthread_sigmask(SIG_SETMASK, NULL, &sigMaskAfterDeatch);
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assert(0 == ret);
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if (sigMask != sigMaskAfterDeatch)
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{
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printf("ERROR: On Secondary thread, signal mask before detach: %x, Signal mask after detach: %x\n", sigMask, sigMaskAfterDeatch);
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exit(1);
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}
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// endless loop until signal will be received
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while(*signalTested == false)
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{
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sleep(1);
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}
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return 0;
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}
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int main()
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{
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struct sigaction act;
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sigset_t fullMask, sigMask, sigMaskOld;
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int ret;
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bzero(&act, sizeof(act));
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act.sa_flags = SA_SIGINFO;
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act.sa_sigaction = signal_handler;
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sigaction(SIGUSR1, &act, NULL);
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sigaction(SIGUSR2, &act, NULL);
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sigaction(SIGALRM, &act, NULL);
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// Block SIGUSR1 and SIGUSR2 on current thread
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sigemptyset(&sigMask);
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sigaddset(&sigMask, SIGUSR1);
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sigaddset(&sigMask, SIGUSR2);
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sigaddset(&sigMask, SIGALRM);
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ret = pthread_sigmask(SIG_BLOCK, &sigMask, NULL);
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assert(0 == ret);
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// retrieve signal mask
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ret = pthread_sigmask(SIG_SETMASK, NULL, &sigMaskOld);
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assert(0 == ret);
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// sanity check
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ret = sigismember(&sigMaskOld, SIGUSR1);
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assert(1 == ret);
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ret = sigismember(&sigMaskOld, SIGUSR2);
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assert(1 == ret);
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pthread_t h[NTHREADS];
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void* tlsBase = 0;
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for (unsigned long i = 0; i < NTHREADS; i++)
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{
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pthread_mutex_lock(&mutex);
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pthread_create (&h[i], 0, thread_func, (void *)i);
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}
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pthread_mutex_lock(&mutex);
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pthread_mutex_unlock(&mutex);
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// Sending SIGALRM (before detach), will be a pending since signal is blocked in all threads
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kill(getpid(), SIGALRM);
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printf("Request detach \n");
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TellPinToDetach(&pinDetached);
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// Wait for detach to finish
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while (!pinDetached)
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{
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usleep(100000); //0.1 seconds
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}
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printf("Detach completed\n");
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// retrieve signal mask
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ret = pthread_sigmask(SIG_SETMASK, NULL, &sigMask);
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assert(0 == ret);
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// Verify signal mask is the same after detach
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if (sigMask != sigMaskOld)
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{
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printf("ERROR: On main thread, signal mask before detach: %x, Signal mask after detach: %x\n", sigMaskOld, sigMask);
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exit(1);
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}
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unblockedALRMTid = GetTid();
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// Unblocking SIGALRM
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sigemptyset(&sigMask);
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sigaddset(&sigMask, SIGALRM);
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ret = pthread_sigmask(SIG_UNBLOCK, &sigMask, NULL);
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assert(0 == ret);
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// Sending these signals which will be handled on different threads
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kill(getpid(), SIGUSR1);
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kill(getpid(), SIGUSR2);
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// Wait for threads to exit
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// They will exit only when the above signals will handled,
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// this verifies that the signal handlers where changed to the ones of the application after the detach.
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void * result[NTHREADS];
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for (unsigned long i = 0; i < NTHREADS; i++)
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{
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pthread_join (h[i], &(result[i]));
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}
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for (unsigned long i = 0; i < NTHREADS; i++)
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{
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if (result[i] != 0)
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{
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fprintf(stderr, "TEST FAILED\n");
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return -1;
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}
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}
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assert(usr1Tested && usr2Tested && aLRMTested);
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printf("PASSED\n");
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return 0;
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}
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