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59 lines
1.3 KiB
59 lines
1.3 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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/*
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* This is a test case sent by a pinhead. It used to demonstrate a problem on newer linux
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* kernels (e.g. 2.6.25) when a signal interrupts a futex system call.
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*/
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#include <stdio.h>
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#include <pthread.h>
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#include <signal.h>
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#include <unistd.h>
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volatile int flag = 0;
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static void Handler(int);
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static void *Start(void *);
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int main()
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{
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pthread_t thrd1;
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pthread_t thrd2;
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pthread_create(&thrd1, 0, Start, 0);
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pthread_create(&thrd2, 0, Start, (void *)1);
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pthread_join(thrd1, 0);
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pthread_join(thrd2, 0);
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return 0;
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}
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static void Handler(int sig)
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{
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flag = 1;
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printf("received signal\n");
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}
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static void *Start(void *v)
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{
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if (v != 0)
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{
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printf("setting alarm\n");
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signal(SIGALRM, &Handler);
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alarm(2);
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}
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printf("waiting for signal at %p\n", &flag);
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while (!flag);
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return 0;
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}
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