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66 lines
1.4 KiB
66 lines
1.4 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 test verifies that the application can set up an alternate stack for
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* its signal handler.
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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char Stack[SIGSTKSZ];
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static void Handle(int);
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int main()
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{
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struct sigaction act;
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stack_t ss;
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ss.ss_sp = Stack;
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ss.ss_size = sizeof(Stack);
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ss.ss_flags = 0;
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if (sigaltstack(&ss, 0) != 0)
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{
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fprintf(stderr, "Unable to set alternate stack\n");
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return 1;
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}
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printf("Alternate stack is %p - %p\n", Stack, &Stack[SIGSTKSZ]);
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act.sa_handler = Handle;
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act.sa_flags = SA_ONSTACK;
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sigemptyset(&act.sa_mask);
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if (sigaction(SIGUSR1, &act, 0) != 0)
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{
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fprintf(stderr, "Unable to set up USR1 handler\n");
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return 1;
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}
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raise(SIGUSR1);
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return 0;
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}
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static void Handle(int sig)
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{
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char *sp = (char *)&sig;
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printf("Got signal %d with SP=%p\n", sig, sp);
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if (sp < Stack || sp > &Stack[SIGSTKSZ])
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{
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fprintf(stderr, "Handler not running on alternate stack\n");
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exit(1);
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}
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}
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