111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*
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* Check handling of CLONE_PTRACE'ed processes.
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*
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* Copyright (c) 2015-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <errno.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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static siginfo_t sinfo;
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static void
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handler(const int no, siginfo_t *const si, void *const uc)
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{
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memcpy(&sinfo, si, sizeof(sinfo));
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}
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static int
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child(void *const arg)
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{
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for(;;)
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pause();
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return 0;
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}
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#define child_stack_size (get_page_size() / 2)
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#ifdef IA64
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extern int __clone2(int (*)(void *), void *, size_t, int, void *, ...);
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# define clone(fn, child_stack, flags, arg) \
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__clone2(fn, child_stack, child_stack_size, flags, arg)
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#endif
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int
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main(void)
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{
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const int sig = SIGUSR1;
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, sig);
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if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
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perror_msg_and_fail("sigprocmask");
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const pid_t pid = clone(child, tail_alloc(child_stack_size),
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CLONE_PTRACE | SIGCHLD, 0);
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if (pid < 0)
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perror_msg_and_fail("clone");
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static const struct sigaction sa = {
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.sa_sigaction = handler,
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.sa_flags = SA_SIGINFO
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};
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if (sigaction(SIGCHLD, &sa, NULL))
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perror_msg_and_fail("sigaction");
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kill(pid, sig);
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FILE *const fp = fdopen(3, "a");
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if (!fp)
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perror_msg_and_fail("fdopen");
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if (fprintf(fp, "%s: Detached unknown pid %d\n",
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getenv("STRACE_EXE") ?: "strace", pid) < 0)
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perror_msg_and_fail("fprintf");
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int status;
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while (wait(&status) != pid) {
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if (errno != EINTR)
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perror_msg_and_fail("wait");
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}
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if (!WIFSIGNALED(status) || WTERMSIG(status) != sig)
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error_msg_and_fail("unexpected child exit status %d", status);
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printf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=%d"
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", si_uid=%u, si_status=%s, si_utime=%u, si_stime=%u} ---\n"
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"+++ exited with 0 +++\n", pid, geteuid(), "SIGUSR1",
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(unsigned int) sinfo.si_utime, (unsigned int) sinfo.si_stime);
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return 0;
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}
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