131 lines
3.0 KiB
Bash
Executable File
131 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2014 EMC Corp.
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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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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# A regression test for a bug introduced in r269656.
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# Page fault in proc_realparent+0x70 seen.
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# Fixed in r270024.
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# Test scenario by Mark Johnston markj@
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > ptrace3.c
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mycc -o ptrace3 -Wall -Wextra -g ptrace3.c || exit 1
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rm -f ptrace3.c
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cd $here
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/tmp/ptrace3
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rm -f /tmp/ptrace3
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exit
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EOF
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <signal.h>
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#include <unistd.h>
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/*
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* A regression test for a bug introduced in r269656. The test process p creates
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* child processes c1 and c2 which do nothing but sleep; a third child process
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* (c3) uses ptrace(2) to reparent c1 and c2 from p to c3. Then c3 detaches from
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* c1 and c2, causing a crash when c1 and c2 are removed from p's now-corrupt
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* orphan list.
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*/
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pid_t
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sleeper()
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{
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pid_t p;
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p = fork();
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if (p == -1)
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err(1, "fork");
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else if (p == 0)
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while (1)
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sleep(1000000);
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return (p);
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}
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void
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attach(pid_t p)
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{
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int status;
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if (ptrace(PT_ATTACH, p, 0, 0) == -1)
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err(1, "ptrace");
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if (waitpid(p, &status, 0) == -1)
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err(1, "waitpid");
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else if (!WIFSTOPPED(status))
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errx(1, "failed to stop child");
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}
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void
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detach(pid_t p)
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{
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if (ptrace(PT_DETACH, p, 0, 0) == -1)
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err(1, "ptrace");
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}
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int
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main(void)
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{
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int status;
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pid_t c1, c2, p;
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c1 = sleeper();
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c2 = sleeper();
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p = fork();
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if (p == -1) {
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err(1, "fork");
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} else if (p == 0) {
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attach(c1);
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attach(c2);
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detach(c1);
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detach(c2);
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} else {
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if (waitpid(p, &status, 0) == -1)
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err(1, "waitpid");
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
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errx(1, "child exited abnormally");
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}
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/* Clean up. */
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(void)kill(c1, SIGKILL);
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(void)kill(c2, SIGKILL);
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return (0);
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}
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