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      1 /*	$NetBSD: t_ptrace_kill_wait.h,v 1.1 2020/05/04 21:55:12 kamil Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016, 2017, 2018, 2019, 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 static void
     30 ptrace_kill(const char *type)
     31 {
     32 	const int sigval = SIGSTOP;
     33 	pid_t child, wpid;
     34 #if defined(TWAIT_HAVE_STATUS)
     35 	int status;
     36 #endif
     37 
     38 	DPRINTF("Before forking process PID=%d\n", getpid());
     39 	SYSCALL_REQUIRE((child = fork()) != -1);
     40 	if (child == 0) {
     41 		DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
     42 		FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
     43 
     44 		DPRINTF("Before raising %s from child\n", strsignal(sigval));
     45 		FORKEE_ASSERT(raise(sigval) == 0);
     46 
     47 		/* NOTREACHED */
     48 		FORKEE_ASSERTX(0 &&
     49 		    "Child should be terminated by a signal from its parent");
     50 	}
     51 	DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
     52 
     53 	DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
     54 	TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
     55 
     56 	validate_status_stopped(status, sigval);
     57 
     58 	DPRINTF("Before killing the child process with %s\n", type);
     59 	if (strcmp(type, "ptrace(PT_KILL)") == 0) {
     60 		SYSCALL_REQUIRE(ptrace(PT_KILL, child, (void*)1, 0) != -1);
     61 	} else if (strcmp(type, "kill(SIGKILL)") == 0) {
     62 		kill(child, SIGKILL);
     63 	} else if (strcmp(type, "killpg(SIGKILL)") == 0) {
     64 		setpgid(child, 0);
     65 		killpg(getpgid(child), SIGKILL);
     66 	}
     67 
     68 	DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
     69 	TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
     70 
     71 	validate_status_signaled(status, SIGKILL, 0);
     72 
     73 	DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
     74 	TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
     75 }
     76 
     77 #define PTRACE_KILL(test, type)						\
     78 ATF_TC(test);								\
     79 ATF_TC_HEAD(test, tc)							\
     80 {									\
     81         atf_tc_set_md_var(tc, "descr",					\
     82             "Verify killing the child with " type);			\
     83 }									\
     84 									\
     85 ATF_TC_BODY(test, tc)							\
     86 {									\
     87 									\
     88         ptrace_kill(type);						\
     89 }
     90 
     91 // PT_CONTINUE with SIGKILL is covered by traceme_sendsignal_simple1
     92 PTRACE_KILL(kill1, "ptrace(PT_KILL)")
     93 PTRACE_KILL(kill2, "kill(SIGKILL)")
     94 PTRACE_KILL(kill3, "killpg(SIGKILL)")
     95 
     96 #define ATF_TP_ADD_TCS_PTRACE_WAIT_KILL() \
     97 	ATF_TP_ADD_TC(tp, kill1); \
     98 	ATF_TP_ADD_TC(tp, kill2); \
     99 	ATF_TP_ADD_TC(tp, kill3);
    100