Differential D9260 Diff 25153 tests/sys/kern/ptrace_test.c

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tests/sys/kern/ptrace_test.c

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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.		* SUCH DAMAGE.
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

#include <sys/types.h>		#include <sys/types.h>
		#include <sys/cpuset.h>
		#include <sys/event.h>
		#include <sys/time.h>
#include <sys/ptrace.h>		#include <sys/ptrace.h>
#include <sys/syscall.h>		#include <sys/syscall.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>
#include <sys/user.h>		#include <sys/user.h>
#include <sys/wait.h>		#include <sys/wait.h>
#include <errno.h>		#include <errno.h>
#include <pthread.h>		#include <pthread.h>
		#include <semaphore.h>
#include <signal.h>		#include <signal.h>
#include <stdio.h>		#include <stdio.h>
#include <stdlib.h>		#include <stdlib.h>
#include <unistd.h>		#include <unistd.h>
#include <atf-c.h>		#include <atf-c.h>

/*		/*
* A variant of ATF_REQUIRE that is suitable for use in child		* A variant of ATF_REQUIRE that is suitable for use in child
▲ Show 20 Lines • Show All 1,622 Lines • ▼ Show 20 Lines	ATF_TC_BODY(ptrace__ptrace_vfork_follow, tc)
ATF_REQUIRE(WIFEXITED(status));		ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 1);		ATF_REQUIRE(WEXITSTATUS(status) == 1);

wpid = wait(&status);		wpid = wait(&status);
ATF_REQUIRE(wpid == -1);		ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);		ATF_REQUIRE(errno == ECHILD);
}		}

		/*
		* Verify that no more events are reported after PT_KILL except for the
		* process exit when stopped due to a breakpoint trap.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_KILL_breakpoint);
		ATF_TC_BODY(ptrace__PT_KILL_breakpoint, tc)
		{
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		__builtin_debugtrap();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		/* The second wait() should report hitting the breakpoint. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		/* Kill the child process. */
		ATF_REQUIRE(ptrace(PT_KILL, fpid, 0, 0) == 0);

		/* The last wait() should report the SIGKILL. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGKILL);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		/*
		* Verify that no more events are reported after PT_KILL except for the
		* process exit when stopped inside of a system call.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_KILL_system_call);
		ATF_TC_BODY(ptrace__PT_KILL_system_call, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		getpid();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP and tracing system calls. */
		ATF_REQUIRE(ptrace(PT_SYSCALL, fpid, (caddr_t)1, 0) == 0);

		/* The second wait() should report a system call entry for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);

		/* Kill the child process. */
		ATF_REQUIRE(ptrace(PT_KILL, fpid, 0, 0) == 0);

		/* The last wait() should report the SIGKILL. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGKILL);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		/*
		* Verify that no more events are reported after PT_KILL except for the
		* process exit when killing a multithreaded process.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_KILL_threads);
		ATF_TC_BODY(ptrace__PT_KILL_threads, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		lwpid_t main_lwp;
		int status;

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		simple_thread_main();
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl,
		sizeof(pl)) != -1);
		main_lwp = pl.pl_lwpid;

		ATF_REQUIRE(ptrace(PT_LWP_EVENTS, wpid, NULL, 1) == 0);

		/* Continue the child ignoring the SIGSTOP. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		/* The first event should be for the child thread's birth. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE((pl.pl_flags & (PL_FLAG_BORN \| PL_FLAG_SCX)) ==
		(PL_FLAG_BORN \| PL_FLAG_SCX));
		ATF_REQUIRE(pl.pl_lwpid != main_lwp);

		/* Kill the child process. */
		ATF_REQUIRE(ptrace(PT_KILL, fpid, 0, 0) == 0);

		/* The last wait() should report the SIGKILL. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGKILL);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		static void *
		mask_usr1_thread(void *arg)
		{
		pthread_barrier_t *pbarrier;
		sigset_t sigmask;

		pbarrier = (pthread_barrier_t*)arg;

		sigemptyset(&sigmask);
		sigaddset(&sigmask, SIGUSR1);
		CHILD_REQUIRE(pthread_sigmask(SIG_BLOCK, &sigmask, NULL) == 0);

		/* Sync up with other thread after sigmask updated. */
		pthread_barrier_wait(pbarrier);

		for(;;)
		sleep(60);

		return NULL;
		}

		/*
		* Verify that the SIGKILL from PT_KILL takes priority over other signals
		* and prevents spurious stops due to those other signals.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_KILL_competing_signal);
		ATF_TC_BODY(ptrace__PT_KILL_competing_signal, tc)
		{
		pid_t fpid, wpid;
		int status;
		cpuset_t setmask;
		pthread_t t;
		pthread_barrier_t barrier;

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		/*
		* Bind to one CPU so only one thread at a time will run. This
		* test expects that the first thread created (the main thread)
		* will be unsuspended first and will block the second thread
		* from running.
		*/
		CPU_ZERO(&setmask);
		CPU_SET(0, &setmask);
		cpusetid_t setid;
		CHILD_REQUIRE(cpuset(&setid) == 0);
		CHILD_REQUIRE(cpuset_setaffinity(CPU_LEVEL_CPUSET,
		CPU_WHICH_CPUSET, setid, sizeof(setmask), &setmask) == 0);

		CHILD_REQUIRE(pthread_barrier_init(&barrier, NULL, 2) == 0);

		CHILD_REQUIRE(pthread_create(&t, NULL, mask_usr1_thread,
		(void*)&barrier) == 0);

		sigset_t sigmask;
		sigemptyset(&sigmask);
		sigaddset(&sigmask, SIGUSR2);
		CHILD_REQUIRE(pthread_sigmask(SIG_BLOCK, &sigmask, NULL) == 0);

		/* Sync up with other thread after sigmask updated. */
		pthread_barrier_wait(&barrier);

		trace_me();

		for (;;)
		sleep(60);

		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		/* Send a signal that only the second thread can handle. */
		ATF_REQUIRE(kill(fpid, SIGUSR2) == 0);

		/* The second wait() should report the SIGUSR2. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGUSR2);

		/* Send a signal that only the first thread can handle. */
		ATF_REQUIRE(kill(fpid, SIGUSR1) == 0);

		/* Replace the SIGUSR2 with a kill. */
		ATF_REQUIRE(ptrace(PT_KILL, fpid, 0, 0) == 0);

		/* The last wait() should report the SIGKILL (not the SIGUSR signal). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGKILL);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		static void
		sigusr1_handler(int sig)
		{

		CHILD_REQUIRE(sig == SIGUSR1);
		_exit(2);
		}

		/*
		* Verify that when stopped at a system call entry, a signal can be
		* requested with PT_CONTINUE which will be delivered once the system
		* call is complete.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_system_call_entry);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_signal_system_call_entry, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE(signal(SIGUSR1, sigusr1_handler) != SIG_ERR);

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		getpid();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP and tracing system calls. */
		ATF_REQUIRE(ptrace(PT_SYSCALL, fpid, (caddr_t)1, 0) == 0);

		/* The second wait() should report a system call entry for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);

		/* Continue the child process with a signal. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		for (;;) {
		/*
		* The last wait() should report exit 2, i.e., a normal _exit
		* from the signal handler. In the meantime, catch and proceed
		* past any syscall stops.
		*/
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & (PL_FLAG_SCE \| PL_FLAG_SCX));
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
		} else {
		ATF_REQUIRE(WIFEXITED(status));
		ATF_REQUIRE(WEXITSTATUS(status) == 2);
		break;
		}
		}

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		static void
		sigusr1_counting_handler(int sig)
		{
		static int counter = 0;

		CHILD_REQUIRE(sig == SIGUSR1);
		counter++;
		if (counter == 2)
		_exit(2);
		}

		/*
		* Verify that, when continuing from a stop at system call entry and exit,
		* a signal can be requested from both stops, and both will be delivered when
		* the system call is complete.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_system_call_entry_and_exit);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_signal_system_call_entry_and_exit, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE(signal(SIGUSR1, sigusr1_counting_handler) != SIG_ERR);

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		getpid();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP and tracing system calls. */
		ATF_REQUIRE(ptrace(PT_SYSCALL, fpid, (caddr_t)1, 0) == 0);

		/* The second wait() should report a system call entry for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);

		/* Continue the child process with a signal. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		/* The third wait() should report a system call exit for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCX);

		/* Continue the child process with a signal. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		for (;;) {
		/*
		* The last wait() should report exit 2, i.e., a normal _exit
		* from the signal handler. In the meantime, catch and proceed
		* past any syscall stops.
		*/
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & (PL_FLAG_SCE \| PL_FLAG_SCX));
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
		} else {
		ATF_REQUIRE(WIFEXITED(status));
		ATF_REQUIRE(WEXITSTATUS(status) == 2);
		break;
		}
		}

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		/*
		* Verify that even if the signal queue is full for a child process,
		* a PT_KILL will kill the process.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_full_sigqueue);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_signal_full_sigqueue, tc)
		{
		pid_t fpid, wpid;
		int status;
		int max_pending_per_proc;
		size_t len;
		int i;

		ATF_REQUIRE(signal(SIGUSR1, sigusr1_handler) != SIG_ERR);

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		len = sizeof(max_pending_per_proc);
		ATF_REQUIRE(sysctlbyname("kern.sigqueue.max_pending_per_proc",
		&max_pending_per_proc, &len, NULL, 0) == 0);

		/* Fill the signal queue. */
		for (i = 0; i < max_pending_per_proc; ++i)
		ATF_REQUIRE(kill(fpid, SIGUSR1) == 0);

		/* Kill the child process. */
		ATF_REQUIRE(ptrace(PT_KILL, fpid, 0, 0) == 0);

		/* The last wait() should report the SIGKILL. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGKILL);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		/*
		* Verify that, after stopping due to a signal, that signal can be
		* replaced with another signal.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_change_sig);
		ATF_TC_BODY(ptrace__PT_CONTINUE_change_sig, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		sleep(20);
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		/* Send a signal without ptrace. */
		ATF_REQUIRE(kill(fpid, SIGINT) == 0);

		/* The second wait() should report a SIGINT was received. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGINT);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SI);
		ATF_REQUIRE(pl.pl_siginfo.si_signo == SIGINT);

		/* Continue the child process with a different signal. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGTERM) == 0);

		/*
		* The last wait() should report having died due to the new
		* signal, SIGTERM.
		*/
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGTERM);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		/*
		* Verify that a signal can be passed through to the child even when there
		* was no true signal originally. Such cases arise when a SIGTRAP is
		* invented for e.g, system call stops.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_sigtrap_system_call_entry);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_sigtrap_system_call_entry, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		getpid();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP and tracing system calls. */
		ATF_REQUIRE(ptrace(PT_SYSCALL, fpid, (caddr_t)1, 0) == 0);

		/* The second wait() should report a system call entry for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);

		/* Continue the child process with a SIGTRAP. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGTRAP) == 0);

		for (;;) {
		/*
		* The last wait() should report exit due to SIGTRAP. In the
		* meantime, catch and proceed past any syscall stops.
		*/
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & (PL_FLAG_SCE \| PL_FLAG_SCX));
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
		} else {
		ATF_REQUIRE(WIFSIGNALED(status));
		ATF_REQUIRE(WTERMSIG(status) == SIGTRAP);
		break;
		}
		}

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);

		}

		/*
		* A mixed bag PT_CONTINUE with signal test.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_mix);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_signal_mix, tc)
		{
		struct ptrace_lwpinfo pl;
		pid_t fpid, wpid;
		int status;

		ATF_REQUIRE(signal(SIGUSR1, sigusr1_counting_handler) != SIG_ERR);

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		trace_me();
		getpid();
		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP and tracing system calls. */
		ATF_REQUIRE(ptrace(PT_SYSCALL, fpid, (caddr_t)1, 0) == 0);

		/* The second wait() should report a system call entry for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);

		/* Continue with the first SIGUSR1. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		/* The next wait() should report a system call exit for getpid(). */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCX);

		/* Send an ABRT without ptrace. */
		ATF_REQUIRE(kill(fpid, SIGABRT) == 0);

		/* Continue normally. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		/* The next wait() should report the SIGABRT. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGABRT);

		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & PL_FLAG_SI);
		ATF_REQUIRE(pl.pl_siginfo.si_signo == SIGABRT);

		/* Continue, replacing the SIGABRT with another SIGUSR1. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		for (;;) {
		/*
		* The last wait() should report exit 2, i.e., a normal _exit
		* from the signal handler. In the meantime, catch and proceed
		* past any syscall stops.
		*/
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
		ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
		ATF_REQUIRE(pl.pl_flags & (PL_FLAG_SCE \| PL_FLAG_SCX));
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
		} else {
		ATF_REQUIRE(WIFEXITED(status));
		ATF_REQUIRE(WEXITSTATUS(status) == 2);
		break;
		}
		}

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);

		}

		/*
		* Verify a signal delivered by ptrace is noticed by kevent(2).
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_kqueue);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_signal_kqueue, tc)
		{
		pid_t fpid, wpid;
		int status, kq, nevents;
		struct kevent kev;

		ATF_REQUIRE(signal(SIGUSR1, SIG_IGN) != SIG_ERR);

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		CHILD_REQUIRE((kq = kqueue()) > 0);
		EV_SET(&kev, SIGUSR1, EVFILT_SIGNAL, EV_ADD, 0, 0, 0);
		CHILD_REQUIRE(kevent(kq, &kev, 1, NULL, 0, NULL) == 0);

		trace_me();

		for (;;) {
		nevents = kevent(kq, NULL, 0, &kev, 1, NULL);
		if (nevents == -1 && errno == EINTR)
		continue;
		CHILD_REQUIRE(nevents > 0);
		CHILD_REQUIRE(kev.filter == EVFILT_SIGNAL);
		CHILD_REQUIRE(kev.ident == SIGUSR1);
		break;
		}

		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue with the SIGUSR1. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		/*
		* The last wait() should report normal exit with code 1.
		*/
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFEXITED(status));
		ATF_REQUIRE(WEXITSTATUS(status) == 1);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

		static sem_t sigusr1_sem;

		jhbUnsubmitted Done Inline Actions Perhaps a blank line here before the function definition? jhb: Perhaps a blank line here before the function definition?
		static void
		sigusr1_sempost_handler(int sig __unused)
		{

		CHILD_REQUIRE(sem_post(&sigusr1_sem) == 0);
		}

		static void *
		signal_thread(void *arg)
		{
		int err;
		sigset_t sigmask;

		pthread_barrier_t pbarrier = (pthread_barrier_t)arg;

		/* Wait for this thread to receive a SIGUSR1. */
		do {
		err = sem_wait(&sigusr1_sem);
		CHILD_REQUIRE(err == 0 \|\| errno == EINTR);
		} while (err != 0 && errno == EINTR);

		/* Free our companion thread from the barrier. */
		pthread_barrier_wait(pbarrier);

		/*
		* Swap ignore duties; the next SIGUSR1 should go to the
		* other thread.
		*/
		CHILD_REQUIRE(sigemptyset(&sigmask) == 0);
		CHILD_REQUIRE(sigaddset(&sigmask, SIGUSR1) == 0);
		CHILD_REQUIRE(pthread_sigmask(SIG_BLOCK, &sigmask, NULL) == 0);

		/* Sync up threads after swapping signal masks. */
		pthread_barrier_wait(pbarrier);

		/* Wait until our companion has received its SIGUSR1. */
		pthread_barrier_wait(pbarrier);

		return NULL;
		}

		/*
		* Verify that if ptrace stops due to a signal but continues with
		* a different signal that the new signal is routed to a thread
		* that can accept it, and that that thread is awakened by the signal
		* in a timely manner.
		*/
		ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_thread_sigmask);
		ATF_TC_BODY(ptrace__PT_CONTINUE_with_signal_thread_sigmask, tc)
		{
		pid_t fpid, wpid;
		int status, err;
		pthread_t t;
		sigset_t sigmask;
		pthread_barrier_t barrier;

		ATF_REQUIRE(pthread_barrier_init(&barrier, NULL, 2) == 0);
		ATF_REQUIRE(sem_init(&sigusr1_sem, 0, 0) == 0);
		ATF_REQUIRE(signal(SIGUSR1, sigusr1_sempost_handler) != SIG_ERR);

		ATF_REQUIRE((fpid = fork()) != -1);
		if (fpid == 0) {
		CHILD_REQUIRE(pthread_create(&t, NULL, signal_thread, (void*)&barrier) == 0);

		/* The other thread should receive the first SIGUSR1. */
		CHILD_REQUIRE(sigemptyset(&sigmask) == 0);
		CHILD_REQUIRE(sigaddset(&sigmask, SIGUSR1) == 0);
		CHILD_REQUIRE(pthread_sigmask(SIG_BLOCK, &sigmask, NULL) == 0);

		trace_me();

		/* Wait until other thread has received its SIGUSR1. */
		pthread_barrier_wait(&barrier);

		/*
		* Swap ignore duties; the next SIGUSR1 should go to this
		* thread.
		*/
		CHILD_REQUIRE(pthread_sigmask(SIG_UNBLOCK, &sigmask, NULL) == 0);

		/* Sync up threads after swapping signal masks. */
		pthread_barrier_wait(&barrier);

		/*
		* Sync up with test code; we're ready for the next SIGUSR1
		* now.
		*/
		raise(SIGSTOP);

		/* Wait for this thread to receive a SIGUSR1. */
		do {
		err = sem_wait(&sigusr1_sem);
		CHILD_REQUIRE(err == 0 \|\| errno == EINTR);
		} while (err != 0 && errno == EINTR);

		/* Free the other thread from the barrier. */
		pthread_barrier_wait(&barrier);

		CHILD_REQUIRE(pthread_join(t, NULL) == 0);

		exit(1);
		}

		/* The first wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		/*
		* Send a signal without ptrace that either thread will accept (USR2,
		* in this case).
		*/
		ATF_REQUIRE(kill(fpid, SIGUSR2) == 0);

		/* The second wait() should report a SIGUSR2 was received. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGUSR2);

		/* Continue the child, changing the signal to USR1. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		/* The next wait() should report the stop from SIGSTOP. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);

		/* Continue the child ignoring the SIGSTOP. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);

		ATF_REQUIRE(kill(fpid, SIGUSR2) == 0);

		/* The next wait() should report a SIGUSR2 was received. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFSTOPPED(status));
		ATF_REQUIRE(WSTOPSIG(status) == SIGUSR2);

		/* Continue the child, changing the signal to USR1. */
		ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, SIGUSR1) == 0);

		/* The last wait() should report normal exit with code 1. */
		wpid = waitpid(fpid, &status, 0);
		ATF_REQUIRE(wpid == fpid);
		ATF_REQUIRE(WIFEXITED(status));
		ATF_REQUIRE(WEXITSTATUS(status) == 1);

		wpid = wait(&status);
		ATF_REQUIRE(wpid == -1);
		ATF_REQUIRE(errno == ECHILD);
		}

ATF_TP_ADD_TCS(tp)		ATF_TP_ADD_TCS(tp)
{		{

ATF_TP_ADD_TC(tp, ptrace__parent_wait_after_trace_me);		ATF_TP_ADD_TC(tp, ptrace__parent_wait_after_trace_me);
ATF_TP_ADD_TC(tp, ptrace__parent_wait_after_attach);		ATF_TP_ADD_TC(tp, ptrace__parent_wait_after_attach);
ATF_TP_ADD_TC(tp, ptrace__parent_sees_exit_after_child_debugger);		ATF_TP_ADD_TC(tp, ptrace__parent_sees_exit_after_child_debugger);
ATF_TP_ADD_TC(tp, ptrace__parent_sees_exit_after_unrelated_debugger);		ATF_TP_ADD_TC(tp, ptrace__parent_sees_exit_after_unrelated_debugger);
ATF_TP_ADD_TC(tp, ptrace__follow_fork_both_attached);		ATF_TP_ADD_TC(tp, ptrace__follow_fork_both_attached);
Show All 11 Lines	ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, ptrace__lwp_events);		ATF_TP_ADD_TC(tp, ptrace__lwp_events);
ATF_TP_ADD_TC(tp, ptrace__lwp_events_exec);		ATF_TP_ADD_TC(tp, ptrace__lwp_events_exec);
ATF_TP_ADD_TC(tp, ptrace__siginfo);		ATF_TP_ADD_TC(tp, ptrace__siginfo);
ATF_TP_ADD_TC(tp, ptrace__ptrace_exec_disable);		ATF_TP_ADD_TC(tp, ptrace__ptrace_exec_disable);
ATF_TP_ADD_TC(tp, ptrace__ptrace_exec_enable);		ATF_TP_ADD_TC(tp, ptrace__ptrace_exec_enable);
ATF_TP_ADD_TC(tp, ptrace__event_mask);		ATF_TP_ADD_TC(tp, ptrace__event_mask);
ATF_TP_ADD_TC(tp, ptrace__ptrace_vfork);		ATF_TP_ADD_TC(tp, ptrace__ptrace_vfork);
ATF_TP_ADD_TC(tp, ptrace__ptrace_vfork_follow);		ATF_TP_ADD_TC(tp, ptrace__ptrace_vfork_follow);
		ATF_TP_ADD_TC(tp, ptrace__PT_KILL_breakpoint);
		ATF_TP_ADD_TC(tp, ptrace__PT_KILL_system_call);
		ATF_TP_ADD_TC(tp, ptrace__PT_KILL_threads);
		ATF_TP_ADD_TC(tp, ptrace__PT_KILL_competing_signal);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_with_signal_system_call_entry);
		ATF_TP_ADD_TC(tp,
		ptrace__PT_CONTINUE_with_signal_system_call_entry_and_exit);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_with_signal_full_sigqueue);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_change_sig);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_with_sigtrap_system_call_entry);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_with_signal_mix);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_with_signal_kqueue);
		ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_with_signal_thread_sigmask);

return (atf_no_error());		return (atf_no_error());
}		}