Add new test traceme3 in t_ptrace
This test is modeled after traceme1 and traceme2 with the goal to test if the child was terminated with a received signal passed with PT_CONTINUE. Currently the three traceme tests verifies three possible status values from waitpid(2) called by the parent: - WIFEXITED(status), - WIFSIGNALED(status), - WIFSTOPPED(status) with associated macros: - WEXITSTATUS(status), - WTERMSIG(status), - WCOREDUMP(status), - WSTOPSIG(status). In traceme3 has been assumed that Ctrl-C (SIGINT) does not emit core(5). Sponsored by <The NetBSD Foundation>.
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kamil
parent
2cc02dd108
commit
0c55761e36
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@ -1,4 +1,4 @@
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/* $NetBSD: t_ptrace.c,v 1.2 2016/11/02 22:18:04 kamil Exp $ */
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/* $NetBSD: t_ptrace.c,v 1.3 2016/11/03 08:48:53 kamil Exp $ */
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/*-
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* Copyright (c) 2016 The NetBSD Foundation, Inc.
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@ -27,7 +27,7 @@
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_ptrace.c,v 1.2 2016/11/02 22:18:04 kamil Exp $");
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__RCSID("$NetBSD: t_ptrace.c,v 1.3 2016/11/03 08:48:53 kamil Exp $");
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#include <sys/param.h>
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#include <sys/types.h>
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@ -141,7 +141,6 @@ ATF_TC_BODY(traceme1, tc)
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sys_errlist[ECHILD], sys_errlist[errno]);
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ATF_REQUIRE(errno == ECHILD);
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}
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}
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ATF_TC(traceme2);
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@ -271,13 +270,121 @@ ATF_TC_BODY(traceme2, tc)
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sys_errlist[ECHILD], sys_errlist[errno]);
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ATF_REQUIRE(errno == ECHILD);
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}
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}
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ATF_TC(traceme3);
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ATF_TC_HEAD(traceme3, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Verify SIGSTOP followed by termination by a signal in a child");
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}
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ATF_TC_BODY(traceme3, tc)
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{
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int status;
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const int sigval = SIGSTOP, sigsent = SIGINT /* Without core-dump */;
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pid_t child, wpid;
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printf("1: Before forking process PID=%d\n", getpid());
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ATF_REQUIRE((child = fork()) != -1);
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if (child == 0) {
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/* printf(3) messages from a child aren't intercepted by ATF */
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/* "2: Child process PID=%d\n", getpid() */
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/* "2: Before calling ptrace(PT_TRACE_ME, ...)\n" */
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if (ptrace(PT_TRACE_ME, 0, NULL, 0) == -1) {
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/* XXX: Is it safe to use ATF functions in a child? */
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err(EXIT_FAILURE, "2: ptrace(2) call failed with "
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"status %s", sys_errlist[errno]);
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}
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/* "2: Before raising SIGSTOP\n" */
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raise(sigval);
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/* NOTREACHED */
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errx(EXIT_FAILURE, "2: Child should be terminated here by a "
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"signal from parent");
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} else {
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printf("1: Parent process PID=%d, child's PID=%d\n", getpid(),
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child);
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printf("1: Before calling waitpid() for the child\n");
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wpid = waitpid(child, &status, 0);
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printf("1: Validating child's PID (expected %d, got %d)\n",
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child, wpid);
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ATF_REQUIRE(child == wpid);
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printf("1: Ensuring that the child has not been exited\n");
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ATF_REQUIRE(!WIFEXITED(status));
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printf("1: Ensuring that the child has not been continued\n");
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ATF_REQUIRE(!WIFCONTINUED(status));
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printf("1: Ensuring that the child has not been terminated "
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"with a signal\n");
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ATF_REQUIRE(!WIFSIGNALED(status));
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printf("1: Ensuring that the child has been stopped\n");
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ATF_REQUIRE(WIFSTOPPED(status));
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printf("1: Verifying that he child has been stopped with the"
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" %s signal (received %s)\n", sys_signame[sigval],
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sys_signame[WSTOPSIG(status)]);
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ATF_REQUIRE(WSTOPSIG(status) == sigval);
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printf("1: Before resuming the child process where it left "
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"off and with signal %s to be sent\n",
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sys_signame[sigsent]);
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, sigsent)
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!= -1);
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printf("1: Before calling waitpid() for the child\n");
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wpid = waitpid(child, &status, 0);
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printf("1: Validating that child's PID is still there\n");
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ATF_REQUIRE(wpid == child);
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printf("1: Ensuring that the child has not been exited\n");
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ATF_REQUIRE(!WIFEXITED(status));
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printf("1: Ensuring that the child has not been continued\n");
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ATF_REQUIRE(!WIFCONTINUED(status));
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printf("1: Ensuring that the child hast been terminated with "
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"a signal\n");
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ATF_REQUIRE(WIFSIGNALED(status));
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printf("1: Ensuring that the child has not been stopped\n");
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ATF_REQUIRE(!WIFSTOPPED(status));
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printf("1: Verifying that he child has not core dumped "
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"for the %s signal (it is the default behavior)\n",
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sys_signame[sigsent]);
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ATF_REQUIRE(!WCOREDUMP(status));
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printf("1: Verifying that he child has been stopped with the"
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" %s signal (received %s)\n", sys_signame[sigsent],
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sys_signame[WTERMSIG(status)]);
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ATF_REQUIRE(WTERMSIG(status) == sigsent);
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printf("1: Before calling waitpid() for the exited child\n");
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wpid = waitpid(child, &status, 0);
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printf("1: Validating that child's PID no longer exists\n");
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ATF_REQUIRE(wpid == -1);
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printf("1: Validating that errno is set to %s (got %s)\n",
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sys_errlist[ECHILD], sys_errlist[errno]);
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ATF_REQUIRE(errno == ECHILD);
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}
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, traceme1);
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ATF_TP_ADD_TC(tp, traceme2);
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ATF_TP_ADD_TC(tp, traceme3);
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return atf_no_error();
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}
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