diff options
| author | kamil <kamil@NetBSD.org> | 2016-11-02 12:51:22 +0000 |
|---|---|---|
| committer | kamil <kamil@NetBSD.org> | 2016-11-02 12:51:22 +0000 |
| commit | 123762a5da7fdf703c4d81dff59ce8ca0e238e44 (patch) | |
| tree | 26ee406857d88d5e5219448d93bdf89cdf2096bb /tests/kernel | |
| parent | 08e1b1d73b59a8bab0a37dde5e00e3ad3605e827 (diff) | |
Add new test t_ptrace with traceme1
This test is a placeholder for further checks of the native ptrace(2)
function calls.
XXX: Is it safe to call ATF functions from a child? FreeBSD seems to
construct dedicated asserts for them.
XXX: printf(3) calls from a child are not intercepted by atf-run(1)
Sponsored by <The NetBSD Foundation>.
Diffstat (limited to 'tests/kernel')
| -rw-r--r-- | tests/kernel/Makefile | 3 | ||||
| -rw-r--r-- | tests/kernel/t_ptrace.c | 152 |
2 files changed, 154 insertions, 1 deletions
diff --git a/tests/kernel/Makefile b/tests/kernel/Makefile index 5df392d9e49..9e37c402c35 100644 --- a/tests/kernel/Makefile +++ b/tests/kernel/Makefile @@ -1,4 +1,4 @@ -# $NetBSD: Makefile,v 1.39 2016/02/15 14:59:38 christos Exp $ +# $NetBSD: Makefile,v 1.40 2016/11/02 12:51:22 kamil Exp $ NOMAN= # defined @@ -9,6 +9,7 @@ TESTSDIR= ${TESTSBASE}/kernel TESTS_SUBDIRS= kqueue TESTS_C= t_lock TESTS_C+= t_lockf +TESTS_C+= t_ptrace TESTS_C+= t_pty TESTS_C+= t_mqueue TESTS_C+= t_sysv diff --git a/tests/kernel/t_ptrace.c b/tests/kernel/t_ptrace.c new file mode 100644 index 00000000000..8602e994e63 --- /dev/null +++ b/tests/kernel/t_ptrace.c @@ -0,0 +1,152 @@ +/* $NetBSD: t_ptrace.c,v 1.1 2016/11/02 12:51:22 kamil Exp $ */ + +/*- + * Copyright (c) 2016 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__RCSID("$NetBSD: t_ptrace.c,v 1.1 2016/11/02 12:51:22 kamil Exp $"); + +#include <sys/param.h> +#include <sys/types.h> +#include <sys/ptrace.h> +#include <sys/wait.h> +#include <err.h> +#include <errno.h> +#include <signal.h> +#include <stdio.h> +#include <unistd.h> + +#include <atf-c.h> + +#include "../h_macros.h" + +ATF_TC(traceme1); +ATF_TC_HEAD(traceme1, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Verify SIGSTOP followed by _exit(2) in a child"); +} + +ATF_TC_BODY(traceme1, tc) +{ + int status; + const int exitval = 5; + const int sigval = SIGSTOP; + pid_t child, wpid; + + printf("1: Before forking process PID=%d\n", getpid()); + ATF_REQUIRE((child = fork()) != -1); + if (child == 0) { + /* printf(3) messages from a child aren't intercepted by ATF */ + /* "2: Child process PID=%d\n", getpid() */ + + /* "2: Before calling ptrace(PT_TRACE_ME, ...)\n" */ + if (ptrace(PT_TRACE_ME, 0, NULL, 0) == -1) { + /* XXX: Is it safe to use ATF functions in a child? */ + err(EXIT_FAILURE, "2: ptrace(2) call failed with " + "status %s", sys_errlist[errno]); + } + + /* "2: Before raising SIGSTOP\n" */ + raise(sigval); + + /* "2: Before calling _exit(%d)\n", exitval */ + _exit(exitval); + } else { + printf("1: Parent process PID=%d, child's PID=%d\n", getpid(), + child); + + printf("1: Before calling waitpid() for the child\n"); + wpid = waitpid(child, &status, 0); + + printf("1: Validating child's PID (expected %d, got %d)\n", + child, wpid); + ATF_REQUIRE(child == wpid); + + printf("1: Ensuring that the child has not been exited\n"); + ATF_REQUIRE(!WIFEXITED(status)); + + printf("1: Ensuring that the child has not been continued\n"); + ATF_REQUIRE(!WIFCONTINUED(status)); + + printf("1: Ensuring that the child has not been terminated " + "with a signal\n"); + ATF_REQUIRE(!WIFSIGNALED(status)); + + printf("1: Ensuring that the child has been stopped\n"); + ATF_REQUIRE(WIFSTOPPED(status)); + + printf("1: Verifying that he child has been stopped with the" + " %s signal (received %s)\n", sys_signame[sigval], + sys_signame[WSTOPSIG(status)]); + ATF_REQUIRE(WSTOPSIG(status) == sigval); + + printf("1: Before resuming the child process where it left " + "off and without signal to be sent\n"); + ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); + + printf("1: Before calling waitpid() for the child\n"); + wpid = waitpid(child, &status, 0); + + printf("1: Validating that child's PID is still there\n"); + ATF_REQUIRE(wpid == child); + + printf("1: Ensuring that the child has been exited\n"); + ATF_REQUIRE(WIFEXITED(status)); + + printf("1: Ensuring that the child has not been continued\n"); + ATF_REQUIRE(!WIFCONTINUED(status)); + + printf("1: Ensuring that the child has not been terminated " + "with a signal\n"); + ATF_REQUIRE(!WIFSIGNALED(status)); + + printf("1: Ensuring that the child has not been stopped\n"); + ATF_REQUIRE(!WIFSTOPPED(status)); + + printf("1: Verifying that he child has exited with the " + "%d status (received %d)\n", exitval, WEXITSTATUS(status)); + ATF_REQUIRE(WEXITSTATUS(status) == exitval); + + printf("1: Before calling waitpid() for the exited child\n"); + wpid = waitpid(child, &status, 0); + + printf("1: Validating that child's PID no longer exists\n"); + ATF_REQUIRE(wpid == -1); + + printf("1: Validating that errno is set to %s (got %s)\n", + sys_errlist[ECHILD], sys_errlist[errno]); + ATF_REQUIRE(errno == ECHILD); + } + +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, traceme1); + + return atf_no_error(); +} |
