Date: Wed, 18 Sep 2019 21:00:32 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r352495 - head/tests/sys/vm Message-ID: <201909182100.x8IL0WwD083145@repo.freebsd.org>
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Author: jilles Date: Wed Sep 18 21:00:32 2019 New Revision: 352495 URL: https://svnweb.freebsd.org/changeset/base/352495 Log: Add some tests for page fault signals and codes It is useful to have some tests for page fault signals. More tests would be useful but creating the conditions (such as various kinds of running out of memory and I/O errors) is more complicated. The tests page_fault_signal__bus_objerr_1 and page_fault_signal__bus_objerr_2 depend on https://reviews.freebsd.org/D21566 before they can pass. PR: 211924 Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D21624 Added: head/tests/sys/vm/page_fault_signal.c (contents, props changed) Modified: head/tests/sys/vm/Makefile Modified: head/tests/sys/vm/Makefile ============================================================================== --- head/tests/sys/vm/Makefile Wed Sep 18 19:53:58 2019 (r352494) +++ head/tests/sys/vm/Makefile Wed Sep 18 21:00:32 2019 (r352495) @@ -5,6 +5,7 @@ PACKAGE= tests TESTSDIR= ${TESTSBASE}/sys/vm ATF_TESTS_C+= mlock_test \ - mmap_test + mmap_test \ + page_fault_signal .include <bsd.test.mk> Added: head/tests/sys/vm/page_fault_signal.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tests/sys/vm/page_fault_signal.c Wed Sep 18 21:00:32 2019 (r352495) @@ -0,0 +1,184 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2019 Jilles Tjoelker + * + * 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 AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#include <sys/mman.h> + +#include <atf-c.h> +#include <fcntl.h> +#include <setjmp.h> +#include <signal.h> +#include <stdio.h> + +static sigjmp_buf sig_env; +static volatile int last_sig, last_code; + +static void +sighandler(int sig, siginfo_t *info, void *context __unused) +{ + + last_sig = sig; + last_code = info->si_code; + siglongjmp(sig_env, 1); +} + +static void +setup_signals(void) +{ + struct sigaction sa; + int r; + + sa.sa_sigaction = sighandler; + sa.sa_flags = SA_RESTART | SA_RESETHAND | SA_SIGINFO; + r = sigfillset(&sa.sa_mask); + ATF_REQUIRE(r != -1); + r = sigaction(SIGILL, &sa, NULL); + ATF_REQUIRE(r != -1); + r = sigaction(SIGBUS, &sa, NULL); + ATF_REQUIRE(r != -1); + r = sigaction(SIGSEGV, &sa, NULL); + ATF_REQUIRE(r != -1); +} + +ATF_TC_WITHOUT_HEAD(page_fault_signal__segv_maperr_1); +ATF_TC_BODY(page_fault_signal__segv_maperr_1, tc) +{ + int *p; + int r; + int sz; + + sz = getpagesize(); + p = mmap(NULL, sz, PROT_READ, MAP_ANON, -1, 0); + ATF_REQUIRE(p != MAP_FAILED); + r = munmap(p, sz); + ATF_REQUIRE(r != -1); + if (sigsetjmp(sig_env, 1) == 0) { + setup_signals(); + *(volatile int *)p = 1; + } + ATF_CHECK_EQ(SIGSEGV, last_sig); + ATF_CHECK_EQ(SEGV_MAPERR, last_code); +} + +ATF_TC_WITHOUT_HEAD(page_fault_signal__segv_accerr_1); +ATF_TC_BODY(page_fault_signal__segv_accerr_1, tc) +{ + int *p; + int sz; + + sz = getpagesize(); + p = mmap(NULL, sz, PROT_READ, MAP_ANON, -1, 0); + ATF_REQUIRE(p != MAP_FAILED); + if (sigsetjmp(sig_env, 1) == 0) { + setup_signals(); + *(volatile int *)p = 1; + } + (void)munmap(p, sz); + ATF_CHECK_EQ(SIGSEGV, last_sig); + ATF_CHECK_EQ(SEGV_ACCERR, last_code); +} + +ATF_TC_WITHOUT_HEAD(page_fault_signal__segv_accerr_2); +ATF_TC_BODY(page_fault_signal__segv_accerr_2, tc) +{ + int *p; + volatile int dummy; + int sz; + + sz = getpagesize(); + p = mmap(NULL, sz, PROT_NONE, MAP_ANON, -1, 0); + ATF_REQUIRE(p != MAP_FAILED); + if (sigsetjmp(sig_env, 1) == 0) { + setup_signals(); + dummy = *p; + } + (void)munmap(p, sz); + ATF_CHECK_EQ(SIGSEGV, last_sig); + ATF_CHECK_EQ(SEGV_ACCERR, last_code); +} + +ATF_TC_WITHOUT_HEAD(page_fault_signal__bus_objerr_1); +ATF_TC_BODY(page_fault_signal__bus_objerr_1, tc) +{ + int *p; + int fd; + int sz; + + atf_tc_expect_fail("bug 211924"); + sz = getpagesize(); + fd = shm_open(SHM_ANON, O_RDWR | O_CREAT, 0600); + ATF_REQUIRE(fd != -1); + p = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + ATF_REQUIRE(p != MAP_FAILED); + if (sigsetjmp(sig_env, 1) == 0) { + setup_signals(); + *(volatile int *)p = 1; + } + (void)munmap(p, sz); + (void)close(fd); + ATF_CHECK_EQ(SIGBUS, last_sig); + ATF_CHECK_EQ(BUS_OBJERR, last_code); +} + +ATF_TC_WITHOUT_HEAD(page_fault_signal__bus_objerr_2); +ATF_TC_BODY(page_fault_signal__bus_objerr_2, tc) +{ + int *p; + int fd; + int r; + int sz; + + atf_tc_expect_fail("bug 211924"); + sz = getpagesize(); + fd = shm_open(SHM_ANON, O_RDWR | O_CREAT, 0600); + ATF_REQUIRE(fd != -1); + r = ftruncate(fd, sz); + ATF_REQUIRE(r != -1); + p = mmap(NULL, sz * 2, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + ATF_REQUIRE(p != MAP_FAILED); + if (sigsetjmp(sig_env, 1) == 0) { + setup_signals(); + ((volatile int *)p)[sz / sizeof(int)] = 1; + } + (void)munmap(p, sz * 2); + (void)close(fd); + ATF_CHECK_EQ(SIGBUS, last_sig); + ATF_CHECK_EQ(BUS_OBJERR, last_code); +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, page_fault_signal__segv_maperr_1); + ATF_TP_ADD_TC(tp, page_fault_signal__segv_accerr_1); + ATF_TP_ADD_TC(tp, page_fault_signal__segv_accerr_2); + ATF_TP_ADD_TC(tp, page_fault_signal__bus_objerr_1); + ATF_TP_ADD_TC(tp, page_fault_signal__bus_objerr_2); + + return (atf_no_error()); +}
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