diff options
Diffstat (limited to 'tests/sys/vm/page_fault_signal.c')
| -rw-r--r-- | tests/sys/vm/page_fault_signal.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/tests/sys/vm/page_fault_signal.c b/tests/sys/vm/page_fault_signal.c new file mode 100644 index 000000000000..a698f0b064f0 --- /dev/null +++ b/tests/sys/vm/page_fault_signal.c @@ -0,0 +1,179 @@ +/*- + * 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. + */ + +#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; + 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(); + (void)*(volatile int *)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; + + 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; + + 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()); +} |