diff options
Diffstat (limited to 'tests/sys/kern/basic_signal.c')
| -rw-r--r-- | tests/sys/kern/basic_signal.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/tests/sys/kern/basic_signal.c b/tests/sys/kern/basic_signal.c new file mode 100644 index 000000000000..1dcb9ff064fc --- /dev/null +++ b/tests/sys/kern/basic_signal.c @@ -0,0 +1,225 @@ +/*- + * Copyright (c) 2021 M. Warner Losh <imp@FreeBSD.org> + * + * SPDX-License-Identifier: BSD-2-Clause + */ + +#include <atf-c.h> +#include <errno.h> +#include <signal.h> +#include <stdbool.h> +#include <stdlib.h> + +#if defined(__aarch64__) +#include <machine/armreg.h> +#define SET_TRACE_FLAG(ucp) (ucp)->uc_mcontext.mc_gpregs.gp_spsr |= PSR_SS +#define CLR_TRACE_FLAG(ucp) (ucp)->uc_mcontext.mc_gpregs.gp_spsr &= ~PSR_SS +#elif defined(__amd64__) +#include <machine/psl.h> +#define SET_TRACE_FLAG(ucp) (ucp)->uc_mcontext.mc_rflags |= PSL_T +#define CLR_TRACE_FLAG(ucp) (ucp)->uc_mcontext.mc_rflags &= ~PSL_T +#elif defined(__i386__) +#include <machine/psl.h> +#define SET_TRACE_FLAG(ucp) (ucp)->uc_mcontext.mc_eflags |= PSL_T +#define CLR_TRACE_FLAG(ucp) (ucp)->uc_mcontext.mc_eflags &= ~PSL_T +#endif + +static volatile sig_atomic_t signal_fired = 0; + +static void +sig_handler(int signo, siginfo_t *info __unused, void *ucp __unused) +{ + signal_fired++; +} + +ATF_TC(signal_test); + +ATF_TC_HEAD(signal_test, tc) +{ + + atf_tc_set_md_var(tc, "descr", "Testing delivery of a signal"); +} + +ATF_TC_BODY(signal_test, tc) +{ + /* + * Setup the signal handlers + */ + struct sigaction sa = { + .sa_sigaction = sig_handler, + .sa_flags = SA_SIGINFO, + }; + ATF_REQUIRE(sigemptyset(&sa.sa_mask) == 0); + ATF_REQUIRE(sigaction(SIGUSR1, &sa, NULL) == 0); + ATF_REQUIRE(sigaction(SIGUSR2, &sa, NULL) == 0); + ATF_REQUIRE(sigaction(SIGALRM, &sa, NULL) == 0); + + /* + * Fire SIGUSR1 + */ + ATF_CHECK(signal_fired == 0); + ATF_REQUIRE(raise(SIGUSR1) == 0); + ATF_CHECK(signal_fired == 1); + + /* + * Fire SIGUSR2 + */ + ATF_REQUIRE(raise(SIGUSR2) == 0); + ATF_CHECK(signal_fired == 2); + + /* + * Fire SIGALRM after a timeout + */ + ATF_REQUIRE(alarm(1) == 0); + ATF_REQUIRE(pause() == -1); + ATF_REQUIRE(errno == EINTR); + ATF_CHECK(signal_fired == 3); +} + +/* + * Check setting the machine dependent single step flag works when supported. + */ +#ifdef SET_TRACE_FLAG +static volatile sig_atomic_t trap_signal_fired = 0; + +static void +trap_sig_handler(int signo, siginfo_t *info __unused, void *_ucp) +{ + ucontext_t *ucp = _ucp; + + if (trap_signal_fired < 9) { + SET_TRACE_FLAG(ucp); + } else { + CLR_TRACE_FLAG(ucp); + } + trap_signal_fired++; +} + +ATF_TC(trap_signal_test); + +ATF_TC_HEAD(trap_signal_test, tc) +{ + + atf_tc_set_md_var(tc, "descr", + "Testing signal handler setting the MD single step flag"); +} + +ATF_TC_BODY(trap_signal_test, tc) +{ + /* + * Setup the signal handlers + */ + struct sigaction sa = { + .sa_sigaction = trap_sig_handler, + .sa_flags = SA_SIGINFO, + }; + ATF_REQUIRE(sigemptyset(&sa.sa_mask) == 0); + ATF_REQUIRE(sigaction(SIGTRAP, &sa, NULL) == 0); + + /* + * Fire SIGTRAP + */ + ATF_CHECK(trap_signal_fired == 0); + ATF_REQUIRE(raise(SIGTRAP) == 0); + ATF_CHECK(trap_signal_fired == 10); +} +#endif + +/* + * Special tests for 32-bit arm. We can call thumb code (really just t32) from + * normal (a32) mode and vice versa. Likewise, signals can interrupt a T32 + * context with A32 code and vice versa. Make sure these all work with a simple + * test that raises the signal and ensures that it executed. No other platform + * has these requirements. Also note: we only support thumb2, so there's no T16 + * vs T32 issues we have to test for. + */ +#ifdef __arm__ + +#define a32_isa __attribute__((target("arm"))) +#define t32_isa __attribute__((target("thumb"))) + +static volatile sig_atomic_t t32_fired = 0; +static volatile sig_atomic_t a32_fired = 0; + +a32_isa static void +sig_a32(int signo, siginfo_t *info __unused, void *ucp __unused) +{ + a32_fired++; +} + +t32_isa static void +sig_t32(int signo, siginfo_t *info __unused, void *ucp __unused) +{ + t32_fired++; +} + + +ATF_TC(signal_test_T32_to_A32); + +ATF_TC_HEAD(signal_test_T32_to_A32, tc) +{ + + atf_tc_set_md_var(tc, "descr", "Testing delivery of a signal from T32 to A32"); +} + +t32_isa ATF_TC_BODY(signal_test_T32_to_A32, tc) +{ + /* + * Setup the signal handlers + */ + struct sigaction sa = { + .sa_sigaction = sig_a32, + .sa_flags = SA_SIGINFO, + }; + ATF_REQUIRE(sigemptyset(&sa.sa_mask) == 0); + ATF_REQUIRE(sigaction(SIGUSR1, &sa, NULL) == 0); + + ATF_REQUIRE((((uintptr_t)sig_a32) & 1) == 0); /* Make sure compiled as not thumb */ + + ATF_CHECK(a32_fired == 0); + ATF_REQUIRE(raise(SIGUSR1) == 0); + ATF_CHECK(a32_fired == 1); +} + +ATF_TC(signal_test_A32_to_T32); + +ATF_TC_HEAD(signal_test_A32_to_T32, tc) +{ + + atf_tc_set_md_var(tc, "descr", "Testing delivery of a signal from A32 to T32"); +} + +a32_isa ATF_TC_BODY(signal_test_A32_to_T32, tc) +{ + /* + * Setup the signal handlers + */ + struct sigaction sa = { + .sa_sigaction = sig_t32, + .sa_flags = SA_SIGINFO, + }; + ATF_REQUIRE(sigemptyset(&sa.sa_mask) == 0); + ATF_REQUIRE(sigaction(SIGUSR1, &sa, NULL) == 0); + + ATF_REQUIRE((((uintptr_t)sig_t32) & 1) == 1); /* Make sure compiled as thumb */ + + ATF_CHECK(t32_fired == 0); + ATF_REQUIRE(raise(SIGUSR1) == 0); + ATF_CHECK(t32_fired == 1); +} +#endif + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, signal_test); +#ifdef SET_TRACE_FLAG + ATF_TP_ADD_TC(tp, trap_signal_test); +#endif +#ifdef __arm__ + ATF_TP_ADD_TC(tp, signal_test_T32_to_A32); + ATF_TP_ADD_TC(tp, signal_test_A32_to_T32); +#endif + + return (atf_no_error()); +} |