1 #include <stdint.h> 2 #include <stdio.h> 3 #include <unistd.h> 4 5 #include <mach/mach.h> 6 #include <mach/mk_timer.h> 7 8 #include <darwintest.h> 9 10 T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true), 11 T_META_NAMESPACE("xnu.ipc"), 12 T_META_RADAR_COMPONENT_NAME("xnu"), 13 T_META_RADAR_COMPONENT_VERSION("IPC")); 14 15 T_DECL(mktimer_kobject, "mktimer_kobject()", T_META_ALL_VALID_ARCHS(true), T_META_IGNORECRASHES(".*mktimer_kobject.*"), T_META_TAG_VM_PREFERRED) 16 { 17 mach_port_t timer_port = MACH_PORT_NULL; 18 mach_port_t notify_port = MACH_PORT_NULL; 19 20 kern_return_t kr = KERN_SUCCESS; 21 task_exc_guard_behavior_t old, new; 22 23 /* 24 * Disable [optional] Mach port guard exceptions to avoid fatal crash 25 */ 26 kr = task_get_exc_guard_behavior(mach_task_self(), &old); 27 T_ASSERT_MACH_SUCCESS(kr, "task_get_exc_guard_behavior"); 28 new = (old & ~TASK_EXC_GUARD_MP_DELIVER); 29 kr = task_set_exc_guard_behavior(mach_task_self(), new); 30 T_ASSERT_MACH_SUCCESS(kr, "task_set_exc_guard_behavior new"); 31 32 /* 33 * timer port 34 * This is a receive right which is also a kobject 35 */ 36 timer_port = mk_timer_create(); 37 T_ASSERT_NE(timer_port, (mach_port_t)MACH_PORT_NULL, "mk_timer_create: %s", mach_error_string(kr)); 38 39 mach_port_set_context(mach_task_self(), timer_port, (mach_port_context_t) 0x1); 40 T_ASSERT_EQ(kr, KERN_SUCCESS, "mach_port_set_context(timer_port): %s", mach_error_string(kr)); 41 42 /* notification port for the mk_timer port to come back on */ 43 kr = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, ¬ify_port); 44 T_ASSERT_EQ(kr, KERN_SUCCESS, "mach_port_allocate(notify_port): %s", mach_error_string(kr)); 45 46 kr = mach_port_set_context(mach_task_self(), notify_port, (mach_port_context_t) 0x2); 47 T_ASSERT_EQ(kr, KERN_SUCCESS, "mach_port_set_context(notify_port): %s", mach_error_string(kr)); 48 49 T_LOG("timer: 0x%x, notify: 0x%x", timer_port, notify_port); 50 51 /* 52 * This code generates a mach port guard exception and should be tested with an exception catcher. 53 * Will be updated in <rdar://problem/70971318> 54 */ 55 mach_port_t previous = MACH_PORT_NULL; 56 57 /* request a port-destroyed notification on the timer port */ 58 kr = mach_port_request_notification(mach_task_self(), timer_port, MACH_NOTIFY_PORT_DESTROYED, 59 0, notify_port, MACH_MSG_TYPE_MAKE_SEND_ONCE, &previous); 60 /* this will ordinarily fail with a guard exception! */ 61 T_ASSERT_MACH_ERROR(kr, KERN_INVALID_RIGHT, "notifications should NOT work on mk_timer ports!"); 62 63 /* restore the old guard behavior */ 64 kr = task_set_exc_guard_behavior(mach_task_self(), old); 65 T_ASSERT_MACH_SUCCESS(kr, "task_set_exc_guard_behavior old"); 66 67 T_LOG("done"); 68 } 69