projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| c3c9b80d A |
1 | #include <darwintest.h> |
| 2 | #include <pthread/private.h> | |
| 3 | #include <sys/sysctl.h> | |
| 4 | #include "exc_helpers.h" | |
| 5 | ||
| 6 | T_GLOBAL_META( | |
| 7 | T_META_NAMESPACE("xnu.ipc"), | |
| 8 | T_META_RUN_CONCURRENTLY(true)); | |
| 9 | ||
| 10 | static size_t | |
| 11 | exc_immovable_handler( | |
| 12 | mach_port_t task, | |
| 13 | mach_port_t thread, | |
| 14 | __unused exception_type_t type, | |
| 15 | __unused mach_exception_data_t codes) | |
| 16 | { | |
| 17 | T_EXPECT_EQ(task, mach_task_self(), "Received immovable task port"); | |
| 18 | T_EXPECT_EQ(thread, pthread_mach_thread_np(pthread_main_thread_np()), | |
| 19 | "Received immovable thread port"); | |
| 20 | T_END; | |
| 21 | } | |
| 22 | ||
| 23 | T_DECL(exc_immovable, "Test that exceptions receive immovable ports") | |
| 24 | { | |
| 25 | mach_port_t exc_port = create_exception_port(EXC_MASK_BAD_ACCESS); | |
| 26 | uint32_t opts = 0; | |
| 27 | size_t size = sizeof(&opts); | |
| 28 | mach_port_t mp; | |
| 29 | kern_return_t kr; | |
| 30 | ||
| 31 | T_LOG("Check if task_exc_guard exception has been enabled\n"); | |
| 32 | int ret = sysctlbyname("kern.ipc_control_port_options", &opts, &size, NULL, 0); | |
| 33 | T_EXPECT_POSIX_SUCCESS(ret, "sysctlbyname(kern.ipc_control_port_options)"); | |
| 34 | ||
| 35 | if ((opts & 0x30) == 0) { | |
| 36 | T_SKIP("immovable rights aren't enabled"); | |
| 37 | } | |
| 38 | ||
| 39 | kr = task_get_special_port(mach_task_self(), TASK_KERNEL_PORT, &mp); | |
| 40 | T_EXPECT_MACH_SUCCESS(kr, "task_get_special_port"); | |
| 41 | T_EXPECT_NE(mp, mach_task_self(), "should receive movable port"); | |
| 42 | ||
| 43 | /* | |
| 44 | * do not deallocate the port we received on purpose to check | |
| 45 | * that the exception will not coalesce with the movable port | |
| 46 | * we have in our space now | |
| 47 | */ | |
| 48 | ||
| 49 | run_exception_handler(exc_port, exc_immovable_handler); | |
| 50 | *(void *volatile*)0 = 0; | |
| 51 | } |