1*f6217f89SApple OSS Distributions #include <stdio.h> 2*f6217f89SApple OSS Distributions #include <mach/mach_vm.h> 3*f6217f89SApple OSS Distributions #include <mach/mach_port.h> 4*f6217f89SApple OSS Distributions #include <mach/mach_error.h> 5*f6217f89SApple OSS Distributions #include <sys/sysctl.h> 6*f6217f89SApple OSS Distributions #include <sys/wait.h> 7*f6217f89SApple OSS Distributions #include <unistd.h> 8*f6217f89SApple OSS Distributions 9*f6217f89SApple OSS Distributions #ifdef T_NAMESPACE 10*f6217f89SApple OSS Distributions #undef T_NAMESPACE 11*f6217f89SApple OSS Distributions #endif 12*f6217f89SApple OSS Distributions 13*f6217f89SApple OSS Distributions #include <darwintest.h> 14*f6217f89SApple OSS Distributions #include <darwintest_utils.h> 15*f6217f89SApple OSS Distributions 16*f6217f89SApple OSS Distributions T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true), 17*f6217f89SApple OSS Distributions T_META_NAMESPACE("xnu.ipc"), 18*f6217f89SApple OSS Distributions T_META_RADAR_COMPONENT_NAME("xnu"), 19*f6217f89SApple OSS Distributions T_META_RADAR_COMPONENT_VERSION("IPC"), 20*f6217f89SApple OSS Distributions T_META_TAG_VM_PREFERRED); 21*f6217f89SApple OSS Distributions 22*f6217f89SApple OSS Distributions T_DECL(test_task_filter_msg_flag, "Set the filter msg flag on the task and check if the forked child inherits it", 23*f6217f89SApple OSS Distributions T_META_ASROOT(true), T_META_CHECK_LEAKS(false)) 24*f6217f89SApple OSS Distributions { 25*f6217f89SApple OSS Distributions int ret, dev; 26*f6217f89SApple OSS Distributions size_t sysctl_size; 27*f6217f89SApple OSS Distributions 28*f6217f89SApple OSS Distributions T_SETUPBEGIN; 29*f6217f89SApple OSS Distributions 30*f6217f89SApple OSS Distributions dev = 0; 31*f6217f89SApple OSS Distributions sysctl_size = sizeof(dev); 32*f6217f89SApple OSS Distributions ret = sysctlbyname("kern.development", &dev, &sysctl_size, NULL, 0); 33*f6217f89SApple OSS Distributions T_QUIET; T_ASSERT_POSIX_SUCCESS(ret, "sysctl kern.development failed"); 34*f6217f89SApple OSS Distributions if (dev == 0) { 35*f6217f89SApple OSS Distributions T_SKIP("Skipping test on release kernel"); 36*f6217f89SApple OSS Distributions } 37*f6217f89SApple OSS Distributions 38*f6217f89SApple OSS Distributions T_SETUPEND; 39*f6217f89SApple OSS Distributions 40*f6217f89SApple OSS Distributions int cur_filter_flag = 0; 41*f6217f89SApple OSS Distributions int new_filter_flag = 1; 42*f6217f89SApple OSS Distributions ret = sysctlbyname("kern.task_set_filter_msg_flag", NULL, 0, &new_filter_flag, sizeof(new_filter_flag)); 43*f6217f89SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(ret, "sysctlbyname"); 44*f6217f89SApple OSS Distributions ret = sysctlbyname("kern.task_set_filter_msg_flag", &cur_filter_flag, &sysctl_size, NULL, 0); 45*f6217f89SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(ret, "sysctlbyname"); 46*f6217f89SApple OSS Distributions T_ASSERT_EQ(cur_filter_flag, 1, "Task should have filtering on"); 47*f6217f89SApple OSS Distributions 48*f6217f89SApple OSS Distributions pid_t pid = fork(); 49*f6217f89SApple OSS Distributions if (pid == 0) { 50*f6217f89SApple OSS Distributions cur_filter_flag = 0; 51*f6217f89SApple OSS Distributions ret = sysctlbyname("kern.task_set_filter_msg_flag", &cur_filter_flag, &sysctl_size, NULL, 0); 52*f6217f89SApple OSS Distributions if (ret == 0) { 53*f6217f89SApple OSS Distributions if (cur_filter_flag == 1) { 54*f6217f89SApple OSS Distributions exit(0); 55*f6217f89SApple OSS Distributions } 56*f6217f89SApple OSS Distributions } 57*f6217f89SApple OSS Distributions exit(1); 58*f6217f89SApple OSS Distributions } 59*f6217f89SApple OSS Distributions 60*f6217f89SApple OSS Distributions int status; 61*f6217f89SApple OSS Distributions ret = waitpid(pid, &status, 0); 62*f6217f89SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(ret, "waitpid"); 63*f6217f89SApple OSS Distributions 64*f6217f89SApple OSS Distributions if (WIFEXITED(status)) { 65*f6217f89SApple OSS Distributions const int exit_code = WEXITSTATUS(status); 66*f6217f89SApple OSS Distributions T_ASSERT_EQ(exit_code, 0, "Child inherited the filter msg flag"); 67*f6217f89SApple OSS Distributions } 68*f6217f89SApple OSS Distributions 69*f6217f89SApple OSS Distributions /* Turn off task msg filtering */ 70*f6217f89SApple OSS Distributions cur_filter_flag = 1; 71*f6217f89SApple OSS Distributions new_filter_flag = 0; 72*f6217f89SApple OSS Distributions ret = sysctlbyname("kern.task_set_filter_msg_flag", &cur_filter_flag, &sysctl_size, &new_filter_flag, sizeof(new_filter_flag)); 73*f6217f89SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(ret, "sysctlbyname"); 74*f6217f89SApple OSS Distributions T_ASSERT_EQ(cur_filter_flag, 1, "Task should have filtering on"); 75*f6217f89SApple OSS Distributions 76*f6217f89SApple OSS Distributions T_END; 77*f6217f89SApple OSS Distributions } 78