1*699cd480SApple OSS Distributions #include <fcntl.h> 2*699cd480SApple OSS Distributions #include <sys/fcntl.h> 3*699cd480SApple OSS Distributions #include <darwintest.h> 4*699cd480SApple OSS Distributions #include <darwintest_utils.h> 5*699cd480SApple OSS Distributions 6*699cd480SApple OSS Distributions 7*699cd480SApple OSS Distributions T_GLOBAL_META( 8*699cd480SApple OSS Distributions T_META_NAMESPACE("xnu.ipc"), 9*699cd480SApple OSS Distributions T_META_RADAR_COMPONENT_NAME("xnu"), 10*699cd480SApple OSS Distributions T_META_RADAR_COMPONENT_VERSION("IPC"), 11*699cd480SApple OSS Distributions T_META_OWNER("jonathan_w_adams"), 12*699cd480SApple OSS Distributions T_META_RUN_CONCURRENTLY(TRUE)); 13*699cd480SApple OSS Distributions 14*699cd480SApple OSS Distributions /* 15*699cd480SApple OSS Distributions * See rdar://77264182: xnu's lockf implementation had trouble 16*699cd480SApple OSS Distributions * with l_len = 0 (e.g. go to EOF) being treated differently 17*699cd480SApple OSS Distributions * than (l_start + l_len - 1) == OFF_MAX, even though they are 18*699cd480SApple OSS Distributions * effectively the same thing. ~25 loops of this test was enough 19*699cd480SApple OSS Distributions * to get an Intel mac into an infinite loop in the kernel. 20*699cd480SApple OSS Distributions */ 21*699cd480SApple OSS Distributions T_DECL(lockf_EOF_77264182, 22*699cd480SApple OSS Distributions "try to stress out lockf requests around OFF_MAX/EOF", 23*699cd480SApple OSS Distributions T_META_CHECK_LEAKS(false)) 24*699cd480SApple OSS Distributions { 25*699cd480SApple OSS Distributions const char *dir = dt_tmpdir(); 26*699cd480SApple OSS Distributions int fd; 27*699cd480SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(chdir(dir), "chdir(%s)", dir); 28*699cd480SApple OSS Distributions 29*699cd480SApple OSS Distributions T_ASSERT_POSIX_SUCCESS((fd = open("lockf_EOF_test", O_CREAT | O_RDWR, 0666)), "open(lockf_EOF_test)"); 30*699cd480SApple OSS Distributions 31*699cd480SApple OSS Distributions /* 32*699cd480SApple OSS Distributions * At each loop, we do: 33*699cd480SApple OSS Distributions * write lock [OFF_MAX - loop, EOF) 34*699cd480SApple OSS Distributions * unlock [OFF_MAX - loop, OFF_MAX) 35*699cd480SApple OSS Distributions * write lock [OFF_MAX - loop - 1, OFF_MAX) 36*699cd480SApple OSS Distributions */ 37*699cd480SApple OSS Distributions int loops; 38*699cd480SApple OSS Distributions for (loops = 0; loops < 100; loops++) { 39*699cd480SApple OSS Distributions struct flock fl = { 40*699cd480SApple OSS Distributions .l_start = OFF_MAX - loops, 41*699cd480SApple OSS Distributions .l_len = 0, 42*699cd480SApple OSS Distributions .l_pid = getpid(), 43*699cd480SApple OSS Distributions .l_type = F_WRLCK, 44*699cd480SApple OSS Distributions .l_whence = SEEK_SET 45*699cd480SApple OSS Distributions }; 46*699cd480SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(fcntl(fd, F_SETLK, &fl), "wrlock"); 47*699cd480SApple OSS Distributions fl.l_len = OFF_MAX - fl.l_start + 1; 48*699cd480SApple OSS Distributions fl.l_type = F_UNLCK; 49*699cd480SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(fcntl(fd, F_SETLK, &fl), "unlock"); 50*699cd480SApple OSS Distributions fl.l_start--; 51*699cd480SApple OSS Distributions fl.l_len++; 52*699cd480SApple OSS Distributions fl.l_type = F_WRLCK; 53*699cd480SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(fcntl(fd, F_SETLK, &fl), "wrlock 2"); 54*699cd480SApple OSS Distributions } 55*699cd480SApple OSS Distributions T_PASS("did %d loops", loops); 56*699cd480SApple OSS Distributions } 57