zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 Fujitsu Ltd. |
| 3 | * Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2 of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program. |
| 15 | */ |
| 16 | |
Cyril Hrubis | 50a1afe | 2014-01-09 13:54:56 +0100 | [diff] [blame] | 17 | #define _GNU_SOURCE |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 18 | #include <errno.h> |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 19 | #include <sched.h> |
| 20 | #include <sys/wait.h> |
| 21 | #include "test.h" |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 22 | #include "clone_platform.h" |
| 23 | #include "safe_macros.h" |
| 24 | #include "linux_syscall_numbers.h" |
| 25 | |
Zeng Linggang | 1db6266 | 2014-01-09 20:10:11 +0800 | [diff] [blame] | 26 | char *TCID = "clone08"; |
| 27 | |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 28 | static pid_t ptid, ctid, tgid; |
| 29 | static void *child_stack; |
| 30 | |
| 31 | static void setup(void); |
| 32 | static void cleanup(void); |
| 33 | |
| 34 | static void test_clone_parent(int t); |
| 35 | static int child_clone_parent(void); |
| 36 | static pid_t parent_ppid; |
| 37 | |
| 38 | static void test_clone_tid(int t); |
| 39 | static int child_clone_child_settid(void); |
| 40 | static int child_clone_parent_settid(void); |
| 41 | |
| 42 | #ifdef CLONE_STOPPED |
| 43 | static void test_clone_stopped(int t); |
| 44 | static int child_clone_stopped(void); |
| 45 | static int stopped_flag; |
| 46 | #endif |
| 47 | |
| 48 | static void test_clone_thread(int t); |
| 49 | static int child_clone_thread(void); |
| 50 | static int tst_result; |
| 51 | |
| 52 | /* |
| 53 | * Children cloned with CLONE_VM should avoid using any functions that |
| 54 | * might require dl_runtime_resolve, because they share thread-local |
| 55 | * storage with parent. If both try to resolve symbols at same time you |
| 56 | * can crash, likely at _dl_x86_64_restore_sse(). |
| 57 | * See this thread for relevant discussion: |
| 58 | * http://www.mail-archive.com/utrace-devel@redhat.com/msg01944.html |
| 59 | */ |
| 60 | static struct test_case { |
| 61 | char *name; |
| 62 | int flags; |
| 63 | void (*testfunc)(int); |
| 64 | int (*do_child)(); |
| 65 | } test_cases[] = { |
| 66 | {"CLONE_PARENT", CLONE_PARENT | SIGCHLD, |
| 67 | test_clone_parent, child_clone_parent}, |
| 68 | {"CLONE_CHILD_SETTID", CLONE_CHILD_SETTID | SIGCHLD, |
| 69 | test_clone_tid, child_clone_child_settid}, |
| 70 | {"CLONE_PARENT_SETTID", CLONE_PARENT_SETTID | CLONE_VM | SIGCHLD, |
| 71 | test_clone_tid, child_clone_parent_settid}, |
| 72 | #ifdef CLONE_STOPPED |
| 73 | {"CLONE_STOPPED", CLONE_STOPPED | CLONE_VM | SIGCHLD, |
| 74 | test_clone_stopped, child_clone_stopped}, |
| 75 | #endif |
| 76 | {"CLONE_THREAD", CLONE_THREAD | CLONE_SIGHAND | CLONE_VM | SIGCHLD, |
| 77 | test_clone_thread, child_clone_thread}, |
| 78 | }; |
| 79 | |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 80 | int TST_TOTAL = ARRAY_SIZE(test_cases); |
| 81 | |
| 82 | int main(int ac, char **av) |
| 83 | { |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 84 | const char *msg; |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 85 | int i, lc; |
| 86 | |
| 87 | msg = parse_opts(ac, av, NULL, NULL); |
| 88 | if (msg != NULL) |
| 89 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| 90 | |
| 91 | setup(); |
| 92 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 93 | tst_count = 0; |
| 94 | for (i = 0; i < TST_TOTAL; i++) { |
| 95 | tst_resm(TINFO, "running %s", test_cases[i].name); |
| 96 | test_cases[i].testfunc(i); |
| 97 | } |
| 98 | } |
| 99 | cleanup(); |
| 100 | tst_exit(); |
| 101 | } |
| 102 | |
| 103 | static void setup(void) |
| 104 | { |
| 105 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 106 | |
| 107 | TEST_PAUSE; |
| 108 | |
| 109 | tst_tmpdir(); |
| 110 | |
| 111 | child_stack = SAFE_MALLOC(cleanup, CHILD_STACK_SIZE); |
| 112 | } |
| 113 | |
| 114 | static void cleanup(void) |
| 115 | { |
| 116 | free(child_stack); |
| 117 | |
| 118 | tst_rmdir(); |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static long clone_child(const struct test_case *t, int use_tst) |
| 122 | { |
Zeng Linggang | 1db6266 | 2014-01-09 20:10:11 +0800 | [diff] [blame] | 123 | TEST(ltp_clone7(t->flags, t->do_child, NULL, CHILD_STACK_SIZE, |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 124 | child_stack, &ptid, NULL, &ctid)); |
Zeng Linggang | 1db6266 | 2014-01-09 20:10:11 +0800 | [diff] [blame] | 125 | |
| 126 | if (TEST_RETURN == -1 && TTERRNO == ENOSYS) |
| 127 | tst_brkm(TCONF, cleanup, "clone does not support 7 args"); |
| 128 | |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 129 | if (TEST_RETURN == -1) { |
| 130 | if (use_tst) { |
| 131 | tst_brkm(TBROK | TTERRNO, cleanup, "%s clone() failed", |
| 132 | t->name); |
| 133 | } else { |
| 134 | printf("%s clone() failed, errno: %d", |
| 135 | t->name, TEST_ERRNO); |
| 136 | exit(1); |
| 137 | } |
| 138 | } |
| 139 | return TEST_RETURN; |
| 140 | } |
| 141 | |
| 142 | static int wait4child(pid_t child) |
| 143 | { |
| 144 | int status; |
| 145 | |
| 146 | if (waitpid(child, &status, 0) == -1) |
| 147 | tst_resm(TBROK|TERRNO, "waitpid"); |
| 148 | if (WIFEXITED(status)) |
| 149 | return WEXITSTATUS(status); |
| 150 | else |
| 151 | return status; |
| 152 | } |
| 153 | |
| 154 | static void test_clone_parent(int t) |
| 155 | { |
| 156 | int status; |
| 157 | pid_t child; |
| 158 | |
| 159 | fflush(stdout); |
| 160 | child = FORK_OR_VFORK(); |
| 161 | switch (child) { |
| 162 | case 0: |
| 163 | parent_ppid = getppid(); |
| 164 | clone_child(&test_cases[t], 0); |
| 165 | exit(0); |
| 166 | case -1: |
| 167 | tst_brkm(TBROK | TERRNO, NULL, "test_clone_parent fork"); |
| 168 | default: |
| 169 | status = wait4child(child); |
| 170 | if (status == 0) { |
| 171 | /* wait for CLONE_PARENT child */ |
| 172 | status = wait4child(-1); |
| 173 | if (status == 0) { |
| 174 | tst_resm(TPASS, "test %s", test_cases[t].name); |
| 175 | } else { |
| 176 | tst_resm(TFAIL, "test %s, status: %d", |
| 177 | test_cases[t].name, status); |
| 178 | } |
| 179 | } else { |
| 180 | tst_resm(TFAIL, "test %s, status: %d", |
| 181 | test_cases[t].name, status); |
| 182 | } |
| 183 | }; |
| 184 | } |
| 185 | |
| 186 | static int child_clone_parent(void) |
| 187 | { |
| 188 | if (parent_ppid == getppid()) |
| 189 | exit(0); |
| 190 | printf("FAIL: getppid != parent_ppid (%d != %d)\n", |
| 191 | parent_ppid, getppid()); |
| 192 | exit(1); |
| 193 | } |
| 194 | |
| 195 | static void test_clone_tid(int t) |
| 196 | { |
| 197 | int status; |
| 198 | pid_t child; |
| 199 | |
| 200 | child = clone_child(&test_cases[t], 1); |
| 201 | status = wait4child(child); |
| 202 | if (status == 0) { |
| 203 | tst_resm(TPASS, "test %s", test_cases[t].name); |
| 204 | } else { |
| 205 | tst_resm(TFAIL, "test %s, status: %d", |
| 206 | test_cases[t].name, status); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | static int child_clone_child_settid(void) |
| 211 | { |
| 212 | if (ctid == ltp_syscall(__NR_getpid)) |
| 213 | ltp_syscall(__NR_exit, 0); |
| 214 | printf("FAIL: ctid != getpid() (%d != %d)\n", |
| 215 | ctid, getpid()); |
| 216 | ltp_syscall(__NR_exit, 1); |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static int child_clone_parent_settid(void) |
| 221 | { |
| 222 | if (ptid == ltp_syscall(__NR_getpid)) |
| 223 | ltp_syscall(__NR_exit, 0); |
| 224 | printf("FAIL: ptid != getpid() (%d != %d)\n", |
| 225 | ptid, getpid()); |
| 226 | ltp_syscall(__NR_exit, 1); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | #ifdef CLONE_STOPPED |
| 231 | static void test_clone_stopped(int t) |
| 232 | { |
| 233 | int i; |
| 234 | int status; |
| 235 | int flag; |
| 236 | pid_t child; |
| 237 | |
Shuang Qiu | dc054fb | 2014-04-30 14:53:45 +0800 | [diff] [blame] | 238 | if (tst_kvercmp(2, 6, 38) >= 0) { |
| 239 | tst_resm(TINFO, "CLONE_STOPPED skipped for kernels >= 2.6.38"); |
| 240 | return; |
| 241 | } |
| 242 | |
zenglg.jy | 853f981 | 2013-12-18 17:32:15 +0800 | [diff] [blame] | 243 | stopped_flag = 0; |
| 244 | child = clone_child(&test_cases[t], 1); |
| 245 | |
| 246 | /* give the kernel scheduler chance to run the CLONE_STOPPED thread*/ |
| 247 | for (i = 0; i < 100; i++) { |
| 248 | sched_yield(); |
| 249 | usleep(1000); |
| 250 | } |
| 251 | |
| 252 | flag = stopped_flag; |
| 253 | if (kill(child, SIGCONT) != 0) |
| 254 | tst_brkm(TBROK | TERRNO, cleanup, "kill SIGCONT failed"); |
| 255 | |
| 256 | status = wait4child(child); |
| 257 | if (status == 0 && flag == 0) { |
| 258 | tst_resm(TPASS, "test %s", test_cases[t].name); |
| 259 | } else { |
| 260 | tst_resm(TFAIL, "test %s, status: %d, flag: %d", |
| 261 | test_cases[t].name, status, flag); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | static int child_clone_stopped(void) |
| 266 | { |
| 267 | stopped_flag = 1; |
| 268 | ltp_syscall(__NR_exit, 0); |
| 269 | return 0; |
| 270 | } |
| 271 | #endif |
| 272 | |
| 273 | static void test_clone_thread(int t) |
| 274 | { |
| 275 | pid_t child; |
| 276 | int i, status; |
| 277 | |
| 278 | fflush(stdout); |
| 279 | child = FORK_OR_VFORK(); |
| 280 | switch (child) { |
| 281 | case 0: |
| 282 | tgid = ltp_syscall(__NR_getpid); |
| 283 | tst_result = -1; |
| 284 | clone_child(&test_cases[t], 0); |
| 285 | |
| 286 | for (i = 0; i < 5000; i++) { |
| 287 | sched_yield(); |
| 288 | usleep(1000); |
| 289 | if (tst_result != -1) |
| 290 | break; |
| 291 | } |
| 292 | ltp_syscall(__NR_exit, tst_result); |
| 293 | case -1: |
| 294 | tst_brkm(TBROK | TERRNO, NULL, "test_clone_thread fork"); |
| 295 | default: |
| 296 | status = wait4child(child); |
| 297 | if (status == 0) { |
| 298 | tst_resm(TPASS, "test %s", test_cases[t].name); |
| 299 | } else { |
| 300 | tst_resm(TFAIL, "test %s, status: %d", |
| 301 | test_cases[t].name, status); |
| 302 | } |
| 303 | }; |
| 304 | } |
| 305 | |
| 306 | static int child_clone_thread(void) |
| 307 | { |
| 308 | if (tgid == ltp_syscall(__NR_getpid)) |
| 309 | tst_result = TPASS; |
| 310 | else |
| 311 | tst_result = TFAIL; |
| 312 | ltp_syscall(__NR_exit, 0); |
| 313 | return 0; |
| 314 | } |