vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License along |
Wanlong Gao | fed9641 | 2012-10-24 10:10:29 +0800 | [diff] [blame] | 13 | * with this program; if not, write the Free Software Foundation, Inc., |
| 14 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 15 | * |
| 16 | */ |
| 17 | /********************************************************** |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 18 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 19 | * TEST IDENTIFIER : ptrace01 |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 20 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 21 | * EXECUTED BY : anyone |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 22 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 23 | * TEST TITLE : functionality test for ptrace(2) |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 24 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 25 | * TEST CASE TOTAL : 2 |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 26 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 27 | * AUTHOR : Saji Kumar.V.R <saji.kumar@wipro.com> |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 28 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 29 | * SIGNALS |
| 30 | * Uses SIGUSR1 to pause before test if option set. |
| 31 | * (See the parse_opts(3) man page). |
| 32 | * |
| 33 | * DESCRIPTION |
| 34 | * This test case tests the functionality of ptrace() for |
| 35 | * PTRACE_TRACEME & PTRACE_KILL requests. |
| 36 | * Here, we fork a child & the child does ptrace(PTRACE_TRACEME, ...). |
| 37 | * Then a signal is delivered to the child & verified that parent |
| 38 | * is notified via wait(). then parent does ptrace(PTRACE_KILL, ..) |
| 39 | * to kill the child. Again parent wait() for child to finish. |
| 40 | * If child finished abnormally, test passes. |
| 41 | * We test two cases |
| 42 | * 1) By telling child to ignore SIGUSR2 signal |
| 43 | * 2) By installing a signal handler for child for SIGUSR2 |
| 44 | * In both cases, child should stop & notify parent on reception |
| 45 | * of SIGUSR2 |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 46 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 47 | * Setup: |
| 48 | * Setup signal handling. |
| 49 | * Pause for SIGUSR1 if option specified. |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 50 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 51 | * Test: |
| 52 | * Loop if the proper options are given. |
| 53 | * setup signal handler for SIGUSR2 signal |
| 54 | * fork a child |
| 55 | * |
| 56 | * CHILD: |
| 57 | * setup signal handler for SIGUSR2 signal |
| 58 | * call ptrace() with PTRACE_TRACEME request |
| 59 | * send SIGUSR2 signal to self |
| 60 | * PARENT: |
| 61 | * wait() for child. |
| 62 | * if parent is notified when child gets a signal through wait(), |
| 63 | * then |
| 64 | * do ptrace(PTRACE_KILL, ..) on child |
| 65 | * wait() for child to finish, |
| 66 | * if child exited abnormaly, |
| 67 | * TEST passed |
| 68 | * else |
| 69 | * TEST failed |
| 70 | * else |
| 71 | * TEST failed |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 72 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 73 | * Cleanup: |
| 74 | * Print errno log and/or timing stats if options given |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 75 | * |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 76 | * USAGE: <for command-line> |
| 77 | * ptrace01 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p] |
| 78 | * where, -c n : Run n copies concurrently. |
| 79 | * -e : Turn on errno logging. |
| 80 | * -h : Show help screen |
| 81 | * -f : Turn off functional testing |
| 82 | * -i n : Execute test n times. |
| 83 | * -I x : Execute test for x seconds. |
| 84 | * -p : Pause for SIGUSR1 before starting |
| 85 | * -P x : Pause for x seconds between iterations. |
| 86 | * -t : Turn on syscall timing. |
| 87 | * |
| 88 | ****************************************************************/ |
| 89 | |
| 90 | #include <errno.h> |
| 91 | #include <signal.h> |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 92 | #include <sys/wait.h> |
| 93 | |
vapier | 919dca8 | 2009-11-03 19:42:12 +0000 | [diff] [blame] | 94 | #include <config.h> |
| 95 | #include "ptrace.h" |
| 96 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 97 | #include "test.h" |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 98 | |
| 99 | static void do_child(void); |
| 100 | static void setup(void); |
| 101 | static void cleanup(void); |
| 102 | static void child_handler(); |
| 103 | static void parent_handler(); |
| 104 | |
| 105 | static int got_signal = 0; |
| 106 | |
Cyril Hrubis | fdce7d5 | 2013-04-04 18:35:48 +0200 | [diff] [blame] | 107 | char *TCID = "ptrace01"; |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 108 | static int i; /* loop test case counter, shared with do_child */ |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 109 | |
| 110 | int TST_TOTAL = 2; |
| 111 | |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 112 | int main(int ac, char **av) |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 113 | { |
| 114 | |
Cyril Hrubis | 89af32a | 2012-10-24 16:39:11 +0200 | [diff] [blame] | 115 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 116 | const char *msg; |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 117 | pid_t child_pid; |
| 118 | int status; |
| 119 | struct sigaction parent_act; |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 120 | |
Garrett Cooper | 7d0a4a5 | 2010-12-16 10:05:08 -0800 | [diff] [blame] | 121 | if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
Garrett Cooper | 60fa801 | 2010-11-22 13:50:58 -0800 | [diff] [blame] | 122 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 123 | #ifdef UCLINUX |
| 124 | maybe_run_child(&do_child, "d", &i); |
| 125 | #endif |
| 126 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 127 | setup(); |
| 128 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 129 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 130 | |
Caspar Zhang | d59a659 | 2013-03-07 14:59:12 +0800 | [diff] [blame] | 131 | tst_count = 0; |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 132 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 133 | for (i = 0; i < TST_TOTAL; ++i) { |
| 134 | got_signal = 0; |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 135 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 136 | /* Setup signal handler for parent */ |
| 137 | if (i == 1) { |
| 138 | parent_act.sa_handler = parent_handler; |
| 139 | parent_act.sa_flags = SA_RESTART; |
Jan Stancek | c5532e4 | 2013-05-14 11:59:33 +0200 | [diff] [blame] | 140 | sigemptyset(&parent_act.sa_mask); |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 141 | |
| 142 | if ((sigaction(SIGUSR2, &parent_act, NULL)) |
| 143 | == -1) { |
| 144 | tst_resm(TWARN, "sigaction() failed" |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 145 | " in parent"); |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 146 | continue; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | switch (child_pid = FORK_OR_VFORK()) { |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 151 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 152 | case -1: |
| 153 | /* fork() failed */ |
| 154 | tst_resm(TFAIL, "fork() failed"); |
| 155 | continue; |
| 156 | |
| 157 | case 0: |
| 158 | /* Child */ |
| 159 | #ifdef UCLINUX |
| 160 | if (self_exec(av[0], "d", i) < 0) { |
| 161 | tst_resm(TFAIL, "self_exec failed"); |
| 162 | continue; |
| 163 | } |
| 164 | #else |
| 165 | do_child(); |
| 166 | #endif |
| 167 | |
| 168 | default: |
| 169 | /* Parent */ |
| 170 | if ((waitpid(child_pid, &status, 0)) < 0) { |
| 171 | tst_resm(TFAIL, "waitpid() failed"); |
| 172 | continue; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Check the exit status of child. If (it exits |
| 177 | * normally with exit value 1) OR (child came |
| 178 | * through signal handler), Test Failed |
| 179 | */ |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 180 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 181 | if (((WIFEXITED(status)) && |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 182 | (WEXITSTATUS(status))) || |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 183 | (got_signal == 1)) { |
| 184 | tst_resm(TFAIL, "Test Failed"); |
| 185 | continue; |
| 186 | } else { |
| 187 | /* Kill child */ |
| 188 | if ((ptrace(PTRACE_KILL, child_pid, |
| 189 | 0, 0)) == -1) { |
| 190 | tst_resm(TFAIL, "Test Failed:" |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 191 | " Parent was not able to kill" |
| 192 | " child"); |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 193 | continue; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | if ((waitpid(child_pid, &status, 0)) < 0) { |
| 198 | tst_resm(TFAIL, "waitpid() failed"); |
| 199 | continue; |
| 200 | } |
| 201 | |
| 202 | if (WIFEXITED(status)) { |
| 203 | /* Child exits normally */ |
| 204 | tst_resm(TFAIL, "Test failed"); |
| 205 | } else { |
| 206 | tst_resm(TPASS, "Test Passed"); |
| 207 | } |
| 208 | |
| 209 | } |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 210 | } |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 211 | } |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 212 | |
| 213 | /* cleanup and exit */ |
| 214 | cleanup(); |
Garrett Cooper | 1e6f5a6 | 2010-12-19 09:58:10 -0800 | [diff] [blame] | 215 | tst_exit(); |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 216 | |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 217 | } |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 218 | |
| 219 | /* do_child() */ |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 220 | void do_child(void) |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 221 | { |
| 222 | struct sigaction child_act; |
| 223 | |
| 224 | /* Setup signal handler for child */ |
| 225 | if (i == 0) { |
| 226 | child_act.sa_handler = SIG_IGN; |
| 227 | } else { |
| 228 | child_act.sa_handler = child_handler; |
| 229 | } |
| 230 | child_act.sa_flags = SA_RESTART; |
Jan Stancek | c5532e4 | 2013-05-14 11:59:33 +0200 | [diff] [blame] | 231 | sigemptyset(&child_act.sa_mask); |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 232 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 233 | if ((sigaction(SIGUSR2, &child_act, NULL)) == -1) { |
| 234 | tst_resm(TWARN, "sigaction() failed in child"); |
| 235 | exit(1); |
| 236 | } |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 237 | |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 238 | if ((ptrace(PTRACE_TRACEME, 0, 0, 0)) == -1) { |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 239 | tst_resm(TWARN, "ptrace() failed in child"); |
| 240 | exit(1); |
| 241 | } |
| 242 | /* ensure that child bypasses signal handler */ |
| 243 | if ((kill(getpid(), SIGUSR2)) == -1) { |
| 244 | tst_resm(TWARN, "kill() failed in child"); |
| 245 | exit(1); |
| 246 | } |
| 247 | exit(1); |
| 248 | } |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 249 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 250 | /* setup() - performs all ONE TIME setup for this test */ |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 251 | void setup(void) |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 252 | { |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 253 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 254 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 255 | |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 256 | TEST_PAUSE; |
| 257 | |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 258 | } |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 259 | |
| 260 | /* |
| 261 | *cleanup() - performs all ONE TIME cleanup for this test at |
| 262 | * completion or premature exit. |
| 263 | */ |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 264 | void cleanup(void) |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 265 | { |
| 266 | |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 267 | } |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 268 | |
| 269 | /* |
| 270 | * child_handler() - Signal handler for child |
| 271 | */ |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 272 | void child_handler(void) |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 273 | { |
| 274 | |
| 275 | if ((kill(getppid(), SIGUSR2)) == -1) { |
| 276 | tst_resm(TWARN, "kill() failed in child_handler()"); |
| 277 | exit(1); |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | * parent_handler() - Signal handler for parent |
| 283 | */ |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 284 | void parent_handler(void) |
vapier | d13d74b | 2006-02-11 07:24:00 +0000 | [diff] [blame] | 285 | { |
| 286 | |
| 287 | got_signal = 1; |
Chris Dearman | ec6edca | 2012-10-17 19:54:01 -0700 | [diff] [blame] | 288 | } |