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ptrace05: Refactor the test using new LTP API
Link: https://lore.kernel.org/ltp/[email protected]/ Reviewed-by: Petr Vorel <[email protected]> Reviewed-by: Cyril Hrubis <[email protected]> Signed-off-by: Wei Gao <[email protected]>
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| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| /* | ||
| ****************************************************************************** | ||
| * | ||
| * ptrace05 - an app which ptraces itself as per arbitrarily specified signals, | ||
| * over a user specified range. | ||
| * | ||
| * Copyright (C) 2009, Ngie Cooper | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along | ||
| * with this program; if not, write to the Free Software Foundation, Inc., | ||
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| * Copyright (c) Linux Test Project, 2009-2019 | ||
| * Copyright (C) 2009, Ngie Cooper | ||
| * Copyright (c) 2023 Wei Gao <[email protected]> | ||
| */ | ||
|
|
||
| /*\ | ||
| * [Description] | ||
| * | ||
| ****************************************************************************** | ||
| * This test ptraces itself as per arbitrarily specified signals, | ||
| * over 0 to SIGRTMAX range. | ||
| */ | ||
|
|
||
| #include <sys/types.h> | ||
| #include <sys/wait.h> | ||
| #include <signal.h> | ||
| #include <errno.h> | ||
| #include <libgen.h> | ||
| #include <math.h> | ||
| #include <stdlib.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <unistd.h> | ||
| #include <sys/ptrace.h> | ||
|
|
||
| #include "test.h" | ||
| #include "lapi/signal.h" | ||
| #include "tst_test.h" | ||
|
|
||
| char *TCID = "ptrace05"; | ||
| int TST_TOTAL = 0; | ||
|
|
||
| int usage(const char *); | ||
| static int expect_stop; | ||
|
|
||
| int usage(const char *argv0) | ||
| static void test_signal(int signum) | ||
| { | ||
| fprintf(stderr, "usage: %s [start-signum] [end-signum]\n", argv0); | ||
| return 1; | ||
| } | ||
|
|
||
| int main(int argc, char **argv) | ||
| { | ||
|
|
||
| int end_signum = -1; | ||
| int signum; | ||
| int start_signum = -1; | ||
| int status; | ||
|
|
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| pid_t child; | ||
|
|
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| tst_parse_opts(argc, argv, NULL, NULL); | ||
| child = SAFE_FORK(); | ||
|
|
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| if (start_signum == -1) { | ||
| start_signum = 0; | ||
| if (!child) { | ||
| TST_EXP_PASS_SILENT(ptrace(PTRACE_TRACEME, 0, NULL, NULL)); | ||
| tst_res(TDEBUG, "[child] Sending kill(.., %s)", tst_strsig(signum)); | ||
| SAFE_KILL(getpid(), signum); | ||
| exit(0); | ||
| } | ||
| if (end_signum == -1) { | ||
| end_signum = SIGRTMAX; | ||
|
|
||
| SAFE_WAITPID(child, &status, 0); | ||
|
|
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| switch (signum) { | ||
| case 0: | ||
| if (WIFEXITED(status) | ||
| && WEXITSTATUS(status) == 0) { | ||
| tst_res(TPASS, | ||
| "kill(.., 0) exited with 0, as expected."); | ||
| } else { | ||
| tst_res(TFAIL, | ||
| "kill(.., 0) exited with unexpected %s.", tst_strstatus(status)); | ||
| } | ||
| break; | ||
| case SIGKILL: | ||
| if (WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL) | ||
| tst_res(TPASS, "Child killed by SIGKILL"); | ||
| else | ||
| tst_res(TFAIL, "Child %s", tst_strstatus(status)); | ||
| break; | ||
| /* All other processes should be stopped. */ | ||
| default: | ||
| if (WIFSTOPPED(status)) { | ||
| tst_res(TDEBUG, "Stopped as expected"); | ||
| } else { | ||
| tst_res(TFAIL, "Didn't stop as expected. Child %s", tst_strstatus(status)); | ||
| expect_stop++; | ||
| } | ||
| break; | ||
| } | ||
|
|
||
| for (signum = start_signum; signum <= end_signum; signum++) { | ||
| if (signum != 0 && signum != SIGKILL) | ||
| SAFE_PTRACE(PTRACE_CONT, child, NULL, NULL); | ||
| } | ||
|
|
||
| static void run(void) | ||
| { | ||
| int signum = 0; | ||
|
|
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| for (signum = 0; signum <= SIGRTMAX; signum++) { | ||
| if (signum >= __SIGRTMIN && signum < SIGRTMIN) | ||
| continue; | ||
|
|
||
| switch (child = fork()) { | ||
| case -1: | ||
| tst_brkm(TBROK | TERRNO, NULL, "fork() failed"); | ||
| case 0: | ||
|
|
||
| if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != -1) { | ||
| tst_resm(TINFO, "[child] Sending kill(.., %d)", | ||
| signum); | ||
| if (kill(getpid(), signum) < 0) { | ||
| tst_resm(TINFO | TERRNO, | ||
| "[child] kill(.., %d) failed.", | ||
| signum); | ||
| } | ||
| } else { | ||
|
|
||
| /* | ||
| * This won't increment the TST_COUNT var. | ||
| * properly, but it'll show up as a failure | ||
| * nonetheless. | ||
| */ | ||
| tst_resm(TFAIL | TERRNO, | ||
| "Failed to ptrace(PTRACE_TRACEME, ...) " | ||
| "properly"); | ||
|
|
||
| } | ||
| /* Shouldn't get here if signum == 0. */ | ||
| exit((signum == 0 ? 0 : 2)); | ||
| break; | ||
|
|
||
| default: | ||
|
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| waitpid(child, &status, 0); | ||
|
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| switch (signum) { | ||
| case 0: | ||
| if (WIFEXITED(status) | ||
| && WEXITSTATUS(status) == 0) { | ||
| tst_resm(TPASS, | ||
| "kill(.., 0) exited " | ||
| "with 0, as expected."); | ||
| } else { | ||
| tst_resm(TFAIL, | ||
| "kill(.., 0) didn't exit " | ||
| "with 0."); | ||
| } | ||
| break; | ||
| case SIGKILL: | ||
| if (WIFSIGNALED(status)) { | ||
| /* SIGKILL must be uncatchable. */ | ||
| if (WTERMSIG(status) == SIGKILL) { | ||
| tst_resm(TPASS, | ||
| "Killed with SIGKILL, " | ||
| "as expected."); | ||
| } else { | ||
| tst_resm(TPASS, | ||
| "Didn't die with " | ||
| "SIGKILL (?!) "); | ||
| } | ||
| } else if (WIFEXITED(status)) { | ||
| tst_resm(TFAIL, | ||
| "Exited unexpectedly instead " | ||
| "of dying with SIGKILL."); | ||
| } else if (WIFSTOPPED(status)) { | ||
| tst_resm(TFAIL, | ||
| "Stopped instead of dying " | ||
| "with SIGKILL."); | ||
| } | ||
| break; | ||
| /* All other processes should be stopped. */ | ||
| default: | ||
| if (WIFSTOPPED(status)) { | ||
| tst_resm(TPASS, "Stopped as expected"); | ||
| } else { | ||
| tst_resm(TFAIL, "Didn't stop as " | ||
| "expected."); | ||
| if (kill(child, 0)) { | ||
| tst_resm(TINFO, | ||
| "Is still alive!?"); | ||
| } else if (WIFEXITED(status)) { | ||
| tst_resm(TINFO, | ||
| "Exited normally"); | ||
| } else if (WIFSIGNALED(status)) { | ||
| tst_resm(TINFO, | ||
| "Was signaled with " | ||
| "signum=%d", | ||
| WTERMSIG(status)); | ||
| } | ||
|
|
||
| } | ||
|
|
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| break; | ||
|
|
||
| } | ||
|
|
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| } | ||
| /* Make sure the child dies a quick and painless death ... */ | ||
| kill(child, 9); | ||
|
|
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| test_signal(signum); | ||
| } | ||
|
|
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| tst_exit(); | ||
|
|
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| } | ||
|
|
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| static struct tst_test test = { | ||
| .test_all = run, | ||
| .forks_child = 1, | ||
| }; |