From patchwork Wed Nov 20 19:42:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 36071 Received: (qmail 123578 invoked by alias); 20 Nov 2019 19:42:16 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 123569 invoked by uid 89); 20 Nov 2019 19:42:15 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-21.7 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_PASS autolearn=ham version=3.3.1 spammy= X-HELO: mail-qv1-f67.google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=to:cc:references:from:openpgp:autocrypt:subject:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=jhfuGlRRmySUaMzA2ME2isHMeK4Xzt/HIAReMXJc+Dc=; b=jE5G38bUlmmOa5ypbfpysenZkRqvUg3jWG+Ohho4Y1ioVQNzyBifcheMa7vdmFgHXy uJksT30/lO7d+8Zm1+N7GrFOxM4CNxtGxk1xAd642voLPcH7VENAL6XpH81Tq1yt7gfU FBVEIwsD2BNHm/1zwMRQ1sV4rI9n0nzlKmFchBS3a/Ob4fXv8HaNFhcN9Yf8VKd8Bvqf aO1dG3MuOIhAsgc3+x6rTCmmn2+JssxyzNwwPxBZ4ecPD5/BhAklxgAV+UmGJc/GJMo5 H2RQ7eKVUEo5s5LUfxrv3+h+PkHyMTNcixD5UPq9NAIdijHYU0BsSQwWROwNGt8vZ4Rc ys1A== Return-Path: To: Joseph Myers Cc: GNU C Library References: <20191120141535.5303-1-adhemerval.zanella@linaro.org> <20191120141535.5303-2-adhemerval.zanella@linaro.org> From: Adhemerval Zanella Openpgp: preference=signencrypt Subject: Re: [PATCH 2/3] posix: Refactor tst-waitid Message-ID: <035db587-0732-d7eb-8e66-24a8fb1d1cf1@linaro.org> Date: Wed, 20 Nov 2019 16:42:05 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: On 20/11/2019 14:33, Joseph Myers wrote: > This reminds me of the bug we have, > , for intermittent > failures of tst-waitid (I think the discussion it references starts at > ). > > Was that fixed by commit a58ad3f801960fa0dc0bb1106eb0d99f7ebd77b1 in 2013, > or is it fixed by your patch, or is it an unrelated issue? > My initial idea of replacing the sleep added by a58ad3f801960f is to loop atomically over a variable which is set by the signal handler. However I think a better strategy would be to use sigwaitinfo instead as Roland has suggested later in the thread. It allows clean up the test a little more. And BZ#14666 does seems to be same issue mitigated by a58ad3f801960f. My idea of using support_process_state_wait in this case is to avoid use timeouts to sync process/threads and move towards some ideas laid out on a recent thread on how to speed up the testsuite spent time [1] Below I updated the patch to use sigwaitinfo instead of global variables set by the signal handler. [1] https://sourceware.org/ml/libc-alpha/2019-07/msg00403.html --- [PATCH v2 2/3] posix: Refactor tst-waitid (BZ #14666) The main changes are: - Adapt to libsupport. - Synchronize the signal handler using atomics. - Replace waitpid by waitid calls. - Use support_process_state_wait to wait for child state. - Add tests for P_PGID and P_ALL. - Use sigwaitinfo instead of global state set by the signal handler. Checked on x86_64-linux-gnu and i686-linux-gnu. It fixes BZ #14666. --- -- diff --git a/posix/tst-waitid.c b/posix/tst-waitid.c index c82ec2b566..808bf6a8eb 100644 --- a/posix/tst-waitid.c +++ b/posix/tst-waitid.c @@ -22,13 +22,20 @@ #include #include #include +#include +#include +#include + +#include +#include +#include +#include static void -test_child (void) +test_child (bool setgroup) { - /* Wait a second to be sure the parent set his variables before we - produce a SIGCHLD. */ - sleep (1); + if (setgroup) + TEST_COMPARE (setpgid (0, 0), 0); /* First thing, we stop ourselves. */ raise (SIGSTOP); @@ -44,475 +51,239 @@ test_child (void) # define WSTOPPED WUNTRACED #endif -static sig_atomic_t expecting_sigchld, spurious_sigchld; -#ifdef SA_SIGINFO -static siginfo_t sigchld_info; +/* Set with only SIGCHLD on do_test_waitid. */ +static sigset_t chldset; +#ifdef SA_SIGINFO static void sigchld (int signo, siginfo_t *info, void *ctx) { - if (signo != SIGCHLD) - { - printf ("SIGCHLD handler got signal %d instead!\n", signo); - _exit (EXIT_FAILURE); - } - - if (! expecting_sigchld) - { - spurious_sigchld = 1; - printf ("spurious SIGCHLD: signo %d code %d status %d pid %d\n", - info->si_signo, info->si_code, info->si_status, info->si_pid); - } - else - { - sigchld_info = *info; - expecting_sigchld = 0; - } } +#endif static void -check_sigchld (const char *phase, int *ok, int code, int status, pid_t pid) +check_sigchld (int code, int status, pid_t pid) { - if (expecting_sigchld) - { - printf ("missing SIGCHLD on %s\n", phase); - *ok = EXIT_FAILURE; - expecting_sigchld = 0; - return; - } +#ifdef SA_SIGINFO + siginfo_t siginfo; + TEST_COMPARE (sigwaitinfo (&chldset, &siginfo), SIGCHLD); - if (sigchld_info.si_signo != SIGCHLD) - { - printf ("SIGCHLD for %s signal %d\n", phase, sigchld_info.si_signo); - *ok = EXIT_FAILURE; - } - if (sigchld_info.si_code != code) - { - printf ("SIGCHLD for %s code %d\n", phase, sigchld_info.si_code); - *ok = EXIT_FAILURE; - } - if (sigchld_info.si_status != status) - { - printf ("SIGCHLD for %s status %d\n", phase, sigchld_info.si_status); - *ok = EXIT_FAILURE; - } - if (sigchld_info.si_pid != pid) - { - printf ("SIGCHLD for %s pid %d\n", phase, sigchld_info.si_pid); - *ok = EXIT_FAILURE; - } -} -# define CHECK_SIGCHLD(phase, code_check, status_check) \ - check_sigchld ((phase), &status, (code_check), (status_check), pid) -#else -# define CHECK_SIGCHLD(phase, code, status) ((void) 0) + TEST_COMPARE (siginfo.si_signo, SIGCHLD); + TEST_COMPARE (siginfo.si_code, code); + TEST_COMPARE (siginfo.si_status, status); + TEST_COMPARE (siginfo.si_pid, pid); #endif +} static int -do_test (int argc, char *argv[]) +do_test_waitd_common (idtype_t type, pid_t pid) { -#ifdef SA_SIGINFO - struct sigaction sa; - sa.sa_flags = SA_SIGINFO|SA_RESTART; - sa.sa_sigaction = &sigchld; - if (sigemptyset (&sa.sa_mask) < 0 || sigaction (SIGCHLD, &sa, NULL) < 0) - { - printf ("setting SIGCHLD handler: %m\n"); - return EXIT_FAILURE; - } -#endif + /* Adding process_state_tracing_stop ('t') allows the test to work under + trace programs such as ptrace. */ + enum process_state_t stop_state = process_state_stopped + | process_state_tracing_stop; - expecting_sigchld = 1; + support_process_state_wait (pid, stop_state); - pid_t pid = fork (); - if (pid < 0) - { - printf ("fork: %m\n"); - return EXIT_FAILURE; - } - else if (pid == 0) - { - test_child (); - _exit (127); - } - - int status = EXIT_SUCCESS; -#define RETURN(ok) \ - do { if (status == EXIT_SUCCESS) status = (ok); goto out; } while (0) - - /* Give the child a chance to stop. */ - sleep (3); - - CHECK_SIGCHLD ("stopped (before waitid)", CLD_STOPPED, SIGSTOP); + check_sigchld (CLD_STOPPED, SIGSTOP, pid); /* Now try a wait that should not succeed. */ siginfo_t info; + int fail; + info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ - int fail = waitid (P_PID, pid, &info, WEXITED|WCONTINUED|WNOHANG); - switch (fail) - { - default: - printf ("waitid returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WNOHANG on stopped: %m\n"); - RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); - case 0: - if (info.si_signo == 0) - break; - if (info.si_signo == SIGCHLD) - printf ("waitid WNOHANG on stopped status %d\n", info.si_status); - else - printf ("waitid WNOHANG on stopped signal %d\n", info.si_signo); - RETURN (EXIT_FAILURE); - } + fail = waitid (P_PID, pid, &info, WEXITED|WCONTINUED|WNOHANG); + if (fail == -1 && errno == ENOTSUP) + FAIL_RET ("waitid WNOHANG on stopped: %m"); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, 0); /* Next the wait that should succeed right away. */ info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; fail = waitid (P_PID, pid, &info, WSTOPPED|WNOHANG); - switch (fail) - { - default: - printf ("waitid WSTOPPED|WNOHANG returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WSTOPPED|WNOHANG on stopped: %m\n"); - RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); - case 0: - if (info.si_signo != SIGCHLD) - { - printf ("waitid WSTOPPED|WNOHANG on stopped signal %d\n", - info.si_signo); - RETURN (EXIT_FAILURE); - } - if (info.si_code != CLD_STOPPED) - { - printf ("waitid WSTOPPED|WNOHANG on stopped code %d\n", - info.si_code); - RETURN (EXIT_FAILURE); - } - if (info.si_status != SIGSTOP) - { - printf ("waitid WSTOPPED|WNOHANG on stopped status %d\n", - info.si_status); - RETURN (EXIT_FAILURE); - } - if (info.si_pid != pid) - { - printf ("waitid WSTOPPED|WNOHANG on stopped pid %d != %d\n", - info.si_pid, pid); - RETURN (EXIT_FAILURE); - } - } + if (fail == -1 && errno == ENOTSUP) + FAIL_RET ("waitid WNOHANG on stopped: %m"); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_STOPPED); + TEST_COMPARE (info.si_status, SIGSTOP); + TEST_COMPARE (info.si_pid, pid); - expecting_sigchld = WCONTINUED != 0; + //expecting_sigchld = WCONTINUED != 0; if (kill (pid, SIGCONT) != 0) - { - printf ("kill (%d, SIGCONT): %m\n", pid); - RETURN (EXIT_FAILURE); - } + FAIL_RET ("kill (%d, SIGCONT): %m\n", pid); /* Wait for the child to have continued. */ - sleep (2); + support_process_state_wait (pid, process_state_sleeping); #if WCONTINUED != 0 - if (expecting_sigchld) - { - printf ("no SIGCHLD seen for SIGCONT (optional)\n"); - expecting_sigchld = 0; - } - else - CHECK_SIGCHLD ("continued (before waitid)", CLD_CONTINUED, SIGCONT); + { + sigset_t set; + sigemptyset (&set); + sigaddset (&set, SIGCHLD); + siginfo_t info; + TEST_COMPARE (sigwaitinfo (&set, &info), SIGCHLD); + + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_CONTINUED); + TEST_COMPARE (info.si_status, SIGCONT); + TEST_COMPARE (info.si_pid, pid); + } info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; fail = waitid (P_PID, pid, &info, WCONTINUED|WNOWAIT); - switch (fail) - { - default: - printf ("waitid WCONTINUED|WNOWAIT returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WCONTINUED|WNOWAIT on continued: %m\n"); - RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); - case 0: - if (info.si_signo != SIGCHLD) - { - printf ("waitid WCONTINUED|WNOWAIT on continued signal %d\n", - info.si_signo); - RETURN (EXIT_FAILURE); - } - if (info.si_code != CLD_CONTINUED) - { - printf ("waitid WCONTINUED|WNOWAIT on continued code %d\n", - info.si_code); - RETURN (EXIT_FAILURE); - } - if (info.si_status != SIGCONT) - { - printf ("waitid WCONTINUED|WNOWAIT on continued status %d\n", - info.si_status); - RETURN (EXIT_FAILURE); - } - if (info.si_pid != pid) - { - printf ("waitid WCONTINUED|WNOWAIT on continued pid %d != %d\n", - info.si_pid, pid); - RETURN (EXIT_FAILURE); - } - } + if (fail == -1 && errno == ENOTSUP) + FAIL_RET ("waitid WCONTINUED|WNOWAIT on continued: %m"); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_CONTINUED); + TEST_COMPARE (info.si_status, SIGCONT); + TEST_COMPARE (info.si_pid, pid); /* That should leave the CLD_CONTINUED state waiting to be seen again. */ info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; fail = waitid (P_PID, pid, &info, WCONTINUED); - switch (fail) - { - default: - printf ("waitid WCONTINUED returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WCONTINUED on continued: %m\n"); - RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); - case 0: - if (info.si_signo != SIGCHLD) - { - printf ("waitid WCONTINUED on continued signal %d\n", info.si_signo); - RETURN (EXIT_FAILURE); - } - if (info.si_code != CLD_CONTINUED) - { - printf ("waitid WCONTINUED on continued code %d\n", info.si_code); - RETURN (EXIT_FAILURE); - } - if (info.si_status != SIGCONT) - { - printf ("waitid WCONTINUED on continued status %d\n", - info.si_status); - RETURN (EXIT_FAILURE); - } - if (info.si_pid != pid) - { - printf ("waitid WCONTINUED on continued pid %d != %d\n", - info.si_pid, pid); - RETURN (EXIT_FAILURE); - } - } + if (fail == -1 && errno == ENOTSUP) + FAIL_RET ("waitid WCONTINUED on continued: %m"); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_CONTINUED); + TEST_COMPARE (info.si_status, SIGCONT); + TEST_COMPARE (info.si_pid, pid); /* Now try a wait that should not succeed. */ info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ fail = waitid (P_PID, pid, &info, WCONTINUED|WNOHANG); - switch (fail) - { - default: - printf ("waitid returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WCONTINUED|WNOHANG on waited continued: %m\n"); - RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); - case 0: - if (info.si_signo == 0) - break; - if (info.si_signo == SIGCHLD) - printf ("waitid WCONTINUED|WNOHANG on waited continued status %d\n", - info.si_status); - else - printf ("waitid WCONTINUED|WNOHANG on waited continued signal %d\n", - info.si_signo); - RETURN (EXIT_FAILURE); - } + if (fail == -1 && errno == ENOTSUP) + FAIL_RET ("waitid WCONTINUED|WNOHANG on waited continued: %m"); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, 0); /* Now stop him again and test waitpid with WCONTINUED. */ - expecting_sigchld = 1; + //expecting_sigchld = 1; if (kill (pid, SIGSTOP) != 0) - { - printf ("kill (%d, SIGSTOP): %m\n", pid); - RETURN (EXIT_FAILURE); - } + FAIL_RET ("kill (%d, SIGSTOP): %m\n", pid); - /* Give the child a chance to stop. The waitpid call below will block - until it has stopped, but if we are real quick and enter the waitpid - system call before the SIGCHLD has been generated, then it will be - discarded and never delivered. */ - sleep (3); + /* Wait the child stop. The waitid call below will block until it has + stopped, but if we are real quick and enter the waitid system call + before the SIGCHLD has been generated, then it will be discarded and + never delivered. */ + support_process_state_wait (pid, stop_state); - pid_t wpid = waitpid (pid, &fail, WUNTRACED); - if (wpid < 0) - { - printf ("waitpid WUNTRACED on stopped: %m\n"); - RETURN (EXIT_FAILURE); - } - else if (wpid != pid) - { - printf ("waitpid WUNTRACED on stopped returned %d != %d (status %x)\n", - wpid, pid, fail); - RETURN (EXIT_FAILURE); - } - else if (!WIFSTOPPED (fail) || WIFSIGNALED (fail) || WIFEXITED (fail) - || WIFCONTINUED (fail) || WSTOPSIG (fail) != SIGSTOP) - { - printf ("waitpid WUNTRACED on stopped: status %x\n", fail); - RETURN (EXIT_FAILURE); - } - CHECK_SIGCHLD ("stopped (after waitpid)", CLD_STOPPED, SIGSTOP); + fail = waitid (type, pid, &info, WEXITED|WSTOPPED); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_STOPPED); + TEST_COMPARE (info.si_status, SIGSTOP); + TEST_COMPARE (info.si_pid, pid); + + check_sigchld (CLD_STOPPED, SIGSTOP, pid); - expecting_sigchld = 1; if (kill (pid, SIGCONT) != 0) - { - printf ("kill (%d, SIGCONT): %m\n", pid); - RETURN (EXIT_FAILURE); - } + FAIL_RET ("kill (%d, SIGCONT): %m\n", pid); /* Wait for the child to have continued. */ - sleep (2); + support_process_state_wait (pid, process_state_sleeping); - if (expecting_sigchld) - { - printf ("no SIGCHLD seen for SIGCONT (optional)\n"); - expecting_sigchld = 0; - } - else - CHECK_SIGCHLD ("continued (before waitpid)", CLD_CONTINUED, SIGCONT); + check_sigchld (CLD_CONTINUED, SIGCONT, pid); - wpid = waitpid (pid, &fail, WCONTINUED); - if (wpid < 0) - { - if (errno == EINVAL) - printf ("waitpid does not support WCONTINUED\n"); - else - { - printf ("waitpid WCONTINUED on continued: %m\n"); - RETURN (EXIT_FAILURE); - } - } - else if (wpid != pid) - { - printf ("\ -waitpid WCONTINUED on continued returned %d != %d (status %x)\n", - wpid, pid, fail); - RETURN (EXIT_FAILURE); - } - else if (WIFSTOPPED (fail) || WIFSIGNALED (fail) || WIFEXITED (fail) - || !WIFCONTINUED (fail)) - { - printf ("waitpid WCONTINUED on continued: status %x\n", fail); - RETURN (EXIT_FAILURE); - } + fail = waitid (type, pid, &info, WCONTINUED); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_CONTINUED); + TEST_COMPARE (info.si_status, SIGCONT); + TEST_COMPARE (info.si_pid, pid); #endif - expecting_sigchld = 1; - /* Die, child, die! */ if (kill (pid, SIGKILL) != 0) - { - printf ("kill (%d, SIGKILL): %m\n", pid); - RETURN (EXIT_FAILURE); - } + FAIL_RET ("kill (%d, SIGKILL): %m\n", pid); #ifdef WNOWAIT info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; - fail = waitid (P_PID, pid, &info, WEXITED|WNOWAIT); - switch (fail) - { - default: - printf ("waitid WNOWAIT returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WNOWAIT on killed: %m\n"); - RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); - case 0: - if (info.si_signo != SIGCHLD) - { - printf ("waitid WNOWAIT on killed signal %d\n", info.si_signo); - RETURN (EXIT_FAILURE); - } - if (info.si_code != CLD_KILLED) - { - printf ("waitid WNOWAIT on killed code %d\n", info.si_code); - RETURN (EXIT_FAILURE); - } - if (info.si_status != SIGKILL) - { - printf ("waitid WNOWAIT on killed status %d\n", info.si_status); - RETURN (EXIT_FAILURE); - } - if (info.si_pid != pid) - { - printf ("waitid WNOWAIT on killed pid %d != %d\n", info.si_pid, pid); - RETURN (EXIT_FAILURE); - } - } + fail = waitid (type, pid, &info, WEXITED|WNOWAIT); + if (fail == -1 && errno == ENOTSUP) + FAIL_RET ("waitid WNOHANG on killed: %m"); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_KILLED); + TEST_COMPARE (info.si_status, SIGKILL); + TEST_COMPARE (info.si_pid, pid); #else - /* Allow enough time to be sure the child died; we didn't synchronize. */ - sleep (2); + support_process_state_wait (pid, process_state_zombie); #endif - - CHECK_SIGCHLD ("killed", CLD_KILLED, SIGKILL); + check_sigchld (CLD_KILLED, SIGKILL, pid); info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; - fail = waitid (P_PID, pid, &info, WEXITED|WNOHANG); - switch (fail) - { - default: - printf ("waitid WNOHANG returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); - case -1: - printf ("waitid WNOHANG on killed: %m\n"); - RETURN (EXIT_FAILURE); - case 0: - if (info.si_signo != SIGCHLD) - { - printf ("waitid WNOHANG on killed signal %d\n", info.si_signo); - RETURN (EXIT_FAILURE); - } - if (info.si_code != CLD_KILLED) - { - printf ("waitid WNOHANG on killed code %d\n", info.si_code); - RETURN (EXIT_FAILURE); - } - if (info.si_status != SIGKILL) - { - printf ("waitid WNOHANG on killed status %d\n", info.si_status); - RETURN (EXIT_FAILURE); - } - if (info.si_pid != pid) - { - printf ("waitid WNOHANG on killed pid %d != %d\n", info.si_pid, pid); - RETURN (EXIT_FAILURE); - } - } + fail = waitid (type, pid, &info, WEXITED | WNOHANG); + TEST_COMPARE (fail, 0); + TEST_COMPARE (info.si_signo, SIGCHLD); + TEST_COMPARE (info.si_code, CLD_KILLED); + TEST_COMPARE (info.si_status, SIGKILL); + TEST_COMPARE (info.si_pid, pid); fail = waitid (P_PID, pid, &info, WEXITED); - if (fail == -1) - { - if (errno != ECHILD) - { - printf ("waitid WEXITED on killed: %m\n"); - RETURN (EXIT_FAILURE); - } - } - else + TEST_COMPARE (fail, -1); + TEST_COMPARE (errno, ECHILD); + + return 0; +} + +static int +do_test_waitid (idtype_t type) +{ +#ifdef SA_SIGINFO + { + struct sigaction sa; + sa.sa_flags = SA_SIGINFO | SA_RESTART; + sa.sa_sigaction = sigchld; + sigemptyset (&sa.sa_mask); + xsigaction (SIGCHLD, &sa, NULL); + } +#endif + + sigemptyset (&chldset); + sigaddset (&chldset, SIGCHLD); + + /* The SIGCHLD shall has blocked at the time of the call to sigwait; + otherwise, the behavior is undefined. */ + sigprocmask (SIG_BLOCK, &chldset, NULL); + + pid_t pid = xfork (); + if (pid == 0) { - printf ("waitid WEXITED returned bogus value %d\n", fail); - RETURN (EXIT_FAILURE); + test_child (type == P_PGID || type == P_ALL); + _exit (127); } -#undef RETURN - out: - if (spurious_sigchld) - status = EXIT_FAILURE; - signal (SIGCHLD, SIG_IGN); + int ret = do_test_waitd_common (type, pid); + + xsignal (SIGCHLD, SIG_IGN); kill (pid, SIGKILL); /* Make sure it's dead if we bailed early. */ - return status; + return ret; +} + +static int +do_test (void) +{ + int ret = 0; + + ret |= do_test_waitid (P_PID); + ret |= do_test_waitid (P_PGID); + ret |= do_test_waitid (P_ALL); + + return ret; } -#include "../test-skeleton.c" +#include