From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40180) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gYtdT-0004A2-PM for qemu-devel@nongnu.org; Mon, 17 Dec 2018 09:12:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gYtdO-0004qY-Mk for qemu-devel@nongnu.org; Mon, 17 Dec 2018 09:12:43 -0500 Received: from mx1.redhat.com ([209.132.183.28]:43374) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gYtdO-0004mK-Cc for qemu-devel@nongnu.org; Mon, 17 Dec 2018 09:12:38 -0500 References: <20181217035816.21777-1-richard.henderson@linaro.org> From: Wainer dos Santos Moschetta Message-ID: <24582c74-a00d-4949-0e91-8dec793d02bc@redhat.com> Date: Mon, 17 Dec 2018 12:12:30 -0200 MIME-Version: 1.0 In-Reply-To: <20181217035816.21777-1-richard.henderson@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Subject: Re: [Qemu-devel] [PATCH] tests: Exit boot-serial-test loop if child dies List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Richard Henderson , qemu-devel@nongnu.org Cc: Laurent Vivier , Paolo Bonzini , Thomas Huth On 12/17/2018 01:58 AM, Richard Henderson wrote: > There's no point in waiting 5 full minutes when there will be > no more output. Compute timeout based on elapsed wall clock > time instead of N * delays, as the delay is a minimum sleep time. > > Cc: Thomas Huth > Cc: Laurent Vivier > Cc: Paolo Bonzini > Signed-off-by: Richard Henderson > --- > tests/libqtest.h | 8 +++++ > tests/boot-serial-test.c | 16 +++++++-- > tests/libqtest.c | 70 +++++++++++++++++++++++++--------------- > 3 files changed, 65 insertions(+), 29 deletions(-) Reviewed-by: Wainer dos Santos Moschetta > > diff --git a/tests/libqtest.h b/tests/libqtest.h > index 96a6c01352..9758c51be6 100644 > --- a/tests/libqtest.h > +++ b/tests/libqtest.h > @@ -1011,4 +1011,12 @@ bool qmp_rsp_is_err(QDict *rsp); > */ > void qmp_assert_error_class(QDict *rsp, const char *class); > > +/** > + * qtest_probe_child: > + * @s: QTestState instance to operate on. > + * > + * Returns: true if the child is still alive. > + */ > +bool qtest_probe_child(QTestState *s); > + > #endif > diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c > index 8ec6aed35d..54b9347325 100644 > --- a/tests/boot-serial-test.c > +++ b/tests/boot-serial-test.c > @@ -130,11 +130,12 @@ static testdef_t tests[] = { > > static bool check_guest_output(const testdef_t *test, int fd) > { > - int i, nbr = 0, pos = 0, ccnt; > + int nbr = 0, pos = 0, ccnt; > + time_t now, start = time(NULL); > char ch; > > - /* Poll serial output... Wait at most 360 seconds */ > - for (i = 0; i < 36000; ++i) { > + /* Poll serial output... */ > + while (1) { > ccnt = 0; > while (ccnt++ < 512 && (nbr = read(fd, &ch, 1)) == 1) { > if (ch == test->expect[pos]) { > @@ -148,6 +149,15 @@ static bool check_guest_output(const testdef_t *test, int fd) > } > } > g_assert(nbr >= 0); > + /* Wait only if the child is still alive. */ > + if (!qtest_probe_child(global_qtest)) { > + break; > + } > + /* Wait at most 360 seconds. */ > + now = time(NULL); > + if (now - start >= 360) { > + break; > + } > g_usleep(10000); > } > > diff --git a/tests/libqtest.c b/tests/libqtest.c > index 43be078518..1d75d3c936 100644 > --- a/tests/libqtest.c > +++ b/tests/libqtest.c > @@ -39,10 +39,11 @@ struct QTestState > { > int fd; > int qmp_fd; > + pid_t qemu_pid; /* our child QEMU process */ > + int wstatus; > + bool big_endian; > bool irq_level[MAX_IRQ]; > GString *rx; > - pid_t qemu_pid; /* our child QEMU process */ > - bool big_endian; > }; > > static GHookList abrt_hooks; > @@ -96,36 +97,52 @@ static int socket_accept(int sock) > return ret; > } > > +bool qtest_probe_child(QTestState *s) > +{ > + pid_t pid = s->qemu_pid; > + > + if (pid != -1) { > + pid = waitpid(pid, &s->wstatus, WNOHANG); > + if (pid == 0) { > + return true; > + } > + s->qemu_pid = -1; > + } > + return false; > +} > + > static void kill_qemu(QTestState *s) > { > - if (s->qemu_pid != -1) { > - int wstatus = 0; > - pid_t pid; > - > - kill(s->qemu_pid, SIGTERM); > - TFR(pid = waitpid(s->qemu_pid, &wstatus, 0)); > + pid_t pid = s->qemu_pid; > + int wstatus; > > + /* Skip wait if qtest_probe_child already reaped. */ > + if (pid != -1) { > + kill(pid, SIGTERM); > + TFR(pid = waitpid(s->qemu_pid, &s->wstatus, 0)); > assert(pid == s->qemu_pid); > - /* > - * We expect qemu to exit with status 0; anything else is > - * fishy and should be logged with as much detail as possible. > - */ > - if (wstatus) { > - if (WIFEXITED(wstatus)) { > - fprintf(stderr, "%s:%d: kill_qemu() tried to terminate QEMU " > - "process but encountered exit status %d\n", > - __FILE__, __LINE__, WEXITSTATUS(wstatus)); > - } else if (WIFSIGNALED(wstatus)) { > - int sig = WTERMSIG(wstatus); > - const char *signame = strsignal(sig) ?: "unknown ???"; > - const char *dump = WCOREDUMP(wstatus) ? " (core dumped)" : ""; > + } > > - fprintf(stderr, "%s:%d: kill_qemu() detected QEMU death " > - "from signal %d (%s)%s\n", > - __FILE__, __LINE__, sig, signame, dump); > - } > - abort(); > + /* > + * We expect qemu to exit with status 0; anything else is > + * fishy and should be logged with as much detail as possible. > + */ > + wstatus = s->wstatus; > + if (wstatus) { > + if (WIFEXITED(wstatus)) { > + fprintf(stderr, "%s:%d: kill_qemu() tried to terminate QEMU " > + "process but encountered exit status %d\n", > + __FILE__, __LINE__, WEXITSTATUS(wstatus)); > + } else if (WIFSIGNALED(wstatus)) { > + int sig = WTERMSIG(wstatus); > + const char *signame = strsignal(sig) ?: "unknown ???"; > + const char *dump = WCOREDUMP(wstatus) ? " (core dumped)" : ""; > + > + fprintf(stderr, "%s:%d: kill_qemu() detected QEMU death " > + "from signal %d (%s)%s\n", > + __FILE__, __LINE__, sig, signame, dump); > } > + abort(); > } > } > > @@ -228,6 +245,7 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args) > > g_test_message("starting QEMU: %s", command); > > + s->wstatus = 0; > s->qemu_pid = fork(); > if (s->qemu_pid == 0) { > setenv("QEMU_AUDIO_DRV", "none", true);