From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sumit Garg Date: Tue, 19 Mar 2019 12:19:40 +0530 Subject: [LTP] [PATCH v3 2/3] syscalls/tgkill02: add new test In-Reply-To: <1552978181-27748-1-git-send-email-sumit.garg@linaro.org> References: <1552978181-27748-1-git-send-email-sumit.garg@linaro.org> Message-ID: <1552978181-27748-3-git-send-email-sumit.garg@linaro.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it From: Greg Hackmann tgkill() should fail with EAGAIN when RLIMIT_SIGPENDING is reached with a real-time signal. Test this by starting a child thread with SIGRTMIN blocked and a limit of 0 pending signals, then attempting to deliver SIGRTMIN from the parent thread. Signed-off-by: Greg Hackmann Signed-off-by: Sumit Garg Reviewed-by: Li Wang --- runtest/syscalls | 1 + testcases/kernel/syscalls/tgkill/.gitignore | 1 + testcases/kernel/syscalls/tgkill/tgkill02.c | 68 +++++++++++++++++++++++++++++ 3 files changed, 70 insertions(+) create mode 100644 testcases/kernel/syscalls/tgkill/tgkill02.c diff --git a/runtest/syscalls b/runtest/syscalls index d6999f0..7af9136 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -1401,6 +1401,7 @@ syslog11 syslog11 syslog12 syslog12 tgkill01 tgkill01 +tgkill02 tgkill02 time01 time01 time02 time02 diff --git a/testcases/kernel/syscalls/tgkill/.gitignore b/testcases/kernel/syscalls/tgkill/.gitignore index f4566fd..42be2bb 100644 --- a/testcases/kernel/syscalls/tgkill/.gitignore +++ b/testcases/kernel/syscalls/tgkill/.gitignore @@ -1 +1,2 @@ tgkill01 +tgkill02 diff --git a/testcases/kernel/syscalls/tgkill/tgkill02.c b/testcases/kernel/syscalls/tgkill/tgkill02.c new file mode 100644 index 0000000..88f3842 --- /dev/null +++ b/testcases/kernel/syscalls/tgkill/tgkill02.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2018 Google, Inc. + * + * tgkill() should fail with EAGAIN when RLIMIT_SIGPENDING is reached with a + * real-time signal. Test this by starting a child thread with SIGRTMIN + * blocked and a limit of 0 pending signals, then attempting to deliver + * SIGRTMIN from the parent thread. + */ + +#include +#include + +#include "tst_safe_pthread.h" +#include "tst_test.h" +#include "tgkill.h" + +static void *thread_func(void *arg) +{ + const struct rlimit sigpending = { + .rlim_cur = 0, + .rlim_max = 0, + }; + sigset_t sigrtmin; + int err; + pid_t *tid = arg; + + sigemptyset(&sigrtmin); + sigaddset(&sigrtmin, SIGRTMIN); + + err = pthread_sigmask(SIG_BLOCK, &sigrtmin, NULL); + if (err) + tst_brk(TBROK, "pthread_sigmask() failed: %s", + tst_strerrno(err)); + + SAFE_SETRLIMIT(RLIMIT_SIGPENDING, &sigpending); + *tid = sys_gettid(); + + TST_CHECKPOINT_WAKE_AND_WAIT(0); + + return arg; +} + +static void run(void) +{ + pthread_t thread; + pid_t tid = -1; + + SAFE_PTHREAD_CREATE(&thread, NULL, thread_func, &tid); + + TST_CHECKPOINT_WAIT(0); + + TEST(sys_tgkill(getpid(), tid, SIGRTMIN)); + if (TST_RET && TST_ERR == EAGAIN) + tst_res(TPASS, "tgkill() failed with EAGAIN as expected"); + else + tst_res(TFAIL | TTERRNO, + "tgkill() should have failed with EAGAIN"); + + TST_CHECKPOINT_WAKE(0); + + SAFE_PTHREAD_JOIN(thread, NULL); +} + +static struct tst_test test = { + .needs_checkpoints = 1, + .test_all = run, +}; -- 2.7.4