diff options
author | Greg Hackmann <ghackmann@google.com> | 2019-03-19 12:19:39 +0530 |
---|---|---|
committer | Cyril Hrubis <chrubis@suse.cz> | 2019-03-19 14:38:31 +0100 |
commit | d6ac3526fdc85cea4faa690fa89a1776b5f1af2c (patch) | |
tree | d44a8a2dca520e4070960aa5c01526556a1a3db0 /testcases/kernel | |
parent | d2714ceab57603ba9869b207203005bc8e0d08a0 (diff) |
syscalls/tgkill01: add new test
tgkill() delivers a signal to a specific thread. Test this by
installing a SIGUSR1 handler which records the current pthread ID.
Start a number of threads in parallel, then one-by-one call tgkill(...,
tid, SIGUSR1) and check that the expected pthread ID was recorded.
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Li Wang <liwang@redhat.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
Diffstat (limited to 'testcases/kernel')
-rw-r--r-- | testcases/kernel/syscalls/tgkill/.gitignore | 1 | ||||
-rw-r--r-- | testcases/kernel/syscalls/tgkill/Makefile | 10 | ||||
-rw-r--r-- | testcases/kernel/syscalls/tgkill/tgkill.h | 22 | ||||
-rw-r--r-- | testcases/kernel/syscalls/tgkill/tgkill01.c | 134 |
4 files changed, 167 insertions, 0 deletions
diff --git a/testcases/kernel/syscalls/tgkill/.gitignore b/testcases/kernel/syscalls/tgkill/.gitignore new file mode 100644 index 000000000..f4566fde2 --- /dev/null +++ b/testcases/kernel/syscalls/tgkill/.gitignore @@ -0,0 +1 @@ +tgkill01 diff --git a/testcases/kernel/syscalls/tgkill/Makefile b/testcases/kernel/syscalls/tgkill/Makefile new file mode 100644 index 000000000..602a59ba1 --- /dev/null +++ b/testcases/kernel/syscalls/tgkill/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright (c) 2018 Google, Inc. + +top_srcdir ?= ../../../.. + +include $(top_srcdir)/include/mk/testcases.mk + +include $(top_srcdir)/include/mk/generic_leaf_target.mk + +CFLAGS += -pthread diff --git a/testcases/kernel/syscalls/tgkill/tgkill.h b/testcases/kernel/syscalls/tgkill/tgkill.h new file mode 100644 index 000000000..a7d96f452 --- /dev/null +++ b/testcases/kernel/syscalls/tgkill/tgkill.h @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2018 Google, Inc. + */ + +#ifndef TGKILL_H +#define TGKILL_H + +#include "config.h" +#include "lapi/syscalls.h" + +static inline int sys_tgkill(int tgid, int tid, int sig) +{ + return tst_syscall(__NR_tgkill, tgid, tid, sig); +} + +static inline pid_t sys_gettid(void) +{ + return tst_syscall(__NR_gettid); +} + +#endif /* TGKILL_H */ diff --git a/testcases/kernel/syscalls/tgkill/tgkill01.c b/testcases/kernel/syscalls/tgkill/tgkill01.c new file mode 100644 index 000000000..075bf4882 --- /dev/null +++ b/testcases/kernel/syscalls/tgkill/tgkill01.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2018 Google, Inc. + * + * tgkill() delivers a signal to a specific thread. Test this by installing + * a SIGUSR1 handler which records the current pthread ID. Start a number + * of threads in parallel, then one-by-one call tgkill(..., tid, SIGUSR1) + * and check that the expected pthread ID was recorded. + */ + +#include <pthread.h> +#include <stdlib.h> + +#include "tst_safe_pthread.h" +#include "tst_test.h" +#include "tgkill.h" + +struct thread_state { + pthread_t thread; + pid_t tid; +}; + +static char *str_threads; +static int n_threads = 10; +static struct thread_state *threads; + +static pthread_t sigusr1_thread; + +static void sigusr1_handler(int signum __attribute__((unused))) +{ + sigusr1_thread = pthread_self(); +} + +static void *thread_func(void *arg) +{ + struct thread_state *thread = arg; + + /** + * There is no standard way to map pthread -> tid, so we will have the + * child stash its own tid then notify the parent that the stashed tid + * is available. + */ + thread->tid = sys_gettid(); + + TST_CHECKPOINT_WAKE(0); + + TST_CHECKPOINT_WAIT(1); + + return arg; +} + +static void start_thread(struct thread_state *thread) +{ + SAFE_PTHREAD_CREATE(&thread->thread, NULL, thread_func, thread); + + TST_CHECKPOINT_WAIT(0); +} + +static void stop_threads(void) +{ + int i; + + TST_CHECKPOINT_WAKE2(1, n_threads); + + for (i = 0; i < n_threads; i++) { + if (threads[i].tid == -1) + continue; + + SAFE_PTHREAD_JOIN(threads[i].thread, NULL); + threads[i].tid = -1; + } + + if (threads) + free(threads); +} + +static void run(void) +{ + int i; + + for (i = 0; i < n_threads; i++) { + sigusr1_thread = pthread_self(); + + TEST(sys_tgkill(getpid(), threads[i].tid, SIGUSR1)); + if (TST_RET) { + tst_res(TFAIL | TTERRNO, "tgkill() failed"); + return; + } + + while (pthread_equal(sigusr1_thread, pthread_self())) + usleep(1000); + + if (!pthread_equal(sigusr1_thread, threads[i].thread)) { + tst_res(TFAIL, "SIGUSR1 delivered to wrong thread"); + return; + } + } + + tst_res(TPASS, "SIGUSR1 delivered to correct threads"); +} + +static void setup(void) +{ + int i; + + if (tst_parse_int(str_threads, &n_threads, 1, INT_MAX)) + tst_brk(TBROK, "Invalid number of threads '%s'", str_threads); + + threads = SAFE_MALLOC(sizeof(*threads) * n_threads); + + struct sigaction sigusr1 = { + .sa_handler = sigusr1_handler, + }; + SAFE_SIGACTION(SIGUSR1, &sigusr1, NULL); + + for (i = 0; i < n_threads; i++) + threads[i].tid = -1; + + for (i = 0; i < n_threads; i++) + start_thread(&threads[i]); +} + +static struct tst_option options[] = { + {"t:", &str_threads, "-t Number of threads (default 10)"}, + {NULL, NULL, NULL}, +}; + +static struct tst_test test = { + .options = options, + .needs_checkpoints = 1, + .setup = setup, + .test_all = run, + .cleanup = stop_threads, +}; |