1 files changed, 279 insertions, 0 deletions
diff --git a/kernel/t_semtimedop.c b/kernel/t_semtimedop.c
new file mode 100644
index 000000000000..daeaac6b3dab
--- /dev/null
+++ b/kernel/t_semtimedop.c
@@ -0,0 +1,279 @@
+/*	$NetBSD: t_semtimedop.c,v 1.2 2024/10/10 07:45:02 martin Exp $	*/
+
+/*-
+ * Copyright (c) 2024 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_semtimedop.c,v 1.2 2024/10/10 07:45:02 martin Exp $");
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <atf-c.h>
+#include <sys/wait.h>
+
+union semun {
+	int	val;		/* value for SETVAL */
+	struct	semid_ds *buf;	/* buffer for IPC_{STAT,SET} */
+	u_short	*array;		/* array for GETALL & SETALL */
+};
+
+ATF_TC(semtimedop_basic);
+ATF_TC_HEAD(semtimedop_basic, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "Basic semtimedop functionality");
+}
+
+ATF_TC_BODY(semtimedop_basic, tc)
+{
+	key_t		key = IPC_PRIVATE;
+	int		semid;
+	struct sembuf	sops;
+	union semun	sun;
+	struct timespec	timeout;
+
+	/* Create semaphore set with 1 semaphore */
+	semid = semget(key, 1, IPC_CREAT | 0600);
+	ATF_REQUIRE_MSG(semid != -1, "semget failed: %s", strerror(errno));
+
+	/* Initialize semaphore to 0 */
+	sun.val = 0;
+	if (semctl(semid, 0, SETVAL, sun) == -1) {
+		ATF_REQUIRE_MSG(0, "semctl SETVAL failed: %s",
+		    strerror(errno));
+	}
+
+	/* Define semtimedop operation: increment semaphore */
+	sops.sem_num = 0;
+	sops.sem_op = 1;
+	sops.sem_flg = 0;
+
+	/* Define timeout */
+	timeout.tv_sec = 1;
+	timeout.tv_nsec = 0;
+
+	/* Perform semtimedop */
+	if (semtimedop(semid, &sops, 1, &timeout) == -1) {
+		ATF_REQUIRE_MSG(0, "semtimedop failed: %s", strerror(errno));
+	}
+
+	/* Check semaphore value */
+	int val = semctl(semid, 0, GETVAL);
+	ATF_REQUIRE_MSG(val == 1,
+	    "Semaphore value incorrect: got %d, expected 1", val);
+
+	/* Clean up */
+	ATF_REQUIRE_MSG(semctl(semid, 0, IPC_RMID) != -1,
+	    "semctl IPC_RMID failed: %s", strerror(errno));
+}
+
+/* semtimedop blocks until timeout expires */
+ATF_TC(semtimedop_timeout);
+ATF_TC_HEAD(semtimedop_timeout, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "semtimedop blocks until timeout expires");
+}
+
+ATF_TC_BODY(semtimedop_timeout, tc)
+{
+	key_t		key = IPC_PRIVATE;
+	int		semid;
+	struct sembuf	sops;
+	union semun	sun;
+	struct timespec	timeout;
+	pid_t		pid;
+	int		status;
+
+	/* Create semaphore set with 1 semaphore */
+	semid = semget(key, 1, IPC_CREAT | 0600);
+	ATF_REQUIRE_MSG(semid != -1, "semget failed: %s", strerror(errno));
+
+	/* Initialize semaphore to 0 */
+	sun.val = 0;
+	if (semctl(semid, 0, SETVAL, sun) == -1) {
+		ATF_REQUIRE_MSG(0, "semctl SETVAL failed: %s", strerror(errno));
+	}
+
+	pid = fork();
+	ATF_REQUIRE_MSG(pid != -1, "fork failed: %s", strerror(errno));
+
+	if (pid == 0) {
+		/*
+		 * Child: perform semtimedop with negative sem_op, should
+		 * block until timeout
+		 */
+		sops.sem_num = 0;
+		sops.sem_op = -1;
+		sops.sem_flg = 0;
+
+		timeout.tv_sec = 2;
+		timeout.tv_nsec = 0;
+
+		if (semtimedop(semid, &sops, 1, &timeout) == -1) {
+			if (errno == EAGAIN || errno == EINTR) {
+				exit(0);	/* Expected */
+			}
+		}
+		exit(1);	/* Unexpected failure/success */
+	}
+
+	/* Parent: wait for child to finish */
+	waitpid(pid, &status, 0);
+	ATF_REQUIRE(WIFEXITED(status));
+	ATF_REQUIRE_EQ(WEXITSTATUS(status), 0);
+
+	/* Clean up */
+	ATF_REQUIRE_MSG(semctl(semid, 0, IPC_RMID) != -1,
+	    "semctl IPC_RMID failed: %s", strerror(errno));
+}
+
+/* semtimedop with SEM_UNDO adjusts semaphore on exit */
+ATF_TC(semtimedop_semundo);
+ATF_TC_HEAD(semtimedop_semundo, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "semtimedop with SEM_UNDO adjusts semaphore on exit");
+}
+
+ATF_TC_BODY(semtimedop_semundo, tc)
+{
+	key_t		key = IPC_PRIVATE;
+	int		semid;
+	struct sembuf	sops;
+	union semun	sun;
+	struct timespec	timeout;
+	pid_t		pid;
+	int		val;
+
+	/* Create semaphore set with 1 semaphore */
+	semid = semget(key, 1, IPC_CREAT | 0600);
+	ATF_REQUIRE_MSG(semid != -1, "semget failed: %s", strerror(errno));
+
+	/* Initialize semaphore to 0 */
+	sun.val = 0;
+	if (semctl(semid, 0, SETVAL, sun) == -1) {
+		ATF_REQUIRE_MSG(0, "semctl SETVAL failed: %s", strerror(errno));
+	}
+
+	pid = fork();
+	ATF_REQUIRE_MSG(pid != -1, "fork failed: %s", strerror(errno));
+
+	if (pid == 0) {
+		/* Child: perform semtimedop with SEM_UNDO */
+		sops.sem_num = 0;
+		sops.sem_op = 1;
+		sops.sem_flg = SEM_UNDO;
+
+		timeout.tv_sec = 1;
+		timeout.tv_nsec = 0;
+
+		if (semtimedop(semid, &sops, 1, &timeout) == -1) {
+			exit(1);	/* Unexpected failure */
+		}
+
+		exit(0); /* Exit normally, SEM_UNDO should be triggered */
+	}
+
+	/* Parent: wait for child to exit */
+	waitpid(pid, NULL, 0);
+
+	/* Check semaphore value; should be 0 after SEM_UNDO */
+	val = semctl(semid, 0, GETVAL);
+	ATF_REQUIRE_MSG(val == 0,
+	    "Semaphore value incorrect after SEM_UNDO: got %d, "
+	    "expected 0", val);
+
+	/* Clean up */
+	ATF_REQUIRE_MSG(semctl(semid, 0, IPC_RMID) != -1,
+	    "semctl IPC_RMID failed: %s", strerror(errno));
+}
+
+/* semtimedop handles invalid parameters correctly */
+ATF_TC(semtimedop_invalid);
+ATF_TC_HEAD(semtimedop_invalid, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "semtimedop handles invalid parameters correctly");
+}
+
+ATF_TC_BODY(semtimedop_invalid, tc)
+{
+	struct sembuf	sops;
+	union semun	sun;
+	struct timespec	timeout;
+
+	/* Invalid semaphore id */
+	sops.sem_num = 0;
+	sops.sem_op = -1;
+	sops.sem_flg = 0;
+
+	timeout.tv_sec = 1;
+	timeout.tv_nsec = 0;
+
+	/* Attempt to perform semtimedop on invalid semid */
+	ATF_REQUIRE_MSG(semtimedop(-1, &sops, 1, &timeout) == -1
+	    && errno == EINVAL, "semtimedop did not fail on invalid semid");
+
+	/* Create semaphore set */
+	key_t	key = IPC_PRIVATE;
+	int	semid = semget(key, 1, IPC_CREAT | 0600);
+	ATF_REQUIRE_MSG(semid != -1, "semget failed: %s", strerror(errno));
+
+	/* Initialize semaphore to 0 */
+	sun.val = 0;
+	if (semctl(semid, 0, SETVAL, sun) == -1) {
+		ATF_REQUIRE_MSG(0, "semctl SETVAL failed: %s", strerror(errno));
+	}
+
+	/* Set an invalid semaphore number */
+	sops.sem_num = 1;	/* Only 1 semaphore in set, index 0 */
+	sops.sem_op = 1;
+	sops.sem_flg = 0;
+
+	/* Attempt semtimedop with invalid sem_num */
+	ATF_REQUIRE_MSG(semtimedop(semid, &sops, 1, &timeout) == -1
+	    && errno == EFBIG, "semtimedop did not fail on invalid sem_num");
+
+	/* Clean up */
+	ATF_REQUIRE_MSG(semctl(semid, 0, IPC_RMID) != -1,
+	    "semctl IPC_RMID failed: %s", strerror(errno));
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, semtimedop_basic);
+	ATF_TP_ADD_TC(tp, semtimedop_timeout);
+	ATF_TP_ADD_TC(tp, semtimedop_semundo);
+	ATF_TP_ADD_TC(tp, semtimedop_invalid);
+
+	return atf_no_error();
+}