[PATCH 1/3] selftests/futex: Migrate futex_wait to harness

[Wake Liu <wakel@google.com>]

Migrate futex_wait test to the kselftest harness framework,
removing mixed legacy ksft_* API usages and ensuring proper thread joining.

Signed-off-by: Wake Liu <wakel@google.com>
---
 .../selftests/futex/functional/futex_wait.c   | 125 +++++++++++-------
 1 file changed, 77 insertions(+), 48 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/futex_wait.c b/tools/testing/selftests/futex/functional/futex_wait.c
index 7b8879409007..ed4b040600b8 100644
--- a/tools/testing/selftests/futex/functional/futex_wait.c
+++ b/tools/testing/selftests/futex/functional/futex_wait.c
@@ -9,6 +9,7 @@
 #include <sys/shm.h>
 #include <sys/mman.h>
 #include <fcntl.h>
+#include <stdlib.h>
 
 #include "futextest.h"
 #include "kselftest_harness.h"
@@ -19,125 +20,153 @@
 
 void *futex;
 
+struct waiter_args {
+	struct __test_metadata *_metadata;
+	unsigned int flags;
+};
+
 static void *waiterfn(void *arg)
 {
+	struct waiter_args *args = (struct waiter_args *)arg;
+	struct __test_metadata *_metadata = args->_metadata;
 	struct timespec to;
-	unsigned int flags = 0;
-
-	if (arg)
-		flags = *((unsigned int *) arg);
+	int res;
 
 	to.tv_sec = 0;
 	to.tv_nsec = timeout_ns;
 
-	if (futex_wait(futex, 0, &to, flags))
-		printf("waiter failed errno %d\n", errno);
+	res = futex_wait(futex, 0, &to, args->flags);
+	if (res) {
+		EXPECT_EQ(res, 0)
+			TH_LOG("waiter failed errno %d: %s", errno, strerror(errno));
+	}
 
+	free(args);
 	return NULL;
 }
 
 TEST(private_futex)
 {
-	unsigned int flags = FUTEX_PRIVATE_FLAG;
+	struct waiter_args *args = malloc(sizeof(*args));
 	u_int32_t f_private = 0;
 	pthread_t waiter;
 	int res;
 
+	args->_metadata = _metadata;
+	args->flags = FUTEX_PRIVATE_FLAG;
 	futex = &f_private;
 
 	/* Testing a private futex */
-	ksft_print_dbg_msg("Calling private futex_wait on futex: %p\n", futex);
-	if (pthread_create(&waiter, NULL, waiterfn, (void *) &flags))
-		ksft_exit_fail_msg("pthread_create failed\n");
+	TH_LOG("Calling private futex_wait on futex: %p", futex);
+	ASSERT_EQ(pthread_create(&waiter, NULL, waiterfn, args), 0)
+		TH_LOG("pthread_create failed");
 
 	usleep(WAKE_WAIT_US);
 
-	ksft_print_dbg_msg("Calling private futex_wake on futex: %p\n", futex);
+	TH_LOG("Calling private futex_wake on futex: %p", futex);
 	res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG);
-	if (res != 1) {
-		ksft_test_result_fail("futex_wake private returned: %d %s\n",
-				      errno, strerror(errno));
-	} else {
-		ksft_test_result_pass("futex_wake private succeeds\n");
-	}
+	EXPECT_EQ(res, 1)
+		TH_LOG("futex_wake private returned: %d %s", res, res < 0 ? strerror(errno) : "");
+
+	pthread_join(waiter, NULL);
 }
 
 TEST(anon_page)
 {
+	struct waiter_args *args = malloc(sizeof(*args));
 	u_int32_t *shared_data;
 	pthread_t waiter;
 	int res, shm_id;
 
+	args->_metadata = _metadata;
+	args->flags = 0;
+
 	/* Testing an anon page shared memory */
 	shm_id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0666);
 	if (shm_id < 0) {
-		if (errno == ENOSYS)
-			ksft_exit_skip("shmget syscall not supported\n");
-		perror("shmget");
-		exit(1);
+		if (errno == ENOSYS) {
+			free(args);
+			SKIP(return, "shmget syscall not supported");
+		}
+		ASSERT_GE(shm_id, 0)
+			TH_LOG("shmget failed: %s", strerror(errno));
 	}
 
 	shared_data = shmat(shm_id, NULL, 0);
+	if (shared_data == (void *)-1) {
+		free(args);
+		ASSERT_NE(shared_data, (void *)-1)
+			TH_LOG("shmat failed: %s", strerror(errno));
+	}
 
 	*shared_data = 0;
 	futex = shared_data;
 
-	ksft_print_dbg_msg("Calling shared (page anon) futex_wait on futex: %p\n", futex);
-	if (pthread_create(&waiter, NULL, waiterfn, NULL))
-		ksft_exit_fail_msg("pthread_create failed\n");
+	TH_LOG("Calling shared (page anon) futex_wait on futex: %p", futex);
+	ASSERT_EQ(pthread_create(&waiter, NULL, waiterfn, args), 0)
+		TH_LOG("pthread_create failed");
 
 	usleep(WAKE_WAIT_US);
 
-	ksft_print_dbg_msg("Calling shared (page anon) futex_wake on futex: %p\n", futex);
+	TH_LOG("Calling shared (page anon) futex_wake on futex: %p", futex);
 	res = futex_wake(futex, 1, 0);
-	if (res != 1) {
-		ksft_test_result_fail("futex_wake shared (page anon) returned: %d %s\n",
-				      errno, strerror(errno));
-	} else {
-		ksft_test_result_pass("futex_wake shared (page anon) succeeds\n");
-	}
+	EXPECT_EQ(res, 1)
+		TH_LOG("futex_wake shared (page anon) returned: %d %s", res, res < 0 ? strerror(errno) : "");
 
+	pthread_join(waiter, NULL);
 	shmdt(shared_data);
 }
 
 TEST(file_backed)
 {
+	struct waiter_args *args = malloc(sizeof(*args));
 	u_int32_t f_private = 0;
 	pthread_t waiter;
 	int res, fd;
 	void *shm;
 
+	args->_metadata = _metadata;
+	args->flags = 0;
+
 	/* Testing a file backed shared memory */
-	fd = open(SHM_PATH, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
-	if (fd < 0)
-		ksft_exit_fail_msg("open\n");
+	fd = open(SHM_PATH, O_RDWR | O_CREAT, 0600);
+	if (fd < 0) {
+		free(args);
+		ASSERT_GE(fd, 0)
+			TH_LOG("open failed: %s", strerror(errno));
+	}
 
-	if (ftruncate(fd, sizeof(f_private)))
-		ksft_exit_fail_msg("ftruncate\n");
+	if (ftruncate(fd, sizeof(f_private))) {
+		free(args);
+		close(fd);
+		ASSERT_TRUE(0)
+			TH_LOG("ftruncate failed: %s", strerror(errno));
+	}
 
 	shm = mmap(NULL, sizeof(f_private), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-	if (shm == MAP_FAILED)
-		ksft_exit_fail_msg("mmap\n");
+	if (shm == MAP_FAILED) {
+		free(args);
+		close(fd);
+		ASSERT_NE(shm, MAP_FAILED)
+			TH_LOG("mmap failed: %s", strerror(errno));
+	}
 
 	memcpy(shm, &f_private, sizeof(f_private));
 
 	futex = shm;
 
-	ksft_print_dbg_msg("Calling shared (file backed) futex_wait on futex: %p\n", futex);
-	if (pthread_create(&waiter, NULL, waiterfn, NULL))
-		ksft_exit_fail_msg("pthread_create failed\n");
+	TH_LOG("Calling shared (file backed) futex_wait on futex: %p", futex);
+	ASSERT_EQ(pthread_create(&waiter, NULL, waiterfn, args), 0)
+		TH_LOG("pthread_create failed");
 
 	usleep(WAKE_WAIT_US);
 
-	ksft_print_dbg_msg("Calling shared (file backed) futex_wake on futex: %p\n", futex);
+	TH_LOG("Calling shared (file backed) futex_wake on futex: %p", futex);
 	res = futex_wake(shm, 1, 0);
-	if (res != 1) {
-		ksft_test_result_fail("futex_wake shared (file backed) returned: %d %s\n",
-				      errno, strerror(errno));
-	} else {
-		ksft_test_result_pass("futex_wake shared (file backed) succeeds\n");
-	}
+	EXPECT_EQ(res, 1)
+		TH_LOG("futex_wake shared (file backed) returned: %d %s", res, res < 0 ? strerror(errno) : "");
 
+	pthread_join(waiter, NULL);
 	munmap(shm, sizeof(f_private));
 	remove(SHM_PATH);
 	close(fd);
-- 
2.54.0.746.g67dd491aae-goog