These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / testing / selftests / futex / functional / futex_wait_private_mapped_file.c

diff --git a/kernel/tools/testing/selftests/futex/functional/futex_wait_private_mapped_file.c b/kernel/tools/testing/selftests/futex/functional/futex_wait_private_mapped_file.c
new file mode 100644 (file)
index 0000000..5f687f2
--- /dev/null
+++ b/kernel/tools/testing/selftests/futex/functional/futex_wait_private_mapped_file.c
@@ -0,0 +1,125 @@
+/******************************************************************************
+ *
+ * Copyright FUJITSU LIMITED 2010
+ * Copyright KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ * DESCRIPTION
+ *      Internally, Futex has two handling mode, anon and file. The private file
+ *      mapping is special. At first it behave as file, but after write anything
+ *      it behave as anon. This test is intent to test such case.
+ *
+ * AUTHOR
+ *      KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
+ *
+ * HISTORY
+ *      2010-Jan-6: Initial version by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
+ *
+ *****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <syscall.h>
+#include <unistd.h>
+#include <errno.h>
+#include <linux/futex.h>
+#include <pthread.h>
+#include <libgen.h>
+#include <signal.h>
+
+#include "logging.h"
+#include "futextest.h"
+
+#define PAGE_SZ 4096
+
+char pad[PAGE_SZ] = {1};
+futex_t val = 1;
+char pad2[PAGE_SZ] = {1};
+
+#define WAKE_WAIT_US 3000000
+struct timespec wait_timeout = { .tv_sec = 5, .tv_nsec = 0};
+
+void usage(char *prog)
+{
+       printf("Usage: %s\n", prog);
+       printf("  -c    Use color\n");
+       printf("  -h    Display this help message\n");
+       printf("  -v L  Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
+              VQUIET, VCRITICAL, VINFO);
+}
+
+void *thr_futex_wait(void *arg)
+{
+       int ret;
+
+       info("futex wait\n");
+       ret = futex_wait(&val, 1, &wait_timeout, 0);
+       if (ret && errno != EWOULDBLOCK && errno != ETIMEDOUT) {
+               error("futex error.\n", errno);
+               print_result(RET_ERROR);
+               exit(RET_ERROR);
+       }
+
+       if (ret && errno == ETIMEDOUT)
+               fail("waiter timedout\n");
+
+       info("futex_wait: ret = %d, errno = %d\n", ret, errno);
+
+       return NULL;
+}
+
+int main(int argc, char **argv)
+{
+       pthread_t thr;
+       int ret = RET_PASS;
+       int res;
+       int c;
+
+       while ((c = getopt(argc, argv, "chv:")) != -1) {
+               switch (c) {
+               case 'c':
+                       log_color(1);
+                       break;
+               case 'h':
+                       usage(basename(argv[0]));
+                       exit(0);
+               case 'v':
+                       log_verbosity(atoi(optarg));
+                       break;
+               default:
+                       usage(basename(argv[0]));
+                       exit(1);
+               }
+       }
+
+       printf("%s: Test the futex value of private file mappings in FUTEX_WAIT\n",
+              basename(argv[0]));
+
+       ret = pthread_create(&thr, NULL, thr_futex_wait, NULL);
+       if (ret < 0) {
+               fprintf(stderr, "pthread_create error\n");
+               ret = RET_ERROR;
+               goto out;
+       }
+
+       info("wait a while\n");
+       usleep(WAKE_WAIT_US);
+       val = 2;
+       res = futex_wake(&val, 1, 0);
+       info("futex_wake %d\n", res);
+       if (res != 1) {
+               fail("FUTEX_WAKE didn't find the waiting thread.\n");
+               ret = RET_FAIL;
+       }
+
+       info("join\n");
+       pthread_join(thr, NULL);
+
+ out:
+       print_result(ret);
+       return ret;
+}