remote_page_fault is handled by the offloaded thread.

Change-Id: I9cfad509260cceada74abdf39ca6a1822561e0d9
Refs: #1474

test/issues/1474/C1474T06.c

@@ -0,0 +1,99 @@
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+#include <sched.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <errno.h>
+
+int ok;
+
+void *
+util_thread(void *arg)
+{
+	char *p = arg;
+	int f;
+	int r;
+
+	r = syscall(732);
+	if (r == -1) {
+		fprintf(stderr, "thread is running on Linux OK\n");
+	}
+	else {
+		fprintf(stderr, "thread is running on McKernel NG(%d)\n", r);
+		ok = -1;
+		return NULL;
+	}
+	while (ok == 0)
+		;
+
+	f = open("outfile", O_WRONLY|O_CREAT|O_TRUNC, 0600);
+	if (f == -1) {
+		perror("open(outfile)");
+		ok = -1;
+		return NULL;
+	}
+	if ((r = write(f, p, 1024)) == -1) {
+		perror("write");
+		ok = -1;
+		return NULL;
+	}
+	fprintf(stderr, "remote page fault OK\n");
+	close(f);
+	if (r != 1024) {
+		fprintf(stderr, "BAD out size: %d\n", r);
+		ok = -1;
+		return NULL;
+	}
+	ok = 1;
+	return NULL;
+}
+
+int
+main(int argc, char **argv)
+{
+	int f;
+	int r;
+	char *p;
+	pthread_t thr;
+
+	fprintf(stderr, "*** C1474T06 START ***\n");
+	if ((f = open("testfile", O_RDONLY)) == -1) {
+		perror("open(testfile)");
+		goto ng;
+	}
+	p = mmap(NULL, 4096, PROT_READ, MAP_SHARED, f, 0);
+	if (p == (void *)-1) {
+		perror("mmap");
+		goto ng;
+	}
+	close(f);
+
+	r = syscall(731, 1, NULL);
+	if (r) {
+		fprintf(stderr, "util_indicate_clone r=%d, err=%d\n", r, errno);
+		goto ng;
+	}
+	r = pthread_create(&thr, NULL, util_thread, p);
+	if (r) {
+		fprintf(stderr, "pthread_create: %d\n", r);
+		goto ng;
+	}
+
+	ok = 2;
+	while (ok == 2)
+		;
+	pthread_join(thr, NULL);
+	if (ok == 1) {
+		fprintf(stderr, "*** C1474T06 OK ***\n");
+		exit(0);
+	}
+ng:
+	fprintf(stderr, "*** C1474T06 NG ***\n");
+	exit(1);
+}