getrusage: Fix memory_stat_mapped_file when SIGBUS occurs in file map

Change-Id: Ia4686f32a3c888d5c886ab6cc6c2b510885447f5
Refs: #1422

test/issues/1422/filemap_sigbus.c

@@ -0,0 +1,49 @@
+/* filemap_sigbus.c COPYRIGHT FUJITSU LIMITED 2019 */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+
+int main(int argc, char *argv[])
+{
+	int ret = -1;
+	int fd = -1;
+	int i = 0;
+	unsigned long *buf = NULL;
+	const long pgsize = sysconf(_SC_PAGESIZE);
+
+	if (argc != 2) {
+		printf("args invalid.\n");
+		ret = 0;
+		goto out;
+	}
+
+	fd = open(argv[1], O_RDWR);
+	if (fd == -1) {
+		perror("open");
+		goto out;
+	}
+
+	buf = (unsigned long *)mmap(0, 3 * pgsize, PROT_READ | PROT_WRITE,
+		MAP_PRIVATE, fd, 0);
+	if (buf == MAP_FAILED) {
+		perror("mmap");
+		goto out;
+	}
+
+	/* Generate SIGBUS */
+	for (i = 0; i < 3 * pgsize / sizeof(unsigned long); i++) {
+		buf[i] = i;
+	}
+
+	munmap(buf, 3 * pgsize);
+
+	close(fd);
+
+	ret = 0;
+out:
+	return ret;
+}