shmobj: support large page

Change-Id: I104c1b8551b87f5cbfedb13262e77c00c38e9643

test/issues/1381/C1381T01.c

@@ -0,0 +1,106 @@
+#define _GNU_SOURCE
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define PAGES 3
+#define MAP_HUGE_SHIFT 26
+
+static unsigned long ps, hps;
+
+void *test_mmap(unsigned long size, int pgshift)
+{
+	int lp_flags = 0;
+
+	if (pgshift != 0) {
+		lp_flags = MAP_HUGETLB | (pgshift << MAP_HUGE_SHIFT);
+	}
+
+	return mmap(NULL, size, PROT_WRITE | PROT_READ,
+			MAP_ANONYMOUS | MAP_SHARED |
+			lp_flags,
+			-1, 0);
+}
+
+int main(int argc, char **argv)
+{
+	void *addr;
+	int i, pgshift, err, ret = 0;
+	size_t size;
+
+	if (argc < 2) {
+		printf("error: too few arguments\n");
+		ret = -1;
+		goto out;
+	}
+	pgshift = atoi(argv[1]);
+	hps = (1 << pgshift);
+	ps = getpagesize();
+
+	printf("** Case 1: specified MAP_HUGETLB\n");
+	size = hps * PAGES;
+	addr = test_mmap(size, pgshift);
+	if (addr == MAP_FAILED) {
+		perror("mmap fail: ");
+		ret = -1;
+	}
+
+	memset(addr, 'a', size);
+	errno = 0;
+	err = munmap(addr + size - ps, ps);
+	if (err == -1 && errno == EINVAL) {
+		printf("[OK] munmap returned %d and errno: EINVAL\n", err);
+	}
+	else {
+		printf("[NG] munamp succceeded\n");
+		ret = -1;
+//		goto out;
+	}
+
+	printf("** Case 2: size is aligned on large page\n");
+	size = hps * PAGES;
+	addr = test_mmap(size, 0);
+	if (addr == MAP_FAILED) {
+		perror("mmap fail: ");
+		ret = -1;
+	}
+
+	memset(addr, 'a', size);
+	errno = 0;
+	err = munmap(addr + size - ps, ps);
+	if (err == -1 && errno == EINVAL) {
+		printf("[OK] munmap returned %d and errno: EINVAL\n", err);
+	}
+	else {
+		printf("[NG] munamp succceeded\n");
+		ret = -1;
+//		goto out;
+	}
+
+	printf("** Case 3: size is NOT aligned on large page\n");
+	size = hps * PAGES - ps;
+	addr = test_mmap(size, 0);
+	if (addr == MAP_FAILED) {
+		perror("mmap fail: ");
+		ret = -1;
+	}
+
+	memset(addr, 'a', size);
+	errno = 0;
+	err = munmap(addr + size - ps, ps);
+	if (err == 0 && errno == 0) {
+		printf("[OK] munamp succceeded\n");
+	}
+	else {
+		printf("[NG] munmap returned %d and errno: EINVAL\n", err);
+		ret = -1;
+//		goto out;
+	}
+
+out:
+	return ret;
+}