--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/gtest/memory/test_virtualspace.cpp Fri Oct 19 16:29:43 2018 -0700
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "precompiled.hpp"
+#include "memory/virtualspace.hpp"
+#include "runtime/os.hpp"
+#include "oops/oop.hpp"
+#include "utilities/align.hpp"
+#include "unittest.hpp"
+
+namespace {
+ class MemoryReleaser {
+ ReservedSpace* const _rs;
+ public:
+ MemoryReleaser(ReservedSpace* rs) : _rs(rs) { }
+ ~MemoryReleaser() {
+ if (_rs->special()) {
+ EXPECT_TRUE(os::release_memory_special(_rs->base(), _rs->size()));
+ } else {
+ EXPECT_TRUE(os::release_memory(_rs->base(), _rs->size()));
+ }
+ }
+ };
+
+ static void small_page_write(void* addr, size_t size) {
+ size_t page_size = os::vm_page_size();
+
+ char* end = (char*) addr + size;
+ for (char* p = (char*) addr; p < end; p += page_size) {
+ *p = 1;
+ }
+ }
+
+ // have to use these functions, as gtest's _PRED macros don't like is_aligned
+ // nor (is_aligned<size_t, size_t>)
+ static bool is_size_aligned(size_t size, size_t alignment) {
+ return is_aligned(size, alignment);
+ }
+ static bool is_ptr_aligned(void* ptr, size_t alignment) {
+ return is_aligned(ptr, alignment);
+ }
+
+ static void test_reserved_size(size_t size) {
+ ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity());
+
+ ReservedSpace rs(size);
+ MemoryReleaser releaser(&rs);
+
+ EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
+ EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
+
+ if (rs.special()) {
+ small_page_write(rs.base(), size);
+ }
+ }
+
+ static void test_reserved_size_alignment(size_t size, size_t alignment) {
+ ASSERT_PRED2(is_size_aligned, size, alignment) << "Incorrect input parameters";
+
+ ReservedSpace rs(size, alignment, UseLargePages, (char *) NULL);
+
+ ASSERT_TRUE(rs.base() != NULL) << "rs.special = " << rs.special();
+ ASSERT_EQ(size, rs.size()) << "rs.special = " << rs.special();
+
+ EXPECT_PRED2(is_ptr_aligned, rs.base(), alignment)
+ << "aligned sizes should always give aligned addresses";
+ EXPECT_PRED2(is_ptr_aligned, (void*) rs.size(), alignment)
+ << "aligned sizes should always give aligned addresses";
+
+ if (rs.special()) {
+ small_page_write(rs.base(), size);
+ }
+ }
+
+ static void test_reserved_size_alignment_page_type(size_t size, size_t alignment, bool maybe_large) {
+ if (size < alignment) {
+ // Tests might set -XX:LargePageSizeInBytes=<small pages> and cause unexpected input arguments for this test.
+ ASSERT_EQ((size_t) os::vm_page_size(), os::large_page_size()) << "Test needs further refinement";
+ return;
+ }
+
+ ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity()) << "Must be at least AG aligned";
+ ASSERT_PRED2(is_size_aligned, size, alignment) << "Must be at least AG aligned";
+
+ bool large = maybe_large && UseLargePages && size >= os::large_page_size();
+
+ ReservedSpace rs(size, alignment, large, false);
+ MemoryReleaser releaser(&rs);
+
+ EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
+ EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
+
+ if (rs.special()) {
+ small_page_write(rs.base(), size);
+ }
+ }
+}
+
+TEST_VM(ReservedSpace, size_alignment) {
+ size_t size = 2 * 1024 * 1024;
+ size_t ag = os::vm_allocation_granularity();
+
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size, ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 2, ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 10, ag));
+}
+
+TEST_VM(ReservedSpace, size) {
+ size_t size = 2 * 1024 * 1024;
+ size_t ag = os::vm_allocation_granularity();
+
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 1));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size - ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size + ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 - ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 + ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 - ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 + ag));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10 + size / 2));
+}
+
+TEST_VM(ReservedSpace, size_alignment_page_type) {
+ size_t ag = os::vm_allocation_granularity();
+
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag, ag , false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag , false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 3, ag , false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag * 2, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 2, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 2, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 4, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 4, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 16, ag * 4, false));
+}
+
+TEST_VM(ReservedSpace, size_alignment_page_type_large_page) {
+ if (!UseLargePages) {
+ return;
+ }
+
+ size_t ag = os::vm_allocation_granularity();
+ size_t lp = os::large_page_size();
+
+ // Without large pages
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, false));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, false));
+
+ // With large pages
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4 , true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, true));
+ EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, true));
+}