--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/gtest/gc/z/test_zBitMap.cpp Tue Jun 12 17:40:28 2018 +0200
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
+ */
+
+#include "precompiled.hpp"
+#include "gc/z/zBitMap.inline.hpp"
+#include "unittest.hpp"
+
+class ZBitMapTest : public ::testing::Test {
+protected:
+ static void test_set_pair_unset(size_t size, bool finalizable) {
+ ZBitMap bitmap(size);
+
+ for (BitMap::idx_t i = 0; i < size - 1; i++) {
+ if ((i + 1) % BitsPerWord == 0) {
+ // Can't set pairs of bits in different words.
+ continue;
+ }
+
+ // ZBitMaps are not cleared when constructed.
+ bitmap.clear();
+
+ bool inc_live = false;
+
+ bool ret = bitmap.par_set_bit_pair(i, finalizable, inc_live);
+ EXPECT_TRUE(ret) << "Failed to set bit";
+ EXPECT_TRUE(inc_live) << "Should have set inc_live";
+
+ // First bit should always be set
+ EXPECT_TRUE(bitmap.at(i)) << "Should be set";
+
+ // Second bit should only be set when marking strong
+ EXPECT_NE(bitmap.at(i + 1), finalizable);
+ }
+ }
+
+ static void test_set_pair_set(size_t size, bool finalizable) {
+ ZBitMap bitmap(size);
+
+ for (BitMap::idx_t i = 0; i < size - 1; i++) {
+ if ((i + 1) % BitsPerWord == 0) {
+ // Can't set pairs of bits in different words.
+ continue;
+ }
+
+ // Fill the bitmap with ones.
+ bitmap.set_range(0, size);
+
+ bool inc_live = false;
+
+ bool ret = bitmap.par_set_bit_pair(i, finalizable, inc_live);
+ EXPECT_FALSE(ret) << "Should not succeed setting bit";
+ EXPECT_FALSE(inc_live) << "Should not have set inc_live";
+
+ // Both bits were pre-set.
+ EXPECT_TRUE(bitmap.at(i)) << "Should be set";
+ EXPECT_TRUE(bitmap.at(i + 1)) << "Should be set";
+ }
+ }
+
+ static void test_set_pair_set(bool finalizable) {
+ test_set_pair_set(2, finalizable);
+ test_set_pair_set(62, finalizable);
+ test_set_pair_set(64, finalizable);
+ test_set_pair_set(66, finalizable);
+ test_set_pair_set(126, finalizable);
+ test_set_pair_set(128, finalizable);
+ }
+
+ static void test_set_pair_unset(bool finalizable) {
+ test_set_pair_unset(2, finalizable);
+ test_set_pair_unset(62, finalizable);
+ test_set_pair_unset(64, finalizable);
+ test_set_pair_unset(66, finalizable);
+ test_set_pair_unset(126, finalizable);
+ test_set_pair_unset(128, finalizable);
+ }
+
+};
+
+TEST_F(ZBitMapTest, test_set_pair_set) {
+ test_set_pair_set(false);
+ test_set_pair_set(true);
+}
+
+TEST_F(ZBitMapTest, test_set_pair_unset) {
+ test_set_pair_unset(false);
+ test_set_pair_unset(true);
+}