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/*
* Copyright (c) 2016, 2022, 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 "logging/logStream.hpp"
#include "memory/arena.hpp"
#include "memory/resourceArea.hpp"
#include "utilities/bitMap.inline.hpp"
#include "unittest.hpp"
class BitMapTest {
template <class ResizableBitMapClass>
static void fillBitMap(ResizableBitMapClass& map) {
map.set_bit(1);
map.set_bit(3);
map.set_bit(17);
map.set_bit(512);
}
template <class ResizableBitMapClass>
static void testResize(BitMap::idx_t start_size) {
ResourceMark rm;
ResizableBitMapClass map(start_size);
map.resize(BITMAP_SIZE);
fillBitMap(map);
ResizableBitMapClass map2(BITMAP_SIZE);
fillBitMap(map2);
EXPECT_TRUE(map.is_same(map2)) << "With start_size " << start_size;
}
public:
const static BitMap::idx_t BITMAP_SIZE = 1024;
template <class ResizableBitMapClass>
static void testResizeGrow() {
testResize<ResizableBitMapClass>(0);
testResize<ResizableBitMapClass>(BITMAP_SIZE >> 3);
}
template <class ResizableBitMapClass>
static void testResizeSame() {
testResize<ResizableBitMapClass>(BITMAP_SIZE);
}
template <class ResizableBitMapClass>
static void testResizeShrink() {
testResize<ResizableBitMapClass>(BITMAP_SIZE * 2);
}
template <class InitializableBitMapClass>
static void testInitialize() {
ResourceMark rm;
InitializableBitMapClass map;
map.initialize(BITMAP_SIZE);
fillBitMap(map);
InitializableBitMapClass map2(BITMAP_SIZE);
fillBitMap(map2);
EXPECT_TRUE(map.is_same(map2));
}
template <class ReinitializableBitMapClass>
static void testReinitialize(BitMap::idx_t init_size) {
ResourceMark rm;
ReinitializableBitMapClass map(init_size);
map.reinitialize(BITMAP_SIZE);
fillBitMap(map);
ReinitializableBitMapClass map2(BITMAP_SIZE);
fillBitMap(map2);
EXPECT_TRUE(map.is_same(map2)) << "With init_size " << init_size;
}
#ifdef ASSERT
template <class PrintableBitMapClass>
static void testPrintOn(BitMap::idx_t size) {
ResourceMark rm;
PrintableBitMapClass map(size);
if (size > 0) {
map.set_bit(size / 2);
}
LogStreamHandle(Info, test) stream;
map.print_on(&stream);
}
#endif
};
// TestArenaBitMap is the shorthand combination of Arena and ArenaBitMap.
// Multiple inheritance guarantees to construct Arena first.
class TestArenaBitMap : private Arena, public ArenaBitMap {
public:
TestArenaBitMap() : TestArenaBitMap(0) {}
TestArenaBitMap(idx_t size_in_bits, bool clear = true) : Arena(mtTest),
ArenaBitMap(static_cast<Arena*>(this), size_in_bits, clear) {}
};
class TestCHeapBitMap : public CHeapBitMap {
public:
TestCHeapBitMap(size_t size = 0) : CHeapBitMap(size, mtTest) {}
};
TEST_VM(BitMap, resize_grow) {
BitMapTest::testResizeGrow<ResourceBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ResourceBitMap";
BitMapTest::testResizeGrow<TestCHeapBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type CHeapBitMap";
BitMapTest::testResizeGrow<TestArenaBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ArenaBitMap";
}
TEST_VM(BitMap, resize_shrink) {
BitMapTest::testResizeShrink<ResourceBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ResourceBitMap";
BitMapTest::testResizeShrink<TestCHeapBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type CHeapBitMap";
BitMapTest::testResizeShrink<TestArenaBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ArenaBitMap";
}
TEST_VM(BitMap, resize_same) {
BitMapTest::testResizeSame<ResourceBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ResourceBitMap";
BitMapTest::testResizeSame<TestCHeapBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type CHeapBitMap";
BitMapTest::testResizeSame<TestArenaBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ArenaBitMap";
}
// Verify that when growing with clear, all added bits get cleared,
// even those corresponding to a partial word after the old size.
TEST_VM(BitMap, resize_grow_clear) {
ResourceMark rm;
const size_t word_size = sizeof(BitMap::bm_word_t) * BitsPerByte;
const size_t size = 4 * word_size;
ResourceBitMap bm(size, true /* clear */);
bm.set_bit(size - 1);
EXPECT_EQ(bm.count_one_bits(), size_t(1));
// Discard the only set bit. But it might still be "set" in the
// partial word beyond the new size.
bm.resize(size - word_size/2);
EXPECT_EQ(bm.count_one_bits(), size_t(0));
// Grow to include the previously set bit. Verify that it ended up cleared.
bm.resize(2 * size);
EXPECT_EQ(bm.count_one_bits(), size_t(0));
}
TEST_VM(BitMap, initialize) {
BitMapTest::testInitialize<ResourceBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ResourceBitMap";
BitMapTest::testInitialize<TestCHeapBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type CHeapBitMap";
BitMapTest::testInitialize<TestArenaBitMap>();
EXPECT_FALSE(HasFailure()) << "Failed on type ArenaBitMap";
}
TEST_VM(BitMap, reinitialize) {
constexpr BitMap::idx_t sizes[] = {0, BitMapTest::BITMAP_SIZE >> 3, BitMapTest::BITMAP_SIZE};
for (auto size : sizes) {
BitMapTest::testReinitialize<ResourceBitMap>(size);
BitMapTest::testReinitialize<TestArenaBitMap>(size);
}
}
#ifdef ASSERT
TEST_VM(BitMap, print_on) {
constexpr BitMap::idx_t sizes[] = {0, BitMapTest::BITMAP_SIZE >> 3, BitMapTest::BITMAP_SIZE};
for (auto size : sizes) {
BitMapTest::testPrintOn<ResourceBitMap>(size);
BitMapTest::testPrintOn<TestArenaBitMap>(size);
}
}
#endif
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