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/*
* Copyright (c) 2016, 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/allocation.hpp"
#include "memory/metaspace/metachunk.hpp"
#include "unittest.hpp"
#include "utilities/align.hpp"
#include "utilities/copy.hpp"
#include "utilities/debug.hpp"
using namespace metaspace;
class MetachunkTest {
public:
static MetaWord* initial_top(Metachunk* metachunk) {
return metachunk->initial_top();
}
static MetaWord* top(Metachunk* metachunk) {
return metachunk->top();
}
};
TEST(Metachunk, basic) {
const ChunkIndex chunk_type = MediumIndex;
const bool is_class = false;
const size_t word_size = get_size_for_nonhumongous_chunktype(chunk_type, is_class);
// Allocate the chunk with correct alignment.
void* memory = malloc(word_size * BytesPerWord * 2);
ASSERT_TRUE(NULL != memory) << "Failed to malloc 2MB";
void* p_placement = align_up(memory, word_size * BytesPerWord);
Metachunk* metachunk = ::new (p_placement) Metachunk(chunk_type, is_class, word_size, NULL);
EXPECT_EQ((MetaWord*) metachunk, metachunk->bottom());
EXPECT_EQ((uintptr_t*) metachunk + metachunk->size(), metachunk->end());
// Check sizes
EXPECT_EQ(metachunk->size(), metachunk->word_size());
EXPECT_EQ(pointer_delta(metachunk->end(), metachunk->bottom(),
sizeof (MetaWord)),
metachunk->word_size());
// Check usage
EXPECT_EQ(metachunk->used_word_size(), metachunk->overhead());
EXPECT_EQ(metachunk->word_size() - metachunk->used_word_size(),
metachunk->free_word_size());
EXPECT_EQ(MetachunkTest::top(metachunk), MetachunkTest::initial_top(metachunk));
EXPECT_TRUE(metachunk->is_empty());
// Allocate
size_t alloc_size = 64; // Words
EXPECT_TRUE(is_aligned(alloc_size, Metachunk::object_alignment()));
MetaWord* mem = metachunk->allocate(alloc_size);
// Check post alloc
EXPECT_EQ(MetachunkTest::initial_top(metachunk), mem);
EXPECT_EQ(MetachunkTest::top(metachunk), mem + alloc_size);
EXPECT_EQ(metachunk->overhead() + alloc_size, metachunk->used_word_size());
EXPECT_EQ(metachunk->word_size() - metachunk->used_word_size(),
metachunk->free_word_size());
EXPECT_FALSE(metachunk->is_empty());
// Clear chunk
metachunk->reset_empty();
// Check post clear
EXPECT_EQ(metachunk->used_word_size(), metachunk->overhead());
EXPECT_EQ(metachunk->word_size() - metachunk->used_word_size(),
metachunk->free_word_size());
EXPECT_EQ(MetachunkTest::top(metachunk), MetachunkTest::initial_top(metachunk));
EXPECT_TRUE(metachunk->is_empty());
free(memory);
}
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