| /* |
| * Copyright (c) 2013, 2016, 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 "gc/g1/g1BiasedArray.hpp" |
| #include "unittest.hpp" |
| |
| class TestMappedArray : public G1BiasedMappedArray<int> { |
| public: |
| virtual int default_value() const { |
| return 0xBAADBABE; |
| } |
| int* my_address_mapped_to(HeapWord* address) { |
| return address_mapped_to(address); |
| } |
| }; |
| |
| TEST_VM(G1BiasedArray, simple) { |
| const size_t REGION_SIZE_IN_WORDS = 512; |
| const size_t NUM_REGIONS = 20; |
| // Any value that is non-zero |
| HeapWord* fake_heap = |
| (HeapWord*) LP64_ONLY(0xBAAA00000) NOT_LP64(0xBA000000); |
| |
| TestMappedArray array; |
| array.initialize(fake_heap, fake_heap + REGION_SIZE_IN_WORDS * NUM_REGIONS, |
| REGION_SIZE_IN_WORDS * HeapWordSize); |
| const int DEFAULT_VALUE = array.default_value(); |
| |
| // Check address calculation (bounds) |
| ASSERT_EQ(fake_heap, array.bottom_address_mapped()) |
| << "bottom mapped address should be " |
| << p2i(array.bottom_address_mapped()) |
| << ", but is " |
| << p2i(fake_heap); |
| ASSERT_EQ(fake_heap + REGION_SIZE_IN_WORDS * NUM_REGIONS, |
| array.end_address_mapped()); |
| |
| int* bottom = array.my_address_mapped_to(fake_heap); |
| ASSERT_EQ((void*) bottom, (void*) array.base()); |
| int* end = array.my_address_mapped_to(fake_heap + |
| REGION_SIZE_IN_WORDS * NUM_REGIONS); |
| ASSERT_EQ((void*) end, (void*) (array.base() + array.length())); |
| // The entire array should contain default value elements |
| for (int* current = bottom; current < end; current++) { |
| ASSERT_EQ(DEFAULT_VALUE, *current); |
| } |
| |
| // Test setting values in the table |
| HeapWord* region_start_address = |
| fake_heap + REGION_SIZE_IN_WORDS * (NUM_REGIONS / 2); |
| HeapWord* region_end_address = |
| fake_heap + (REGION_SIZE_IN_WORDS * (NUM_REGIONS / 2) + |
| REGION_SIZE_IN_WORDS - 1); |
| |
| // Set/get by address tests: invert some value; first retrieve one |
| int actual_value = array.get_by_index(NUM_REGIONS / 2); |
| array.set_by_index(NUM_REGIONS / 2, ~actual_value); |
| // Get the same value by address, should correspond to the start of the "region" |
| int value = array.get_by_address(region_start_address); |
| ASSERT_EQ(value, ~actual_value); |
| // Get the same value by address, at one HeapWord before the start |
| value = array.get_by_address(region_start_address - 1); |
| ASSERT_EQ(DEFAULT_VALUE, value); |
| // Get the same value by address, at the end of the "region" |
| value = array.get_by_address(region_end_address); |
| ASSERT_EQ(value, ~actual_value); |
| // Make sure the next value maps to another index |
| value = array.get_by_address(region_end_address + 1); |
| ASSERT_EQ(DEFAULT_VALUE, value); |
| |
| // Reset the value in the array |
| array.set_by_address(region_start_address + |
| (region_end_address - region_start_address) / 2, |
| actual_value); |
| |
| // The entire array should have the default value again |
| for (int* current = bottom; current < end; current++) { |
| ASSERT_EQ(DEFAULT_VALUE, *current); |
| } |
| |
| // Set/get by index tests: invert some value |
| size_t index = NUM_REGIONS / 2; |
| actual_value = array.get_by_index(index); |
| array.set_by_index(index, ~actual_value); |
| |
| value = array.get_by_index(index); |
| ASSERT_EQ(~actual_value, value); |
| |
| value = array.get_by_index(index - 1); |
| ASSERT_EQ(DEFAULT_VALUE, value); |
| |
| value = array.get_by_index(index + 1); |
| ASSERT_EQ(DEFAULT_VALUE, value); |
| |
| array.set_by_index(0, 0); |
| value = array.get_by_index(0); |
| ASSERT_EQ(0, value); |
| |
| array.set_by_index(array.length() - 1, 0); |
| value = array.get_by_index(array.length() - 1); |
| ASSERT_EQ(0, value); |
| |
| array.set_by_index(index, 0); |
| |
| // The array should have three zeros, and default values otherwise |
| size_t num_zeros = 0; |
| for (int* current = bottom; current < end; current++) { |
| ASSERT_TRUE(*current == DEFAULT_VALUE || *current == 0); |
| if (*current == 0) { |
| num_zeros++; |
| } |
| } |
| ASSERT_EQ((size_t) 3, num_zeros); |
| } |
| |