1 /* 2 * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "gc/z/zAddress.inline.hpp" 26 #include "gc/z/zForwarding.inline.hpp" 27 #include "gc/z/zGlobals.hpp" 28 #include "gc/z/zPage.inline.hpp" 29 #include "unittest.hpp" 30 31 using namespace testing; 32 33 #define CAPTURE_DELIM "\n" 34 #define CAPTURE1(expression) #expression << " evaluates to " << expression 35 #define CAPTURE2(e0, e1) CAPTURE1(e0) << CAPTURE_DELIM << CAPTURE1(e1) 36 37 #define CAPTURE(expression) CAPTURE1(expression) 38 39 class ZForwardingTest : public Test { 40 public: 41 // Helper functions 42 43 static bool is_power_of_2(uint32_t value) { 44 return ::is_power_of_2((intptr_t)value); 45 } 46 47 class SequenceToFromIndex : AllStatic { 48 public: 49 static uintptr_t even(uint32_t sequence_number) { 50 return sequence_number * 2; 51 } 52 static uintptr_t odd(uint32_t sequence_number) { 53 return even(sequence_number) + 1; 54 } 55 static uintptr_t one_to_one(uint32_t sequence_number) { 56 return sequence_number; 57 } 58 }; 59 60 // Test functions 61 62 static void setup(ZForwarding* forwarding) { 63 EXPECT_PRED1(is_power_of_2, forwarding->_entries.length()) << CAPTURE(forwarding->_entries.length()); 64 } 65 66 static void find_empty(ZForwarding* forwarding) { 67 uint32_t size = forwarding->_entries.length(); 68 uint32_t entries_to_check = size * 2; 69 70 for (uint32_t i = 0; i < entries_to_check; i++) { 71 uintptr_t from_index = SequenceToFromIndex::one_to_one(i); 72 73 EXPECT_FALSE(forwarding->find(from_index).populated()) << CAPTURE2(from_index, size); 74 } 75 } 76 77 static void find_full(ZForwarding* forwarding) { 78 uint32_t size = forwarding->_entries.length(); 79 uint32_t entries_to_populate = size; 80 81 // Populate 82 for (uint32_t i = 0; i < entries_to_populate; i++) { 83 uintptr_t from_index = SequenceToFromIndex::one_to_one(i); 84 85 ZForwardingCursor cursor; 86 ZForwardingEntry entry = forwarding->find(from_index, &cursor); 87 ASSERT_FALSE(entry.populated()) << CAPTURE2(from_index, size); 88 89 forwarding->insert(from_index, from_index, &cursor); 90 } 91 92 // Verify 93 for (uint32_t i = 0; i < entries_to_populate; i++) { 94 uintptr_t from_index = SequenceToFromIndex::one_to_one(i); 95 96 ZForwardingEntry entry = forwarding->find(from_index); 97 ASSERT_TRUE(entry.populated()) << CAPTURE2(from_index, size); 98 99 ASSERT_EQ(entry.from_index(), from_index) << CAPTURE(size); 100 ASSERT_EQ(entry.to_offset(), from_index) << CAPTURE(size); 101 } 102 } 103 104 static void find_every_other(ZForwarding* forwarding) { 105 uint32_t size = forwarding->_entries.length(); 106 uint32_t entries_to_populate = size / 2; 107 108 // Populate even from indices 109 for (uint32_t i = 0; i < entries_to_populate; i++) { 110 uintptr_t from_index = SequenceToFromIndex::even(i); 111 112 ZForwardingCursor cursor; 113 ZForwardingEntry entry = forwarding->find(from_index, &cursor); 114 ASSERT_FALSE(entry.populated()) << CAPTURE2(from_index, size); 115 116 forwarding->insert(from_index, from_index, &cursor); 117 } 118 119 // Verify populated even indices 120 for (uint32_t i = 0; i < entries_to_populate; i++) { 121 uintptr_t from_index = SequenceToFromIndex::even(i); 122 123 ZForwardingCursor cursor; 124 ZForwardingEntry entry = forwarding->find(from_index, &cursor); 125 ASSERT_TRUE(entry.populated()) << CAPTURE2(from_index, size); 126 127 ASSERT_EQ(entry.from_index(), from_index) << CAPTURE(size); 128 ASSERT_EQ(entry.to_offset(), from_index) << CAPTURE(size); 129 } 130 131 // Verify empty odd indices 132 // 133 // This check could be done on a larger range of sequence numbers, 134 // but currently entries_to_populate is used. 135 for (uint32_t i = 0; i < entries_to_populate; i++) { 136 uintptr_t from_index = SequenceToFromIndex::odd(i); 137 138 ZForwardingEntry entry = forwarding->find(from_index); 139 140 ASSERT_FALSE(entry.populated()) << CAPTURE2(from_index, size); 141 } 142 } 143 144 static void test(void (*function)(ZForwarding*), uint32_t size) { 145 // Create page 146 const ZVirtualMemory vmem(0, ZPageSizeSmall); 147 const ZPhysicalMemory pmem(ZPhysicalMemorySegment(0, ZPageSizeSmall)); 148 ZPage page(ZPageTypeSmall, vmem, pmem); 149 150 page.reset(); 151 152 const size_t object_size = 16; 153 const uintptr_t object = page.alloc_object(object_size); 154 155 ZGlobalSeqNum++; 156 157 bool dummy = false; 158 page.mark_object(ZAddress::marked(object), dummy, dummy); 159 160 const uint32_t live_objects = size; 161 const uint32_t live_bytes = live_objects * object_size; 162 page.inc_live_atomic(live_objects, live_bytes); 163 164 // Setup forwarding 165 ZForwarding* const forwarding = ZForwarding::create(&page); 166 167 // Actual test function 168 (*function)(forwarding); 169 170 // Teardown forwarding 171 ZForwarding::destroy(forwarding); 172 173 // Teardown page 174 page.physical_memory().clear(); 175 } 176 177 // Run the given function with a few different input values. 178 static void test(void (*function)(ZForwarding*)) { 179 test(function, 1); 180 test(function, 2); 181 test(function, 3); 182 test(function, 4); 183 test(function, 7); 184 test(function, 8); 185 test(function, 1023); 186 test(function, 1024); 187 test(function, 1025); 188 } 189 }; 190 191 TEST_F(ZForwardingTest, setup) { 192 test(&ZForwardingTest::setup); 193 } 194 195 TEST_F(ZForwardingTest, find_empty) { 196 test(&ZForwardingTest::find_empty); 197 } 198 199 TEST_F(ZForwardingTest, find_full) { 200 test(&ZForwardingTest::find_full); 201 } 202 203 TEST_F(ZForwardingTest, find_every_other) { 204 test(&ZForwardingTest::find_every_other); 205 }