1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ART_RUNTIME_ASM_SUPPORT_H_ 18#define ART_RUNTIME_ASM_SUPPORT_H_ 19 20#if defined(__cplusplus) 21#include "art_method.h" 22#include "lock_word.h" 23#include "mirror/class.h" 24#include "mirror/string.h" 25#include "runtime.h" 26#include "thread.h" 27#endif 28 29#include "read_barrier_c.h" 30 31#if defined(__arm__) || defined(__mips__) 32// In quick code for ARM and MIPS we make poor use of registers and perform frequent suspend 33// checks in the event of loop back edges. The SUSPEND_CHECK_INTERVAL constant is loaded into a 34// register at the point of an up-call or after handling a suspend check. It reduces the number of 35// loads of the TLS suspend check value by the given amount (turning it into a decrement and compare 36// of a register). This increases the time for a thread to respond to requests from GC and the 37// debugger, damaging GC performance and creating other unwanted artifacts. For example, this count 38// has the effect of making loops and Java code look cold in profilers, where the count is reset 39// impacts where samples will occur. Reducing the count as much as possible improves profiler 40// accuracy in tools like traceview. 41// TODO: get a compiler that can do a proper job of loop optimization and remove this. 42#define SUSPEND_CHECK_INTERVAL 96 43#endif 44 45#if defined(__cplusplus) 46 47#ifndef ADD_TEST_EQ // Allow #include-r to replace with their own. 48#define ADD_TEST_EQ(x, y) CHECK_EQ(x, y); 49#endif 50 51static inline void CheckAsmSupportOffsetsAndSizes() { 52#else 53#define ADD_TEST_EQ(x, y) 54#endif 55 56// Size of references to the heap on the stack. 57#define STACK_REFERENCE_SIZE 4 58ADD_TEST_EQ(static_cast<size_t>(STACK_REFERENCE_SIZE), sizeof(art::StackReference<art::mirror::Object>)) 59 60// Size of heap references 61#define COMPRESSED_REFERENCE_SIZE 4 62ADD_TEST_EQ(static_cast<size_t>(COMPRESSED_REFERENCE_SIZE), 63 sizeof(art::mirror::CompressedReference<art::mirror::Object>)) 64 65// Note: these callee save methods loads require read barriers. 66// Offset of field Runtime::callee_save_methods_[kSaveAll] 67#define RUNTIME_SAVE_ALL_CALLEE_SAVE_FRAME_OFFSET 0 68ADD_TEST_EQ(static_cast<size_t>(RUNTIME_SAVE_ALL_CALLEE_SAVE_FRAME_OFFSET), 69 art::Runtime::GetCalleeSaveMethodOffset(art::Runtime::kSaveAll)) 70 71// Offset of field Runtime::callee_save_methods_[kRefsOnly] 72#define RUNTIME_REFS_ONLY_CALLEE_SAVE_FRAME_OFFSET 8 73ADD_TEST_EQ(static_cast<size_t>(RUNTIME_REFS_ONLY_CALLEE_SAVE_FRAME_OFFSET), 74 art::Runtime::GetCalleeSaveMethodOffset(art::Runtime::kRefsOnly)) 75 76// Offset of field Runtime::callee_save_methods_[kRefsAndArgs] 77#define RUNTIME_REFS_AND_ARGS_CALLEE_SAVE_FRAME_OFFSET (2 * 8) 78ADD_TEST_EQ(static_cast<size_t>(RUNTIME_REFS_AND_ARGS_CALLEE_SAVE_FRAME_OFFSET), 79 art::Runtime::GetCalleeSaveMethodOffset(art::Runtime::kRefsAndArgs)) 80 81// Offset of field Thread::tls32_.state_and_flags. 82#define THREAD_FLAGS_OFFSET 0 83ADD_TEST_EQ(THREAD_FLAGS_OFFSET, 84 art::Thread::ThreadFlagsOffset<__SIZEOF_POINTER__>().Int32Value()) 85 86// Offset of field Thread::tls32_.thin_lock_thread_id. 87#define THREAD_ID_OFFSET 12 88ADD_TEST_EQ(THREAD_ID_OFFSET, 89 art::Thread::ThinLockIdOffset<__SIZEOF_POINTER__>().Int32Value()) 90 91// Offset of field Thread::tlsPtr_.card_table. 92#define THREAD_CARD_TABLE_OFFSET 128 93ADD_TEST_EQ(THREAD_CARD_TABLE_OFFSET, 94 art::Thread::CardTableOffset<__SIZEOF_POINTER__>().Int32Value()) 95 96// Offset of field Thread::tlsPtr_.exception. 97#define THREAD_EXCEPTION_OFFSET (THREAD_CARD_TABLE_OFFSET + __SIZEOF_POINTER__) 98ADD_TEST_EQ(THREAD_EXCEPTION_OFFSET, 99 art::Thread::ExceptionOffset<__SIZEOF_POINTER__>().Int32Value()) 100 101// Offset of field Thread::tlsPtr_.managed_stack.top_quick_frame_. 102#define THREAD_TOP_QUICK_FRAME_OFFSET (THREAD_CARD_TABLE_OFFSET + (3 * __SIZEOF_POINTER__)) 103ADD_TEST_EQ(THREAD_TOP_QUICK_FRAME_OFFSET, 104 art::Thread::TopOfManagedStackOffset<__SIZEOF_POINTER__>().Int32Value()) 105 106// Offset of field Thread::tlsPtr_.managed_stack.top_quick_frame_. 107#define THREAD_SELF_OFFSET (THREAD_CARD_TABLE_OFFSET + (9 * __SIZEOF_POINTER__)) 108ADD_TEST_EQ(THREAD_SELF_OFFSET, 109 art::Thread::SelfOffset<__SIZEOF_POINTER__>().Int32Value()) 110 111#define THREAD_LOCAL_POS_OFFSET (THREAD_CARD_TABLE_OFFSET + 147 * __SIZEOF_POINTER__) 112ADD_TEST_EQ(THREAD_LOCAL_POS_OFFSET, 113 art::Thread::ThreadLocalPosOffset<__SIZEOF_POINTER__>().Int32Value()) 114#define THREAD_LOCAL_END_OFFSET (THREAD_LOCAL_POS_OFFSET + __SIZEOF_POINTER__) 115ADD_TEST_EQ(THREAD_LOCAL_END_OFFSET, 116 art::Thread::ThreadLocalEndOffset<__SIZEOF_POINTER__>().Int32Value()) 117#define THREAD_LOCAL_OBJECTS_OFFSET (THREAD_LOCAL_POS_OFFSET + 2 * __SIZEOF_POINTER__) 118ADD_TEST_EQ(THREAD_LOCAL_OBJECTS_OFFSET, 119 art::Thread::ThreadLocalObjectsOffset<__SIZEOF_POINTER__>().Int32Value()) 120 121// Offsets within java.lang.Object. 122#define MIRROR_OBJECT_CLASS_OFFSET 0 123ADD_TEST_EQ(MIRROR_OBJECT_CLASS_OFFSET, art::mirror::Object::ClassOffset().Int32Value()) 124#define MIRROR_OBJECT_LOCK_WORD_OFFSET 4 125ADD_TEST_EQ(MIRROR_OBJECT_LOCK_WORD_OFFSET, art::mirror::Object::MonitorOffset().Int32Value()) 126 127#if defined(USE_BROOKS_READ_BARRIER) 128#define MIRROR_OBJECT_HEADER_SIZE 16 129#else 130#define MIRROR_OBJECT_HEADER_SIZE 8 131#endif 132ADD_TEST_EQ(size_t(MIRROR_OBJECT_HEADER_SIZE), sizeof(art::mirror::Object)) 133 134// Offsets within java.lang.Class. 135#define MIRROR_CLASS_COMPONENT_TYPE_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE) 136ADD_TEST_EQ(MIRROR_CLASS_COMPONENT_TYPE_OFFSET, 137 art::mirror::Class::ComponentTypeOffset().Int32Value()) 138#define MIRROR_CLASS_ACCESS_FLAGS_OFFSET (36 + MIRROR_OBJECT_HEADER_SIZE) 139ADD_TEST_EQ(MIRROR_CLASS_ACCESS_FLAGS_OFFSET, 140 art::mirror::Class::AccessFlagsOffset().Int32Value()) 141#define MIRROR_CLASS_OBJECT_SIZE_OFFSET (112 + MIRROR_OBJECT_HEADER_SIZE) 142ADD_TEST_EQ(MIRROR_CLASS_OBJECT_SIZE_OFFSET, 143 art::mirror::Class::ObjectSizeOffset().Int32Value()) 144#define MIRROR_CLASS_STATUS_OFFSET (124 + MIRROR_OBJECT_HEADER_SIZE) 145ADD_TEST_EQ(MIRROR_CLASS_STATUS_OFFSET, 146 art::mirror::Class::StatusOffset().Int32Value()) 147 148#define MIRROR_CLASS_STATUS_INITIALIZED 10 149ADD_TEST_EQ(static_cast<uint32_t>(MIRROR_CLASS_STATUS_INITIALIZED), 150 static_cast<uint32_t>(art::mirror::Class::kStatusInitialized)) 151#define ACCESS_FLAGS_CLASS_IS_FINALIZABLE 0x80000000 152ADD_TEST_EQ(static_cast<uint32_t>(ACCESS_FLAGS_CLASS_IS_FINALIZABLE), 153 static_cast<uint32_t>(kAccClassIsFinalizable)) 154 155// Array offsets. 156#define MIRROR_ARRAY_LENGTH_OFFSET MIRROR_OBJECT_HEADER_SIZE 157ADD_TEST_EQ(MIRROR_ARRAY_LENGTH_OFFSET, art::mirror::Array::LengthOffset().Int32Value()) 158 159#define MIRROR_CHAR_ARRAY_DATA_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE) 160ADD_TEST_EQ(MIRROR_CHAR_ARRAY_DATA_OFFSET, 161 art::mirror::Array::DataOffset(sizeof(uint16_t)).Int32Value()) 162 163#define MIRROR_OBJECT_ARRAY_DATA_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE) 164ADD_TEST_EQ(MIRROR_OBJECT_ARRAY_DATA_OFFSET, 165 art::mirror::Array::DataOffset( 166 sizeof(art::mirror::HeapReference<art::mirror::Object>)).Int32Value()) 167 168#define MIRROR_OBJECT_ARRAY_COMPONENT_SIZE 4 169ADD_TEST_EQ(static_cast<size_t>(MIRROR_OBJECT_ARRAY_COMPONENT_SIZE), 170 sizeof(art::mirror::HeapReference<art::mirror::Object>)) 171 172#define MIRROR_LONG_ARRAY_DATA_OFFSET (8 + MIRROR_OBJECT_HEADER_SIZE) 173ADD_TEST_EQ(MIRROR_LONG_ARRAY_DATA_OFFSET, 174 art::mirror::Array::DataOffset(sizeof(uint64_t)).Int32Value()) 175 176// Offsets within java.lang.String. 177#define MIRROR_STRING_COUNT_OFFSET MIRROR_OBJECT_HEADER_SIZE 178ADD_TEST_EQ(MIRROR_STRING_COUNT_OFFSET, art::mirror::String::CountOffset().Int32Value()) 179 180#define MIRROR_STRING_VALUE_OFFSET (8 + MIRROR_OBJECT_HEADER_SIZE) 181ADD_TEST_EQ(MIRROR_STRING_VALUE_OFFSET, art::mirror::String::ValueOffset().Int32Value()) 182 183// Offsets within java.lang.reflect.ArtMethod. 184#define ART_METHOD_DEX_CACHE_METHODS_OFFSET 4 185ADD_TEST_EQ(ART_METHOD_DEX_CACHE_METHODS_OFFSET, 186 art::ArtMethod::DexCacheResolvedMethodsOffset().Int32Value()) 187 188#define ART_METHOD_DEX_CACHE_TYPES_OFFSET 8 189ADD_TEST_EQ(ART_METHOD_DEX_CACHE_TYPES_OFFSET, 190 art::ArtMethod::DexCacheResolvedTypesOffset().Int32Value()) 191 192#define ART_METHOD_QUICK_CODE_OFFSET_32 36 193ADD_TEST_EQ(ART_METHOD_QUICK_CODE_OFFSET_32, 194 art::ArtMethod::EntryPointFromQuickCompiledCodeOffset(4).Int32Value()) 195 196#define ART_METHOD_QUICK_CODE_OFFSET_64 48 197ADD_TEST_EQ(ART_METHOD_QUICK_CODE_OFFSET_64, 198 art::ArtMethod::EntryPointFromQuickCompiledCodeOffset(8).Int32Value()) 199 200#define LOCK_WORD_STATE_SHIFT 30 201ADD_TEST_EQ(LOCK_WORD_STATE_SHIFT, static_cast<int32_t>(art::LockWord::kStateShift)) 202 203#define LOCK_WORD_STATE_MASK 0xC0000000 204ADD_TEST_EQ(LOCK_WORD_STATE_MASK, static_cast<uint32_t>(art::LockWord::kStateMaskShifted)) 205 206#define LOCK_WORD_READ_BARRIER_STATE_SHIFT 28 207ADD_TEST_EQ(LOCK_WORD_READ_BARRIER_STATE_SHIFT, 208 static_cast<int32_t>(art::LockWord::kReadBarrierStateShift)) 209 210#define LOCK_WORD_READ_BARRIER_STATE_MASK 0x30000000 211ADD_TEST_EQ(LOCK_WORD_READ_BARRIER_STATE_MASK, 212 static_cast<int32_t>(art::LockWord::kReadBarrierStateMaskShifted)) 213 214#define LOCK_WORD_READ_BARRIER_STATE_MASK_TOGGLED 0xCFFFFFFF 215ADD_TEST_EQ(LOCK_WORD_READ_BARRIER_STATE_MASK_TOGGLED, 216 static_cast<uint32_t>(art::LockWord::kReadBarrierStateMaskShiftedToggled)) 217 218#define LOCK_WORD_THIN_LOCK_COUNT_ONE 65536 219ADD_TEST_EQ(LOCK_WORD_THIN_LOCK_COUNT_ONE, static_cast<int32_t>(art::LockWord::kThinLockCountOne)) 220 221#define OBJECT_ALIGNMENT_MASK 7 222ADD_TEST_EQ(static_cast<size_t>(OBJECT_ALIGNMENT_MASK), art::kObjectAlignment - 1) 223 224#define OBJECT_ALIGNMENT_MASK_TOGGLED 0xFFFFFFF8 225ADD_TEST_EQ(static_cast<uint32_t>(OBJECT_ALIGNMENT_MASK_TOGGLED), 226 ~static_cast<uint32_t>(art::kObjectAlignment - 1)) 227 228#if defined(__cplusplus) 229} // End of CheckAsmSupportOffsets. 230#endif 231 232#endif // ART_RUNTIME_ASM_SUPPORT_H_ 233