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 "base/bit_utils.h" 23 #include "gc/allocator/rosalloc.h" 24 #include "gc/heap.h" 25 #include "jit/jit.h" 26 #include "lock_word.h" 27 #include "mirror/class.h" 28 #include "mirror/dex_cache.h" 29 #include "mirror/string.h" 30 #include "utils/dex_cache_arrays_layout.h" 31 #include "runtime.h" 32 #include "thread.h" 33 #endif 34 35 #include "read_barrier_c.h" 36 37 #if defined(__arm__) || defined(__mips__) 38 // In quick code for ARM and MIPS we make poor use of registers and perform frequent suspend 39 // checks in the event of loop back edges. The SUSPEND_CHECK_INTERVAL constant is loaded into a 40 // register at the point of an up-call or after handling a suspend check. It reduces the number of 41 // loads of the TLS suspend check value by the given amount (turning it into a decrement and compare 42 // of a register). This increases the time for a thread to respond to requests from GC and the 43 // debugger, damaging GC performance and creating other unwanted artifacts. For example, this count 44 // has the effect of making loops and Java code look cold in profilers, where the count is reset 45 // impacts where samples will occur. Reducing the count as much as possible improves profiler 46 // accuracy in tools like traceview. 47 // TODO: get a compiler that can do a proper job of loop optimization and remove this. 48 #define SUSPEND_CHECK_INTERVAL 96 49 #endif 50 51 #if defined(__cplusplus) 52 53 #ifndef ADD_TEST_EQ // Allow #include-r to replace with their own. 54 #define ADD_TEST_EQ(x, y) CHECK_EQ(x, y); 55 #endif 56 57 static inline void CheckAsmSupportOffsetsAndSizes() { 58 #else 59 #define ADD_TEST_EQ(x, y) 60 #endif 61 62 #if defined(__LP64__) 63 #define POINTER_SIZE_SHIFT 3 64 #define POINTER_SIZE art::PointerSize::k64 65 #else 66 #define POINTER_SIZE_SHIFT 2 67 #define POINTER_SIZE art::PointerSize::k32 68 #endif 69 ADD_TEST_EQ(static_cast<size_t>(1U << POINTER_SIZE_SHIFT), 70 static_cast<size_t>(__SIZEOF_POINTER__)) 71 72 // Import platform-independent constant defines from our autogenerated list. 73 // Export new defines (for assembly use) by editing cpp-define-generator def files. 74 #define DEFINE_CHECK_EQ ADD_TEST_EQ 75 #include "asm_support_gen.h" 76 77 // Offset of field Thread::tlsPtr_.exception. 78 #define THREAD_EXCEPTION_OFFSET (THREAD_CARD_TABLE_OFFSET + __SIZEOF_POINTER__) 79 ADD_TEST_EQ(THREAD_EXCEPTION_OFFSET, 80 art::Thread::ExceptionOffset<POINTER_SIZE>().Int32Value()) 81 82 // Offset of field Thread::tlsPtr_.managed_stack.top_quick_frame_. 83 #define THREAD_TOP_QUICK_FRAME_OFFSET (THREAD_CARD_TABLE_OFFSET + (3 * __SIZEOF_POINTER__)) 84 ADD_TEST_EQ(THREAD_TOP_QUICK_FRAME_OFFSET, 85 art::Thread::TopOfManagedStackOffset<POINTER_SIZE>().Int32Value()) 86 87 // Offset of field Thread::tlsPtr_.self. 88 #define THREAD_SELF_OFFSET (THREAD_CARD_TABLE_OFFSET + (9 * __SIZEOF_POINTER__)) 89 ADD_TEST_EQ(THREAD_SELF_OFFSET, 90 art::Thread::SelfOffset<POINTER_SIZE>().Int32Value()) 91 92 // Offset of field Thread::tlsPtr_.thread_local_pos. 93 #define THREAD_LOCAL_POS_OFFSET (THREAD_CARD_TABLE_OFFSET + 34 * __SIZEOF_POINTER__) 94 ADD_TEST_EQ(THREAD_LOCAL_POS_OFFSET, 95 art::Thread::ThreadLocalPosOffset<POINTER_SIZE>().Int32Value()) 96 // Offset of field Thread::tlsPtr_.thread_local_end. 97 #define THREAD_LOCAL_END_OFFSET (THREAD_LOCAL_POS_OFFSET + __SIZEOF_POINTER__) 98 ADD_TEST_EQ(THREAD_LOCAL_END_OFFSET, 99 art::Thread::ThreadLocalEndOffset<POINTER_SIZE>().Int32Value()) 100 // Offset of field Thread::tlsPtr_.thread_local_objects. 101 #define THREAD_LOCAL_OBJECTS_OFFSET (THREAD_LOCAL_END_OFFSET + 2 * __SIZEOF_POINTER__) 102 ADD_TEST_EQ(THREAD_LOCAL_OBJECTS_OFFSET, 103 art::Thread::ThreadLocalObjectsOffset<POINTER_SIZE>().Int32Value()) 104 105 // Offset of field Thread::tlsPtr_.mterp_current_ibase. 106 #define THREAD_CURRENT_IBASE_OFFSET \ 107 (THREAD_LOCAL_OBJECTS_OFFSET + __SIZEOF_SIZE_T__ + (1 + 161) * __SIZEOF_POINTER__) 108 ADD_TEST_EQ(THREAD_CURRENT_IBASE_OFFSET, 109 art::Thread::MterpCurrentIBaseOffset<POINTER_SIZE>().Int32Value()) 110 // Offset of field Thread::tlsPtr_.mterp_default_ibase. 111 #define THREAD_DEFAULT_IBASE_OFFSET (THREAD_CURRENT_IBASE_OFFSET + __SIZEOF_POINTER__) 112 ADD_TEST_EQ(THREAD_DEFAULT_IBASE_OFFSET, 113 art::Thread::MterpDefaultIBaseOffset<POINTER_SIZE>().Int32Value()) 114 // Offset of field Thread::tlsPtr_.mterp_alt_ibase. 115 #define THREAD_ALT_IBASE_OFFSET (THREAD_DEFAULT_IBASE_OFFSET + __SIZEOF_POINTER__) 116 ADD_TEST_EQ(THREAD_ALT_IBASE_OFFSET, 117 art::Thread::MterpAltIBaseOffset<POINTER_SIZE>().Int32Value()) 118 // Offset of field Thread::tlsPtr_.rosalloc_runs. 119 #define THREAD_ROSALLOC_RUNS_OFFSET (THREAD_ALT_IBASE_OFFSET + __SIZEOF_POINTER__) 120 ADD_TEST_EQ(THREAD_ROSALLOC_RUNS_OFFSET, 121 art::Thread::RosAllocRunsOffset<POINTER_SIZE>().Int32Value()) 122 // Offset of field Thread::tlsPtr_.thread_local_alloc_stack_top. 123 #define THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET (THREAD_ROSALLOC_RUNS_OFFSET + 16 * __SIZEOF_POINTER__) 124 ADD_TEST_EQ(THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET, 125 art::Thread::ThreadLocalAllocStackTopOffset<POINTER_SIZE>().Int32Value()) 126 // Offset of field Thread::tlsPtr_.thread_local_alloc_stack_end. 127 #define THREAD_LOCAL_ALLOC_STACK_END_OFFSET (THREAD_ROSALLOC_RUNS_OFFSET + 17 * __SIZEOF_POINTER__) 128 ADD_TEST_EQ(THREAD_LOCAL_ALLOC_STACK_END_OFFSET, 129 art::Thread::ThreadLocalAllocStackEndOffset<POINTER_SIZE>().Int32Value()) 130 131 // Offsets within ShadowFrame. 132 #define SHADOWFRAME_LINK_OFFSET 0 133 ADD_TEST_EQ(SHADOWFRAME_LINK_OFFSET, 134 static_cast<int32_t>(art::ShadowFrame::LinkOffset())) 135 #define SHADOWFRAME_METHOD_OFFSET (SHADOWFRAME_LINK_OFFSET + 1 * __SIZEOF_POINTER__) 136 ADD_TEST_EQ(SHADOWFRAME_METHOD_OFFSET, 137 static_cast<int32_t>(art::ShadowFrame::MethodOffset())) 138 #define SHADOWFRAME_RESULT_REGISTER_OFFSET (SHADOWFRAME_LINK_OFFSET + 2 * __SIZEOF_POINTER__) 139 ADD_TEST_EQ(SHADOWFRAME_RESULT_REGISTER_OFFSET, 140 static_cast<int32_t>(art::ShadowFrame::ResultRegisterOffset())) 141 #define SHADOWFRAME_DEX_PC_PTR_OFFSET (SHADOWFRAME_LINK_OFFSET + 3 * __SIZEOF_POINTER__) 142 ADD_TEST_EQ(SHADOWFRAME_DEX_PC_PTR_OFFSET, 143 static_cast<int32_t>(art::ShadowFrame::DexPCPtrOffset())) 144 #define SHADOWFRAME_CODE_ITEM_OFFSET (SHADOWFRAME_LINK_OFFSET + 4 * __SIZEOF_POINTER__) 145 ADD_TEST_EQ(SHADOWFRAME_CODE_ITEM_OFFSET, 146 static_cast<int32_t>(art::ShadowFrame::CodeItemOffset())) 147 #define SHADOWFRAME_LOCK_COUNT_DATA_OFFSET (SHADOWFRAME_LINK_OFFSET + 5 * __SIZEOF_POINTER__) 148 ADD_TEST_EQ(SHADOWFRAME_LOCK_COUNT_DATA_OFFSET, 149 static_cast<int32_t>(art::ShadowFrame::LockCountDataOffset())) 150 #define SHADOWFRAME_NUMBER_OF_VREGS_OFFSET (SHADOWFRAME_LINK_OFFSET + 6 * __SIZEOF_POINTER__) 151 ADD_TEST_EQ(SHADOWFRAME_NUMBER_OF_VREGS_OFFSET, 152 static_cast<int32_t>(art::ShadowFrame::NumberOfVRegsOffset())) 153 #define SHADOWFRAME_DEX_PC_OFFSET (SHADOWFRAME_NUMBER_OF_VREGS_OFFSET + 4) 154 ADD_TEST_EQ(SHADOWFRAME_DEX_PC_OFFSET, 155 static_cast<int32_t>(art::ShadowFrame::DexPCOffset())) 156 #define SHADOWFRAME_CACHED_HOTNESS_COUNTDOWN_OFFSET (SHADOWFRAME_NUMBER_OF_VREGS_OFFSET + 8) 157 ADD_TEST_EQ(SHADOWFRAME_CACHED_HOTNESS_COUNTDOWN_OFFSET, 158 static_cast<int32_t>(art::ShadowFrame::CachedHotnessCountdownOffset())) 159 #define SHADOWFRAME_HOTNESS_COUNTDOWN_OFFSET (SHADOWFRAME_NUMBER_OF_VREGS_OFFSET + 10) 160 ADD_TEST_EQ(SHADOWFRAME_HOTNESS_COUNTDOWN_OFFSET, 161 static_cast<int32_t>(art::ShadowFrame::HotnessCountdownOffset())) 162 #define SHADOWFRAME_VREGS_OFFSET (SHADOWFRAME_NUMBER_OF_VREGS_OFFSET + 12) 163 ADD_TEST_EQ(SHADOWFRAME_VREGS_OFFSET, 164 static_cast<int32_t>(art::ShadowFrame::VRegsOffset())) 165 166 #if defined(USE_BROOKS_READ_BARRIER) 167 #define MIRROR_OBJECT_HEADER_SIZE 16 168 #else 169 #define MIRROR_OBJECT_HEADER_SIZE 8 170 #endif 171 ADD_TEST_EQ(size_t(MIRROR_OBJECT_HEADER_SIZE), sizeof(art::mirror::Object)) 172 173 // Offsets within java.lang.Class. 174 #define MIRROR_CLASS_COMPONENT_TYPE_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE) 175 ADD_TEST_EQ(MIRROR_CLASS_COMPONENT_TYPE_OFFSET, 176 art::mirror::Class::ComponentTypeOffset().Int32Value()) 177 #define MIRROR_CLASS_IF_TABLE_OFFSET (16 + MIRROR_OBJECT_HEADER_SIZE) 178 ADD_TEST_EQ(MIRROR_CLASS_IF_TABLE_OFFSET, 179 art::mirror::Class::IfTableOffset().Int32Value()) 180 #define MIRROR_CLASS_ACCESS_FLAGS_OFFSET (56 + MIRROR_OBJECT_HEADER_SIZE) 181 ADD_TEST_EQ(MIRROR_CLASS_ACCESS_FLAGS_OFFSET, 182 art::mirror::Class::AccessFlagsOffset().Int32Value()) 183 #define MIRROR_CLASS_OBJECT_SIZE_OFFSET (88 + MIRROR_OBJECT_HEADER_SIZE) 184 ADD_TEST_EQ(MIRROR_CLASS_OBJECT_SIZE_OFFSET, 185 art::mirror::Class::ObjectSizeOffset().Int32Value()) 186 #define MIRROR_CLASS_OBJECT_SIZE_ALLOC_FAST_PATH_OFFSET (92 + MIRROR_OBJECT_HEADER_SIZE) 187 ADD_TEST_EQ(MIRROR_CLASS_OBJECT_SIZE_ALLOC_FAST_PATH_OFFSET, 188 art::mirror::Class::ObjectSizeAllocFastPathOffset().Int32Value()) 189 #define MIRROR_CLASS_OBJECT_PRIMITIVE_TYPE_OFFSET (96 + MIRROR_OBJECT_HEADER_SIZE) 190 ADD_TEST_EQ(MIRROR_CLASS_OBJECT_PRIMITIVE_TYPE_OFFSET, 191 art::mirror::Class::PrimitiveTypeOffset().Int32Value()) 192 #define MIRROR_CLASS_STATUS_OFFSET (104 + MIRROR_OBJECT_HEADER_SIZE) 193 ADD_TEST_EQ(MIRROR_CLASS_STATUS_OFFSET, 194 art::mirror::Class::StatusOffset().Int32Value()) 195 196 #define PRIMITIVE_TYPE_SIZE_SHIFT_SHIFT 16 197 ADD_TEST_EQ(PRIMITIVE_TYPE_SIZE_SHIFT_SHIFT, 198 static_cast<int>(art::mirror::Class::kPrimitiveTypeSizeShiftShift)) 199 200 // Array offsets. 201 #define MIRROR_ARRAY_LENGTH_OFFSET MIRROR_OBJECT_HEADER_SIZE 202 ADD_TEST_EQ(MIRROR_ARRAY_LENGTH_OFFSET, art::mirror::Array::LengthOffset().Int32Value()) 203 204 #define MIRROR_CHAR_ARRAY_DATA_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE) 205 ADD_TEST_EQ(MIRROR_CHAR_ARRAY_DATA_OFFSET, 206 art::mirror::Array::DataOffset(sizeof(uint16_t)).Int32Value()) 207 208 #define MIRROR_BOOLEAN_ARRAY_DATA_OFFSET MIRROR_CHAR_ARRAY_DATA_OFFSET 209 ADD_TEST_EQ(MIRROR_BOOLEAN_ARRAY_DATA_OFFSET, 210 art::mirror::Array::DataOffset(sizeof(uint8_t)).Int32Value()) 211 212 #define MIRROR_BYTE_ARRAY_DATA_OFFSET MIRROR_CHAR_ARRAY_DATA_OFFSET 213 ADD_TEST_EQ(MIRROR_BYTE_ARRAY_DATA_OFFSET, 214 art::mirror::Array::DataOffset(sizeof(int8_t)).Int32Value()) 215 216 #define MIRROR_SHORT_ARRAY_DATA_OFFSET MIRROR_CHAR_ARRAY_DATA_OFFSET 217 ADD_TEST_EQ(MIRROR_SHORT_ARRAY_DATA_OFFSET, 218 art::mirror::Array::DataOffset(sizeof(int16_t)).Int32Value()) 219 220 #define MIRROR_INT_ARRAY_DATA_OFFSET MIRROR_CHAR_ARRAY_DATA_OFFSET 221 ADD_TEST_EQ(MIRROR_INT_ARRAY_DATA_OFFSET, 222 art::mirror::Array::DataOffset(sizeof(int32_t)).Int32Value()) 223 224 #define MIRROR_WIDE_ARRAY_DATA_OFFSET (8 + MIRROR_OBJECT_HEADER_SIZE) 225 ADD_TEST_EQ(MIRROR_WIDE_ARRAY_DATA_OFFSET, 226 art::mirror::Array::DataOffset(sizeof(uint64_t)).Int32Value()) 227 228 #define MIRROR_OBJECT_ARRAY_DATA_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE) 229 ADD_TEST_EQ(MIRROR_OBJECT_ARRAY_DATA_OFFSET, 230 art::mirror::Array::DataOffset( 231 sizeof(art::mirror::HeapReference<art::mirror::Object>)).Int32Value()) 232 233 #define MIRROR_OBJECT_ARRAY_COMPONENT_SIZE 4 234 ADD_TEST_EQ(static_cast<size_t>(MIRROR_OBJECT_ARRAY_COMPONENT_SIZE), 235 sizeof(art::mirror::HeapReference<art::mirror::Object>)) 236 237 #define MIRROR_LONG_ARRAY_DATA_OFFSET (8 + MIRROR_OBJECT_HEADER_SIZE) 238 ADD_TEST_EQ(MIRROR_LONG_ARRAY_DATA_OFFSET, 239 art::mirror::Array::DataOffset(sizeof(uint64_t)).Int32Value()) 240 241 // Offsets within java.lang.String. 242 #define MIRROR_STRING_COUNT_OFFSET MIRROR_OBJECT_HEADER_SIZE 243 ADD_TEST_EQ(MIRROR_STRING_COUNT_OFFSET, art::mirror::String::CountOffset().Int32Value()) 244 245 #define MIRROR_STRING_VALUE_OFFSET (8 + MIRROR_OBJECT_HEADER_SIZE) 246 ADD_TEST_EQ(MIRROR_STRING_VALUE_OFFSET, art::mirror::String::ValueOffset().Int32Value()) 247 248 // String compression feature. 249 #define STRING_COMPRESSION_FEATURE 1 250 ADD_TEST_EQ(STRING_COMPRESSION_FEATURE, art::mirror::kUseStringCompression); 251 252 #if defined(__cplusplus) 253 } // End of CheckAsmSupportOffsets. 254 #endif 255 256 #endif // ART_RUNTIME_ASM_SUPPORT_H_ 257
