Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | #include "var_handle.h" |
| 18 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 19 | #include "array-inl.h" |
| 20 | #include "art_field-inl.h" |
Vladimir Marko | 78baed5 | 2018-10-11 10:44:58 +0100 | [diff] [blame] | 21 | #include "base/casts.h" |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 22 | #include "class-inl.h" |
| 23 | #include "class_linker.h" |
Vladimir Marko | c7aa87e | 2018-05-24 15:19:52 +0100 | [diff] [blame] | 24 | #include "class_root.h" |
Orion Hodson | b8b9387 | 2018-01-30 07:51:10 +0000 | [diff] [blame] | 25 | #include "intrinsics_enum.h" |
Vladimir Marko | a3ad0cd | 2018-05-04 10:06:38 +0100 | [diff] [blame] | 26 | #include "jni/jni_internal.h" |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 27 | #include "jvalue-inl.h" |
Vladimir Marko | 6ec2a1b | 2018-05-22 15:33:48 +0100 | [diff] [blame] | 28 | #include "method_handles-inl.h" |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 29 | #include "method_type.h" |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 30 | #include "obj_ptr-inl.h" |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 31 | #include "well_known_classes.h" |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 32 | |
| 33 | namespace art { |
| 34 | namespace mirror { |
| 35 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 36 | static constexpr bool kTransactionActive = true; |
| 37 | static constexpr bool kTransactionInactive = !kTransactionActive; |
| 38 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 39 | namespace { |
| 40 | |
Orion Hodson | fe92d12 | 2018-01-02 10:45:17 +0000 | [diff] [blame] | 41 | struct VarHandleAccessorToAccessModeEntry { |
| 42 | const char* method_name; |
| 43 | VarHandle::AccessMode access_mode; |
| 44 | |
| 45 | // Binary predicate function for finding access_mode by |
| 46 | // method_name. The access_mode field is ignored. |
| 47 | static bool CompareName(const VarHandleAccessorToAccessModeEntry& lhs, |
| 48 | const VarHandleAccessorToAccessModeEntry& rhs) { |
| 49 | return strcmp(lhs.method_name, rhs.method_name) < 0; |
| 50 | } |
| 51 | }; |
| 52 | |
| 53 | // Map of VarHandle accessor method names to access mode values. The list is alpha-sorted to support |
| 54 | // binary search. For the usage scenario - lookups in the verifier - a linear scan would likely |
| 55 | // suffice since we expect VarHandles to be a lesser encountered class. We could use a std::hashmap |
| 56 | // here and this would be easier to maintain if new values are added here. However, this entails |
| 57 | // CPU cycles initializing the structure on every execution and uses O(N) more memory for |
| 58 | // intermediate nodes and makes that memory dirty. Compile-time magic using constexpr is possible |
| 59 | // here, but that's a tax when this code is recompiled. |
| 60 | const VarHandleAccessorToAccessModeEntry kAccessorToAccessMode[VarHandle::kNumberOfAccessModes] = { |
| 61 | { "compareAndExchange", VarHandle::AccessMode::kCompareAndExchange }, |
| 62 | { "compareAndExchangeAcquire", VarHandle::AccessMode::kCompareAndExchangeAcquire }, |
| 63 | { "compareAndExchangeRelease", VarHandle::AccessMode::kCompareAndExchangeRelease }, |
| 64 | { "compareAndSet", VarHandle::AccessMode::kCompareAndSet }, |
| 65 | { "get", VarHandle::AccessMode::kGet }, |
| 66 | { "getAcquire", VarHandle::AccessMode::kGetAcquire }, |
| 67 | { "getAndAdd", VarHandle::AccessMode::kGetAndAdd }, |
| 68 | { "getAndAddAcquire", VarHandle::AccessMode::kGetAndAddAcquire }, |
| 69 | { "getAndAddRelease", VarHandle::AccessMode::kGetAndAddRelease }, |
| 70 | { "getAndBitwiseAnd", VarHandle::AccessMode::kGetAndBitwiseAnd }, |
| 71 | { "getAndBitwiseAndAcquire", VarHandle::AccessMode::kGetAndBitwiseAndAcquire }, |
| 72 | { "getAndBitwiseAndRelease", VarHandle::AccessMode::kGetAndBitwiseAndRelease }, |
| 73 | { "getAndBitwiseOr", VarHandle::AccessMode::kGetAndBitwiseOr }, |
| 74 | { "getAndBitwiseOrAcquire", VarHandle::AccessMode::kGetAndBitwiseOrAcquire }, |
| 75 | { "getAndBitwiseOrRelease", VarHandle::AccessMode::kGetAndBitwiseOrRelease }, |
| 76 | { "getAndBitwiseXor", VarHandle::AccessMode::kGetAndBitwiseXor }, |
| 77 | { "getAndBitwiseXorAcquire", VarHandle::AccessMode::kGetAndBitwiseXorAcquire }, |
| 78 | { "getAndBitwiseXorRelease", VarHandle::AccessMode::kGetAndBitwiseXorRelease }, |
| 79 | { "getAndSet", VarHandle::AccessMode::kGetAndSet }, |
| 80 | { "getAndSetAcquire", VarHandle::AccessMode::kGetAndSetAcquire }, |
| 81 | { "getAndSetRelease", VarHandle::AccessMode::kGetAndSetRelease }, |
| 82 | { "getOpaque", VarHandle::AccessMode::kGetOpaque }, |
| 83 | { "getVolatile", VarHandle::AccessMode::kGetVolatile }, |
| 84 | { "set", VarHandle::AccessMode::kSet }, |
| 85 | { "setOpaque", VarHandle::AccessMode::kSetOpaque }, |
| 86 | { "setRelease", VarHandle::AccessMode::kSetRelease }, |
| 87 | { "setVolatile", VarHandle::AccessMode::kSetVolatile }, |
| 88 | { "weakCompareAndSet", VarHandle::AccessMode::kWeakCompareAndSet }, |
| 89 | { "weakCompareAndSetAcquire", VarHandle::AccessMode::kWeakCompareAndSetAcquire }, |
| 90 | { "weakCompareAndSetPlain", VarHandle::AccessMode::kWeakCompareAndSetPlain }, |
| 91 | { "weakCompareAndSetRelease", VarHandle::AccessMode::kWeakCompareAndSetRelease }, |
| 92 | }; |
| 93 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 94 | // Enumeration for describing the parameter and return types of an AccessMode. |
| 95 | enum class AccessModeTemplate : uint32_t { |
| 96 | kGet, // T Op(C0..CN) |
| 97 | kSet, // void Op(C0..CN, T) |
| 98 | kCompareAndSet, // boolean Op(C0..CN, T, T) |
| 99 | kCompareAndExchange, // T Op(C0..CN, T, T) |
| 100 | kGetAndUpdate, // T Op(C0..CN, T) |
| 101 | }; |
| 102 | |
| 103 | // Look up the AccessModeTemplate for a given VarHandle |
| 104 | // AccessMode. This simplifies finding the correct signature for a |
| 105 | // VarHandle accessor method. |
| 106 | AccessModeTemplate GetAccessModeTemplate(VarHandle::AccessMode access_mode) { |
| 107 | switch (access_mode) { |
| 108 | case VarHandle::AccessMode::kGet: |
| 109 | return AccessModeTemplate::kGet; |
| 110 | case VarHandle::AccessMode::kSet: |
| 111 | return AccessModeTemplate::kSet; |
| 112 | case VarHandle::AccessMode::kGetVolatile: |
| 113 | return AccessModeTemplate::kGet; |
| 114 | case VarHandle::AccessMode::kSetVolatile: |
| 115 | return AccessModeTemplate::kSet; |
| 116 | case VarHandle::AccessMode::kGetAcquire: |
| 117 | return AccessModeTemplate::kGet; |
| 118 | case VarHandle::AccessMode::kSetRelease: |
| 119 | return AccessModeTemplate::kSet; |
| 120 | case VarHandle::AccessMode::kGetOpaque: |
| 121 | return AccessModeTemplate::kGet; |
| 122 | case VarHandle::AccessMode::kSetOpaque: |
| 123 | return AccessModeTemplate::kSet; |
| 124 | case VarHandle::AccessMode::kCompareAndSet: |
| 125 | return AccessModeTemplate::kCompareAndSet; |
| 126 | case VarHandle::AccessMode::kCompareAndExchange: |
| 127 | return AccessModeTemplate::kCompareAndExchange; |
| 128 | case VarHandle::AccessMode::kCompareAndExchangeAcquire: |
| 129 | return AccessModeTemplate::kCompareAndExchange; |
| 130 | case VarHandle::AccessMode::kCompareAndExchangeRelease: |
| 131 | return AccessModeTemplate::kCompareAndExchange; |
| 132 | case VarHandle::AccessMode::kWeakCompareAndSetPlain: |
| 133 | return AccessModeTemplate::kCompareAndSet; |
| 134 | case VarHandle::AccessMode::kWeakCompareAndSet: |
| 135 | return AccessModeTemplate::kCompareAndSet; |
| 136 | case VarHandle::AccessMode::kWeakCompareAndSetAcquire: |
| 137 | return AccessModeTemplate::kCompareAndSet; |
| 138 | case VarHandle::AccessMode::kWeakCompareAndSetRelease: |
| 139 | return AccessModeTemplate::kCompareAndSet; |
| 140 | case VarHandle::AccessMode::kGetAndSet: |
| 141 | return AccessModeTemplate::kGetAndUpdate; |
| 142 | case VarHandle::AccessMode::kGetAndSetAcquire: |
| 143 | return AccessModeTemplate::kGetAndUpdate; |
| 144 | case VarHandle::AccessMode::kGetAndSetRelease: |
| 145 | return AccessModeTemplate::kGetAndUpdate; |
| 146 | case VarHandle::AccessMode::kGetAndAdd: |
| 147 | return AccessModeTemplate::kGetAndUpdate; |
| 148 | case VarHandle::AccessMode::kGetAndAddAcquire: |
| 149 | return AccessModeTemplate::kGetAndUpdate; |
| 150 | case VarHandle::AccessMode::kGetAndAddRelease: |
| 151 | return AccessModeTemplate::kGetAndUpdate; |
| 152 | case VarHandle::AccessMode::kGetAndBitwiseOr: |
| 153 | return AccessModeTemplate::kGetAndUpdate; |
| 154 | case VarHandle::AccessMode::kGetAndBitwiseOrRelease: |
| 155 | return AccessModeTemplate::kGetAndUpdate; |
| 156 | case VarHandle::AccessMode::kGetAndBitwiseOrAcquire: |
| 157 | return AccessModeTemplate::kGetAndUpdate; |
| 158 | case VarHandle::AccessMode::kGetAndBitwiseAnd: |
| 159 | return AccessModeTemplate::kGetAndUpdate; |
| 160 | case VarHandle::AccessMode::kGetAndBitwiseAndRelease: |
| 161 | return AccessModeTemplate::kGetAndUpdate; |
| 162 | case VarHandle::AccessMode::kGetAndBitwiseAndAcquire: |
| 163 | return AccessModeTemplate::kGetAndUpdate; |
| 164 | case VarHandle::AccessMode::kGetAndBitwiseXor: |
| 165 | return AccessModeTemplate::kGetAndUpdate; |
| 166 | case VarHandle::AccessMode::kGetAndBitwiseXorRelease: |
| 167 | return AccessModeTemplate::kGetAndUpdate; |
| 168 | case VarHandle::AccessMode::kGetAndBitwiseXorAcquire: |
| 169 | return AccessModeTemplate::kGetAndUpdate; |
| 170 | } |
| 171 | } |
| 172 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 173 | int32_t GetNumberOfVarTypeParameters(AccessModeTemplate access_mode_template) { |
Orion Hodson | c4d3bf4 | 2018-02-06 16:02:49 +0000 | [diff] [blame] | 174 | switch (access_mode_template) { |
| 175 | case AccessModeTemplate::kGet: |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 176 | return 0; |
Orion Hodson | c4d3bf4 | 2018-02-06 16:02:49 +0000 | [diff] [blame] | 177 | case AccessModeTemplate::kSet: |
| 178 | case AccessModeTemplate::kGetAndUpdate: |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 179 | return 1; |
Orion Hodson | c4d3bf4 | 2018-02-06 16:02:49 +0000 | [diff] [blame] | 180 | case AccessModeTemplate::kCompareAndSet: |
| 181 | case AccessModeTemplate::kCompareAndExchange: |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 182 | return 2; |
Orion Hodson | becc83b | 2017-12-08 11:36:19 +0000 | [diff] [blame] | 183 | } |
Orion Hodson | c4d3bf4 | 2018-02-06 16:02:49 +0000 | [diff] [blame] | 184 | UNREACHABLE(); |
Orion Hodson | becc83b | 2017-12-08 11:36:19 +0000 | [diff] [blame] | 185 | } |
| 186 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 187 | // Returns the number of parameters associated with an |
| 188 | // AccessModeTemplate and the supplied coordinate types. |
| 189 | int32_t GetNumberOfParameters(AccessModeTemplate access_mode_template, |
| 190 | ObjPtr<Class> coordinateType0, |
| 191 | ObjPtr<Class> coordinateType1) { |
| 192 | int32_t count = 0; |
| 193 | if (!coordinateType0.IsNull()) { |
| 194 | count++; |
| 195 | if (!coordinateType1.IsNull()) { |
| 196 | count++; |
| 197 | } |
| 198 | } |
| 199 | return count + GetNumberOfVarTypeParameters(access_mode_template); |
| 200 | } |
| 201 | |
| 202 | void ThrowNullPointerExceptionForCoordinate() REQUIRES_SHARED(Locks::mutator_lock_) { |
| 203 | ThrowNullPointerException("Attempt to access memory on a null object"); |
| 204 | } |
| 205 | |
| 206 | bool CheckElementIndex(Primitive::Type type, |
| 207 | int32_t relative_index, |
| 208 | int32_t start, |
| 209 | int32_t limit) REQUIRES_SHARED(Locks::mutator_lock_) { |
| 210 | int64_t index = start + relative_index; |
| 211 | int64_t max_index = limit - Primitive::ComponentSize(type); |
| 212 | if (index < start || index > max_index) { |
| 213 | ThrowIndexOutOfBoundsException(index, limit - start); |
| 214 | return false; |
| 215 | } |
| 216 | return true; |
| 217 | } |
| 218 | |
| 219 | bool CheckElementIndex(Primitive::Type type, int32_t index, int32_t range_limit) |
| 220 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 221 | return CheckElementIndex(type, index, 0, range_limit); |
| 222 | } |
| 223 | |
| 224 | // Returns true if access_mode only entails a memory read. False if |
| 225 | // access_mode may write to memory. |
| 226 | bool IsReadOnlyAccessMode(VarHandle::AccessMode access_mode) { |
| 227 | AccessModeTemplate access_mode_template = GetAccessModeTemplate(access_mode); |
| 228 | return access_mode_template == AccessModeTemplate::kGet; |
| 229 | } |
| 230 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 231 | // Writes the parameter types associated with the AccessModeTemplate |
| 232 | // into an array. The parameter types are derived from the specified |
| 233 | // variable type and coordinate types. Returns the number of |
| 234 | // parameters written. |
| 235 | int32_t BuildParameterArray(ObjPtr<Class> (¶meters)[VarHandle::kMaxAccessorParameters], |
| 236 | AccessModeTemplate access_mode_template, |
| 237 | ObjPtr<Class> varType, |
| 238 | ObjPtr<Class> coordinateType0, |
| 239 | ObjPtr<Class> coordinateType1) |
| 240 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 241 | DCHECK(varType != nullptr); |
| 242 | int32_t index = 0; |
| 243 | if (!coordinateType0.IsNull()) { |
| 244 | parameters[index++] = coordinateType0; |
| 245 | if (!coordinateType1.IsNull()) { |
| 246 | parameters[index++] = coordinateType1; |
| 247 | } |
| 248 | } else { |
| 249 | DCHECK(coordinateType1.IsNull()); |
| 250 | } |
| 251 | |
| 252 | switch (access_mode_template) { |
| 253 | case AccessModeTemplate::kCompareAndExchange: |
| 254 | case AccessModeTemplate::kCompareAndSet: |
| 255 | parameters[index++] = varType; |
| 256 | parameters[index++] = varType; |
| 257 | return index; |
| 258 | case AccessModeTemplate::kGet: |
| 259 | return index; |
| 260 | case AccessModeTemplate::kGetAndUpdate: |
| 261 | case AccessModeTemplate::kSet: |
| 262 | parameters[index++] = varType; |
| 263 | return index; |
| 264 | } |
| 265 | return -1; |
| 266 | } |
| 267 | |
| 268 | // Returns the return type associated with an AccessModeTemplate based |
| 269 | // on the template and the variable type specified. |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 270 | static ObjPtr<Class> GetReturnType(AccessModeTemplate access_mode_template, ObjPtr<Class> varType) |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 271 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 272 | DCHECK(varType != nullptr); |
| 273 | switch (access_mode_template) { |
| 274 | case AccessModeTemplate::kCompareAndSet: |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 275 | return GetClassRoot(ClassRoot::kPrimitiveBoolean); |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 276 | case AccessModeTemplate::kCompareAndExchange: |
| 277 | case AccessModeTemplate::kGet: |
| 278 | case AccessModeTemplate::kGetAndUpdate: |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 279 | return varType; |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 280 | case AccessModeTemplate::kSet: |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 281 | return GetClassRoot(ClassRoot::kPrimitiveVoid); |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 282 | } |
| 283 | return nullptr; |
| 284 | } |
| 285 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 286 | // Method to insert a read barrier for accessors to reference fields. |
| 287 | inline void ReadBarrierForVarHandleAccess(ObjPtr<Object> obj, MemberOffset field_offset) |
| 288 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 289 | if (kUseReadBarrier) { |
| 290 | // We need to ensure that the reference stored in the field is a to-space one before attempting |
| 291 | // the CompareAndSet/CompareAndExchange/Exchange operation otherwise it will fail incorrectly |
| 292 | // if obj is in the process of being moved. |
| 293 | uint8_t* raw_field_addr = reinterpret_cast<uint8_t*>(obj.Ptr()) + field_offset.SizeValue(); |
| 294 | auto field_addr = reinterpret_cast<mirror::HeapReference<mirror::Object>*>(raw_field_addr); |
| 295 | // Note that the read barrier load does NOT need to be volatile. |
| 296 | static constexpr bool kIsVolatile = false; |
| 297 | static constexpr bool kAlwaysUpdateField = true; |
| 298 | ReadBarrier::Barrier<mirror::Object, kIsVolatile, kWithReadBarrier, kAlwaysUpdateField>( |
| 299 | obj.Ptr(), |
| 300 | MemberOffset(field_offset), |
| 301 | field_addr); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | inline MemberOffset GetMemberOffset(jfieldID field_id) REQUIRES_SHARED(Locks::mutator_lock_) { |
| 306 | ArtField* const field = jni::DecodeArtField(field_id); |
| 307 | return field->GetOffset(); |
| 308 | } |
| 309 | |
| 310 | // |
| 311 | // Helper methods for storing results from atomic operations into |
| 312 | // JValue instances. |
| 313 | // |
| 314 | |
| 315 | inline void StoreResult(uint8_t value, JValue* result) { |
| 316 | result->SetZ(value); |
| 317 | } |
| 318 | |
| 319 | inline void StoreResult(int8_t value, JValue* result) { |
| 320 | result->SetB(value); |
| 321 | } |
| 322 | |
| 323 | inline void StoreResult(uint16_t value, JValue* result) { |
| 324 | result->SetC(value); |
| 325 | } |
| 326 | |
| 327 | inline void StoreResult(int16_t value, JValue* result) { |
| 328 | result->SetS(value); |
| 329 | } |
| 330 | |
| 331 | inline void StoreResult(int32_t value, JValue* result) { |
| 332 | result->SetI(value); |
| 333 | } |
| 334 | |
| 335 | inline void StoreResult(int64_t value, JValue* result) { |
| 336 | result->SetJ(value); |
| 337 | } |
| 338 | |
| 339 | inline void StoreResult(float value, JValue* result) { |
| 340 | result->SetF(value); |
| 341 | } |
| 342 | |
| 343 | inline void StoreResult(double value, JValue* result) { |
| 344 | result->SetD(value); |
| 345 | } |
| 346 | |
| 347 | inline void StoreResult(ObjPtr<Object> value, JValue* result) |
| 348 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 349 | result->SetL(value); |
| 350 | } |
| 351 | |
| 352 | // |
| 353 | // Helper class for byte-swapping value that has been stored in a JValue. |
| 354 | // |
| 355 | |
| 356 | template <typename T> |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 357 | class JValueByteSwapper final { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 358 | public: |
| 359 | static void ByteSwap(JValue* value); |
| 360 | static void MaybeByteSwap(bool byte_swap, JValue* value) { |
| 361 | if (byte_swap) { |
| 362 | ByteSwap(value); |
| 363 | } |
| 364 | } |
| 365 | }; |
| 366 | |
| 367 | template <> |
| 368 | void JValueByteSwapper<uint16_t>::ByteSwap(JValue* value) { |
| 369 | value->SetC(BSWAP(value->GetC())); |
| 370 | } |
| 371 | |
| 372 | template <> |
| 373 | void JValueByteSwapper<int16_t>::ByteSwap(JValue* value) { |
| 374 | value->SetS(BSWAP(value->GetS())); |
| 375 | } |
| 376 | |
| 377 | template <> |
| 378 | void JValueByteSwapper<int32_t>::ByteSwap(JValue* value) { |
| 379 | value->SetI(BSWAP(value->GetI())); |
| 380 | } |
| 381 | |
| 382 | template <> |
| 383 | void JValueByteSwapper<int64_t>::ByteSwap(JValue* value) { |
| 384 | value->SetJ(BSWAP(value->GetJ())); |
| 385 | } |
| 386 | |
| 387 | // |
| 388 | // Accessor implementations, shared across all VarHandle types. |
| 389 | // |
| 390 | |
| 391 | template <typename T, std::memory_order MO> |
| 392 | class AtomicGetAccessor : public Object::Accessor<T> { |
| 393 | public: |
| 394 | explicit AtomicGetAccessor(JValue* result) : result_(result) {} |
| 395 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 396 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 397 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 398 | StoreResult(atom->load(MO), result_); |
| 399 | } |
| 400 | |
| 401 | private: |
| 402 | JValue* result_; |
| 403 | }; |
| 404 | |
| 405 | template <typename T, std::memory_order MO> |
| 406 | class AtomicSetAccessor : public Object::Accessor<T> { |
| 407 | public: |
| 408 | explicit AtomicSetAccessor(T new_value) : new_value_(new_value) {} |
| 409 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 410 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 411 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 412 | atom->store(new_value_, MO); |
| 413 | } |
| 414 | |
| 415 | private: |
| 416 | T new_value_; |
| 417 | }; |
| 418 | |
| 419 | template <typename T> using GetAccessor = AtomicGetAccessor<T, std::memory_order_relaxed>; |
| 420 | |
| 421 | template <typename T> using SetAccessor = AtomicSetAccessor<T, std::memory_order_relaxed>; |
| 422 | |
| 423 | template <typename T> |
| 424 | using GetVolatileAccessor = AtomicGetAccessor<T, std::memory_order_seq_cst>; |
| 425 | |
| 426 | template <typename T> |
| 427 | using SetVolatileAccessor = AtomicSetAccessor<T, std::memory_order_seq_cst>; |
| 428 | |
| 429 | template <typename T, std::memory_order MOS, std::memory_order MOF> |
| 430 | class AtomicStrongCompareAndSetAccessor : public Object::Accessor<T> { |
| 431 | public: |
| 432 | AtomicStrongCompareAndSetAccessor(T expected_value, T desired_value, JValue* result) |
| 433 | : expected_value_(expected_value), desired_value_(desired_value), result_(result) {} |
| 434 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 435 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 436 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 437 | bool success = atom->compare_exchange_strong(expected_value_, desired_value_, MOS, MOF); |
| 438 | StoreResult(success ? JNI_TRUE : JNI_FALSE, result_); |
| 439 | } |
| 440 | |
| 441 | private: |
| 442 | T expected_value_; |
| 443 | T desired_value_; |
| 444 | JValue* result_; |
| 445 | }; |
| 446 | |
| 447 | template<typename T> |
| 448 | using CompareAndSetAccessor = |
| 449 | AtomicStrongCompareAndSetAccessor<T, std::memory_order_seq_cst, std::memory_order_seq_cst>; |
| 450 | |
| 451 | template <typename T, std::memory_order MOS, std::memory_order MOF> |
| 452 | class AtomicStrongCompareAndExchangeAccessor : public Object::Accessor<T> { |
| 453 | public: |
| 454 | AtomicStrongCompareAndExchangeAccessor(T expected_value, T desired_value, JValue* result) |
| 455 | : expected_value_(expected_value), desired_value_(desired_value), result_(result) {} |
| 456 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 457 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 458 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 459 | atom->compare_exchange_strong(expected_value_, desired_value_, MOS, MOF); |
| 460 | StoreResult(expected_value_, result_); |
| 461 | } |
| 462 | |
| 463 | private: |
| 464 | T expected_value_; |
| 465 | T desired_value_; |
| 466 | JValue* result_; |
| 467 | }; |
| 468 | |
| 469 | template <typename T> |
| 470 | using CompareAndExchangeAccessor = |
| 471 | AtomicStrongCompareAndExchangeAccessor<T, std::memory_order_seq_cst, std::memory_order_seq_cst>; |
| 472 | |
| 473 | template <typename T, std::memory_order MOS, std::memory_order MOF> |
| 474 | class AtomicWeakCompareAndSetAccessor : public Object::Accessor<T> { |
| 475 | public: |
| 476 | AtomicWeakCompareAndSetAccessor(T expected_value, T desired_value, JValue* result) |
| 477 | : expected_value_(expected_value), desired_value_(desired_value), result_(result) {} |
| 478 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 479 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 480 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 481 | bool success = atom->compare_exchange_weak(expected_value_, desired_value_, MOS, MOF); |
| 482 | StoreResult(success ? JNI_TRUE : JNI_FALSE, result_); |
| 483 | } |
| 484 | |
| 485 | private: |
| 486 | T expected_value_; |
| 487 | T desired_value_; |
| 488 | JValue* result_; |
| 489 | }; |
| 490 | |
| 491 | template <typename T> |
| 492 | using WeakCompareAndSetAccessor = |
| 493 | AtomicWeakCompareAndSetAccessor<T, std::memory_order_seq_cst, std::memory_order_seq_cst>; |
| 494 | |
| 495 | template <typename T, std::memory_order MO> |
| 496 | class AtomicGetAndSetAccessor : public Object::Accessor<T> { |
| 497 | public: |
| 498 | AtomicGetAndSetAccessor(T new_value, JValue* result) : new_value_(new_value), result_(result) {} |
| 499 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 500 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 501 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 502 | T old_value = atom->exchange(new_value_, MO); |
| 503 | StoreResult(old_value, result_); |
| 504 | } |
| 505 | |
| 506 | private: |
| 507 | T new_value_; |
| 508 | JValue* result_; |
| 509 | }; |
| 510 | |
| 511 | template <typename T> |
| 512 | using GetAndSetAccessor = AtomicGetAndSetAccessor<T, std::memory_order_seq_cst>; |
| 513 | |
| 514 | template <typename T, bool kIsFloat, std::memory_order MO> |
| 515 | class AtomicGetAndAddOperator { |
| 516 | public: |
| 517 | static T Apply(T* addr, T addend) { |
| 518 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 519 | return atom->fetch_add(addend, MO); |
| 520 | } |
| 521 | }; |
| 522 | |
| 523 | template <typename T, std::memory_order MO> |
| 524 | class AtomicGetAndAddOperator<T, /* kIsFloat */ true, MO> { |
| 525 | public: |
| 526 | static T Apply(T* addr, T addend) { |
| 527 | // c++11 does not have std::atomic<T>::fetch_and_add for floating |
| 528 | // point types, so we effect one with a compare and swap. |
| 529 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 530 | T old_value = atom->load(std::memory_order_relaxed); |
| 531 | T new_value; |
| 532 | do { |
| 533 | new_value = old_value + addend; |
| 534 | } while (!atom->compare_exchange_weak(old_value, new_value, MO, std::memory_order_relaxed)); |
| 535 | return old_value; |
| 536 | } |
| 537 | }; |
| 538 | |
| 539 | template <typename T, std::memory_order MO> |
| 540 | class AtomicGetAndAddAccessor : public Object::Accessor<T> { |
| 541 | public: |
| 542 | AtomicGetAndAddAccessor(T addend, JValue* result) : addend_(addend), result_(result) {} |
| 543 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 544 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 545 | constexpr bool kIsFloatingPoint = std::is_floating_point<T>::value; |
| 546 | T old_value = AtomicGetAndAddOperator<T, kIsFloatingPoint, MO>::Apply(addr, addend_); |
| 547 | StoreResult(old_value, result_); |
| 548 | } |
| 549 | |
| 550 | private: |
| 551 | T addend_; |
| 552 | JValue* result_; |
| 553 | }; |
| 554 | |
| 555 | template <typename T> |
| 556 | using GetAndAddAccessor = AtomicGetAndAddAccessor<T, std::memory_order_seq_cst>; |
| 557 | |
| 558 | // Accessor specifically for memory views where the caller can specify |
| 559 | // the byte-ordering. Addition only works outside of the byte-swapped |
| 560 | // memory view because of the direction of carries. |
| 561 | template <typename T, std::memory_order MO> |
| 562 | class AtomicGetAndAddWithByteSwapAccessor : public Object::Accessor<T> { |
| 563 | public: |
| 564 | AtomicGetAndAddWithByteSwapAccessor(T value, JValue* result) : value_(value), result_(result) {} |
| 565 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 566 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 567 | std::atomic<T>* const atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 568 | T current_value = atom->load(std::memory_order_relaxed); |
| 569 | T sum; |
| 570 | do { |
| 571 | sum = BSWAP(current_value) + value_; |
| 572 | // NB current_value is a pass-by-reference argument in the call to |
| 573 | // atomic<T>::compare_exchange_weak(). |
| 574 | } while (!atom->compare_exchange_weak(current_value, |
| 575 | BSWAP(sum), |
| 576 | MO, |
| 577 | std::memory_order_relaxed)); |
| 578 | StoreResult(BSWAP(current_value), result_); |
| 579 | } |
| 580 | |
| 581 | private: |
| 582 | T value_; |
| 583 | JValue* result_; |
| 584 | }; |
| 585 | |
| 586 | template <typename T> |
| 587 | using GetAndAddWithByteSwapAccessor = |
| 588 | AtomicGetAndAddWithByteSwapAccessor<T, std::memory_order_seq_cst>; |
| 589 | |
| 590 | template <typename T, std::memory_order MO> |
| 591 | class AtomicGetAndBitwiseOrAccessor : public Object::Accessor<T> { |
| 592 | public: |
| 593 | AtomicGetAndBitwiseOrAccessor(T value, JValue* result) : value_(value), result_(result) {} |
| 594 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 595 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 596 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 597 | T old_value = atom->fetch_or(value_, MO); |
| 598 | StoreResult(old_value, result_); |
| 599 | } |
| 600 | |
| 601 | private: |
| 602 | T value_; |
| 603 | JValue* result_; |
| 604 | }; |
| 605 | |
| 606 | template <typename T> |
| 607 | using GetAndBitwiseOrAccessor = AtomicGetAndBitwiseOrAccessor<T, std::memory_order_seq_cst>; |
| 608 | |
| 609 | template <typename T, std::memory_order MO> |
| 610 | class AtomicGetAndBitwiseAndAccessor : public Object::Accessor<T> { |
| 611 | public: |
| 612 | AtomicGetAndBitwiseAndAccessor(T value, JValue* result) : value_(value), result_(result) {} |
| 613 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 614 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 615 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 616 | T old_value = atom->fetch_and(value_, MO); |
| 617 | StoreResult(old_value, result_); |
| 618 | } |
| 619 | |
| 620 | private: |
| 621 | T value_; |
| 622 | JValue* result_; |
| 623 | }; |
| 624 | |
| 625 | template <typename T> |
| 626 | using GetAndBitwiseAndAccessor = |
| 627 | AtomicGetAndBitwiseAndAccessor<T, std::memory_order_seq_cst>; |
| 628 | |
| 629 | template <typename T, std::memory_order MO> |
| 630 | class AtomicGetAndBitwiseXorAccessor : public Object::Accessor<T> { |
| 631 | public: |
| 632 | AtomicGetAndBitwiseXorAccessor(T value, JValue* result) : value_(value), result_(result) {} |
| 633 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 634 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 635 | std::atomic<T>* atom = reinterpret_cast<std::atomic<T>*>(addr); |
| 636 | T old_value = atom->fetch_xor(value_, MO); |
| 637 | StoreResult(old_value, result_); |
| 638 | } |
| 639 | |
| 640 | private: |
| 641 | T value_; |
| 642 | JValue* result_; |
| 643 | }; |
| 644 | |
| 645 | template <typename T> |
| 646 | using GetAndBitwiseXorAccessor = AtomicGetAndBitwiseXorAccessor<T, std::memory_order_seq_cst>; |
| 647 | |
| 648 | // |
| 649 | // Unreachable access modes. |
| 650 | // |
| 651 | |
| 652 | NO_RETURN void UnreachableAccessMode(const char* access_mode, const char* type_name) { |
| 653 | LOG(FATAL) << "Unreachable access mode :" << access_mode << " for type " << type_name; |
| 654 | UNREACHABLE(); |
| 655 | } |
| 656 | |
| 657 | #define UNREACHABLE_ACCESS_MODE(ACCESS_MODE, TYPE) \ |
| 658 | template<> void ACCESS_MODE ## Accessor<TYPE>::Access(TYPE*) { \ |
| 659 | UnreachableAccessMode(#ACCESS_MODE, #TYPE); \ |
| 660 | } |
| 661 | |
| 662 | // The boolean primitive type is not numeric (boolean == std::uint8_t). |
| 663 | UNREACHABLE_ACCESS_MODE(GetAndAdd, uint8_t) |
| 664 | |
| 665 | // The floating point types do not support bitwise operations. |
| 666 | UNREACHABLE_ACCESS_MODE(GetAndBitwiseOr, float) |
| 667 | UNREACHABLE_ACCESS_MODE(GetAndBitwiseAnd, float) |
| 668 | UNREACHABLE_ACCESS_MODE(GetAndBitwiseXor, float) |
| 669 | UNREACHABLE_ACCESS_MODE(GetAndBitwiseOr, double) |
| 670 | UNREACHABLE_ACCESS_MODE(GetAndBitwiseAnd, double) |
| 671 | UNREACHABLE_ACCESS_MODE(GetAndBitwiseXor, double) |
| 672 | |
| 673 | // A helper class for object field accesses for floats and |
| 674 | // doubles. The object interface deals with Field32 and Field64. The |
| 675 | // former is used for both integers and floats, the latter for longs |
| 676 | // and doubles. This class provides the necessary coercion. |
| 677 | template <typename T, typename U> |
| 678 | class TypeAdaptorAccessor : public Object::Accessor<T> { |
| 679 | public: |
| 680 | explicit TypeAdaptorAccessor(Object::Accessor<U>* inner_accessor) |
| 681 | : inner_accessor_(inner_accessor) {} |
| 682 | |
Roland Levillain | bbc6e7e | 2018-08-24 16:58:47 +0100 | [diff] [blame] | 683 | void Access(T* addr) override { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 684 | static_assert(sizeof(T) == sizeof(U), "bad conversion"); |
| 685 | inner_accessor_->Access(reinterpret_cast<U*>(addr)); |
| 686 | } |
| 687 | |
| 688 | private: |
| 689 | Object::Accessor<U>* inner_accessor_; |
| 690 | }; |
| 691 | |
| 692 | template <typename T> |
| 693 | class FieldAccessViaAccessor { |
| 694 | public: |
Andreas Gampe | c55bb39 | 2018-09-21 00:02:02 +0000 | [diff] [blame] | 695 | using Accessor = Object::Accessor<T>; |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 696 | |
| 697 | // Apply an Accessor to get a field in an object. |
| 698 | static void Get(ObjPtr<Object> obj, |
| 699 | MemberOffset field_offset, |
| 700 | Accessor* accessor) |
| 701 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 702 | obj->GetPrimitiveFieldViaAccessor(field_offset, accessor); |
| 703 | } |
| 704 | |
| 705 | // Apply an Accessor to update a field in an object. |
| 706 | static void Update(ObjPtr<Object> obj, |
| 707 | MemberOffset field_offset, |
| 708 | Accessor* accessor) |
| 709 | REQUIRES_SHARED(Locks::mutator_lock_); |
| 710 | }; |
| 711 | |
| 712 | template <> |
| 713 | inline void FieldAccessViaAccessor<float>::Get(ObjPtr<Object> obj, |
| 714 | MemberOffset field_offset, |
| 715 | Accessor* accessor) |
| 716 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 717 | TypeAdaptorAccessor<int32_t, float> float_to_int_accessor(accessor); |
| 718 | obj->GetPrimitiveFieldViaAccessor(field_offset, &float_to_int_accessor); |
| 719 | } |
| 720 | |
| 721 | template <> |
| 722 | inline void FieldAccessViaAccessor<double>::Get(ObjPtr<Object> obj, |
| 723 | MemberOffset field_offset, |
| 724 | Accessor* accessor) |
| 725 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 726 | TypeAdaptorAccessor<int64_t, double> double_to_int_accessor(accessor); |
| 727 | obj->GetPrimitiveFieldViaAccessor(field_offset, &double_to_int_accessor); |
| 728 | } |
| 729 | |
| 730 | template <> |
| 731 | void FieldAccessViaAccessor<uint8_t>::Update(ObjPtr<Object> obj, |
| 732 | MemberOffset field_offset, |
| 733 | Accessor* accessor) |
| 734 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 735 | if (Runtime::Current()->IsActiveTransaction()) { |
| 736 | obj->UpdateFieldBooleanViaAccessor<kTransactionActive>(field_offset, accessor); |
| 737 | } else { |
| 738 | obj->UpdateFieldBooleanViaAccessor<kTransactionInactive>(field_offset, accessor); |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | template <> |
| 743 | void FieldAccessViaAccessor<int8_t>::Update(ObjPtr<Object> obj, |
| 744 | MemberOffset field_offset, |
| 745 | Accessor* accessor) |
| 746 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 747 | if (Runtime::Current()->IsActiveTransaction()) { |
| 748 | obj->UpdateFieldByteViaAccessor<kTransactionActive>(field_offset, accessor); |
| 749 | } else { |
| 750 | obj->UpdateFieldByteViaAccessor<kTransactionInactive>(field_offset, accessor); |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | template <> |
| 755 | void FieldAccessViaAccessor<uint16_t>::Update(ObjPtr<Object> obj, |
| 756 | MemberOffset field_offset, |
| 757 | Accessor* accessor) |
| 758 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 759 | if (Runtime::Current()->IsActiveTransaction()) { |
| 760 | obj->UpdateFieldCharViaAccessor<kTransactionActive>(field_offset, accessor); |
| 761 | } else { |
| 762 | obj->UpdateFieldCharViaAccessor<kTransactionInactive>(field_offset, accessor); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | template <> |
| 767 | void FieldAccessViaAccessor<int16_t>::Update(ObjPtr<Object> obj, |
| 768 | MemberOffset field_offset, |
| 769 | Accessor* accessor) |
| 770 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 771 | if (Runtime::Current()->IsActiveTransaction()) { |
| 772 | obj->UpdateFieldShortViaAccessor<kTransactionActive>(field_offset, accessor); |
| 773 | } else { |
| 774 | obj->UpdateFieldShortViaAccessor<kTransactionInactive>(field_offset, accessor); |
| 775 | } |
| 776 | } |
| 777 | |
| 778 | template <> |
| 779 | void FieldAccessViaAccessor<int32_t>::Update(ObjPtr<Object> obj, |
| 780 | MemberOffset field_offset, |
| 781 | Accessor* accessor) |
| 782 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 783 | if (Runtime::Current()->IsActiveTransaction()) { |
| 784 | obj->UpdateField32ViaAccessor<kTransactionActive>(field_offset, accessor); |
| 785 | } else { |
| 786 | obj->UpdateField32ViaAccessor<kTransactionInactive>(field_offset, accessor); |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | template <> |
| 791 | void FieldAccessViaAccessor<int64_t>::Update(ObjPtr<Object> obj, |
| 792 | MemberOffset field_offset, |
| 793 | Accessor* accessor) |
| 794 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 795 | if (Runtime::Current()->IsActiveTransaction()) { |
| 796 | obj->UpdateField64ViaAccessor<kTransactionActive>(field_offset, accessor); |
| 797 | } else { |
| 798 | obj->UpdateField64ViaAccessor<kTransactionInactive>(field_offset, accessor); |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | template <> |
| 803 | void FieldAccessViaAccessor<float>::Update(ObjPtr<Object> obj, |
| 804 | MemberOffset field_offset, |
| 805 | Accessor* accessor) |
| 806 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 807 | TypeAdaptorAccessor<int32_t, float> float_to_int_accessor(accessor); |
| 808 | if (Runtime::Current()->IsActiveTransaction()) { |
| 809 | obj->UpdateField32ViaAccessor<kTransactionActive>(field_offset, &float_to_int_accessor); |
| 810 | } else { |
| 811 | obj->UpdateField32ViaAccessor<kTransactionInactive>(field_offset, &float_to_int_accessor); |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | template <> |
| 816 | void FieldAccessViaAccessor<double>::Update(ObjPtr<Object> obj, |
| 817 | MemberOffset field_offset, |
| 818 | Accessor* accessor) |
| 819 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 820 | TypeAdaptorAccessor<int64_t, double> double_to_int_accessor(accessor); |
| 821 | if (Runtime::Current()->IsActiveTransaction()) { |
| 822 | obj->UpdateField64ViaAccessor<kTransactionActive>(field_offset, &double_to_int_accessor); |
| 823 | } else { |
| 824 | obj->UpdateField64ViaAccessor<kTransactionInactive>(field_offset, &double_to_int_accessor); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | // Helper class that gets values from a shadow frame with appropriate type coercion. |
| 829 | template <typename T> |
| 830 | class ValueGetter { |
| 831 | public: |
| 832 | static T Get(ShadowFrameGetter* getter) REQUIRES_SHARED(Locks::mutator_lock_) { |
| 833 | static_assert(sizeof(T) <= sizeof(uint32_t), "Bad size"); |
| 834 | uint32_t raw_value = getter->Get(); |
| 835 | return static_cast<T>(raw_value); |
| 836 | } |
| 837 | }; |
| 838 | |
| 839 | template <> |
| 840 | int64_t ValueGetter<int64_t>::Get(ShadowFrameGetter* getter) { |
| 841 | return getter->GetLong(); |
| 842 | } |
| 843 | |
| 844 | template <> |
| 845 | float ValueGetter<float>::Get(ShadowFrameGetter* getter) { |
| 846 | uint32_t raw_value = getter->Get(); |
| 847 | return *reinterpret_cast<float*>(&raw_value); |
| 848 | } |
| 849 | |
| 850 | template <> |
| 851 | double ValueGetter<double>::Get(ShadowFrameGetter* getter) { |
| 852 | int64_t raw_value = getter->GetLong(); |
| 853 | return *reinterpret_cast<double*>(&raw_value); |
| 854 | } |
| 855 | |
| 856 | template <> |
| 857 | ObjPtr<Object> ValueGetter<ObjPtr<Object>>::Get(ShadowFrameGetter* getter) { |
| 858 | return getter->GetReference(); |
| 859 | } |
| 860 | |
| 861 | // Class for accessing fields of Object instances |
| 862 | template <typename T> |
| 863 | class FieldAccessor { |
| 864 | public: |
| 865 | static bool Dispatch(VarHandle::AccessMode access_mode, |
| 866 | ObjPtr<Object> obj, |
| 867 | MemberOffset field_offset, |
| 868 | ShadowFrameGetter* getter, |
| 869 | JValue* result) |
| 870 | REQUIRES_SHARED(Locks::mutator_lock_); |
| 871 | }; |
| 872 | |
| 873 | // Dispatch implementation for primitive fields. |
| 874 | template <typename T> |
| 875 | bool FieldAccessor<T>::Dispatch(VarHandle::AccessMode access_mode, |
| 876 | ObjPtr<Object> obj, |
| 877 | MemberOffset field_offset, |
| 878 | ShadowFrameGetter* getter, |
| 879 | JValue* result) { |
| 880 | switch (access_mode) { |
| 881 | case VarHandle::AccessMode::kGet: { |
| 882 | GetAccessor<T> accessor(result); |
| 883 | FieldAccessViaAccessor<T>::Get(obj, field_offset, &accessor); |
| 884 | break; |
| 885 | } |
| 886 | case VarHandle::AccessMode::kSet: { |
| 887 | T new_value = ValueGetter<T>::Get(getter); |
| 888 | SetAccessor<T> accessor(new_value); |
| 889 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 890 | break; |
| 891 | } |
| 892 | case VarHandle::AccessMode::kGetAcquire: |
| 893 | case VarHandle::AccessMode::kGetOpaque: |
| 894 | case VarHandle::AccessMode::kGetVolatile: { |
| 895 | GetVolatileAccessor<T> accessor(result); |
| 896 | FieldAccessViaAccessor<T>::Get(obj, field_offset, &accessor); |
| 897 | break; |
| 898 | } |
| 899 | case VarHandle::AccessMode::kSetOpaque: |
| 900 | case VarHandle::AccessMode::kSetRelease: |
| 901 | case VarHandle::AccessMode::kSetVolatile: { |
| 902 | T new_value = ValueGetter<T>::Get(getter); |
| 903 | SetVolatileAccessor<T> accessor(new_value); |
| 904 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 905 | break; |
| 906 | } |
| 907 | case VarHandle::AccessMode::kCompareAndSet: { |
| 908 | T expected_value = ValueGetter<T>::Get(getter); |
| 909 | T desired_value = ValueGetter<T>::Get(getter); |
| 910 | CompareAndSetAccessor<T> accessor(expected_value, desired_value, result); |
| 911 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 912 | break; |
| 913 | } |
| 914 | case VarHandle::AccessMode::kCompareAndExchange: |
| 915 | case VarHandle::AccessMode::kCompareAndExchangeAcquire: |
| 916 | case VarHandle::AccessMode::kCompareAndExchangeRelease: { |
| 917 | T expected_value = ValueGetter<T>::Get(getter); |
| 918 | T desired_value = ValueGetter<T>::Get(getter); |
| 919 | CompareAndExchangeAccessor<T> accessor(expected_value, desired_value, result); |
| 920 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 921 | break; |
| 922 | } |
| 923 | case VarHandle::AccessMode::kWeakCompareAndSet: |
| 924 | case VarHandle::AccessMode::kWeakCompareAndSetAcquire: |
| 925 | case VarHandle::AccessMode::kWeakCompareAndSetPlain: |
| 926 | case VarHandle::AccessMode::kWeakCompareAndSetRelease: { |
| 927 | T expected_value = ValueGetter<T>::Get(getter); |
| 928 | T desired_value = ValueGetter<T>::Get(getter); |
| 929 | WeakCompareAndSetAccessor<T> accessor(expected_value, desired_value, result); |
| 930 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 931 | break; |
| 932 | } |
| 933 | case VarHandle::AccessMode::kGetAndSet: |
| 934 | case VarHandle::AccessMode::kGetAndSetAcquire: |
| 935 | case VarHandle::AccessMode::kGetAndSetRelease: { |
| 936 | T new_value = ValueGetter<T>::Get(getter); |
| 937 | GetAndSetAccessor<T> accessor(new_value, result); |
| 938 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 939 | break; |
| 940 | } |
| 941 | case VarHandle::AccessMode::kGetAndAdd: |
| 942 | case VarHandle::AccessMode::kGetAndAddAcquire: |
| 943 | case VarHandle::AccessMode::kGetAndAddRelease: { |
| 944 | T value = ValueGetter<T>::Get(getter); |
| 945 | GetAndAddAccessor<T> accessor(value, result); |
| 946 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 947 | break; |
| 948 | } |
| 949 | case VarHandle::AccessMode::kGetAndBitwiseOr: |
| 950 | case VarHandle::AccessMode::kGetAndBitwiseOrAcquire: |
| 951 | case VarHandle::AccessMode::kGetAndBitwiseOrRelease: { |
| 952 | T value = ValueGetter<T>::Get(getter); |
| 953 | GetAndBitwiseOrAccessor<T> accessor(value, result); |
| 954 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 955 | break; |
| 956 | } |
| 957 | case VarHandle::AccessMode::kGetAndBitwiseAnd: |
| 958 | case VarHandle::AccessMode::kGetAndBitwiseAndAcquire: |
| 959 | case VarHandle::AccessMode::kGetAndBitwiseAndRelease: { |
| 960 | T value = ValueGetter<T>::Get(getter); |
| 961 | GetAndBitwiseAndAccessor<T> accessor(value, result); |
| 962 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 963 | break; |
| 964 | } |
| 965 | case VarHandle::AccessMode::kGetAndBitwiseXor: |
| 966 | case VarHandle::AccessMode::kGetAndBitwiseXorAcquire: |
| 967 | case VarHandle::AccessMode::kGetAndBitwiseXorRelease: { |
| 968 | T value = ValueGetter<T>::Get(getter); |
| 969 | GetAndBitwiseXorAccessor<T> accessor(value, result); |
| 970 | FieldAccessViaAccessor<T>::Update(obj, field_offset, &accessor); |
| 971 | break; |
| 972 | } |
| 973 | } |
| 974 | return true; |
| 975 | } |
| 976 | |
| 977 | // Dispatch implementation for reference fields. |
| 978 | template <> |
| 979 | bool FieldAccessor<ObjPtr<Object>>::Dispatch(VarHandle::AccessMode access_mode, |
| 980 | ObjPtr<Object> obj, |
| 981 | MemberOffset field_offset, |
| 982 | ShadowFrameGetter* getter, |
| 983 | JValue* result) |
| 984 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 985 | // To keep things simple, use the minimum strongest existing |
| 986 | // field accessor for Object fields. This may be the most |
| 987 | // straightforward strategy in general for the interpreter. |
| 988 | switch (access_mode) { |
| 989 | case VarHandle::AccessMode::kGet: { |
| 990 | StoreResult(obj->GetFieldObject<Object>(field_offset), result); |
| 991 | break; |
| 992 | } |
| 993 | case VarHandle::AccessMode::kSet: { |
| 994 | ObjPtr<Object> new_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 995 | if (Runtime::Current()->IsActiveTransaction()) { |
| 996 | obj->SetFieldObject<kTransactionActive>(field_offset, new_value); |
| 997 | } else { |
| 998 | obj->SetFieldObject<kTransactionInactive>(field_offset, new_value); |
| 999 | } |
| 1000 | break; |
| 1001 | } |
| 1002 | case VarHandle::AccessMode::kGetAcquire: |
| 1003 | case VarHandle::AccessMode::kGetOpaque: |
| 1004 | case VarHandle::AccessMode::kGetVolatile: { |
| 1005 | StoreResult(obj->GetFieldObjectVolatile<Object>(field_offset), result); |
| 1006 | break; |
| 1007 | } |
| 1008 | case VarHandle::AccessMode::kSetOpaque: |
| 1009 | case VarHandle::AccessMode::kSetRelease: |
| 1010 | case VarHandle::AccessMode::kSetVolatile: { |
| 1011 | ObjPtr<Object> new_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1012 | if (Runtime::Current()->IsActiveTransaction()) { |
| 1013 | obj->SetFieldObjectVolatile<kTransactionActive>(field_offset, new_value); |
| 1014 | } else { |
| 1015 | obj->SetFieldObjectVolatile<kTransactionInactive>(field_offset, new_value); |
| 1016 | } |
| 1017 | break; |
| 1018 | } |
| 1019 | case VarHandle::AccessMode::kCompareAndSet: { |
| 1020 | ReadBarrierForVarHandleAccess(obj, field_offset); |
| 1021 | ObjPtr<Object> expected_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1022 | ObjPtr<Object> desired_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1023 | bool cas_result; |
| 1024 | if (Runtime::Current()->IsActiveTransaction()) { |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1025 | cas_result = obj->CasFieldObject<kTransactionActive>(field_offset, |
| 1026 | expected_value, |
| 1027 | desired_value, |
| 1028 | CASMode::kStrong, |
| 1029 | std::memory_order_seq_cst); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1030 | } else { |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1031 | cas_result = obj->CasFieldObject<kTransactionInactive>(field_offset, |
| 1032 | expected_value, |
| 1033 | desired_value, |
| 1034 | CASMode::kStrong, |
| 1035 | std::memory_order_seq_cst); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1036 | } |
Andreas Gampe | 5ec6f36 | 2018-09-20 17:25:05 -0700 | [diff] [blame] | 1037 | StoreResult(static_cast<uint8_t>(cas_result), result); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1038 | break; |
| 1039 | } |
| 1040 | case VarHandle::AccessMode::kWeakCompareAndSet: |
| 1041 | case VarHandle::AccessMode::kWeakCompareAndSetAcquire: |
| 1042 | case VarHandle::AccessMode::kWeakCompareAndSetPlain: |
| 1043 | case VarHandle::AccessMode::kWeakCompareAndSetRelease: { |
| 1044 | ReadBarrierForVarHandleAccess(obj, field_offset); |
| 1045 | ObjPtr<Object> expected_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1046 | ObjPtr<Object> desired_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1047 | bool cas_result; |
| 1048 | if (Runtime::Current()->IsActiveTransaction()) { |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1049 | cas_result = obj->CasFieldObject<kTransactionActive>(field_offset, |
| 1050 | expected_value, |
| 1051 | desired_value, |
| 1052 | CASMode::kWeak, |
| 1053 | std::memory_order_seq_cst); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1054 | } else { |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1055 | cas_result = obj->CasFieldObject<kTransactionInactive>( |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1056 | field_offset, |
| 1057 | expected_value, |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1058 | desired_value, |
| 1059 | CASMode::kWeak, |
| 1060 | std::memory_order_seq_cst); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1061 | } |
Andreas Gampe | 5ec6f36 | 2018-09-20 17:25:05 -0700 | [diff] [blame] | 1062 | StoreResult(static_cast<uint8_t>(cas_result), result); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1063 | break; |
| 1064 | } |
| 1065 | case VarHandle::AccessMode::kCompareAndExchange: |
| 1066 | case VarHandle::AccessMode::kCompareAndExchangeAcquire: |
| 1067 | case VarHandle::AccessMode::kCompareAndExchangeRelease: { |
| 1068 | ReadBarrierForVarHandleAccess(obj, field_offset); |
| 1069 | ObjPtr<Object> expected_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1070 | ObjPtr<Object> desired_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1071 | ObjPtr<Object> witness_value; |
| 1072 | if (Runtime::Current()->IsActiveTransaction()) { |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1073 | witness_value = obj->CompareAndExchangeFieldObject<kTransactionActive>(field_offset, |
| 1074 | expected_value, |
| 1075 | desired_value); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1076 | } else { |
Mathieu Chartier | a9746b9 | 2018-06-22 10:25:40 -0700 | [diff] [blame] | 1077 | witness_value = obj->CompareAndExchangeFieldObject<kTransactionInactive>(field_offset, |
| 1078 | expected_value, |
| 1079 | desired_value); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1080 | } |
| 1081 | StoreResult(witness_value, result); |
| 1082 | break; |
| 1083 | } |
| 1084 | case VarHandle::AccessMode::kGetAndSet: |
| 1085 | case VarHandle::AccessMode::kGetAndSetAcquire: |
| 1086 | case VarHandle::AccessMode::kGetAndSetRelease: { |
| 1087 | ReadBarrierForVarHandleAccess(obj, field_offset); |
| 1088 | ObjPtr<Object> new_value = ValueGetter<ObjPtr<Object>>::Get(getter); |
| 1089 | ObjPtr<Object> old_value; |
| 1090 | if (Runtime::Current()->IsActiveTransaction()) { |
| 1091 | old_value = obj->ExchangeFieldObject<kTransactionActive>(field_offset, new_value); |
| 1092 | } else { |
| 1093 | old_value = obj->ExchangeFieldObject<kTransactionInactive>(field_offset, new_value); |
| 1094 | } |
| 1095 | StoreResult(old_value, result); |
| 1096 | break; |
| 1097 | } |
| 1098 | case VarHandle::AccessMode::kGetAndAdd: |
| 1099 | case VarHandle::AccessMode::kGetAndAddAcquire: |
| 1100 | case VarHandle::AccessMode::kGetAndAddRelease: |
| 1101 | case VarHandle::AccessMode::kGetAndBitwiseOr: |
| 1102 | case VarHandle::AccessMode::kGetAndBitwiseOrAcquire: |
| 1103 | case VarHandle::AccessMode::kGetAndBitwiseOrRelease: |
| 1104 | case VarHandle::AccessMode::kGetAndBitwiseAnd: |
| 1105 | case VarHandle::AccessMode::kGetAndBitwiseAndAcquire: |
| 1106 | case VarHandle::AccessMode::kGetAndBitwiseAndRelease: |
| 1107 | case VarHandle::AccessMode::kGetAndBitwiseXor: |
| 1108 | case VarHandle::AccessMode::kGetAndBitwiseXorAcquire: |
| 1109 | case VarHandle::AccessMode::kGetAndBitwiseXorRelease: { |
| 1110 | size_t index = static_cast<size_t>(access_mode); |
| 1111 | const char* access_mode_name = kAccessorToAccessMode[index].method_name; |
| 1112 | UnreachableAccessMode(access_mode_name, "Object"); |
| 1113 | } |
| 1114 | } |
| 1115 | return true; |
| 1116 | } |
| 1117 | |
| 1118 | // Class for accessing primitive array elements. |
| 1119 | template <typename T> |
| 1120 | class PrimitiveArrayElementAccessor { |
| 1121 | public: |
| 1122 | static T* GetElementAddress(ObjPtr<Array> target_array, int target_element) |
| 1123 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 1124 | auto primitive_array = ObjPtr<PrimitiveArray<T>>::DownCast(target_array); |
| 1125 | DCHECK(primitive_array->CheckIsValidIndex(target_element)); |
| 1126 | return &primitive_array->GetData()[target_element]; |
| 1127 | } |
| 1128 | |
| 1129 | static bool Dispatch(VarHandle::AccessMode access_mode, |
| 1130 | ObjPtr<Array> target_array, |
| 1131 | int target_element, |
| 1132 | ShadowFrameGetter* getter, |
| 1133 | JValue* result) |
| 1134 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 1135 | T* element_address = GetElementAddress(target_array, target_element); |
| 1136 | switch (access_mode) { |
| 1137 | case VarHandle::AccessMode::kGet: { |
| 1138 | GetAccessor<T> accessor(result); |
| 1139 | accessor.Access(element_address); |
| 1140 | break; |
| 1141 | } |
| 1142 | case VarHandle::AccessMode::kSet: { |
| 1143 | T new_value = ValueGetter<T>::Get(getter); |
| 1144 | SetAccessor<T> accessor(new_value); |
| 1145 | accessor.Access(element_address); |
| 1146 | break; |
| 1147 | } |
| 1148 | case VarHandle::AccessMode::kGetAcquire: |
| 1149 | case VarHandle::AccessMode::kGetOpaque: |
| 1150 | case VarHandle::AccessMode::kGetVolatile: { |
| 1151 | GetVolatileAccessor<T> accessor(result); |
| 1152 | accessor.Access(element_address); |
| 1153 | break; |
| 1154 | } |
| 1155 | case VarHandle::AccessMode::kSetOpaque: |
| 1156 | case VarHandle::AccessMode::kSetRelease: |
| 1157 | case VarHandle::AccessMode::kSetVolatile: { |
| 1158 | T new_value = ValueGetter<T>::Get(getter); |
| 1159 | SetVolatileAccessor<T> accessor(new_value); |
| 1160 | accessor.Access(element_address); |
| 1161 | break; |
| 1162 | } |
| 1163 | case VarHandle::AccessMode::kCompareAndSet: { |
| 1164 | T expected_value = ValueGetter<T>::Get(getter); |
| 1165 | T desired_value = ValueGetter<T>::Get(getter); |
| 1166 | CompareAndSetAccessor<T> accessor(expected_value, desired_value, result); |
| 1167 | accessor.Access(element_address); |
| 1168 | break; |
| 1169 | } |
| 1170 | case VarHandle::AccessMode::kCompareAndExchange: |
| 1171 | case VarHandle::AccessMode::kCompareAndExchangeAcquire: |
| 1172 | case VarHandle::AccessMode::kCompareAndExchangeRelease: { |
| 1173 | T expected_value = ValueGetter<T>::Get(getter); |
| 1174 | T desired_value = ValueGetter<T>::Get(getter); |
| 1175 | CompareAndExchangeAccessor<T> accessor(expected_value, desired_value, result); |
| 1176 | accessor.Access(element_address); |
| 1177 | break; |
| 1178 | } |
| 1179 | case VarHandle::AccessMode::kWeakCompareAndSet: |
| 1180 | case VarHandle::AccessMode::kWeakCompareAndSetAcquire: |
| 1181 | case VarHandle::AccessMode::kWeakCompareAndSetPlain: |
| 1182 | case VarHandle::AccessMode::kWeakCompareAndSetRelease: { |
| 1183 | T expected_value = ValueGetter<T>::Get(getter); |
| 1184 | T desired_value = ValueGetter<T>::Get(getter); |
| 1185 | WeakCompareAndSetAccessor<T> accessor(expected_value, desired_value, result); |
| 1186 | accessor.Access(element_address); |
| 1187 | break; |
| 1188 | } |
| 1189 | case VarHandle::AccessMode::kGetAndSet: |
| 1190 | case VarHandle::AccessMode::kGetAndSetAcquire: |
| 1191 | case VarHandle::AccessMode::kGetAndSetRelease: { |
| 1192 | T new_value = ValueGetter<T>::Get(getter); |
| 1193 | GetAndSetAccessor<T> accessor(new_value, result); |
| 1194 | accessor.Access(element_address); |
| 1195 | break; |
| 1196 | } |
| 1197 | case VarHandle::AccessMode::kGetAndAdd: |
| 1198 | case VarHandle::AccessMode::kGetAndAddAcquire: |
| 1199 | case VarHandle::AccessMode::kGetAndAddRelease: { |
| 1200 | T value = ValueGetter<T>::Get(getter); |
| 1201 | GetAndAddAccessor<T> accessor(value, result); |
| 1202 | accessor.Access(element_address); |
| 1203 | break; |
| 1204 | } |
| 1205 | case VarHandle::AccessMode::kGetAndBitwiseOr: |
| 1206 | case VarHandle::AccessMode::kGetAndBitwiseOrAcquire: |
| 1207 | case VarHandle::AccessMode::kGetAndBitwiseOrRelease: { |
| 1208 | T value = ValueGetter<T>::Get(getter); |
| 1209 | GetAndBitwiseOrAccessor<T> accessor(value, result); |
| 1210 | accessor.Access(element_address); |
| 1211 | break; |
| 1212 | } |
| 1213 | case VarHandle::AccessMode::kGetAndBitwiseAnd: |
| 1214 | case VarHandle::AccessMode::kGetAndBitwiseAndAcquire: |
| 1215 | case VarHandle::AccessMode::kGetAndBitwiseAndRelease: { |
| 1216 | T value = ValueGetter<T>::Get(getter); |
| 1217 | GetAndBitwiseAndAccessor<T> accessor(value, result); |
| 1218 | accessor.Access(element_address); |
| 1219 | break; |
| 1220 | } |
| 1221 | case VarHandle::AccessMode::kGetAndBitwiseXor: |
| 1222 | case VarHandle::AccessMode::kGetAndBitwiseXorAcquire: |
| 1223 | case VarHandle::AccessMode::kGetAndBitwiseXorRelease: { |
| 1224 | T value = ValueGetter<T>::Get(getter); |
| 1225 | GetAndBitwiseXorAccessor<T> accessor(value, result); |
| 1226 | accessor.Access(element_address); |
| 1227 | break; |
| 1228 | } |
| 1229 | } |
| 1230 | return true; |
| 1231 | } |
| 1232 | }; |
| 1233 | |
| 1234 | // Class for accessing primitive array elements. |
| 1235 | template <typename T> |
| 1236 | class ByteArrayViewAccessor { |
| 1237 | public: |
| 1238 | static inline bool IsAccessAligned(int8_t* data, int data_index) { |
| 1239 | static_assert(IsPowerOfTwo(sizeof(T)), "unexpected size"); |
| 1240 | static_assert(std::is_arithmetic<T>::value, "unexpected type"); |
| 1241 | uintptr_t alignment_mask = sizeof(T) - 1; |
| 1242 | uintptr_t address = reinterpret_cast<uintptr_t>(data + data_index); |
| 1243 | return (address & alignment_mask) == 0; |
| 1244 | } |
| 1245 | |
| 1246 | static inline void MaybeByteSwap(bool byte_swap, T* const value) { |
| 1247 | if (byte_swap) { |
| 1248 | *value = BSWAP(*value); |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | static bool Dispatch(const VarHandle::AccessMode access_mode, |
| 1253 | int8_t* const data, |
| 1254 | const int data_index, |
| 1255 | const bool byte_swap, |
| 1256 | ShadowFrameGetter* const getter, |
| 1257 | JValue* const result) |
| 1258 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 1259 | const bool is_aligned = IsAccessAligned(data, data_index); |
| 1260 | if (!is_aligned) { |
| 1261 | switch (access_mode) { |
| 1262 | case VarHandle::AccessMode::kGet: { |
| 1263 | T value; |
| 1264 | memcpy(&value, data + data_index, sizeof(T)); |
| 1265 | MaybeByteSwap(byte_swap, &value); |
| 1266 | StoreResult(value, result); |
| 1267 | return true; |
| 1268 | } |
| 1269 | case VarHandle::AccessMode::kSet: { |
| 1270 | T new_value = ValueGetter<T>::Get(getter); |
| 1271 | MaybeByteSwap(byte_swap, &new_value); |
| 1272 | memcpy(data + data_index, &new_value, sizeof(T)); |
| 1273 | return true; |
| 1274 | } |
| 1275 | default: |
| 1276 | // No other access modes support unaligned access. |
| 1277 | ThrowIllegalStateException("Unaligned access not supported"); |
| 1278 | return false; |
| 1279 | } |
| 1280 | } |
| 1281 | |
| 1282 | T* const element_address = reinterpret_cast<T*>(data + data_index); |
| 1283 | CHECK(IsAccessAligned(reinterpret_cast<int8_t*>(element_address), 0)); |
| 1284 | switch (access_mode) { |
| 1285 | case VarHandle::AccessMode::kGet: { |
| 1286 | GetAccessor<T> accessor(result); |
| 1287 | accessor.Access(element_address); |
| 1288 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1289 | break; |
| 1290 | } |
| 1291 | case VarHandle::AccessMode::kSet: { |
| 1292 | T new_value = ValueGetter<T>::Get(getter); |
| 1293 | MaybeByteSwap(byte_swap, &new_value); |
| 1294 | SetAccessor<T> accessor(new_value); |
| 1295 | accessor.Access(element_address); |
| 1296 | break; |
| 1297 | } |
| 1298 | case VarHandle::AccessMode::kGetAcquire: |
| 1299 | case VarHandle::AccessMode::kGetOpaque: |
| 1300 | case VarHandle::AccessMode::kGetVolatile: { |
| 1301 | GetVolatileAccessor<T> accessor(result); |
| 1302 | accessor.Access(element_address); |
| 1303 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1304 | break; |
| 1305 | } |
| 1306 | case VarHandle::AccessMode::kSetOpaque: |
| 1307 | case VarHandle::AccessMode::kSetRelease: |
| 1308 | case VarHandle::AccessMode::kSetVolatile: { |
| 1309 | T new_value = ValueGetter<T>::Get(getter); |
| 1310 | MaybeByteSwap(byte_swap, &new_value); |
| 1311 | SetVolatileAccessor<T> accessor(new_value); |
| 1312 | accessor.Access(element_address); |
| 1313 | break; |
| 1314 | } |
| 1315 | case VarHandle::AccessMode::kCompareAndSet: { |
| 1316 | T expected_value = ValueGetter<T>::Get(getter); |
| 1317 | T desired_value = ValueGetter<T>::Get(getter); |
| 1318 | MaybeByteSwap(byte_swap, &expected_value); |
| 1319 | MaybeByteSwap(byte_swap, &desired_value); |
| 1320 | CompareAndSetAccessor<T> accessor(expected_value, desired_value, result); |
| 1321 | accessor.Access(element_address); |
| 1322 | break; |
| 1323 | } |
| 1324 | case VarHandle::AccessMode::kCompareAndExchange: |
| 1325 | case VarHandle::AccessMode::kCompareAndExchangeAcquire: |
| 1326 | case VarHandle::AccessMode::kCompareAndExchangeRelease: { |
| 1327 | T expected_value = ValueGetter<T>::Get(getter); |
| 1328 | T desired_value = ValueGetter<T>::Get(getter); |
| 1329 | MaybeByteSwap(byte_swap, &expected_value); |
| 1330 | MaybeByteSwap(byte_swap, &desired_value); |
| 1331 | CompareAndExchangeAccessor<T> accessor(expected_value, desired_value, result); |
| 1332 | accessor.Access(element_address); |
| 1333 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1334 | break; |
| 1335 | } |
| 1336 | case VarHandle::AccessMode::kWeakCompareAndSet: |
| 1337 | case VarHandle::AccessMode::kWeakCompareAndSetAcquire: |
| 1338 | case VarHandle::AccessMode::kWeakCompareAndSetPlain: |
| 1339 | case VarHandle::AccessMode::kWeakCompareAndSetRelease: { |
| 1340 | T expected_value = ValueGetter<T>::Get(getter); |
| 1341 | T desired_value = ValueGetter<T>::Get(getter); |
| 1342 | MaybeByteSwap(byte_swap, &expected_value); |
| 1343 | MaybeByteSwap(byte_swap, &desired_value); |
| 1344 | WeakCompareAndSetAccessor<T> accessor(expected_value, desired_value, result); |
| 1345 | accessor.Access(element_address); |
| 1346 | break; |
| 1347 | } |
| 1348 | case VarHandle::AccessMode::kGetAndSet: |
| 1349 | case VarHandle::AccessMode::kGetAndSetAcquire: |
| 1350 | case VarHandle::AccessMode::kGetAndSetRelease: { |
| 1351 | T new_value = ValueGetter<T>::Get(getter); |
| 1352 | MaybeByteSwap(byte_swap, &new_value); |
| 1353 | GetAndSetAccessor<T> accessor(new_value, result); |
| 1354 | accessor.Access(element_address); |
| 1355 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1356 | break; |
| 1357 | } |
| 1358 | case VarHandle::AccessMode::kGetAndAdd: |
| 1359 | case VarHandle::AccessMode::kGetAndAddAcquire: |
| 1360 | case VarHandle::AccessMode::kGetAndAddRelease: { |
| 1361 | T value = ValueGetter<T>::Get(getter); |
| 1362 | if (byte_swap) { |
| 1363 | GetAndAddWithByteSwapAccessor<T> accessor(value, result); |
| 1364 | accessor.Access(element_address); |
| 1365 | } else { |
| 1366 | GetAndAddAccessor<T> accessor(value, result); |
| 1367 | accessor.Access(element_address); |
| 1368 | } |
| 1369 | break; |
| 1370 | } |
| 1371 | case VarHandle::AccessMode::kGetAndBitwiseOr: |
| 1372 | case VarHandle::AccessMode::kGetAndBitwiseOrAcquire: |
| 1373 | case VarHandle::AccessMode::kGetAndBitwiseOrRelease: { |
| 1374 | T value = ValueGetter<T>::Get(getter); |
| 1375 | MaybeByteSwap(byte_swap, &value); |
| 1376 | GetAndBitwiseOrAccessor<T> accessor(value, result); |
| 1377 | accessor.Access(element_address); |
| 1378 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1379 | break; |
| 1380 | } |
| 1381 | case VarHandle::AccessMode::kGetAndBitwiseAnd: |
| 1382 | case VarHandle::AccessMode::kGetAndBitwiseAndAcquire: |
| 1383 | case VarHandle::AccessMode::kGetAndBitwiseAndRelease: { |
| 1384 | T value = ValueGetter<T>::Get(getter); |
| 1385 | MaybeByteSwap(byte_swap, &value); |
| 1386 | GetAndBitwiseAndAccessor<T> accessor(value, result); |
| 1387 | accessor.Access(element_address); |
| 1388 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1389 | break; |
| 1390 | } |
| 1391 | case VarHandle::AccessMode::kGetAndBitwiseXor: |
| 1392 | case VarHandle::AccessMode::kGetAndBitwiseXorAcquire: |
| 1393 | case VarHandle::AccessMode::kGetAndBitwiseXorRelease: { |
| 1394 | T value = ValueGetter<T>::Get(getter); |
| 1395 | MaybeByteSwap(byte_swap, &value); |
| 1396 | GetAndBitwiseXorAccessor<T> accessor(value, result); |
| 1397 | accessor.Access(element_address); |
| 1398 | JValueByteSwapper<T>::MaybeByteSwap(byte_swap, result); |
| 1399 | break; |
| 1400 | } |
| 1401 | } |
| 1402 | return true; |
| 1403 | } |
| 1404 | }; |
| 1405 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1406 | } // namespace |
| 1407 | |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1408 | ObjPtr<Class> VarHandle::GetVarType() { |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1409 | return GetFieldObject<Class>(VarTypeOffset()); |
| 1410 | } |
| 1411 | |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1412 | ObjPtr<Class> VarHandle::GetCoordinateType0() { |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1413 | return GetFieldObject<Class>(CoordinateType0Offset()); |
| 1414 | } |
| 1415 | |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1416 | ObjPtr<Class> VarHandle::GetCoordinateType1() { |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1417 | return GetFieldObject<Class>(CoordinateType1Offset()); |
| 1418 | } |
| 1419 | |
| 1420 | int32_t VarHandle::GetAccessModesBitMask() { |
| 1421 | return GetField32(AccessModesBitMaskOffset()); |
| 1422 | } |
| 1423 | |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1424 | VarHandle::MatchKind VarHandle::GetMethodTypeMatchForAccessMode(AccessMode access_mode, |
| 1425 | MethodType* method_type) { |
| 1426 | MatchKind match = MatchKind::kExact; |
| 1427 | |
| 1428 | ObjPtr<VarHandle> vh = this; |
| 1429 | ObjPtr<Class> var_type = vh->GetVarType(); |
| 1430 | ObjPtr<Class> mt_rtype = method_type->GetRType(); |
Orion Hodson | c4d3bf4 | 2018-02-06 16:02:49 +0000 | [diff] [blame] | 1431 | AccessModeTemplate access_mode_template = GetAccessModeTemplate(access_mode); |
Orion Hodson | c4d3bf4 | 2018-02-06 16:02:49 +0000 | [diff] [blame] | 1432 | |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1433 | // Check return type first. If the return type of the method |
| 1434 | // of the VarHandle is immaterial. |
| 1435 | if (mt_rtype->GetPrimitiveType() != Primitive::Type::kPrimVoid) { |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1436 | ObjPtr<Class> vh_rtype = GetReturnType(access_mode_template, var_type); |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1437 | if (vh_rtype != mt_rtype) { |
| 1438 | if (!IsReturnTypeConvertible(vh_rtype, mt_rtype)) { |
| 1439 | return MatchKind::kNone; |
| 1440 | } |
| 1441 | match = MatchKind::kWithConversions; |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1442 | } |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1443 | } |
| 1444 | |
| 1445 | // Check the number of parameters matches. |
| 1446 | ObjPtr<Class> vh_ptypes[VarHandle::kMaxAccessorParameters]; |
| 1447 | const int32_t vh_ptypes_count = BuildParameterArray(vh_ptypes, |
| 1448 | access_mode_template, |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1449 | var_type, |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1450 | GetCoordinateType0(), |
| 1451 | GetCoordinateType1()); |
| 1452 | if (vh_ptypes_count != method_type->GetPTypes()->GetLength()) { |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1453 | return MatchKind::kNone; |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1454 | } |
| 1455 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1456 | // Check the parameter types are compatible. |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1457 | ObjPtr<ObjectArray<Class>> mt_ptypes = method_type->GetPTypes(); |
| 1458 | for (int32_t i = 0; i < vh_ptypes_count; ++i) { |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1459 | if (mt_ptypes->Get(i) == vh_ptypes[i]) { |
| 1460 | continue; |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1461 | } |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1462 | if (!IsParameterTypeConvertible(mt_ptypes->Get(i), vh_ptypes[i])) { |
| 1463 | return MatchKind::kNone; |
| 1464 | } |
| 1465 | match = MatchKind::kWithConversions; |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1466 | } |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1467 | return match; |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1468 | } |
| 1469 | |
Orion Hodson | b8b9387 | 2018-01-30 07:51:10 +0000 | [diff] [blame] | 1470 | bool VarHandle::IsInvokerMethodTypeCompatible(AccessMode access_mode, |
| 1471 | MethodType* method_type) { |
| 1472 | StackHandleScope<3> hs(Thread::Current()); |
| 1473 | Handle<Class> mt_rtype(hs.NewHandle(method_type->GetRType())); |
| 1474 | Handle<VarHandle> vh(hs.NewHandle(this)); |
| 1475 | Handle<Class> var_type(hs.NewHandle(vh->GetVarType())); |
| 1476 | AccessModeTemplate access_mode_template = GetAccessModeTemplate(access_mode); |
| 1477 | |
| 1478 | // Check return type first. |
| 1479 | if (mt_rtype->GetPrimitiveType() == Primitive::Type::kPrimVoid) { |
| 1480 | // The result of the operation will be discarded. The return type |
| 1481 | // of the VarHandle is immaterial. |
| 1482 | } else { |
| 1483 | ObjPtr<Class> vh_rtype(GetReturnType(access_mode_template, var_type.Get())); |
| 1484 | if (!IsReturnTypeConvertible(vh_rtype, mt_rtype.Get())) { |
| 1485 | return false; |
| 1486 | } |
| 1487 | } |
| 1488 | |
| 1489 | // Check the number of parameters matches (ignoring the VarHandle parameter). |
| 1490 | static const int32_t kVarHandleParameters = 1; |
| 1491 | ObjPtr<Class> vh_ptypes[VarHandle::kMaxAccessorParameters]; |
| 1492 | const int32_t vh_ptypes_count = BuildParameterArray(vh_ptypes, |
| 1493 | access_mode_template, |
| 1494 | var_type.Get(), |
| 1495 | GetCoordinateType0(), |
| 1496 | GetCoordinateType1()); |
| 1497 | if (vh_ptypes_count != method_type->GetPTypes()->GetLength() - kVarHandleParameters) { |
| 1498 | return false; |
| 1499 | } |
| 1500 | |
| 1501 | // Check the parameter types are compatible (ignoring the VarHandle parameter). |
| 1502 | ObjPtr<ObjectArray<Class>> mt_ptypes = method_type->GetPTypes(); |
| 1503 | for (int32_t i = 0; i < vh_ptypes_count; ++i) { |
| 1504 | if (!IsParameterTypeConvertible(mt_ptypes->Get(i + kVarHandleParameters), vh_ptypes[i])) { |
| 1505 | return false; |
| 1506 | } |
| 1507 | } |
| 1508 | return true; |
| 1509 | } |
| 1510 | |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1511 | ObjPtr<MethodType> VarHandle::GetMethodTypeForAccessMode(Thread* self, |
| 1512 | ObjPtr<VarHandle> var_handle, |
| 1513 | AccessMode access_mode) { |
Orion Hodson | c4d5c13 | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1514 | // This is a static method as the var_handle might be moved by the GC during it's execution. |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1515 | AccessModeTemplate access_mode_template = GetAccessModeTemplate(access_mode); |
| 1516 | |
| 1517 | StackHandleScope<3> hs(self); |
| 1518 | Handle<VarHandle> vh = hs.NewHandle(var_handle); |
| 1519 | Handle<Class> rtype = hs.NewHandle(GetReturnType(access_mode_template, vh->GetVarType())); |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1520 | const int32_t ptypes_count = GetNumberOfParameters(access_mode_template, |
| 1521 | vh->GetCoordinateType0(), |
| 1522 | vh->GetCoordinateType1()); |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1523 | ObjPtr<Class> array_of_class = GetClassRoot<ObjectArray<Class>>(); |
| 1524 | Handle<ObjectArray<Class>> ptypes = |
| 1525 | hs.NewHandle(ObjectArray<Class>::Alloc(Thread::Current(), array_of_class, ptypes_count)); |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1526 | if (ptypes == nullptr) { |
| 1527 | return nullptr; |
| 1528 | } |
| 1529 | |
| 1530 | ObjPtr<Class> ptypes_array[VarHandle::kMaxAccessorParameters]; |
| 1531 | BuildParameterArray(ptypes_array, |
| 1532 | access_mode_template, |
| 1533 | vh->GetVarType(), |
| 1534 | vh->GetCoordinateType0(), |
| 1535 | vh->GetCoordinateType1()); |
| 1536 | for (int32_t i = 0; i < ptypes_count; ++i) { |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1537 | ptypes->Set(i, ptypes_array[i]); |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1538 | } |
| 1539 | return MethodType::Create(self, rtype, ptypes); |
| 1540 | } |
| 1541 | |
Vladimir Marko | a8bba7d | 2018-05-30 15:18:48 +0100 | [diff] [blame] | 1542 | ObjPtr<MethodType> VarHandle::GetMethodTypeForAccessMode(Thread* self, AccessMode access_mode) { |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1543 | return GetMethodTypeForAccessMode(self, this, access_mode); |
| 1544 | } |
| 1545 | |
Orion Hodson | 3f38346 | 2018-05-17 14:03:39 +0100 | [diff] [blame] | 1546 | std::string VarHandle::PrettyDescriptorForAccessMode(AccessMode access_mode) { |
| 1547 | // Effect MethodType::PrettyDescriptor() without first creating a method type first. |
| 1548 | std::ostringstream oss; |
| 1549 | oss << '('; |
| 1550 | |
| 1551 | AccessModeTemplate access_mode_template = GetAccessModeTemplate(access_mode); |
| 1552 | ObjPtr<Class> var_type = GetVarType(); |
| 1553 | ObjPtr<Class> ctypes[2] = { GetCoordinateType0(), GetCoordinateType1() }; |
| 1554 | const int32_t ptypes_count = GetNumberOfParameters(access_mode_template, ctypes[0], ctypes[1]); |
| 1555 | int32_t ptypes_done = 0; |
| 1556 | for (ObjPtr<Class> ctype : ctypes) { |
| 1557 | if (!ctype.IsNull()) { |
| 1558 | if (ptypes_done != 0) { |
| 1559 | oss << ", "; |
| 1560 | } |
| 1561 | oss << ctype->PrettyDescriptor();; |
| 1562 | ptypes_done++; |
| 1563 | } |
| 1564 | } |
| 1565 | while (ptypes_done != ptypes_count) { |
| 1566 | if (ptypes_done != 0) { |
| 1567 | oss << ", "; |
| 1568 | } |
| 1569 | oss << var_type->PrettyDescriptor(); |
| 1570 | ptypes_done++; |
| 1571 | } |
| 1572 | ObjPtr<Class> rtype = GetReturnType(access_mode_template, var_type); |
| 1573 | oss << ')' << rtype->PrettyDescriptor(); |
| 1574 | return oss.str(); |
| 1575 | } |
| 1576 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1577 | bool VarHandle::Access(AccessMode access_mode, |
| 1578 | ShadowFrame* shadow_frame, |
Orion Hodson | 537a4fe | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1579 | const InstructionOperands* const operands, |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1580 | JValue* result) { |
Vladimir Marko | c7aa87e | 2018-05-24 15:19:52 +0100 | [diff] [blame] | 1581 | ObjPtr<ObjectArray<Class>> class_roots = Runtime::Current()->GetClassLinker()->GetClassRoots(); |
| 1582 | ObjPtr<Class> klass = GetClass(); |
| 1583 | if (klass == GetClassRoot<FieldVarHandle>(class_roots)) { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1584 | auto vh = reinterpret_cast<FieldVarHandle*>(this); |
| 1585 | return vh->Access(access_mode, shadow_frame, operands, result); |
Vladimir Marko | c7aa87e | 2018-05-24 15:19:52 +0100 | [diff] [blame] | 1586 | } else if (klass == GetClassRoot<ArrayElementVarHandle>(class_roots)) { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1587 | auto vh = reinterpret_cast<ArrayElementVarHandle*>(this); |
| 1588 | return vh->Access(access_mode, shadow_frame, operands, result); |
Vladimir Marko | c7aa87e | 2018-05-24 15:19:52 +0100 | [diff] [blame] | 1589 | } else if (klass == GetClassRoot<ByteArrayViewVarHandle>(class_roots)) { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1590 | auto vh = reinterpret_cast<ByteArrayViewVarHandle*>(this); |
| 1591 | return vh->Access(access_mode, shadow_frame, operands, result); |
Vladimir Marko | c7aa87e | 2018-05-24 15:19:52 +0100 | [diff] [blame] | 1592 | } else if (klass == GetClassRoot<ByteBufferViewVarHandle>(class_roots)) { |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1593 | auto vh = reinterpret_cast<ByteBufferViewVarHandle*>(this); |
| 1594 | return vh->Access(access_mode, shadow_frame, operands, result); |
| 1595 | } else { |
| 1596 | LOG(FATAL) << "Unknown varhandle kind"; |
| 1597 | UNREACHABLE(); |
| 1598 | } |
| 1599 | } |
| 1600 | |
Orion Hodson | fe92d12 | 2018-01-02 10:45:17 +0000 | [diff] [blame] | 1601 | const char* VarHandle::GetReturnTypeDescriptor(const char* accessor_name) { |
| 1602 | AccessMode access_mode; |
| 1603 | if (!GetAccessModeByMethodName(accessor_name, &access_mode)) { |
| 1604 | return nullptr; |
| 1605 | } |
| 1606 | AccessModeTemplate access_mode_template = GetAccessModeTemplate(access_mode); |
| 1607 | switch (access_mode_template) { |
| 1608 | case AccessModeTemplate::kGet: |
| 1609 | case AccessModeTemplate::kCompareAndExchange: |
| 1610 | case AccessModeTemplate::kGetAndUpdate: |
| 1611 | return "Ljava/lang/Object;"; |
| 1612 | case AccessModeTemplate::kCompareAndSet: |
| 1613 | return "Z"; |
| 1614 | case AccessModeTemplate::kSet: |
| 1615 | return "V"; |
| 1616 | } |
| 1617 | } |
| 1618 | |
Orion Hodson | b8b9387 | 2018-01-30 07:51:10 +0000 | [diff] [blame] | 1619 | VarHandle::AccessMode VarHandle::GetAccessModeByIntrinsic(Intrinsics intrinsic) { |
| 1620 | #define VAR_HANDLE_ACCESS_MODE(V) \ |
| 1621 | V(CompareAndExchange) \ |
| 1622 | V(CompareAndExchangeAcquire) \ |
| 1623 | V(CompareAndExchangeRelease) \ |
| 1624 | V(CompareAndSet) \ |
| 1625 | V(Get) \ |
| 1626 | V(GetAcquire) \ |
| 1627 | V(GetAndAdd) \ |
| 1628 | V(GetAndAddAcquire) \ |
| 1629 | V(GetAndAddRelease) \ |
| 1630 | V(GetAndBitwiseAnd) \ |
| 1631 | V(GetAndBitwiseAndAcquire) \ |
| 1632 | V(GetAndBitwiseAndRelease) \ |
| 1633 | V(GetAndBitwiseOr) \ |
| 1634 | V(GetAndBitwiseOrAcquire) \ |
| 1635 | V(GetAndBitwiseOrRelease) \ |
| 1636 | V(GetAndBitwiseXor) \ |
| 1637 | V(GetAndBitwiseXorAcquire) \ |
| 1638 | V(GetAndBitwiseXorRelease) \ |
| 1639 | V(GetAndSet) \ |
| 1640 | V(GetAndSetAcquire) \ |
| 1641 | V(GetAndSetRelease) \ |
| 1642 | V(GetOpaque) \ |
| 1643 | V(GetVolatile) \ |
| 1644 | V(Set) \ |
| 1645 | V(SetOpaque) \ |
| 1646 | V(SetRelease) \ |
| 1647 | V(SetVolatile) \ |
| 1648 | V(WeakCompareAndSet) \ |
| 1649 | V(WeakCompareAndSetAcquire) \ |
| 1650 | V(WeakCompareAndSetPlain) \ |
| 1651 | V(WeakCompareAndSetRelease) |
| 1652 | switch (intrinsic) { |
| 1653 | #define INTRINSIC_CASE(Name) \ |
| 1654 | case Intrinsics::kVarHandle ## Name: \ |
| 1655 | return VarHandle::AccessMode::k ## Name; |
| 1656 | VAR_HANDLE_ACCESS_MODE(INTRINSIC_CASE) |
| 1657 | #undef INTRINSIC_CASE |
| 1658 | #undef VAR_HANDLE_ACCESS_MODE |
| 1659 | default: |
| 1660 | break; |
| 1661 | } |
| 1662 | LOG(FATAL) << "Unknown VarHandle instrinsic: " << static_cast<int>(intrinsic); |
| 1663 | UNREACHABLE(); |
| 1664 | } |
| 1665 | |
Orion Hodson | fe92d12 | 2018-01-02 10:45:17 +0000 | [diff] [blame] | 1666 | bool VarHandle::GetAccessModeByMethodName(const char* method_name, AccessMode* access_mode) { |
| 1667 | if (method_name == nullptr) { |
| 1668 | return false; |
| 1669 | } |
| 1670 | VarHandleAccessorToAccessModeEntry target = { method_name, /*dummy*/VarHandle::AccessMode::kGet }; |
| 1671 | auto last = std::cend(kAccessorToAccessMode); |
| 1672 | auto it = std::lower_bound(std::cbegin(kAccessorToAccessMode), |
| 1673 | last, |
| 1674 | target, |
| 1675 | VarHandleAccessorToAccessModeEntry::CompareName); |
| 1676 | if (it == last || strcmp(it->method_name, method_name) != 0) { |
| 1677 | return false; |
| 1678 | } |
| 1679 | *access_mode = it->access_mode; |
| 1680 | return true; |
| 1681 | } |
| 1682 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1683 | ArtField* FieldVarHandle::GetField() { |
Vladimir Marko | 78baed5 | 2018-10-11 10:44:58 +0100 | [diff] [blame] | 1684 | return reinterpret_cast64<ArtField*>(GetField64(ArtFieldOffset())); |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1685 | } |
| 1686 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1687 | bool FieldVarHandle::Access(AccessMode access_mode, |
| 1688 | ShadowFrame* shadow_frame, |
Orion Hodson | 537a4fe | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1689 | const InstructionOperands* const operands, |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1690 | JValue* result) { |
| 1691 | ShadowFrameGetter getter(*shadow_frame, operands); |
| 1692 | ArtField* field = GetField(); |
| 1693 | ObjPtr<Object> obj; |
| 1694 | if (field->IsStatic()) { |
| 1695 | DCHECK_LE(operands->GetNumberOfOperands(), |
| 1696 | 2u * (Primitive::Is64BitType(GetVarType()->GetPrimitiveType()) ? 2u : 1u)); |
| 1697 | obj = field->GetDeclaringClass(); |
| 1698 | } else { |
| 1699 | DCHECK_GE(operands->GetNumberOfOperands(), 1u); |
| 1700 | DCHECK_LE(operands->GetNumberOfOperands(), |
| 1701 | 1u + 2u * (Primitive::Is64BitType(GetVarType()->GetPrimitiveType()) ? 2u : 1u)); |
| 1702 | obj = getter.GetReference(); |
| 1703 | if (obj.IsNull()) { |
| 1704 | ThrowNullPointerExceptionForCoordinate(); |
| 1705 | return false; |
| 1706 | } |
| 1707 | } |
| 1708 | DCHECK(!obj.IsNull()); |
| 1709 | |
| 1710 | const MemberOffset offset = field->GetOffset(); |
| 1711 | const Primitive::Type primitive_type = GetVarType()->GetPrimitiveType(); |
| 1712 | switch (primitive_type) { |
| 1713 | case Primitive::Type::kPrimNot: |
| 1714 | return FieldAccessor<ObjPtr<Object>>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1715 | case Primitive::kPrimBoolean: |
| 1716 | return FieldAccessor<uint8_t>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1717 | case Primitive::kPrimByte: |
| 1718 | return FieldAccessor<int8_t>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1719 | case Primitive::kPrimChar: |
| 1720 | return FieldAccessor<uint16_t>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1721 | case Primitive::kPrimShort: |
| 1722 | return FieldAccessor<int16_t>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1723 | case Primitive::kPrimInt: |
| 1724 | return FieldAccessor<int32_t>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1725 | case Primitive::kPrimFloat: |
| 1726 | return FieldAccessor<float>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1727 | case Primitive::kPrimLong: |
| 1728 | return FieldAccessor<int64_t>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1729 | case Primitive::kPrimDouble: |
| 1730 | return FieldAccessor<double>::Dispatch(access_mode, obj, offset, &getter, result); |
| 1731 | case Primitive::kPrimVoid: |
| 1732 | break; |
| 1733 | } |
| 1734 | LOG(FATAL) << "Unreachable: Unexpected primitive " << primitive_type; |
| 1735 | UNREACHABLE(); |
| 1736 | } |
| 1737 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1738 | bool ArrayElementVarHandle::Access(AccessMode access_mode, |
| 1739 | ShadowFrame* shadow_frame, |
Orion Hodson | 537a4fe | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1740 | const InstructionOperands* const operands, |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1741 | JValue* result) { |
| 1742 | ShadowFrameGetter getter(*shadow_frame, operands); |
| 1743 | |
| 1744 | // The target array is the first co-ordinate type preceeding var type arguments. |
| 1745 | ObjPtr<Object> raw_array(getter.GetReference()); |
| 1746 | if (raw_array == nullptr) { |
| 1747 | ThrowNullPointerExceptionForCoordinate(); |
| 1748 | return false; |
| 1749 | } |
| 1750 | |
| 1751 | ObjPtr<Array> target_array(raw_array->AsArray()); |
| 1752 | |
| 1753 | // The target array element is the second co-ordinate type preceeding var type arguments. |
| 1754 | const int target_element = getter.Get(); |
| 1755 | if (!target_array->CheckIsValidIndex(target_element)) { |
| 1756 | DCHECK(Thread::Current()->IsExceptionPending()); |
| 1757 | return false; |
| 1758 | } |
| 1759 | |
| 1760 | const Primitive::Type primitive_type = GetVarType()->GetPrimitiveType(); |
| 1761 | switch (primitive_type) { |
| 1762 | case Primitive::Type::kPrimNot: { |
| 1763 | MemberOffset target_element_offset = |
| 1764 | target_array->AsObjectArray<Object>()->OffsetOfElement(target_element); |
| 1765 | return FieldAccessor<ObjPtr<Object>>::Dispatch(access_mode, |
| 1766 | target_array, |
| 1767 | target_element_offset, |
| 1768 | &getter, |
| 1769 | result); |
| 1770 | } |
| 1771 | case Primitive::Type::kPrimBoolean: |
| 1772 | return PrimitiveArrayElementAccessor<uint8_t>::Dispatch(access_mode, |
| 1773 | target_array, |
| 1774 | target_element, |
| 1775 | &getter, |
| 1776 | result); |
| 1777 | case Primitive::Type::kPrimByte: |
| 1778 | return PrimitiveArrayElementAccessor<int8_t>::Dispatch(access_mode, |
| 1779 | target_array, |
| 1780 | target_element, |
| 1781 | &getter, |
| 1782 | result); |
| 1783 | case Primitive::Type::kPrimChar: |
| 1784 | return PrimitiveArrayElementAccessor<uint16_t>::Dispatch(access_mode, |
| 1785 | target_array, |
| 1786 | target_element, |
| 1787 | &getter, |
| 1788 | result); |
| 1789 | case Primitive::Type::kPrimShort: |
| 1790 | return PrimitiveArrayElementAccessor<int16_t>::Dispatch(access_mode, |
| 1791 | target_array, |
| 1792 | target_element, |
| 1793 | &getter, |
| 1794 | result); |
| 1795 | case Primitive::Type::kPrimInt: |
| 1796 | return PrimitiveArrayElementAccessor<int32_t>::Dispatch(access_mode, |
| 1797 | target_array, |
| 1798 | target_element, |
| 1799 | &getter, |
| 1800 | result); |
| 1801 | case Primitive::Type::kPrimLong: |
| 1802 | return PrimitiveArrayElementAccessor<int64_t>::Dispatch(access_mode, |
| 1803 | target_array, |
| 1804 | target_element, |
| 1805 | &getter, |
| 1806 | result); |
| 1807 | case Primitive::Type::kPrimFloat: |
| 1808 | return PrimitiveArrayElementAccessor<float>::Dispatch(access_mode, |
| 1809 | target_array, |
| 1810 | target_element, |
| 1811 | &getter, |
| 1812 | result); |
| 1813 | case Primitive::Type::kPrimDouble: |
| 1814 | return PrimitiveArrayElementAccessor<double>::Dispatch(access_mode, |
| 1815 | target_array, |
| 1816 | target_element, |
| 1817 | &getter, |
| 1818 | result); |
| 1819 | case Primitive::Type::kPrimVoid: |
| 1820 | break; |
| 1821 | } |
| 1822 | LOG(FATAL) << "Unreachable: Unexpected primitive " << primitive_type; |
| 1823 | UNREACHABLE(); |
| 1824 | } |
| 1825 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1826 | bool ByteArrayViewVarHandle::GetNativeByteOrder() { |
| 1827 | return GetFieldBoolean(NativeByteOrderOffset()); |
| 1828 | } |
| 1829 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1830 | bool ByteArrayViewVarHandle::Access(AccessMode access_mode, |
| 1831 | ShadowFrame* shadow_frame, |
Orion Hodson | 537a4fe | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1832 | const InstructionOperands* const operands, |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1833 | JValue* result) { |
| 1834 | ShadowFrameGetter getter(*shadow_frame, operands); |
| 1835 | |
| 1836 | // The byte array is the first co-ordinate type preceeding var type arguments. |
| 1837 | ObjPtr<Object> raw_byte_array(getter.GetReference()); |
| 1838 | if (raw_byte_array == nullptr) { |
| 1839 | ThrowNullPointerExceptionForCoordinate(); |
| 1840 | return false; |
| 1841 | } |
| 1842 | |
| 1843 | ObjPtr<ByteArray> byte_array(raw_byte_array->AsByteArray()); |
| 1844 | |
| 1845 | // The offset in the byte array element is the second co-ordinate type. |
| 1846 | const int32_t data_offset = getter.Get(); |
| 1847 | |
| 1848 | // Bounds check requested access. |
| 1849 | const Primitive::Type primitive_type = GetVarType()->GetPrimitiveType(); |
| 1850 | if (!CheckElementIndex(primitive_type, data_offset, byte_array->GetLength())) { |
| 1851 | return false; |
| 1852 | } |
| 1853 | |
| 1854 | int8_t* const data = byte_array->GetData(); |
| 1855 | bool byte_swap = !GetNativeByteOrder(); |
| 1856 | switch (primitive_type) { |
| 1857 | case Primitive::Type::kPrimNot: |
| 1858 | case Primitive::kPrimBoolean: |
| 1859 | case Primitive::kPrimByte: |
| 1860 | case Primitive::kPrimVoid: |
| 1861 | // These are not supported for byte array views and not instantiable. |
| 1862 | break; |
| 1863 | case Primitive::kPrimChar: |
| 1864 | return ByteArrayViewAccessor<uint16_t>::Dispatch(access_mode, |
| 1865 | data, |
| 1866 | data_offset, |
| 1867 | byte_swap, |
| 1868 | &getter, |
| 1869 | result); |
| 1870 | case Primitive::kPrimShort: |
| 1871 | return ByteArrayViewAccessor<int16_t>::Dispatch(access_mode, |
| 1872 | data, |
| 1873 | data_offset, |
| 1874 | byte_swap, |
| 1875 | &getter, |
| 1876 | result); |
| 1877 | case Primitive::kPrimInt: |
| 1878 | return ByteArrayViewAccessor<int32_t>::Dispatch(access_mode, |
| 1879 | data, |
| 1880 | data_offset, |
| 1881 | byte_swap, |
| 1882 | &getter, |
| 1883 | result); |
| 1884 | case Primitive::kPrimFloat: |
| 1885 | // Treated as a bitwise representation. See javadoc comments for |
| 1886 | // java.lang.invoke.MethodHandles.byteArrayViewVarHandle(). |
| 1887 | return ByteArrayViewAccessor<int32_t>::Dispatch(access_mode, |
| 1888 | data, |
| 1889 | data_offset, |
| 1890 | byte_swap, |
| 1891 | &getter, |
| 1892 | result); |
| 1893 | case Primitive::kPrimLong: |
| 1894 | return ByteArrayViewAccessor<int64_t>::Dispatch(access_mode, |
| 1895 | data, |
| 1896 | data_offset, |
| 1897 | byte_swap, |
| 1898 | &getter, |
| 1899 | result); |
| 1900 | case Primitive::kPrimDouble: |
| 1901 | // Treated as a bitwise representation. See javadoc comments for |
| 1902 | // java.lang.invoke.MethodHandles.byteArrayViewVarHandle(). |
| 1903 | return ByteArrayViewAccessor<int64_t>::Dispatch(access_mode, |
| 1904 | data, |
| 1905 | data_offset, |
| 1906 | byte_swap, |
| 1907 | &getter, |
| 1908 | result); |
| 1909 | } |
| 1910 | LOG(FATAL) << "Unreachable: Unexpected primitive " << primitive_type; |
| 1911 | UNREACHABLE(); |
| 1912 | } |
| 1913 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 1914 | bool ByteBufferViewVarHandle::GetNativeByteOrder() { |
| 1915 | return GetFieldBoolean(NativeByteOrderOffset()); |
| 1916 | } |
| 1917 | |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1918 | bool ByteBufferViewVarHandle::Access(AccessMode access_mode, |
| 1919 | ShadowFrame* shadow_frame, |
Orion Hodson | 537a4fe | 2018-05-15 13:57:58 +0100 | [diff] [blame] | 1920 | const InstructionOperands* const operands, |
Orion Hodson | 928033d | 2018-02-07 05:30:54 +0000 | [diff] [blame] | 1921 | JValue* result) { |
| 1922 | ShadowFrameGetter getter(*shadow_frame, operands); |
| 1923 | |
| 1924 | // The byte buffer is the first co-ordinate argument preceeding var type arguments. |
| 1925 | ObjPtr<Object> byte_buffer(getter.GetReference()); |
| 1926 | if (byte_buffer == nullptr) { |
| 1927 | ThrowNullPointerExceptionForCoordinate(); |
| 1928 | return false; |
| 1929 | } |
| 1930 | |
| 1931 | // The byte index for access is the second co-ordinate |
| 1932 | // argument. This is relative to the offset field of the ByteBuffer. |
| 1933 | const int32_t byte_index = getter.Get(); |
| 1934 | |
| 1935 | // Check access_mode is compatible with ByteBuffer's read-only property. |
| 1936 | bool is_read_only = byte_buffer->GetFieldBoolean( |
| 1937 | GetMemberOffset(WellKnownClasses::java_nio_ByteBuffer_isReadOnly)); |
| 1938 | if (is_read_only && !IsReadOnlyAccessMode(access_mode)) { |
| 1939 | ThrowReadOnlyBufferException(); |
| 1940 | return false; |
| 1941 | } |
| 1942 | |
| 1943 | // The native_address is only set for ByteBuffer instances backed by native memory. |
| 1944 | const int64_t native_address = |
| 1945 | byte_buffer->GetField64(GetMemberOffset(WellKnownClasses::java_nio_ByteBuffer_address)); |
| 1946 | |
| 1947 | // Determine offset and limit for accesses. |
| 1948 | int32_t byte_buffer_offset; |
| 1949 | if (native_address == 0l) { |
| 1950 | // Accessing a heap allocated byte buffer. |
| 1951 | byte_buffer_offset = byte_buffer->GetField32( |
| 1952 | GetMemberOffset(WellKnownClasses::java_nio_ByteBuffer_offset)); |
| 1953 | } else { |
| 1954 | // Accessing direct memory. |
| 1955 | byte_buffer_offset = 0; |
| 1956 | } |
| 1957 | const int32_t byte_buffer_limit = byte_buffer->GetField32( |
| 1958 | GetMemberOffset(WellKnownClasses::java_nio_ByteBuffer_limit)); |
| 1959 | |
| 1960 | const Primitive::Type primitive_type = GetVarType()->GetPrimitiveType(); |
| 1961 | if (!CheckElementIndex(primitive_type, byte_index, byte_buffer_offset, byte_buffer_limit)) { |
| 1962 | return false; |
| 1963 | } |
| 1964 | const int32_t checked_offset32 = byte_buffer_offset + byte_index; |
| 1965 | |
| 1966 | int8_t* data; |
| 1967 | if (native_address == 0) { |
| 1968 | ObjPtr<ByteArray> heap_byte_array = byte_buffer->GetFieldObject<ByteArray>( |
| 1969 | GetMemberOffset(WellKnownClasses::java_nio_ByteBuffer_hb)); |
| 1970 | data = heap_byte_array->GetData(); |
| 1971 | } else { |
| 1972 | data = reinterpret_cast<int8_t*>(static_cast<uint32_t>(native_address)); |
| 1973 | } |
| 1974 | |
| 1975 | bool byte_swap = !GetNativeByteOrder(); |
| 1976 | switch (primitive_type) { |
| 1977 | case Primitive::kPrimChar: |
| 1978 | return ByteArrayViewAccessor<uint16_t>::Dispatch(access_mode, |
| 1979 | data, |
| 1980 | checked_offset32, |
| 1981 | byte_swap, |
| 1982 | &getter, |
| 1983 | result); |
| 1984 | case Primitive::kPrimShort: |
| 1985 | return ByteArrayViewAccessor<int16_t>::Dispatch(access_mode, |
| 1986 | data, |
| 1987 | checked_offset32, |
| 1988 | byte_swap, |
| 1989 | &getter, |
| 1990 | result); |
| 1991 | case Primitive::kPrimInt: |
| 1992 | return ByteArrayViewAccessor<int32_t>::Dispatch(access_mode, |
| 1993 | data, |
| 1994 | checked_offset32, |
| 1995 | byte_swap, |
| 1996 | &getter, |
| 1997 | result); |
| 1998 | case Primitive::kPrimFloat: |
| 1999 | // Treated as a bitwise representation. See javadoc comments for |
| 2000 | // java.lang.invoke.MethodHandles.byteArrayViewVarHandle(). |
| 2001 | return ByteArrayViewAccessor<int32_t>::Dispatch(access_mode, |
| 2002 | data, |
| 2003 | checked_offset32, |
| 2004 | byte_swap, |
| 2005 | &getter, |
| 2006 | result); |
| 2007 | case Primitive::kPrimLong: |
| 2008 | return ByteArrayViewAccessor<int64_t>::Dispatch(access_mode, |
| 2009 | data, |
| 2010 | checked_offset32, |
| 2011 | byte_swap, |
| 2012 | &getter, |
| 2013 | result); |
| 2014 | case Primitive::kPrimDouble: |
| 2015 | // Treated as a bitwise representation. See javadoc comments for |
| 2016 | // java.lang.invoke.MethodHandles.byteArrayViewVarHandle(). |
| 2017 | return ByteArrayViewAccessor<int64_t>::Dispatch(access_mode, |
| 2018 | data, |
| 2019 | checked_offset32, |
| 2020 | byte_swap, |
| 2021 | &getter, |
| 2022 | result); |
| 2023 | case Primitive::Type::kPrimNot: |
| 2024 | case Primitive::kPrimBoolean: |
| 2025 | case Primitive::kPrimByte: |
| 2026 | case Primitive::kPrimVoid: |
| 2027 | // These are not supported for byte array views and not instantiable. |
| 2028 | break; |
| 2029 | } |
| 2030 | LOG(FATAL) << "Unreachable: Unexpected primitive " << primitive_type; |
| 2031 | UNREACHABLE(); |
| 2032 | } |
| 2033 | |
Orion Hodson | 005ac51 | 2017-10-24 15:43:43 +0100 | [diff] [blame] | 2034 | } // namespace mirror |
| 2035 | } // namespace art |