Sebastien Hertz | 8ece050 | 2013-08-07 11:26:41 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 "interpreter_common.h" |
| 18 | |
| 19 | namespace art { |
| 20 | namespace interpreter { |
| 21 | |
| 22 | template<InvokeType type, bool is_range, bool do_access_check> |
| 23 | bool DoInvoke(Thread* self, ShadowFrame& shadow_frame, |
| 24 | const Instruction* inst, JValue* result) { |
| 25 | uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c(); |
| 26 | uint32_t vregC = (is_range) ? inst->VRegC_3rc() : inst->VRegC_35c(); |
| 27 | Object* receiver = (type == kStatic) ? NULL : shadow_frame.GetVRegReference(vregC); |
| 28 | ArtMethod* method = FindMethodFromCode(method_idx, receiver, shadow_frame.GetMethod(), self, |
| 29 | do_access_check, type); |
| 30 | if (UNLIKELY(method == NULL)) { |
| 31 | CHECK(self->IsExceptionPending()); |
| 32 | result->SetJ(0); |
| 33 | return false; |
| 34 | } else if (UNLIKELY(method->IsAbstract())) { |
| 35 | ThrowAbstractMethodError(method); |
| 36 | result->SetJ(0); |
| 37 | return false; |
| 38 | } |
| 39 | |
| 40 | MethodHelper mh(method); |
| 41 | const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| 42 | uint16_t num_regs; |
| 43 | uint16_t num_ins; |
| 44 | if (LIKELY(code_item != NULL)) { |
| 45 | num_regs = code_item->registers_size_; |
| 46 | num_ins = code_item->ins_size_; |
| 47 | } else { |
| 48 | DCHECK(method->IsNative() || method->IsProxyMethod()); |
| 49 | num_regs = num_ins = ArtMethod::NumArgRegisters(mh.GetShorty()); |
| 50 | if (!method->IsStatic()) { |
| 51 | num_regs++; |
| 52 | num_ins++; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | void* memory = alloca(ShadowFrame::ComputeSize(num_regs)); |
| 57 | ShadowFrame* new_shadow_frame(ShadowFrame::Create(num_regs, &shadow_frame, method, 0, memory)); |
| 58 | size_t cur_reg = num_regs - num_ins; |
| 59 | if (receiver != NULL) { |
| 60 | new_shadow_frame->SetVRegReference(cur_reg, receiver); |
| 61 | ++cur_reg; |
| 62 | } |
| 63 | |
| 64 | size_t arg_offset = (receiver == NULL) ? 0 : 1; |
| 65 | const char* shorty = mh.GetShorty(); |
| 66 | uint32_t arg[5]; |
| 67 | if (!is_range) { |
| 68 | inst->GetArgs(arg); |
| 69 | } |
| 70 | for (size_t shorty_pos = 0; cur_reg < num_regs; ++shorty_pos, cur_reg++, arg_offset++) { |
| 71 | DCHECK_LT(shorty_pos + 1, mh.GetShortyLength()); |
| 72 | size_t arg_pos = is_range ? vregC + arg_offset : arg[arg_offset]; |
| 73 | switch (shorty[shorty_pos + 1]) { |
| 74 | case 'L': { |
| 75 | Object* o = shadow_frame.GetVRegReference(arg_pos); |
| 76 | new_shadow_frame->SetVRegReference(cur_reg, o); |
| 77 | break; |
| 78 | } |
| 79 | case 'J': case 'D': { |
| 80 | uint64_t wide_value = (static_cast<uint64_t>(shadow_frame.GetVReg(arg_pos + 1)) << 32) | |
| 81 | static_cast<uint32_t>(shadow_frame.GetVReg(arg_pos)); |
| 82 | new_shadow_frame->SetVRegLong(cur_reg, wide_value); |
| 83 | cur_reg++; |
| 84 | arg_offset++; |
| 85 | break; |
| 86 | } |
| 87 | default: |
| 88 | new_shadow_frame->SetVReg(cur_reg, shadow_frame.GetVReg(arg_pos)); |
| 89 | break; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | if (LIKELY(Runtime::Current()->IsStarted())) { |
| 94 | (method->GetEntryPointFromInterpreter())(self, mh, code_item, new_shadow_frame, result); |
| 95 | } else { |
| 96 | UnstartedRuntimeInvoke(self, mh, code_item, new_shadow_frame, result, num_regs - num_ins); |
| 97 | } |
| 98 | return !self->IsExceptionPending(); |
| 99 | } |
| 100 | |
| 101 | template<bool is_range> |
| 102 | bool DoInvokeVirtualQuick(Thread* self, ShadowFrame& shadow_frame, |
| 103 | const Instruction* inst, JValue* result) { |
| 104 | uint32_t vregC = (is_range) ? inst->VRegC_3rc() : inst->VRegC_35c(); |
| 105 | Object* receiver = shadow_frame.GetVRegReference(vregC); |
| 106 | if (UNLIKELY(receiver == NULL)) { |
| 107 | // We lost the reference to the method index so we cannot get a more |
| 108 | // precised exception message. |
| 109 | ThrowNullPointerExceptionFromDexPC(shadow_frame.GetCurrentLocationForThrow()); |
| 110 | return false; |
| 111 | } |
| 112 | uint32_t vtable_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c(); |
| 113 | // TODO: use ObjectArray<T>::GetWithoutChecks ? |
| 114 | ArtMethod* method = receiver->GetClass()->GetVTable()->Get(vtable_idx); |
| 115 | if (UNLIKELY(method == NULL)) { |
| 116 | CHECK(self->IsExceptionPending()); |
| 117 | result->SetJ(0); |
| 118 | return false; |
| 119 | } else if (UNLIKELY(method->IsAbstract())) { |
| 120 | ThrowAbstractMethodError(method); |
| 121 | result->SetJ(0); |
| 122 | return false; |
| 123 | } |
| 124 | |
| 125 | MethodHelper mh(method); |
| 126 | const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| 127 | uint16_t num_regs; |
| 128 | uint16_t num_ins; |
| 129 | if (code_item != NULL) { |
| 130 | num_regs = code_item->registers_size_; |
| 131 | num_ins = code_item->ins_size_; |
| 132 | } else { |
| 133 | DCHECK(method->IsNative() || method->IsProxyMethod()); |
| 134 | num_regs = num_ins = ArtMethod::NumArgRegisters(mh.GetShorty()); |
| 135 | if (!method->IsStatic()) { |
| 136 | num_regs++; |
| 137 | num_ins++; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | void* memory = alloca(ShadowFrame::ComputeSize(num_regs)); |
| 142 | ShadowFrame* new_shadow_frame(ShadowFrame::Create(num_regs, &shadow_frame, |
| 143 | method, 0, memory)); |
| 144 | size_t cur_reg = num_regs - num_ins; |
| 145 | if (receiver != NULL) { |
| 146 | new_shadow_frame->SetVRegReference(cur_reg, receiver); |
| 147 | ++cur_reg; |
| 148 | } |
| 149 | |
| 150 | size_t arg_offset = (receiver == NULL) ? 0 : 1; |
| 151 | const char* shorty = mh.GetShorty(); |
| 152 | uint32_t arg[5]; |
| 153 | if (!is_range) { |
| 154 | inst->GetArgs(arg); |
| 155 | } |
| 156 | for (size_t shorty_pos = 0; cur_reg < num_regs; ++shorty_pos, cur_reg++, arg_offset++) { |
| 157 | DCHECK_LT(shorty_pos + 1, mh.GetShortyLength()); |
| 158 | size_t arg_pos = is_range ? vregC + arg_offset : arg[arg_offset]; |
| 159 | switch (shorty[shorty_pos + 1]) { |
| 160 | case 'L': { |
| 161 | Object* o = shadow_frame.GetVRegReference(arg_pos); |
| 162 | new_shadow_frame->SetVRegReference(cur_reg, o); |
| 163 | break; |
| 164 | } |
| 165 | case 'J': case 'D': { |
| 166 | uint64_t wide_value = (static_cast<uint64_t>(shadow_frame.GetVReg(arg_pos + 1)) << 32) | |
| 167 | static_cast<uint32_t>(shadow_frame.GetVReg(arg_pos)); |
| 168 | new_shadow_frame->SetVRegLong(cur_reg, wide_value); |
| 169 | cur_reg++; |
| 170 | arg_offset++; |
| 171 | break; |
| 172 | } |
| 173 | default: |
| 174 | new_shadow_frame->SetVReg(cur_reg, shadow_frame.GetVReg(arg_pos)); |
| 175 | break; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | if (LIKELY(Runtime::Current()->IsStarted())) { |
| 180 | (method->GetEntryPointFromInterpreter())(self, mh, code_item, new_shadow_frame, result); |
| 181 | } else { |
| 182 | UnstartedRuntimeInvoke(self, mh, code_item, new_shadow_frame, result, num_regs - num_ins); |
| 183 | } |
| 184 | return !self->IsExceptionPending(); |
| 185 | } |
| 186 | |
| 187 | template <bool is_range, bool do_access_check> |
| 188 | bool DoFilledNewArray(const Instruction* inst, const ShadowFrame& shadow_frame, |
| 189 | Thread* self, JValue* result) { |
| 190 | DCHECK(inst->Opcode() == Instruction::FILLED_NEW_ARRAY || |
| 191 | inst->Opcode() == Instruction::FILLED_NEW_ARRAY_RANGE); |
| 192 | const int32_t length = is_range ? inst->VRegA_3rc() : inst->VRegA_35c(); |
| 193 | if (!is_range) { |
| 194 | // Checks FILLED_NEW_ARRAY's length does not exceed 5 arguments. |
| 195 | CHECK_LE(length, 5); |
| 196 | } |
| 197 | if (UNLIKELY(length < 0)) { |
| 198 | ThrowNegativeArraySizeException(length); |
| 199 | return false; |
| 200 | } |
| 201 | uint16_t type_idx = is_range ? inst->VRegB_3rc() : inst->VRegB_35c(); |
| 202 | Class* arrayClass = ResolveVerifyAndClinit(type_idx, shadow_frame.GetMethod(), |
| 203 | self, false, do_access_check); |
| 204 | if (UNLIKELY(arrayClass == NULL)) { |
| 205 | DCHECK(self->IsExceptionPending()); |
| 206 | return false; |
| 207 | } |
| 208 | CHECK(arrayClass->IsArrayClass()); |
| 209 | Class* componentClass = arrayClass->GetComponentType(); |
| 210 | if (UNLIKELY(componentClass->IsPrimitive() && !componentClass->IsPrimitiveInt())) { |
| 211 | if (componentClass->IsPrimitiveLong() || componentClass->IsPrimitiveDouble()) { |
| 212 | ThrowRuntimeException("Bad filled array request for type %s", |
| 213 | PrettyDescriptor(componentClass).c_str()); |
| 214 | } else { |
| 215 | self->ThrowNewExceptionF(shadow_frame.GetCurrentLocationForThrow(), |
| 216 | "Ljava/lang/InternalError;", |
| 217 | "Found type %s; filled-new-array not implemented for anything but \'int\'", |
| 218 | PrettyDescriptor(componentClass).c_str()); |
| 219 | } |
| 220 | return false; |
| 221 | } |
| 222 | Object* newArray = Array::Alloc(self, arrayClass, length); |
| 223 | if (UNLIKELY(newArray == NULL)) { |
| 224 | DCHECK(self->IsExceptionPending()); |
| 225 | return false; |
| 226 | } |
| 227 | if (is_range) { |
| 228 | uint32_t vregC = inst->VRegC_3rc(); |
| 229 | const bool is_primitive_int_component = componentClass->IsPrimitiveInt(); |
| 230 | for (int32_t i = 0; i < length; ++i) { |
| 231 | if (is_primitive_int_component) { |
| 232 | newArray->AsIntArray()->Set(i, shadow_frame.GetVReg(vregC + i)); |
| 233 | } else { |
| 234 | newArray->AsObjectArray<Object>()->Set(i, shadow_frame.GetVRegReference(vregC + i)); |
| 235 | } |
| 236 | } |
| 237 | } else { |
| 238 | uint32_t arg[5]; |
| 239 | inst->GetArgs(arg); |
| 240 | const bool is_primitive_int_component = componentClass->IsPrimitiveInt(); |
| 241 | for (int32_t i = 0; i < length; ++i) { |
| 242 | if (is_primitive_int_component) { |
| 243 | newArray->AsIntArray()->Set(i, shadow_frame.GetVReg(arg[i])); |
| 244 | } else { |
| 245 | newArray->AsObjectArray<Object>()->Set(i, shadow_frame.GetVRegReference(arg[i])); |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | result->SetL(newArray); |
| 251 | return true; |
| 252 | } |
| 253 | |
| 254 | void UnstartedRuntimeInvoke(Thread* self, MethodHelper& mh, |
| 255 | const DexFile::CodeItem* code_item, ShadowFrame* shadow_frame, |
| 256 | JValue* result, size_t arg_offset) { |
| 257 | // In a runtime that's not started we intercept certain methods to avoid complicated dependency |
| 258 | // problems in core libraries. |
| 259 | std::string name(PrettyMethod(shadow_frame->GetMethod())); |
| 260 | if (name == "java.lang.Class java.lang.Class.forName(java.lang.String)") { |
| 261 | std::string descriptor(DotToDescriptor(shadow_frame->GetVRegReference(arg_offset)->AsString()->ToModifiedUtf8().c_str())); |
| 262 | ClassLoader* class_loader = NULL; // shadow_frame.GetMethod()->GetDeclaringClass()->GetClassLoader(); |
| 263 | Class* found = Runtime::Current()->GetClassLinker()->FindClass(descriptor.c_str(), |
| 264 | class_loader); |
| 265 | CHECK(found != NULL) << "Class.forName failed in un-started runtime for class: " |
| 266 | << PrettyDescriptor(descriptor); |
| 267 | result->SetL(found); |
| 268 | } else if (name == "java.lang.Object java.lang.Class.newInstance()") { |
| 269 | Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass(); |
| 270 | ArtMethod* c = klass->FindDeclaredDirectMethod("<init>", "()V"); |
| 271 | CHECK(c != NULL); |
| 272 | SirtRef<Object> obj(self, klass->AllocObject(self)); |
| 273 | CHECK(obj.get() != NULL); |
| 274 | EnterInterpreterFromInvoke(self, c, obj.get(), NULL, NULL); |
| 275 | result->SetL(obj.get()); |
| 276 | } else if (name == "java.lang.reflect.Field java.lang.Class.getDeclaredField(java.lang.String)") { |
| 277 | // Special managed code cut-out to allow field lookup in a un-started runtime that'd fail |
| 278 | // going the reflective Dex way. |
| 279 | Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass(); |
| 280 | String* name = shadow_frame->GetVRegReference(arg_offset + 1)->AsString(); |
| 281 | ArtField* found = NULL; |
| 282 | FieldHelper fh; |
| 283 | ObjectArray<ArtField>* fields = klass->GetIFields(); |
| 284 | for (int32_t i = 0; i < fields->GetLength() && found == NULL; ++i) { |
| 285 | ArtField* f = fields->Get(i); |
| 286 | fh.ChangeField(f); |
| 287 | if (name->Equals(fh.GetName())) { |
| 288 | found = f; |
| 289 | } |
| 290 | } |
| 291 | if (found == NULL) { |
| 292 | fields = klass->GetSFields(); |
| 293 | for (int32_t i = 0; i < fields->GetLength() && found == NULL; ++i) { |
| 294 | ArtField* f = fields->Get(i); |
| 295 | fh.ChangeField(f); |
| 296 | if (name->Equals(fh.GetName())) { |
| 297 | found = f; |
| 298 | } |
| 299 | } |
| 300 | } |
| 301 | CHECK(found != NULL) |
| 302 | << "Failed to find field in Class.getDeclaredField in un-started runtime. name=" |
| 303 | << name->ToModifiedUtf8() << " class=" << PrettyDescriptor(klass); |
| 304 | // TODO: getDeclaredField calls GetType once the field is found to ensure a |
| 305 | // NoClassDefFoundError is thrown if the field's type cannot be resolved. |
| 306 | Class* jlr_Field = self->DecodeJObject(WellKnownClasses::java_lang_reflect_Field)->AsClass(); |
| 307 | SirtRef<Object> field(self, jlr_Field->AllocObject(self)); |
| 308 | CHECK(field.get() != NULL); |
| 309 | ArtMethod* c = jlr_Field->FindDeclaredDirectMethod("<init>", "(Ljava/lang/reflect/ArtField;)V"); |
| 310 | uint32_t args[1]; |
| 311 | args[0] = reinterpret_cast<uint32_t>(found); |
| 312 | EnterInterpreterFromInvoke(self, c, field.get(), args, NULL); |
| 313 | result->SetL(field.get()); |
| 314 | } else if (name == "void java.lang.System.arraycopy(java.lang.Object, int, java.lang.Object, int, int)" || |
| 315 | name == "void java.lang.System.arraycopy(char[], int, char[], int, int)") { |
| 316 | // Special case array copying without initializing System. |
| 317 | Class* ctype = shadow_frame->GetVRegReference(arg_offset)->GetClass()->GetComponentType(); |
| 318 | jint srcPos = shadow_frame->GetVReg(arg_offset + 1); |
| 319 | jint dstPos = shadow_frame->GetVReg(arg_offset + 3); |
| 320 | jint length = shadow_frame->GetVReg(arg_offset + 4); |
| 321 | if (!ctype->IsPrimitive()) { |
| 322 | ObjectArray<Object>* src = shadow_frame->GetVRegReference(arg_offset)->AsObjectArray<Object>(); |
| 323 | ObjectArray<Object>* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsObjectArray<Object>(); |
| 324 | for (jint i = 0; i < length; ++i) { |
| 325 | dst->Set(dstPos + i, src->Get(srcPos + i)); |
| 326 | } |
| 327 | } else if (ctype->IsPrimitiveChar()) { |
| 328 | CharArray* src = shadow_frame->GetVRegReference(arg_offset)->AsCharArray(); |
| 329 | CharArray* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsCharArray(); |
| 330 | for (jint i = 0; i < length; ++i) { |
| 331 | dst->Set(dstPos + i, src->Get(srcPos + i)); |
| 332 | } |
| 333 | } else if (ctype->IsPrimitiveInt()) { |
| 334 | IntArray* src = shadow_frame->GetVRegReference(arg_offset)->AsIntArray(); |
| 335 | IntArray* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsIntArray(); |
| 336 | for (jint i = 0; i < length; ++i) { |
| 337 | dst->Set(dstPos + i, src->Get(srcPos + i)); |
| 338 | } |
| 339 | } else { |
| 340 | UNIMPLEMENTED(FATAL) << "System.arraycopy of unexpected type: " << PrettyDescriptor(ctype); |
| 341 | } |
| 342 | } else { |
| 343 | // Not special, continue with regular interpreter execution. |
| 344 | artInterpreterToInterpreterBridge(self, mh, code_item, shadow_frame, result); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | // Explicit DoInvoke template function declarations. |
| 349 | #define EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, _is_range_, _check) \ |
| 350 | template bool DoInvoke<_type, _is_range_, _check>(Thread* self, ShadowFrame& shadow_frame, \ |
| 351 | const Instruction* inst, JValue* result) |
| 352 | |
| 353 | #define EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS(_type) \ |
| 354 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, false, false); \ |
| 355 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, false, true); \ |
| 356 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, true, false); \ |
| 357 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, true, true) |
| 358 | |
| 359 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS(kStatic); |
| 360 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS(kDirect); |
| 361 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS(kVirtual); |
| 362 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS(kSuper); |
| 363 | EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS(kInterface); |
| 364 | |
| 365 | #undef EXPLICIT_DO_INVOKE_TEMPLATE_DECL_VARIANTS |
| 366 | #undef EXPLICIT_DO_INVOKE_TEMPLATE_DECL |
| 367 | |
| 368 | // Explicit DoInvokeVirtualQuick template function declarations. |
| 369 | #define EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL(_is_range) \ |
| 370 | template bool DoInvokeVirtualQuick<_is_range>(Thread* self, ShadowFrame& shadow_frame, \ |
| 371 | const Instruction* inst, JValue* result) |
| 372 | |
| 373 | EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL(false); |
| 374 | EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL(true); |
| 375 | #undef EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL |
| 376 | |
| 377 | // Explicit DoFilledNewArray template function declarations. |
| 378 | #define EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(_is_range_, _check) \ |
| 379 | template bool DoFilledNewArray<_is_range_, _check>(const Instruction* inst, \ |
| 380 | const ShadowFrame& shadow_frame, \ |
| 381 | Thread* self, JValue* result) |
| 382 | EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(false, false); |
| 383 | EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(false, true); |
| 384 | EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(true, false); |
| 385 | EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(true, true); |
| 386 | #undef EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL |
| 387 | |
| 388 | } // namespace interpreter |
| 389 | } // namespace art |