quick_trampoline_entrypoints.cc revision 6bc4374e3fa00e3ee5e832e1761c43e0b8a71558
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 "art_code.h" 18#include "art_method-inl.h" 19#include "callee_save_frame.h" 20#include "common_throws.h" 21#include "dex_file-inl.h" 22#include "dex_instruction-inl.h" 23#include "entrypoints/entrypoint_utils-inl.h" 24#include "entrypoints/runtime_asm_entrypoints.h" 25#include "gc/accounting/card_table-inl.h" 26#include "interpreter/interpreter.h" 27#include "method_reference.h" 28#include "mirror/class-inl.h" 29#include "mirror/dex_cache-inl.h" 30#include "mirror/method.h" 31#include "mirror/object-inl.h" 32#include "mirror/object_array-inl.h" 33#include "quick_exception_handler.h" 34#include "runtime.h" 35#include "scoped_thread_state_change.h" 36#include "stack.h" 37#include "debugger.h" 38 39namespace art { 40 41// Visits the arguments as saved to the stack by a Runtime::kRefAndArgs callee save frame. 42class QuickArgumentVisitor { 43 // Number of bytes for each out register in the caller method's frame. 44 static constexpr size_t kBytesStackArgLocation = 4; 45 // Frame size in bytes of a callee-save frame for RefsAndArgs. 46 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_FrameSize = 47 GetCalleeSaveFrameSize(kRuntimeISA, Runtime::kRefsAndArgs); 48#if defined(__arm__) 49 // The callee save frame is pointed to by SP. 50 // | argN | | 51 // | ... | | 52 // | arg4 | | 53 // | arg3 spill | | Caller's frame 54 // | arg2 spill | | 55 // | arg1 spill | | 56 // | Method* | --- 57 // | LR | 58 // | ... | 4x6 bytes callee saves 59 // | R3 | 60 // | R2 | 61 // | R1 | 62 // | S15 | 63 // | : | 64 // | S0 | 65 // | | 4x2 bytes padding 66 // | Method* | <- sp 67 static constexpr bool kSplitPairAcrossRegisterAndStack = kArm32QuickCodeUseSoftFloat; 68 static constexpr bool kAlignPairRegister = !kArm32QuickCodeUseSoftFloat; 69 static constexpr bool kQuickSoftFloatAbi = kArm32QuickCodeUseSoftFloat; 70 static constexpr bool kQuickDoubleRegAlignedFloatBackFilled = !kArm32QuickCodeUseSoftFloat; 71 static constexpr bool kQuickSkipOddFpRegisters = false; 72 static constexpr size_t kNumQuickGprArgs = 3; 73 static constexpr size_t kNumQuickFprArgs = kArm32QuickCodeUseSoftFloat ? 0 : 16; 74 static constexpr bool kGprFprLockstep = false; 75 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 76 arm::ArmCalleeSaveFpr1Offset(Runtime::kRefsAndArgs); // Offset of first FPR arg. 77 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 78 arm::ArmCalleeSaveGpr1Offset(Runtime::kRefsAndArgs); // Offset of first GPR arg. 79 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 80 arm::ArmCalleeSaveLrOffset(Runtime::kRefsAndArgs); // Offset of return address. 81 static size_t GprIndexToGprOffset(uint32_t gpr_index) { 82 return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA); 83 } 84#elif defined(__aarch64__) 85 // The callee save frame is pointed to by SP. 86 // | argN | | 87 // | ... | | 88 // | arg4 | | 89 // | arg3 spill | | Caller's frame 90 // | arg2 spill | | 91 // | arg1 spill | | 92 // | Method* | --- 93 // | LR | 94 // | X29 | 95 // | : | 96 // | X20 | 97 // | X7 | 98 // | : | 99 // | X1 | 100 // | D7 | 101 // | : | 102 // | D0 | 103 // | | padding 104 // | Method* | <- sp 105 static constexpr bool kSplitPairAcrossRegisterAndStack = false; 106 static constexpr bool kAlignPairRegister = false; 107 static constexpr bool kQuickSoftFloatAbi = false; // This is a hard float ABI. 108 static constexpr bool kQuickDoubleRegAlignedFloatBackFilled = false; 109 static constexpr bool kQuickSkipOddFpRegisters = false; 110 static constexpr size_t kNumQuickGprArgs = 7; // 7 arguments passed in GPRs. 111 static constexpr size_t kNumQuickFprArgs = 8; // 8 arguments passed in FPRs. 112 static constexpr bool kGprFprLockstep = false; 113 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 114 arm64::Arm64CalleeSaveFpr1Offset(Runtime::kRefsAndArgs); // Offset of first FPR arg. 115 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 116 arm64::Arm64CalleeSaveGpr1Offset(Runtime::kRefsAndArgs); // Offset of first GPR arg. 117 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 118 arm64::Arm64CalleeSaveLrOffset(Runtime::kRefsAndArgs); // Offset of return address. 119 static size_t GprIndexToGprOffset(uint32_t gpr_index) { 120 return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA); 121 } 122#elif defined(__mips__) && !defined(__LP64__) 123 // The callee save frame is pointed to by SP. 124 // | argN | | 125 // | ... | | 126 // | arg4 | | 127 // | arg3 spill | | Caller's frame 128 // | arg2 spill | | 129 // | arg1 spill | | 130 // | Method* | --- 131 // | RA | 132 // | ... | callee saves 133 // | A3 | arg3 134 // | A2 | arg2 135 // | A1 | arg1 136 // | F15 | 137 // | F14 | f_arg1 138 // | F13 | 139 // | F12 | f_arg0 140 // | | padding 141 // | A0/Method* | <- sp 142 static constexpr bool kSplitPairAcrossRegisterAndStack = false; 143 static constexpr bool kAlignPairRegister = true; 144 static constexpr bool kQuickSoftFloatAbi = false; 145 static constexpr bool kQuickDoubleRegAlignedFloatBackFilled = false; 146 static constexpr bool kQuickSkipOddFpRegisters = true; 147 static constexpr size_t kNumQuickGprArgs = 3; // 3 arguments passed in GPRs. 148 static constexpr size_t kNumQuickFprArgs = 4; // 2 arguments passed in FPRs. Floats can be passed 149 // only in even numbered registers and each double 150 // occupies two registers. 151 static constexpr bool kGprFprLockstep = false; 152 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 16; // Offset of first FPR arg. 153 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 32; // Offset of first GPR arg. 154 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 76; // Offset of return address. 155 static size_t GprIndexToGprOffset(uint32_t gpr_index) { 156 return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA); 157 } 158#elif defined(__mips__) && defined(__LP64__) 159 // The callee save frame is pointed to by SP. 160 // | argN | | 161 // | ... | | 162 // | arg4 | | 163 // | arg3 spill | | Caller's frame 164 // | arg2 spill | | 165 // | arg1 spill | | 166 // | Method* | --- 167 // | RA | 168 // | ... | callee saves 169 // | A7 | arg7 170 // | A6 | arg6 171 // | A5 | arg5 172 // | A4 | arg4 173 // | A3 | arg3 174 // | A2 | arg2 175 // | A1 | arg1 176 // | F19 | f_arg7 177 // | F18 | f_arg6 178 // | F17 | f_arg5 179 // | F16 | f_arg4 180 // | F15 | f_arg3 181 // | F14 | f_arg2 182 // | F13 | f_arg1 183 // | F12 | f_arg0 184 // | | padding 185 // | A0/Method* | <- sp 186 // NOTE: for Mip64, when A0 is skipped, F0 is also skipped. 187 static constexpr bool kSplitPairAcrossRegisterAndStack = false; 188 static constexpr bool kAlignPairRegister = false; 189 static constexpr bool kQuickSoftFloatAbi = false; 190 static constexpr bool kQuickDoubleRegAlignedFloatBackFilled = false; 191 static constexpr bool kQuickSkipOddFpRegisters = false; 192 static constexpr size_t kNumQuickGprArgs = 7; // 7 arguments passed in GPRs. 193 static constexpr size_t kNumQuickFprArgs = 7; // 7 arguments passed in FPRs. 194 static constexpr bool kGprFprLockstep = true; 195 196 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 24; // Offset of first FPR arg (F1). 197 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 80; // Offset of first GPR arg (A1). 198 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 200; // Offset of return address. 199 static size_t GprIndexToGprOffset(uint32_t gpr_index) { 200 return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA); 201 } 202#elif defined(__i386__) 203 // The callee save frame is pointed to by SP. 204 // | argN | | 205 // | ... | | 206 // | arg4 | | 207 // | arg3 spill | | Caller's frame 208 // | arg2 spill | | 209 // | arg1 spill | | 210 // | Method* | --- 211 // | Return | 212 // | EBP,ESI,EDI | callee saves 213 // | EBX | arg3 214 // | EDX | arg2 215 // | ECX | arg1 216 // | XMM3 | float arg 4 217 // | XMM2 | float arg 3 218 // | XMM1 | float arg 2 219 // | XMM0 | float arg 1 220 // | EAX/Method* | <- sp 221 static constexpr bool kSplitPairAcrossRegisterAndStack = false; 222 static constexpr bool kAlignPairRegister = false; 223 static constexpr bool kQuickSoftFloatAbi = false; // This is a hard float ABI. 224 static constexpr bool kQuickDoubleRegAlignedFloatBackFilled = false; 225 static constexpr bool kQuickSkipOddFpRegisters = false; 226 static constexpr size_t kNumQuickGprArgs = 3; // 3 arguments passed in GPRs. 227 static constexpr size_t kNumQuickFprArgs = 4; // 4 arguments passed in FPRs. 228 static constexpr bool kGprFprLockstep = false; 229 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 4; // Offset of first FPR arg. 230 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 4 + 4*8; // Offset of first GPR arg. 231 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 28 + 4*8; // Offset of return address. 232 static size_t GprIndexToGprOffset(uint32_t gpr_index) { 233 return gpr_index * GetBytesPerGprSpillLocation(kRuntimeISA); 234 } 235#elif defined(__x86_64__) 236 // The callee save frame is pointed to by SP. 237 // | argN | | 238 // | ... | | 239 // | reg. arg spills | | Caller's frame 240 // | Method* | --- 241 // | Return | 242 // | R15 | callee save 243 // | R14 | callee save 244 // | R13 | callee save 245 // | R12 | callee save 246 // | R9 | arg5 247 // | R8 | arg4 248 // | RSI/R6 | arg1 249 // | RBP/R5 | callee save 250 // | RBX/R3 | callee save 251 // | RDX/R2 | arg2 252 // | RCX/R1 | arg3 253 // | XMM7 | float arg 8 254 // | XMM6 | float arg 7 255 // | XMM5 | float arg 6 256 // | XMM4 | float arg 5 257 // | XMM3 | float arg 4 258 // | XMM2 | float arg 3 259 // | XMM1 | float arg 2 260 // | XMM0 | float arg 1 261 // | Padding | 262 // | RDI/Method* | <- sp 263 static constexpr bool kSplitPairAcrossRegisterAndStack = false; 264 static constexpr bool kAlignPairRegister = false; 265 static constexpr bool kQuickSoftFloatAbi = false; // This is a hard float ABI. 266 static constexpr bool kQuickDoubleRegAlignedFloatBackFilled = false; 267 static constexpr bool kQuickSkipOddFpRegisters = false; 268 static constexpr size_t kNumQuickGprArgs = 5; // 5 arguments passed in GPRs. 269 static constexpr size_t kNumQuickFprArgs = 8; // 8 arguments passed in FPRs. 270 static constexpr bool kGprFprLockstep = false; 271 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 16; // Offset of first FPR arg. 272 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 80 + 4*8; // Offset of first GPR arg. 273 static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 168 + 4*8; // Offset of return address. 274 static size_t GprIndexToGprOffset(uint32_t gpr_index) { 275 switch (gpr_index) { 276 case 0: return (4 * GetBytesPerGprSpillLocation(kRuntimeISA)); 277 case 1: return (1 * GetBytesPerGprSpillLocation(kRuntimeISA)); 278 case 2: return (0 * GetBytesPerGprSpillLocation(kRuntimeISA)); 279 case 3: return (5 * GetBytesPerGprSpillLocation(kRuntimeISA)); 280 case 4: return (6 * GetBytesPerGprSpillLocation(kRuntimeISA)); 281 default: 282 LOG(FATAL) << "Unexpected GPR index: " << gpr_index; 283 return 0; 284 } 285 } 286#else 287#error "Unsupported architecture" 288#endif 289 290 public: 291 // Special handling for proxy methods. Proxy methods are instance methods so the 292 // 'this' object is the 1st argument. They also have the same frame layout as the 293 // kRefAndArgs runtime method. Since 'this' is a reference, it is located in the 294 // 1st GPR. 295 static mirror::Object* GetProxyThisObject(ArtMethod** sp) 296 SHARED_REQUIRES(Locks::mutator_lock_) { 297 CHECK((*sp)->IsProxyMethod()); 298 CHECK_EQ(kQuickCalleeSaveFrame_RefAndArgs_FrameSize, 299 GetCallingCodeFrom(sp).GetFrameSizeInBytes()); 300 CHECK_GT(kNumQuickGprArgs, 0u); 301 constexpr uint32_t kThisGprIndex = 0u; // 'this' is in the 1st GPR. 302 size_t this_arg_offset = kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset + 303 GprIndexToGprOffset(kThisGprIndex); 304 uint8_t* this_arg_address = reinterpret_cast<uint8_t*>(sp) + this_arg_offset; 305 return reinterpret_cast<StackReference<mirror::Object>*>(this_arg_address)->AsMirrorPtr(); 306 } 307 308 static ArtMethod* GetCallingMethod(ArtMethod** sp) SHARED_REQUIRES(Locks::mutator_lock_) { 309 DCHECK((*sp)->IsCalleeSaveMethod()); 310 return GetCalleeSaveMethodCaller(sp, Runtime::kRefsAndArgs); 311 } 312 313 static ArtMethod* GetOuterMethod(ArtMethod** sp) SHARED_REQUIRES(Locks::mutator_lock_) { 314 DCHECK((*sp)->IsCalleeSaveMethod()); 315 uint8_t* previous_sp = 316 reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_FrameSize; 317 return *reinterpret_cast<ArtMethod**>(previous_sp); 318 } 319 320 static uint32_t GetCallingDexPc(ArtMethod** sp) SHARED_REQUIRES(Locks::mutator_lock_) { 321 DCHECK((*sp)->IsCalleeSaveMethod()); 322 const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA, Runtime::kRefsAndArgs); 323 ArtMethod** caller_sp = reinterpret_cast<ArtMethod**>( 324 reinterpret_cast<uintptr_t>(sp) + callee_frame_size); 325 uintptr_t outer_pc = QuickArgumentVisitor::GetCallingPc(sp); 326 uintptr_t outer_pc_offset = GetCallingCodeFrom(caller_sp).NativeQuickPcOffset(outer_pc); 327 328 if (GetCallingCodeFrom(caller_sp).IsOptimized(sizeof(void*))) { 329 CodeInfo code_info = GetCallingCodeFrom(caller_sp).GetOptimizedCodeInfo(); 330 StackMapEncoding encoding = code_info.ExtractEncoding(); 331 StackMap stack_map = code_info.GetStackMapForNativePcOffset(outer_pc_offset, encoding); 332 DCHECK(stack_map.IsValid()); 333 if (stack_map.HasInlineInfo(encoding)) { 334 InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding); 335 return inline_info.GetDexPcAtDepth(inline_info.GetDepth() - 1); 336 } else { 337 return stack_map.GetDexPc(encoding); 338 } 339 } else { 340 return GetCallingCodeFrom(caller_sp).ToDexPc(outer_pc); 341 } 342 } 343 344 // For the given quick ref and args quick frame, return the caller's PC. 345 static uintptr_t GetCallingPc(ArtMethod** sp) SHARED_REQUIRES(Locks::mutator_lock_) { 346 DCHECK((*sp)->IsCalleeSaveMethod()); 347 uint8_t* lr = reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_LrOffset; 348 return *reinterpret_cast<uintptr_t*>(lr); 349 } 350 351 QuickArgumentVisitor(ArtMethod** sp, bool is_static, const char* shorty, 352 uint32_t shorty_len) SHARED_REQUIRES(Locks::mutator_lock_) : 353 is_static_(is_static), shorty_(shorty), shorty_len_(shorty_len), 354 gpr_args_(reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset), 355 fpr_args_(reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset), 356 stack_args_(reinterpret_cast<uint8_t*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_FrameSize 357 + sizeof(ArtMethod*)), // Skip ArtMethod*. 358 gpr_index_(0), fpr_index_(0), fpr_double_index_(0), stack_index_(0), 359 cur_type_(Primitive::kPrimVoid), is_split_long_or_double_(false) { 360 static_assert(kQuickSoftFloatAbi == (kNumQuickFprArgs == 0), 361 "Number of Quick FPR arguments unexpected"); 362 static_assert(!(kQuickSoftFloatAbi && kQuickDoubleRegAlignedFloatBackFilled), 363 "Double alignment unexpected"); 364 // For register alignment, we want to assume that counters(fpr_double_index_) are even if the 365 // next register is even. 366 static_assert(!kQuickDoubleRegAlignedFloatBackFilled || kNumQuickFprArgs % 2 == 0, 367 "Number of Quick FPR arguments not even"); 368 DCHECK_EQ(Runtime::Current()->GetClassLinker()->GetImagePointerSize(), sizeof(void*)); 369 } 370 371 virtual ~QuickArgumentVisitor() {} 372 373 virtual void Visit() = 0; 374 375 Primitive::Type GetParamPrimitiveType() const { 376 return cur_type_; 377 } 378 379 uint8_t* GetParamAddress() const { 380 if (!kQuickSoftFloatAbi) { 381 Primitive::Type type = GetParamPrimitiveType(); 382 if (UNLIKELY((type == Primitive::kPrimDouble) || (type == Primitive::kPrimFloat))) { 383 if (type == Primitive::kPrimDouble && kQuickDoubleRegAlignedFloatBackFilled) { 384 if (fpr_double_index_ + 2 < kNumQuickFprArgs + 1) { 385 return fpr_args_ + (fpr_double_index_ * GetBytesPerFprSpillLocation(kRuntimeISA)); 386 } 387 } else if (fpr_index_ + 1 < kNumQuickFprArgs + 1) { 388 return fpr_args_ + (fpr_index_ * GetBytesPerFprSpillLocation(kRuntimeISA)); 389 } 390 return stack_args_ + (stack_index_ * kBytesStackArgLocation); 391 } 392 } 393 if (gpr_index_ < kNumQuickGprArgs) { 394 return gpr_args_ + GprIndexToGprOffset(gpr_index_); 395 } 396 return stack_args_ + (stack_index_ * kBytesStackArgLocation); 397 } 398 399 bool IsSplitLongOrDouble() const { 400 if ((GetBytesPerGprSpillLocation(kRuntimeISA) == 4) || 401 (GetBytesPerFprSpillLocation(kRuntimeISA) == 4)) { 402 return is_split_long_or_double_; 403 } else { 404 return false; // An optimization for when GPR and FPRs are 64bit. 405 } 406 } 407 408 bool IsParamAReference() const { 409 return GetParamPrimitiveType() == Primitive::kPrimNot; 410 } 411 412 bool IsParamALongOrDouble() const { 413 Primitive::Type type = GetParamPrimitiveType(); 414 return type == Primitive::kPrimLong || type == Primitive::kPrimDouble; 415 } 416 417 uint64_t ReadSplitLongParam() const { 418 // The splitted long is always available through the stack. 419 return *reinterpret_cast<uint64_t*>(stack_args_ 420 + stack_index_ * kBytesStackArgLocation); 421 } 422 423 void IncGprIndex() { 424 gpr_index_++; 425 if (kGprFprLockstep) { 426 fpr_index_++; 427 } 428 } 429 430 void IncFprIndex() { 431 fpr_index_++; 432 if (kGprFprLockstep) { 433 gpr_index_++; 434 } 435 } 436 437 void VisitArguments() SHARED_REQUIRES(Locks::mutator_lock_) { 438 // (a) 'stack_args_' should point to the first method's argument 439 // (b) whatever the argument type it is, the 'stack_index_' should 440 // be moved forward along with every visiting. 441 gpr_index_ = 0; 442 fpr_index_ = 0; 443 if (kQuickDoubleRegAlignedFloatBackFilled) { 444 fpr_double_index_ = 0; 445 } 446 stack_index_ = 0; 447 if (!is_static_) { // Handle this. 448 cur_type_ = Primitive::kPrimNot; 449 is_split_long_or_double_ = false; 450 Visit(); 451 stack_index_++; 452 if (kNumQuickGprArgs > 0) { 453 IncGprIndex(); 454 } 455 } 456 for (uint32_t shorty_index = 1; shorty_index < shorty_len_; ++shorty_index) { 457 cur_type_ = Primitive::GetType(shorty_[shorty_index]); 458 switch (cur_type_) { 459 case Primitive::kPrimNot: 460 case Primitive::kPrimBoolean: 461 case Primitive::kPrimByte: 462 case Primitive::kPrimChar: 463 case Primitive::kPrimShort: 464 case Primitive::kPrimInt: 465 is_split_long_or_double_ = false; 466 Visit(); 467 stack_index_++; 468 if (gpr_index_ < kNumQuickGprArgs) { 469 IncGprIndex(); 470 } 471 break; 472 case Primitive::kPrimFloat: 473 is_split_long_or_double_ = false; 474 Visit(); 475 stack_index_++; 476 if (kQuickSoftFloatAbi) { 477 if (gpr_index_ < kNumQuickGprArgs) { 478 IncGprIndex(); 479 } 480 } else { 481 if (fpr_index_ + 1 < kNumQuickFprArgs + 1) { 482 IncFprIndex(); 483 if (kQuickDoubleRegAlignedFloatBackFilled) { 484 // Double should not overlap with float. 485 // For example, if fpr_index_ = 3, fpr_double_index_ should be at least 4. 486 fpr_double_index_ = std::max(fpr_double_index_, RoundUp(fpr_index_, 2)); 487 // Float should not overlap with double. 488 if (fpr_index_ % 2 == 0) { 489 fpr_index_ = std::max(fpr_double_index_, fpr_index_); 490 } 491 } else if (kQuickSkipOddFpRegisters) { 492 IncFprIndex(); 493 } 494 } 495 } 496 break; 497 case Primitive::kPrimDouble: 498 case Primitive::kPrimLong: 499 if (kQuickSoftFloatAbi || (cur_type_ == Primitive::kPrimLong)) { 500 if (cur_type_ == Primitive::kPrimLong && kAlignPairRegister && gpr_index_ == 0) { 501 // Currently, this is only for ARM and MIPS, where the first available parameter 502 // register is R1 (on ARM) or A1 (on MIPS). So we skip it, and use R2 (on ARM) or 503 // A2 (on MIPS) instead. 504 IncGprIndex(); 505 } 506 is_split_long_or_double_ = (GetBytesPerGprSpillLocation(kRuntimeISA) == 4) && 507 ((gpr_index_ + 1) == kNumQuickGprArgs); 508 if (!kSplitPairAcrossRegisterAndStack && is_split_long_or_double_) { 509 // We don't want to split this. Pass over this register. 510 gpr_index_++; 511 is_split_long_or_double_ = false; 512 } 513 Visit(); 514 if (kBytesStackArgLocation == 4) { 515 stack_index_+= 2; 516 } else { 517 CHECK_EQ(kBytesStackArgLocation, 8U); 518 stack_index_++; 519 } 520 if (gpr_index_ < kNumQuickGprArgs) { 521 IncGprIndex(); 522 if (GetBytesPerGprSpillLocation(kRuntimeISA) == 4) { 523 if (gpr_index_ < kNumQuickGprArgs) { 524 IncGprIndex(); 525 } 526 } 527 } 528 } else { 529 is_split_long_or_double_ = (GetBytesPerFprSpillLocation(kRuntimeISA) == 4) && 530 ((fpr_index_ + 1) == kNumQuickFprArgs) && !kQuickDoubleRegAlignedFloatBackFilled; 531 Visit(); 532 if (kBytesStackArgLocation == 4) { 533 stack_index_+= 2; 534 } else { 535 CHECK_EQ(kBytesStackArgLocation, 8U); 536 stack_index_++; 537 } 538 if (kQuickDoubleRegAlignedFloatBackFilled) { 539 if (fpr_double_index_ + 2 < kNumQuickFprArgs + 1) { 540 fpr_double_index_ += 2; 541 // Float should not overlap with double. 542 if (fpr_index_ % 2 == 0) { 543 fpr_index_ = std::max(fpr_double_index_, fpr_index_); 544 } 545 } 546 } else if (fpr_index_ + 1 < kNumQuickFprArgs + 1) { 547 IncFprIndex(); 548 if (GetBytesPerFprSpillLocation(kRuntimeISA) == 4) { 549 if (fpr_index_ + 1 < kNumQuickFprArgs + 1) { 550 IncFprIndex(); 551 } 552 } 553 } 554 } 555 break; 556 default: 557 LOG(FATAL) << "Unexpected type: " << cur_type_ << " in " << shorty_; 558 } 559 } 560 } 561 562 protected: 563 const bool is_static_; 564 const char* const shorty_; 565 const uint32_t shorty_len_; 566 567 private: 568 uint8_t* const gpr_args_; // Address of GPR arguments in callee save frame. 569 uint8_t* const fpr_args_; // Address of FPR arguments in callee save frame. 570 uint8_t* const stack_args_; // Address of stack arguments in caller's frame. 571 uint32_t gpr_index_; // Index into spilled GPRs. 572 // Index into spilled FPRs. 573 // In case kQuickDoubleRegAlignedFloatBackFilled, it may index a hole while fpr_double_index_ 574 // holds a higher register number. 575 uint32_t fpr_index_; 576 // Index into spilled FPRs for aligned double. 577 // Only used when kQuickDoubleRegAlignedFloatBackFilled. Next available double register indexed in 578 // terms of singles, may be behind fpr_index. 579 uint32_t fpr_double_index_; 580 uint32_t stack_index_; // Index into arguments on the stack. 581 // The current type of argument during VisitArguments. 582 Primitive::Type cur_type_; 583 // Does a 64bit parameter straddle the register and stack arguments? 584 bool is_split_long_or_double_; 585}; 586 587// Returns the 'this' object of a proxy method. This function is only used by StackVisitor. It 588// allows to use the QuickArgumentVisitor constants without moving all the code in its own module. 589extern "C" mirror::Object* artQuickGetProxyThisObject(ArtMethod** sp) 590 SHARED_REQUIRES(Locks::mutator_lock_) { 591 return QuickArgumentVisitor::GetProxyThisObject(sp); 592} 593 594// Visits arguments on the stack placing them into the shadow frame. 595class BuildQuickShadowFrameVisitor FINAL : public QuickArgumentVisitor { 596 public: 597 BuildQuickShadowFrameVisitor(ArtMethod** sp, bool is_static, const char* shorty, 598 uint32_t shorty_len, ShadowFrame* sf, size_t first_arg_reg) : 599 QuickArgumentVisitor(sp, is_static, shorty, shorty_len), sf_(sf), cur_reg_(first_arg_reg) {} 600 601 void Visit() SHARED_REQUIRES(Locks::mutator_lock_) OVERRIDE; 602 603 private: 604 ShadowFrame* const sf_; 605 uint32_t cur_reg_; 606 607 DISALLOW_COPY_AND_ASSIGN(BuildQuickShadowFrameVisitor); 608}; 609 610void BuildQuickShadowFrameVisitor::Visit() { 611 Primitive::Type type = GetParamPrimitiveType(); 612 switch (type) { 613 case Primitive::kPrimLong: // Fall-through. 614 case Primitive::kPrimDouble: 615 if (IsSplitLongOrDouble()) { 616 sf_->SetVRegLong(cur_reg_, ReadSplitLongParam()); 617 } else { 618 sf_->SetVRegLong(cur_reg_, *reinterpret_cast<jlong*>(GetParamAddress())); 619 } 620 ++cur_reg_; 621 break; 622 case Primitive::kPrimNot: { 623 StackReference<mirror::Object>* stack_ref = 624 reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); 625 sf_->SetVRegReference(cur_reg_, stack_ref->AsMirrorPtr()); 626 } 627 break; 628 case Primitive::kPrimBoolean: // Fall-through. 629 case Primitive::kPrimByte: // Fall-through. 630 case Primitive::kPrimChar: // Fall-through. 631 case Primitive::kPrimShort: // Fall-through. 632 case Primitive::kPrimInt: // Fall-through. 633 case Primitive::kPrimFloat: 634 sf_->SetVReg(cur_reg_, *reinterpret_cast<jint*>(GetParamAddress())); 635 break; 636 case Primitive::kPrimVoid: 637 LOG(FATAL) << "UNREACHABLE"; 638 UNREACHABLE(); 639 } 640 ++cur_reg_; 641} 642 643extern "C" uint64_t artQuickToInterpreterBridge(ArtMethod* method, Thread* self, ArtMethod** sp) 644 SHARED_REQUIRES(Locks::mutator_lock_) { 645 // Ensure we don't get thread suspension until the object arguments are safely in the shadow 646 // frame. 647 ScopedQuickEntrypointChecks sqec(self); 648 649 if (method->IsAbstract()) { 650 ThrowAbstractMethodError(method); 651 return 0; 652 } 653 654 JValue tmp_value; 655 ShadowFrame* deopt_frame = self->PopStackedShadowFrame( 656 StackedShadowFrameType::kSingleFrameDeoptimizationShadowFrame, false); 657 const DexFile::CodeItem* code_item = method->GetCodeItem(); 658 DCHECK(code_item != nullptr) << PrettyMethod(method); 659 ManagedStack fragment; 660 661 DCHECK(!method->IsNative()) << PrettyMethod(method); 662 uint32_t shorty_len = 0; 663 auto* non_proxy_method = method->GetInterfaceMethodIfProxy(sizeof(void*)); 664 const char* shorty = non_proxy_method->GetShorty(&shorty_len); 665 666 JValue result; 667 668 if (deopt_frame != nullptr) { 669 // Coming from single-frame deopt. 670 671 if (kIsDebugBuild) { 672 // Sanity-check: are the methods as expected? We check that the last shadow frame (the bottom 673 // of the call-stack) corresponds to the called method. 674 ShadowFrame* linked = deopt_frame; 675 while (linked->GetLink() != nullptr) { 676 linked = linked->GetLink(); 677 } 678 CHECK_EQ(method, linked->GetMethod()) << PrettyMethod(method) << " " 679 << PrettyMethod(linked->GetMethod()); 680 } 681 682 if (VLOG_IS_ON(deopt)) { 683 // Print out the stack to verify that it was a single-frame deopt. 684 LOG(INFO) << "Continue-ing from deopt. Stack is:"; 685 QuickExceptionHandler::DumpFramesWithType(self, true); 686 } 687 688 mirror::Throwable* pending_exception = nullptr; 689 self->PopDeoptimizationContext(&result, &pending_exception); 690 691 // Push a transition back into managed code onto the linked list in thread. 692 self->PushManagedStackFragment(&fragment); 693 694 // Ensure that the stack is still in order. 695 if (kIsDebugBuild) { 696 class DummyStackVisitor : public StackVisitor { 697 public: 698 explicit DummyStackVisitor(Thread* self_in) SHARED_REQUIRES(Locks::mutator_lock_) 699 : StackVisitor(self_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames) {} 700 701 bool VisitFrame() OVERRIDE SHARED_REQUIRES(Locks::mutator_lock_) { 702 // Nothing to do here. In a debug build, SanityCheckFrame will do the work in the walking 703 // logic. Just always say we want to continue. 704 return true; 705 } 706 }; 707 DummyStackVisitor dsv(self); 708 dsv.WalkStack(); 709 } 710 711 // Restore the exception that was pending before deoptimization then interpret the 712 // deoptimized frames. 713 if (pending_exception != nullptr) { 714 self->SetException(pending_exception); 715 } 716 interpreter::EnterInterpreterFromDeoptimize(self, deopt_frame, &result); 717 } else { 718 const char* old_cause = self->StartAssertNoThreadSuspension( 719 "Building interpreter shadow frame"); 720 uint16_t num_regs = code_item->registers_size_; 721 // No last shadow coming from quick. 722 ShadowFrameAllocaUniquePtr shadow_frame_unique_ptr = 723 CREATE_SHADOW_FRAME(num_regs, /* link */ nullptr, method, /* dex pc */ 0); 724 ShadowFrame* shadow_frame = shadow_frame_unique_ptr.get(); 725 size_t first_arg_reg = code_item->registers_size_ - code_item->ins_size_; 726 BuildQuickShadowFrameVisitor shadow_frame_builder(sp, method->IsStatic(), shorty, shorty_len, 727 shadow_frame, first_arg_reg); 728 shadow_frame_builder.VisitArguments(); 729 const bool needs_initialization = 730 method->IsStatic() && !method->GetDeclaringClass()->IsInitialized(); 731 // Push a transition back into managed code onto the linked list in thread. 732 self->PushManagedStackFragment(&fragment); 733 self->PushShadowFrame(shadow_frame); 734 self->EndAssertNoThreadSuspension(old_cause); 735 736 if (needs_initialization) { 737 // Ensure static method's class is initialized. 738 StackHandleScope<1> hs(self); 739 Handle<mirror::Class> h_class(hs.NewHandle(shadow_frame->GetMethod()->GetDeclaringClass())); 740 if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) { 741 DCHECK(Thread::Current()->IsExceptionPending()) << PrettyMethod(shadow_frame->GetMethod()); 742 self->PopManagedStackFragment(fragment); 743 return 0; 744 } 745 } 746 747 result = interpreter::EnterInterpreterFromEntryPoint(self, code_item, shadow_frame); 748 } 749 750 // Pop transition. 751 self->PopManagedStackFragment(fragment); 752 753 // Request a stack deoptimization if needed 754 ArtMethod* caller = QuickArgumentVisitor::GetCallingMethod(sp); 755 if (UNLIKELY(Dbg::IsForcedInterpreterNeededForUpcall(self, caller))) { 756 // Push the context of the deoptimization stack so we can restore the return value and the 757 // exception before executing the deoptimized frames. 758 self->PushDeoptimizationContext(result, shorty[0] == 'L', self->GetException()); 759 760 // Set special exception to cause deoptimization. 761 self->SetException(Thread::GetDeoptimizationException()); 762 } 763 764 // No need to restore the args since the method has already been run by the interpreter. 765 return result.GetJ(); 766} 767 768// Visits arguments on the stack placing them into the args vector, Object* arguments are converted 769// to jobjects. 770class BuildQuickArgumentVisitor FINAL : public QuickArgumentVisitor { 771 public: 772 BuildQuickArgumentVisitor(ArtMethod** sp, bool is_static, const char* shorty, uint32_t shorty_len, 773 ScopedObjectAccessUnchecked* soa, std::vector<jvalue>* args) : 774 QuickArgumentVisitor(sp, is_static, shorty, shorty_len), soa_(soa), args_(args) {} 775 776 void Visit() SHARED_REQUIRES(Locks::mutator_lock_) OVERRIDE; 777 778 void FixupReferences() SHARED_REQUIRES(Locks::mutator_lock_); 779 780 private: 781 ScopedObjectAccessUnchecked* const soa_; 782 std::vector<jvalue>* const args_; 783 // References which we must update when exiting in case the GC moved the objects. 784 std::vector<std::pair<jobject, StackReference<mirror::Object>*>> references_; 785 786 DISALLOW_COPY_AND_ASSIGN(BuildQuickArgumentVisitor); 787}; 788 789void BuildQuickArgumentVisitor::Visit() { 790 jvalue val; 791 Primitive::Type type = GetParamPrimitiveType(); 792 switch (type) { 793 case Primitive::kPrimNot: { 794 StackReference<mirror::Object>* stack_ref = 795 reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); 796 val.l = soa_->AddLocalReference<jobject>(stack_ref->AsMirrorPtr()); 797 references_.push_back(std::make_pair(val.l, stack_ref)); 798 break; 799 } 800 case Primitive::kPrimLong: // Fall-through. 801 case Primitive::kPrimDouble: 802 if (IsSplitLongOrDouble()) { 803 val.j = ReadSplitLongParam(); 804 } else { 805 val.j = *reinterpret_cast<jlong*>(GetParamAddress()); 806 } 807 break; 808 case Primitive::kPrimBoolean: // Fall-through. 809 case Primitive::kPrimByte: // Fall-through. 810 case Primitive::kPrimChar: // Fall-through. 811 case Primitive::kPrimShort: // Fall-through. 812 case Primitive::kPrimInt: // Fall-through. 813 case Primitive::kPrimFloat: 814 val.i = *reinterpret_cast<jint*>(GetParamAddress()); 815 break; 816 case Primitive::kPrimVoid: 817 LOG(FATAL) << "UNREACHABLE"; 818 UNREACHABLE(); 819 } 820 args_->push_back(val); 821} 822 823void BuildQuickArgumentVisitor::FixupReferences() { 824 // Fixup any references which may have changed. 825 for (const auto& pair : references_) { 826 pair.second->Assign(soa_->Decode<mirror::Object*>(pair.first)); 827 soa_->Env()->DeleteLocalRef(pair.first); 828 } 829} 830 831// Handler for invocation on proxy methods. On entry a frame will exist for the proxy object method 832// which is responsible for recording callee save registers. We explicitly place into jobjects the 833// incoming reference arguments (so they survive GC). We invoke the invocation handler, which is a 834// field within the proxy object, which will box the primitive arguments and deal with error cases. 835extern "C" uint64_t artQuickProxyInvokeHandler( 836 ArtMethod* proxy_method, mirror::Object* receiver, Thread* self, ArtMethod** sp) 837 SHARED_REQUIRES(Locks::mutator_lock_) { 838 DCHECK(proxy_method->IsProxyMethod()) << PrettyMethod(proxy_method); 839 DCHECK(receiver->GetClass()->IsProxyClass()) << PrettyMethod(proxy_method); 840 // Ensure we don't get thread suspension until the object arguments are safely in jobjects. 841 const char* old_cause = 842 self->StartAssertNoThreadSuspension("Adding to IRT proxy object arguments"); 843 // Register the top of the managed stack, making stack crawlable. 844 DCHECK_EQ((*sp), proxy_method) << PrettyMethod(proxy_method); 845 DCHECK_EQ(GetCallingCodeFrom(sp).GetFrameSizeInBytes(), 846 ArtCode(Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs)) 847 .GetFrameSizeInBytes()) 848 << PrettyMethod(proxy_method); 849 self->VerifyStack(); 850 // Start new JNI local reference state. 851 JNIEnvExt* env = self->GetJniEnv(); 852 ScopedObjectAccessUnchecked soa(env); 853 ScopedJniEnvLocalRefState env_state(env); 854 // Create local ref. copies of proxy method and the receiver. 855 jobject rcvr_jobj = soa.AddLocalReference<jobject>(receiver); 856 857 // Placing arguments into args vector and remove the receiver. 858 ArtMethod* non_proxy_method = proxy_method->GetInterfaceMethodIfProxy(sizeof(void*)); 859 CHECK(!non_proxy_method->IsStatic()) << PrettyMethod(proxy_method) << " " 860 << PrettyMethod(non_proxy_method); 861 std::vector<jvalue> args; 862 uint32_t shorty_len = 0; 863 const char* shorty = non_proxy_method->GetShorty(&shorty_len); 864 BuildQuickArgumentVisitor local_ref_visitor(sp, false, shorty, shorty_len, &soa, &args); 865 866 local_ref_visitor.VisitArguments(); 867 DCHECK_GT(args.size(), 0U) << PrettyMethod(proxy_method); 868 args.erase(args.begin()); 869 870 // Convert proxy method into expected interface method. 871 ArtMethod* interface_method = proxy_method->FindOverriddenMethod(sizeof(void*)); 872 DCHECK(interface_method != nullptr) << PrettyMethod(proxy_method); 873 DCHECK(!interface_method->IsProxyMethod()) << PrettyMethod(interface_method); 874 self->EndAssertNoThreadSuspension(old_cause); 875 jobject interface_method_jobj = soa.AddLocalReference<jobject>( 876 mirror::Method::CreateFromArtMethod(soa.Self(), interface_method)); 877 878 // All naked Object*s should now be in jobjects, so its safe to go into the main invoke code 879 // that performs allocations. 880 JValue result = InvokeProxyInvocationHandler(soa, shorty, rcvr_jobj, interface_method_jobj, args); 881 // Restore references which might have moved. 882 local_ref_visitor.FixupReferences(); 883 return result.GetJ(); 884} 885 886// Read object references held in arguments from quick frames and place in a JNI local references, 887// so they don't get garbage collected. 888class RememberForGcArgumentVisitor FINAL : public QuickArgumentVisitor { 889 public: 890 RememberForGcArgumentVisitor(ArtMethod** sp, bool is_static, const char* shorty, 891 uint32_t shorty_len, ScopedObjectAccessUnchecked* soa) : 892 QuickArgumentVisitor(sp, is_static, shorty, shorty_len), soa_(soa) {} 893 894 void Visit() SHARED_REQUIRES(Locks::mutator_lock_) OVERRIDE; 895 896 void FixupReferences() SHARED_REQUIRES(Locks::mutator_lock_); 897 898 private: 899 ScopedObjectAccessUnchecked* const soa_; 900 // References which we must update when exiting in case the GC moved the objects. 901 std::vector<std::pair<jobject, StackReference<mirror::Object>*> > references_; 902 903 DISALLOW_COPY_AND_ASSIGN(RememberForGcArgumentVisitor); 904}; 905 906void RememberForGcArgumentVisitor::Visit() { 907 if (IsParamAReference()) { 908 StackReference<mirror::Object>* stack_ref = 909 reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); 910 jobject reference = 911 soa_->AddLocalReference<jobject>(stack_ref->AsMirrorPtr()); 912 references_.push_back(std::make_pair(reference, stack_ref)); 913 } 914} 915 916void RememberForGcArgumentVisitor::FixupReferences() { 917 // Fixup any references which may have changed. 918 for (const auto& pair : references_) { 919 pair.second->Assign(soa_->Decode<mirror::Object*>(pair.first)); 920 soa_->Env()->DeleteLocalRef(pair.first); 921 } 922} 923 924// Lazily resolve a method for quick. Called by stub code. 925extern "C" const void* artQuickResolutionTrampoline( 926 ArtMethod* called, mirror::Object* receiver, Thread* self, ArtMethod** sp) 927 SHARED_REQUIRES(Locks::mutator_lock_) { 928 // The resolution trampoline stashes the resolved method into the callee-save frame to transport 929 // it. Thus, when exiting, the stack cannot be verified (as the resolved method most likely 930 // does not have the same stack layout as the callee-save method). 931 ScopedQuickEntrypointChecks sqec(self, kIsDebugBuild, false); 932 // Start new JNI local reference state 933 JNIEnvExt* env = self->GetJniEnv(); 934 ScopedObjectAccessUnchecked soa(env); 935 ScopedJniEnvLocalRefState env_state(env); 936 const char* old_cause = self->StartAssertNoThreadSuspension("Quick method resolution set up"); 937 938 // Compute details about the called method (avoid GCs) 939 ClassLinker* linker = Runtime::Current()->GetClassLinker(); 940 InvokeType invoke_type; 941 MethodReference called_method(nullptr, 0); 942 const bool called_method_known_on_entry = !called->IsRuntimeMethod(); 943 ArtMethod* caller = nullptr; 944 if (!called_method_known_on_entry) { 945 caller = QuickArgumentVisitor::GetCallingMethod(sp); 946 uint32_t dex_pc = QuickArgumentVisitor::GetCallingDexPc(sp); 947 const DexFile::CodeItem* code; 948 called_method.dex_file = caller->GetDexFile(); 949 code = caller->GetCodeItem(); 950 CHECK_LT(dex_pc, code->insns_size_in_code_units_); 951 const Instruction* instr = Instruction::At(&code->insns_[dex_pc]); 952 Instruction::Code instr_code = instr->Opcode(); 953 bool is_range; 954 switch (instr_code) { 955 case Instruction::INVOKE_DIRECT: 956 invoke_type = kDirect; 957 is_range = false; 958 break; 959 case Instruction::INVOKE_DIRECT_RANGE: 960 invoke_type = kDirect; 961 is_range = true; 962 break; 963 case Instruction::INVOKE_STATIC: 964 invoke_type = kStatic; 965 is_range = false; 966 break; 967 case Instruction::INVOKE_STATIC_RANGE: 968 invoke_type = kStatic; 969 is_range = true; 970 break; 971 case Instruction::INVOKE_SUPER: 972 invoke_type = kSuper; 973 is_range = false; 974 break; 975 case Instruction::INVOKE_SUPER_RANGE: 976 invoke_type = kSuper; 977 is_range = true; 978 break; 979 case Instruction::INVOKE_VIRTUAL: 980 invoke_type = kVirtual; 981 is_range = false; 982 break; 983 case Instruction::INVOKE_VIRTUAL_RANGE: 984 invoke_type = kVirtual; 985 is_range = true; 986 break; 987 case Instruction::INVOKE_INTERFACE: 988 invoke_type = kInterface; 989 is_range = false; 990 break; 991 case Instruction::INVOKE_INTERFACE_RANGE: 992 invoke_type = kInterface; 993 is_range = true; 994 break; 995 default: 996 LOG(FATAL) << "Unexpected call into trampoline: " << instr->DumpString(nullptr); 997 UNREACHABLE(); 998 } 999 called_method.dex_method_index = (is_range) ? instr->VRegB_3rc() : instr->VRegB_35c(); 1000 } else { 1001 invoke_type = kStatic; 1002 called_method.dex_file = called->GetDexFile(); 1003 called_method.dex_method_index = called->GetDexMethodIndex(); 1004 } 1005 uint32_t shorty_len; 1006 const char* shorty = 1007 called_method.dex_file->GetMethodShorty( 1008 called_method.dex_file->GetMethodId(called_method.dex_method_index), &shorty_len); 1009 RememberForGcArgumentVisitor visitor(sp, invoke_type == kStatic, shorty, shorty_len, &soa); 1010 visitor.VisitArguments(); 1011 self->EndAssertNoThreadSuspension(old_cause); 1012 const bool virtual_or_interface = invoke_type == kVirtual || invoke_type == kInterface; 1013 // Resolve method filling in dex cache. 1014 if (!called_method_known_on_entry) { 1015 StackHandleScope<1> hs(self); 1016 mirror::Object* dummy = nullptr; 1017 HandleWrapper<mirror::Object> h_receiver( 1018 hs.NewHandleWrapper(virtual_or_interface ? &receiver : &dummy)); 1019 DCHECK_EQ(caller->GetDexFile(), called_method.dex_file); 1020 called = linker->ResolveMethod(self, called_method.dex_method_index, caller, invoke_type); 1021 } 1022 const void* code = nullptr; 1023 if (LIKELY(!self->IsExceptionPending())) { 1024 // Incompatible class change should have been handled in resolve method. 1025 CHECK(!called->CheckIncompatibleClassChange(invoke_type)) 1026 << PrettyMethod(called) << " " << invoke_type; 1027 if (virtual_or_interface) { 1028 // Refine called method based on receiver. 1029 CHECK(receiver != nullptr) << invoke_type; 1030 1031 ArtMethod* orig_called = called; 1032 if (invoke_type == kVirtual) { 1033 called = receiver->GetClass()->FindVirtualMethodForVirtual(called, sizeof(void*)); 1034 } else { 1035 called = receiver->GetClass()->FindVirtualMethodForInterface(called, sizeof(void*)); 1036 } 1037 1038 CHECK(called != nullptr) << PrettyMethod(orig_called) << " " 1039 << PrettyTypeOf(receiver) << " " 1040 << invoke_type << " " << orig_called->GetVtableIndex(); 1041 1042 // We came here because of sharpening. Ensure the dex cache is up-to-date on the method index 1043 // of the sharpened method avoiding dirtying the dex cache if possible. 1044 // Note, called_method.dex_method_index references the dex method before the 1045 // FindVirtualMethodFor... This is ok for FindDexMethodIndexInOtherDexFile that only cares 1046 // about the name and signature. 1047 uint32_t update_dex_cache_method_index = called->GetDexMethodIndex(); 1048 if (!called->HasSameDexCacheResolvedMethods(caller, sizeof(void*))) { 1049 // Calling from one dex file to another, need to compute the method index appropriate to 1050 // the caller's dex file. Since we get here only if the original called was a runtime 1051 // method, we've got the correct dex_file and a dex_method_idx from above. 1052 DCHECK(!called_method_known_on_entry); 1053 DCHECK_EQ(caller->GetDexFile(), called_method.dex_file); 1054 const DexFile* caller_dex_file = called_method.dex_file; 1055 uint32_t caller_method_name_and_sig_index = called_method.dex_method_index; 1056 update_dex_cache_method_index = 1057 called->FindDexMethodIndexInOtherDexFile(*caller_dex_file, 1058 caller_method_name_and_sig_index); 1059 } 1060 if ((update_dex_cache_method_index != DexFile::kDexNoIndex) && 1061 (caller->GetDexCacheResolvedMethod( 1062 update_dex_cache_method_index, sizeof(void*)) != called)) { 1063 caller->SetDexCacheResolvedMethod(update_dex_cache_method_index, called, sizeof(void*)); 1064 } 1065 } else if (invoke_type == kStatic) { 1066 const auto called_dex_method_idx = called->GetDexMethodIndex(); 1067 // For static invokes, we may dispatch to the static method in the superclass but resolve 1068 // using the subclass. To prevent getting slow paths on each invoke, we force set the 1069 // resolved method for the super class dex method index if we are in the same dex file. 1070 // b/19175856 1071 if (called->GetDexFile() == called_method.dex_file && 1072 called_method.dex_method_index != called_dex_method_idx) { 1073 called->GetDexCache()->SetResolvedMethod(called_dex_method_idx, called, sizeof(void*)); 1074 } 1075 } 1076 1077 // Ensure that the called method's class is initialized. 1078 StackHandleScope<1> hs(soa.Self()); 1079 Handle<mirror::Class> called_class(hs.NewHandle(called->GetDeclaringClass())); 1080 linker->EnsureInitialized(soa.Self(), called_class, true, true); 1081 if (LIKELY(called_class->IsInitialized())) { 1082 if (UNLIKELY(Dbg::IsForcedInterpreterNeededForResolution(self, called))) { 1083 // If we are single-stepping or the called method is deoptimized (by a 1084 // breakpoint, for example), then we have to execute the called method 1085 // with the interpreter. 1086 code = GetQuickToInterpreterBridge(); 1087 } else if (UNLIKELY(Dbg::IsForcedInstrumentationNeededForResolution(self, caller))) { 1088 // If the caller is deoptimized (by a breakpoint, for example), we have to 1089 // continue its execution with interpreter when returning from the called 1090 // method. Because we do not want to execute the called method with the 1091 // interpreter, we wrap its execution into the instrumentation stubs. 1092 // When the called method returns, it will execute the instrumentation 1093 // exit hook that will determine the need of the interpreter with a call 1094 // to Dbg::IsForcedInterpreterNeededForUpcall and deoptimize the stack if 1095 // it is needed. 1096 code = GetQuickInstrumentationEntryPoint(); 1097 } else { 1098 code = called->GetEntryPointFromQuickCompiledCode(); 1099 } 1100 } else if (called_class->IsInitializing()) { 1101 if (UNLIKELY(Dbg::IsForcedInterpreterNeededForResolution(self, called))) { 1102 // If we are single-stepping or the called method is deoptimized (by a 1103 // breakpoint, for example), then we have to execute the called method 1104 // with the interpreter. 1105 code = GetQuickToInterpreterBridge(); 1106 } else if (invoke_type == kStatic) { 1107 // Class is still initializing, go to oat and grab code (trampoline must be left in place 1108 // until class is initialized to stop races between threads). 1109 code = linker->GetQuickOatCodeFor(called); 1110 } else { 1111 // No trampoline for non-static methods. 1112 code = called->GetEntryPointFromQuickCompiledCode(); 1113 } 1114 } else { 1115 DCHECK(called_class->IsErroneous()); 1116 } 1117 } 1118 CHECK_EQ(code == nullptr, self->IsExceptionPending()); 1119 // Fixup any locally saved objects may have moved during a GC. 1120 visitor.FixupReferences(); 1121 // Place called method in callee-save frame to be placed as first argument to quick method. 1122 *sp = called; 1123 1124 return code; 1125} 1126 1127/* 1128 * This class uses a couple of observations to unite the different calling conventions through 1129 * a few constants. 1130 * 1131 * 1) Number of registers used for passing is normally even, so counting down has no penalty for 1132 * possible alignment. 1133 * 2) Known 64b architectures store 8B units on the stack, both for integral and floating point 1134 * types, so using uintptr_t is OK. Also means that we can use kRegistersNeededX to denote 1135 * when we have to split things 1136 * 3) The only soft-float, Arm, is 32b, so no widening needs to be taken into account for floats 1137 * and we can use Int handling directly. 1138 * 4) Only 64b architectures widen, and their stack is aligned 8B anyways, so no padding code 1139 * necessary when widening. Also, widening of Ints will take place implicitly, and the 1140 * extension should be compatible with Aarch64, which mandates copying the available bits 1141 * into LSB and leaving the rest unspecified. 1142 * 5) Aligning longs and doubles is necessary on arm only, and it's the same in registers and on 1143 * the stack. 1144 * 6) There is only little endian. 1145 * 1146 * 1147 * Actual work is supposed to be done in a delegate of the template type. The interface is as 1148 * follows: 1149 * 1150 * void PushGpr(uintptr_t): Add a value for the next GPR 1151 * 1152 * void PushFpr4(float): Add a value for the next FPR of size 32b. Is only called if we need 1153 * padding, that is, think the architecture is 32b and aligns 64b. 1154 * 1155 * void PushFpr8(uint64_t): Push a double. We _will_ call this on 32b, it's the callee's job to 1156 * split this if necessary. The current state will have aligned, if 1157 * necessary. 1158 * 1159 * void PushStack(uintptr_t): Push a value to the stack. 1160 * 1161 * uintptr_t PushHandleScope(mirror::Object* ref): Add a reference to the HandleScope. This _will_ have nullptr, 1162 * as this might be important for null initialization. 1163 * Must return the jobject, that is, the reference to the 1164 * entry in the HandleScope (nullptr if necessary). 1165 * 1166 */ 1167template<class T> class BuildNativeCallFrameStateMachine { 1168 public: 1169#if defined(__arm__) 1170 // TODO: These are all dummy values! 1171 static constexpr bool kNativeSoftFloatAbi = true; 1172 static constexpr size_t kNumNativeGprArgs = 4; // 4 arguments passed in GPRs, r0-r3 1173 static constexpr size_t kNumNativeFprArgs = 0; // 0 arguments passed in FPRs. 1174 1175 static constexpr size_t kRegistersNeededForLong = 2; 1176 static constexpr size_t kRegistersNeededForDouble = 2; 1177 static constexpr bool kMultiRegistersAligned = true; 1178 static constexpr bool kMultiFPRegistersWidened = false; 1179 static constexpr bool kMultiGPRegistersWidened = false; 1180 static constexpr bool kAlignLongOnStack = true; 1181 static constexpr bool kAlignDoubleOnStack = true; 1182#elif defined(__aarch64__) 1183 static constexpr bool kNativeSoftFloatAbi = false; // This is a hard float ABI. 1184 static constexpr size_t kNumNativeGprArgs = 8; // 6 arguments passed in GPRs. 1185 static constexpr size_t kNumNativeFprArgs = 8; // 8 arguments passed in FPRs. 1186 1187 static constexpr size_t kRegistersNeededForLong = 1; 1188 static constexpr size_t kRegistersNeededForDouble = 1; 1189 static constexpr bool kMultiRegistersAligned = false; 1190 static constexpr bool kMultiFPRegistersWidened = false; 1191 static constexpr bool kMultiGPRegistersWidened = false; 1192 static constexpr bool kAlignLongOnStack = false; 1193 static constexpr bool kAlignDoubleOnStack = false; 1194#elif defined(__mips__) && !defined(__LP64__) 1195 static constexpr bool kNativeSoftFloatAbi = true; // This is a hard float ABI. 1196 static constexpr size_t kNumNativeGprArgs = 4; // 4 arguments passed in GPRs. 1197 static constexpr size_t kNumNativeFprArgs = 0; // 0 arguments passed in FPRs. 1198 1199 static constexpr size_t kRegistersNeededForLong = 2; 1200 static constexpr size_t kRegistersNeededForDouble = 2; 1201 static constexpr bool kMultiRegistersAligned = true; 1202 static constexpr bool kMultiFPRegistersWidened = true; 1203 static constexpr bool kMultiGPRegistersWidened = false; 1204 static constexpr bool kAlignLongOnStack = true; 1205 static constexpr bool kAlignDoubleOnStack = true; 1206#elif defined(__mips__) && defined(__LP64__) 1207 // Let the code prepare GPRs only and we will load the FPRs with same data. 1208 static constexpr bool kNativeSoftFloatAbi = true; 1209 static constexpr size_t kNumNativeGprArgs = 8; 1210 static constexpr size_t kNumNativeFprArgs = 0; 1211 1212 static constexpr size_t kRegistersNeededForLong = 1; 1213 static constexpr size_t kRegistersNeededForDouble = 1; 1214 static constexpr bool kMultiRegistersAligned = false; 1215 static constexpr bool kMultiFPRegistersWidened = false; 1216 static constexpr bool kMultiGPRegistersWidened = true; 1217 static constexpr bool kAlignLongOnStack = false; 1218 static constexpr bool kAlignDoubleOnStack = false; 1219#elif defined(__i386__) 1220 // TODO: Check these! 1221 static constexpr bool kNativeSoftFloatAbi = false; // Not using int registers for fp 1222 static constexpr size_t kNumNativeGprArgs = 0; // 6 arguments passed in GPRs. 1223 static constexpr size_t kNumNativeFprArgs = 0; // 8 arguments passed in FPRs. 1224 1225 static constexpr size_t kRegistersNeededForLong = 2; 1226 static constexpr size_t kRegistersNeededForDouble = 2; 1227 static constexpr bool kMultiRegistersAligned = false; // x86 not using regs, anyways 1228 static constexpr bool kMultiFPRegistersWidened = false; 1229 static constexpr bool kMultiGPRegistersWidened = false; 1230 static constexpr bool kAlignLongOnStack = false; 1231 static constexpr bool kAlignDoubleOnStack = false; 1232#elif defined(__x86_64__) 1233 static constexpr bool kNativeSoftFloatAbi = false; // This is a hard float ABI. 1234 static constexpr size_t kNumNativeGprArgs = 6; // 6 arguments passed in GPRs. 1235 static constexpr size_t kNumNativeFprArgs = 8; // 8 arguments passed in FPRs. 1236 1237 static constexpr size_t kRegistersNeededForLong = 1; 1238 static constexpr size_t kRegistersNeededForDouble = 1; 1239 static constexpr bool kMultiRegistersAligned = false; 1240 static constexpr bool kMultiFPRegistersWidened = false; 1241 static constexpr bool kMultiGPRegistersWidened = false; 1242 static constexpr bool kAlignLongOnStack = false; 1243 static constexpr bool kAlignDoubleOnStack = false; 1244#else 1245#error "Unsupported architecture" 1246#endif 1247 1248 public: 1249 explicit BuildNativeCallFrameStateMachine(T* delegate) 1250 : gpr_index_(kNumNativeGprArgs), 1251 fpr_index_(kNumNativeFprArgs), 1252 stack_entries_(0), 1253 delegate_(delegate) { 1254 // For register alignment, we want to assume that counters (gpr_index_, fpr_index_) are even iff 1255 // the next register is even; counting down is just to make the compiler happy... 1256 static_assert(kNumNativeGprArgs % 2 == 0U, "Number of native GPR arguments not even"); 1257 static_assert(kNumNativeFprArgs % 2 == 0U, "Number of native FPR arguments not even"); 1258 } 1259 1260 virtual ~BuildNativeCallFrameStateMachine() {} 1261 1262 bool HavePointerGpr() const { 1263 return gpr_index_ > 0; 1264 } 1265 1266 void AdvancePointer(const void* val) { 1267 if (HavePointerGpr()) { 1268 gpr_index_--; 1269 PushGpr(reinterpret_cast<uintptr_t>(val)); 1270 } else { 1271 stack_entries_++; // TODO: have a field for pointer length as multiple of 32b 1272 PushStack(reinterpret_cast<uintptr_t>(val)); 1273 gpr_index_ = 0; 1274 } 1275 } 1276 1277 bool HaveHandleScopeGpr() const { 1278 return gpr_index_ > 0; 1279 } 1280 1281 void AdvanceHandleScope(mirror::Object* ptr) SHARED_REQUIRES(Locks::mutator_lock_) { 1282 uintptr_t handle = PushHandle(ptr); 1283 if (HaveHandleScopeGpr()) { 1284 gpr_index_--; 1285 PushGpr(handle); 1286 } else { 1287 stack_entries_++; 1288 PushStack(handle); 1289 gpr_index_ = 0; 1290 } 1291 } 1292 1293 bool HaveIntGpr() const { 1294 return gpr_index_ > 0; 1295 } 1296 1297 void AdvanceInt(uint32_t val) { 1298 if (HaveIntGpr()) { 1299 gpr_index_--; 1300 if (kMultiGPRegistersWidened) { 1301 DCHECK_EQ(sizeof(uintptr_t), sizeof(int64_t)); 1302 PushGpr(static_cast<int64_t>(bit_cast<int32_t, uint32_t>(val))); 1303 } else { 1304 PushGpr(val); 1305 } 1306 } else { 1307 stack_entries_++; 1308 if (kMultiGPRegistersWidened) { 1309 DCHECK_EQ(sizeof(uintptr_t), sizeof(int64_t)); 1310 PushStack(static_cast<int64_t>(bit_cast<int32_t, uint32_t>(val))); 1311 } else { 1312 PushStack(val); 1313 } 1314 gpr_index_ = 0; 1315 } 1316 } 1317 1318 bool HaveLongGpr() const { 1319 return gpr_index_ >= kRegistersNeededForLong + (LongGprNeedsPadding() ? 1 : 0); 1320 } 1321 1322 bool LongGprNeedsPadding() const { 1323 return kRegistersNeededForLong > 1 && // only pad when using multiple registers 1324 kAlignLongOnStack && // and when it needs alignment 1325 (gpr_index_ & 1) == 1; // counter is odd, see constructor 1326 } 1327 1328 bool LongStackNeedsPadding() const { 1329 return kRegistersNeededForLong > 1 && // only pad when using multiple registers 1330 kAlignLongOnStack && // and when it needs 8B alignment 1331 (stack_entries_ & 1) == 1; // counter is odd 1332 } 1333 1334 void AdvanceLong(uint64_t val) { 1335 if (HaveLongGpr()) { 1336 if (LongGprNeedsPadding()) { 1337 PushGpr(0); 1338 gpr_index_--; 1339 } 1340 if (kRegistersNeededForLong == 1) { 1341 PushGpr(static_cast<uintptr_t>(val)); 1342 } else { 1343 PushGpr(static_cast<uintptr_t>(val & 0xFFFFFFFF)); 1344 PushGpr(static_cast<uintptr_t>((val >> 32) & 0xFFFFFFFF)); 1345 } 1346 gpr_index_ -= kRegistersNeededForLong; 1347 } else { 1348 if (LongStackNeedsPadding()) { 1349 PushStack(0); 1350 stack_entries_++; 1351 } 1352 if (kRegistersNeededForLong == 1) { 1353 PushStack(static_cast<uintptr_t>(val)); 1354 stack_entries_++; 1355 } else { 1356 PushStack(static_cast<uintptr_t>(val & 0xFFFFFFFF)); 1357 PushStack(static_cast<uintptr_t>((val >> 32) & 0xFFFFFFFF)); 1358 stack_entries_ += 2; 1359 } 1360 gpr_index_ = 0; 1361 } 1362 } 1363 1364 bool HaveFloatFpr() const { 1365 return fpr_index_ > 0; 1366 } 1367 1368 void AdvanceFloat(float val) { 1369 if (kNativeSoftFloatAbi) { 1370 AdvanceInt(bit_cast<uint32_t, float>(val)); 1371 } else { 1372 if (HaveFloatFpr()) { 1373 fpr_index_--; 1374 if (kRegistersNeededForDouble == 1) { 1375 if (kMultiFPRegistersWidened) { 1376 PushFpr8(bit_cast<uint64_t, double>(val)); 1377 } else { 1378 // No widening, just use the bits. 1379 PushFpr8(static_cast<uint64_t>(bit_cast<uint32_t, float>(val))); 1380 } 1381 } else { 1382 PushFpr4(val); 1383 } 1384 } else { 1385 stack_entries_++; 1386 if (kRegistersNeededForDouble == 1 && kMultiFPRegistersWidened) { 1387 // Need to widen before storing: Note the "double" in the template instantiation. 1388 // Note: We need to jump through those hoops to make the compiler happy. 1389 DCHECK_EQ(sizeof(uintptr_t), sizeof(uint64_t)); 1390 PushStack(static_cast<uintptr_t>(bit_cast<uint64_t, double>(val))); 1391 } else { 1392 PushStack(static_cast<uintptr_t>(bit_cast<uint32_t, float>(val))); 1393 } 1394 fpr_index_ = 0; 1395 } 1396 } 1397 } 1398 1399 bool HaveDoubleFpr() const { 1400 return fpr_index_ >= kRegistersNeededForDouble + (DoubleFprNeedsPadding() ? 1 : 0); 1401 } 1402 1403 bool DoubleFprNeedsPadding() const { 1404 return kRegistersNeededForDouble > 1 && // only pad when using multiple registers 1405 kAlignDoubleOnStack && // and when it needs alignment 1406 (fpr_index_ & 1) == 1; // counter is odd, see constructor 1407 } 1408 1409 bool DoubleStackNeedsPadding() const { 1410 return kRegistersNeededForDouble > 1 && // only pad when using multiple registers 1411 kAlignDoubleOnStack && // and when it needs 8B alignment 1412 (stack_entries_ & 1) == 1; // counter is odd 1413 } 1414 1415 void AdvanceDouble(uint64_t val) { 1416 if (kNativeSoftFloatAbi) { 1417 AdvanceLong(val); 1418 } else { 1419 if (HaveDoubleFpr()) { 1420 if (DoubleFprNeedsPadding()) { 1421 PushFpr4(0); 1422 fpr_index_--; 1423 } 1424 PushFpr8(val); 1425 fpr_index_ -= kRegistersNeededForDouble; 1426 } else { 1427 if (DoubleStackNeedsPadding()) { 1428 PushStack(0); 1429 stack_entries_++; 1430 } 1431 if (kRegistersNeededForDouble == 1) { 1432 PushStack(static_cast<uintptr_t>(val)); 1433 stack_entries_++; 1434 } else { 1435 PushStack(static_cast<uintptr_t>(val & 0xFFFFFFFF)); 1436 PushStack(static_cast<uintptr_t>((val >> 32) & 0xFFFFFFFF)); 1437 stack_entries_ += 2; 1438 } 1439 fpr_index_ = 0; 1440 } 1441 } 1442 } 1443 1444 uint32_t GetStackEntries() const { 1445 return stack_entries_; 1446 } 1447 1448 uint32_t GetNumberOfUsedGprs() const { 1449 return kNumNativeGprArgs - gpr_index_; 1450 } 1451 1452 uint32_t GetNumberOfUsedFprs() const { 1453 return kNumNativeFprArgs - fpr_index_; 1454 } 1455 1456 private: 1457 void PushGpr(uintptr_t val) { 1458 delegate_->PushGpr(val); 1459 } 1460 void PushFpr4(float val) { 1461 delegate_->PushFpr4(val); 1462 } 1463 void PushFpr8(uint64_t val) { 1464 delegate_->PushFpr8(val); 1465 } 1466 void PushStack(uintptr_t val) { 1467 delegate_->PushStack(val); 1468 } 1469 uintptr_t PushHandle(mirror::Object* ref) SHARED_REQUIRES(Locks::mutator_lock_) { 1470 return delegate_->PushHandle(ref); 1471 } 1472 1473 uint32_t gpr_index_; // Number of free GPRs 1474 uint32_t fpr_index_; // Number of free FPRs 1475 uint32_t stack_entries_; // Stack entries are in multiples of 32b, as floats are usually not 1476 // extended 1477 T* const delegate_; // What Push implementation gets called 1478}; 1479 1480// Computes the sizes of register stacks and call stack area. Handling of references can be extended 1481// in subclasses. 1482// 1483// To handle native pointers, use "L" in the shorty for an object reference, which simulates 1484// them with handles. 1485class ComputeNativeCallFrameSize { 1486 public: 1487 ComputeNativeCallFrameSize() : num_stack_entries_(0) {} 1488 1489 virtual ~ComputeNativeCallFrameSize() {} 1490 1491 uint32_t GetStackSize() const { 1492 return num_stack_entries_ * sizeof(uintptr_t); 1493 } 1494 1495 uint8_t* LayoutCallStack(uint8_t* sp8) const { 1496 sp8 -= GetStackSize(); 1497 // Align by kStackAlignment. 1498 sp8 = reinterpret_cast<uint8_t*>(RoundDown(reinterpret_cast<uintptr_t>(sp8), kStackAlignment)); 1499 return sp8; 1500 } 1501 1502 uint8_t* LayoutCallRegisterStacks(uint8_t* sp8, uintptr_t** start_gpr, uint32_t** start_fpr) 1503 const { 1504 // Assumption is OK right now, as we have soft-float arm 1505 size_t fregs = BuildNativeCallFrameStateMachine<ComputeNativeCallFrameSize>::kNumNativeFprArgs; 1506 sp8 -= fregs * sizeof(uintptr_t); 1507 *start_fpr = reinterpret_cast<uint32_t*>(sp8); 1508 size_t iregs = BuildNativeCallFrameStateMachine<ComputeNativeCallFrameSize>::kNumNativeGprArgs; 1509 sp8 -= iregs * sizeof(uintptr_t); 1510 *start_gpr = reinterpret_cast<uintptr_t*>(sp8); 1511 return sp8; 1512 } 1513 1514 uint8_t* LayoutNativeCall(uint8_t* sp8, uintptr_t** start_stack, uintptr_t** start_gpr, 1515 uint32_t** start_fpr) const { 1516 // Native call stack. 1517 sp8 = LayoutCallStack(sp8); 1518 *start_stack = reinterpret_cast<uintptr_t*>(sp8); 1519 1520 // Put fprs and gprs below. 1521 sp8 = LayoutCallRegisterStacks(sp8, start_gpr, start_fpr); 1522 1523 // Return the new bottom. 1524 return sp8; 1525 } 1526 1527 virtual void WalkHeader(BuildNativeCallFrameStateMachine<ComputeNativeCallFrameSize>* sm) 1528 SHARED_REQUIRES(Locks::mutator_lock_) { 1529 UNUSED(sm); 1530 } 1531 1532 void Walk(const char* shorty, uint32_t shorty_len) SHARED_REQUIRES(Locks::mutator_lock_) { 1533 BuildNativeCallFrameStateMachine<ComputeNativeCallFrameSize> sm(this); 1534 1535 WalkHeader(&sm); 1536 1537 for (uint32_t i = 1; i < shorty_len; ++i) { 1538 Primitive::Type cur_type_ = Primitive::GetType(shorty[i]); 1539 switch (cur_type_) { 1540 case Primitive::kPrimNot: 1541 // TODO: fix abuse of mirror types. 1542 sm.AdvanceHandleScope( 1543 reinterpret_cast<mirror::Object*>(0x12345678)); 1544 break; 1545 1546 case Primitive::kPrimBoolean: 1547 case Primitive::kPrimByte: 1548 case Primitive::kPrimChar: 1549 case Primitive::kPrimShort: 1550 case Primitive::kPrimInt: 1551 sm.AdvanceInt(0); 1552 break; 1553 case Primitive::kPrimFloat: 1554 sm.AdvanceFloat(0); 1555 break; 1556 case Primitive::kPrimDouble: 1557 sm.AdvanceDouble(0); 1558 break; 1559 case Primitive::kPrimLong: 1560 sm.AdvanceLong(0); 1561 break; 1562 default: 1563 LOG(FATAL) << "Unexpected type: " << cur_type_ << " in " << shorty; 1564 UNREACHABLE(); 1565 } 1566 } 1567 1568 num_stack_entries_ = sm.GetStackEntries(); 1569 } 1570 1571 void PushGpr(uintptr_t /* val */) { 1572 // not optimizing registers, yet 1573 } 1574 1575 void PushFpr4(float /* val */) { 1576 // not optimizing registers, yet 1577 } 1578 1579 void PushFpr8(uint64_t /* val */) { 1580 // not optimizing registers, yet 1581 } 1582 1583 void PushStack(uintptr_t /* val */) { 1584 // counting is already done in the superclass 1585 } 1586 1587 virtual uintptr_t PushHandle(mirror::Object* /* ptr */) { 1588 return reinterpret_cast<uintptr_t>(nullptr); 1589 } 1590 1591 protected: 1592 uint32_t num_stack_entries_; 1593}; 1594 1595class ComputeGenericJniFrameSize FINAL : public ComputeNativeCallFrameSize { 1596 public: 1597 ComputeGenericJniFrameSize() : num_handle_scope_references_(0) {} 1598 1599 // Lays out the callee-save frame. Assumes that the incorrect frame corresponding to RefsAndArgs 1600 // is at *m = sp. Will update to point to the bottom of the save frame. 1601 // 1602 // Note: assumes ComputeAll() has been run before. 1603 void LayoutCalleeSaveFrame(Thread* self, ArtMethod*** m, void* sp, HandleScope** handle_scope) 1604 SHARED_REQUIRES(Locks::mutator_lock_) { 1605 ArtMethod* method = **m; 1606 1607 DCHECK_EQ(Runtime::Current()->GetClassLinker()->GetImagePointerSize(), sizeof(void*)); 1608 1609 uint8_t* sp8 = reinterpret_cast<uint8_t*>(sp); 1610 1611 // First, fix up the layout of the callee-save frame. 1612 // We have to squeeze in the HandleScope, and relocate the method pointer. 1613 1614 // "Free" the slot for the method. 1615 sp8 += sizeof(void*); // In the callee-save frame we use a full pointer. 1616 1617 // Under the callee saves put handle scope and new method stack reference. 1618 size_t handle_scope_size = HandleScope::SizeOf(num_handle_scope_references_); 1619 size_t scope_and_method = handle_scope_size + sizeof(ArtMethod*); 1620 1621 sp8 -= scope_and_method; 1622 // Align by kStackAlignment. 1623 sp8 = reinterpret_cast<uint8_t*>(RoundDown(reinterpret_cast<uintptr_t>(sp8), kStackAlignment)); 1624 1625 uint8_t* sp8_table = sp8 + sizeof(ArtMethod*); 1626 *handle_scope = HandleScope::Create(sp8_table, self->GetTopHandleScope(), 1627 num_handle_scope_references_); 1628 1629 // Add a slot for the method pointer, and fill it. Fix the pointer-pointer given to us. 1630 uint8_t* method_pointer = sp8; 1631 auto** new_method_ref = reinterpret_cast<ArtMethod**>(method_pointer); 1632 *new_method_ref = method; 1633 *m = new_method_ref; 1634 } 1635 1636 // Adds space for the cookie. Note: may leave stack unaligned. 1637 void LayoutCookie(uint8_t** sp) const { 1638 // Reference cookie and padding 1639 *sp -= 8; 1640 } 1641 1642 // Re-layout the callee-save frame (insert a handle-scope). Then add space for the cookie. 1643 // Returns the new bottom. Note: this may be unaligned. 1644 uint8_t* LayoutJNISaveFrame(Thread* self, ArtMethod*** m, void* sp, HandleScope** handle_scope) 1645 SHARED_REQUIRES(Locks::mutator_lock_) { 1646 // First, fix up the layout of the callee-save frame. 1647 // We have to squeeze in the HandleScope, and relocate the method pointer. 1648 LayoutCalleeSaveFrame(self, m, sp, handle_scope); 1649 1650 // The bottom of the callee-save frame is now where the method is, *m. 1651 uint8_t* sp8 = reinterpret_cast<uint8_t*>(*m); 1652 1653 // Add space for cookie. 1654 LayoutCookie(&sp8); 1655 1656 return sp8; 1657 } 1658 1659 // WARNING: After this, *sp won't be pointing to the method anymore! 1660 uint8_t* ComputeLayout(Thread* self, ArtMethod*** m, const char* shorty, uint32_t shorty_len, 1661 HandleScope** handle_scope, uintptr_t** start_stack, uintptr_t** start_gpr, 1662 uint32_t** start_fpr) 1663 SHARED_REQUIRES(Locks::mutator_lock_) { 1664 Walk(shorty, shorty_len); 1665 1666 // JNI part. 1667 uint8_t* sp8 = LayoutJNISaveFrame(self, m, reinterpret_cast<void*>(*m), handle_scope); 1668 1669 sp8 = LayoutNativeCall(sp8, start_stack, start_gpr, start_fpr); 1670 1671 // Return the new bottom. 1672 return sp8; 1673 } 1674 1675 uintptr_t PushHandle(mirror::Object* /* ptr */) OVERRIDE; 1676 1677 // Add JNIEnv* and jobj/jclass before the shorty-derived elements. 1678 void WalkHeader(BuildNativeCallFrameStateMachine<ComputeNativeCallFrameSize>* sm) OVERRIDE 1679 SHARED_REQUIRES(Locks::mutator_lock_); 1680 1681 private: 1682 uint32_t num_handle_scope_references_; 1683}; 1684 1685uintptr_t ComputeGenericJniFrameSize::PushHandle(mirror::Object* /* ptr */) { 1686 num_handle_scope_references_++; 1687 return reinterpret_cast<uintptr_t>(nullptr); 1688} 1689 1690void ComputeGenericJniFrameSize::WalkHeader( 1691 BuildNativeCallFrameStateMachine<ComputeNativeCallFrameSize>* sm) { 1692 // JNIEnv 1693 sm->AdvancePointer(nullptr); 1694 1695 // Class object or this as first argument 1696 sm->AdvanceHandleScope(reinterpret_cast<mirror::Object*>(0x12345678)); 1697} 1698 1699// Class to push values to three separate regions. Used to fill the native call part. Adheres to 1700// the template requirements of BuildGenericJniFrameStateMachine. 1701class FillNativeCall { 1702 public: 1703 FillNativeCall(uintptr_t* gpr_regs, uint32_t* fpr_regs, uintptr_t* stack_args) : 1704 cur_gpr_reg_(gpr_regs), cur_fpr_reg_(fpr_regs), cur_stack_arg_(stack_args) {} 1705 1706 virtual ~FillNativeCall() {} 1707 1708 void Reset(uintptr_t* gpr_regs, uint32_t* fpr_regs, uintptr_t* stack_args) { 1709 cur_gpr_reg_ = gpr_regs; 1710 cur_fpr_reg_ = fpr_regs; 1711 cur_stack_arg_ = stack_args; 1712 } 1713 1714 void PushGpr(uintptr_t val) { 1715 *cur_gpr_reg_ = val; 1716 cur_gpr_reg_++; 1717 } 1718 1719 void PushFpr4(float val) { 1720 *cur_fpr_reg_ = val; 1721 cur_fpr_reg_++; 1722 } 1723 1724 void PushFpr8(uint64_t val) { 1725 uint64_t* tmp = reinterpret_cast<uint64_t*>(cur_fpr_reg_); 1726 *tmp = val; 1727 cur_fpr_reg_ += 2; 1728 } 1729 1730 void PushStack(uintptr_t val) { 1731 *cur_stack_arg_ = val; 1732 cur_stack_arg_++; 1733 } 1734 1735 virtual uintptr_t PushHandle(mirror::Object*) SHARED_REQUIRES(Locks::mutator_lock_) { 1736 LOG(FATAL) << "(Non-JNI) Native call does not use handles."; 1737 UNREACHABLE(); 1738 } 1739 1740 private: 1741 uintptr_t* cur_gpr_reg_; 1742 uint32_t* cur_fpr_reg_; 1743 uintptr_t* cur_stack_arg_; 1744}; 1745 1746// Visits arguments on the stack placing them into a region lower down the stack for the benefit 1747// of transitioning into native code. 1748class BuildGenericJniFrameVisitor FINAL : public QuickArgumentVisitor { 1749 public: 1750 BuildGenericJniFrameVisitor(Thread* self, bool is_static, const char* shorty, uint32_t shorty_len, 1751 ArtMethod*** sp) 1752 : QuickArgumentVisitor(*sp, is_static, shorty, shorty_len), 1753 jni_call_(nullptr, nullptr, nullptr, nullptr), sm_(&jni_call_) { 1754 ComputeGenericJniFrameSize fsc; 1755 uintptr_t* start_gpr_reg; 1756 uint32_t* start_fpr_reg; 1757 uintptr_t* start_stack_arg; 1758 bottom_of_used_area_ = fsc.ComputeLayout(self, sp, shorty, shorty_len, 1759 &handle_scope_, 1760 &start_stack_arg, 1761 &start_gpr_reg, &start_fpr_reg); 1762 1763 jni_call_.Reset(start_gpr_reg, start_fpr_reg, start_stack_arg, handle_scope_); 1764 1765 // jni environment is always first argument 1766 sm_.AdvancePointer(self->GetJniEnv()); 1767 1768 if (is_static) { 1769 sm_.AdvanceHandleScope((**sp)->GetDeclaringClass()); 1770 } 1771 } 1772 1773 void Visit() SHARED_REQUIRES(Locks::mutator_lock_) OVERRIDE; 1774 1775 void FinalizeHandleScope(Thread* self) SHARED_REQUIRES(Locks::mutator_lock_); 1776 1777 StackReference<mirror::Object>* GetFirstHandleScopeEntry() 1778 SHARED_REQUIRES(Locks::mutator_lock_) { 1779 return handle_scope_->GetHandle(0).GetReference(); 1780 } 1781 1782 jobject GetFirstHandleScopeJObject() const SHARED_REQUIRES(Locks::mutator_lock_) { 1783 return handle_scope_->GetHandle(0).ToJObject(); 1784 } 1785 1786 void* GetBottomOfUsedArea() const { 1787 return bottom_of_used_area_; 1788 } 1789 1790 private: 1791 // A class to fill a JNI call. Adds reference/handle-scope management to FillNativeCall. 1792 class FillJniCall FINAL : public FillNativeCall { 1793 public: 1794 FillJniCall(uintptr_t* gpr_regs, uint32_t* fpr_regs, uintptr_t* stack_args, 1795 HandleScope* handle_scope) : FillNativeCall(gpr_regs, fpr_regs, stack_args), 1796 handle_scope_(handle_scope), cur_entry_(0) {} 1797 1798 uintptr_t PushHandle(mirror::Object* ref) OVERRIDE SHARED_REQUIRES(Locks::mutator_lock_); 1799 1800 void Reset(uintptr_t* gpr_regs, uint32_t* fpr_regs, uintptr_t* stack_args, HandleScope* scope) { 1801 FillNativeCall::Reset(gpr_regs, fpr_regs, stack_args); 1802 handle_scope_ = scope; 1803 cur_entry_ = 0U; 1804 } 1805 1806 void ResetRemainingScopeSlots() SHARED_REQUIRES(Locks::mutator_lock_) { 1807 // Initialize padding entries. 1808 size_t expected_slots = handle_scope_->NumberOfReferences(); 1809 while (cur_entry_ < expected_slots) { 1810 handle_scope_->GetMutableHandle(cur_entry_++).Assign(nullptr); 1811 } 1812 DCHECK_NE(cur_entry_, 0U); 1813 } 1814 1815 private: 1816 HandleScope* handle_scope_; 1817 size_t cur_entry_; 1818 }; 1819 1820 HandleScope* handle_scope_; 1821 FillJniCall jni_call_; 1822 void* bottom_of_used_area_; 1823 1824 BuildNativeCallFrameStateMachine<FillJniCall> sm_; 1825 1826 DISALLOW_COPY_AND_ASSIGN(BuildGenericJniFrameVisitor); 1827}; 1828 1829uintptr_t BuildGenericJniFrameVisitor::FillJniCall::PushHandle(mirror::Object* ref) { 1830 uintptr_t tmp; 1831 MutableHandle<mirror::Object> h = handle_scope_->GetMutableHandle(cur_entry_); 1832 h.Assign(ref); 1833 tmp = reinterpret_cast<uintptr_t>(h.ToJObject()); 1834 cur_entry_++; 1835 return tmp; 1836} 1837 1838void BuildGenericJniFrameVisitor::Visit() { 1839 Primitive::Type type = GetParamPrimitiveType(); 1840 switch (type) { 1841 case Primitive::kPrimLong: { 1842 jlong long_arg; 1843 if (IsSplitLongOrDouble()) { 1844 long_arg = ReadSplitLongParam(); 1845 } else { 1846 long_arg = *reinterpret_cast<jlong*>(GetParamAddress()); 1847 } 1848 sm_.AdvanceLong(long_arg); 1849 break; 1850 } 1851 case Primitive::kPrimDouble: { 1852 uint64_t double_arg; 1853 if (IsSplitLongOrDouble()) { 1854 // Read into union so that we don't case to a double. 1855 double_arg = ReadSplitLongParam(); 1856 } else { 1857 double_arg = *reinterpret_cast<uint64_t*>(GetParamAddress()); 1858 } 1859 sm_.AdvanceDouble(double_arg); 1860 break; 1861 } 1862 case Primitive::kPrimNot: { 1863 StackReference<mirror::Object>* stack_ref = 1864 reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); 1865 sm_.AdvanceHandleScope(stack_ref->AsMirrorPtr()); 1866 break; 1867 } 1868 case Primitive::kPrimFloat: 1869 sm_.AdvanceFloat(*reinterpret_cast<float*>(GetParamAddress())); 1870 break; 1871 case Primitive::kPrimBoolean: // Fall-through. 1872 case Primitive::kPrimByte: // Fall-through. 1873 case Primitive::kPrimChar: // Fall-through. 1874 case Primitive::kPrimShort: // Fall-through. 1875 case Primitive::kPrimInt: // Fall-through. 1876 sm_.AdvanceInt(*reinterpret_cast<jint*>(GetParamAddress())); 1877 break; 1878 case Primitive::kPrimVoid: 1879 LOG(FATAL) << "UNREACHABLE"; 1880 UNREACHABLE(); 1881 } 1882} 1883 1884void BuildGenericJniFrameVisitor::FinalizeHandleScope(Thread* self) { 1885 // Clear out rest of the scope. 1886 jni_call_.ResetRemainingScopeSlots(); 1887 // Install HandleScope. 1888 self->PushHandleScope(handle_scope_); 1889} 1890 1891#if defined(__arm__) || defined(__aarch64__) 1892extern "C" void* artFindNativeMethod(); 1893#else 1894extern "C" void* artFindNativeMethod(Thread* self); 1895#endif 1896 1897uint64_t artQuickGenericJniEndJNIRef(Thread* self, uint32_t cookie, jobject l, jobject lock) { 1898 if (lock != nullptr) { 1899 return reinterpret_cast<uint64_t>(JniMethodEndWithReferenceSynchronized(l, cookie, lock, self)); 1900 } else { 1901 return reinterpret_cast<uint64_t>(JniMethodEndWithReference(l, cookie, self)); 1902 } 1903} 1904 1905void artQuickGenericJniEndJNINonRef(Thread* self, uint32_t cookie, jobject lock) { 1906 if (lock != nullptr) { 1907 JniMethodEndSynchronized(cookie, lock, self); 1908 } else { 1909 JniMethodEnd(cookie, self); 1910 } 1911} 1912 1913/* 1914 * Initializes an alloca region assumed to be directly below sp for a native call: 1915 * Create a HandleScope and call stack and fill a mini stack with values to be pushed to registers. 1916 * The final element on the stack is a pointer to the native code. 1917 * 1918 * On entry, the stack has a standard callee-save frame above sp, and an alloca below it. 1919 * We need to fix this, as the handle scope needs to go into the callee-save frame. 1920 * 1921 * The return of this function denotes: 1922 * 1) How many bytes of the alloca can be released, if the value is non-negative. 1923 * 2) An error, if the value is negative. 1924 */ 1925extern "C" TwoWordReturn artQuickGenericJniTrampoline(Thread* self, ArtMethod** sp) 1926 SHARED_REQUIRES(Locks::mutator_lock_) { 1927 ArtMethod* called = *sp; 1928 DCHECK(called->IsNative()) << PrettyMethod(called, true); 1929 uint32_t shorty_len = 0; 1930 const char* shorty = called->GetShorty(&shorty_len); 1931 1932 // Run the visitor and update sp. 1933 BuildGenericJniFrameVisitor visitor(self, called->IsStatic(), shorty, shorty_len, &sp); 1934 visitor.VisitArguments(); 1935 visitor.FinalizeHandleScope(self); 1936 1937 // Fix up managed-stack things in Thread. 1938 self->SetTopOfStack(sp); 1939 1940 self->VerifyStack(); 1941 1942 // Start JNI, save the cookie. 1943 uint32_t cookie; 1944 if (called->IsSynchronized()) { 1945 cookie = JniMethodStartSynchronized(visitor.GetFirstHandleScopeJObject(), self); 1946 if (self->IsExceptionPending()) { 1947 self->PopHandleScope(); 1948 // A negative value denotes an error. 1949 return GetTwoWordFailureValue(); 1950 } 1951 } else { 1952 cookie = JniMethodStart(self); 1953 } 1954 uint32_t* sp32 = reinterpret_cast<uint32_t*>(sp); 1955 *(sp32 - 1) = cookie; 1956 1957 // Retrieve the stored native code. 1958 void* nativeCode = called->GetEntryPointFromJni(); 1959 1960 // There are two cases for the content of nativeCode: 1961 // 1) Pointer to the native function. 1962 // 2) Pointer to the trampoline for native code binding. 1963 // In the second case, we need to execute the binding and continue with the actual native function 1964 // pointer. 1965 DCHECK(nativeCode != nullptr); 1966 if (nativeCode == GetJniDlsymLookupStub()) { 1967#if defined(__arm__) || defined(__aarch64__) 1968 nativeCode = artFindNativeMethod(); 1969#else 1970 nativeCode = artFindNativeMethod(self); 1971#endif 1972 1973 if (nativeCode == nullptr) { 1974 DCHECK(self->IsExceptionPending()); // There should be an exception pending now. 1975 1976 // End JNI, as the assembly will move to deliver the exception. 1977 jobject lock = called->IsSynchronized() ? visitor.GetFirstHandleScopeJObject() : nullptr; 1978 if (shorty[0] == 'L') { 1979 artQuickGenericJniEndJNIRef(self, cookie, nullptr, lock); 1980 } else { 1981 artQuickGenericJniEndJNINonRef(self, cookie, lock); 1982 } 1983 1984 return GetTwoWordFailureValue(); 1985 } 1986 // Note that the native code pointer will be automatically set by artFindNativeMethod(). 1987 } 1988 1989 // Return native code addr(lo) and bottom of alloca address(hi). 1990 return GetTwoWordSuccessValue(reinterpret_cast<uintptr_t>(visitor.GetBottomOfUsedArea()), 1991 reinterpret_cast<uintptr_t>(nativeCode)); 1992} 1993 1994// Defined in quick_jni_entrypoints.cc. 1995extern uint64_t GenericJniMethodEnd(Thread* self, uint32_t saved_local_ref_cookie, 1996 jvalue result, uint64_t result_f, ArtMethod* called, 1997 HandleScope* handle_scope); 1998/* 1999 * Is called after the native JNI code. Responsible for cleanup (handle scope, saved state) and 2000 * unlocking. 2001 */ 2002extern "C" uint64_t artQuickGenericJniEndTrampoline(Thread* self, 2003 jvalue result, 2004 uint64_t result_f) { 2005 // We're here just back from a native call. We don't have the shared mutator lock at this point 2006 // yet until we call GoToRunnable() later in GenericJniMethodEnd(). Accessing objects or doing 2007 // anything that requires a mutator lock before that would cause problems as GC may have the 2008 // exclusive mutator lock and may be moving objects, etc. 2009 ArtMethod** sp = self->GetManagedStack()->GetTopQuickFrame(); 2010 uint32_t* sp32 = reinterpret_cast<uint32_t*>(sp); 2011 ArtMethod* called = *sp; 2012 uint32_t cookie = *(sp32 - 1); 2013 HandleScope* table = reinterpret_cast<HandleScope*>(reinterpret_cast<uint8_t*>(sp) + sizeof(*sp)); 2014 return GenericJniMethodEnd(self, cookie, result, result_f, called, table); 2015} 2016 2017// We use TwoWordReturn to optimize scalar returns. We use the hi value for code, and the lo value 2018// for the method pointer. 2019// 2020// It is valid to use this, as at the usage points here (returns from C functions) we are assuming 2021// to hold the mutator lock (see SHARED_REQUIRES(Locks::mutator_lock_) annotations). 2022 2023template<InvokeType type, bool access_check> 2024static TwoWordReturn artInvokeCommon(uint32_t method_idx, mirror::Object* this_object, Thread* self, 2025 ArtMethod** sp) { 2026 ScopedQuickEntrypointChecks sqec(self); 2027 DCHECK_EQ(*sp, Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs)); 2028 ArtMethod* caller_method = QuickArgumentVisitor::GetCallingMethod(sp); 2029 ArtMethod* method = FindMethodFast(method_idx, this_object, caller_method, access_check, type); 2030 if (UNLIKELY(method == nullptr)) { 2031 const DexFile* dex_file = caller_method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 2032 uint32_t shorty_len; 2033 const char* shorty = dex_file->GetMethodShorty(dex_file->GetMethodId(method_idx), &shorty_len); 2034 { 2035 // Remember the args in case a GC happens in FindMethodFromCode. 2036 ScopedObjectAccessUnchecked soa(self->GetJniEnv()); 2037 RememberForGcArgumentVisitor visitor(sp, type == kStatic, shorty, shorty_len, &soa); 2038 visitor.VisitArguments(); 2039 method = FindMethodFromCode<type, access_check>(method_idx, &this_object, caller_method, 2040 self); 2041 visitor.FixupReferences(); 2042 } 2043 2044 if (UNLIKELY(method == nullptr)) { 2045 CHECK(self->IsExceptionPending()); 2046 return GetTwoWordFailureValue(); // Failure. 2047 } 2048 } 2049 DCHECK(!self->IsExceptionPending()); 2050 const void* code = method->GetEntryPointFromQuickCompiledCode(); 2051 2052 // When we return, the caller will branch to this address, so it had better not be 0! 2053 DCHECK(code != nullptr) << "Code was null in method: " << PrettyMethod(method) 2054 << " location: " 2055 << method->GetDexFile()->GetLocation(); 2056 2057 return GetTwoWordSuccessValue(reinterpret_cast<uintptr_t>(code), 2058 reinterpret_cast<uintptr_t>(method)); 2059} 2060 2061// Explicit artInvokeCommon template function declarations to please analysis tool. 2062#define EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(type, access_check) \ 2063 template SHARED_REQUIRES(Locks::mutator_lock_) \ 2064 TwoWordReturn artInvokeCommon<type, access_check>( \ 2065 uint32_t method_idx, mirror::Object* this_object, Thread* self, ArtMethod** sp) 2066 2067EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kVirtual, false); 2068EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kVirtual, true); 2069EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kInterface, false); 2070EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kInterface, true); 2071EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kDirect, false); 2072EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kDirect, true); 2073EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kStatic, false); 2074EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kStatic, true); 2075EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kSuper, false); 2076EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL(kSuper, true); 2077#undef EXPLICIT_INVOKE_COMMON_TEMPLATE_DECL 2078 2079// See comments in runtime_support_asm.S 2080extern "C" TwoWordReturn artInvokeInterfaceTrampolineWithAccessCheck( 2081 uint32_t method_idx, mirror::Object* this_object, Thread* self, ArtMethod** sp) 2082 SHARED_REQUIRES(Locks::mutator_lock_) { 2083 return artInvokeCommon<kInterface, true>(method_idx, this_object, self, sp); 2084} 2085 2086extern "C" TwoWordReturn artInvokeDirectTrampolineWithAccessCheck( 2087 uint32_t method_idx, mirror::Object* this_object, Thread* self, ArtMethod** sp) 2088 SHARED_REQUIRES(Locks::mutator_lock_) { 2089 return artInvokeCommon<kDirect, true>(method_idx, this_object, self, sp); 2090} 2091 2092extern "C" TwoWordReturn artInvokeStaticTrampolineWithAccessCheck( 2093 uint32_t method_idx, mirror::Object* this_object, Thread* self, ArtMethod** sp) 2094 SHARED_REQUIRES(Locks::mutator_lock_) { 2095 return artInvokeCommon<kStatic, true>(method_idx, this_object, self, sp); 2096} 2097 2098extern "C" TwoWordReturn artInvokeSuperTrampolineWithAccessCheck( 2099 uint32_t method_idx, mirror::Object* this_object, Thread* self, ArtMethod** sp) 2100 SHARED_REQUIRES(Locks::mutator_lock_) { 2101 return artInvokeCommon<kSuper, true>(method_idx, this_object, self, sp); 2102} 2103 2104extern "C" TwoWordReturn artInvokeVirtualTrampolineWithAccessCheck( 2105 uint32_t method_idx, mirror::Object* this_object, Thread* self, ArtMethod** sp) 2106 SHARED_REQUIRES(Locks::mutator_lock_) { 2107 return artInvokeCommon<kVirtual, true>(method_idx, this_object, self, sp); 2108} 2109 2110// Determine target of interface dispatch. This object is known non-null. 2111extern "C" TwoWordReturn artInvokeInterfaceTrampoline(uint32_t dex_method_idx, 2112 mirror::Object* this_object, 2113 Thread* self, ArtMethod** sp) 2114 SHARED_REQUIRES(Locks::mutator_lock_) { 2115 ScopedQuickEntrypointChecks sqec(self); 2116 // The optimizing compiler currently does not inline methods that have an interface 2117 // invocation. We use the outer method directly to avoid fetching a stack map, which is 2118 // more expensive. 2119 ArtMethod* caller_method = QuickArgumentVisitor::GetOuterMethod(sp); 2120 DCHECK_EQ(caller_method, QuickArgumentVisitor::GetCallingMethod(sp)); 2121 ArtMethod* interface_method = caller_method->GetDexCacheResolvedMethod( 2122 dex_method_idx, sizeof(void*)); 2123 DCHECK(interface_method != nullptr) << dex_method_idx << " " << PrettyMethod(caller_method); 2124 ArtMethod* method; 2125 if (LIKELY(interface_method->GetDexMethodIndex() != DexFile::kDexNoIndex)) { 2126 method = this_object->GetClass()->FindVirtualMethodForInterface( 2127 interface_method, sizeof(void*)); 2128 if (UNLIKELY(method == nullptr)) { 2129 ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch( 2130 interface_method, this_object, caller_method); 2131 return GetTwoWordFailureValue(); // Failure. 2132 } 2133 } else { 2134 DCHECK_EQ(interface_method, Runtime::Current()->GetResolutionMethod()); 2135 if (kIsDebugBuild) { 2136 uint32_t dex_pc = QuickArgumentVisitor::GetCallingDexPc(sp); 2137 const DexFile::CodeItem* code = caller_method->GetCodeItem(); 2138 CHECK_LT(dex_pc, code->insns_size_in_code_units_); 2139 const Instruction* instr = Instruction::At(&code->insns_[dex_pc]); 2140 Instruction::Code instr_code = instr->Opcode(); 2141 CHECK(instr_code == Instruction::INVOKE_INTERFACE || 2142 instr_code == Instruction::INVOKE_INTERFACE_RANGE) 2143 << "Unexpected call into interface trampoline: " << instr->DumpString(nullptr); 2144 if (instr_code == Instruction::INVOKE_INTERFACE) { 2145 CHECK_EQ(dex_method_idx, instr->VRegB_35c()); 2146 } else { 2147 CHECK_EQ(instr_code, Instruction::INVOKE_INTERFACE_RANGE); 2148 CHECK_EQ(dex_method_idx, instr->VRegB_3rc()); 2149 } 2150 } 2151 2152 const DexFile* dex_file = caller_method->GetDeclaringClass()->GetDexCache() 2153 ->GetDexFile(); 2154 uint32_t shorty_len; 2155 const char* shorty = dex_file->GetMethodShorty(dex_file->GetMethodId(dex_method_idx), 2156 &shorty_len); 2157 { 2158 // Remember the args in case a GC happens in FindMethodFromCode. 2159 ScopedObjectAccessUnchecked soa(self->GetJniEnv()); 2160 RememberForGcArgumentVisitor visitor(sp, false, shorty, shorty_len, &soa); 2161 visitor.VisitArguments(); 2162 method = FindMethodFromCode<kInterface, false>(dex_method_idx, &this_object, caller_method, 2163 self); 2164 visitor.FixupReferences(); 2165 } 2166 2167 if (UNLIKELY(method == nullptr)) { 2168 CHECK(self->IsExceptionPending()); 2169 return GetTwoWordFailureValue(); // Failure. 2170 } 2171 } 2172 const void* code = method->GetEntryPointFromQuickCompiledCode(); 2173 2174 // When we return, the caller will branch to this address, so it had better not be 0! 2175 DCHECK(code != nullptr) << "Code was null in method: " << PrettyMethod(method) 2176 << " location: " << method->GetDexFile()->GetLocation(); 2177 2178 return GetTwoWordSuccessValue(reinterpret_cast<uintptr_t>(code), 2179 reinterpret_cast<uintptr_t>(method)); 2180} 2181 2182} // namespace art 2183