| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "callee_save_frame.h" |
| #include "common_throws.h" |
| #include "dex_file-inl.h" |
| #include "dex_instruction-inl.h" |
| #include "entrypoints/entrypoint_utils.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "interpreter/interpreter.h" |
| #include "invoke_arg_array_builder.h" |
| #include "mirror/art_method-inl.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "object_utils.h" |
| #include "runtime.h" |
| |
| namespace art { |
| |
| // Visits the arguments as saved to the stack by a Runtime::kRefAndArgs callee save frame. |
| class QuickArgumentVisitor { |
| // Size of each spilled GPR. |
| #ifdef __LP64__ |
| static constexpr size_t kBytesPerGprSpillLocation = 8; |
| #else |
| static constexpr size_t kBytesPerGprSpillLocation = 4; |
| #endif |
| // Number of bytes for each out register in the caller method's frame. |
| static constexpr size_t kBytesStackArgLocation = 4; |
| #if defined(__arm__) |
| // The callee save frame is pointed to by SP. |
| // | argN | | |
| // | ... | | |
| // | arg4 | | |
| // | arg3 spill | | Caller's frame |
| // | arg2 spill | | |
| // | arg1 spill | | |
| // | Method* | --- |
| // | LR | |
| // | ... | callee saves |
| // | R3 | arg3 |
| // | R2 | arg2 |
| // | R1 | arg1 |
| // | R0 | padding |
| // | Method* | <- sp |
| static constexpr bool kSoftFloatAbi = true; // This is a soft float ABI. |
| static constexpr size_t kNumGprArgs = 3; // 3 arguments passed in GPRs. |
| static constexpr size_t kNumFprArgs = 0; // 0 arguments passed in FPRs. |
| static constexpr size_t kBytesPerFprSpillLocation = 4; // FPR spill size is 4 bytes. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 0; // Offset of first FPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 8; // Offset of first GPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 44; // Offset of return address. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_FrameSize = 48; // Frame size. |
| static size_t GprIndexToGprOffset(uint32_t gpr_index) { |
| return gpr_index * kBytesPerGprSpillLocation; |
| } |
| #elif defined(__mips__) |
| // The callee save frame is pointed to by SP. |
| // | argN | | |
| // | ... | | |
| // | arg4 | | |
| // | arg3 spill | | Caller's frame |
| // | arg2 spill | | |
| // | arg1 spill | | |
| // | Method* | --- |
| // | RA | |
| // | ... | callee saves |
| // | A3 | arg3 |
| // | A2 | arg2 |
| // | A1 | arg1 |
| // | A0/Method* | <- sp |
| static constexpr bool kSoftFloatAbi = true; // This is a soft float ABI. |
| static constexpr size_t kNumGprArgs = 3; // 3 arguments passed in GPRs. |
| static constexpr size_t kNumFprArgs = 0; // 0 arguments passed in FPRs. |
| static constexpr size_t kBytesPerFprSpillLocation = 4; // FPR spill size is 4 bytes. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 0; // Offset of first FPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 4; // Offset of first GPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 60; // Offset of return address. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_FrameSize = 64; // Frame size. |
| static size_t GprIndexToGprOffset(uint32_t gpr_index) { |
| return gpr_index * kBytesPerGprSpillLocation; |
| } |
| #elif defined(__i386__) |
| // The callee save frame is pointed to by SP. |
| // | argN | | |
| // | ... | | |
| // | arg4 | | |
| // | arg3 spill | | Caller's frame |
| // | arg2 spill | | |
| // | arg1 spill | | |
| // | Method* | --- |
| // | Return | |
| // | EBP,ESI,EDI | callee saves |
| // | EBX | arg3 |
| // | EDX | arg2 |
| // | ECX | arg1 |
| // | EAX/Method* | <- sp |
| static constexpr bool kSoftFloatAbi = true; // This is a soft float ABI. |
| static constexpr size_t kNumGprArgs = 3; // 3 arguments passed in GPRs. |
| static constexpr size_t kNumFprArgs = 0; // 0 arguments passed in FPRs. |
| static constexpr size_t kBytesPerFprSpillLocation = 8; // FPR spill size is 8 bytes. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 0; // Offset of first FPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 4; // Offset of first GPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 28; // Offset of return address. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_FrameSize = 32; // Frame size. |
| static size_t GprIndexToGprOffset(uint32_t gpr_index) { |
| return gpr_index * kBytesPerGprSpillLocation; |
| } |
| #elif defined(__x86_64__) |
| // The callee save frame is pointed to by SP. |
| // | argN | | |
| // | ... | | |
| // | reg. arg spills | | Caller's frame |
| // | Method* | --- |
| // | Return | |
| // | R15 | callee save |
| // | R14 | callee save |
| // | R13 | callee save |
| // | R12 | callee save |
| // | R9 | arg5 |
| // | R8 | arg4 |
| // | RSI/R6 | arg1 |
| // | RBP/R5 | callee save |
| // | RBX/R3 | callee save |
| // | RDX/R2 | arg2 |
| // | RCX/R1 | arg3 |
| // | XMM7 | float arg 8 |
| // | XMM6 | float arg 7 |
| // | XMM5 | float arg 6 |
| // | XMM4 | float arg 5 |
| // | XMM3 | float arg 4 |
| // | XMM2 | float arg 3 |
| // | XMM1 | float arg 2 |
| // | XMM0 | float arg 1 |
| // | Padding | |
| // | RDI/Method* | <- sp |
| static constexpr bool kSoftFloatAbi = false; // This is a hard float ABI. |
| static constexpr size_t kNumGprArgs = 5; // 3 arguments passed in GPRs. |
| static constexpr size_t kNumFprArgs = 8; // 0 arguments passed in FPRs. |
| static constexpr size_t kBytesPerFprSpillLocation = 8; // FPR spill size is 8 bytes. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset = 16; // Offset of first FPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset = 80; // Offset of first GPR arg. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_LrOffset = 168; // Offset of return address. |
| static constexpr size_t kQuickCalleeSaveFrame_RefAndArgs_FrameSize = 176; // Frame size. |
| static size_t GprIndexToGprOffset(uint32_t gpr_index) { |
| switch (gpr_index) { |
| case 0: return (4 * kBytesPerGprSpillLocation); |
| case 1: return (1 * kBytesPerGprSpillLocation); |
| case 2: return (0 * kBytesPerGprSpillLocation); |
| case 3: return (5 * kBytesPerGprSpillLocation); |
| case 4: return (6 * kBytesPerGprSpillLocation); |
| default: |
| LOG(FATAL) << "Unexpected GPR index: " << gpr_index; |
| return 0; |
| } |
| } |
| #else |
| #error "Unsupported architecture" |
| #endif |
| |
| public: |
| static mirror::ArtMethod* GetCallingMethod(mirror::ArtMethod** sp) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| DCHECK((*sp)->IsCalleeSaveMethod()); |
| byte* previous_sp = reinterpret_cast<byte*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_FrameSize; |
| return *reinterpret_cast<mirror::ArtMethod**>(previous_sp); |
| } |
| |
| // For the given quick ref and args quick frame, return the caller's PC. |
| static uintptr_t GetCallingPc(mirror::ArtMethod** sp) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| DCHECK((*sp)->IsCalleeSaveMethod()); |
| byte* lr = reinterpret_cast<byte*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_LrOffset; |
| return *reinterpret_cast<uintptr_t*>(lr); |
| } |
| |
| QuickArgumentVisitor(mirror::ArtMethod** sp, bool is_static, |
| const char* shorty, uint32_t shorty_len) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) : |
| is_static_(is_static), shorty_(shorty), shorty_len_(shorty_len), |
| gpr_args_(reinterpret_cast<byte*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset), |
| fpr_args_(reinterpret_cast<byte*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset), |
| stack_args_(reinterpret_cast<byte*>(sp) + kQuickCalleeSaveFrame_RefAndArgs_FrameSize |
| + StackArgumentStartFromShorty(is_static, shorty, shorty_len)), |
| gpr_index_(0), fpr_index_(0), stack_index_(0), cur_type_(Primitive::kPrimVoid), |
| is_split_long_or_double_(false) { |
| DCHECK_EQ(kQuickCalleeSaveFrame_RefAndArgs_FrameSize, |
| Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs)->GetFrameSizeInBytes()); |
| } |
| |
| virtual ~QuickArgumentVisitor() {} |
| |
| virtual void Visit() = 0; |
| |
| Primitive::Type GetParamPrimitiveType() const { |
| return cur_type_; |
| } |
| |
| byte* GetParamAddress() const { |
| if (!kSoftFloatAbi) { |
| Primitive::Type type = GetParamPrimitiveType(); |
| if (UNLIKELY((type == Primitive::kPrimDouble) || (type == Primitive::kPrimFloat))) { |
| if ((kNumFprArgs != 0) && (fpr_index_ + 1 < kNumFprArgs + 1)) { |
| return fpr_args_ + (fpr_index_ * kBytesPerFprSpillLocation); |
| } |
| } |
| } |
| if (gpr_index_ < kNumGprArgs) { |
| return gpr_args_ + GprIndexToGprOffset(gpr_index_); |
| } |
| return stack_args_ + (stack_index_ * kBytesStackArgLocation); |
| } |
| |
| bool IsSplitLongOrDouble() const { |
| if ((kBytesPerGprSpillLocation == 4) || (kBytesPerFprSpillLocation == 4)) { |
| return is_split_long_or_double_; |
| } else { |
| return false; // An optimization for when GPR and FPRs are 64bit. |
| } |
| } |
| |
| bool IsParamAReference() const { |
| return GetParamPrimitiveType() == Primitive::kPrimNot; |
| } |
| |
| bool IsParamALongOrDouble() const { |
| Primitive::Type type = GetParamPrimitiveType(); |
| return type == Primitive::kPrimLong || type == Primitive::kPrimDouble; |
| } |
| |
| uint64_t ReadSplitLongParam() const { |
| DCHECK(IsSplitLongOrDouble()); |
| uint64_t low_half = *reinterpret_cast<uint32_t*>(GetParamAddress()); |
| uint64_t high_half = *reinterpret_cast<uint32_t*>(stack_args_); |
| return (low_half & 0xffffffffULL) | (high_half << 32); |
| } |
| |
| void VisitArguments() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| gpr_index_ = 0; |
| fpr_index_ = 0; |
| stack_index_ = 0; |
| if (!is_static_) { // Handle this. |
| cur_type_ = Primitive::kPrimNot; |
| is_split_long_or_double_ = false; |
| Visit(); |
| if (kNumGprArgs > 0) { |
| gpr_index_++; |
| } else { |
| stack_index_++; |
| } |
| } |
| for (uint32_t shorty_index = 1; shorty_index < shorty_len_; ++shorty_index) { |
| cur_type_ = Primitive::GetType(shorty_[shorty_index]); |
| switch (cur_type_) { |
| case Primitive::kPrimNot: |
| case Primitive::kPrimBoolean: |
| case Primitive::kPrimByte: |
| case Primitive::kPrimChar: |
| case Primitive::kPrimShort: |
| case Primitive::kPrimInt: |
| is_split_long_or_double_ = false; |
| Visit(); |
| if (gpr_index_ < kNumGprArgs) { |
| gpr_index_++; |
| } else { |
| stack_index_++; |
| } |
| break; |
| case Primitive::kPrimFloat: |
| is_split_long_or_double_ = false; |
| Visit(); |
| if (kSoftFloatAbi) { |
| if (gpr_index_ < kNumGprArgs) { |
| gpr_index_++; |
| } else { |
| stack_index_++; |
| } |
| } else { |
| if ((kNumFprArgs != 0) && (fpr_index_ + 1 < kNumFprArgs + 1)) { |
| fpr_index_++; |
| } else { |
| stack_index_++; |
| } |
| } |
| break; |
| case Primitive::kPrimDouble: |
| case Primitive::kPrimLong: |
| if (kSoftFloatAbi || (cur_type_ == Primitive::kPrimLong)) { |
| is_split_long_or_double_ = (kBytesPerGprSpillLocation == 4) && |
| ((gpr_index_ + 1) == kNumGprArgs); |
| Visit(); |
| if (gpr_index_ < kNumGprArgs) { |
| gpr_index_++; |
| if (kBytesPerGprSpillLocation == 4) { |
| if (gpr_index_ < kNumGprArgs) { |
| gpr_index_++; |
| } else { |
| stack_index_++; |
| } |
| } |
| } else { |
| if (kBytesStackArgLocation == 4) { |
| stack_index_+= 2; |
| } else { |
| CHECK_EQ(kBytesStackArgLocation, 8U); |
| stack_index_++; |
| } |
| } |
| } else { |
| is_split_long_or_double_ = (kBytesPerFprSpillLocation == 4) && |
| ((fpr_index_ + 1) == kNumFprArgs); |
| Visit(); |
| if ((kNumFprArgs != 0) && (fpr_index_ + 1 < kNumFprArgs + 1)) { |
| fpr_index_++; |
| if (kBytesPerFprSpillLocation == 4) { |
| if ((kNumFprArgs != 0) && (fpr_index_ + 1 < kNumFprArgs + 1)) { |
| fpr_index_++; |
| } else { |
| stack_index_++; |
| } |
| } |
| } else { |
| if (kBytesStackArgLocation == 4) { |
| stack_index_+= 2; |
| } else { |
| CHECK_EQ(kBytesStackArgLocation, 8U); |
| stack_index_++; |
| } |
| } |
| } |
| break; |
| default: |
| LOG(FATAL) << "Unexpected type: " << cur_type_ << " in " << shorty_; |
| } |
| } |
| } |
| |
| private: |
| static size_t StackArgumentStartFromShorty(bool is_static, const char* shorty, |
| uint32_t shorty_len) { |
| if (kSoftFloatAbi) { |
| CHECK_EQ(kNumFprArgs, 0U); |
| return (kNumGprArgs * kBytesPerGprSpillLocation) + kBytesPerGprSpillLocation /* ArtMethod* */; |
| } else { |
| size_t offset = kBytesPerGprSpillLocation; // Skip Method*. |
| size_t gprs_seen = 0; |
| size_t fprs_seen = 0; |
| if (!is_static && (gprs_seen < kNumGprArgs)) { |
| gprs_seen++; |
| offset += kBytesStackArgLocation; |
| } |
| for (uint32_t i = 1; i < shorty_len; ++i) { |
| switch (shorty[i]) { |
| case 'Z': |
| case 'B': |
| case 'C': |
| case 'S': |
| case 'I': |
| case 'L': |
| if (gprs_seen < kNumGprArgs) { |
| gprs_seen++; |
| offset += kBytesStackArgLocation; |
| } |
| break; |
| case 'J': |
| if (gprs_seen < kNumGprArgs) { |
| gprs_seen++; |
| offset += 2 * kBytesStackArgLocation; |
| if (kBytesPerGprSpillLocation == 4) { |
| if (gprs_seen < kNumGprArgs) { |
| gprs_seen++; |
| } |
| } |
| } |
| break; |
| case 'F': |
| if ((kNumFprArgs != 0) && (fprs_seen + 1 < kNumFprArgs + 1)) { |
| fprs_seen++; |
| offset += kBytesStackArgLocation; |
| } |
| break; |
| case 'D': |
| if ((kNumFprArgs != 0) && (fprs_seen + 1 < kNumFprArgs + 1)) { |
| fprs_seen++; |
| offset += 2 * kBytesStackArgLocation; |
| if (kBytesPerFprSpillLocation == 4) { |
| if ((kNumFprArgs != 0) && (fprs_seen + 1 < kNumFprArgs + 1)) { |
| fprs_seen++; |
| } |
| } |
| } |
| break; |
| default: |
| LOG(FATAL) << "Unexpected shorty character: " << shorty[i] << " in " << shorty; |
| } |
| } |
| return offset; |
| } |
| } |
| |
| const bool is_static_; |
| const char* const shorty_; |
| const uint32_t shorty_len_; |
| byte* const gpr_args_; // Address of GPR arguments in callee save frame. |
| byte* const fpr_args_; // Address of FPR arguments in callee save frame. |
| byte* const stack_args_; // Address of stack arguments in caller's frame. |
| uint32_t gpr_index_; // Index into spilled GPRs. |
| uint32_t fpr_index_; // Index into spilled FPRs. |
| uint32_t stack_index_; // Index into arguments on the stack. |
| // The current type of argument during VisitArguments. |
| Primitive::Type cur_type_; |
| // Does a 64bit parameter straddle the register and stack arguments? |
| bool is_split_long_or_double_; |
| }; |
| |
| // Visits arguments on the stack placing them into the shadow frame. |
| class BuildQuickShadowFrameVisitor : public QuickArgumentVisitor { |
| public: |
| BuildQuickShadowFrameVisitor(mirror::ArtMethod** sp, bool is_static, const char* shorty, |
| uint32_t shorty_len, ShadowFrame* sf, size_t first_arg_reg) : |
| QuickArgumentVisitor(sp, is_static, shorty, shorty_len), sf_(sf), cur_reg_(first_arg_reg) {} |
| |
| virtual void Visit() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| Primitive::Type type = GetParamPrimitiveType(); |
| switch (type) { |
| case Primitive::kPrimLong: // Fall-through. |
| case Primitive::kPrimDouble: |
| if (IsSplitLongOrDouble()) { |
| sf_->SetVRegLong(cur_reg_, ReadSplitLongParam()); |
| } else { |
| sf_->SetVRegLong(cur_reg_, *reinterpret_cast<jlong*>(GetParamAddress())); |
| } |
| ++cur_reg_; |
| break; |
| case Primitive::kPrimNot: { |
| StackReference<mirror::Object>* stack_ref = |
| reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); |
| sf_->SetVRegReference(cur_reg_, stack_ref->AsMirrorPtr()); |
| } |
| break; |
| case Primitive::kPrimBoolean: // Fall-through. |
| case Primitive::kPrimByte: // Fall-through. |
| case Primitive::kPrimChar: // Fall-through. |
| case Primitive::kPrimShort: // Fall-through. |
| case Primitive::kPrimInt: // Fall-through. |
| case Primitive::kPrimFloat: |
| sf_->SetVReg(cur_reg_, *reinterpret_cast<jint*>(GetParamAddress())); |
| break; |
| case Primitive::kPrimVoid: |
| LOG(FATAL) << "UNREACHABLE"; |
| break; |
| } |
| ++cur_reg_; |
| } |
| |
| private: |
| ShadowFrame* const sf_; |
| uint32_t cur_reg_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BuildQuickShadowFrameVisitor); |
| }; |
| |
| extern "C" uint64_t artQuickToInterpreterBridge(mirror::ArtMethod* method, Thread* self, |
| mirror::ArtMethod** sp) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // Ensure we don't get thread suspension until the object arguments are safely in the shadow |
| // frame. |
| FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsAndArgs); |
| |
| if (method->IsAbstract()) { |
| ThrowAbstractMethodError(method); |
| return 0; |
| } else { |
| const char* old_cause = self->StartAssertNoThreadSuspension("Building interpreter shadow frame"); |
| MethodHelper mh(method); |
| const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| uint16_t num_regs = code_item->registers_size_; |
| void* memory = alloca(ShadowFrame::ComputeSize(num_regs)); |
| ShadowFrame* shadow_frame(ShadowFrame::Create(num_regs, NULL, // No last shadow coming from quick. |
| method, 0, memory)); |
| size_t first_arg_reg = code_item->registers_size_ - code_item->ins_size_; |
| BuildQuickShadowFrameVisitor shadow_frame_builder(sp, mh.IsStatic(), mh.GetShorty(), |
| mh.GetShortyLength(), |
| shadow_frame, first_arg_reg); |
| shadow_frame_builder.VisitArguments(); |
| // Push a transition back into managed code onto the linked list in thread. |
| ManagedStack fragment; |
| self->PushManagedStackFragment(&fragment); |
| self->PushShadowFrame(shadow_frame); |
| self->EndAssertNoThreadSuspension(old_cause); |
| |
| if (method->IsStatic() && !method->GetDeclaringClass()->IsInitializing()) { |
| // Ensure static method's class is initialized. |
| SirtRef<mirror::Class> sirt_c(self, method->GetDeclaringClass()); |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(sirt_c, true, true)) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| self->PopManagedStackFragment(fragment); |
| return 0; |
| } |
| } |
| |
| JValue result = interpreter::EnterInterpreterFromStub(self, mh, code_item, *shadow_frame); |
| // Pop transition. |
| self->PopManagedStackFragment(fragment); |
| // No need to restore the args since the method has already been run by the interpreter. |
| return result.GetJ(); |
| } |
| } |
| |
| // Visits arguments on the stack placing them into the args vector, Object* arguments are converted |
| // to jobjects. |
| class BuildQuickArgumentVisitor : public QuickArgumentVisitor { |
| public: |
| BuildQuickArgumentVisitor(mirror::ArtMethod** sp, bool is_static, const char* shorty, |
| uint32_t shorty_len, ScopedObjectAccessUnchecked* soa, |
| std::vector<jvalue>* args) : |
| QuickArgumentVisitor(sp, is_static, shorty, shorty_len), soa_(soa), args_(args) {} |
| |
| virtual void Visit() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| jvalue val; |
| Primitive::Type type = GetParamPrimitiveType(); |
| switch (type) { |
| case Primitive::kPrimNot: { |
| StackReference<mirror::Object>* stack_ref = |
| reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); |
| val.l = soa_->AddLocalReference<jobject>(stack_ref->AsMirrorPtr()); |
| references_.push_back(std::make_pair(val.l, stack_ref)); |
| break; |
| } |
| case Primitive::kPrimLong: // Fall-through. |
| case Primitive::kPrimDouble: |
| if (IsSplitLongOrDouble()) { |
| val.j = ReadSplitLongParam(); |
| } else { |
| val.j = *reinterpret_cast<jlong*>(GetParamAddress()); |
| } |
| break; |
| case Primitive::kPrimBoolean: // Fall-through. |
| case Primitive::kPrimByte: // Fall-through. |
| case Primitive::kPrimChar: // Fall-through. |
| case Primitive::kPrimShort: // Fall-through. |
| case Primitive::kPrimInt: // Fall-through. |
| case Primitive::kPrimFloat: |
| val.i = *reinterpret_cast<jint*>(GetParamAddress()); |
| break; |
| case Primitive::kPrimVoid: |
| LOG(FATAL) << "UNREACHABLE"; |
| val.j = 0; |
| break; |
| } |
| args_->push_back(val); |
| } |
| |
| void FixupReferences() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // Fixup any references which may have changed. |
| for (const auto& pair : references_) { |
| pair.second->Assign(soa_->Decode<mirror::Object*>(pair.first)); |
| } |
| } |
| |
| private: |
| ScopedObjectAccessUnchecked* soa_; |
| std::vector<jvalue>* args_; |
| // References which we must update when exiting in case the GC moved the objects. |
| std::vector<std::pair<jobject, StackReference<mirror::Object>*> > references_; |
| DISALLOW_COPY_AND_ASSIGN(BuildQuickArgumentVisitor); |
| }; |
| |
| // Handler for invocation on proxy methods. On entry a frame will exist for the proxy object method |
| // which is responsible for recording callee save registers. We explicitly place into jobjects the |
| // incoming reference arguments (so they survive GC). We invoke the invocation handler, which is a |
| // field within the proxy object, which will box the primitive arguments and deal with error cases. |
| extern "C" uint64_t artQuickProxyInvokeHandler(mirror::ArtMethod* proxy_method, |
| mirror::Object* receiver, |
| Thread* self, mirror::ArtMethod** sp) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| DCHECK(proxy_method->IsProxyMethod()) << PrettyMethod(proxy_method); |
| DCHECK(receiver->GetClass()->IsProxyClass()) << PrettyMethod(proxy_method); |
| // Ensure we don't get thread suspension until the object arguments are safely in jobjects. |
| const char* old_cause = |
| self->StartAssertNoThreadSuspension("Adding to IRT proxy object arguments"); |
| // Register the top of the managed stack, making stack crawlable. |
| DCHECK_EQ(*sp, proxy_method) << PrettyMethod(proxy_method); |
| self->SetTopOfStack(sp, 0); |
| DCHECK_EQ(proxy_method->GetFrameSizeInBytes(), |
| Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs)->GetFrameSizeInBytes()) |
| << PrettyMethod(proxy_method); |
| self->VerifyStack(); |
| // Start new JNI local reference state. |
| JNIEnvExt* env = self->GetJniEnv(); |
| ScopedObjectAccessUnchecked soa(env); |
| ScopedJniEnvLocalRefState env_state(env); |
| // Create local ref. copies of proxy method and the receiver. |
| jobject rcvr_jobj = soa.AddLocalReference<jobject>(receiver); |
| |
| // Placing arguments into args vector and remove the receiver. |
| MethodHelper proxy_mh(proxy_method); |
| DCHECK(!proxy_mh.IsStatic()) << PrettyMethod(proxy_method); |
| std::vector<jvalue> args; |
| BuildQuickArgumentVisitor local_ref_visitor(sp, proxy_mh.IsStatic(), proxy_mh.GetShorty(), |
| proxy_mh.GetShortyLength(), &soa, &args); |
| |
| local_ref_visitor.VisitArguments(); |
| DCHECK_GT(args.size(), 0U) << PrettyMethod(proxy_method); |
| args.erase(args.begin()); |
| |
| // Convert proxy method into expected interface method. |
| mirror::ArtMethod* interface_method = proxy_method->FindOverriddenMethod(); |
| DCHECK(interface_method != NULL) << PrettyMethod(proxy_method); |
| DCHECK(!interface_method->IsProxyMethod()) << PrettyMethod(interface_method); |
| jobject interface_method_jobj = soa.AddLocalReference<jobject>(interface_method); |
| |
| // All naked Object*s should now be in jobjects, so its safe to go into the main invoke code |
| // that performs allocations. |
| self->EndAssertNoThreadSuspension(old_cause); |
| JValue result = InvokeProxyInvocationHandler(soa, proxy_mh.GetShorty(), |
| rcvr_jobj, interface_method_jobj, args); |
| // Restore references which might have moved. |
| local_ref_visitor.FixupReferences(); |
| return result.GetJ(); |
| } |
| |
| // Read object references held in arguments from quick frames and place in a JNI local references, |
| // so they don't get garbage collected. |
| class RememberForGcArgumentVisitor : public QuickArgumentVisitor { |
| public: |
| RememberForGcArgumentVisitor(mirror::ArtMethod** sp, bool is_static, const char* shorty, |
| uint32_t shorty_len, ScopedObjectAccessUnchecked* soa) : |
| QuickArgumentVisitor(sp, is_static, shorty, shorty_len), soa_(soa) {} |
| |
| virtual void Visit() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (IsParamAReference()) { |
| StackReference<mirror::Object>* stack_ref = |
| reinterpret_cast<StackReference<mirror::Object>*>(GetParamAddress()); |
| jobject reference = |
| soa_->AddLocalReference<jobject>(stack_ref->AsMirrorPtr()); |
| references_.push_back(std::make_pair(reference, stack_ref)); |
| } |
| } |
| |
| void FixupReferences() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // Fixup any references which may have changed. |
| for (const auto& pair : references_) { |
| pair.second->Assign(soa_->Decode<mirror::Object*>(pair.first)); |
| } |
| } |
| |
| private: |
| ScopedObjectAccessUnchecked* soa_; |
| // References which we must update when exiting in case the GC moved the objects. |
| std::vector<std::pair<jobject, StackReference<mirror::Object>*> > references_; |
| DISALLOW_COPY_AND_ASSIGN(RememberForGcArgumentVisitor); |
| }; |
| |
| // Lazily resolve a method for quick. Called by stub code. |
| extern "C" const void* artQuickResolutionTrampoline(mirror::ArtMethod* called, |
| mirror::Object* receiver, |
| Thread* thread, mirror::ArtMethod** sp) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| FinishCalleeSaveFrameSetup(thread, sp, Runtime::kRefsAndArgs); |
| // Start new JNI local reference state |
| JNIEnvExt* env = thread->GetJniEnv(); |
| ScopedObjectAccessUnchecked soa(env); |
| ScopedJniEnvLocalRefState env_state(env); |
| const char* old_cause = thread->StartAssertNoThreadSuspension("Quick method resolution set up"); |
| |
| // Compute details about the called method (avoid GCs) |
| ClassLinker* linker = Runtime::Current()->GetClassLinker(); |
| mirror::ArtMethod* caller = QuickArgumentVisitor::GetCallingMethod(sp); |
| InvokeType invoke_type; |
| const DexFile* dex_file; |
| uint32_t dex_method_idx; |
| if (called->IsRuntimeMethod()) { |
| uint32_t dex_pc = caller->ToDexPc(QuickArgumentVisitor::GetCallingPc(sp)); |
| const DexFile::CodeItem* code; |
| { |
| MethodHelper mh(caller); |
| dex_file = &mh.GetDexFile(); |
| code = mh.GetCodeItem(); |
| } |
| CHECK_LT(dex_pc, code->insns_size_in_code_units_); |
| const Instruction* instr = Instruction::At(&code->insns_[dex_pc]); |
| Instruction::Code instr_code = instr->Opcode(); |
| bool is_range; |
| switch (instr_code) { |
| case Instruction::INVOKE_DIRECT: |
| invoke_type = kDirect; |
| is_range = false; |
| break; |
| case Instruction::INVOKE_DIRECT_RANGE: |
| invoke_type = kDirect; |
| is_range = true; |
| break; |
| case Instruction::INVOKE_STATIC: |
| invoke_type = kStatic; |
| is_range = false; |
| break; |
| case Instruction::INVOKE_STATIC_RANGE: |
| invoke_type = kStatic; |
| is_range = true; |
| break; |
| case Instruction::INVOKE_SUPER: |
| invoke_type = kSuper; |
| is_range = false; |
| break; |
| case Instruction::INVOKE_SUPER_RANGE: |
| invoke_type = kSuper; |
| is_range = true; |
| break; |
| case Instruction::INVOKE_VIRTUAL: |
| invoke_type = kVirtual; |
| is_range = false; |
| break; |
| case Instruction::INVOKE_VIRTUAL_RANGE: |
| invoke_type = kVirtual; |
| is_range = true; |
| break; |
| case Instruction::INVOKE_INTERFACE: |
| invoke_type = kInterface; |
| is_range = false; |
| break; |
| case Instruction::INVOKE_INTERFACE_RANGE: |
| invoke_type = kInterface; |
| is_range = true; |
| break; |
| default: |
| LOG(FATAL) << "Unexpected call into trampoline: " << instr->DumpString(NULL); |
| // Avoid used uninitialized warnings. |
| invoke_type = kDirect; |
| is_range = false; |
| } |
| dex_method_idx = (is_range) ? instr->VRegB_3rc() : instr->VRegB_35c(); |
| |
| } else { |
| invoke_type = kStatic; |
| dex_file = &MethodHelper(called).GetDexFile(); |
| dex_method_idx = called->GetDexMethodIndex(); |
| } |
| uint32_t shorty_len; |
| const char* shorty = |
| dex_file->GetMethodShorty(dex_file->GetMethodId(dex_method_idx), &shorty_len); |
| RememberForGcArgumentVisitor visitor(sp, invoke_type == kStatic, shorty, shorty_len, &soa); |
| visitor.VisitArguments(); |
| thread->EndAssertNoThreadSuspension(old_cause); |
| bool virtual_or_interface = invoke_type == kVirtual || invoke_type == kInterface; |
| // Resolve method filling in dex cache. |
| if (called->IsRuntimeMethod()) { |
| SirtRef<mirror::Object> sirt_receiver(soa.Self(), virtual_or_interface ? receiver : nullptr); |
| called = linker->ResolveMethod(dex_method_idx, caller, invoke_type); |
| receiver = sirt_receiver.get(); |
| } |
| const void* code = NULL; |
| if (LIKELY(!thread->IsExceptionPending())) { |
| // Incompatible class change should have been handled in resolve method. |
| CHECK(!called->CheckIncompatibleClassChange(invoke_type)); |
| if (virtual_or_interface) { |
| // Refine called method based on receiver. |
| CHECK(receiver != nullptr) << invoke_type; |
| if (invoke_type == kVirtual) { |
| called = receiver->GetClass()->FindVirtualMethodForVirtual(called); |
| } else { |
| called = receiver->GetClass()->FindVirtualMethodForInterface(called); |
| } |
| // We came here because of sharpening. Ensure the dex cache is up-to-date on the method index |
| // of the sharpened method. |
| if (called->GetDexCacheResolvedMethods() == caller->GetDexCacheResolvedMethods()) { |
| caller->GetDexCacheResolvedMethods()->Set<false>(called->GetDexMethodIndex(), called); |
| } else { |
| // Calling from one dex file to another, need to compute the method index appropriate to |
| // the caller's dex file. Since we get here only if the original called was a runtime |
| // method, we've got the correct dex_file and a dex_method_idx from above. |
| DCHECK(&MethodHelper(caller).GetDexFile() == dex_file); |
| uint32_t method_index = |
| MethodHelper(called).FindDexMethodIndexInOtherDexFile(*dex_file, dex_method_idx); |
| if (method_index != DexFile::kDexNoIndex) { |
| caller->GetDexCacheResolvedMethods()->Set<false>(method_index, called); |
| } |
| } |
| } |
| // Ensure that the called method's class is initialized. |
| SirtRef<mirror::Class> called_class(soa.Self(), called->GetDeclaringClass()); |
| linker->EnsureInitialized(called_class, true, true); |
| if (LIKELY(called_class->IsInitialized())) { |
| code = called->GetEntryPointFromQuickCompiledCode(); |
| } else if (called_class->IsInitializing()) { |
| if (invoke_type == kStatic) { |
| // Class is still initializing, go to oat and grab code (trampoline must be left in place |
| // until class is initialized to stop races between threads). |
| code = linker->GetQuickOatCodeFor(called); |
| } else { |
| // No trampoline for non-static methods. |
| code = called->GetEntryPointFromQuickCompiledCode(); |
| } |
| } else { |
| DCHECK(called_class->IsErroneous()); |
| } |
| } |
| CHECK_EQ(code == NULL, thread->IsExceptionPending()); |
| // Fixup any locally saved objects may have moved during a GC. |
| visitor.FixupReferences(); |
| // Place called method in callee-save frame to be placed as first argument to quick method. |
| *sp = called; |
| return code; |
| } |
| |
| } // namespace art |
