/* * Copyright (C) 2016 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. */ #ifndef ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_ #define ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_ #include #include "base/arena_containers.h" #include "base/macros.h" #include "constants_arm.h" #include "offsets.h" #include "utils/arm/assembler_arm_shared.h" #include "utils/arm/assembler_arm_vixl.h" #include "utils/arm/managed_register_arm.h" #include "utils/assembler.h" #include "utils/jni_macro_assembler.h" namespace art { namespace arm { class ArmVIXLJNIMacroAssembler final : public JNIMacroAssemblerFwd { private: class ArmException; public: explicit ArmVIXLJNIMacroAssembler(ArenaAllocator* allocator) : JNIMacroAssemblerFwd(allocator), exception_blocks_(allocator->Adapter(kArenaAllocAssembler)) {} virtual ~ArmVIXLJNIMacroAssembler() {} void FinalizeCode() override; // // Overridden common assembler high-level functionality // // Emit code that will create an activation on the stack. void BuildFrame(size_t frame_size, ManagedRegister method_reg, ArrayRef callee_save_regs) override; // Emit code that will remove an activation from the stack. void RemoveFrame(size_t frame_size, ArrayRef callee_save_regs, bool may_suspend) override; void IncreaseFrameSize(size_t adjust) override; void DecreaseFrameSize(size_t adjust) override; // Store routines. void Store(FrameOffset offs, ManagedRegister src, size_t size) override; void StoreRef(FrameOffset dest, ManagedRegister src) override; void StoreRawPtr(FrameOffset dest, ManagedRegister src) override; void StoreImmediateToFrame(FrameOffset dest, uint32_t imm) override; void StoreStackOffsetToThread(ThreadOffset32 thr_offs, FrameOffset fr_offs) override; void StoreStackPointerToThread(ThreadOffset32 thr_offs) override; void StoreSpanning(FrameOffset dest, ManagedRegister src, FrameOffset in_off) override; // Load routines. void Load(ManagedRegister dest, FrameOffset src, size_t size) override; void LoadFromThread(ManagedRegister dest, ThreadOffset32 src, size_t size) override; void LoadRef(ManagedRegister dest, FrameOffset src) override; void LoadRef(ManagedRegister dest, ManagedRegister base, MemberOffset offs, bool unpoison_reference) override; void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) override; void LoadRawPtrFromThread(ManagedRegister dest, ThreadOffset32 offs) override; // Copying routines. void MoveArguments(ArrayRef dests, ArrayRef srcs) override; void Move(ManagedRegister dest, ManagedRegister src, size_t size) override; void CopyRawPtrFromThread(FrameOffset fr_offs, ThreadOffset32 thr_offs) override; void CopyRawPtrToThread(ThreadOffset32 thr_offs, FrameOffset fr_offs, ManagedRegister scratch) override; void CopyRef(FrameOffset dest, FrameOffset src) override; void CopyRef(FrameOffset dest, ManagedRegister base, MemberOffset offs, bool unpoison_reference) override; void Copy(FrameOffset dest, FrameOffset src, size_t size) override; void Copy(FrameOffset dest, ManagedRegister src_base, Offset src_offset, ManagedRegister scratch, size_t size) override; void Copy(ManagedRegister dest_base, Offset dest_offset, FrameOffset src, ManagedRegister scratch, size_t size) override; void Copy(FrameOffset dest, FrameOffset src_base, Offset src_offset, ManagedRegister scratch, size_t size) override; void Copy(ManagedRegister dest, Offset dest_offset, ManagedRegister src, Offset src_offset, ManagedRegister scratch, size_t size) override; void Copy(FrameOffset dest, Offset dest_offset, FrameOffset src, Offset src_offset, ManagedRegister scratch, size_t size) override; // Sign extension. void SignExtend(ManagedRegister mreg, size_t size) override; // Zero extension. void ZeroExtend(ManagedRegister mreg, size_t size) override; // Exploit fast access in managed code to Thread::Current(). void GetCurrentThread(ManagedRegister dest) override; void GetCurrentThread(FrameOffset dest_offset) override; // Set up out_reg to hold a Object** into the handle scope, or to be null if the // value is null and null_allowed. in_reg holds a possibly stale reference // that can be used to avoid loading the handle scope entry to see if the value is // null. void CreateHandleScopeEntry(ManagedRegister out_reg, FrameOffset handlescope_offset, ManagedRegister in_reg, bool null_allowed) override; // Set up out_off to hold a Object** into the handle scope, or to be null if the // value is null and null_allowed. void CreateHandleScopeEntry(FrameOffset out_off, FrameOffset handlescope_offset, bool null_allowed) override; // src holds a handle scope entry (Object**) load this into dst. void LoadReferenceFromHandleScope(ManagedRegister dst, ManagedRegister src) override; // Heap::VerifyObject on src. In some cases (such as a reference to this) we // know that src may not be null. void VerifyObject(ManagedRegister src, bool could_be_null) override; void VerifyObject(FrameOffset src, bool could_be_null) override; // Jump to address held at [base+offset] (used for tail calls). void Jump(ManagedRegister base, Offset offset) override; // Call to address held at [base+offset]. void Call(ManagedRegister base, Offset offset) override; void Call(FrameOffset base, Offset offset) override; void CallFromThread(ThreadOffset32 offset) override; // Generate code to check if Thread::Current()->exception_ is non-null // and branch to a ExceptionSlowPath if it is. void ExceptionPoll(size_t stack_adjust) override; // Create a new label that can be used with Jump/Bind calls. std::unique_ptr CreateLabel() override; // Emit an unconditional jump to the label. void Jump(JNIMacroLabel* label) override; // Emit a conditional jump to the label by applying a unary condition test to the GC marking flag. void TestGcMarking(JNIMacroLabel* label, JNIMacroUnaryCondition cond) override; // Code at this offset will serve as the target for the Jump call. void Bind(JNIMacroLabel* label) override; void MemoryBarrier(ManagedRegister scratch) override; void EmitExceptionPoll(ArmVIXLJNIMacroAssembler::ArmException *exception); void Load(ArmManagedRegister dest, vixl32::Register base, int32_t offset, size_t size); private: class ArmException { private: ArmException(vixl32::Register scratch, size_t stack_adjust) : scratch_(scratch), stack_adjust_(stack_adjust) {} vixl32::Label* Entry() { return &exception_entry_; } // Register used for passing Thread::Current()->exception_ . const vixl32::Register scratch_; // Stack adjust for ExceptionPool. const size_t stack_adjust_; vixl32::Label exception_entry_; friend class ArmVIXLJNIMacroAssembler; DISALLOW_COPY_AND_ASSIGN(ArmException); }; // List of exception blocks to generate at the end of the code cache. ArenaVector> exception_blocks_; // Used for testing. friend class ArmVIXLAssemblerTest_VixlLoadFromOffset_Test; friend class ArmVIXLAssemblerTest_VixlStoreToOffset_Test; }; class ArmVIXLJNIMacroLabel final : public JNIMacroLabelCommon { public: vixl32::Label* AsArm() { return AsPlatformLabel(); } }; } // namespace arm } // namespace art #endif // ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_