1 /* 2 * Copyright (C) 2016 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 #ifndef ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_ 18 #define ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_ 19 20 #include <android-base/logging.h> 21 22 #include "base/arena_containers.h" 23 #include "base/macros.h" 24 #include "constants_arm.h" 25 #include "offsets.h" 26 #include "utils/arm/assembler_arm_shared.h" 27 #include "utils/arm/assembler_arm_vixl.h" 28 #include "utils/arm/managed_register_arm.h" 29 #include "utils/assembler.h" 30 #include "utils/jni_macro_assembler.h" 31 32 namespace art { 33 namespace arm { 34 35 class ArmVIXLJNIMacroAssembler final 36 : public JNIMacroAssemblerFwd<ArmVIXLAssembler, PointerSize::k32> { 37 private: 38 class ArmException; 39 public: ArmVIXLJNIMacroAssembler(ArenaAllocator * allocator)40 explicit ArmVIXLJNIMacroAssembler(ArenaAllocator* allocator) 41 : JNIMacroAssemblerFwd(allocator), 42 exception_blocks_(allocator->Adapter(kArenaAllocAssembler)) {} 43 ~ArmVIXLJNIMacroAssembler()44 virtual ~ArmVIXLJNIMacroAssembler() {} 45 void FinalizeCode() override; 46 47 // 48 // Overridden common assembler high-level functionality 49 // 50 51 // Emit code that will create an activation on the stack. 52 void BuildFrame(size_t frame_size, 53 ManagedRegister method_reg, 54 ArrayRef<const ManagedRegister> callee_save_regs) override; 55 56 // Emit code that will remove an activation from the stack. 57 void RemoveFrame(size_t frame_size, 58 ArrayRef<const ManagedRegister> callee_save_regs, 59 bool may_suspend) override; 60 61 void IncreaseFrameSize(size_t adjust) override; 62 void DecreaseFrameSize(size_t adjust) override; 63 64 // Store routines. 65 void Store(FrameOffset offs, ManagedRegister src, size_t size) override; 66 void StoreRef(FrameOffset dest, ManagedRegister src) override; 67 void StoreRawPtr(FrameOffset dest, ManagedRegister src) override; 68 69 void StoreImmediateToFrame(FrameOffset dest, uint32_t imm) override; 70 71 void StoreStackOffsetToThread(ThreadOffset32 thr_offs, FrameOffset fr_offs) override; 72 73 void StoreStackPointerToThread(ThreadOffset32 thr_offs) override; 74 75 void StoreSpanning(FrameOffset dest, ManagedRegister src, FrameOffset in_off) override; 76 77 // Load routines. 78 void Load(ManagedRegister dest, FrameOffset src, size_t size) override; 79 80 void LoadFromThread(ManagedRegister dest, 81 ThreadOffset32 src, 82 size_t size) override; 83 84 void LoadRef(ManagedRegister dest, FrameOffset src) override; 85 86 void LoadRef(ManagedRegister dest, 87 ManagedRegister base, 88 MemberOffset offs, 89 bool unpoison_reference) override; 90 91 void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) override; 92 93 void LoadRawPtrFromThread(ManagedRegister dest, ThreadOffset32 offs) override; 94 95 // Copying routines. 96 void MoveArguments(ArrayRef<ArgumentLocation> dests, ArrayRef<ArgumentLocation> srcs) override; 97 98 void Move(ManagedRegister dest, ManagedRegister src, size_t size) override; 99 100 void CopyRawPtrFromThread(FrameOffset fr_offs, ThreadOffset32 thr_offs) override; 101 102 void CopyRawPtrToThread(ThreadOffset32 thr_offs, 103 FrameOffset fr_offs, 104 ManagedRegister scratch) override; 105 106 void CopyRef(FrameOffset dest, FrameOffset src) override; 107 void CopyRef(FrameOffset dest, 108 ManagedRegister base, 109 MemberOffset offs, 110 bool unpoison_reference) override; 111 112 void Copy(FrameOffset dest, FrameOffset src, size_t size) override; 113 114 void Copy(FrameOffset dest, 115 ManagedRegister src_base, 116 Offset src_offset, 117 ManagedRegister scratch, 118 size_t size) override; 119 120 void Copy(ManagedRegister dest_base, 121 Offset dest_offset, 122 FrameOffset src, 123 ManagedRegister scratch, 124 size_t size) override; 125 126 void Copy(FrameOffset dest, 127 FrameOffset src_base, 128 Offset src_offset, 129 ManagedRegister scratch, 130 size_t size) override; 131 132 void Copy(ManagedRegister dest, 133 Offset dest_offset, 134 ManagedRegister src, 135 Offset src_offset, 136 ManagedRegister scratch, 137 size_t size) override; 138 139 void Copy(FrameOffset dest, 140 Offset dest_offset, 141 FrameOffset src, 142 Offset src_offset, 143 ManagedRegister scratch, 144 size_t size) override; 145 146 // Sign extension. 147 void SignExtend(ManagedRegister mreg, size_t size) override; 148 149 // Zero extension. 150 void ZeroExtend(ManagedRegister mreg, size_t size) override; 151 152 // Exploit fast access in managed code to Thread::Current(). 153 void GetCurrentThread(ManagedRegister dest) override; 154 void GetCurrentThread(FrameOffset dest_offset) override; 155 156 // Set up `out_reg` to hold a `jobject` (`StackReference<Object>*` to a spilled value), 157 // or to be null if the value is null and `null_allowed`. `in_reg` holds a possibly 158 // stale reference that can be used to avoid loading the spilled value to 159 // see if the value is null. 160 void CreateJObject(ManagedRegister out_reg, 161 FrameOffset spilled_reference_offset, 162 ManagedRegister in_reg, 163 bool null_allowed) override; 164 165 // Set up `out_off` to hold a `jobject` (`StackReference<Object>*` to a spilled value), 166 // or to be null if the value is null and `null_allowed`. 167 void CreateJObject(FrameOffset out_off, 168 FrameOffset spilled_reference_offset, 169 bool null_allowed) override; 170 171 // Heap::VerifyObject on src. In some cases (such as a reference to this) we 172 // know that src may not be null. 173 void VerifyObject(ManagedRegister src, bool could_be_null) override; 174 void VerifyObject(FrameOffset src, bool could_be_null) override; 175 176 // Jump to address held at [base+offset] (used for tail calls). 177 void Jump(ManagedRegister base, Offset offset) override; 178 179 // Call to address held at [base+offset]. 180 void Call(ManagedRegister base, Offset offset) override; 181 void Call(FrameOffset base, Offset offset) override; 182 void CallFromThread(ThreadOffset32 offset) override; 183 184 // Generate code to check if Thread::Current()->exception_ is non-null 185 // and branch to a ExceptionSlowPath if it is. 186 void ExceptionPoll(size_t stack_adjust) override; 187 188 // Create a new label that can be used with Jump/Bind calls. 189 std::unique_ptr<JNIMacroLabel> CreateLabel() override; 190 // Emit an unconditional jump to the label. 191 void Jump(JNIMacroLabel* label) override; 192 // Emit a conditional jump to the label by applying a unary condition test to the GC marking flag. 193 void TestGcMarking(JNIMacroLabel* label, JNIMacroUnaryCondition cond) override; 194 // Code at this offset will serve as the target for the Jump call. 195 void Bind(JNIMacroLabel* label) override; 196 197 void MemoryBarrier(ManagedRegister scratch) override; 198 199 void EmitExceptionPoll(ArmVIXLJNIMacroAssembler::ArmException *exception); 200 void Load(ArmManagedRegister dest, vixl32::Register base, int32_t offset, size_t size); 201 202 private: 203 class ArmException { 204 private: ArmException(vixl32::Register scratch,size_t stack_adjust)205 ArmException(vixl32::Register scratch, size_t stack_adjust) 206 : scratch_(scratch), stack_adjust_(stack_adjust) {} 207 Entry()208 vixl32::Label* Entry() { return &exception_entry_; } 209 210 // Register used for passing Thread::Current()->exception_ . 211 const vixl32::Register scratch_; 212 213 // Stack adjust for ExceptionPool. 214 const size_t stack_adjust_; 215 216 vixl32::Label exception_entry_; 217 218 friend class ArmVIXLJNIMacroAssembler; 219 DISALLOW_COPY_AND_ASSIGN(ArmException); 220 }; 221 222 // List of exception blocks to generate at the end of the code cache. 223 ArenaVector<std::unique_ptr<ArmVIXLJNIMacroAssembler::ArmException>> exception_blocks_; 224 // Used for testing. 225 friend class ArmVIXLAssemblerTest_VixlLoadFromOffset_Test; 226 friend class ArmVIXLAssemblerTest_VixlStoreToOffset_Test; 227 }; 228 229 class ArmVIXLJNIMacroLabel final 230 : public JNIMacroLabelCommon<ArmVIXLJNIMacroLabel, 231 vixl32::Label, 232 InstructionSet::kArm> { 233 public: AsArm()234 vixl32::Label* AsArm() { 235 return AsPlatformLabel(); 236 } 237 }; 238 239 } // namespace arm 240 } // namespace art 241 242 #endif // ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_ 243