1 /* 2 * Copyright (C) 2019 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_RUNTIME_NTERP_HELPERS_H_ 18 #define ART_RUNTIME_NTERP_HELPERS_H_ 19 20 #include "base/macros.h" 21 #include "quick/quick_method_frame_info.h" 22 23 namespace art HIDDEN { 24 25 class ArtMethod; 26 27 /** 28 * Returns the QuickMethodFrameInfo of the given frame corresponding to the 29 * given method. 30 */ 31 QuickMethodFrameInfo NterpFrameInfo(ArtMethod** frame) 32 REQUIRES_SHARED(Locks::mutator_lock_); 33 34 /** 35 * Returns the dex PC at which the given nterp frame is executing. 36 */ 37 uint32_t NterpGetDexPC(ArtMethod** frame) 38 REQUIRES_SHARED(Locks::mutator_lock_); 39 40 /** 41 * Returns the reference array to be used by the GC to visit references in an 42 * nterp frame. 43 */ 44 uintptr_t NterpGetReferenceArray(ArtMethod** frame) 45 REQUIRES_SHARED(Locks::mutator_lock_); 46 47 /** 48 * Returns the dex register array to be used by the GC to update references in 49 * an nterp frame. 50 */ 51 uintptr_t NterpGetRegistersArray(ArtMethod** frame) 52 REQUIRES_SHARED(Locks::mutator_lock_); 53 54 /** 55 * Returns the nterp landing pad for catching an exception. 56 */ 57 uintptr_t NterpGetCatchHandler(); 58 59 /** 60 * Returns the value of dex register number `vreg` in the given frame. 61 */ 62 uint32_t NterpGetVReg(ArtMethod** frame, uint16_t vreg) 63 REQUIRES_SHARED(Locks::mutator_lock_); 64 65 /** 66 * Returns the value of dex register number `vreg` in the given frame if it is a 67 * reference. Return 0 otehrwise. 68 */ 69 uint32_t NterpGetVRegReference(ArtMethod** frame, uint16_t vreg) 70 REQUIRES_SHARED(Locks::mutator_lock_); 71 72 /** 73 * Returns whether the given method can run with nterp. The instruction set can 74 * be passed for cross-compilation. 75 */ 76 EXPORT bool CanMethodUseNterp(ArtMethod* method, InstructionSet isa = kRuntimeISA) 77 REQUIRES_SHARED(Locks::mutator_lock_); 78 79 /** 80 * Returns kAccNterpInvokeFastPathFlag and/or kAccNterpEntryPointFastPathFlag, if appropriate. 81 */ 82 uint32_t GetNterpFastPathFlags(std::string_view shorty, uint32_t access_flags, InstructionSet isa); 83 84 } // namespace art 85 86 #endif // ART_RUNTIME_NTERP_HELPERS_H_ 87