instruction_flags.h revision fc0e3219edc9a5bf81b166e82fd5db2796eb6a0d
1/* 2 * Copyright (C) 2011 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_VERIFIER_INSTRUCTION_FLAGS_H_ 18#define ART_RUNTIME_VERIFIER_INSTRUCTION_FLAGS_H_ 19 20#include "base/logging.h" 21 22#include <stdint.h> 23#include <string> 24 25namespace art { 26namespace verifier { 27 28class InstructionFlags { 29 public: 30 InstructionFlags() : length_(0), flags_(0) {} 31 32 void SetLengthInCodeUnits(size_t length) { 33 DCHECK_LT(length, 65536u); 34 length_ = length; 35 } 36 size_t GetLengthInCodeUnits() { 37 return length_; 38 } 39 bool IsOpcode() const { 40 return length_ != 0; 41 } 42 43 void SetInTry() { 44 flags_ |= 1 << kInTry; 45 } 46 void ClearInTry() { 47 flags_ &= ~(1 << kInTry); 48 } 49 bool IsInTry() const { 50 return (flags_ & (1 << kInTry)) != 0; 51 } 52 53 void SetBranchTarget() { 54 flags_ |= 1 << kBranchTarget; 55 } 56 void ClearBranchTarget() { 57 flags_ &= ~(1 << kBranchTarget); 58 } 59 bool IsBranchTarget() const { 60 return (flags_ & (1 << kBranchTarget)) != 0; 61 } 62 void SetCompileTimeInfoPoint() { 63 flags_ |= 1 << kCompileTimeInfoPoint; 64 } 65 void ClearCompileTimeInfoPoint() { 66 flags_ &= ~(1 << kCompileTimeInfoPoint); 67 } 68 bool IsCompileTimeInfoPoint() const { 69 return (flags_ & (1 << kCompileTimeInfoPoint)) != 0; 70 } 71 72 void SetVisited() { 73 flags_ |= 1 << kVisited; 74 } 75 void ClearVisited() { 76 flags_ &= ~(1 << kVisited); 77 } 78 bool IsVisited() const { 79 return (flags_ & (1 << kVisited)) != 0; 80 } 81 82 void SetChanged() { 83 flags_ |= 1 << kChanged; 84 } 85 void ClearChanged() { 86 flags_ &= ~(1 << kChanged); 87 } 88 bool IsChanged() const { 89 return (flags_ & (1 << kChanged)) != 0; 90 } 91 92 bool IsVisitedOrChanged() const { 93 return IsVisited() || IsChanged(); 94 } 95 96 std::string ToString() const; 97 98 private: 99 enum { 100 kInTry, 101 kBranchTarget, 102 kCompileTimeInfoPoint, // Location of interest to the compiler for GC maps and 103 // verifier based method sharpening. 104 kVisited, 105 kChanged, 106 }; 107 108 // Size of instruction in code units. 109 uint16_t length_; 110 uint8_t flags_; 111}; 112 113} // namespace verifier 114} // namespace art 115 116#endif // ART_RUNTIME_VERIFIER_INSTRUCTION_FLAGS_H_ 117