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Side by Side Diff: runtime/vm/instructions_arm64.h

Issue 2392613002: Reapply "Lazy deopt without code patching." (Closed)
Patch Set: . Created 4 years, 2 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 // Classes that describe assembly patterns as used by inline caches. 4 // Classes that describe assembly patterns as used by inline caches.
5 5
6 #ifndef VM_INSTRUCTIONS_ARM64_H_ 6 #ifndef VM_INSTRUCTIONS_ARM64_H_
7 #define VM_INSTRUCTIONS_ARM64_H_ 7 #define VM_INSTRUCTIONS_ARM64_H_
8 8
9 #ifndef VM_INSTRUCTIONS_H_ 9 #ifndef VM_INSTRUCTIONS_H_
10 #error Do not include instructions_arm64.h directly; use instructions.h instead. 10 #error Do not include instructions_arm64.h directly; use instructions.h instead.
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57 57
58 class CallPattern : public ValueObject { 58 class CallPattern : public ValueObject {
59 public: 59 public:
60 CallPattern(uword pc, const Code& code); 60 CallPattern(uword pc, const Code& code);
61 61
62 RawICData* IcData(); 62 RawICData* IcData();
63 63
64 RawCode* TargetCode() const; 64 RawCode* TargetCode() const;
65 void SetTargetCode(const Code& target) const; 65 void SetTargetCode(const Code& target) const;
66 66
67 // This constant length is only valid for inserted call patterns used for
68 // lazy deoptimization. Regular call pattern may vary in length.
69 static const int kDeoptCallLengthInInstructions = 5;
70 static const int kDeoptCallLengthInBytes =
71 kDeoptCallLengthInInstructions * Instr::kInstrSize;
72
73 static void InsertDeoptCallAt(uword pc, uword target_address);
74
75 private: 67 private:
76 const ObjectPool& object_pool_; 68 const ObjectPool& object_pool_;
77 69
78 uword end_; 70 uword end_;
79 uword ic_data_load_end_; 71 uword ic_data_load_end_;
80 72
81 intptr_t target_code_pool_index_; 73 intptr_t target_code_pool_index_;
82 ICData& ic_data_; 74 ICData& ic_data_;
83 75
84 DISALLOW_COPY_AND_ASSIGN(CallPattern); 76 DISALLOW_COPY_AND_ASSIGN(CallPattern);
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142 134
143 bool IsValid() const; 135 bool IsValid() const;
144 136
145 private: 137 private:
146 const uword pc_; 138 const uword pc_;
147 }; 139 };
148 140
149 } // namespace dart 141 } // namespace dart
150 142
151 #endif // VM_INSTRUCTIONS_ARM64_H_ 143 #endif // VM_INSTRUCTIONS_ARM64_H_
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