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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_INTERPRETER_INTERPRETER_H_ | 5 #ifndef V8_INTERPRETER_INTERPRETER_H_ |
6 #define V8_INTERPRETER_INTERPRETER_H_ | 6 #define V8_INTERPRETER_INTERPRETER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 // Clients of this interface shouldn't depend on lots of interpreter internals. | 10 // Clients of this interface shouldn't depend on lots of interpreter internals. |
11 // Do not include anything from src/interpreter other than | 11 // Do not include anything from src/interpreter other than |
12 // src/interpreter/bytecodes.h here! | 12 // src/interpreter/bytecodes.h here! |
13 #include "src/base/macros.h" | 13 #include "src/base/macros.h" |
14 #include "src/builtins/builtins.h" | 14 #include "src/builtins/builtins.h" |
15 #include "src/interpreter/bytecodes.h" | 15 #include "src/interpreter/bytecodes.h" |
16 #include "src/parsing/token.h" | 16 #include "src/parsing/token.h" |
17 #include "src/runtime/runtime.h" | 17 #include "src/runtime/runtime.h" |
18 | 18 |
19 namespace v8 { | 19 namespace v8 { |
20 namespace internal { | 20 namespace internal { |
21 | 21 |
22 class Isolate; | 22 class Isolate; |
23 class Callable; | 23 class Callable; |
24 class CompilationInfo; | 24 class CompilationInfo; |
25 class CompilationJob; | 25 class CompilationJob; |
26 class SetupIsolateDelegate; | |
27 | 26 |
28 namespace interpreter { | 27 namespace interpreter { |
29 | 28 |
30 class InterpreterAssembler; | 29 class InterpreterAssembler; |
31 | 30 |
32 class Interpreter { | 31 class Interpreter { |
33 public: | 32 public: |
34 explicit Interpreter(Isolate* isolate); | 33 explicit Interpreter(Isolate* isolate); |
35 virtual ~Interpreter() {} | 34 virtual ~Interpreter() {} |
36 | 35 |
| 36 // Initializes the interpreter dispatch table. |
| 37 void Initialize(); |
| 38 |
37 // Returns the interrupt budget which should be used for the profiler counter. | 39 // Returns the interrupt budget which should be used for the profiler counter. |
38 static int InterruptBudget(); | 40 static int InterruptBudget(); |
39 | 41 |
40 // Creates a compilation job which will generate bytecode for |info|. | 42 // Creates a compilation job which will generate bytecode for |info|. |
41 static CompilationJob* NewCompilationJob(CompilationInfo* info); | 43 static CompilationJob* NewCompilationJob(CompilationInfo* info); |
42 | 44 |
43 // Return bytecode handler for |bytecode|. | 45 // Return bytecode handler for |bytecode|. |
44 Code* GetBytecodeHandler(Bytecode bytecode, OperandScale operand_scale); | 46 Code* GetBytecodeHandler(Bytecode bytecode, OperandScale operand_scale); |
45 | 47 |
46 // GC support. | 48 // GC support. |
47 void IterateDispatchTable(ObjectVisitor* v); | 49 void IterateDispatchTable(ObjectVisitor* v); |
48 | 50 |
49 // Disassembler support (only useful with ENABLE_DISASSEMBLER defined). | 51 // Disassembler support (only useful with ENABLE_DISASSEMBLER defined). |
50 const char* LookupNameOfBytecodeHandler(Code* code); | 52 const char* LookupNameOfBytecodeHandler(Code* code); |
51 | 53 |
52 V8_EXPORT_PRIVATE Local<v8::Object> GetDispatchCountersObject(); | 54 V8_EXPORT_PRIVATE Local<v8::Object> GetDispatchCountersObject(); |
53 | 55 |
54 Address dispatch_table_address() { | 56 Address dispatch_table_address() { |
55 return reinterpret_cast<Address>(&dispatch_table_[0]); | 57 return reinterpret_cast<Address>(&dispatch_table_[0]); |
56 } | 58 } |
57 | 59 |
58 Address bytecode_dispatch_counters_table() { | 60 Address bytecode_dispatch_counters_table() { |
59 return reinterpret_cast<Address>(bytecode_dispatch_counters_table_.get()); | 61 return reinterpret_cast<Address>(bytecode_dispatch_counters_table_.get()); |
60 } | 62 } |
61 | 63 |
62 // TODO(ignition): Tune code size multiplier. | 64 // TODO(ignition): Tune code size multiplier. |
63 static const int kCodeSizeMultiplier = 24; | 65 static const int kCodeSizeMultiplier = 24; |
64 | 66 |
65 private: | 67 private: |
66 friend class SetupInterpreter; | 68 // In the case of bytecodes that share handler implementations, copy the code |
67 friend class v8::internal::SetupIsolateDelegate; | 69 // into the bytecode's dispatcher table entry and return true. |
| 70 bool ReuseExistingHandler(Bytecode bytecode, OperandScale operand_scale); |
| 71 |
| 72 // Generates handler for given |bytecode| and |operand_scale| |
| 73 // and installs it into the dispatch table. |
| 74 void InstallBytecodeHandler(Isolate* isolate, Bytecode bytecode, |
| 75 OperandScale operand_scale); |
68 | 76 |
69 uintptr_t GetDispatchCounter(Bytecode from, Bytecode to) const; | 77 uintptr_t GetDispatchCounter(Bytecode from, Bytecode to) const; |
70 | 78 |
71 // Get dispatch table index of bytecode. | 79 // Get dispatch table index of bytecode. |
72 static size_t GetDispatchTableIndex(Bytecode bytecode, | 80 static size_t GetDispatchTableIndex(Bytecode bytecode, |
73 OperandScale operand_scale); | 81 OperandScale operand_scale); |
74 | 82 |
75 bool IsDispatchTableInitialized(); | 83 bool IsDispatchTableInitialized(); |
| 84 bool ShouldInitializeDispatchTable(); |
76 | 85 |
77 static const int kNumberOfWideVariants = 3; | 86 static const int kNumberOfWideVariants = 3; |
78 static const int kDispatchTableSize = kNumberOfWideVariants * (kMaxUInt8 + 1); | 87 static const int kDispatchTableSize = kNumberOfWideVariants * (kMaxUInt8 + 1); |
79 static const int kNumberOfBytecodes = static_cast<int>(Bytecode::kLast) + 1; | 88 static const int kNumberOfBytecodes = static_cast<int>(Bytecode::kLast) + 1; |
80 | 89 |
81 Isolate* isolate_; | 90 Isolate* isolate_; |
82 Address dispatch_table_[kDispatchTableSize]; | 91 Address dispatch_table_[kDispatchTableSize]; |
83 std::unique_ptr<uintptr_t[]> bytecode_dispatch_counters_table_; | 92 std::unique_ptr<uintptr_t[]> bytecode_dispatch_counters_table_; |
84 | 93 |
85 DISALLOW_COPY_AND_ASSIGN(Interpreter); | 94 DISALLOW_COPY_AND_ASSIGN(Interpreter); |
86 }; | 95 }; |
87 | 96 |
88 } // namespace interpreter | 97 } // namespace interpreter |
89 } // namespace internal | 98 } // namespace internal |
90 } // namespace v8 | 99 } // namespace v8 |
91 | 100 |
92 #endif // V8_INTERPRETER_INTERPRETER_H_ | 101 #endif // V8_INTERPRETER_INTERPRETER_H_ |
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