Line data    Source code

       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
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_INTERPRETER_INTERPRETER_H_
       6             : #define V8_INTERPRETER_INTERPRETER_H_
       7             : 
       8             : #include <memory>
       9             : 
      10             : // Clients of this interface shouldn't depend on lots of interpreter internals.
      11             : // Do not include anything from src/interpreter other than
      12             : // src/interpreter/bytecodes.h here!
      13             : #include "src/base/macros.h"
      14             : #include "src/builtins/builtins.h"
      15             : #include "src/interpreter/bytecodes.h"
      16             : #include "src/parsing/token.h"
      17             : #include "src/runtime/runtime.h"
      18             : 
      19             : namespace v8 {
      20             : namespace internal {
      21             : 
      22             : class Isolate;
      23             : class Callable;
      24             : class CompilationInfo;
      25             : class CompilationJob;
      26             : class FunctionLiteral;
      27             : class ParseInfo;
      28             : class SetupIsolateDelegate;
      29             : class RootVisitor;
      30             : 
      31             : namespace interpreter {
      32             : 
      33             : class InterpreterAssembler;
      34             : 
      35             : class Interpreter {
      36             :  public:
      37             :   explicit Interpreter(Isolate* isolate);
      38      160095 :   virtual ~Interpreter() {}
      39             : 
      40             :   // Creates a compilation job which will generate bytecode for |literal|.
      41             :   static CompilationJob* NewCompilationJob(ParseInfo* parse_info,
      42             :                                            FunctionLiteral* literal,
      43             :                                            Isolate* isolate);
      44             : 
      45             :   // Return bytecode handler for |bytecode|.
      46             :   Code* GetBytecodeHandler(Bytecode bytecode, OperandScale operand_scale);
      47             : 
      48             :   // GC support.
      49             :   void IterateDispatchTable(RootVisitor* v);
      50             : 
      51             :   // Disassembler support (only useful with ENABLE_DISASSEMBLER defined).
      52             :   const char* LookupNameOfBytecodeHandler(Code* code);
      53             : 
      54             :   V8_EXPORT_PRIVATE Local<v8::Object> GetDispatchCountersObject();
      55             : 
      56             :   Address dispatch_table_address() {
      57             :     return reinterpret_cast<Address>(&dispatch_table_[0]);
      58             :   }
      59             : 
      60             :   Address bytecode_dispatch_counters_table() {
      61             :     return reinterpret_cast<Address>(bytecode_dispatch_counters_table_.get());
      62             :   }
      63             : 
      64             :   // The interrupt budget which should be used for the profiler counter.
      65             :   static const int kInterruptBudget = 144 * KB;
      66             : 
      67             :  private:
      68             :   friend class SetupInterpreter;
      69             :   friend class v8::internal::SetupIsolateDelegate;
      70             : 
      71             :   uintptr_t GetDispatchCounter(Bytecode from, Bytecode to) const;
      72             : 
      73             :   // Get dispatch table index of bytecode.
      74             :   static size_t GetDispatchTableIndex(Bytecode bytecode,
      75             :                                       OperandScale operand_scale);
      76             : 
      77             :   bool IsDispatchTableInitialized();
      78             : 
      79             :   static const int kNumberOfWideVariants = 3;
      80             :   static const int kDispatchTableSize = kNumberOfWideVariants * (kMaxUInt8 + 1);
      81             :   static const int kNumberOfBytecodes = static_cast<int>(Bytecode::kLast) + 1;
      82             : 
      83             :   Isolate* isolate_;
      84             :   Address dispatch_table_[kDispatchTableSize];
      85             :   std::unique_ptr<uintptr_t[]> bytecode_dispatch_counters_table_;
      86             : 
      87             :   DISALLOW_COPY_AND_ASSIGN(Interpreter);
      88             : };
      89             : 
      90             : }  // namespace interpreter
      91             : }  // namespace internal
      92             : }  // namespace v8
      93             : 
      94             : #endif  // V8_INTERPRETER_INTERPRETER_H_