[interpreter] Implement exception handler table building.

src/interpreter/bytecode-array-builder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/interpreter/constant-array-builder.h"
+#include "src/interpreter/handler-table-builder.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 class Isolate;
 
 namespace interpreter {
 
 class BytecodeLabel;
@@ skipping 197 matching lines @@
   BytecodeArrayBuilder& Throw();
   BytecodeArrayBuilder& Return();
 
   // Complex flow control.
   BytecodeArrayBuilder& ForInPrepare(Register cache_info_triple);
   BytecodeArrayBuilder& ForInDone(Register index, Register cache_length);
   BytecodeArrayBuilder& ForInNext(Register receiver, Register index,
                                   Register cache_type_array_pair);
   BytecodeArrayBuilder& ForInStep(Register index);
 
+  // Exception handling.
+  BytecodeArrayBuilder& MarkHandler(int handler_id, bool will_catch);
+  BytecodeArrayBuilder& MarkTryBegin(int handler_id, Register context);
+  BytecodeArrayBuilder& MarkTryEnd(int handler_id);
+
+  // Creates a new handler table entry and returns a {hander_id} identifying the
+  // entry, so that it can be referenced by above exception handling support.
+  int NewHandlerEntry() { return handler_table_builder()->NewHandlerEntry(); }
+
   // Accessors
   Zone* zone() const { return zone_; }
 
  private:
   class PreviousBytecodeHelper;
   friend class BytecodeRegisterAllocator;
 
   static Bytecode BytecodeForBinaryOperation(Token::Value op);
   static Bytecode BytecodeForCountOperation(Token::Value op);
   static Bytecode BytecodeForCompareOperation(Token::Value op);
@@ skipping 70 matching lines @@
 
   ZoneVector<uint8_t>* bytecodes() { return &bytecodes_; }
   const ZoneVector<uint8_t>* bytecodes() const { return &bytecodes_; }
   Isolate* isolate() const { return isolate_; }
   ConstantArrayBuilder* constant_array_builder() {
     return &constant_array_builder_;
   }
   const ConstantArrayBuilder* constant_array_builder() const {
     return &constant_array_builder_;
   }
+  HandlerTableBuilder* handler_table_builder() {
+    return &handler_table_builder_;
+  }
 
   Isolate* isolate_;
   Zone* zone_;
   ZoneVector<uint8_t> bytecodes_;
   bool bytecode_generated_;
   ConstantArrayBuilder constant_array_builder_;
+  HandlerTableBuilder handler_table_builder_;
   size_t last_block_end_;
   size_t last_bytecode_start_;
   bool exit_seen_in_block_;
   int unbound_jumps_;
 
   int parameter_count_;
   int local_register_count_;
   int context_register_count_;
   int temporary_register_count_;
   ZoneSet<int> free_temporaries_;
@@ skipping 40 matching lines @@
   size_t offset_;
 
   friend class BytecodeArrayBuilder;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_