Add a level of indirection to exception handler addresses.

src/ast.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 817 matching lines @@
   ZoneList<Label*>* targets() { return &targets_; }
   virtual bool IsInlineable() const;
 
  private:
   ZoneList<Label*> targets_;
 };
 
 
 class TryStatement: public Statement {
  public:
-  explicit TryStatement(Block* try_block)
-      : try_block_(try_block), escaping_targets_(NULL) { }
+  explicit TryStatement(int index, Block* try_block)
+      : index_(index),
+        try_block_(try_block),
+        escaping_targets_(NULL) {
+  }
 
   void set_escaping_targets(ZoneList<Label*>* targets) {
     escaping_targets_ = targets;
   }
 
+  int index() const { return index_; }
   Block* try_block() const { return try_block_; }
   ZoneList<Label*>* escaping_targets() const { return escaping_targets_; }
   virtual bool IsInlineable() const;
 
  private:
+  // Unique (per-function) index of this handler.  This is not an AST ID.
+  int index_;
+
   Block* try_block_;
   ZoneList<Label*>* escaping_targets_;
 };
 
 
 class TryCatchStatement: public TryStatement {
  public:
-  TryCatchStatement(Block* try_block,
+  TryCatchStatement(int index,
+                    Block* try_block,
                     Scope* scope,
                     Variable* variable,
                     Block* catch_block)
-      : TryStatement(try_block),
+      : TryStatement(index, try_block),
         scope_(scope),
         variable_(variable),
         catch_block_(catch_block) {
   }
 
   DECLARE_NODE_TYPE(TryCatchStatement)
 
   Scope* scope() { return scope_; }
   Variable* variable() { return variable_; }
   Block* catch_block() const { return catch_block_; }
   virtual bool IsInlineable() const;
 
  private:
   Scope* scope_;
   Variable* variable_;
   Block* catch_block_;
 };
 
 
 class TryFinallyStatement: public TryStatement {
  public:
-  TryFinallyStatement(Block* try_block, Block* finally_block)
-      : TryStatement(try_block),
+  TryFinallyStatement(int index, Block* try_block, Block* finally_block)
+      : TryStatement(index, try_block),
         finally_block_(finally_block) { }
 
   DECLARE_NODE_TYPE(TryFinallyStatement)
 
   Block* finally_block() const { return finally_block_; }
   virtual bool IsInlineable() const;
 
  private:
   Block* finally_block_;
 };
@@ skipping 742 matching lines @@
     NAMED_EXPRESSION,
     DECLARATION
   };
 
   FunctionLiteral(Isolate* isolate,
                   Handle<String> name,
                   Scope* scope,
                   ZoneList<Statement*>* body,
                   int materialized_literal_count,
                   int expected_property_count,
+                  int handler_count,
                   bool has_only_simple_this_property_assignments,
                   Handle<FixedArray> this_property_assignments,
                   int parameter_count,
                   Type type,
                   bool has_duplicate_parameters)
       : Expression(isolate),
         name_(name),
         scope_(scope),
         body_(body),
         this_property_assignments_(this_property_assignments),
         inferred_name_(isolate->factory()->empty_string()),
         materialized_literal_count_(materialized_literal_count),
         expected_property_count_(expected_property_count),
+        handler_count_(handler_count),
         parameter_count_(parameter_count),
         function_token_position_(RelocInfo::kNoPosition) {
     bitfield_ =
         HasOnlySimpleThisPropertyAssignments::encode(
             has_only_simple_this_property_assignments) |
         IsExpression::encode(type != DECLARATION) |
         IsAnonymous::encode(type == ANONYMOUS_EXPRESSION) |
         Pretenure::encode(false) |
         HasDuplicateParameters::encode(has_duplicate_parameters);
   }
 
   DECLARE_NODE_TYPE(FunctionLiteral)
 
   Handle<String> name() const { return name_; }
   Scope* scope() const { return scope_; }
   ZoneList<Statement*>* body() const { return body_; }
   void set_function_token_position(int pos) { function_token_position_ = pos; }
   int function_token_position() const { return function_token_position_; }
   int start_position() const;
   int end_position() const;
   bool is_expression() const { return IsExpression::decode(bitfield_); }
   bool is_anonymous() const { return IsAnonymous::decode(bitfield_); }
   bool strict_mode() const { return strict_mode_flag() == kStrictMode; }
   StrictModeFlag strict_mode_flag() const;
 
   int materialized_literal_count() { return materialized_literal_count_; }
   int expected_property_count() { return expected_property_count_; }
+  int handler_count() { return handler_count_; }
   bool has_only_simple_this_property_assignments() {
     return HasOnlySimpleThisPropertyAssignments::decode(bitfield_);
   }
   Handle<FixedArray> this_property_assignments() {
       return this_property_assignments_;
   }
   int parameter_count() { return parameter_count_; }
 
   bool AllowsLazyCompilation();
 
@@ skipping 17 matching lines @@
 
  private:
   Handle<String> name_;
   Scope* scope_;
   ZoneList<Statement*>* body_;
   Handle<FixedArray> this_property_assignments_;
   Handle<String> inferred_name_;
 
   int materialized_literal_count_;
   int expected_property_count_;
+  int handler_count_;
   int parameter_count_;
   int function_token_position_;
 
   unsigned bitfield_;
   class HasOnlySimpleThisPropertyAssignments: public BitField<bool, 0, 1> {};
   class IsExpression: public BitField<bool, 1, 1> {};
   class IsAnonymous: public BitField<bool, 2, 1> {};
   class Pretenure: public BitField<bool, 3, 1> {};
   class HasDuplicateParameters: public BitField<bool, 4, 1> {};
 };
@@ skipping 421 matching lines @@
 
  private:
   Isolate* isolate_;
   bool stack_overflow_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_