Added stack overflow check for RegExp analysis phase.

src/jsregexp.h

 // Copyright 2006-2008 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 1292 matching lines @@
 // result will be something like:
 //
 //   +-------+        +------------+
 //   |   .   |        |      .     |
 //   +-------+  --->  +------------+
 //   | word? |        | check word |
 //   +-------+        +------------+
 class Analysis: public NodeVisitor {
  public:
   explicit Analysis(bool ignore_case)
-      : ignore_case_(ignore_case) { }
+      : ignore_case_(ignore_case), error_message_(NULL) { }
   void EnsureAnalyzed(RegExpNode* node);
 
 #define DECLARE_VISIT(Type)                                          \
   virtual void Visit##Type(Type##Node* that);
 FOR_EACH_NODE_TYPE(DECLARE_VISIT)
 #undef DECLARE_VISIT
   virtual void VisitLoopChoice(LoopChoiceNode* that);
 
+  bool failed() { return error_message_ != NULL; }

[Christian Plesner Hansen, 2009/05/27 10:04:48]

Since this is a boolean predicate it should be 'has_failed'.

+  const char* error_message() {
+    ASSERT(error_message_ != NULL);
+    return error_message_;
+  }
+  void fail(const char* error_message) {
+    error_message_ = error_message;
+  }
  private:
   bool ignore_case_;
+  const char* error_message_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Analysis);
 };
 
 
 struct RegExpCompileData {
   RegExpCompileData()
     : tree(NULL),
       node(NULL),
       simple(true),
@@ skipping 30 matching lines @@
                                    Handle<String> pattern,
                                    bool is_ascii);
 
   static void DotPrint(const char* label, RegExpNode* node, bool ignore_case);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSREGEXP_H_