Initial implementation of printing the AST as a JSON string. This...

src/codegen.cc

 // Copyright 2009 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 122 matching lines @@
                                      bool is_eval) {
 #ifdef ENABLE_DISASSEMBLER
   bool print_code = Bootstrapper::IsActive()
       ? FLAG_print_builtin_code
       : FLAG_print_code;
 #endif
 
 #ifdef DEBUG
   bool print_source = false;
   bool print_ast = false;
+  bool print_json_ast = false;
   const char* ftype;
 
   if (Bootstrapper::IsActive()) {
     print_source = FLAG_print_builtin_source;
     print_ast = FLAG_print_builtin_ast;
+    print_json_ast = FLAG_print_builtin_json_ast;
     ftype = "builtin";
   } else {
     print_source = FLAG_print_source;
     print_ast = FLAG_print_ast;
+    print_json_ast = FLAG_print_json_ast;
     ftype = "user-defined";
   }
 
   if (FLAG_trace_codegen || print_source || print_ast) {
     PrintF("*** Generate code for %s function: ", ftype);
     flit->name()->ShortPrint();
     PrintF(" ***\n");
   }
 
   if (print_source) {
     PrintF("--- Source from AST ---\n%s\n", PrettyPrinter().PrintProgram(flit));
   }
 
   if (print_ast) {
     PrintF("--- AST ---\n%s\n", AstPrinter().PrintProgram(flit));
   }
+
+  if (print_json_ast) {
+    JsonAstBuilder builder;
+    PrintF("%s", builder.BuildProgram(flit));
+  }
 #endif  // DEBUG
 
   // Generate code.
   const int initial_buffer_size = 4 * KB;
   CodeGenerator cgen(initial_buffer_size, script, is_eval);
   CodeGeneratorScope scope(&cgen);
   cgen.GenCode(flit);
   if (cgen.HasStackOverflow()) {
     ASSERT(!Top::has_pending_exception());
     return Handle<Code>::null();
@@ skipping 356 matching lines @@
 void ArgumentsAccessStub::Generate(MacroAssembler* masm) {
   switch (type_) {
     case READ_LENGTH: GenerateReadLength(masm); break;
     case READ_ELEMENT: GenerateReadElement(masm); break;
     case NEW_OBJECT: GenerateNewObject(masm); break;
   }
 }
 
 
 } }  // namespace v8::internal