Home | History | Annotate | Download | only in parsing 
      1 // Copyright 2010 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 #include "src/parsing/preparse-data.h"
      6 #include "src/base/hashmap.h"
      7 #include "src/base/logging.h"
      8 #include "src/globals.h"
      9 #include "src/parsing/parser.h"
     10 #include "src/parsing/preparse-data-format.h"
     11 
     12 namespace v8 {
     13 namespace internal {
     14 
     15 
     16 CompleteParserRecorder::CompleteParserRecorder() {
     17   preamble_[PreparseDataConstants::kMagicOffset] =
     18       PreparseDataConstants::kMagicNumber;
     19   preamble_[PreparseDataConstants::kVersionOffset] =
     20       PreparseDataConstants::kCurrentVersion;
     21   preamble_[PreparseDataConstants::kHasErrorOffset] = false;
     22   preamble_[PreparseDataConstants::kFunctionsSizeOffset] = 0;
     23   preamble_[PreparseDataConstants::kSizeOffset] = 0;
     24   DCHECK_EQ(5, PreparseDataConstants::kHeaderSize);
     25 #ifdef DEBUG
     26   prev_start_ = -1;
     27 #endif
     28 }
     29 
     30 
     31 void CompleteParserRecorder::LogMessage(int start_pos, int end_pos,
     32                                         MessageTemplate::Template message,
     33                                         const char* arg_opt,
     34                                         ParseErrorType error_type) {
     35   if (HasError()) return;
     36   preamble_[PreparseDataConstants::kHasErrorOffset] = true;
     37   function_store_.Reset();
     38   STATIC_ASSERT(PreparseDataConstants::kMessageStartPos == 0);
     39   function_store_.Add(start_pos);
     40   STATIC_ASSERT(PreparseDataConstants::kMessageEndPos == 1);
     41   function_store_.Add(end_pos);
     42   STATIC_ASSERT(PreparseDataConstants::kMessageArgCountPos == 2);
     43   function_store_.Add((arg_opt == NULL) ? 0 : 1);
     44   STATIC_ASSERT(PreparseDataConstants::kParseErrorTypePos == 3);
     45   function_store_.Add(error_type);
     46   STATIC_ASSERT(PreparseDataConstants::kMessageTemplatePos == 4);
     47   function_store_.Add(static_cast<unsigned>(message));
     48   STATIC_ASSERT(PreparseDataConstants::kMessageArgPos == 5);
     49   if (arg_opt != NULL) WriteString(CStrVector(arg_opt));
     50 }
     51 
     52 
     53 void CompleteParserRecorder::WriteString(Vector<const char> str) {
     54   function_store_.Add(str.length());
     55   for (int i = 0; i < str.length(); i++) {
     56     function_store_.Add(str[i]);
     57   }
     58 }
     59 
     60 
     61 ScriptData* CompleteParserRecorder::GetScriptData() {
     62   int function_size = function_store_.size();
     63   int total_size = PreparseDataConstants::kHeaderSize + function_size;
     64   unsigned* data = NewArray<unsigned>(total_size);
     65   preamble_[PreparseDataConstants::kFunctionsSizeOffset] = function_size;
     66   MemCopy(data, preamble_, sizeof(preamble_));
     67   if (function_size > 0) {
     68     function_store_.WriteTo(Vector<unsigned>(
     69         data + PreparseDataConstants::kHeaderSize, function_size));
     70   }
     71   DCHECK(IsAligned(reinterpret_cast<intptr_t>(data), kPointerAlignment));
     72   ScriptData* result = new ScriptData(reinterpret_cast<byte*>(data),
     73                                       total_size * sizeof(unsigned));
     74   result->AcquireDataOwnership();
     75   return result;
     76 }
     77 
     78 
     79 }  // namespace internal
     80 }  // namespace v8.
     81