Line data    Source code

       1             : // Copyright 2016 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/parsing.h"
       6             : 
       7             : #include <memory>
       8             : 
       9             : #include "src/ast/ast.h"
      10             : #include "src/objects-inl.h"
      11             : #include "src/parsing/parse-info.h"
      12             : #include "src/parsing/parser.h"
      13             : #include "src/parsing/scanner-character-streams.h"
      14             : #include "src/vm-state-inl.h"
      15             : #include "src/zone/zone-list-inl.h"  // crbug.com/v8/8816
      16             : 
      17             : namespace v8 {
      18             : namespace internal {
      19             : namespace parsing {
      20             : 
      21     1732536 : bool ParseProgram(ParseInfo* info, Isolate* isolate) {
      22             :   DCHECK(info->is_toplevel());
      23             :   DCHECK_NULL(info->literal());
      24             : 
      25             :   VMState<PARSER> state(isolate);
      26             : 
      27             :   // Create a character stream for the parser.
      28             :   Handle<String> source(String::cast(info->script()->source()), isolate);
      29     1732536 :   isolate->counters()->total_parse_size()->Increment(source->length());
      30             :   std::unique_ptr<Utf16CharacterStream> stream(
      31     1732536 :       ScannerStream::For(isolate, source));
      32     3465079 :   info->set_character_stream(std::move(stream));
      33             : 
      34     3465079 :   Parser parser(info);
      35             : 
      36             :   FunctionLiteral* result = nullptr;
      37             :   // Ok to use Isolate here; this function is only called in the main thread.
      38             :   DCHECK(parser.parsing_on_main_thread_);
      39             : 
      40     1732527 :   result = parser.ParseProgram(isolate, info);
      41             :   info->set_literal(result);
      42     1732526 :   if (result == nullptr) {
      43             :     info->pending_error_handler()->ReportErrors(isolate, info->script(),
      44      387631 :                                                 info->ast_value_factory());
      45             :   } else {
      46     1344895 :     info->set_language_mode(info->literal()->language_mode());
      47     1344896 :     if (info->is_eval()) {
      48             :       info->set_allow_eval_cache(parser.allow_eval_cache());
      49             :     }
      50             :   }
      51     1732527 :   parser.UpdateStatistics(isolate, info->script());
      52     3465072 :   return (result != nullptr);
      53             : }
      54             : 
      55      719836 : bool ParseFunction(ParseInfo* info, Handle<SharedFunctionInfo> shared_info,
      56             :                    Isolate* isolate) {
      57             :   DCHECK(!info->is_toplevel());
      58             :   DCHECK(!shared_info.is_null());
      59             :   DCHECK_NULL(info->literal());
      60             : 
      61             :   // Create a character stream for the parser.
      62             :   Handle<String> source(String::cast(info->script()->source()), isolate);
      63      719836 :   isolate->counters()->total_parse_size()->Increment(source->length());
      64             :   std::unique_ptr<Utf16CharacterStream> stream(
      65             :       ScannerStream::For(isolate, source, shared_info->StartPosition(),
      66     1439672 :                          shared_info->EndPosition()));
      67     1439669 :   info->set_character_stream(std::move(stream));
      68             : 
      69             :   VMState<PARSER> state(isolate);
      70             : 
      71     1439673 :   Parser parser(info);
      72             : 
      73             :   FunctionLiteral* result = nullptr;
      74             :   // Ok to use Isolate here; this function is only called in the main thread.
      75             :   DCHECK(parser.parsing_on_main_thread_);
      76             : 
      77      719834 :   result = parser.ParseFunction(isolate, info, shared_info);
      78             :   info->set_literal(result);
      79      719836 :   if (result == nullptr) {
      80             :     info->pending_error_handler()->ReportErrors(isolate, info->script(),
      81        4882 :                                                 info->ast_value_factory());
      82             :   } else {
      83      714954 :     info->ast_value_factory()->Internalize(isolate);
      84      714954 :     if (info->is_eval()) {
      85             :       info->set_allow_eval_cache(parser.allow_eval_cache());
      86             :     }
      87             :   }
      88      719836 :   parser.UpdateStatistics(isolate, info->script());
      89     1439676 :   return (result != nullptr);
      90             : }
      91             : 
      92      738745 : bool ParseAny(ParseInfo* info, Handle<SharedFunctionInfo> shared_info,
      93             :               Isolate* isolate) {
      94             :   DCHECK(!shared_info.is_null());
      95             :   return info->is_toplevel() ? ParseProgram(info, isolate)
      96      738745 :                              : ParseFunction(info, shared_info, isolate);
      97             : }
      98             : 
      99             : }  // namespace parsing
     100             : }  // namespace internal
     101      121996 : }  // namespace v8