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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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5972 return NULL; | 5972 return NULL; |
5973 } | 5973 } |
5974 | 5974 |
5975 // Extract the accumulated data from the recorder as a single | 5975 // Extract the accumulated data from the recorder as a single |
5976 // contiguous vector that we are responsible for disposing. | 5976 // contiguous vector that we are responsible for disposing. |
5977 Vector<unsigned> store = recorder->ExtractData(); | 5977 Vector<unsigned> store = recorder->ExtractData(); |
5978 return new ScriptDataImpl(store); | 5978 return new ScriptDataImpl(store); |
5979 } | 5979 } |
5980 | 5980 |
5981 | 5981 |
5982 // Preparse, but only collect data that is immediately useful, | |
5983 // even if the preparser data is only used once. | |
5984 ScriptDataImpl* ParserApi::PartialPreParse(Handle<String> source, | |
5985 v8::Extension* extension, | |
5986 int flags) { | |
5987 bool allow_lazy = FLAG_lazy && (extension == NULL); | |
5988 if (!allow_lazy) { | |
5989 // Partial preparsing is only about lazily compiled functions. | |
5990 // If we don't allow lazy compilation, the log data will be empty. | |
5991 return NULL; | |
5992 } | |
5993 flags |= kAllowLazy; | |
5994 PartialParserRecorder recorder; | |
5995 int source_length = source->length(); | |
5996 if (source->IsExternalTwoByteString()) { | |
5997 ExternalTwoByteStringUtf16CharacterStream stream( | |
5998 Handle<ExternalTwoByteString>::cast(source), 0, source_length); | |
5999 return DoPreParse(&stream, flags, &recorder); | |
6000 } else { | |
6001 GenericStringUtf16CharacterStream stream(source, 0, source_length); | |
6002 return DoPreParse(&stream, flags, &recorder); | |
6003 } | |
6004 } | |
6005 | |
6006 | |
6007 ScriptDataImpl* ParserApi::PreParse(Utf16CharacterStream* source, | 5982 ScriptDataImpl* ParserApi::PreParse(Utf16CharacterStream* source, |
6008 v8::Extension* extension, | 5983 v8::Extension* extension, |
6009 int flags) { | 5984 int flags) { |
6010 Handle<Script> no_script; | 5985 Handle<Script> no_script; |
6011 if (FLAG_lazy && (extension == NULL)) { | 5986 if (FLAG_lazy && (extension == NULL)) { |
6012 flags |= kAllowLazy; | 5987 flags |= kAllowLazy; |
6013 } | 5988 } |
6014 CompleteParserRecorder recorder; | 5989 CompleteParserRecorder recorder; |
6015 return DoPreParse(source, flags, &recorder); | 5990 return DoPreParse(source, flags, &recorder); |
6016 } | 5991 } |
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6078 ASSERT(info->isolate()->has_pending_exception()); | 6053 ASSERT(info->isolate()->has_pending_exception()); |
6079 } else { | 6054 } else { |
6080 result = parser.ParseProgram(); | 6055 result = parser.ParseProgram(); |
6081 } | 6056 } |
6082 } | 6057 } |
6083 info->SetFunction(result); | 6058 info->SetFunction(result); |
6084 return (result != NULL); | 6059 return (result != NULL); |
6085 } | 6060 } |
6086 | 6061 |
6087 } } // namespace v8::internal | 6062 } } // namespace v8::internal |
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