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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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