| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_SNAPSHOT_NATIVES_H_ |
| #define V8_SNAPSHOT_NATIVES_H_ |
| |
| #include "include/v8.h" |
| #include "src/utils/vector.h" |
| #include "src/objects/objects.h" |
| |
| namespace v8 { class StartupData; } // Forward declaration. |
| |
| namespace v8 { |
| namespace internal { |
| |
| enum NativeType { |
| EXTRAS, |
| }; |
| |
| // Extra handling for V8_EXPORT_PRIVATE in combination with USING_V8_SHARED |
| // since definition of methods of classes marked as dllimport is not allowed. |
| template <NativeType type> |
| #ifdef USING_V8_SHARED |
| class NativesCollection { |
| #else |
| class V8_EXPORT_PRIVATE NativesCollection { |
| #endif // USING_V8_SHARED |
| |
| public: |
| // The following methods are implemented in js2c-generated code: |
| |
| // Number of built-in scripts. |
| static int GetBuiltinsCount(); |
| static int GetIndex(const char* name); |
| static Vector<const char> GetScriptSource(int index); |
| static Vector<const char> GetScriptName(int index); |
| static Vector<const char> GetScriptsSource(); |
| }; |
| |
| using ExtraNatives = NativesCollection<EXTRAS>; |
| |
| #ifdef V8_USE_EXTERNAL_STARTUP_DATA |
| // Used for reading the natives at runtime. Implementation in natives-empty.cc |
| void SetNativesFromFile(StartupData* natives_blob); |
| void ReadNatives(); |
| void DisposeNatives(); |
| #endif |
| |
| class NativesExternalStringResource final |
| : public v8::String::ExternalOneByteStringResource { |
| public: |
| NativesExternalStringResource(NativeType type, int index); |
| |
| const char* data() const override { return data_; } |
| size_t length() const override { return length_; } |
| |
| v8::String::ExternalOneByteStringResource* EncodeForSerialization() const { |
| DCHECK(type_ == EXTRAS); |
| intptr_t val = (index_ << 1) | 1; |
| val = val << kSystemPointerSizeLog2; // Pointer align. |
| return reinterpret_cast<v8::String::ExternalOneByteStringResource*>(val); |
| } |
| |
| // Decode from serialization. |
| static NativesExternalStringResource* DecodeForDeserialization( |
| const v8::String::ExternalOneByteStringResource* encoded) { |
| intptr_t val = |
| reinterpret_cast<intptr_t>(encoded) >> kSystemPointerSizeLog2; |
| DCHECK(val & 1); |
| int index = static_cast<int>(val >> 1); |
| return new NativesExternalStringResource(EXTRAS, index); |
| } |
| |
| private: |
| const char* data_; |
| size_t length_; |
| NativeType type_; |
| int index_; |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_SNAPSHOT_NATIVES_H_ |