1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 29 #ifndef V8_BOOTSTRAPPER_H_ 30 #define V8_BOOTSTRAPPER_H_ 31 32 namespace v8 { 33 namespace internal { 34 35 // The Boostrapper is the public interface for creating a JavaScript global 36 // context. 37 class Bootstrapper : public AllStatic { 38 public: 39 // Requires: Heap::Setup has been called. 40 static void Initialize(bool create_heap_objects); 41 static void TearDown(); 42 43 // Creates a JavaScript Global Context with initial object graph. 44 // The returned value is a global handle casted to V8Environment*. 45 static Handle<Context> CreateEnvironment( 46 Handle<Object> global_object, 47 v8::Handle<v8::ObjectTemplate> global_template, 48 v8::ExtensionConfiguration* extensions); 49 50 // Detach the environment from its outer global object. 51 static void DetachGlobal(Handle<Context> env); 52 53 // Traverses the pointers for memory management. 54 static void Iterate(ObjectVisitor* v); 55 56 // Accessors for the native scripts cache. Used in lazy loading. 57 static Handle<String> NativesSourceLookup(int index); 58 static bool NativesCacheLookup(Vector<const char> name, 59 Handle<JSFunction>* handle); 60 static void NativesCacheAdd(Vector<const char> name, Handle<JSFunction> fun); 61 62 // Append code that needs fixup at the end of boot strapping. 63 static void AddFixup(Code* code, MacroAssembler* masm); 64 65 // Tells whether bootstrapping is active. 66 static bool IsActive(); 67 68 // Encoding/decoding support for fixup flags. 69 class FixupFlagsIsPCRelative: public BitField<bool, 0, 1> {}; 70 class FixupFlagsUseCodeObject: public BitField<bool, 1, 1> {}; 71 class FixupFlagsArgumentsCount: public BitField<uint32_t, 2, 32-2> {}; 72 73 // Support for thread preemption. 74 static int ArchiveSpacePerThread(); 75 static char* ArchiveState(char* to); 76 static char* RestoreState(char* from); 77 }; 78 79 }} // namespace v8::internal 80 81 #endif // V8_BOOTSTRAPPER_H_ 82