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 #ifndef V8_COMPILER_H_ 29 #define V8_COMPILER_H_ 30 31 #include "frame-element.h" 32 #include "parser.h" 33 #include "zone.h" 34 35 namespace v8 { 36 namespace internal { 37 38 // The V8 compiler 39 // 40 // General strategy: Source code is translated into an anonymous function w/o 41 // parameters which then can be executed. If the source code contains other 42 // functions, they will be compiled and allocated as part of the compilation 43 // of the source code. 44 45 // Please note this interface returns function boilerplates. 46 // This means you need to call Factory::NewFunctionFromBoilerplate 47 // before you have a real function with context. 48 49 class Compiler : public AllStatic { 50 public: 51 enum ValidationState { VALIDATE_JSON, DONT_VALIDATE_JSON }; 52 53 // All routines return a JSFunction. 54 // If an error occurs an exception is raised and 55 // the return handle contains NULL. 56 57 // Compile a String source within a context. 58 static Handle<JSFunction> Compile(Handle<String> source, 59 Handle<Object> script_name, 60 int line_offset, int column_offset, 61 v8::Extension* extension, 62 ScriptDataImpl* script_Data); 63 64 // Compile a String source within a context for Eval. 65 static Handle<JSFunction> CompileEval(Handle<String> source, 66 Handle<Context> context, 67 bool is_global, 68 ValidationState validation); 69 70 // Compile from function info (used for lazy compilation). Returns 71 // true on success and false if the compilation resulted in a stack 72 // overflow. 73 static bool CompileLazy(Handle<SharedFunctionInfo> shared, int loop_nesting); 74 }; 75 76 77 // During compilation we need a global list of handles to constants 78 // for frame elements. When the zone gets deleted, we make sure to 79 // clear this list of handles as well. 80 class CompilationZoneScope : public ZoneScope { 81 public: CompilationZoneScope(ZoneScopeMode mode)82 explicit CompilationZoneScope(ZoneScopeMode mode) : ZoneScope(mode) { } ~CompilationZoneScope()83 virtual ~CompilationZoneScope() { 84 if (ShouldDeleteOnExit()) { 85 FrameElement::ClearConstantList(); 86 Result::ClearConstantList(); 87 } 88 } 89 }; 90 91 92 } } // namespace v8::internal 93 94 #endif // V8_COMPILER_H_ 95