Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 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); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 74 | |
| 75 | // Compile a function boilerplate object (the function is possibly |
| 76 | // lazily compiled). Called recursively from a backend code |
| 77 | // generator 'caller' to build the boilerplate. |
| 78 | static Handle<JSFunction> BuildBoilerplate(FunctionLiteral* node, |
| 79 | Handle<Script> script, |
| 80 | AstVisitor* caller); |
| 81 | |
| 82 | // Set the function info for a newly compiled function. |
| 83 | static void SetFunctionInfo(Handle<JSFunction> fun, |
| 84 | FunctionLiteral* lit, |
| 85 | bool is_toplevel, |
| 86 | Handle<Script> script); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 87 | }; |
| 88 | |
| 89 | |
| 90 | // During compilation we need a global list of handles to constants |
| 91 | // for frame elements. When the zone gets deleted, we make sure to |
| 92 | // clear this list of handles as well. |
| 93 | class CompilationZoneScope : public ZoneScope { |
| 94 | public: |
| 95 | explicit CompilationZoneScope(ZoneScopeMode mode) : ZoneScope(mode) { } |
| 96 | virtual ~CompilationZoneScope() { |
| 97 | if (ShouldDeleteOnExit()) { |
| 98 | FrameElement::ClearConstantList(); |
| 99 | Result::ClearConstantList(); |
| 100 | } |
| 101 | } |
| 102 | }; |
| 103 | |
| 104 | |
| 105 | } } // namespace v8::internal |
| 106 | |
| 107 | #endif // V8_COMPILER_H_ |