dvander@47: /* vim: set ts=4 sw=4 tw=99 et:
dvander@47:  *
dvander@0:  * Copyright (C) 2012 David Anderson
dvander@0:  *
dvander@0:  * This file is part of JITCraft.
dvander@0:  *
dvander@0:  * JITCraft is free software: you can redistribute it and/or modify it under
dvander@0:  * the terms of the GNU General Public License as published by the Free
dvander@0:  * Software Foundation, either version 3 of the License, or (at your option)
dvander@0:  * any later version.
dvander@0:  * 
dvander@0:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
dvander@0:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
dvander@0:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
dvander@0:  *
dvander@0:  * You should have received a copy of the GNU General Public License along with
dvander@0:  * JITCraft. If not, see http://www.gnu.org/licenses/.
dvander@0:  */
dvander@0: #ifndef _include_jc_code_h_
dvander@0: #define _include_jc_code_h_
dvander@0: 
dvander@0: #include "Opcodes.h"
dvander@12: #include "Barriers.h"
dvander@12: #include "Heap.h"
dvander@12: #include "Types.h"
dvander@12: #include "FixedArray.h"
dvander@0: 
dvander@0: namespace jc {
dvander@0: 
dvander@0: class Module;
dvander@0: class Type;
dvander@0: 
dvander@13: // A code object contains the bytecode compiled from a function (or global
dvander@13: // script), as well as all information needed to interpret or JIT-compile
dvander@13: // the bytecode.
dvander@12: class Code : public Object
dvander@0: {
dvander@34:     Barriered<Module> module_;
dvander@34:     Barriered<ByteArray> bytecode_;
dvander@34:     Barriered<FixedArray> locals_;
dvander@34:     Barriered<FixedArray> objects_;
dvander@47:     Barriered<ByteArray> safepoints_;
dvander@13:     unsigned maxStackDepth_;
dvander@0: 
dvander@0:   public:
dvander@47:     static inline size_t BytesPerSafepoint(size_t stackDepth) {
dvander@47:         return (Align(stackDepth, 8) / 8) + sizeof(unsigned);
dvander@47:     }
dvander@47: 
dvander@47:   public:
dvander@34:     static Code *New(Zone *zone, Handle<ByteArray> bytecode, Handle<FixedArray> locals,
dvander@47:                      Handle<FixedArray> objects, unsigned maxStackDepth, Handle<Module> module,
dvander@47:                      Handle<ByteArray> safepoints);
dvander@12: 
dvander@12:     Module *module() {
dvander@13:         return module_;
dvander@12:     }
dvander@12:     bytecode *start() {
dvander@13:         return bytecode_->raw();
dvander@12:     }
dvander@12:     unsigned length() {
dvander@13:         return bytecode_->length();
dvander@12:     }
dvander@12:     Type *localType(size_t index) {
dvander@13:         return Type::cast(locals_->at(index));
dvander@12:     }
dvander@12:     unsigned nlocals() {
dvander@13:         return locals_->length();
dvander@12:     }
dvander@12:     unsigned maxStackDepth() {
dvander@13:         return maxStackDepth_;
dvander@12:     }
dvander@12:     Map *map(size_t index) {
dvander@21:         return Map::cast(objects_->at(index));
dvander@21:     }
dvander@21:     Object *object(size_t index) {
dvander@21:         return objects_->at(index);
dvander@0:     }
dvander@47:     ByteArray *safepoints() {
dvander@47:         return safepoints_;
dvander@47:     }
dvander@47:     uint8 *safepointAt(unsigned pcOffset);
dvander@47: 
dvander@47:     unsigned pcToOffset(bytecode *pc) {
dvander@47:         assert(pc >= start() && pc < start() + length());
dvander@47:         return pc - start();
dvander@47:     }
dvander@0: 
dvander@44:     // GC Descriptor.
dvander@44:     static inline size_t offsetOfModule() {
dvander@44:         return offsetof(Code, module_);
dvander@44:     }
dvander@44:     static inline size_t offsetOfBytecode() {
dvander@44:         return offsetof(Code, bytecode_);
dvander@44:     }
dvander@44:     static inline size_t offsetOfLocals() {
dvander@44:         return offsetof(Code, locals_);
dvander@44:     }
dvander@44:     static inline size_t offsetOfObjects() {
dvander@44:         return offsetof(Code, objects_);
dvander@44:     }
dvander@53:     static inline size_t offsetOfSafepoints() {
dvander@53:         return offsetof(Code, safepoints_);
dvander@53:     }
dvander@44:     // End GC Descriptor.
dvander@44: 
dvander@12:     static Code *cast(Object *obj) {
dvander@14:         assert(!obj || obj->is(MapKind_Code));
dvander@12:         return reinterpret_cast<Code *>(obj);
dvander@0:     }
dvander@0: };
dvander@0: 
dvander@0: }
dvander@0: 
dvander@0: #endif // _include_jc_code_h_