Mercurial > hg > graal-compiler
diff src/share/vm/interpreter/interpreter.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 98cb887364d3 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/interpreter/interpreter.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,134 @@ +/* + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// This file contains the platform-independant parts +// of the interpreter and the interpreter generator. + +//------------------------------------------------------------------------------------------------------------------------ +// An InterpreterCodelet is a piece of interpreter code. All +// interpreter code is generated into little codelets which +// contain extra information for debugging and printing purposes. + +class InterpreterCodelet: public Stub { + friend class VMStructs; + private: + int _size; // the size in bytes + const char* _description; // a description of the codelet, for debugging & printing + Bytecodes::Code _bytecode; // associated bytecode if any + + public: + // Initialization/finalization + void initialize(int size) { _size = size; } + void finalize() { ShouldNotCallThis(); } + + // General info/converters + int size() const { return _size; } + static int code_size_to_size(int code_size) { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; } + + // Code info + address code_begin() const { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); } + address code_end() const { return (address)this + size(); } + + // Debugging + void verify(); + void print(); + + // Interpreter-specific initialization + void initialize(const char* description, Bytecodes::Code bytecode); + + // Interpreter-specific attributes + int code_size() const { return code_end() - code_begin(); } + const char* description() const { return _description; } + Bytecodes::Code bytecode() const { return _bytecode; } +}; + +// Define a prototype interface +DEF_STUB_INTERFACE(InterpreterCodelet); + + +//------------------------------------------------------------------------------------------------------------------------ +// A CodeletMark serves as an automatic creator/initializer for Codelets +// (As a subclass of ResourceMark it automatically GC's the allocated +// code buffer and assemblers). + +class CodeletMark: ResourceMark { + private: + InterpreterCodelet* _clet; + InterpreterMacroAssembler** _masm; + CodeBuffer _cb; + + int codelet_size() { + // Request the whole code buffer (minus a little for alignment). + // The commit call below trims it back for each codelet. + int codelet_size = AbstractInterpreter::code()->available_space() - 2*K; + + // Guarantee there's a little bit of code space left. + guarantee (codelet_size > 0 && (size_t)codelet_size > 2*K, + "not enough space for interpreter generation"); + + return codelet_size; + } + + public: + CodeletMark( + InterpreterMacroAssembler*& masm, + const char* description, + Bytecodes::Code bytecode = Bytecodes::_illegal): + _clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())), + _cb(_clet->code_begin(), _clet->code_size()) + + { // request all space (add some slack for Codelet data) + assert (_clet != NULL, "we checked not enough space already"); + + // initialize Codelet attributes + _clet->initialize(description, bytecode); + // create assembler for code generation + masm = new InterpreterMacroAssembler(&_cb); + _masm = &masm; + } + + ~CodeletMark() { + // align so printing shows nop's instead of random code at the end (Codelets are aligned) + (*_masm)->align(wordSize); + // make sure all code is in code buffer + (*_masm)->flush(); + + + // commit Codelet + AbstractInterpreter::code()->commit((*_masm)->code()->pure_code_size()); + // make sure nobody can use _masm outside a CodeletMark lifespan + *_masm = NULL; + } +}; + +// Wrapper classes to produce Interpreter/InterpreterGenerator from either +// the c++ interpreter or the template interpreter. + +class Interpreter: public CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) { + + public: + // Debugging/printing + static InterpreterCodelet* codelet_containing(address pc) { return (InterpreterCodelet*)_code->stub_containing(pc); } +#include "incls/_interpreter_pd.hpp.incl" +};