1 /* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_INTERPRETER_INTERPRETER_HPP 26 #define SHARE_VM_INTERPRETER_INTERPRETER_HPP 27 28 #include "code/stubs.hpp" 29 #include "interpreter/cppInterpreter.hpp" 30 #include "interpreter/templateInterpreter.hpp" 31 #ifdef ZERO 32 #ifdef TARGET_ARCH_zero 33 # include "entry_zero.hpp" 34 #endif 35 #endif 36 37 // This file contains the platform-independent parts 38 // of the interpreter and the interpreter generator. 39 40 //------------------------------------------------------------------------------------------------------------------------ 41 // An InterpreterCodelet is a piece of interpreter code. All 42 // interpreter code is generated into little codelets which 43 // contain extra information for debugging and printing purposes. 44 45 class InterpreterCodelet: public Stub { 46 friend class VMStructs; 47 private: 48 int _size; // the size in bytes 49 const char* _description; // a description of the codelet, for debugging & printing 50 Bytecodes::Code _bytecode; // associated bytecode if any 51 52 public: 53 // Initialization/finalization 54 void initialize(int size) { _size = size; } 55 void finalize() { ShouldNotCallThis(); } 56 57 // General info/converters 58 int size() const { return _size; } 59 static int code_size_to_size(int code_size) { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; } 60 61 // Code info 62 address code_begin() const { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); } 63 address code_end() const { return (address)this + size(); } 64 65 // Debugging 66 void verify(); 67 void print_on(outputStream* st) const; 68 void print() const { print_on(tty); } 69 70 // Interpreter-specific initialization 71 void initialize(const char* description, Bytecodes::Code bytecode); 72 73 // Interpreter-specific attributes 74 int code_size() const { return code_end() - code_begin(); } 75 const char* description() const { return _description; } 76 Bytecodes::Code bytecode() const { return _bytecode; } 77 }; 78 79 // Define a prototype interface 80 DEF_STUB_INTERFACE(InterpreterCodelet); 81 82 83 //------------------------------------------------------------------------------------------------------------------------ 84 // A CodeletMark serves as an automatic creator/initializer for Codelets 85 // (As a subclass of ResourceMark it automatically GC's the allocated 86 // code buffer and assemblers). 87 88 class CodeletMark: ResourceMark { 89 private: 90 InterpreterCodelet* _clet; 91 InterpreterMacroAssembler** _masm; 92 CodeBuffer _cb; 93 94 int codelet_size() { 95 // Request the whole code buffer (minus a little for alignment). 96 // The commit call below trims it back for each codelet. 97 int codelet_size = AbstractInterpreter::code()->available_space() - 2*K; 98 99 // Guarantee there's a little bit of code space left. 100 guarantee (codelet_size > 0 && (size_t)codelet_size > 2*K, 101 "not enough space for interpreter generation"); 102 103 return codelet_size; 104 } 105 106 public: 107 CodeletMark( 108 InterpreterMacroAssembler*& masm, 109 const char* description, 110 Bytecodes::Code bytecode = Bytecodes::_illegal): 111 _clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())), 112 _cb(_clet->code_begin(), _clet->code_size()) 113 114 { // request all space (add some slack for Codelet data) 115 assert (_clet != NULL, "we checked not enough space already"); 116 117 // initialize Codelet attributes 118 _clet->initialize(description, bytecode); 119 // create assembler for code generation 120 masm = new InterpreterMacroAssembler(&_cb); 121 _masm = &masm; 122 } 123 124 ~CodeletMark() { 125 // align so printing shows nop's instead of random code at the end (Codelets are aligned) 126 (*_masm)->align(wordSize); 127 // make sure all code is in code buffer 128 (*_masm)->flush(); 129 130 131 // commit Codelet 132 AbstractInterpreter::code()->commit((*_masm)->code()->pure_insts_size()); 133 // make sure nobody can use _masm outside a CodeletMark lifespan 134 *_masm = NULL; 135 } 136 }; 137 138 // Wrapper classes to produce Interpreter/InterpreterGenerator from either 139 // the c++ interpreter or the template interpreter. 140 141 class Interpreter: public CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) { 142 143 public: 144 // Debugging/printing 145 static InterpreterCodelet* codelet_containing(address pc) { return (InterpreterCodelet*)_code->stub_containing(pc); } 146 #ifdef TARGET_ARCH_x86 147 # include "interpreter_x86.hpp" 148 #endif 149 #ifdef TARGET_ARCH_sparc 150 # include "interpreter_sparc.hpp" 151 #endif 152 #ifdef TARGET_ARCH_zero 153 # include "interpreter_zero.hpp" 154 #endif 155 156 }; 157 158 #endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP