1 /* 2 * Copyright (c) 1997, 2012, 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 DEBUG_ONLY(CodeStrings _strings;) // Comments for annotating assembler output. 52 53 public: 54 // Initialization/finalization 55 void initialize(int size, 56 CodeStrings& strings) { _size = size; DEBUG_ONLY(_strings.assign(strings);) } 57 void finalize() { ShouldNotCallThis(); } 58 59 // General info/converters 60 int size() const { return _size; } 61 static int code_size_to_size(int code_size) { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; } 62 63 // Code info 64 address code_begin() const { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); } 65 address code_end() const { return (address)this + size(); } 66 67 // Debugging 68 void verify(); 69 void print_on(outputStream* st) const; 70 void print() const { print_on(tty); } 71 72 // Interpreter-specific initialization 73 void initialize(const char* description, Bytecodes::Code bytecode); 74 75 // Interpreter-specific attributes 76 int code_size() const { return code_end() - code_begin(); } 77 const char* description() const { return _description; } 78 Bytecodes::Code bytecode() const { return _bytecode; } 79 }; 80 81 // Define a prototype interface 82 DEF_STUB_INTERFACE(InterpreterCodelet); 83 84 85 //------------------------------------------------------------------------------------------------------------------------ 86 // A CodeletMark serves as an automatic creator/initializer for Codelets 87 // (As a subclass of ResourceMark it automatically GC's the allocated 88 // code buffer and assemblers). 89 90 class CodeletMark: ResourceMark { 91 private: 92 InterpreterCodelet* _clet; 93 InterpreterMacroAssembler** _masm; 94 CodeBuffer _cb; 95 96 int codelet_size() { 97 // Request the whole code buffer (minus a little for alignment). 98 // The commit call below trims it back for each codelet. 99 int codelet_size = AbstractInterpreter::code()->available_space() - 2*K; 100 101 // Guarantee there's a little bit of code space left. 102 guarantee (codelet_size > 0 && (size_t)codelet_size > 2*K, 103 "not enough space for interpreter generation"); 104 105 return codelet_size; 106 } 107 108 public: 109 CodeletMark( 110 InterpreterMacroAssembler*& masm, 111 const char* description, 112 Bytecodes::Code bytecode = Bytecodes::_illegal): 113 _clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())), 114 _cb(_clet->code_begin(), _clet->code_size()) 115 116 { // request all space (add some slack for Codelet data) 117 assert (_clet != NULL, "we checked not enough space already"); 118 119 // initialize Codelet attributes 120 _clet->initialize(description, bytecode); 121 // create assembler for code generation 122 masm = new InterpreterMacroAssembler(&_cb); 123 _masm = &masm; 124 } 125 126 ~CodeletMark() { 127 // align so printing shows nop's instead of random code at the end (Codelets are aligned) 128 (*_masm)->align(wordSize); 129 // make sure all code is in code buffer 130 (*_masm)->flush(); 131 132 133 // commit Codelet 134 AbstractInterpreter::code()->commit((*_masm)->code()->pure_insts_size(), (*_masm)->code()->strings()); 135 // make sure nobody can use _masm outside a CodeletMark lifespan 136 *_masm = NULL; 137 } 138 }; 139 140 // Wrapper classes to produce Interpreter/InterpreterGenerator from either 141 // the c++ interpreter or the template interpreter. 142 143 class Interpreter: public CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) { 144 145 public: 146 // Debugging/printing 147 static InterpreterCodelet* codelet_containing(address pc) { return (InterpreterCodelet*)_code->stub_containing(pc); } 148 #ifdef TARGET_ARCH_x86 149 # include "interpreter_x86.hpp" 150 #endif 151 #ifdef TARGET_ARCH_sparc 152 # include "interpreter_sparc.hpp" 153 #endif 154 #ifdef TARGET_ARCH_zero 155 # include "interpreter_zero.hpp" 156 #endif 157 #ifdef TARGET_ARCH_arm 158 # include "interpreter_arm.hpp" 159 #endif 160 #ifdef TARGET_ARCH_ppc 161 # include "interpreter_ppc.hpp" 162 #endif 163 164 }; 165 166 #endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP