1 /* 2 * Copyright (c) 1997, 2015, 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 #include "memory/resourceArea.hpp" 32 33 // This file contains the platform-independent parts 34 // of the interpreter and the interpreter generator. 35 36 class InterpreterMacroAssembler; 37 38 //------------------------------------------------------------------------------------------------------------------------ 39 // An InterpreterCodelet is a piece of interpreter code. All 40 // interpreter code is generated into little codelets which 41 // contain extra information for debugging and printing purposes. 42 43 class InterpreterCodelet: public Stub { 44 friend class VMStructs; 45 friend class CodeCacheDumper; // possible extension [do not remove] 46 private: 47 int _size; // the size in bytes 48 const char* _description; // a description of the codelet, for debugging & printing 49 Bytecodes::Code _bytecode; // associated bytecode if any 50 DEBUG_ONLY(CodeStrings _strings;) // Comments for annotating assembler output. 51 52 public: 53 // Initialization/finalization 54 void initialize(int size, 55 CodeStrings& strings) { _size = size; 56 DEBUG_ONLY(::new(&_strings) CodeStrings();) 57 DEBUG_ONLY(_strings.assign(strings);) } 58 void finalize() { ShouldNotCallThis(); } 59 60 // General info/converters 61 int size() const { return _size; } 62 static int code_size_to_size(int code_size) { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; } 63 64 // Code info 65 address code_begin() const { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); } 66 address code_end() const { return (address)this + size(); } 67 68 // Debugging 69 void verify(); 70 void print_on(outputStream* st) const; 71 void print() const { print_on(tty); } 72 73 // Interpreter-specific initialization 74 void initialize(const char* description, Bytecodes::Code bytecode); 75 76 // Interpreter-specific attributes 77 int code_size() const { return code_end() - code_begin(); } 78 const char* description() const { return _description; } 79 Bytecodes::Code bytecode() const { return _bytecode; } 80 }; 81 82 // Define a prototype interface 83 DEF_STUB_INTERFACE(InterpreterCodelet); 84 85 86 //------------------------------------------------------------------------------------------------------------------------ 87 // A CodeletMark serves as an automatic creator/initializer for Codelets 88 // (As a subclass of ResourceMark it automatically GC's the allocated 89 // code buffer and assemblers). 90 91 class CodeletMark: ResourceMark { 92 private: 93 InterpreterCodelet* _clet; 94 InterpreterMacroAssembler** _masm; 95 CodeBuffer _cb; 96 97 int codelet_size() { 98 // Request the whole code buffer (minus a little for alignment). 99 // The commit call below trims it back for each codelet. 100 int codelet_size = AbstractInterpreter::code()->available_space() - 2*K; 101 102 // Guarantee there's a little bit of code space left. 103 guarantee(codelet_size > 0 && (size_t)codelet_size > 2*K, 104 "not enough space for interpreter generation"); 105 106 return codelet_size; 107 } 108 109 public: 110 CodeletMark(InterpreterMacroAssembler*& masm, 111 const char* description, 112 Bytecodes::Code bytecode = Bytecodes::_illegal); 113 ~CodeletMark(); 114 }; 115 116 // Wrapper typedef to use the name Interpreter to mean either 117 // the c++ interpreter or the template interpreter. 118 119 typedef CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) Interpreter; 120 121 #endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP