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 #include "utilities/align.hpp" 33 34 // This file contains the platform-independent parts 35 // of the interpreter and the interpreter generator. 36 37 class InterpreterMacroAssembler; 38 39 //------------------------------------------------------------------------------------------------------------------------ 40 // An InterpreterCodelet is a piece of interpreter code. All 41 // interpreter code is generated into little codelets which 42 // contain extra information for debugging and printing purposes. 43 44 class InterpreterCodelet: public Stub { 45 friend class VMStructs; 46 friend class CodeCacheDumper; // possible extension [do not remove] 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; 57 DEBUG_ONLY(::new(&_strings) CodeStrings();) 58 DEBUG_ONLY(_strings.assign(strings);) } 59 void finalize() { ShouldNotCallThis(); } 60 61 // General info/converters 62 int size() const { return _size; } 63 static int code_size_to_size(int code_size) { return align_up((int)sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; } 64 65 // Code info 66 address code_begin() const { return (address)this + align_up(sizeof(InterpreterCodelet), CodeEntryAlignment); } 67 address code_end() const { return (address)this + size(); } 68 69 // Debugging 70 void verify(); 71 void print_on(outputStream* st) const; 72 void print() const { print_on(tty); } 73 74 // Interpreter-specific initialization 75 void initialize(const char* description, Bytecodes::Code bytecode); 76 77 // Interpreter-specific attributes 78 int code_size() const { return code_end() - code_begin(); } 79 const char* description() const { return _description; } 80 Bytecodes::Code bytecode() const { return _bytecode; } 81 }; 82 83 // Define a prototype interface 84 DEF_STUB_INTERFACE(InterpreterCodelet); 85 86 87 //------------------------------------------------------------------------------------------------------------------------ 88 // A CodeletMark serves as an automatic creator/initializer for Codelets 89 // (As a subclass of ResourceMark it automatically GC's the allocated 90 // code buffer and assemblers). 91 92 class CodeletMark: ResourceMark { 93 private: 94 InterpreterCodelet* _clet; 95 InterpreterMacroAssembler** _masm; 96 CodeBuffer _cb; 97 98 int codelet_size() { 99 // Request the whole code buffer (minus a little for alignment). 100 // The commit call below trims it back for each codelet. 101 int codelet_size = AbstractInterpreter::code()->available_space() - 2*K; 102 103 // Guarantee there's a little bit of code space left. 104 guarantee(codelet_size > 0 && (size_t)codelet_size > 2*K, 105 "not enough space for interpreter generation"); 106 107 return codelet_size; 108 } 109 110 public: 111 CodeletMark(InterpreterMacroAssembler*& masm, 112 const char* description, 113 Bytecodes::Code bytecode = Bytecodes::_illegal); 114 ~CodeletMark(); 115 }; 116 117 // Wrapper typedef to use the name Interpreter to mean either 118 // the c++ interpreter or the template interpreter. 119 120 typedef CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) Interpreter; 121 122 #endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP