1 /* 2 * Copyright (c) 2008, 2019, 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_COMPILER_DISASSEMBLER_HPP 26 #define SHARE_COMPILER_DISASSEMBLER_HPP 27 28 #include "utilities/globalDefinitions.hpp" 29 30 #include "asm/assembler.hpp" 31 #include "code/codeBlob.hpp" 32 #include "code/nmethod.hpp" 33 #include "compiler/abstractDisassembler.hpp" 34 #include "runtime/globals.hpp" 35 #include "utilities/macros.hpp" 36 37 class decode_env; 38 39 // The disassembler prints out assembly code annotated 40 // with Java specific information. 41 42 // Disassembler inherits from AbstractDisassembler 43 class Disassembler : public AbstractDisassembler { 44 friend class decode_env; 45 private: 46 // this is the type of the dll entry point: 47 typedef void* (*decode_func_virtual)(uintptr_t start_va, uintptr_t end_va, 48 unsigned char* buffer, uintptr_t length, 49 void* (*event_callback)(void*, const char*, void*), 50 void* event_stream, 51 int (*printf_callback)(void*, const char*, ...), 52 void* printf_stream, 53 const char* options, 54 int newline); 55 // points to the library. 56 static void* _library; 57 // bailout 58 static bool _tried_to_load_library; 59 static bool _library_usable; 60 // points to the decode function. 61 static decode_func_virtual _decode_instructions_virtual; 62 63 // tries to load library and return whether it succeeded. 64 // Allow (diagnostic) output redirection. 65 // No output at all if stream is NULL. Can be overridden 66 // with -Verbose flag, in which case output goes to tty. 67 static bool load_library(outputStream* st = NULL); 68 69 // Check if the two addresses are on the same page. is_same_page(address a1,address a2)70 static bool is_same_page(address a1, address a2) { 71 return (((uintptr_t)a1 ^ (uintptr_t)a2) & (~0x0fffUL)) == 0L; 72 } 73 74 // Machine dependent stuff 75 #include CPU_HEADER(disassembler) 76 77 public: 78 // We can always decode code blobs. 79 // Either we have a disassembler library available (successfully loaded) 80 // or we will resort to the abstract disassembler. This method informs 81 // about which decoding format is used. 82 // We can also enforce using the abstract disassembler. is_abstract()83 static bool is_abstract() { 84 if (!_tried_to_load_library) { 85 load_library(); 86 } 87 return ! _library_usable; 88 } 89 90 // Check out if we are doing a live disassembly or a post-mortem 91 // disassembly where the binary data was loaded from a hs_err file. is_decode_error_file()92 static bool is_decode_error_file() { 93 // Activate once post-mortem disassembly (from hs-err file) is available. 94 #if 0 95 return DecodeErrorFile && (strlen(DecodeErrorFile) != 0); 96 #else 97 return false; 98 #endif 99 } 100 101 // Directly disassemble code blob. 102 static void decode(CodeBlob *cb, outputStream* st = NULL); 103 // Directly disassemble nmethod. 104 static void decode(nmethod* nm, outputStream* st = NULL); 105 // Disassemble an arbitrary memory range. 106 static void decode(address start, address end, outputStream* st = NULL, const CodeStrings* = NULL); 107 108 static void _hook(const char* file, int line, class MacroAssembler* masm); 109 110 // This functions makes it easy to generate comments in the generated 111 // interpreter code, by riding on the customary __ macro in the interpreter generator. 112 // See templateTable_x86.cpp for an example. hook(const char * file,int line,T * masm)113 template<class T> inline static T* hook(const char* file, int line, T* masm) { 114 if (PrintInterpreter) { 115 _hook(file, line, masm); 116 } 117 return masm; 118 } 119 }; 120 121 #endif // SHARE_COMPILER_DISASSEMBLER_HPP 122