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 26 #ifndef __DECODER_HPP 27 #define __DECODER_HPP 28 29 #include "memory/allocation.hpp" 30 31 #ifdef _WINDOWS 32 #include <windows.h> 33 #include <imagehlp.h> 34 35 // functions needed for decoding symbols 36 typedef DWORD (WINAPI *pfn_SymSetOptions)(DWORD); 37 typedef BOOL (WINAPI *pfn_SymInitialize)(HANDLE, PCTSTR, BOOL); 38 typedef BOOL (WINAPI *pfn_SymGetSymFromAddr64)(HANDLE, DWORD64, PDWORD64, PIMAGEHLP_SYMBOL64); 39 typedef DWORD (WINAPI *pfn_UndecorateSymbolName)(const char*, char*, DWORD, DWORD); 40 41 #else 42 43 class ElfFile; 44 45 #endif // _WINDOWS 46 47 48 class Decoder: public StackObj { 49 50 public: 51 // status code for decoding native C frame 52 enum decoder_status { 53 no_error, // successfully decoded frames 54 out_of_memory, // out of memory 55 file_invalid, // invalid elf file 56 file_not_found, // could not found symbol file (on windows), such as jvm.pdb or jvm.map 57 helper_not_found, // could not load dbghelp.dll (Windows only) 58 helper_func_error, // decoding functions not found (Windows only) 59 helper_init_error, // SymInitialize failed (Windows only) 60 symbol_not_found // could not find the symbol 61 }; 62 63 public: 64 Decoder() { initialize(); }; 65 ~Decoder() { uninitialize(); }; 66 67 static bool can_decode_C_frame_in_vm(); 68 69 static void initialize(); 70 static void uninitialize(); 71 72 #ifdef _WINDOWS 73 static decoder_status decode(address addr, char *buf, int buflen, int *offset); 74 #else 75 static decoder_status decode(address addr, const char* filepath, char *buf, int buflen, int *offset); 76 #endif 77 78 static bool demangle(const char* symbol, char *buf, int buflen); 79 80 static decoder_status get_status() { return _decoder_status; }; 81 82 #ifndef _WINDOWS 83 private: 84 static ElfFile* get_elf_file(const char* filepath); 85 #endif // _WINDOWS 86 87 88 private: 89 static decoder_status _decoder_status; 90 static bool _initialized; 91 92 #ifdef _WINDOWS 93 static HMODULE _dbghelp_handle; 94 static bool _can_decode_in_vm; 95 static pfn_SymGetSymFromAddr64 _pfnSymGetSymFromAddr64; 96 static pfn_UndecorateSymbolName _pfnUndecorateSymbolName; 97 #else 98 static ElfFile* _opened_elf_files; 99 #endif // _WINDOWS 100 }; 101 102 #endif // __DECODER_HPP