Mercurial > hg > truffle
view src/os/windows/vm/decoder_windows.cpp @ 4456:f4c82dd4619e
inlining bugfixes and cleanup
author | Christian Haeubl <christian.haeubl@oracle.com> |
---|---|
date | Tue, 31 Jan 2012 11:37:16 -0800 |
parents | 5def270bc147 |
children | d7e3846464d0 |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "prims/jvm.h" #include "runtime/os.hpp" #include "utilities/decoder.hpp" HMODULE Decoder::_dbghelp_handle = NULL; bool Decoder::_can_decode_in_vm = false; pfn_SymGetSymFromAddr64 Decoder::_pfnSymGetSymFromAddr64 = NULL; pfn_UndecorateSymbolName Decoder::_pfnUndecorateSymbolName = NULL; void Decoder::initialize() { if (!_initialized) { _initialized = true; HINSTANCE handle = os::win32::load_Windows_dll("dbghelp.dll", NULL, 0); if (!handle) { _decoder_status = helper_not_found; return; } _dbghelp_handle = handle; pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions"); pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize"); _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64"); _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)GetProcAddress(handle, "UnDecorateSymbolName"); if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) { _pfnSymGetSymFromAddr64 = NULL; _pfnUndecorateSymbolName = NULL; ::FreeLibrary(handle); _dbghelp_handle = NULL; _decoder_status = helper_func_error; return; } _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS); if (!_pfnSymInitialize(GetCurrentProcess(), NULL, TRUE)) { _pfnSymGetSymFromAddr64 = NULL; _pfnUndecorateSymbolName = NULL; ::FreeLibrary(handle); _dbghelp_handle = NULL; _decoder_status = helper_init_error; return; } // find out if jvm.dll contains private symbols, by decoding // current function and comparing the result address addr = (address)Decoder::initialize; char buf[MAX_PATH]; if (decode(addr, buf, sizeof(buf), NULL) == no_error) { _can_decode_in_vm = !strcmp(buf, "Decoder::initialize"); } } } void Decoder::uninitialize() { assert(_initialized, "Decoder not yet initialized"); _pfnSymGetSymFromAddr64 = NULL; _pfnUndecorateSymbolName = NULL; if (_dbghelp_handle != NULL) { ::FreeLibrary(_dbghelp_handle); } _initialized = false; } bool Decoder::can_decode_C_frame_in_vm() { initialize(); return _can_decode_in_vm; } Decoder::decoder_status Decoder::decode(address addr, char *buf, int buflen, int *offset) { assert(_initialized, "Decoder not yet initialized"); if (_pfnSymGetSymFromAddr64 != NULL) { PIMAGEHLP_SYMBOL64 pSymbol; char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)]; pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo; pSymbol->MaxNameLength = MAX_PATH; pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64); DWORD64 displacement; if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) { if (buf != NULL) { if (!demangle(pSymbol->Name, buf, buflen)) { jio_snprintf(buf, buflen, "%s", pSymbol->Name); } } if (offset != NULL) *offset = (int)displacement; return no_error; } } return helper_not_found; } bool Decoder::demangle(const char* symbol, char *buf, int buflen) { assert(_initialized, "Decoder not yet initialized"); return _pfnUndecorateSymbolName != NULL && _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE); }