hotspot/src/os/windows/vm/decoder_windows.cpp
author simonis
Wed, 27 Feb 2013 09:40:30 +0100
changeset 15855 2ac9ebea17f3
parent 15186 1a255c84cf6a
child 19952 bc974e92f881
permissions -rw-r--r--
8008959: Fix non-PCH build on Linux, Windows and MacOS X Summary: Fix the build without precompiled headers by either including the missing ".inline.hpp" files into the appropriate files or by turning inline-functions declared in header files into ordinary functions in ".cpp" files. Reviewed-by: coleenp, stefank, dholmes
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/*
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 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "prims/jvm.h"
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#include "runtime/arguments.hpp"
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#include "decoder_windows.hpp"
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WindowsDecoder::WindowsDecoder() {
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  _dbghelp_handle = NULL;
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  _can_decode_in_vm = false;
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  _pfnSymGetSymFromAddr64 = NULL;
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  _pfnUndecorateSymbolName = NULL;
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  _decoder_status = no_error;
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  initialize();
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}
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void WindowsDecoder::initialize() {
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  if (!has_error() && _dbghelp_handle == NULL) {
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    HMODULE handle = ::LoadLibrary("dbghelp.dll");
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    if (!handle) {
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      _decoder_status = helper_not_found;
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      return;
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    }
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    _dbghelp_handle = handle;
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    pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions");
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    pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize");
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    _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64");
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    _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)::GetProcAddress(handle, "UnDecorateSymbolName");
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    if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) {
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      _pfnSymGetSymFromAddr64 = NULL;
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      _pfnUndecorateSymbolName = NULL;
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      ::FreeLibrary(handle);
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      _dbghelp_handle = NULL;
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      _decoder_status = helper_func_error;
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      return;
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    }
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    HANDLE hProcess = ::GetCurrentProcess();
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    _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_EXACT_SYMBOLS);
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    if (!_pfnSymInitialize(hProcess, NULL, TRUE)) {
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      _pfnSymGetSymFromAddr64 = NULL;
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      _pfnUndecorateSymbolName = NULL;
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      ::FreeLibrary(handle);
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      _dbghelp_handle = NULL;
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      _decoder_status = helper_init_error;
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      return;
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    }
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    // set pdb search paths
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    pfn_SymSetSearchPath  _pfn_SymSetSearchPath =
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      (pfn_SymSetSearchPath)::GetProcAddress(handle, "SymSetSearchPath");
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    pfn_SymGetSearchPath  _pfn_SymGetSearchPath =
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      (pfn_SymGetSearchPath)::GetProcAddress(handle, "SymGetSearchPath");
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    if (_pfn_SymSetSearchPath != NULL && _pfn_SymGetSearchPath != NULL) {
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      char paths[MAX_PATH];
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      int  len = sizeof(paths);
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      if (!_pfn_SymGetSearchPath(hProcess, paths, len)) {
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        paths[0] = '\0';
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      } else {
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        // available spaces in path buffer
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        len -= (int)strlen(paths);
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      }
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      char tmp_path[MAX_PATH];
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      DWORD dwSize;
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      HMODULE hJVM = ::GetModuleHandle("jvm.dll");
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      tmp_path[0] = '\0';
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      // append the path where jvm.dll is located
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      if (hJVM != NULL && (dwSize = ::GetModuleFileName(hJVM, tmp_path, sizeof(tmp_path))) > 0) {
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        while (dwSize > 0 && tmp_path[dwSize] != '\\') {
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          dwSize --;
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        }
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        tmp_path[dwSize] = '\0';
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        if (dwSize > 0 && len > (int)dwSize + 1) {
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          strncat(paths, os::path_separator(), 1);
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          strncat(paths, tmp_path, dwSize);
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          len -= dwSize + 1;
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        }
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      }
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      // append $JRE/bin. Arguments::get_java_home actually returns $JRE
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      // path
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      char *p = Arguments::get_java_home();
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      assert(p != NULL, "empty java home");
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      size_t java_home_len = strlen(p);
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      if (len > (int)java_home_len + 5) {
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        strncat(paths, os::path_separator(), 1);
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        strncat(paths, p, java_home_len);
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        strncat(paths, "\\bin", 4);
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        len -= (int)(java_home_len + 5);
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      }
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      // append $JDK/bin path if it exists
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      assert(java_home_len < MAX_PATH, "Invalid path length");
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      // assume $JRE is under $JDK, construct $JDK/bin path and
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      // see if it exists or not
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      if (strncmp(&p[java_home_len - 3], "jre", 3) == 0) {
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        strncpy(tmp_path, p, java_home_len - 3);
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        tmp_path[java_home_len - 3] = '\0';
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        strncat(tmp_path, "bin", 3);
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        // if the directory exists
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        DWORD dwAttrib = GetFileAttributes(tmp_path);
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        if (dwAttrib != INVALID_FILE_ATTRIBUTES &&
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            (dwAttrib & FILE_ATTRIBUTE_DIRECTORY)) {
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          // tmp_path should have the same length as java_home_len, since we only
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          // replaced 'jre' with 'bin'
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          if (len > (int)java_home_len + 1) {
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            strncat(paths, os::path_separator(), 1);
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            strncat(paths, tmp_path, java_home_len);
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          }
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        }
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      }
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      _pfn_SymSetSearchPath(hProcess, paths);
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    }
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     // find out if jvm.dll contains private symbols, by decoding
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     // current function and comparing the result
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     address addr = (address)Decoder::demangle;
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     char buf[MAX_PATH];
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     if (decode(addr, buf, sizeof(buf), NULL)) {
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       _can_decode_in_vm = !strcmp(buf, "Decoder::demangle");
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     }
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  }
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}
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void WindowsDecoder::uninitialize() {
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  _pfnSymGetSymFromAddr64 = NULL;
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  _pfnUndecorateSymbolName = NULL;
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  if (_dbghelp_handle != NULL) {
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    ::FreeLibrary(_dbghelp_handle);
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  }
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  _dbghelp_handle = NULL;
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}
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bool WindowsDecoder::can_decode_C_frame_in_vm() const {
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  return  (!has_error() && _can_decode_in_vm);
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}
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bool WindowsDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* modulepath)  {
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  if (_pfnSymGetSymFromAddr64 != NULL) {
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    PIMAGEHLP_SYMBOL64 pSymbol;
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    char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)];
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    pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo;
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    pSymbol->MaxNameLength = MAX_PATH;
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    pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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    DWORD64 displacement;
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    if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) {
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      if (buf != NULL) {
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        if (demangle(pSymbol->Name, buf, buflen)) {
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          jio_snprintf(buf, buflen, "%s", pSymbol->Name);
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        }
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      }
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      if(offset != NULL) *offset = (int)displacement;
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      return true;
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    }
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  }
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  if (buf != NULL && buflen > 0) buf[0] = '\0';
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  if (offset != NULL) *offset = -1;
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  return false;
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}
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bool WindowsDecoder::demangle(const char* symbol, char *buf, int buflen) {
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  return _pfnUndecorateSymbolName != NULL &&
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         _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE);
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}
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