jdk8-mips64-public/hotspot: src/os/windows/vm/decoder_windows.cpp@4b7cf00ccb08 (annotated)

src/os/windows/vm/decoder_windows.cpp@4b7cf00ccb08 (annotated)

src/os/windows/vm/decoder_windows.cpp

Fri, 05 Apr 2013 11:15:13 -0700

author: ccheung
date: Fri, 05 Apr 2013 11:15:13 -0700
changeset 4893: 4b7cf00ccb08
parent 4675: 63e54c37ac64
child 5667: 38f750491293
permissions: -rw-r--r--

8006001: [parfait] Possible file leak in hotspot/src/os/linux/vm/perfMemory_linux.cpp
Reviewed-by: zgu, coleenp, hseigel, dholmes

 /*
  * Copyright (c) 1997, 2013, 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/arguments.hpp"
 #include "decoder_windows.hpp"
 WindowsDecoder::WindowsDecoder() {
   _dbghelp_handle = NULL;
   _can_decode_in_vm = false;
   _pfnSymGetSymFromAddr64 = NULL;
   _pfnUndecorateSymbolName = NULL;
   _decoder_status = no_error;
   initialize();
 }
 void WindowsDecoder::initialize() {
   if (!has_error() && _dbghelp_handle == NULL) {
     HMODULE handle = ::LoadLibrary("dbghelp.dll");
     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;
     }
     HANDLE hProcess = ::GetCurrentProcess();
     _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_EXACT_SYMBOLS);
     if (!_pfnSymInitialize(hProcess, NULL, TRUE)) {
       _pfnSymGetSymFromAddr64 = NULL;
       _pfnUndecorateSymbolName = NULL;
       ::FreeLibrary(handle);
       _dbghelp_handle = NULL;
       _decoder_status = helper_init_error;
       return;
     }
     // set pdb search paths
     pfn_SymSetSearchPath  _pfn_SymSetSearchPath =
       (pfn_SymSetSearchPath)::GetProcAddress(handle, "SymSetSearchPath");
     pfn_SymGetSearchPath  _pfn_SymGetSearchPath =
       (pfn_SymGetSearchPath)::GetProcAddress(handle, "SymGetSearchPath");
     if (_pfn_SymSetSearchPath != NULL && _pfn_SymGetSearchPath != NULL) {
       char paths[MAX_PATH];
       int  len = sizeof(paths);
       if (!_pfn_SymGetSearchPath(hProcess, paths, len)) {
         paths[0] = '\0';
       } else {
         // available spaces in path buffer
         len -= (int)strlen(paths);
       }
       char tmp_path[MAX_PATH];
       DWORD dwSize;
       HMODULE hJVM = ::GetModuleHandle("jvm.dll");
       tmp_path[0] = '\0';
       // append the path where jvm.dll is located
       if (hJVM != NULL && (dwSize = ::GetModuleFileName(hJVM, tmp_path, sizeof(tmp_path))) > 0) {
         while (dwSize > 0 && tmp_path[dwSize] != '\\') {
           dwSize --;
         }
         tmp_path[dwSize] = '\0';
         if (dwSize > 0 && len > (int)dwSize + 1) {
           strncat(paths, os::path_separator(), 1);
           strncat(paths, tmp_path, dwSize);
           len -= dwSize + 1;
         }
       }
       // append $JRE/bin. Arguments::get_java_home actually returns $JRE
       // path
       char *p = Arguments::get_java_home();
       assert(p != NULL, "empty java home");
       size_t java_home_len = strlen(p);
       if (len > (int)java_home_len + 5) {
         strncat(paths, os::path_separator(), 1);
         strncat(paths, p, java_home_len);
         strncat(paths, "\\bin", 4);
         len -= (int)(java_home_len + 5);
       }
       // append $JDK/bin path if it exists
       assert(java_home_len < MAX_PATH, "Invalid path length");
       // assume $JRE is under $JDK, construct $JDK/bin path and
       // see if it exists or not
       if (strncmp(&p[java_home_len - 3], "jre", 3) == 0) {
         strncpy(tmp_path, p, java_home_len - 3);
         tmp_path[java_home_len - 3] = '\0';
         strncat(tmp_path, "bin", 3);
         // if the directory exists
         DWORD dwAttrib = GetFileAttributes(tmp_path);
         if (dwAttrib != INVALID_FILE_ATTRIBUTES &&
             (dwAttrib & FILE_ATTRIBUTE_DIRECTORY)) {
           // tmp_path should have the same length as java_home_len, since we only
           // replaced 'jre' with 'bin'
           if (len > (int)java_home_len + 1) {
             strncat(paths, os::path_separator(), 1);
             strncat(paths, tmp_path, java_home_len);
           }
         }
       }
       _pfn_SymSetSearchPath(hProcess, paths);
     }
      // find out if jvm.dll contains private symbols, by decoding
      // current function and comparing the result
      address addr = (address)Decoder::demangle;
      char buf[MAX_PATH];
      if (decode(addr, buf, sizeof(buf), NULL)) {
        _can_decode_in_vm = !strcmp(buf, "Decoder::demangle");
      }
   }
 }
 void WindowsDecoder::uninitialize() {
   _pfnSymGetSymFromAddr64 = NULL;
   _pfnUndecorateSymbolName = NULL;
   if (_dbghelp_handle != NULL) {
     ::FreeLibrary(_dbghelp_handle);
   }
   _dbghelp_handle = NULL;
 }
 bool WindowsDecoder::can_decode_C_frame_in_vm() const {
   return  (!has_error() && _can_decode_in_vm);
 }
 bool WindowsDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* modulepath)  {
   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 true;
     }
   }
   if (buf != NULL && buflen > 0) buf[0] = '\0';
   if (offset != NULL) *offset = -1;
   return false;
 }
 bool WindowsDecoder::demangle(const char* symbol, char *buf, int buflen) {
   return _pfnUndecorateSymbolName != NULL &&
          _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os/windows/vm/decoder_windows.cpp@4b7cf00ccb08 (annotated)

src/os/windows/vm/decoder_windows.cpp