jdk8-mips64-public/hotspot: src/os/windows/vm/decoder

7003748: Decode C stack frames when symbols are presented (PhoneHome project)
Summary: Implemented in-process C native stack frame decoding when symbols are available.
Reviewed-by: coleenp, never

     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  */

    25 #include "precompiled.hpp"

    26 #include "prims/jvm.h"

    27 #include "utilities/decoder.hpp"

    29 HMODULE                   Decoder::_dbghelp_handle = NULL;

    30 bool                      Decoder::_can_decode_in_vm = false;

    31 pfn_SymGetSymFromAddr64   Decoder::_pfnSymGetSymFromAddr64 = NULL;

    32 pfn_UndecorateSymbolName  Decoder::_pfnUndecorateSymbolName = NULL;

    34 void Decoder::initialize() {

    35   if (!_initialized) {

    36     _initialized = true;

    38     HMODULE handle = ::LoadLibrary("dbghelp.dll");

    39     if (!handle) {

    40       _decoder_status = helper_not_found;

    41         return;

    42     }

    44     _dbghelp_handle = handle;

    46     pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions");

    47     pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize");

    48     _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64");

    49     _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)GetProcAddress(handle, "UnDecorateSymbolName");

    51     if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) {

    52       _pfnSymGetSymFromAddr64 = NULL;

    53       _pfnUndecorateSymbolName = NULL;

    54       ::FreeLibrary(handle);

    55       _dbghelp_handle = NULL;

    56       _decoder_status = helper_func_error;

    57       return;

    58     }

    60     _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);

    61     if (!_pfnSymInitialize(GetCurrentProcess(), NULL, TRUE)) {

    62       _pfnSymGetSymFromAddr64 = NULL;

    63       _pfnUndecorateSymbolName = NULL;

    64       ::FreeLibrary(handle);

    65       _dbghelp_handle = NULL;

    66       _decoder_status = helper_init_error;

    67       return;

    68     }

    70      // find out if jvm.dll contains private symbols, by decoding

    71      // current function and comparing the result

    72      address addr = (address)Decoder::initialize;

    73      char buf[MAX_PATH];

    74      if (decode(addr, buf, sizeof(buf), NULL) == no_error) {

    75        _can_decode_in_vm = !strcmp(buf, "Decoder::initialize");

    76      }

    77   }

    78 }

    80 void Decoder::uninitialize() {

    81   assert(_initialized, "Decoder not yet initialized");

    82   _pfnSymGetSymFromAddr64 = NULL;

    83   _pfnUndecorateSymbolName = NULL;

    84   if (_dbghelp_handle != NULL) {

    85     ::FreeLibrary(_dbghelp_handle);

    86   }

    87   _initialized = false;

    88 }

    90 bool Decoder::can_decode_C_frame_in_vm() {

    91   initialize();

    92   return  _can_decode_in_vm;

    93 }

    96 Decoder::decoder_status Decoder::decode(address addr, char *buf, int buflen, int *offset) {

    97   assert(_initialized, "Decoder not yet initialized");

    98   if (_pfnSymGetSymFromAddr64 != NULL) {

    99     PIMAGEHLP_SYMBOL64 pSymbol;

   100     char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)];

   101     pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo;

   102     pSymbol->MaxNameLength = MAX_PATH;

   103     pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);

   104     DWORD64 displacement;

   105     if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) {

   106       if (buf != NULL) {

   107         if (!demangle(pSymbol->Name, buf, buflen)) {

   108           jio_snprintf(buf, buflen, "%s", pSymbol->Name);

   109         }

   110       }

   111       if (offset != NULL) *offset = (int)displacement;

   112       return no_error;

   113     }

   114   }

   115   return helper_not_found;

   116 }

   118 bool Decoder::demangle(const char* symbol, char *buf, int buflen) {

   119   assert(_initialized, "Decoder not yet initialized");

   120   return _pfnUndecorateSymbolName != NULL &&

   121          _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE);

   122 }

src/os/windows/vm/decoder_windows.cpp@2d4762ec74af

src/os/windows/vm/decoder_windows.cpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/os/windows/vm/decoder_windows.cpp@2d4762ec74af

src/os/windows/vm/decoder_windows.cpp