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

7186778: MachO decoder implementation for MacOSX
Summary: Implementation of decoder for Apple's MacOSX. The implementation is based on the patch provided by Kevin Walls.
Reviewed-by: coleenp, kamg, kevinw

     1 /*

     2  * Copyright (c) 1997, 2011, 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 "decoder_windows.hpp"

    29 WindowsDecoder::WindowsDecoder() {

    30   _dbghelp_handle = NULL;

    31   _can_decode_in_vm = false;

    32   _pfnSymGetSymFromAddr64 = NULL;

    33   _pfnUndecorateSymbolName = NULL;

    35   _decoder_status = no_error;

    36   initialize();

    37 }

    39 void WindowsDecoder::initialize() {

    40   if (!has_error() && _dbghelp_handle == NULL) {

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

    42     if (!handle) {

    43       _decoder_status = helper_not_found;

    44       return;

    45     }

    47     _dbghelp_handle = handle;

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

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

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

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

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

    55       _pfnSymGetSymFromAddr64 = NULL;

    56       _pfnUndecorateSymbolName = NULL;

    57       ::FreeLibrary(handle);

    58       _dbghelp_handle = NULL;

    59       _decoder_status = helper_func_error;

    60       return;

    61     }

    63     _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);

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

    65       _pfnSymGetSymFromAddr64 = NULL;

    66       _pfnUndecorateSymbolName = NULL;

    67       ::FreeLibrary(handle);

    68       _dbghelp_handle = NULL;

    69       _decoder_status = helper_init_error;

    70       return;

    71     }

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

    74      // current function and comparing the result

    75      address addr = (address)Decoder::demangle;

    76      char buf[MAX_PATH];

    77      if (decode(addr, buf, sizeof(buf), NULL)) {

    78        _can_decode_in_vm = !strcmp(buf, "Decoder::demangle");

    79      }

    80   }

    81 }

    83 void WindowsDecoder::uninitialize() {

    84   _pfnSymGetSymFromAddr64 = NULL;

    85   _pfnUndecorateSymbolName = NULL;

    86   if (_dbghelp_handle != NULL) {

    87     ::FreeLibrary(_dbghelp_handle);

    88   }

    89   _dbghelp_handle = NULL;

    90 }

    92 bool WindowsDecoder::can_decode_C_frame_in_vm() const {

    93   return  (!has_error() && _can_decode_in_vm);

    94 }

    97 bool WindowsDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* modulepath)  {

    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 true;

   113     }

   114   }

   115   if (buf != NULL && buflen > 0) buf[0] = '\0';

   116   if (offset != NULL) *offset = -1;

   117   return false;

   118 }

   120 bool WindowsDecoder::demangle(const char* symbol, char *buf, int buflen) {

   121   return _pfnUndecorateSymbolName != NULL &&

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

   123 }

src/os/windows/vm/decoder_windows.cpp@3b01d0321dfa

src/os/windows/vm/decoder_windows.cpp

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

src/os/windows/vm/decoder_windows.cpp@3b01d0321dfa

src/os/windows/vm/decoder_windows.cpp