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

7117303: VM uses non-monotonic time source and complains that it is non-monotonic
Summary: Replaces calls to os::javaTimeMillis(), which does not (and cannot) guarantee monotonicity, in GC code to an equivalent expression that uses os::javaTimeNanos(). os::javaTimeNanos is guaranteed monotonically non-decreasing if the underlying platform provides a monotonic time source. Changes in OS files are to make use of the newly defined constants in globalDefinitions.hpp.
Reviewed-by: dholmes, ysr

     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 "runtime/os.hpp"

    28 #include "utilities/decoder.hpp"

    30 HMODULE                   Decoder::_dbghelp_handle = NULL;

    31 bool                      Decoder::_can_decode_in_vm = false;

    32 pfn_SymGetSymFromAddr64   Decoder::_pfnSymGetSymFromAddr64 = NULL;

    33 pfn_UndecorateSymbolName  Decoder::_pfnUndecorateSymbolName = NULL;

    35 void Decoder::initialize() {

    36   if (!_initialized) {

    37     _initialized = true;

    39     HINSTANCE handle = os::win32::load_Windows_dll("dbghelp.dll", NULL, 0);

    40     if (!handle) {

    41       _decoder_status = helper_not_found;

    42         return;

    43     }

    45     _dbghelp_handle = handle;

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

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

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

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

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

    53       _pfnSymGetSymFromAddr64 = NULL;

    54       _pfnUndecorateSymbolName = NULL;

    55       ::FreeLibrary(handle);

    56       _dbghelp_handle = NULL;

    57       _decoder_status = helper_func_error;

    58       return;

    59     }

    61     _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);

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

    63       _pfnSymGetSymFromAddr64 = NULL;

    64       _pfnUndecorateSymbolName = NULL;

    65       ::FreeLibrary(handle);

    66       _dbghelp_handle = NULL;

    67       _decoder_status = helper_init_error;

    68       return;

    69     }

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

    72      // current function and comparing the result

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

    74      char buf[MAX_PATH];

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

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

    77      }

    78   }

    79 }

    81 void Decoder::uninitialize() {

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

    83   _pfnSymGetSymFromAddr64 = NULL;

    84   _pfnUndecorateSymbolName = NULL;

    85   if (_dbghelp_handle != NULL) {

    86     ::FreeLibrary(_dbghelp_handle);

    87   }

    88   _initialized = false;

    89 }

    91 bool Decoder::can_decode_C_frame_in_vm() {

    92   initialize();

    93   return  _can_decode_in_vm;

    94 }

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

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

    99   if (_pfnSymGetSymFromAddr64 != NULL) {

   100     PIMAGEHLP_SYMBOL64 pSymbol;

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

   102     pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo;

   103     pSymbol->MaxNameLength = MAX_PATH;

   104     pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);

   105     DWORD64 displacement;

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

   107       if (buf != NULL) {

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

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

   110         }

   111       }

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

   113       return no_error;

   114     }

   115   }

   116   return helper_not_found;

   117 }

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

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

   121   return _pfnUndecorateSymbolName != NULL &&

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

   123 }

src/os/windows/vm/decoder_windows.cpp@e7dead7e90af

src/os/windows/vm/decoder_windows.cpp

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

src/os/windows/vm/decoder_windows.cpp@e7dead7e90af

src/os/windows/vm/decoder_windows.cpp