Mon, 19 Dec 2011 10:02:05 -0800
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
zgu@2364 | 1 | /* |
zgu@2364 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
zgu@2364 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
zgu@2364 | 4 | * |
zgu@2364 | 5 | * This code is free software; you can redistribute it and/or modify it |
zgu@2364 | 6 | * under the terms of the GNU General Public License version 2 only, as |
zgu@2364 | 7 | * published by the Free Software Foundation. |
zgu@2364 | 8 | * |
zgu@2364 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
zgu@2364 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
zgu@2364 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
zgu@2364 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
zgu@2364 | 13 | * accompanied this code). |
zgu@2364 | 14 | * |
zgu@2364 | 15 | * You should have received a copy of the GNU General Public License version |
zgu@2364 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
zgu@2364 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
zgu@2364 | 18 | * |
zgu@2364 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
zgu@2364 | 20 | * or visit www.oracle.com if you need additional information or have any |
zgu@2364 | 21 | * questions. |
zgu@2364 | 22 | * |
zgu@2364 | 23 | */ |
zgu@2364 | 24 | |
zgu@2364 | 25 | #include "precompiled.hpp" |
zgu@2364 | 26 | #include "prims/jvm.h" |
zgu@3031 | 27 | #include "runtime/os.hpp" |
zgu@2364 | 28 | #include "utilities/decoder.hpp" |
zgu@2364 | 29 | |
zgu@2364 | 30 | HMODULE Decoder::_dbghelp_handle = NULL; |
zgu@2364 | 31 | bool Decoder::_can_decode_in_vm = false; |
zgu@2364 | 32 | pfn_SymGetSymFromAddr64 Decoder::_pfnSymGetSymFromAddr64 = NULL; |
zgu@2364 | 33 | pfn_UndecorateSymbolName Decoder::_pfnUndecorateSymbolName = NULL; |
zgu@2364 | 34 | |
zgu@2364 | 35 | void Decoder::initialize() { |
zgu@2364 | 36 | if (!_initialized) { |
zgu@2364 | 37 | _initialized = true; |
zgu@2364 | 38 | |
zgu@3031 | 39 | HINSTANCE handle = os::win32::load_Windows_dll("dbghelp.dll", NULL, 0); |
zgu@2364 | 40 | if (!handle) { |
zgu@2364 | 41 | _decoder_status = helper_not_found; |
zgu@2364 | 42 | return; |
zgu@2364 | 43 | } |
zgu@2364 | 44 | |
zgu@2364 | 45 | _dbghelp_handle = handle; |
zgu@2364 | 46 | |
zgu@2364 | 47 | pfn_SymSetOptions _pfnSymSetOptions = (pfn_SymSetOptions)::GetProcAddress(handle, "SymSetOptions"); |
zgu@2364 | 48 | pfn_SymInitialize _pfnSymInitialize = (pfn_SymInitialize)::GetProcAddress(handle, "SymInitialize"); |
zgu@2364 | 49 | _pfnSymGetSymFromAddr64 = (pfn_SymGetSymFromAddr64)::GetProcAddress(handle, "SymGetSymFromAddr64"); |
zgu@2364 | 50 | _pfnUndecorateSymbolName = (pfn_UndecorateSymbolName)GetProcAddress(handle, "UnDecorateSymbolName"); |
zgu@2364 | 51 | |
zgu@2364 | 52 | if (_pfnSymSetOptions == NULL || _pfnSymInitialize == NULL || _pfnSymGetSymFromAddr64 == NULL) { |
zgu@2364 | 53 | _pfnSymGetSymFromAddr64 = NULL; |
zgu@2364 | 54 | _pfnUndecorateSymbolName = NULL; |
zgu@2364 | 55 | ::FreeLibrary(handle); |
zgu@2364 | 56 | _dbghelp_handle = NULL; |
zgu@2364 | 57 | _decoder_status = helper_func_error; |
zgu@2364 | 58 | return; |
zgu@2364 | 59 | } |
zgu@2364 | 60 | |
zgu@2364 | 61 | _pfnSymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS); |
zgu@2364 | 62 | if (!_pfnSymInitialize(GetCurrentProcess(), NULL, TRUE)) { |
zgu@2364 | 63 | _pfnSymGetSymFromAddr64 = NULL; |
zgu@2364 | 64 | _pfnUndecorateSymbolName = NULL; |
zgu@2364 | 65 | ::FreeLibrary(handle); |
zgu@2364 | 66 | _dbghelp_handle = NULL; |
zgu@2364 | 67 | _decoder_status = helper_init_error; |
zgu@2364 | 68 | return; |
zgu@2364 | 69 | } |
zgu@2364 | 70 | |
zgu@2364 | 71 | // find out if jvm.dll contains private symbols, by decoding |
zgu@2364 | 72 | // current function and comparing the result |
zgu@2364 | 73 | address addr = (address)Decoder::initialize; |
zgu@2364 | 74 | char buf[MAX_PATH]; |
zgu@2364 | 75 | if (decode(addr, buf, sizeof(buf), NULL) == no_error) { |
zgu@2364 | 76 | _can_decode_in_vm = !strcmp(buf, "Decoder::initialize"); |
zgu@2364 | 77 | } |
zgu@2364 | 78 | } |
zgu@2364 | 79 | } |
zgu@2364 | 80 | |
zgu@2364 | 81 | void Decoder::uninitialize() { |
zgu@2364 | 82 | assert(_initialized, "Decoder not yet initialized"); |
zgu@2364 | 83 | _pfnSymGetSymFromAddr64 = NULL; |
zgu@2364 | 84 | _pfnUndecorateSymbolName = NULL; |
zgu@2364 | 85 | if (_dbghelp_handle != NULL) { |
zgu@2364 | 86 | ::FreeLibrary(_dbghelp_handle); |
zgu@2364 | 87 | } |
zgu@2364 | 88 | _initialized = false; |
zgu@2364 | 89 | } |
zgu@2364 | 90 | |
zgu@2364 | 91 | bool Decoder::can_decode_C_frame_in_vm() { |
zgu@2364 | 92 | initialize(); |
zgu@2364 | 93 | return _can_decode_in_vm; |
zgu@2364 | 94 | } |
zgu@2364 | 95 | |
zgu@2364 | 96 | |
zgu@2364 | 97 | Decoder::decoder_status Decoder::decode(address addr, char *buf, int buflen, int *offset) { |
zgu@2364 | 98 | assert(_initialized, "Decoder not yet initialized"); |
zgu@2364 | 99 | if (_pfnSymGetSymFromAddr64 != NULL) { |
zgu@2364 | 100 | PIMAGEHLP_SYMBOL64 pSymbol; |
zgu@2364 | 101 | char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)]; |
zgu@2364 | 102 | pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo; |
zgu@2364 | 103 | pSymbol->MaxNameLength = MAX_PATH; |
zgu@2364 | 104 | pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64); |
zgu@2364 | 105 | DWORD64 displacement; |
zgu@2364 | 106 | if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) { |
zgu@2364 | 107 | if (buf != NULL) { |
zgu@2364 | 108 | if (!demangle(pSymbol->Name, buf, buflen)) { |
zgu@2364 | 109 | jio_snprintf(buf, buflen, "%s", pSymbol->Name); |
zgu@2364 | 110 | } |
zgu@2364 | 111 | } |
zgu@2364 | 112 | if (offset != NULL) *offset = (int)displacement; |
zgu@2364 | 113 | return no_error; |
zgu@2364 | 114 | } |
zgu@2364 | 115 | } |
zgu@2364 | 116 | return helper_not_found; |
zgu@2364 | 117 | } |
zgu@2364 | 118 | |
zgu@2364 | 119 | bool Decoder::demangle(const char* symbol, char *buf, int buflen) { |
zgu@2364 | 120 | assert(_initialized, "Decoder not yet initialized"); |
zgu@2364 | 121 | return _pfnUndecorateSymbolName != NULL && |
zgu@2364 | 122 | _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE); |
zgu@2364 | 123 | } |
zgu@2364 | 124 |