1 /* 2 * Copyright (c) 1997, 2015, 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 */ 24 25 #ifndef OS_WINDOWS_VM_OS_WINDOWS_HPP 26 #define OS_WINDOWS_VM_OS_WINDOWS_HPP 27 // Win32_OS defines the interface to windows operating systems 28 29 // Information about the protection of the page at address '0' on this os. 30 static bool zero_page_read_protected() { return true; } 31 32 // File conventions 33 static const char* file_separator() { return "\\"; } 34 static const char* line_separator() { return "\r\n"; } 35 static const char* path_separator() { return ";"; } 36 37 class win32 { 38 friend class os; 39 friend unsigned __stdcall java_start(class Thread*); 40 41 protected: 42 static int _vm_page_size; 43 static int _vm_allocation_granularity; 44 static int _processor_type; 45 static int _processor_level; 46 static julong _physical_memory; 47 static size_t _default_stack_size; 48 static bool _is_nt; 49 static bool _is_windows_2003; 50 static bool _is_windows_server; 51 static bool _has_exit_bug; 52 static bool _has_performance_count; 53 54 static void print_windows_version(outputStream* st); 55 56 public: 57 // Windows-specific interface: 58 static void initialize_system_info(); 59 static void setmode_streams(); 60 61 // Processor info as provided by NT 62 static int processor_type() { return _processor_type; } 63 // Processor level may not be accurate on non-NT systems 64 static int processor_level() { 65 assert(is_nt(), "use vm_version instead"); 66 return _processor_level; 67 } 68 static julong available_memory(); 69 static julong physical_memory() { return _physical_memory; } 70 71 // load dll from Windows system directory or Windows directory 72 static HINSTANCE load_Windows_dll(const char* name, char *ebuf, int ebuflen); 73 74 private: 75 enum Ept { EPT_THREAD, EPT_PROCESS, EPT_PROCESS_DIE }; 76 // Wrapper around _endthreadex(), exit() and _exit() 77 static int exit_process_or_thread(Ept what, int exit_code); 78 79 static void initialize_performance_counter(); 80 81 public: 82 // Generic interface: 83 84 // Trace number of created threads 85 static intx _os_thread_limit; 86 static volatile intx _os_thread_count; 87 88 // Tells whether the platform is NT or Windown95 89 static bool is_nt() { return _is_nt; } 90 91 // Tells whether this is a server version of Windows 92 static bool is_windows_server() { return _is_windows_server; } 93 94 // Tells whether the platform is Windows 2003 95 static bool is_windows_2003() { return _is_windows_2003; } 96 97 // Tells whether there can be the race bug during process exit on this platform 98 static bool has_exit_bug() { return _has_exit_bug; } 99 100 // Returns the byte size of a virtual memory page 101 static int vm_page_size() { return _vm_page_size; } 102 103 // Returns the size in bytes of memory blocks which can be allocated. 104 static int vm_allocation_granularity() { return _vm_allocation_granularity; } 105 106 // Read the headers for the executable that started the current process into 107 // the structure passed in (see winnt.h). 108 static void read_executable_headers(PIMAGE_NT_HEADERS); 109 110 // Default stack size for the current process. 111 static size_t default_stack_size() { return _default_stack_size; } 112 113 #ifndef _WIN64 114 // A wrapper to install a structured exception handler for fast JNI accesors. 115 static address fast_jni_accessor_wrapper(BasicType); 116 #endif 117 118 // filter function to ignore faults on serializations page 119 static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e); 120 }; 121 122 /* 123 * Crash protection for the watcher thread. Wrap the callback 124 * with a __try { call() } 125 * To be able to use this - don't take locks, don't rely on destructors, 126 * don't make OS library calls, don't allocate memory, don't print, 127 * don't call code that could leave the heap / memory in an inconsistent state, 128 * or anything else where we are not in control if we suddenly jump out. 129 */ 130 class WatcherThreadCrashProtection : public StackObj { 131 public: 132 WatcherThreadCrashProtection(); 133 bool call(os::CrashProtectionCallback& cb); 134 }; 135 136 class PlatformEvent : public CHeapObj<mtInternal> { 137 private: 138 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line 139 volatile int _Event ; 140 HANDLE _ParkHandle ; 141 142 public: // TODO-FIXME: make dtor private 143 ~PlatformEvent() { guarantee (0, "invariant") ; } 144 145 public: 146 PlatformEvent() { 147 _Event = 0 ; 148 _ParkHandle = CreateEvent (NULL, false, false, NULL) ; 149 guarantee (_ParkHandle != NULL, "invariant") ; 150 } 151 152 // Exercise caution using reset() and fired() - they may require MEMBARs 153 void reset() { _Event = 0 ; } 154 int fired() { return _Event; } 155 void park () ; 156 void unpark () ; 157 int park (jlong millis) ; 158 } ; 159 160 161 162 class PlatformParker : public CHeapObj<mtInternal> { 163 protected: 164 HANDLE _ParkEvent ; 165 166 public: 167 ~PlatformParker () { guarantee (0, "invariant") ; } 168 PlatformParker () { 169 _ParkEvent = CreateEvent (NULL, true, false, NULL) ; 170 guarantee (_ParkEvent != NULL, "invariant") ; 171 } 172 173 } ; 174 175 // JDK7 requires VS2010 176 #if _MSC_VER < 1600 177 #define JDK6_OR_EARLIER 1 178 #endif 179 180 181 182 class WinSock2Dll: AllStatic { 183 public: 184 static BOOL WSAStartup(WORD, LPWSADATA); 185 static struct hostent* gethostbyname(const char *name); 186 static BOOL WinSock2Available(); 187 #ifdef JDK6_OR_EARLIER 188 private: 189 static int (PASCAL FAR* _WSAStartup)(WORD, LPWSADATA); 190 static struct hostent *(PASCAL FAR *_gethostbyname)(...); 191 static BOOL initialized; 192 193 static void initialize(); 194 #endif 195 }; 196 197 class Kernel32Dll: AllStatic { 198 public: 199 static BOOL SwitchToThread(); 200 static SIZE_T GetLargePageMinimum(); 201 202 static BOOL SwitchToThreadAvailable(); 203 static BOOL GetLargePageMinimumAvailable(); 204 205 // Help tools 206 static BOOL HelpToolsAvailable(); 207 static HANDLE CreateToolhelp32Snapshot(DWORD,DWORD); 208 static BOOL Module32First(HANDLE,LPMODULEENTRY32); 209 static BOOL Module32Next(HANDLE,LPMODULEENTRY32); 210 211 static void GetNativeSystemInfo(LPSYSTEM_INFO); 212 213 // NUMA calls 214 static BOOL NumaCallsAvailable(); 215 static LPVOID VirtualAllocExNuma(HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 216 static BOOL GetNumaHighestNodeNumber(PULONG); 217 static BOOL GetNumaNodeProcessorMask(UCHAR, PULONGLONG); 218 219 // Stack walking 220 static USHORT RtlCaptureStackBackTrace(ULONG, ULONG, PVOID*, PULONG); 221 222 private: 223 // GetLargePageMinimum available on Windows Vista/Windows Server 2003 224 // and later 225 // NUMA calls available Windows Vista/WS2008 and later 226 227 static SIZE_T (WINAPI *_GetLargePageMinimum)(void); 228 static LPVOID (WINAPI *_VirtualAllocExNuma) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 229 static BOOL (WINAPI *_GetNumaHighestNodeNumber) (PULONG); 230 static BOOL (WINAPI *_GetNumaNodeProcessorMask) (UCHAR, PULONGLONG); 231 static USHORT (WINAPI *_RtlCaptureStackBackTrace)(ULONG, ULONG, PVOID*, PULONG); 232 static BOOL initialized; 233 234 static void initialize(); 235 static void initializeCommon(); 236 237 #ifdef JDK6_OR_EARLIER 238 private: 239 static BOOL (WINAPI *_SwitchToThread)(void); 240 static HANDLE (WINAPI* _CreateToolhelp32Snapshot)(DWORD,DWORD); 241 static BOOL (WINAPI* _Module32First)(HANDLE,LPMODULEENTRY32); 242 static BOOL (WINAPI* _Module32Next)(HANDLE,LPMODULEENTRY32); 243 static void (WINAPI *_GetNativeSystemInfo)(LPSYSTEM_INFO); 244 #endif 245 246 }; 247 248 class Advapi32Dll: AllStatic { 249 public: 250 static BOOL AdjustTokenPrivileges(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 251 static BOOL OpenProcessToken(HANDLE, DWORD, PHANDLE); 252 static BOOL LookupPrivilegeValue(LPCTSTR, LPCTSTR, PLUID); 253 254 static BOOL AdvapiAvailable(); 255 256 #ifdef JDK6_OR_EARLIER 257 private: 258 static BOOL (WINAPI *_AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 259 static BOOL (WINAPI *_OpenProcessToken)(HANDLE, DWORD, PHANDLE); 260 static BOOL (WINAPI *_LookupPrivilegeValue)(LPCTSTR, LPCTSTR, PLUID); 261 static BOOL initialized; 262 263 static void initialize(); 264 #endif 265 }; 266 267 class PSApiDll: AllStatic { 268 public: 269 static BOOL EnumProcessModules(HANDLE, HMODULE *, DWORD, LPDWORD); 270 static DWORD GetModuleFileNameEx(HANDLE, HMODULE, LPTSTR, DWORD); 271 static BOOL GetModuleInformation(HANDLE, HMODULE, LPMODULEINFO, DWORD); 272 273 static BOOL PSApiAvailable(); 274 275 #ifdef JDK6_OR_EARLIER 276 private: 277 static BOOL (WINAPI *_EnumProcessModules)(HANDLE, HMODULE *, DWORD, LPDWORD); 278 static BOOL (WINAPI *_GetModuleFileNameEx)(HANDLE, HMODULE, LPTSTR, DWORD);; 279 static BOOL (WINAPI *_GetModuleInformation)(HANDLE, HMODULE, LPMODULEINFO, DWORD); 280 static BOOL initialized; 281 282 static void initialize(); 283 #endif 284 }; 285 286 #endif // OS_WINDOWS_VM_OS_WINDOWS_HPP