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 // Fast access to current thread 122 protected: 123 static int _thread_ptr_offset; 124 private: 125 static void initialize_thread_ptr_offset(); 126 public: 127 static inline void set_thread_ptr_offset( int offset ) { 128 _thread_ptr_offset = offset; 129 } 130 static inline int get_thread_ptr_offset() { return _thread_ptr_offset; } 131 }; 132 133 /* 134 * Crash protection for the watcher thread. Wrap the callback 135 * with a __try { call() } 136 * To be able to use this - don't take locks, don't rely on destructors, 137 * don't make OS library calls, don't allocate memory, don't print, 138 * don't call code that could leave the heap / memory in an inconsistent state, 139 * or anything else where we are not in control if we suddenly jump out. 140 */ 141 class WatcherThreadCrashProtection : public StackObj { 142 public: 143 WatcherThreadCrashProtection(); 144 bool call(os::CrashProtectionCallback& cb); 145 }; 146 147 class PlatformEvent : public CHeapObj<mtInternal> { 148 private: 149 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line 150 volatile int _Event ; 151 HANDLE _ParkHandle ; 152 153 public: // TODO-FIXME: make dtor private 154 ~PlatformEvent() { guarantee (0, "invariant") ; } 155 156 public: 157 PlatformEvent() { 158 _Event = 0 ; 159 _ParkHandle = CreateEvent (NULL, false, false, NULL) ; 160 guarantee (_ParkHandle != NULL, "invariant") ; 161 } 162 163 // Exercise caution using reset() and fired() - they may require MEMBARs 164 void reset() { _Event = 0 ; } 165 int fired() { return _Event; } 166 void park () ; 167 void unpark () ; 168 int park (jlong millis) ; 169 } ; 170 171 172 173 class PlatformParker : public CHeapObj<mtInternal> { 174 protected: 175 HANDLE _ParkEvent ; 176 177 public: 178 ~PlatformParker () { guarantee (0, "invariant") ; } 179 PlatformParker () { 180 _ParkEvent = CreateEvent (NULL, true, false, NULL) ; 181 guarantee (_ParkEvent != NULL, "invariant") ; 182 } 183 184 } ; 185 186 // JDK7 requires VS2010 187 #if _MSC_VER < 1600 188 #define JDK6_OR_EARLIER 1 189 #endif 190 191 192 193 class WinSock2Dll: AllStatic { 194 public: 195 static BOOL WSAStartup(WORD, LPWSADATA); 196 static struct hostent* gethostbyname(const char *name); 197 static BOOL WinSock2Available(); 198 #ifdef JDK6_OR_EARLIER 199 private: 200 static int (PASCAL FAR* _WSAStartup)(WORD, LPWSADATA); 201 static struct hostent *(PASCAL FAR *_gethostbyname)(...); 202 static BOOL initialized; 203 204 static void initialize(); 205 #endif 206 }; 207 208 class Kernel32Dll: AllStatic { 209 public: 210 static BOOL SwitchToThread(); 211 static SIZE_T GetLargePageMinimum(); 212 213 static BOOL SwitchToThreadAvailable(); 214 static BOOL GetLargePageMinimumAvailable(); 215 216 // Help tools 217 static BOOL HelpToolsAvailable(); 218 static HANDLE CreateToolhelp32Snapshot(DWORD,DWORD); 219 static BOOL Module32First(HANDLE,LPMODULEENTRY32); 220 static BOOL Module32Next(HANDLE,LPMODULEENTRY32); 221 222 static void GetNativeSystemInfo(LPSYSTEM_INFO); 223 224 // NUMA calls 225 static BOOL NumaCallsAvailable(); 226 static LPVOID VirtualAllocExNuma(HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 227 static BOOL GetNumaHighestNodeNumber(PULONG); 228 static BOOL GetNumaNodeProcessorMask(UCHAR, PULONGLONG); 229 230 // Stack walking 231 static USHORT RtlCaptureStackBackTrace(ULONG, ULONG, PVOID*, PULONG); 232 233 private: 234 // GetLargePageMinimum available on Windows Vista/Windows Server 2003 235 // and later 236 // NUMA calls available Windows Vista/WS2008 and later 237 238 static SIZE_T (WINAPI *_GetLargePageMinimum)(void); 239 static LPVOID (WINAPI *_VirtualAllocExNuma) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 240 static BOOL (WINAPI *_GetNumaHighestNodeNumber) (PULONG); 241 static BOOL (WINAPI *_GetNumaNodeProcessorMask) (UCHAR, PULONGLONG); 242 static USHORT (WINAPI *_RtlCaptureStackBackTrace)(ULONG, ULONG, PVOID*, PULONG); 243 static BOOL initialized; 244 245 static void initialize(); 246 static void initializeCommon(); 247 248 #ifdef JDK6_OR_EARLIER 249 private: 250 static BOOL (WINAPI *_SwitchToThread)(void); 251 static HANDLE (WINAPI* _CreateToolhelp32Snapshot)(DWORD,DWORD); 252 static BOOL (WINAPI* _Module32First)(HANDLE,LPMODULEENTRY32); 253 static BOOL (WINAPI* _Module32Next)(HANDLE,LPMODULEENTRY32); 254 static void (WINAPI *_GetNativeSystemInfo)(LPSYSTEM_INFO); 255 #endif 256 257 }; 258 259 class Advapi32Dll: AllStatic { 260 public: 261 static BOOL AdjustTokenPrivileges(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 262 static BOOL OpenProcessToken(HANDLE, DWORD, PHANDLE); 263 static BOOL LookupPrivilegeValue(LPCTSTR, LPCTSTR, PLUID); 264 265 static BOOL AdvapiAvailable(); 266 267 #ifdef JDK6_OR_EARLIER 268 private: 269 static BOOL (WINAPI *_AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 270 static BOOL (WINAPI *_OpenProcessToken)(HANDLE, DWORD, PHANDLE); 271 static BOOL (WINAPI *_LookupPrivilegeValue)(LPCTSTR, LPCTSTR, PLUID); 272 static BOOL initialized; 273 274 static void initialize(); 275 #endif 276 }; 277 278 class PSApiDll: AllStatic { 279 public: 280 static BOOL EnumProcessModules(HANDLE, HMODULE *, DWORD, LPDWORD); 281 static DWORD GetModuleFileNameEx(HANDLE, HMODULE, LPTSTR, DWORD); 282 static BOOL GetModuleInformation(HANDLE, HMODULE, LPMODULEINFO, DWORD); 283 284 static BOOL PSApiAvailable(); 285 286 #ifdef JDK6_OR_EARLIER 287 private: 288 static BOOL (WINAPI *_EnumProcessModules)(HANDLE, HMODULE *, DWORD, LPDWORD); 289 static BOOL (WINAPI *_GetModuleFileNameEx)(HANDLE, HMODULE, LPTSTR, DWORD);; 290 static BOOL (WINAPI *_GetModuleInformation)(HANDLE, HMODULE, LPMODULEINFO, DWORD); 291 static BOOL initialized; 292 293 static void initialize(); 294 #endif 295 }; 296 297 #endif // OS_WINDOWS_VM_OS_WINDOWS_HPP