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