Mercurial > hg > truffle
annotate src/os/windows/vm/os_windows.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
author | tschatzl |
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date | Fri, 10 Oct 2014 15:51:58 +0200 |
parents | 0118c8c7b80f |
children | 52b4284cb496 09259e52a610 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef OS_WINDOWS_VM_OS_WINDOWS_HPP |
26 #define OS_WINDOWS_VM_OS_WINDOWS_HPP | |
0 | 27 // Win32_OS defines the interface to windows operating systems |
28 | |
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29 // Information about the protection of the page at address '0' on this os. |
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30 static bool zero_page_read_protected() { return true; } |
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31 |
0 | 32 class win32 { |
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33 friend class os; |
0 | 34 |
35 protected: | |
36 static int _vm_page_size; | |
37 static int _vm_allocation_granularity; | |
38 static int _processor_type; | |
39 static int _processor_level; | |
40 static julong _physical_memory; | |
41 static size_t _default_stack_size; | |
42 static bool _is_nt; | |
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43 static bool _is_windows_2003; |
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44 static bool _is_windows_server; |
0 | 45 |
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46 static void print_windows_version(outputStream* st); |
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47 |
0 | 48 public: |
49 // Windows-specific interface: | |
50 static void initialize_system_info(); | |
51 static void setmode_streams(); | |
52 | |
53 // Processor info as provided by NT | |
54 static int processor_type() { return _processor_type; } | |
55 // Processor level may not be accurate on non-NT systems | |
56 static int processor_level() { | |
57 assert(is_nt(), "use vm_version instead"); | |
58 return _processor_level; | |
59 } | |
60 static julong available_memory(); | |
61 static julong physical_memory() { return _physical_memory; } | |
62 | |
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63 // load dll from Windows system directory or Windows directory |
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64 static HINSTANCE load_Windows_dll(const char* name, char *ebuf, int ebuflen); |
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65 |
0 | 66 public: |
67 // Generic interface: | |
68 | |
69 // Trace number of created threads | |
70 static intx _os_thread_limit; | |
71 static volatile intx _os_thread_count; | |
72 | |
73 // Tells whether the platform is NT or Windown95 | |
74 static bool is_nt() { return _is_nt; } | |
75 | |
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76 // Tells whether this is a server version of Windows |
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77 static bool is_windows_server() { return _is_windows_server; } |
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78 |
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79 // Tells whether the platform is Windows 2003 |
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80 static bool is_windows_2003() { return _is_windows_2003; } |
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81 |
0 | 82 // Returns the byte size of a virtual memory page |
83 static int vm_page_size() { return _vm_page_size; } | |
84 | |
85 // Returns the size in bytes of memory blocks which can be allocated. | |
86 static int vm_allocation_granularity() { return _vm_allocation_granularity; } | |
87 | |
88 // Read the headers for the executable that started the current process into | |
89 // the structure passed in (see winnt.h). | |
90 static void read_executable_headers(PIMAGE_NT_HEADERS); | |
91 | |
92 // Default stack size for the current process. | |
93 static size_t default_stack_size() { return _default_stack_size; } | |
94 | |
95 #ifndef _WIN64 | |
96 // A wrapper to install a structured exception handler for fast JNI accesors. | |
97 static address fast_jni_accessor_wrapper(BasicType); | |
98 #endif | |
99 | |
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100 static void call_test_func_with_wrapper(void (*funcPtr)(void)); |
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101 |
0 | 102 // filter function to ignore faults on serializations page |
103 static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e); | |
104 }; | |
105 | |
11151 | 106 /* |
107 * Crash protection for the watcher thread. Wrap the callback | |
108 * with a __try { call() } | |
109 * To be able to use this - don't take locks, don't rely on destructors, | |
110 * don't make OS library calls, don't allocate memory, don't print, | |
111 * don't call code that could leave the heap / memory in an inconsistent state, | |
112 * or anything else where we are not in control if we suddenly jump out. | |
113 */ | |
114 class WatcherThreadCrashProtection : public StackObj { | |
115 public: | |
116 WatcherThreadCrashProtection(); | |
117 bool call(os::CrashProtectionCallback& cb); | |
118 }; | |
119 | |
6197 | 120 class PlatformEvent : public CHeapObj<mtInternal> { |
0 | 121 private: |
122 double CachePad [4] ; // increase odds that _Event is sole occupant of cache line | |
123 volatile int _Event ; | |
124 HANDLE _ParkHandle ; | |
125 | |
126 public: // TODO-FIXME: make dtor private | |
127 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
128 | |
129 public: | |
130 PlatformEvent() { | |
131 _Event = 0 ; | |
132 _ParkHandle = CreateEvent (NULL, false, false, NULL) ; | |
133 guarantee (_ParkHandle != NULL, "invariant") ; | |
134 } | |
135 | |
136 // Exercise caution using reset() and fired() - they may require MEMBARs | |
137 void reset() { _Event = 0 ; } | |
138 int fired() { return _Event; } | |
139 void park () ; | |
140 void unpark () ; | |
141 int park (jlong millis) ; | |
142 } ; | |
143 | |
144 | |
145 | |
6197 | 146 class PlatformParker : public CHeapObj<mtInternal> { |
0 | 147 protected: |
148 HANDLE _ParkEvent ; | |
149 | |
150 public: | |
151 ~PlatformParker () { guarantee (0, "invariant") ; } | |
152 PlatformParker () { | |
153 _ParkEvent = CreateEvent (NULL, true, false, NULL) ; | |
154 guarantee (_ParkEvent != NULL, "invariant") ; | |
155 } | |
156 | |
157 } ; | |
1972 | 158 |
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159 // JDK7 requires VS2010 |
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160 #if _MSC_VER < 1600 |
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161 #define JDK6_OR_EARLIER 1 |
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162 #endif |
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163 |
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164 |
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165 |
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166 class WinSock2Dll: AllStatic { |
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167 public: |
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168 static BOOL WSAStartup(WORD, LPWSADATA); |
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169 static struct hostent* gethostbyname(const char *name); |
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170 static BOOL WinSock2Available(); |
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171 #ifdef JDK6_OR_EARLIER |
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172 private: |
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173 static int (PASCAL FAR* _WSAStartup)(WORD, LPWSADATA); |
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174 static struct hostent *(PASCAL FAR *_gethostbyname)(...); |
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175 static BOOL initialized; |
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176 |
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177 static void initialize(); |
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178 #endif |
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179 }; |
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180 |
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181 class Kernel32Dll: AllStatic { |
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182 public: |
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183 static BOOL SwitchToThread(); |
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184 static SIZE_T GetLargePageMinimum(); |
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185 |
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186 static BOOL SwitchToThreadAvailable(); |
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187 static BOOL GetLargePageMinimumAvailable(); |
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188 |
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189 // Help tools |
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190 static BOOL HelpToolsAvailable(); |
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191 static HANDLE CreateToolhelp32Snapshot(DWORD,DWORD); |
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192 static BOOL Module32First(HANDLE,LPMODULEENTRY32); |
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193 static BOOL Module32Next(HANDLE,LPMODULEENTRY32); |
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194 |
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195 static BOOL GetNativeSystemInfoAvailable(); |
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196 static void GetNativeSystemInfo(LPSYSTEM_INFO); |
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197 |
3885 | 198 // NUMA calls |
199 static BOOL NumaCallsAvailable(); | |
200 static LPVOID VirtualAllocExNuma(HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); | |
201 static BOOL GetNumaHighestNodeNumber(PULONG); | |
202 static BOOL GetNumaNodeProcessorMask(UCHAR, PULONGLONG); | |
203 | |
6197 | 204 // Stack walking |
205 static USHORT RtlCaptureStackBackTrace(ULONG, ULONG, PVOID*, PULONG); | |
206 | |
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207 private: |
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208 // GetLargePageMinimum available on Windows Vista/Windows Server 2003 |
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209 // and later |
3885 | 210 // NUMA calls available Windows Vista/WS2008 and later |
211 | |
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212 static SIZE_T (WINAPI *_GetLargePageMinimum)(void); |
3885 | 213 static LPVOID (WINAPI *_VirtualAllocExNuma) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); |
214 static BOOL (WINAPI *_GetNumaHighestNodeNumber) (PULONG); | |
215 static BOOL (WINAPI *_GetNumaNodeProcessorMask) (UCHAR, PULONGLONG); | |
6197 | 216 static USHORT (WINAPI *_RtlCaptureStackBackTrace)(ULONG, ULONG, PVOID*, PULONG); |
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217 static BOOL initialized; |
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218 |
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219 static void initialize(); |
3885 | 220 static void initializeCommon(); |
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221 |
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222 #ifdef JDK6_OR_EARLIER |
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223 private: |
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224 static BOOL (WINAPI *_SwitchToThread)(void); |
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225 static HANDLE (WINAPI* _CreateToolhelp32Snapshot)(DWORD,DWORD); |
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226 static BOOL (WINAPI* _Module32First)(HANDLE,LPMODULEENTRY32); |
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227 static BOOL (WINAPI* _Module32Next)(HANDLE,LPMODULEENTRY32); |
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228 static void (WINAPI *_GetNativeSystemInfo)(LPSYSTEM_INFO); |
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229 #endif |
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230 |
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231 }; |
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232 |
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233 class Advapi32Dll: AllStatic { |
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234 public: |
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235 static BOOL AdjustTokenPrivileges(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); |
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236 static BOOL OpenProcessToken(HANDLE, DWORD, PHANDLE); |
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237 static BOOL LookupPrivilegeValue(LPCTSTR, LPCTSTR, PLUID); |
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238 |
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239 static BOOL AdvapiAvailable(); |
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240 |
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241 #ifdef JDK6_OR_EARLIER |
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242 private: |
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243 static BOOL (WINAPI *_AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); |
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244 static BOOL (WINAPI *_OpenProcessToken)(HANDLE, DWORD, PHANDLE); |
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245 static BOOL (WINAPI *_LookupPrivilegeValue)(LPCTSTR, LPCTSTR, PLUID); |
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246 static BOOL initialized; |
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247 |
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248 static void initialize(); |
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249 #endif |
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250 }; |
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251 |
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252 class PSApiDll: AllStatic { |
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253 public: |
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254 static BOOL EnumProcessModules(HANDLE, HMODULE *, DWORD, LPDWORD); |
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255 static DWORD GetModuleFileNameEx(HANDLE, HMODULE, LPTSTR, DWORD); |
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256 static BOOL GetModuleInformation(HANDLE, HMODULE, LPMODULEINFO, DWORD); |
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257 |
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258 static BOOL PSApiAvailable(); |
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259 |
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260 #ifdef JDK6_OR_EARLIER |
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261 private: |
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262 static BOOL (WINAPI *_EnumProcessModules)(HANDLE, HMODULE *, DWORD, LPDWORD); |
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263 static BOOL (WINAPI *_GetModuleFileNameEx)(HANDLE, HMODULE, LPTSTR, DWORD);; |
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264 static BOOL (WINAPI *_GetModuleInformation)(HANDLE, HMODULE, LPMODULEINFO, DWORD); |
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265 static BOOL initialized; |
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266 |
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267 static void initialize(); |
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268 #endif |
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269 }; |
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270 |
1972 | 271 #endif // OS_WINDOWS_VM_OS_WINDOWS_HPP |