Commit | Line | Data |
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61ec970d PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
5 | /* Cygwin-specific code. December 2002 | |
6 | This is concatenated onto the generic src/os.c file. | |
7 | ||
8 | This code was supplied by Pierre A. Humblet <Pierre.Humblet@ieee.org> | |
9 | */ | |
10 | ||
11 | /* We need a special mkdir that | |
12 | allows names starting with // */ | |
13 | #undef mkdir | |
14 | int cygwin_mkdir( const char *path, mode_t mode ) | |
15 | { | |
16 | const char * p = path; | |
17 | if (*p == '/') while(*(p+1) == '/') p++; | |
18 | return mkdir(p, mode); | |
19 | } | |
20 | ||
21 | /* We have strsignal but cannot use #define | |
22 | because types don't match */ | |
23 | #define OS_STRSIGNAL /* src/os.c need not provide it */ | |
24 | char * os_strsignal(int sig) | |
25 | { | |
26 | return (char *) strsignal(sig); | |
27 | } | |
28 | ||
29 | #ifndef COMPILE_UTILITY /* Utilities don't need special code */ | |
30 | #ifdef INCLUDE_MINIRES | |
31 | #include "../minires/minires.c" | |
32 | #include "../minires/os-interface.c" | |
33 | #endif | |
34 | ||
35 | #ifdef INCLUDE_PAM | |
36 | #include "../pam/pam.c" | |
37 | #endif | |
38 | ||
39 | unsigned int cygwin_WinVersion; | |
40 | ||
41 | /* Conflict between Windows definitions and others */ | |
42 | #ifdef NOERROR | |
43 | #undef NOERROR | |
44 | #endif | |
45 | #ifdef DELETE | |
46 | #undef DELETE | |
47 | #endif | |
48 | ||
49 | #include <windows.h> | |
2c5db4fd PH |
50 | #define EqualLuid(Luid1, Luid2) \ |
51 | ((Luid1.LowPart == Luid2.LowPart) && (Luid1.HighPart == Luid2.HighPart)) | |
61ec970d PH |
52 | #include <sys/cygwin.h> |
53 | ||
54 | /* Special static variables */ | |
55 | static BOOL cygwin_debug = FALSE; | |
56 | static int privileged = 1; /* when not privileged, setuid = noop */ | |
57 | ||
58 | #undef setuid | |
59 | int cygwin_setuid(uid_t uid ) | |
60 | { | |
61 | int res; | |
62 | if (privileged <= 0) return 0; | |
63 | else { | |
64 | res = setuid(uid); | |
65 | if (cygwin_debug) | |
66 | fprintf(stderr, "setuid %lu %lu %d pid: %d\n", | |
67 | uid, getuid(),res, getpid()); | |
68 | } | |
69 | return res; | |
70 | } | |
71 | ||
72 | #undef setgid | |
73 | int cygwin_setgid(gid_t gid ) | |
74 | { | |
75 | int res; | |
76 | if (privileged <= 0) return 0; | |
77 | else { | |
78 | res = setgid(gid); | |
79 | if (cygwin_debug) | |
80 | fprintf(stderr, "setgid %lu %lu %d pid: %d\n", | |
8c841523 | 81 | gid, getgid(), res, getpid()); |
61ec970d PH |
82 | } |
83 | return res; | |
84 | } | |
85 | ||
86 | /* Background processes run at lower priority */ | |
b6c6011d | 87 | static void cygwin_setpriority() |
61ec970d PH |
88 | { |
89 | if (!SetPriorityClass(GetCurrentProcess(), BELOW_NORMAL_PRIORITY_CLASS)) | |
90 | SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS); | |
91 | return; | |
92 | } | |
93 | ||
94 | ||
95 | /* GetVersion() | |
96 | MSB: 1 for 95/98/ME; Next 7: build number, except for 95/98/ME | |
97 | Next byte: 0 | |
98 | Next byte: minor version of OS | |
99 | Low byte: major version of OS (3 or 4 for for NT, 5 for 2000 and XP) */ | |
100 | #define VERSION_IS_58M(x) (x & 0x80000000) /* 95, 98, Me */ | |
101 | #define VERSION_IS_NT(x) ((x & 0XFF) < 5) /* NT 4 or 3.51 */ | |
102 | ||
103 | /* | |
104 | Routine to find if process or thread is privileged | |
105 | */ | |
106 | ||
107 | enum { | |
108 | CREATE_BIT = 1, | |
109 | RESTORE_BIT = 2 | |
110 | }; | |
111 | ||
112 | static DWORD get_privileges () | |
113 | { | |
114 | char buffer[1024]; | |
115 | DWORD i, length; | |
116 | HANDLE hToken = NULL; | |
117 | PTOKEN_PRIVILEGES privs; | |
118 | LUID cluid, rluid; | |
119 | DWORD ret = 0; | |
120 | ||
121 | privs = (PTOKEN_PRIVILEGES) buffer; | |
122 | ||
123 | if (OpenProcessToken (GetCurrentProcess(), TOKEN_QUERY, &hToken) | |
124 | && LookupPrivilegeValue (NULL, SE_CREATE_TOKEN_NAME, &cluid) | |
125 | && LookupPrivilegeValue(NULL, SE_RESTORE_NAME, &rluid) | |
126 | && (GetTokenInformation( hToken, TokenPrivileges, | |
8c841523 PH |
127 | privs, sizeof (buffer), &length) |
128 | || (GetLastError () == ERROR_INSUFFICIENT_BUFFER | |
129 | && (privs = (PTOKEN_PRIVILEGES) alloca (length)) | |
130 | && GetTokenInformation(hToken, TokenPrivileges, | |
131 | privs, length, &length)))) { | |
61ec970d | 132 | for (i = 0; i < privs->PrivilegeCount; i++) { |
2c5db4fd | 133 | if (EqualLuid(privs->Privileges[i].Luid, cluid)) |
8c841523 | 134 | ret |= CREATE_BIT; |
2c5db4fd | 135 | else if (EqualLuid(privs->Privileges[i].Luid, rluid)) |
8c841523 | 136 | ret |= RESTORE_BIT; |
61ec970d PH |
137 | else continue; |
138 | if (ret == (CREATE_BIT | RESTORE_BIT)) | |
8c841523 | 139 | break; |
61ec970d PH |
140 | } |
141 | } | |
142 | else | |
143 | fprintf(stderr, "has_create_token_privilege %ld\n", GetLastError()); | |
144 | ||
145 | if (hToken) | |
146 | CloseHandle(hToken); | |
147 | ||
148 | return ret; | |
149 | } | |
150 | ||
151 | /* We use a special routine to initialize | |
152 | cygwin_init is called from the OS_INIT macro in main(). */ | |
153 | ||
154 | void cygwin_init(int argc, char ** argv, void * rup, | |
b6c6011d | 155 | void * eup, void * egp, void * cup, void * cgp) |
61ec970d PH |
156 | { |
157 | int i; | |
158 | uid_t myuid, systemuid; | |
159 | gid_t mygid, adminsgid; | |
160 | struct passwd * pwp; | |
161 | char *cygenv, win32_path[MAX_PATH]; | |
162 | SID(1, SystemSid, SECURITY_LOCAL_SYSTEM_RID); | |
163 | SID(2, AdminsSid, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS); | |
164 | DWORD priv_flags; | |
165 | ||
166 | myuid = getuid(); | |
167 | mygid = getgid(); | |
168 | cygwin_WinVersion = GetVersion(); | |
169 | if ((cygenv = getenv("CYGWIN")) == NULL) cygenv = ""; | |
170 | /* Produce some debugging on stderr, | |
171 | cannot yet use exim's debug functions. | |
172 | Exim does not use -c and ignores -n. | |
173 | Set lower priority for daemons */ | |
174 | for (i = 1; i < argc; i++) { | |
175 | if (argv[i][0] == '-') { | |
176 | if (argv[i][1] == 'c') { | |
177 | argv[i][1] = 'n'; /* Replace -c by -n */ | |
178 | cygwin_debug = TRUE; | |
179 | fprintf(stderr, "CYGWIN = \"%s\".", cygenv); | |
180 | cygwin_conv_to_win32_path("/", win32_path); | |
181 | fprintf(stderr, " Root / mapped to %s.\n", win32_path); | |
182 | } | |
183 | else if (argv[i][1] == 'b' && argv[i][2] == 'd') | |
b6c6011d | 184 | cygwin_setpriority(); |
61ec970d PH |
185 | } |
186 | } | |
187 | if (VERSION_IS_58M(cygwin_WinVersion)) { | |
188 | * (uid_t *) rup = myuid; /* Pretend we are root */ | |
189 | * (uid_t *) eup = myuid; /* ... and exim */ | |
190 | * (gid_t *) egp = mygid; | |
191 | return; | |
192 | } | |
193 | /* Nt/2000/XP | |
194 | We initially set the exim uid & gid to those of the "real exim", | |
195 | or to the root uid (SYSTEM) and exim gid (ADMINS), | |
196 | If privileged, we setuid to those. | |
197 | We always set the configure uid to the system uid. | |
198 | We always set the root uid to the real uid | |
199 | to avoid useless execs following forks. | |
200 | If not privileged and unable to chown, | |
201 | we set the exim uid to our uid. | |
202 | If unprivileged, we fake all subsequent setuid. */ | |
203 | ||
204 | priv_flags = get_privileges (); | |
205 | privileged = !!(priv_flags & CREATE_BIT); | |
206 | ||
207 | /* Get the system and admins uid from their sids, | |
208 | or use the default values from the Makefile. */ | |
209 | if ((systemuid = cygwin_internal(CW_GET_UID_FROM_SID, & SystemSid)) == -1) | |
210 | systemuid = * (uid_t *) eup; | |
211 | if ((adminsgid = cygwin_internal(CW_GET_GID_FROM_SID, & AdminsSid)) == -1) | |
212 | adminsgid = * (gid_t *) egp; | |
213 | ||
214 | if ((pwp = getpwnam("exim")) != NULL) { | |
215 | * (uid_t *) eup = pwp->pw_uid; /* Set it according to passwd */ | |
216 | * (gid_t *) egp = pwp->pw_gid; | |
217 | } | |
218 | else { | |
219 | * (uid_t *) eup = systemuid; | |
220 | * (gid_t *) egp = adminsgid; | |
221 | } | |
222 | ||
b6c6011d | 223 | /* Set the configuration uid and gid to the system uid and admins gid. |
61ec970d PH |
224 | Note that exim uid is also accepted as owner of exim.conf. */ |
225 | * (uid_t *) cup = systemuid; | |
b6c6011d | 226 | * (gid_t *) cgp = adminsgid; |
61ec970d PH |
227 | |
228 | if (privileged) { /* Can setuid */ | |
229 | if (cygwin_setgid(* (gid_t *) egp) /* Setuid to exim */ | |
230 | || cygwin_setuid(* (uid_t *) eup)) | |
8c841523 | 231 | privileged = -1; /* Problem... Perhaps not in 544 */ |
61ec970d PH |
232 | } |
233 | ||
234 | /* Pretend we are root to avoid useless execs. | |
235 | We are limited by file access rights */ | |
236 | * (uid_t *) rup = getuid (); | |
237 | ||
238 | /* If we have not setuid to exim and cannot chown, | |
239 | set the exim uid to our uid to avoid chown failures */ | |
240 | if (privileged <= 0 && !(priv_flags & RESTORE_BIT)) | |
241 | * (uid_t *) eup = * (uid_t *) rup; | |
242 | ||
243 | if (cygwin_debug) { | |
244 | fprintf(stderr, "Starting uid %ld, gid %ld, ntsec %lu, privileged %d.\n", | |
8c841523 | 245 | myuid, mygid, cygwin_internal(CW_CHECK_NTSEC, NULL), privileged); |
b6c6011d PH |
246 | fprintf(stderr, "root_uid %ld, exim_uid %ld, exim_gid %ld, config_uid %ld, config_gid %ld.\n", |
247 | * (uid_t *) rup, * (uid_t *) eup, * (gid_t *) egp, * (uid_t *) cup, * (gid_t *) cgp); | |
61ec970d PH |
248 | } |
249 | return; | |
250 | } | |
251 | ||
8c841523 PH |
252 | #ifndef OS_LOAD_AVERAGE /* Can be set on command line */ |
253 | #define OS_LOAD_AVERAGE /* src/os.c need not provide it */ | |
254 | ||
61ec970d PH |
255 | /***************************************************************** |
256 | * | |
257 | Functions for average load measurements | |
258 | ||
8c841523 PH |
259 | There are two methods, which work only on NT. |
260 | ||
261 | The first one uses the HKEY_PERFORMANCE_DATA registry to | |
262 | get performance data. It is complex but well documented | |
263 | and works on all NT versions. | |
264 | ||
265 | The second one uses NtQuerySystemInformation. | |
266 | Its use is discouraged starting with WinXP. | |
267 | ||
268 | Until 4.43, the Cygwin port of exim was using the first | |
269 | method. | |
270 | ||
271 | *****************************************************************/ | |
272 | #define PERF_METHOD2 | |
273 | ||
274 | /* Structure to compute the load average efficiently */ | |
275 | typedef struct { | |
276 | DWORD Lock; | |
277 | unsigned long long Time100ns; /* Last measurement time */ | |
278 | unsigned long long IdleCount; /* Latest cumulative idle time */ | |
279 | unsigned long long LastCounter; /* Last measurement counter */ | |
280 | unsigned long long PerfFreq; /* Perf counter frequency */ | |
281 | int LastLoad; /* Last reported load, or -1 */ | |
282 | #ifdef PERF_METHOD1 | |
283 | PPERF_DATA_BLOCK PerfData; /* Pointer to a buffer to get the data */ | |
284 | DWORD BufferSize; /* Size of PerfData */ | |
285 | LPSTR * NamesArray; /* Temporary (malloc) buffer for index */ | |
286 | #endif | |
287 | } cygwin_perf_t; | |
288 | ||
289 | static struct { | |
290 | HANDLE handle; | |
291 | pid_t pid; | |
292 | cygwin_perf_t *perf; | |
293 | } cygwin_load = {NULL, 0, NULL}; | |
294 | ||
295 | #ifdef PERF_METHOD1 | |
296 | /************************************************************* | |
297 | METHOD 1 | |
298 | ||
61ec970d PH |
299 | Obtaining statistics in Windows is done at a low level by |
300 | calling registry functions, in particular the key | |
301 | HKEY_PERFORMANCE_DATA on NT and successors. | |
302 | Something equivalent exists on Win95, see Microsoft article | |
8c841523 | 303 | HOWTO: Access the Performance Registry Under Windows 95 (KB 174631) |
61ec970d PH |
304 | but it is not implemented here. |
305 | ||
306 | The list of objects to be polled is specified in the string | |
307 | passed to RegQueryValueEx in ReadStat() below. | |
308 | On NT, all objects are polled even if info about only one is | |
309 | required. This is fixed in Windows 2000. See articles | |
8c841523 | 310 | INFO: Perflib Calling Close Procedure in Windows 2000 (KB 270127) |
61ec970d | 311 | INFO: Performance Data Changes Between Windows NT 4.0 and Windows |
8c841523 | 312 | 2000 (KB 296523) |
61ec970d PH |
313 | |
314 | It is unclear to me how the counters are primarily identified. | |
315 | Whether it's by name strings or by the offset of their strings | |
316 | as mapped in X:\Winnt\system32\perfc009.dat [or equivalently as | |
317 | reported by the registry functions in GetNameStrings( ) below]. | |
318 | Microsoft documentation seems to say that both methods should | |
319 | work. | |
320 | ||
321 | In the interest of speed and language independence, the main | |
322 | code below relies on offsets. However if debug is enabled, the | |
323 | code verifies that the names of the corresponding strings are | |
324 | as expected. | |
325 | ||
326 | *****************************************************************/ | |
61ec970d PH |
327 | |
328 | /* Object and counter indices and names */ | |
329 | #define PROCESSOR_OBJECT_INDEX 238 | |
330 | #define PROCESSOR_OBJECT_STRING "238" | |
331 | #define PROCESSOR_OBJECT_NAME "Processor" | |
332 | #define PROCESSOR_TIME_COUNTER 6 | |
333 | #define PROCESSOR_TIME_NAME "% Processor Time" | |
334 | ||
61ec970d PH |
335 | #define BYTEINCREMENT 800 /* Block to add to PerfData */ |
336 | ||
337 | /***************************************************************** | |
338 | * | |
339 | Macros to navigate through the performance data. | |
340 | ||
341 | *****************************************************************/ | |
342 | #define FirstObject(PerfData)\ | |
343 | ((PPERF_OBJECT_TYPE)((PBYTE)PerfData + PerfData->HeaderLength)) | |
344 | #define NextObject(PerfObj)\ | |
345 | ((PPERF_OBJECT_TYPE)((PBYTE)PerfObj + PerfObj->TotalByteLength)) | |
346 | #define ObjectCounterBlock(PerfObj)\ | |
347 | ((PPERF_COUNTER_BLOCK)(PBYTE)PerfObj + PerfObj->DefinitionLength ) | |
348 | #define FirstInstance(PerfObj )\ | |
349 | ((PPERF_INSTANCE_DEFINITION)((PBYTE)PerfObj + PerfObj->DefinitionLength)) | |
350 | #define InstanceCounterBlock(PerfInst)\ | |
351 | ((PPERF_COUNTER_BLOCK) ((PBYTE)PerfInst + PerfInst->ByteLength )) | |
352 | #define NextInstance(PerfInst )\ | |
353 | ((PPERF_INSTANCE_DEFINITION)((PBYTE)InstanceCounterBlock(PerfInst) + \ | |
354 | InstanceCounterBlock(PerfInst)->ByteLength) ) | |
355 | #define FirstCounter(PerfObj)\ | |
356 | ((PPERF_COUNTER_DEFINITION) ((PBYTE)PerfObj + PerfObj->HeaderLength)) | |
357 | #define NextCounter(PerfCntr)\ | |
358 | ((PPERF_COUNTER_DEFINITION)((PBYTE)PerfCntr + PerfCntr->ByteLength)) | |
359 | ||
360 | /***************************************************************** | |
361 | * | |
362 | Load the counter and object names from the registry | |
8c841523 PH |
363 | to cygwin_load.perf->NameStrings |
364 | and index them in cygwin_load.perf->NamesArray | |
61ec970d PH |
365 | |
366 | NameStrings seems to be taken from the file | |
367 | X:\Winnt\system32\perfc009.dat | |
368 | ||
369 | This is used only for name verification during initialization, | |
370 | if DEBUG(D_load) is TRUE. | |
371 | ||
372 | *****************************************************************/ | |
373 | static BOOL GetNameStrings( ) | |
374 | { | |
375 | HKEY hKeyPerflib; // handle to registry key | |
376 | DWORD dwArraySize; // size for array | |
377 | DWORD dwNamesSize; // size for strings | |
378 | LPSTR lpCurrentString; // pointer for enumerating data strings | |
379 | DWORD dwCounter; // current counter index | |
380 | LONG res; | |
381 | ||
382 | /* Get the number of Counter items into dwArraySize. */ | |
383 | if ((res = RegOpenKeyEx( HKEY_LOCAL_MACHINE, | |
8c841523 PH |
384 | "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib", |
385 | 0, | |
386 | KEY_QUERY_VALUE, /* KEY_READ, */ | |
387 | &hKeyPerflib)) | |
61ec970d PH |
388 | != ERROR_SUCCESS) { |
389 | DEBUG(D_load) debug_printf("RegOpenKeyEx (1): error %ld (Windows)\n", res); | |
390 | return FALSE; | |
391 | } | |
392 | dwNamesSize = sizeof(dwArraySize); /* Temporary reuse */ | |
393 | if ((res = RegQueryValueEx( hKeyPerflib, | |
8c841523 PH |
394 | "Last Counter", |
395 | NULL, | |
396 | NULL, | |
397 | (LPBYTE) &dwArraySize, | |
398 | &dwNamesSize )) | |
61ec970d PH |
399 | != ERROR_SUCCESS) { |
400 | DEBUG(D_load) debug_printf("RegQueryValueEx (1): error %ld (Windows)\n", res); | |
401 | return FALSE; | |
402 | } | |
403 | RegCloseKey( hKeyPerflib ); | |
404 | /* Open the key containing the counter and object names. */ | |
405 | if ((res = RegOpenKeyEx( HKEY_LOCAL_MACHINE, | |
8c841523 PH |
406 | "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib\\009", |
407 | 0, | |
408 | KEY_READ, | |
409 | &hKeyPerflib)) | |
61ec970d PH |
410 | != ERROR_SUCCESS) { |
411 | DEBUG(D_load) debug_printf("RegOpenKeyEx (2): error %ld (Windows)\n", res); | |
412 | return FALSE; | |
413 | } | |
414 | /* Get the size of the Counter value in the key | |
415 | and then read the value in the tail of NamesArray */ | |
416 | dwNamesSize = 0; | |
417 | lpCurrentString = NULL; | |
418 | while (1) { | |
419 | res = RegQueryValueEx( hKeyPerflib, | |
8c841523 PH |
420 | "Counter", |
421 | NULL, | |
422 | NULL, | |
423 | (unsigned char *) lpCurrentString, | |
424 | &dwNamesSize); | |
61ec970d | 425 | if ((res == ERROR_SUCCESS) && /* Bug (NT 4.0): SUCCESS was returned on first call */ |
8c841523 PH |
426 | (cygwin_load.perf->NamesArray != NULL)) break; |
427 | if ((res == ERROR_SUCCESS) || /* but cygwin_load.perf->NamesArrays == NULL */ | |
61ec970d PH |
428 | (res == ERROR_MORE_DATA)) { |
429 | /* Allocate memory BOTH for the names array and for the counter and object names */ | |
8c841523 PH |
430 | if ((cygwin_load.perf->NamesArray = |
431 | (LPSTR *) malloc( (dwArraySize + 1) * sizeof(LPSTR) + dwNamesSize * sizeof(CHAR))) | |
432 | != NULL) { | |
61ec970d | 433 | /* Point to area for the counter and object names */ |
8c841523 | 434 | lpCurrentString = (LPSTR) & cygwin_load.perf->NamesArray[dwArraySize + 1]; |
61ec970d PH |
435 | continue; |
436 | } | |
437 | DEBUG(D_load) debug_printf("Malloc: errno %d (%s)\n", errno, strerror(errno)); | |
438 | } | |
439 | else { /* Serious error */ | |
440 | DEBUG(D_load) debug_printf("RegQueryValueEx (2): error %ld (Windows)\n", res); | |
441 | } | |
442 | return FALSE; | |
443 | } | |
444 | RegCloseKey( hKeyPerflib ); | |
445 | /* Index the names into an array. */ | |
446 | while (*lpCurrentString) { | |
447 | dwCounter = atol( lpCurrentString ); | |
448 | lpCurrentString += (lstrlen(lpCurrentString)+1); | |
8c841523 | 449 | cygwin_load.perf->NamesArray[dwCounter] = lpCurrentString; |
61ec970d PH |
450 | lpCurrentString += (strlen(lpCurrentString)+1); |
451 | } | |
452 | return TRUE; | |
453 | } | |
454 | ||
455 | /***************************************************************** | |
456 | * | |
457 | Find the value of the Processor Time counter | |
458 | ||
459 | *****************************************************************/ | |
460 | static BOOL ReadTimeCtr(PPERF_OBJECT_TYPE PerfObj, | |
8c841523 PH |
461 | PPERF_COUNTER_DEFINITION CurCntr, |
462 | PPERF_COUNTER_BLOCK PtrToCntr, | |
463 | unsigned long long * TimePtr){ | |
61ec970d PH |
464 | int j; |
465 | /* Scan all counters. */ | |
466 | for( j = 0; j < PerfObj->NumCounters; j++ ) { | |
467 | if (CurCntr->CounterNameTitleIndex == PROCESSOR_TIME_COUNTER) { | |
468 | /* Verify it is really the proc time counter */ | |
469 | if ((CurCntr->CounterType != PERF_100NSEC_TIMER_INV) || /* Wrong type */ | |
8c841523 PH |
470 | ((cygwin_load.perf->NamesArray != NULL) && /* Verify name */ |
471 | (strcmp(cygwin_load.perf->NamesArray[CurCntr->CounterNameTitleIndex], | |
472 | PROCESSOR_TIME_NAME)))) { | |
473 | log_write(0, LOG_MAIN|LOG_PANIC, | |
61ec970d | 474 | "Incorrect Perf counter type or name %x %s", |
8c841523 PH |
475 | (unsigned) CurCntr->CounterType, |
476 | cygwin_load.perf->NamesArray[CurCntr->CounterNameTitleIndex]); | |
477 | return FALSE; | |
61ec970d PH |
478 | } |
479 | *TimePtr += *(unsigned long long int *) ((PBYTE) PtrToCntr + CurCntr->CounterOffset); | |
480 | return TRUE; /* return TRUE as soon as we found the counter */ | |
481 | } | |
482 | /* Get the next counter. */ | |
483 | CurCntr = NextCounter( CurCntr ); | |
484 | } | |
485 | return FALSE; | |
486 | } | |
8c841523 | 487 | |
61ec970d PH |
488 | /***************************************************************** |
489 | * | |
490 | ReadStat() | |
491 | Measures current Time100ns and IdleCount | |
492 | Return TRUE if success. | |
493 | ||
494 | *****************************************************************/ | |
8c841523 PH |
495 | static BOOL ReadStat(unsigned long long int *Time100nsPtr, |
496 | unsigned long long int * IdleCountPtr) | |
61ec970d PH |
497 | { |
498 | PPERF_OBJECT_TYPE PerfObj; | |
499 | PPERF_INSTANCE_DEFINITION PerfInst; | |
500 | PPERF_COUNTER_DEFINITION PerfCntr; | |
501 | PPERF_COUNTER_BLOCK PtrToCntr; | |
502 | DWORD i, k, res; | |
503 | ||
504 | /* Get the performance data for the Processor object | |
505 | There is no need to open a key. | |
506 | We may need to blindly increase the buffer size. | |
507 | BufferSize does not return info but may be changed */ | |
508 | while (1) { | |
8c841523 | 509 | DWORD BufferSize = cygwin_load.perf->BufferSize; |
61ec970d | 510 | res = RegQueryValueEx( HKEY_PERFORMANCE_DATA, |
8c841523 PH |
511 | PROCESSOR_OBJECT_STRING, |
512 | NULL, | |
513 | NULL, | |
514 | (LPBYTE) cygwin_load.perf->PerfData, | |
515 | &BufferSize ); | |
61ec970d PH |
516 | if (res == ERROR_SUCCESS) break; |
517 | if (res == ERROR_MORE_DATA ) { | |
518 | /* Increment if necessary to get a buffer that is big enough. */ | |
8c841523 PH |
519 | cygwin_load.perf->BufferSize += BYTEINCREMENT; |
520 | if ((cygwin_load.perf->PerfData = | |
521 | (PPERF_DATA_BLOCK) realloc( cygwin_load.perf->PerfData, cygwin_load.perf->BufferSize )) | |
522 | != NULL) continue; | |
61ec970d PH |
523 | DEBUG(D_load) debug_printf("Malloc: errno %d (%s)\n", errno, strerror(errno)); |
524 | } | |
525 | else { /* Serious error */ | |
526 | DEBUG(D_load) debug_printf("RegQueryValueEx (3): error %ld (Windows)\n", res); | |
527 | } | |
528 | return FALSE; | |
529 | } | |
530 | /* Initialize the counters */ | |
531 | *Time100nsPtr = 0; | |
532 | *IdleCountPtr = 0; | |
533 | /* We should only have one object, but write general code just in case. */ | |
8c841523 PH |
534 | PerfObj = FirstObject( cygwin_load.perf->PerfData ); |
535 | for( i = 0; i < cygwin_load.perf->PerfData->NumObjectTypes; i++ ) { | |
61ec970d PH |
536 | /* We are only interested in the processor object */ |
537 | if ( PerfObj->ObjectNameTitleIndex == PROCESSOR_OBJECT_INDEX) { | |
538 | /* Possibly verify it is really the Processor object. */ | |
8c841523 PH |
539 | if ((cygwin_load.perf->NamesArray != NULL) && |
540 | (strcmp(cygwin_load.perf->NamesArray[PerfObj->ObjectNameTitleIndex], | |
541 | PROCESSOR_OBJECT_NAME))) { | |
542 | log_write(0, LOG_MAIN|LOG_PANIC, | |
543 | "Incorrect Perf object name %s", | |
544 | cygwin_load.perf->NamesArray[PerfObj->ObjectNameTitleIndex]); | |
545 | return FALSE; | |
61ec970d PH |
546 | } |
547 | /* Get the first counter */ | |
548 | PerfCntr = FirstCounter( PerfObj ); | |
549 | /* See if the object has instances. | |
8c841523 | 550 | It should, but write general code. */ |
61ec970d | 551 | if( PerfObj->NumInstances != PERF_NO_INSTANCES ) { |
8c841523 PH |
552 | PerfInst = FirstInstance( PerfObj ); |
553 | for( k = 0; k < PerfObj->NumInstances; k++ ) { | |
554 | /* There can be several processors. | |
61ec970d | 555 | Accumulate both the Time100ns and the idle counter. |
8c841523 PH |
556 | Starting with Win2000 there is an instance named "_Total". |
557 | Do not use it. We only use instances with a single | |
61ec970d PH |
558 | character in the name. |
559 | If we examine the object names, we also look at the instance | |
560 | names and their lengths and issue reports */ | |
8c841523 | 561 | if ( cygwin_load.perf->NamesArray != NULL) { |
61ec970d | 562 | CHAR ascii[30]; /* The name is in unicode */ |
8c841523 PH |
563 | wsprintf(ascii,"%.29lS", |
564 | (char *)((PBYTE)PerfInst + PerfInst->NameOffset)); | |
565 | log_write(0, LOG_MAIN, | |
61ec970d PH |
566 | "Perf: Found processor instance \"%s\", length %d", |
567 | ascii, PerfInst->NameLength); | |
8c841523 | 568 | if ((PerfInst->NameLength != 4) && |
61ec970d | 569 | (strcmp(ascii, "_Total") != 0)) { |
8c841523 | 570 | log_write(0, LOG_MAIN|LOG_PANIC, |
61ec970d | 571 | "Perf: WARNING: Unexpected processor instance name"); |
8c841523 | 572 | return FALSE; |
61ec970d PH |
573 | } |
574 | } | |
8c841523 PH |
575 | if (PerfInst->NameLength == 4) { |
576 | *Time100nsPtr += cygwin_load.perf->PerfData->PerfTime100nSec.QuadPart; | |
577 | PtrToCntr = InstanceCounterBlock(PerfInst); | |
578 | if (! ReadTimeCtr(PerfObj, PerfCntr, PtrToCntr, IdleCountPtr)) { | |
579 | return FALSE; | |
580 | } | |
61ec970d | 581 | } |
8c841523 PH |
582 | PerfInst = NextInstance( PerfInst ); |
583 | } | |
61ec970d PH |
584 | return (*Time100nsPtr != 0); /* Something was read */ |
585 | } | |
586 | else { /* No instance, just the counter data */ | |
8c841523 PH |
587 | *Time100nsPtr = cygwin_load.perf->PerfData->PerfTime100nSec.QuadPart; |
588 | PtrToCntr = ObjectCounterBlock(PerfObj); | |
589 | return ReadTimeCtr(PerfObj, PerfCntr, PtrToCntr, IdleCountPtr); | |
61ec970d PH |
590 | } |
591 | } | |
592 | PerfObj = NextObject( PerfObj ); | |
593 | } | |
594 | return FALSE; /* Did not find the Processor object */ | |
595 | } | |
596 | ||
8c841523 PH |
597 | #elif defined(PERF_METHOD2) |
598 | ||
599 | /************************************************************* | |
600 | METHOD 2 | |
601 | ||
602 | Uses NtQuerySystemInformation. | |
603 | This requires definitions that are not part of | |
604 | standard include files. | |
605 | *************************************************************/ | |
606 | #include <ntdef.h> | |
607 | ||
608 | typedef enum _SYSTEM_INFORMATION_CLASS | |
609 | { | |
610 | SystemBasicInformation = 0, | |
611 | SystemPerformanceInformation = 2, | |
612 | SystemTimeOfDayInformation = 3, | |
613 | SystemProcessesAndThreadsInformation = 5, | |
614 | SystemProcessorTimes = 8, | |
615 | SystemPagefileInformation = 18, | |
616 | /* There are a lot more of these... */ | |
617 | } SYSTEM_INFORMATION_CLASS; | |
618 | ||
619 | typedef struct _SYSTEM_BASIC_INFORMATION | |
620 | { | |
621 | ULONG Unknown; | |
622 | ULONG MaximumIncrement; | |
623 | ULONG PhysicalPageSize; | |
624 | ULONG NumberOfPhysicalPages; | |
625 | ULONG LowestPhysicalPage; | |
626 | ULONG HighestPhysicalPage; | |
627 | ULONG AllocationGranularity; | |
628 | ULONG LowestUserAddress; | |
629 | ULONG HighestUserAddress; | |
630 | ULONG ActiveProcessors; | |
631 | UCHAR NumberProcessors; | |
632 | } SYSTEM_BASIC_INFORMATION, *PSYSTEM_BASIC_INFORMATION; | |
633 | ||
634 | typedef struct __attribute__ ((aligned (8))) _SYSTEM_PROCESSOR_TIMES | |
635 | { | |
636 | LARGE_INTEGER IdleTime; | |
637 | LARGE_INTEGER KernelTime; | |
638 | LARGE_INTEGER UserTime; | |
639 | LARGE_INTEGER DpcTime; | |
640 | LARGE_INTEGER InterruptTime; | |
641 | ULONG InterruptCount; | |
642 | } SYSTEM_PROCESSOR_TIMES, *PSYSTEM_PROCESSOR_TIMES; | |
643 | ||
644 | typedef NTSTATUS NTAPI (*NtQuerySystemInformation_t) (SYSTEM_INFORMATION_CLASS, PVOID, ULONG, PULONG); | |
645 | typedef ULONG NTAPI (*RtlNtStatusToDosError_t) (NTSTATUS); | |
646 | ||
647 | static NtQuerySystemInformation_t NtQuerySystemInformation; | |
648 | static RtlNtStatusToDosError_t RtlNtStatusToDosError; | |
649 | ||
650 | /***************************************************************** | |
651 | * | |
652 | LoadNtdll() | |
653 | Load special functions from the NTDLL | |
654 | Return TRUE if success. | |
655 | ||
656 | *****************************************************************/ | |
657 | ||
658 | static BOOL LoadNtdll() | |
659 | { | |
660 | HINSTANCE hinstLib; | |
661 | ||
662 | if ((hinstLib = LoadLibrary("NTDLL.DLL")) | |
663 | && (NtQuerySystemInformation = | |
664 | (NtQuerySystemInformation_t) GetProcAddress(hinstLib, | |
665 | "NtQuerySystemInformation")) | |
666 | && (RtlNtStatusToDosError = | |
667 | (RtlNtStatusToDosError_t) GetProcAddress(hinstLib, | |
668 | "RtlNtStatusToDosError"))) | |
669 | return TRUE; | |
670 | ||
671 | DEBUG(D_load) | |
672 | debug_printf("perf: load: %ld (Windows)\n", GetLastError()); | |
673 | return FALSE; | |
674 | } | |
675 | ||
676 | /***************************************************************** | |
677 | * | |
678 | ReadStat() | |
679 | Measures current Time100ns and IdleCount | |
680 | Return TRUE if success. | |
681 | ||
682 | *****************************************************************/ | |
683 | ||
684 | static BOOL ReadStat(unsigned long long int *Time100nsPtr, | |
685 | unsigned long long int *IdleCountPtr) | |
686 | { | |
687 | NTSTATUS ret; | |
688 | SYSTEM_BASIC_INFORMATION sbi; | |
689 | PSYSTEM_PROCESSOR_TIMES spt; | |
690 | ||
691 | *Time100nsPtr = *IdleCountPtr = 0; | |
692 | ||
693 | if ((ret = NtQuerySystemInformation(SystemBasicInformation, | |
694 | (PVOID) &sbi, sizeof sbi, NULL)) | |
695 | != STATUS_SUCCESS) { | |
696 | DEBUG(D_load) | |
697 | debug_printf("Perf: NtQuerySystemInformation: %lu (Windows)\n", | |
698 | RtlNtStatusToDosError(ret)); | |
699 | } | |
700 | else if (!(spt = (PSYSTEM_PROCESSOR_TIMES) alloca(sizeof(spt[0]) * sbi.NumberProcessors))) { | |
701 | DEBUG(D_load) | |
702 | debug_printf("Perf: alloca: errno %d (%s)\n", errno, strerror(errno)); | |
703 | } | |
704 | else if ((ret = NtQuerySystemInformation(SystemProcessorTimes, (PVOID) spt, | |
705 | sizeof spt[0] * sbi.NumberProcessors, NULL)) | |
706 | != STATUS_SUCCESS) { | |
707 | DEBUG(D_load) | |
708 | debug_printf("Perf: NtQuerySystemInformation: %lu (Windows)\n", | |
709 | RtlNtStatusToDosError(ret)); | |
710 | } | |
711 | else { | |
712 | int i; | |
713 | for (i = 0; i < sbi.NumberProcessors; i++) { | |
714 | *Time100nsPtr += spt[i].KernelTime.QuadPart;; | |
715 | *Time100nsPtr += spt[i].UserTime.QuadPart; | |
716 | *IdleCountPtr += spt[i].IdleTime.QuadPart; | |
717 | } | |
718 | return TRUE; | |
719 | } | |
720 | return FALSE; | |
721 | } | |
722 | #endif /* PERF_METHODX */ | |
723 | ||
61ec970d PH |
724 | /***************************************************************** |
725 | * | |
726 | InitLoadAvg() | |
8c841523 PH |
727 | Initialize the cygwin_load.perf structure. |
728 | and set cygwin_load.perf->Flag to TRUE if successful. | |
61ec970d PH |
729 | This is called the first time os_getloadavg is called |
730 | *****************************************************************/ | |
8c841523 | 731 | static void InitLoadAvg(cygwin_perf_t *this) |
61ec970d PH |
732 | { |
733 | BOOL success = TRUE; | |
8c841523 | 734 | |
61ec970d | 735 | /* Get perf frequency and counter */ |
8c841523 PH |
736 | QueryPerformanceFrequency((LARGE_INTEGER *)& this->PerfFreq); |
737 | QueryPerformanceCounter((LARGE_INTEGER *)& this->LastCounter); | |
738 | ||
739 | #ifdef PERF_METHOD1 | |
61ec970d PH |
740 | DEBUG(D_load) { |
741 | /* Get the name strings through the registry | |
742 | to verify that the object and counter numbers | |
743 | have the names we expect */ | |
744 | success = GetNameStrings(); | |
745 | } | |
8c841523 PH |
746 | #endif |
747 | /* Get initial values for Time100ns and IdleCount */ | |
748 | success = success | |
749 | && ReadStat( & this->Time100ns, | |
750 | & this->IdleCount); | |
61ec970d | 751 | /* If success, set the Load to 0, else to -1 */ |
8c841523 | 752 | if (success) this->LastLoad = 0; |
61ec970d PH |
753 | else { |
754 | log_write(0, LOG_MAIN, "Cannot obtain Load Average"); | |
8c841523 | 755 | this->LastLoad = -1; |
61ec970d | 756 | } |
8c841523 | 757 | #ifdef PERF_METHOD1 |
61ec970d | 758 | /* Free the buffer created for debug name verification */ |
8c841523 PH |
759 | if (this->NamesArray != NULL) { |
760 | free(this->NamesArray); | |
761 | this->NamesArray = NULL; | |
61ec970d | 762 | } |
8c841523 | 763 | #endif |
61ec970d | 764 | } |
8c841523 PH |
765 | |
766 | ||
61ec970d PH |
767 | /***************************************************************** |
768 | * | |
769 | os_getloadavg() | |
770 | ||
771 | Return -1 if not available; | |
772 | Return the previous value if less than AVERAGING sec old. | |
773 | else return the processor load on a [0 - 1000] scale. | |
774 | ||
775 | The first time we are called we initialize the counts | |
776 | and return 0 or -1. | |
8c841523 | 777 | The initial load cannot be measured as we use the processor 100% |
61ec970d | 778 | *****************************************************************/ |
8c841523 | 779 | static SECURITY_ATTRIBUTES sa = {sizeof (SECURITY_ATTRIBUTES), NULL, TRUE}; |
61ec970d | 780 | #define AVERAGING 10 |
8c841523 | 781 | |
61ec970d PH |
782 | int os_getloadavg() |
783 | { | |
8c841523 | 784 | unsigned long long Time100ns, IdleCount, CurrCounter; |
61ec970d | 785 | int value; |
8c841523 PH |
786 | pid_t newpid; |
787 | ||
788 | /* New process. | |
789 | Reload the dlls and the file mapping */ | |
790 | if ((newpid = getpid()) != cygwin_load.pid) { | |
791 | BOOL new; | |
792 | cygwin_load.pid = newpid; | |
793 | ||
794 | #ifdef PERF_METHOD2 | |
795 | if (!LoadNtdll()) { | |
796 | log_write(0, LOG_MAIN, "Cannot obtain Load Average"); | |
797 | cygwin_load.perf = NULL; | |
798 | return -1; | |
799 | } | |
800 | #endif | |
801 | ||
802 | if ((new = !cygwin_load.handle)) { | |
803 | cygwin_load.handle = CreateFileMapping (INVALID_HANDLE_VALUE, &sa, PAGE_READWRITE, | |
804 | 0, sizeof(cygwin_perf_t), NULL); | |
805 | DEBUG(D_load) | |
806 | debug_printf("Perf: CreateFileMapping: handle %x\n", (unsigned) cygwin_load.handle); | |
807 | } | |
808 | cygwin_load.perf = (cygwin_perf_t *) MapViewOfFile (cygwin_load.handle, | |
809 | FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0); | |
810 | DEBUG(D_load) | |
811 | debug_printf("Perf: MapViewOfFile: addr %x\n", (unsigned) cygwin_load.perf); | |
812 | if (new && cygwin_load.perf) | |
813 | InitLoadAvg(cygwin_load.perf); | |
814 | } | |
815 | ||
816 | /* Check if initialized OK */ | |
817 | if (!cygwin_load.perf || cygwin_load.perf->LastLoad < 0) | |
818 | return -1; | |
819 | ||
820 | /* If we cannot get the lock, we return 0. | |
821 | This is to prevent any lock-up possibility. | |
822 | Finding a lock busy is unlikely, and giving up only | |
823 | results in an immediate delivery .*/ | |
824 | ||
825 | if (InterlockedCompareExchange(&cygwin_load.perf->Lock, 1, 0)) { | |
826 | DEBUG(D_load) | |
827 | debug_printf("Perf: Lock busy\n"); | |
828 | return 0; | |
829 | } | |
61ec970d | 830 | |
61ec970d PH |
831 | /* Get the current time (PerfCounter) */ |
832 | QueryPerformanceCounter((LARGE_INTEGER *)& CurrCounter); | |
833 | /* Calls closer than AVERAGING sec apart use the previous value */ | |
8c841523 PH |
834 | if (CurrCounter - cygwin_load.perf->LastCounter > |
835 | AVERAGING * cygwin_load.perf->PerfFreq) { | |
61ec970d PH |
836 | /* Get Time100ns and IdleCount */ |
837 | if (ReadStat( & Time100ns, & IdleCount)) { /* Success */ | |
8c841523 PH |
838 | /* Return processor load on 1000 scale */ |
839 | value = 1000 - ((1000 * (IdleCount - cygwin_load.perf->IdleCount)) / | |
840 | (Time100ns - cygwin_load.perf->Time100ns)); | |
841 | cygwin_load.perf->Time100ns = Time100ns; | |
842 | cygwin_load.perf->IdleCount = IdleCount; | |
843 | cygwin_load.perf->LastCounter = CurrCounter; | |
844 | cygwin_load.perf->LastLoad = value; | |
845 | DEBUG(D_load) | |
846 | debug_printf("Perf: New load average %d\n", value); | |
61ec970d PH |
847 | } |
848 | else { /* Something bad happened. | |
8c841523 PH |
849 | Refuse to measure the load anymore |
850 | but don't bother releasing the buffer */ | |
61ec970d | 851 | log_write(0, LOG_MAIN, "Cannot obtain Load Average"); |
8c841523 | 852 | cygwin_load.perf->LastLoad = -1; |
61ec970d PH |
853 | } |
854 | } | |
8c841523 | 855 | else |
61ec970d | 856 | DEBUG(D_load) |
8c841523 PH |
857 | debug_printf("Perf: Old load average %d\n", cygwin_load.perf->LastLoad); |
858 | cygwin_load.perf->Lock = 0; | |
859 | return cygwin_load.perf->LastLoad; | |
61ec970d PH |
860 | } |
861 | #endif /* OS_LOAD_AVERAGE */ | |
862 | #endif /* COMPILE_UTILITY */ |