1// Copyright (c) 2009-2010 Satoshi Nakamoto
2// Copyright (c) 2009-2012 The Bitcoin developers
3// Distributed under the MIT/X11 software license, see the accompanying
4// file license.txt or http://www.opensource.org/licenses/mit-license.php.
5#include "knobs.h"
6#include "headers.h"
7#include "strlcpy.h"
8#include <boost/program_options/detail/config_file.hpp>
9#include <boost/program_options/parsers.hpp>
10#include <boost/filesystem.hpp>
11#include <boost/filesystem/fstream.hpp>
12#include <boost/interprocess/sync/interprocess_mutex.hpp>
13#include <boost/interprocess/sync/interprocess_recursive_mutex.hpp>
14#include <boost/foreach.hpp>
15
16using namespace std;
17using namespace boost;
18
19map<string, string> mapArgs;
20map<string, vector<string> > mapMultiArgs;
21bool fDebug = false;
22bool fPrintToConsole = false;
23bool fPrintToDebugger = false;
24bool fCanEat = false;
25bool fVerifyAll = false;
26char pszSetDataDir[MAX_PATH] = "";
27bool fRequestShutdown = false;
28bool fShutdown = false;
29bool fDaemon = false;
30bool fServer = false;
31bool fCommandLine = false;
32string strMiscWarning;
33bool fNoListen = false;
34bool fLogTimestamps = false;
35bool fLowS = false;
36bool fHighS = false;
37
38std::string CLIENT_NAME(DEFAULT_CLIENT_NAME);
39
40
41// Workaround for "multiple definition of `_tls_used'"
42// http://svn.boost.org/trac/boost/ticket/4258
43extern "C" void tss_cleanup_implemented() { }
44
45
46
47
48
49// Init openssl library multithreading support
50static boost::interprocess::interprocess_mutex** ppmutexOpenSSL;
51void locking_callback(int mode, int i, const char* file, int line)
52{
53 if (mode & CRYPTO_LOCK)
54 ppmutexOpenSSL[i]->lock();
55 else
56 ppmutexOpenSSL[i]->unlock();
57}
58
59// Init
60class CInit
61{
62public:
63 CInit()
64 {
65 // Init openssl library multithreading support
66 ppmutexOpenSSL = (boost::interprocess::interprocess_mutex**)OPENSSL_malloc(CRYPTO_num_locks() * sizeof(boost::interprocess::interprocess_mutex*));
67 for (int i = 0; i < CRYPTO_num_locks(); i++)
68 ppmutexOpenSSL[i] = new boost::interprocess::interprocess_mutex();
69 CRYPTO_set_locking_callback(locking_callback);
70
71 // Seed random number generator with performance counter
72 RandAddSeed();
73 }
74 ~CInit()
75 {
76 // Shutdown openssl library multithreading support
77 CRYPTO_set_locking_callback(NULL);
78 for (int i = 0; i < CRYPTO_num_locks(); i++)
79 delete ppmutexOpenSSL[i];
80 OPENSSL_free(ppmutexOpenSSL);
81 }
82}
83instance_of_cinit;
84
85
86
87
88
89
90
91
92void RandAddSeed()
93{
94 // Seed with CPU performance counter
95 int64 nCounter = GetPerformanceCounter();
96 RAND_add(&nCounter, sizeof(nCounter), 1.5);
97 memset(&nCounter, 0, sizeof(nCounter));
98}
99
100void RandAddSeedPerfmon()
101{
102 RandAddSeed();
103
104 // This can take up to 2 seconds, so only do it every 10 minutes
105 static int64 nLastPerfmon;
106 if (GetTime() < nLastPerfmon + 10 * 60)
107 return;
108 nLastPerfmon = GetTime();
109
110}
111
112uint64 GetRand(uint64 nMax)
113{
114 if (nMax == 0)
115 return 0;
116
117 // The range of the random source must be a multiple of the modulus
118 // to give every possible output value an equal possibility
119 uint64 nRange = (UINT64_MAX / nMax) * nMax;
120 uint64 nRand = 0;
121 do
122 RAND_bytes((unsigned char*)&nRand, sizeof(nRand));
123 while (nRand >= nRange);
124 return (nRand % nMax);
125}
126
127int GetRandInt(int nMax)
128{
129 return GetRand(nMax);
130}
131
132
133
134
135
136
137
138
139
140
141
142inline int OutputDebugStringF(const char* pszFormat, ...)
143{
144 int ret = 0;
145 if (fPrintToConsole)
146 {
147 // print to console
148 va_list arg_ptr;
149 va_start(arg_ptr, pszFormat);
150 ret = vprintf(pszFormat, arg_ptr);
151 va_end(arg_ptr);
152 }
153 else
154 {
155 // print to debug.log
156 static FILE* fileout = NULL;
157
158 if (!fileout)
159 {
160 char pszFile[MAX_PATH+100];
161 GetDataDir(pszFile);
162 strlcat(pszFile, "/debug.log", sizeof(pszFile));
163 fileout = fopen(pszFile, "a");
164 if (fileout) setbuf(fileout, NULL); // unbuffered
165 }
166 if (fileout)
167 {
168 static bool fStartedNewLine = true;
169
170 // Debug print useful for profiling
171 if (fLogTimestamps && fStartedNewLine)
172 fprintf(fileout, "%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
173 if (pszFormat[strlen(pszFormat) - 1] == '\n')
174 fStartedNewLine = true;
175 else
176 fStartedNewLine = false;
177
178 va_list arg_ptr;
179 va_start(arg_ptr, pszFormat);
180 ret = vfprintf(fileout, pszFormat, arg_ptr);
181 va_end(arg_ptr);
182 }
183 }
184
185 return ret;
186}
187
188
189// Safer snprintf
190// - prints up to limit-1 characters
191// - output string is always null terminated even if limit reached
192// - return value is the number of characters actually printed
193int my_snprintf(char* buffer, size_t limit, const char* format, ...)
194{
195 if (limit == 0)
196 return 0;
197 va_list arg_ptr;
198 va_start(arg_ptr, format);
199 int ret = _vsnprintf(buffer, limit, format, arg_ptr);
200 va_end(arg_ptr);
201 if (ret < 0 || ret >= limit)
202 {
203 ret = limit - 1;
204 buffer[limit-1] = 0;
205 }
206 return ret;
207}
208
209string strprintf(const std::string &format, ...)
210{
211 char buffer[50000];
212 char* p = buffer;
213 int limit = sizeof(buffer);
214 int ret;
215 loop
216 {
217 va_list arg_ptr;
218 va_start(arg_ptr, format);
219 ret = _vsnprintf(p, limit, format.c_str(), arg_ptr);
220 va_end(arg_ptr);
221 if (ret >= 0 && ret < limit)
222 break;
223 if (p != buffer)
224 delete[] p;
225 limit *= 2;
226 p = new char[limit];
227 if (p == NULL)
228 throw std::bad_alloc();
229 }
230 string str(p, p+ret);
231 if (p != buffer)
232 delete[] p;
233 return str;
234}
235
236bool error(const std::string &format, ...)
237{
238 char buffer[50000];
239 int limit = sizeof(buffer);
240 va_list arg_ptr;
241 va_start(arg_ptr, format);
242 int ret = _vsnprintf(buffer, limit, format.c_str(), arg_ptr);
243 va_end(arg_ptr);
244 if (ret < 0 || ret >= limit)
245 {
246 ret = limit - 1;
247 buffer[limit-1] = 0;
248 }
249 printf("ERROR: %s\n", buffer);
250 return false;
251}
252
253
254void ParseString(const string& str, char c, vector<string>& v)
255{
256 if (str.empty())
257 return;
258 string::size_type i1 = 0;
259 string::size_type i2;
260 loop
261 {
262 i2 = str.find(c, i1);
263 if (i2 == str.npos)
264 {
265 v.push_back(str.substr(i1));
266 return;
267 }
268 v.push_back(str.substr(i1, i2-i1));
269 i1 = i2+1;
270 }
271}
272
273
274string FormatMoney(int64 n, bool fPlus)
275{
276 // Note: not using straight sprintf here because we do NOT want
277 // localized number formatting.
278 int64 n_abs = (n > 0 ? n : -n);
279 int64 quotient = n_abs/COIN;
280 int64 remainder = n_abs%COIN;
281 string str = strprintf("%"PRI64d".%08"PRI64d, quotient, remainder);
282
283 // Right-trim excess 0's before the decimal point:
284 int nTrim = 0;
285 for (int i = str.size()-1; (str[i] == '0' && isdigit(str[i-2])); --i)
286 ++nTrim;
287 if (nTrim)
288 str.erase(str.size()-nTrim, nTrim);
289
290 if (n < 0)
291 str.insert((unsigned int)0, 1, '-');
292 else if (fPlus && n > 0)
293 str.insert((unsigned int)0, 1, '+');
294 return str;
295}
296
297
298bool ParseMoney(const string& str, int64& nRet)
299{
300 return ParseMoney(str.c_str(), nRet);
301}
302
303bool ParseMoney(const char* pszIn, int64& nRet)
304{
305 string strWhole;
306 int64 nUnits = 0;
307 const char* p = pszIn;
308 while (isspace(*p))
309 p++;
310 for (; *p; p++)
311 {
312 if (*p == '.')
313 {
314 p++;
315 int64 nMult = CENT*10;
316 while (isdigit(*p) && (nMult > 0))
317 {
318 nUnits += nMult * (*p++ - '0');
319 nMult /= 10;
320 }
321 break;
322 }
323 if (isspace(*p))
324 break;
325 if (!isdigit(*p))
326 return false;
327 strWhole.insert(strWhole.end(), *p);
328 }
329 for (; *p; p++)
330 if (!isspace(*p))
331 return false;
332 if (strWhole.size() > 10) // guard against 63 bit overflow
333 return false;
334 if (nUnits < 0 || nUnits > COIN)
335 return false;
336 int64 nWhole = atoi64(strWhole);
337 int64 nValue = nWhole*COIN + nUnits;
338
339 nRet = nValue;
340 return true;
341}
342
343
344vector<unsigned char> ParseHex(const char* psz)
345{
346 static char phexdigit[256] =
347 { -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
348 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
349 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
350 0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,
351 -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
352 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
353 -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
354 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
355 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
356 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
357 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
358 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
359 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
360 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
361 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
362 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, };
363
364 // convert hex dump to vector
365 vector<unsigned char> vch;
366 loop
367 {
368 while (isspace(*psz))
369 psz++;
370 char c = phexdigit[(unsigned char)*psz++];
371 if (c == (char)-1)
372 break;
373 unsigned char n = (c << 4);
374 c = phexdigit[(unsigned char)*psz++];
375 if (c == (char)-1)
376 break;
377 n |= c;
378 vch.push_back(n);
379 }
380 return vch;
381}
382
383vector<unsigned char> ParseHex(const string& str)
384{
385 return ParseHex(str.c_str());
386}
387
388void ParseParameters(int argc, char* argv[])
389{
390 mapArgs.clear();
391 mapMultiArgs.clear();
392 for (int i = 1; i < argc; i++)
393 {
394 char psz[10000];
395 strlcpy(psz, argv[i], sizeof(psz));
396 char* pszValue = (char*)"";
397 if (strchr(psz, '='))
398 {
399 pszValue = strchr(psz, '=');
400 *pszValue++ = '\0';
401 }
402 if (psz[0] != '-')
403 break;
404 mapArgs[psz] = pszValue;
405 mapMultiArgs[psz].push_back(pszValue);
406 }
407}
408
409bool SoftSetArg(const std::string& strArg, const std::string& strValue)
410{
411 if (mapArgs.count(strArg))
412 return false;
413 mapArgs[strArg] = strValue;
414 return true;
415}
416
417bool SoftSetArg(const std::string& strArg, bool fValue)
418{
419 if (fValue)
420 return SoftSetArg(strArg, std::string("1"));
421 else
422 return SoftSetArg(strArg, std::string("0"));
423}
424
425
426string EncodeBase64(const unsigned char* pch, size_t len)
427{
428 static const char *pbase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
429
430 string strRet="";
431 strRet.reserve((len+2)/3*4);
432
433 int mode=0, left=0;
434 const unsigned char *pchEnd = pch+len;
435
436 while (pch<pchEnd)
437 {
438 int enc = *(pch++);
439 switch (mode)
440 {
441 case 0: // we have no bits
442 strRet += pbase64[enc >> 2];
443 left = (enc & 3) << 4;
444 mode = 1;
445 break;
446
447 case 1: // we have two bits
448 strRet += pbase64[left | (enc >> 4)];
449 left = (enc & 15) << 2;
450 mode = 2;
451 break;
452
453 case 2: // we have four bits
454 strRet += pbase64[left | (enc >> 6)];
455 strRet += pbase64[enc & 63];
456 mode = 0;
457 break;
458 }
459 }
460
461 if (mode)
462 {
463 strRet += pbase64[left];
464 strRet += '=';
465 if (mode == 1)
466 strRet += '=';
467 }
468
469 return strRet;
470}
471
472string EncodeBase64(const string& str)
473{
474 return EncodeBase64((const unsigned char*)str.c_str(), str.size());
475}
476
477vector<unsigned char> DecodeBase64(const char* p, bool* pfInvalid)
478{
479 static const int decode64_table[256] =
480 {
481 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
482 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
483 -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1,
484 -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
485 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28,
486 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
487 49, 50, 51, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
488 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
489 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
490 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
491 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
492 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
493 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
494 };
495
496 if (pfInvalid)
497 *pfInvalid = false;
498
499 vector<unsigned char> vchRet;
500 vchRet.reserve(strlen(p)*3/4);
501
502 int mode = 0;
503 int left = 0;
504
505 while (1)
506 {
507 int dec = decode64_table[*p];
508 if (dec == -1) break;
509 p++;
510 switch (mode)
511 {
512 case 0: // we have no bits and get 6
513 left = dec;
514 mode = 1;
515 break;
516
517 case 1: // we have 6 bits and keep 4
518 vchRet.push_back((left<<2) | (dec>>4));
519 left = dec & 15;
520 mode = 2;
521 break;
522
523 case 2: // we have 4 bits and get 6, we keep 2
524 vchRet.push_back((left<<4) | (dec>>2));
525 left = dec & 3;
526 mode = 3;
527 break;
528
529 case 3: // we have 2 bits and get 6
530 vchRet.push_back((left<<6) | dec);
531 mode = 0;
532 break;
533 }
534 }
535
536 if (pfInvalid)
537 switch (mode)
538 {
539 case 0: // 4n base64 characters processed: ok
540 break;
541
542 case 1: // 4n+1 base64 character processed: impossible
543 *pfInvalid = true;
544 break;
545
546 case 2: // 4n+2 base64 characters processed: require '=='
547 if (left || p[0] != '=' || p[1] != '=' || decode64_table[p[2]] != -1)
548 *pfInvalid = true;
549 break;
550
551 case 3: // 4n+3 base64 characters processed: require '='
552 if (left || p[0] != '=' || decode64_table[p[1]] != -1)
553 *pfInvalid = true;
554 break;
555 }
556
557 return vchRet;
558}
559
560string DecodeBase64(const string& str)
561{
562 vector<unsigned char> vchRet = DecodeBase64(str.c_str());
563 return string((const char*)&vchRet[0], vchRet.size());
564}
565
566
567bool WildcardMatch(const char* psz, const char* mask)
568{
569 loop
570 {
571 switch (*mask)
572 {
573 case '\0':
574 return (*psz == '\0');
575 case '*':
576 return WildcardMatch(psz, mask+1) || (*psz && WildcardMatch(psz+1, mask));
577 case '?':
578 if (*psz == '\0')
579 return false;
580 break;
581 default:
582 if (*psz != *mask)
583 return false;
584 break;
585 }
586 psz++;
587 mask++;
588 }
589}
590
591bool WildcardMatch(const string& str, const string& mask)
592{
593 return WildcardMatch(str.c_str(), mask.c_str());
594}
595
596
597
598
599
600
601
602
603void FormatException(char* pszMessage, std::exception* pex, const char* pszThread)
604{
605 const char* pszModule = "bitcoin";
606 if (pex)
607 snprintf(pszMessage, 1000,
608 "EXCEPTION: %s \n%s \n%s in %s \n", typeid(*pex).name(), pex->what(), pszModule, pszThread);
609 else
610 snprintf(pszMessage, 1000,
611 "UNKNOWN EXCEPTION \n%s in %s \n", pszModule, pszThread);
612}
613
614void LogException(std::exception* pex, const char* pszThread)
615{
616 char pszMessage[10000];
617 FormatException(pszMessage, pex, pszThread);
618 printf("\n%s", pszMessage);
619}
620
621void PrintException(std::exception* pex, const char* pszThread)
622{
623 char pszMessage[10000];
624 FormatException(pszMessage, pex, pszThread);
625 printf("\n\n************************\n%s\n", pszMessage);
626 fprintf(stderr, "\n\n************************\n%s\n", pszMessage);
627 strMiscWarning = pszMessage;
628 throw;
629}
630
631void ThreadOneMessageBox(string strMessage)
632{
633 // Skip message boxes if one is already open
634 static bool fMessageBoxOpen;
635 if (fMessageBoxOpen)
636 return;
637 fMessageBoxOpen = true;
638 ThreadSafeMessageBox(strMessage, "Bitcoin", wxOK | wxICON_EXCLAMATION);
639 fMessageBoxOpen = false;
640}
641
642void PrintExceptionContinue(std::exception* pex, const char* pszThread)
643{
644 char pszMessage[10000];
645 FormatException(pszMessage, pex, pszThread);
646 printf("\n\n************************\n%s\n", pszMessage);
647 fprintf(stderr, "\n\n************************\n%s\n", pszMessage);
648 strMiscWarning = pszMessage;
649}
650
651string GetDefaultDataDir()
652{
653 // Mac: ~/Library/Application Support/Bitcoin
654 // Unix: ~/.bitcoin
655 char* pszHome = getenv("HOME");
656 if (pszHome == NULL || strlen(pszHome) == 0)
657 pszHome = (char*)"/";
658 string strHome = pszHome;
659 if (strHome[strHome.size()-1] != '/')
660 strHome += '/';
661#ifdef MAC_OSX
662 // Mac
663 strHome += "Library/Application Support/";
664 filesystem::create_directory(strHome.c_str());
665 return strHome + "Bitcoin";
666#else
667 // Unix
668 return strHome + ".bitcoin";
669#endif
670}
671
672void GetDataDir(char* pszDir)
673{
674 // pszDir must be at least MAX_PATH length.
675 int nVariation;
676 if (pszSetDataDir[0] != 0)
677 {
678 strlcpy(pszDir, pszSetDataDir, MAX_PATH);
679 nVariation = 0;
680 }
681 else
682 {
683 // This can be called during exceptions by printf, so we cache the
684 // value so we don't have to do memory allocations after that.
685 static char pszCachedDir[MAX_PATH];
686 if (pszCachedDir[0] == 0)
687 strlcpy(pszCachedDir, GetDefaultDataDir().c_str(), sizeof(pszCachedDir));
688 strlcpy(pszDir, pszCachedDir, MAX_PATH);
689 nVariation = 1;
690 }
691 static bool pfMkdir[4];
692 if (!pfMkdir[nVariation])
693 {
694 pfMkdir[nVariation] = true;
695 boost::filesystem::create_directory(pszDir);
696 }
697}
698
699string GetDataDir()
700{
701 char pszDir[MAX_PATH];
702 GetDataDir(pszDir);
703 return pszDir;
704}
705
706string GetConfigFile()
707{
708 namespace fs = boost::filesystem;
709 fs::path pathConfig(GetArg("-conf", "bitcoin.conf"));
710 if (!pathConfig.is_complete())
711 pathConfig = fs::path(GetDataDir()) / pathConfig;
712 return pathConfig.string();
713}
714
715void ReadConfigFile(map<string, string>& mapSettingsRet,
716 map<string, vector<string> >& mapMultiSettingsRet)
717{
718 namespace fs = boost::filesystem;
719 namespace pod = boost::program_options::detail;
720
721 fs::ifstream streamConfig(GetConfigFile());
722 if (!streamConfig.good())
723 return;
724
725 set<string> setOptions;
726 setOptions.insert("*");
727
728 for (pod::config_file_iterator it(streamConfig, setOptions), end; it != end; ++it)
729 {
730 // Don't overwrite existing settings so command line settings override bitcoin.conf
731 string strKey = string("-") + it->string_key;
732 if (mapSettingsRet.count(strKey) == 0)
733 mapSettingsRet[strKey] = it->value[0];
734 mapMultiSettingsRet[strKey].push_back(it->value[0]);
735 }
736}
737
738string GetPidFile()
739{
740 namespace fs = boost::filesystem;
741 fs::path pathConfig(GetArg("-pid", "bitcoind.pid"));
742 if (!pathConfig.is_complete())
743 pathConfig = fs::path(GetDataDir()) / pathConfig;
744 return pathConfig.string();
745}
746
747void CreatePidFile(string pidFile, pid_t pid)
748{
749 FILE* file = fopen(pidFile.c_str(), "w");
750 if (file)
751 {
752 fprintf(file, "%d\n", pid);
753 fclose(file);
754 }
755}
756
757int GetFilesize(FILE* file)
758{
759 int nSavePos = ftell(file);
760 int nFilesize = -1;
761 if (fseek(file, 0, SEEK_END) == 0)
762 nFilesize = ftell(file);
763 fseek(file, nSavePos, SEEK_SET);
764 return nFilesize;
765}
766
767void ShrinkDebugFile()
768{
769 // Scroll debug.log if it's getting too big
770 string strFile = GetDataDir() + "/debug.log";
771 FILE* file = fopen(strFile.c_str(), "r");
772 if (file && GetFilesize(file) > 10 * 1000000)
773 {
774 // Restart the file with some of the end
775 char pch[200000];
776 fseek(file, -sizeof(pch), SEEK_END);
777 int nBytes = fread(pch, 1, sizeof(pch), file);
778 fclose(file);
779
780 file = fopen(strFile.c_str(), "w");
781 if (file)
782 {
783 fwrite(pch, 1, nBytes, file);
784 fclose(file);
785 }
786 }
787}
788
789
790
791
792
793
794
795
796//
797// "Never go to sea with two chronometers; take one or three."
798// Our three time sources are:
799// - System clock
800// - Median of other nodes's clocks
801// - The user (asking the user to fix the system clock if the first two disagree)
802//
803static int64 nMockTime = 0; // For unit testing
804
805int64 GetTime()
806{
807 if (nMockTime) return nMockTime;
808
809 return time(NULL);
810}
811
812void SetMockTime(int64 nMockTimeIn)
813{
814 nMockTime = nMockTimeIn;
815}
816
817static int64 nTimeOffset = 0;
818
819int64 GetAdjustedTime()
820{
821 return GetTime() + nTimeOffset;
822}
823
824void AddTimeData(unsigned int ip, int64 nTime)
825{
826 int64 nOffsetSample = nTime - GetTime();
827
828 // Ignore duplicates
829 static set<unsigned int> setKnown;
830 if (!setKnown.insert(ip).second)
831 return;
832
833 // Add data
834 static vector<int64> vTimeOffsets;
835 if (vTimeOffsets.empty())
836 vTimeOffsets.push_back(0);
837 vTimeOffsets.push_back(nOffsetSample);
838 printf("Added time data, samples %d, offset %+"PRI64d" (%+"PRI64d" minutes)\n", vTimeOffsets.size(), vTimeOffsets.back(), vTimeOffsets.back()/60);
839 if (vTimeOffsets.size() >= 5 && vTimeOffsets.size() % 2 == 1)
840 {
841 sort(vTimeOffsets.begin(), vTimeOffsets.end());
842 int64 nMedian = vTimeOffsets[vTimeOffsets.size()/2];
843 // Only let other nodes change our time by so much
844 if (abs64(nMedian) < 70 * 60)
845 {
846 nTimeOffset = nMedian;
847 }
848 else
849 {
850 nTimeOffset = 0;
851
852 static bool fDone;
853 if (!fDone)
854 {
855 // If nobody has a time different than ours but within 5 minutes of ours, give a warning
856 bool fMatch = false;
857 BOOST_FOREACH(int64 nOffset, vTimeOffsets)
858 if (nOffset != 0 && abs64(nOffset) < 5 * 60)
859 fMatch = true;
860
861 if (!fMatch)
862 {
863 fDone = true;
864 string strMessage = _("Warning: Please check that your computer's date and time are correct. If your clock is wrong Bitcoin will not work properly.");
865 strMiscWarning = strMessage;
866 printf("*** %s\n", strMessage.c_str());
867 boost::thread(boost::bind(ThreadSafeMessageBox, strMessage+" ", string("Bitcoin"), wxOK | wxICON_EXCLAMATION, (wxWindow*)NULL, -1, -1));
868 }
869 }
870 }
871 BOOST_FOREACH(int64 n, vTimeOffsets)
872 printf("%+"PRI64d" ", n);
873 printf("| nTimeOffset = %+"PRI64d" (%+"PRI64d" minutes)\n", nTimeOffset, nTimeOffset/60);
874 }
875}
876
877
878
879
880
881
882
883
884
885string FormatVersion(int nVersion)
886{
887 if (nVersion%100 == 0)
888 return strprintf("%d.%d.%d", nVersion/1000000, (nVersion/10000)%100, (nVersion/100)%100);
889 else
890 return strprintf("%d.%d.%d.%d", nVersion/1000000, (nVersion/10000)%100, (nVersion/100)%100, nVersion%100);
891}
892
893string FormatFullVersion()
894{
895 string s = FormatVersion(VERSION);
896 return s;
897}
898
899std::string FormatSubVersion(const std::string& name, int nClientVersion)
900{
901 std::ostringstream ss;
902 ss << "/";
903 ss << name << ":" << FormatVersion(nClientVersion);
904 ss << "/";
905 return ss.str();
906}
907
908
909
910#ifdef DEBUG_LOCKORDER
911//
912// Early deadlock detection.
913// Problem being solved:
914// Thread 1 locks A, then B, then C
915// Thread 2 locks D, then C, then A
916// --> may result in deadlock between the two threads, depending on when they run.
917// Solution implemented here:
918// Keep track of pairs of locks: (A before B), (A before C), etc.
919// Complain if any thread trys to lock in a different order.
920//
921
922struct CLockLocation
923{
924 CLockLocation(const char* pszName, const char* pszFile, int nLine)
925 {
926 mutexName = pszName;
927 sourceFile = pszFile;
928 sourceLine = nLine;
929 }
930
931 std::string ToString() const
932 {
933 return mutexName+" "+sourceFile+":"+itostr(sourceLine);
934 }
935
936private:
937 std::string mutexName;
938 std::string sourceFile;
939 int sourceLine;
940};
941
942typedef std::vector< std::pair<CCriticalSection*, CLockLocation> > LockStack;
943
944static boost::interprocess::interprocess_mutex dd_mutex;
945static std::map<std::pair<CCriticalSection*, CCriticalSection*>, LockStack> lockorders;
946static boost::thread_specific_ptr<LockStack> lockstack;
947
948
949static void potential_deadlock_detected(const std::pair<CCriticalSection*, CCriticalSection*>& mismatch, const LockStack& s1, const LockStack& s2)
950{
951 printf("POTENTIAL DEADLOCK DETECTED\n");
952 printf("Previous lock order was:\n");
953 BOOST_FOREACH(const PAIRTYPE(CCriticalSection*, CLockLocation)& i, s2)
954 {
955 if (i.first == mismatch.first) printf(" (1)");
956 if (i.first == mismatch.second) printf(" (2)");
957 printf(" %s\n", i.second.ToString().c_str());
958 }
959 printf("Current lock order is:\n");
960 BOOST_FOREACH(const PAIRTYPE(CCriticalSection*, CLockLocation)& i, s1)
961 {
962 if (i.first == mismatch.first) printf(" (1)");
963 if (i.first == mismatch.second) printf(" (2)");
964 printf(" %s\n", i.second.ToString().c_str());
965 }
966}
967
968static void push_lock(CCriticalSection* c, const CLockLocation& locklocation)
969{
970 bool fOrderOK = true;
971 if (lockstack.get() == NULL)
972 lockstack.reset(new LockStack);
973
974 if (fDebug) printf("Locking: %s\n", locklocation.ToString().c_str());
975 dd_mutex.lock();
976
977 (*lockstack).push_back(std::make_pair(c, locklocation));
978
979 BOOST_FOREACH(const PAIRTYPE(CCriticalSection*, CLockLocation)& i, (*lockstack))
980 {
981 if (i.first == c) break;
982
983 std::pair<CCriticalSection*, CCriticalSection*> p1 = std::make_pair(i.first, c);
984 if (lockorders.count(p1))
985 continue;
986 lockorders[p1] = (*lockstack);
987
988 std::pair<CCriticalSection*, CCriticalSection*> p2 = std::make_pair(c, i.first);
989 if (lockorders.count(p2))
990 {
991 potential_deadlock_detected(p1, lockorders[p2], lockorders[p1]);
992 break;
993 }
994 }
995 dd_mutex.unlock();
996}
997
998static void pop_lock()
999{
1000 if (fDebug)
1001 {
1002 const CLockLocation& locklocation = (*lockstack).rbegin()->second;
1003 printf("Unlocked: %s\n", locklocation.ToString().c_str());
1004 }
1005 dd_mutex.lock();
1006 (*lockstack).pop_back();
1007 dd_mutex.unlock();
1008}
1009
1010void CCriticalSection::Enter(const char* pszName, const char* pszFile, int nLine)
1011{
1012 push_lock(this, CLockLocation(pszName, pszFile, nLine));
1013 mutex.lock();
1014}
1015void CCriticalSection::Leave()
1016{
1017 mutex.unlock();
1018 pop_lock();
1019}
1020bool CCriticalSection::TryEnter(const char* pszName, const char* pszFile, int nLine)
1021{
1022 push_lock(this, CLockLocation(pszName, pszFile, nLine));
1023 bool result = mutex.try_lock();
1024 if (!result) pop_lock();
1025 return result;
1026}
1027
1028#else
1029
1030void CCriticalSection::Enter(const char*, const char*, int)
1031{
1032 mutex.lock();
1033}
1034
1035void CCriticalSection::Leave()
1036{
1037 mutex.unlock();
1038}
1039
1040bool CCriticalSection::TryEnter(const char*, const char*, int)
1041{
1042 bool result = mutex.try_lock();
1043 return result;
1044}
1045
1046#endif /* DEBUG_LOCKORDER */