Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // Platform-specific code for Win32. |
| 6 | |
| 7 | // Secure API functions are not available using MinGW with msvcrt.dll |
| 8 | // on Windows XP. Make sure MINGW_HAS_SECURE_API is not defined to |
| 9 | // disable definition of secure API functions in standard headers that |
| 10 | // would conflict with our own implementation. |
| 11 | #ifdef __MINGW32__ |
| 12 | #include <_mingw.h> |
| 13 | #ifdef MINGW_HAS_SECURE_API |
| 14 | #undef MINGW_HAS_SECURE_API |
| 15 | #endif // MINGW_HAS_SECURE_API |
| 16 | #endif // __MINGW32__ |
| 17 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 18 | #include <limits> |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 19 | |
| 20 | #include "src/base/win32-headers.h" |
| 21 | |
| 22 | #include "src/base/bits.h" |
| 23 | #include "src/base/lazy-instance.h" |
| 24 | #include "src/base/macros.h" |
| 25 | #include "src/base/platform/platform.h" |
| 26 | #include "src/base/platform/time.h" |
| 27 | #include "src/base/utils/random-number-generator.h" |
| 28 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 29 | |
| 30 | // Extra functions for MinGW. Most of these are the _s functions which are in |
| 31 | // the Microsoft Visual Studio C++ CRT. |
| 32 | #ifdef __MINGW32__ |
| 33 | |
| 34 | |
| 35 | #ifndef __MINGW64_VERSION_MAJOR |
| 36 | |
| 37 | #define _TRUNCATE 0 |
| 38 | #define STRUNCATE 80 |
| 39 | |
| 40 | inline void MemoryBarrier() { |
| 41 | int barrier = 0; |
| 42 | __asm__ __volatile__("xchgl %%eax,%0 ":"=r" (barrier)); |
| 43 | } |
| 44 | |
| 45 | #endif // __MINGW64_VERSION_MAJOR |
| 46 | |
| 47 | |
| 48 | int localtime_s(tm* out_tm, const time_t* time) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 49 | tm* posix_local_time_struct = localtime(time); // NOLINT |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 50 | if (posix_local_time_struct == NULL) return 1; |
| 51 | *out_tm = *posix_local_time_struct; |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | |
| 56 | int fopen_s(FILE** pFile, const char* filename, const char* mode) { |
| 57 | *pFile = fopen(filename, mode); |
| 58 | return *pFile != NULL ? 0 : 1; |
| 59 | } |
| 60 | |
| 61 | int _vsnprintf_s(char* buffer, size_t sizeOfBuffer, size_t count, |
| 62 | const char* format, va_list argptr) { |
| 63 | DCHECK(count == _TRUNCATE); |
| 64 | return _vsnprintf(buffer, sizeOfBuffer, format, argptr); |
| 65 | } |
| 66 | |
| 67 | |
| 68 | int strncpy_s(char* dest, size_t dest_size, const char* source, size_t count) { |
| 69 | CHECK(source != NULL); |
| 70 | CHECK(dest != NULL); |
| 71 | CHECK_GT(dest_size, 0); |
| 72 | |
| 73 | if (count == _TRUNCATE) { |
| 74 | while (dest_size > 0 && *source != 0) { |
| 75 | *(dest++) = *(source++); |
| 76 | --dest_size; |
| 77 | } |
| 78 | if (dest_size == 0) { |
| 79 | *(dest - 1) = 0; |
| 80 | return STRUNCATE; |
| 81 | } |
| 82 | } else { |
| 83 | while (dest_size > 0 && count > 0 && *source != 0) { |
| 84 | *(dest++) = *(source++); |
| 85 | --dest_size; |
| 86 | --count; |
| 87 | } |
| 88 | } |
| 89 | CHECK_GT(dest_size, 0); |
| 90 | *dest = 0; |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | #endif // __MINGW32__ |
| 95 | |
| 96 | namespace v8 { |
| 97 | namespace base { |
| 98 | |
| 99 | namespace { |
| 100 | |
| 101 | bool g_hard_abort = false; |
| 102 | |
| 103 | } // namespace |
| 104 | |
| 105 | class TimezoneCache { |
| 106 | public: |
| 107 | TimezoneCache() : initialized_(false) { } |
| 108 | |
| 109 | void Clear() { |
| 110 | initialized_ = false; |
| 111 | } |
| 112 | |
| 113 | // Initialize timezone information. The timezone information is obtained from |
| 114 | // windows. If we cannot get the timezone information we fall back to CET. |
| 115 | void InitializeIfNeeded() { |
| 116 | // Just return if timezone information has already been initialized. |
| 117 | if (initialized_) return; |
| 118 | |
| 119 | // Initialize POSIX time zone data. |
| 120 | _tzset(); |
| 121 | // Obtain timezone information from operating system. |
| 122 | memset(&tzinfo_, 0, sizeof(tzinfo_)); |
| 123 | if (GetTimeZoneInformation(&tzinfo_) == TIME_ZONE_ID_INVALID) { |
| 124 | // If we cannot get timezone information we fall back to CET. |
| 125 | tzinfo_.Bias = -60; |
| 126 | tzinfo_.StandardDate.wMonth = 10; |
| 127 | tzinfo_.StandardDate.wDay = 5; |
| 128 | tzinfo_.StandardDate.wHour = 3; |
| 129 | tzinfo_.StandardBias = 0; |
| 130 | tzinfo_.DaylightDate.wMonth = 3; |
| 131 | tzinfo_.DaylightDate.wDay = 5; |
| 132 | tzinfo_.DaylightDate.wHour = 2; |
| 133 | tzinfo_.DaylightBias = -60; |
| 134 | } |
| 135 | |
| 136 | // Make standard and DST timezone names. |
| 137 | WideCharToMultiByte(CP_UTF8, 0, tzinfo_.StandardName, -1, |
| 138 | std_tz_name_, kTzNameSize, NULL, NULL); |
| 139 | std_tz_name_[kTzNameSize - 1] = '\0'; |
| 140 | WideCharToMultiByte(CP_UTF8, 0, tzinfo_.DaylightName, -1, |
| 141 | dst_tz_name_, kTzNameSize, NULL, NULL); |
| 142 | dst_tz_name_[kTzNameSize - 1] = '\0'; |
| 143 | |
| 144 | // If OS returned empty string or resource id (like "@tzres.dll,-211") |
| 145 | // simply guess the name from the UTC bias of the timezone. |
| 146 | // To properly resolve the resource identifier requires a library load, |
| 147 | // which is not possible in a sandbox. |
| 148 | if (std_tz_name_[0] == '\0' || std_tz_name_[0] == '@') { |
| 149 | OS::SNPrintF(std_tz_name_, kTzNameSize - 1, |
| 150 | "%s Standard Time", |
| 151 | GuessTimezoneNameFromBias(tzinfo_.Bias)); |
| 152 | } |
| 153 | if (dst_tz_name_[0] == '\0' || dst_tz_name_[0] == '@') { |
| 154 | OS::SNPrintF(dst_tz_name_, kTzNameSize - 1, |
| 155 | "%s Daylight Time", |
| 156 | GuessTimezoneNameFromBias(tzinfo_.Bias)); |
| 157 | } |
| 158 | // Timezone information initialized. |
| 159 | initialized_ = true; |
| 160 | } |
| 161 | |
| 162 | // Guess the name of the timezone from the bias. |
| 163 | // The guess is very biased towards the northern hemisphere. |
| 164 | const char* GuessTimezoneNameFromBias(int bias) { |
| 165 | static const int kHour = 60; |
| 166 | switch (-bias) { |
| 167 | case -9*kHour: return "Alaska"; |
| 168 | case -8*kHour: return "Pacific"; |
| 169 | case -7*kHour: return "Mountain"; |
| 170 | case -6*kHour: return "Central"; |
| 171 | case -5*kHour: return "Eastern"; |
| 172 | case -4*kHour: return "Atlantic"; |
| 173 | case 0*kHour: return "GMT"; |
| 174 | case +1*kHour: return "Central Europe"; |
| 175 | case +2*kHour: return "Eastern Europe"; |
| 176 | case +3*kHour: return "Russia"; |
| 177 | case +5*kHour + 30: return "India"; |
| 178 | case +8*kHour: return "China"; |
| 179 | case +9*kHour: return "Japan"; |
| 180 | case +12*kHour: return "New Zealand"; |
| 181 | default: return "Local"; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | |
| 186 | private: |
| 187 | static const int kTzNameSize = 128; |
| 188 | bool initialized_; |
| 189 | char std_tz_name_[kTzNameSize]; |
| 190 | char dst_tz_name_[kTzNameSize]; |
| 191 | TIME_ZONE_INFORMATION tzinfo_; |
| 192 | friend class Win32Time; |
| 193 | }; |
| 194 | |
| 195 | |
| 196 | // ---------------------------------------------------------------------------- |
| 197 | // The Time class represents time on win32. A timestamp is represented as |
| 198 | // a 64-bit integer in 100 nanoseconds since January 1, 1601 (UTC). JavaScript |
| 199 | // timestamps are represented as a doubles in milliseconds since 00:00:00 UTC, |
| 200 | // January 1, 1970. |
| 201 | |
| 202 | class Win32Time { |
| 203 | public: |
| 204 | // Constructors. |
| 205 | Win32Time(); |
| 206 | explicit Win32Time(double jstime); |
| 207 | Win32Time(int year, int mon, int day, int hour, int min, int sec); |
| 208 | |
| 209 | // Convert timestamp to JavaScript representation. |
| 210 | double ToJSTime(); |
| 211 | |
| 212 | // Set timestamp to current time. |
| 213 | void SetToCurrentTime(); |
| 214 | |
| 215 | // Returns the local timezone offset in milliseconds east of UTC. This is |
| 216 | // the number of milliseconds you must add to UTC to get local time, i.e. |
| 217 | // LocalOffset(CET) = 3600000 and LocalOffset(PST) = -28800000. This |
| 218 | // routine also takes into account whether daylight saving is effect |
| 219 | // at the time. |
| 220 | int64_t LocalOffset(TimezoneCache* cache); |
| 221 | |
| 222 | // Returns the daylight savings time offset for the time in milliseconds. |
| 223 | int64_t DaylightSavingsOffset(TimezoneCache* cache); |
| 224 | |
| 225 | // Returns a string identifying the current timezone for the |
| 226 | // timestamp taking into account daylight saving. |
| 227 | char* LocalTimezone(TimezoneCache* cache); |
| 228 | |
| 229 | private: |
| 230 | // Constants for time conversion. |
| 231 | static const int64_t kTimeEpoc = 116444736000000000LL; |
| 232 | static const int64_t kTimeScaler = 10000; |
| 233 | static const int64_t kMsPerMinute = 60000; |
| 234 | |
| 235 | // Constants for timezone information. |
| 236 | static const bool kShortTzNames = false; |
| 237 | |
| 238 | // Return whether or not daylight savings time is in effect at this time. |
| 239 | bool InDST(TimezoneCache* cache); |
| 240 | |
| 241 | // Accessor for FILETIME representation. |
| 242 | FILETIME& ft() { return time_.ft_; } |
| 243 | |
| 244 | // Accessor for integer representation. |
| 245 | int64_t& t() { return time_.t_; } |
| 246 | |
| 247 | // Although win32 uses 64-bit integers for representing timestamps, |
| 248 | // these are packed into a FILETIME structure. The FILETIME structure |
| 249 | // is just a struct representing a 64-bit integer. The TimeStamp union |
| 250 | // allows access to both a FILETIME and an integer representation of |
| 251 | // the timestamp. |
| 252 | union TimeStamp { |
| 253 | FILETIME ft_; |
| 254 | int64_t t_; |
| 255 | }; |
| 256 | |
| 257 | TimeStamp time_; |
| 258 | }; |
| 259 | |
| 260 | |
| 261 | // Initialize timestamp to start of epoc. |
| 262 | Win32Time::Win32Time() { |
| 263 | t() = 0; |
| 264 | } |
| 265 | |
| 266 | |
| 267 | // Initialize timestamp from a JavaScript timestamp. |
| 268 | Win32Time::Win32Time(double jstime) { |
| 269 | t() = static_cast<int64_t>(jstime) * kTimeScaler + kTimeEpoc; |
| 270 | } |
| 271 | |
| 272 | |
| 273 | // Initialize timestamp from date/time components. |
| 274 | Win32Time::Win32Time(int year, int mon, int day, int hour, int min, int sec) { |
| 275 | SYSTEMTIME st; |
| 276 | st.wYear = year; |
| 277 | st.wMonth = mon; |
| 278 | st.wDay = day; |
| 279 | st.wHour = hour; |
| 280 | st.wMinute = min; |
| 281 | st.wSecond = sec; |
| 282 | st.wMilliseconds = 0; |
| 283 | SystemTimeToFileTime(&st, &ft()); |
| 284 | } |
| 285 | |
| 286 | |
| 287 | // Convert timestamp to JavaScript timestamp. |
| 288 | double Win32Time::ToJSTime() { |
| 289 | return static_cast<double>((t() - kTimeEpoc) / kTimeScaler); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | // Set timestamp to current time. |
| 294 | void Win32Time::SetToCurrentTime() { |
| 295 | // The default GetSystemTimeAsFileTime has a ~15.5ms resolution. |
| 296 | // Because we're fast, we like fast timers which have at least a |
| 297 | // 1ms resolution. |
| 298 | // |
| 299 | // timeGetTime() provides 1ms granularity when combined with |
| 300 | // timeBeginPeriod(). If the host application for v8 wants fast |
| 301 | // timers, it can use timeBeginPeriod to increase the resolution. |
| 302 | // |
| 303 | // Using timeGetTime() has a drawback because it is a 32bit value |
| 304 | // and hence rolls-over every ~49days. |
| 305 | // |
| 306 | // To use the clock, we use GetSystemTimeAsFileTime as our base; |
| 307 | // and then use timeGetTime to extrapolate current time from the |
| 308 | // start time. To deal with rollovers, we resync the clock |
| 309 | // any time when more than kMaxClockElapsedTime has passed or |
| 310 | // whenever timeGetTime creates a rollover. |
| 311 | |
| 312 | static bool initialized = false; |
| 313 | static TimeStamp init_time; |
| 314 | static DWORD init_ticks; |
| 315 | static const int64_t kHundredNanosecondsPerSecond = 10000000; |
| 316 | static const int64_t kMaxClockElapsedTime = |
| 317 | 60*kHundredNanosecondsPerSecond; // 1 minute |
| 318 | |
| 319 | // If we are uninitialized, we need to resync the clock. |
| 320 | bool needs_resync = !initialized; |
| 321 | |
| 322 | // Get the current time. |
| 323 | TimeStamp time_now; |
| 324 | GetSystemTimeAsFileTime(&time_now.ft_); |
| 325 | DWORD ticks_now = timeGetTime(); |
| 326 | |
| 327 | // Check if we need to resync due to clock rollover. |
| 328 | needs_resync |= ticks_now < init_ticks; |
| 329 | |
| 330 | // Check if we need to resync due to elapsed time. |
| 331 | needs_resync |= (time_now.t_ - init_time.t_) > kMaxClockElapsedTime; |
| 332 | |
| 333 | // Check if we need to resync due to backwards time change. |
| 334 | needs_resync |= time_now.t_ < init_time.t_; |
| 335 | |
| 336 | // Resync the clock if necessary. |
| 337 | if (needs_resync) { |
| 338 | GetSystemTimeAsFileTime(&init_time.ft_); |
| 339 | init_ticks = ticks_now = timeGetTime(); |
| 340 | initialized = true; |
| 341 | } |
| 342 | |
| 343 | // Finally, compute the actual time. Why is this so hard. |
| 344 | DWORD elapsed = ticks_now - init_ticks; |
| 345 | this->time_.t_ = init_time.t_ + (static_cast<int64_t>(elapsed) * 10000); |
| 346 | } |
| 347 | |
| 348 | |
| 349 | // Return the local timezone offset in milliseconds east of UTC. This |
| 350 | // takes into account whether daylight saving is in effect at the time. |
| 351 | // Only times in the 32-bit Unix range may be passed to this function. |
| 352 | // Also, adding the time-zone offset to the input must not overflow. |
| 353 | // The function EquivalentTime() in date.js guarantees this. |
| 354 | int64_t Win32Time::LocalOffset(TimezoneCache* cache) { |
| 355 | cache->InitializeIfNeeded(); |
| 356 | |
| 357 | Win32Time rounded_to_second(*this); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 358 | rounded_to_second.t() = |
| 359 | rounded_to_second.t() / 1000 / kTimeScaler * 1000 * kTimeScaler; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 360 | // Convert to local time using POSIX localtime function. |
| 361 | // Windows XP Service Pack 3 made SystemTimeToTzSpecificLocalTime() |
| 362 | // very slow. Other browsers use localtime(). |
| 363 | |
| 364 | // Convert from JavaScript milliseconds past 1/1/1970 0:00:00 to |
| 365 | // POSIX seconds past 1/1/1970 0:00:00. |
| 366 | double unchecked_posix_time = rounded_to_second.ToJSTime() / 1000; |
| 367 | if (unchecked_posix_time > INT_MAX || unchecked_posix_time < 0) { |
| 368 | return 0; |
| 369 | } |
| 370 | // Because _USE_32BIT_TIME_T is defined, time_t is a 32-bit int. |
| 371 | time_t posix_time = static_cast<time_t>(unchecked_posix_time); |
| 372 | |
| 373 | // Convert to local time, as struct with fields for day, hour, year, etc. |
| 374 | tm posix_local_time_struct; |
| 375 | if (localtime_s(&posix_local_time_struct, &posix_time)) return 0; |
| 376 | |
| 377 | if (posix_local_time_struct.tm_isdst > 0) { |
| 378 | return (cache->tzinfo_.Bias + cache->tzinfo_.DaylightBias) * -kMsPerMinute; |
| 379 | } else if (posix_local_time_struct.tm_isdst == 0) { |
| 380 | return (cache->tzinfo_.Bias + cache->tzinfo_.StandardBias) * -kMsPerMinute; |
| 381 | } else { |
| 382 | return cache->tzinfo_.Bias * -kMsPerMinute; |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | |
| 387 | // Return whether or not daylight savings time is in effect at this time. |
| 388 | bool Win32Time::InDST(TimezoneCache* cache) { |
| 389 | cache->InitializeIfNeeded(); |
| 390 | |
| 391 | // Determine if DST is in effect at the specified time. |
| 392 | bool in_dst = false; |
| 393 | if (cache->tzinfo_.StandardDate.wMonth != 0 || |
| 394 | cache->tzinfo_.DaylightDate.wMonth != 0) { |
| 395 | // Get the local timezone offset for the timestamp in milliseconds. |
| 396 | int64_t offset = LocalOffset(cache); |
| 397 | |
| 398 | // Compute the offset for DST. The bias parameters in the timezone info |
| 399 | // are specified in minutes. These must be converted to milliseconds. |
| 400 | int64_t dstofs = |
| 401 | -(cache->tzinfo_.Bias + cache->tzinfo_.DaylightBias) * kMsPerMinute; |
| 402 | |
| 403 | // If the local time offset equals the timezone bias plus the daylight |
| 404 | // bias then DST is in effect. |
| 405 | in_dst = offset == dstofs; |
| 406 | } |
| 407 | |
| 408 | return in_dst; |
| 409 | } |
| 410 | |
| 411 | |
| 412 | // Return the daylight savings time offset for this time. |
| 413 | int64_t Win32Time::DaylightSavingsOffset(TimezoneCache* cache) { |
| 414 | return InDST(cache) ? 60 * kMsPerMinute : 0; |
| 415 | } |
| 416 | |
| 417 | |
| 418 | // Returns a string identifying the current timezone for the |
| 419 | // timestamp taking into account daylight saving. |
| 420 | char* Win32Time::LocalTimezone(TimezoneCache* cache) { |
| 421 | // Return the standard or DST time zone name based on whether daylight |
| 422 | // saving is in effect at the given time. |
| 423 | return InDST(cache) ? cache->dst_tz_name_ : cache->std_tz_name_; |
| 424 | } |
| 425 | |
| 426 | |
| 427 | // Returns the accumulated user time for thread. |
| 428 | int OS::GetUserTime(uint32_t* secs, uint32_t* usecs) { |
| 429 | FILETIME dummy; |
| 430 | uint64_t usertime; |
| 431 | |
| 432 | // Get the amount of time that the thread has executed in user mode. |
| 433 | if (!GetThreadTimes(GetCurrentThread(), &dummy, &dummy, &dummy, |
| 434 | reinterpret_cast<FILETIME*>(&usertime))) return -1; |
| 435 | |
| 436 | // Adjust the resolution to micro-seconds. |
| 437 | usertime /= 10; |
| 438 | |
| 439 | // Convert to seconds and microseconds |
| 440 | *secs = static_cast<uint32_t>(usertime / 1000000); |
| 441 | *usecs = static_cast<uint32_t>(usertime % 1000000); |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | // Returns current time as the number of milliseconds since |
| 447 | // 00:00:00 UTC, January 1, 1970. |
| 448 | double OS::TimeCurrentMillis() { |
| 449 | return Time::Now().ToJsTime(); |
| 450 | } |
| 451 | |
| 452 | |
| 453 | TimezoneCache* OS::CreateTimezoneCache() { |
| 454 | return new TimezoneCache(); |
| 455 | } |
| 456 | |
| 457 | |
| 458 | void OS::DisposeTimezoneCache(TimezoneCache* cache) { |
| 459 | delete cache; |
| 460 | } |
| 461 | |
| 462 | |
| 463 | void OS::ClearTimezoneCache(TimezoneCache* cache) { |
| 464 | cache->Clear(); |
| 465 | } |
| 466 | |
| 467 | |
| 468 | // Returns a string identifying the current timezone taking into |
| 469 | // account daylight saving. |
| 470 | const char* OS::LocalTimezone(double time, TimezoneCache* cache) { |
| 471 | return Win32Time(time).LocalTimezone(cache); |
| 472 | } |
| 473 | |
| 474 | |
| 475 | // Returns the local time offset in milliseconds east of UTC without |
| 476 | // taking daylight savings time into account. |
| 477 | double OS::LocalTimeOffset(TimezoneCache* cache) { |
| 478 | // Use current time, rounded to the millisecond. |
| 479 | Win32Time t(TimeCurrentMillis()); |
| 480 | // Time::LocalOffset inlcudes any daylight savings offset, so subtract it. |
| 481 | return static_cast<double>(t.LocalOffset(cache) - |
| 482 | t.DaylightSavingsOffset(cache)); |
| 483 | } |
| 484 | |
| 485 | |
| 486 | // Returns the daylight savings offset in milliseconds for the given |
| 487 | // time. |
| 488 | double OS::DaylightSavingsOffset(double time, TimezoneCache* cache) { |
| 489 | int64_t offset = Win32Time(time).DaylightSavingsOffset(cache); |
| 490 | return static_cast<double>(offset); |
| 491 | } |
| 492 | |
| 493 | |
| 494 | int OS::GetLastError() { |
| 495 | return ::GetLastError(); |
| 496 | } |
| 497 | |
| 498 | |
| 499 | int OS::GetCurrentProcessId() { |
| 500 | return static_cast<int>(::GetCurrentProcessId()); |
| 501 | } |
| 502 | |
| 503 | |
| 504 | int OS::GetCurrentThreadId() { |
| 505 | return static_cast<int>(::GetCurrentThreadId()); |
| 506 | } |
| 507 | |
| 508 | |
| 509 | // ---------------------------------------------------------------------------- |
| 510 | // Win32 console output. |
| 511 | // |
| 512 | // If a Win32 application is linked as a console application it has a normal |
| 513 | // standard output and standard error. In this case normal printf works fine |
| 514 | // for output. However, if the application is linked as a GUI application, |
| 515 | // the process doesn't have a console, and therefore (debugging) output is lost. |
| 516 | // This is the case if we are embedded in a windows program (like a browser). |
| 517 | // In order to be able to get debug output in this case the the debugging |
| 518 | // facility using OutputDebugString. This output goes to the active debugger |
| 519 | // for the process (if any). Else the output can be monitored using DBMON.EXE. |
| 520 | |
| 521 | enum OutputMode { |
| 522 | UNKNOWN, // Output method has not yet been determined. |
| 523 | CONSOLE, // Output is written to stdout. |
| 524 | ODS // Output is written to debug facility. |
| 525 | }; |
| 526 | |
| 527 | static OutputMode output_mode = UNKNOWN; // Current output mode. |
| 528 | |
| 529 | |
| 530 | // Determine if the process has a console for output. |
| 531 | static bool HasConsole() { |
| 532 | // Only check the first time. Eventual race conditions are not a problem, |
| 533 | // because all threads will eventually determine the same mode. |
| 534 | if (output_mode == UNKNOWN) { |
| 535 | // We cannot just check that the standard output is attached to a console |
| 536 | // because this would fail if output is redirected to a file. Therefore we |
| 537 | // say that a process does not have an output console if either the |
| 538 | // standard output handle is invalid or its file type is unknown. |
| 539 | if (GetStdHandle(STD_OUTPUT_HANDLE) != INVALID_HANDLE_VALUE && |
| 540 | GetFileType(GetStdHandle(STD_OUTPUT_HANDLE)) != FILE_TYPE_UNKNOWN) |
| 541 | output_mode = CONSOLE; |
| 542 | else |
| 543 | output_mode = ODS; |
| 544 | } |
| 545 | return output_mode == CONSOLE; |
| 546 | } |
| 547 | |
| 548 | |
| 549 | static void VPrintHelper(FILE* stream, const char* format, va_list args) { |
| 550 | if ((stream == stdout || stream == stderr) && !HasConsole()) { |
| 551 | // It is important to use safe print here in order to avoid |
| 552 | // overflowing the buffer. We might truncate the output, but this |
| 553 | // does not crash. |
| 554 | char buffer[4096]; |
| 555 | OS::VSNPrintF(buffer, sizeof(buffer), format, args); |
| 556 | OutputDebugStringA(buffer); |
| 557 | } else { |
| 558 | vfprintf(stream, format, args); |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | |
| 563 | FILE* OS::FOpen(const char* path, const char* mode) { |
| 564 | FILE* result; |
| 565 | if (fopen_s(&result, path, mode) == 0) { |
| 566 | return result; |
| 567 | } else { |
| 568 | return NULL; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | |
| 573 | bool OS::Remove(const char* path) { |
| 574 | return (DeleteFileA(path) != 0); |
| 575 | } |
| 576 | |
| 577 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 578 | bool OS::isDirectorySeparator(const char ch) { |
| 579 | return ch == '/' || ch == '\\'; |
| 580 | } |
| 581 | |
| 582 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 583 | FILE* OS::OpenTemporaryFile() { |
| 584 | // tmpfile_s tries to use the root dir, don't use it. |
| 585 | char tempPathBuffer[MAX_PATH]; |
| 586 | DWORD path_result = 0; |
| 587 | path_result = GetTempPathA(MAX_PATH, tempPathBuffer); |
| 588 | if (path_result > MAX_PATH || path_result == 0) return NULL; |
| 589 | UINT name_result = 0; |
| 590 | char tempNameBuffer[MAX_PATH]; |
| 591 | name_result = GetTempFileNameA(tempPathBuffer, "", 0, tempNameBuffer); |
| 592 | if (name_result == 0) return NULL; |
| 593 | FILE* result = FOpen(tempNameBuffer, "w+"); // Same mode as tmpfile uses. |
| 594 | if (result != NULL) { |
| 595 | Remove(tempNameBuffer); // Delete on close. |
| 596 | } |
| 597 | return result; |
| 598 | } |
| 599 | |
| 600 | |
| 601 | // Open log file in binary mode to avoid /n -> /r/n conversion. |
| 602 | const char* const OS::LogFileOpenMode = "wb"; |
| 603 | |
| 604 | |
| 605 | // Print (debug) message to console. |
| 606 | void OS::Print(const char* format, ...) { |
| 607 | va_list args; |
| 608 | va_start(args, format); |
| 609 | VPrint(format, args); |
| 610 | va_end(args); |
| 611 | } |
| 612 | |
| 613 | |
| 614 | void OS::VPrint(const char* format, va_list args) { |
| 615 | VPrintHelper(stdout, format, args); |
| 616 | } |
| 617 | |
| 618 | |
| 619 | void OS::FPrint(FILE* out, const char* format, ...) { |
| 620 | va_list args; |
| 621 | va_start(args, format); |
| 622 | VFPrint(out, format, args); |
| 623 | va_end(args); |
| 624 | } |
| 625 | |
| 626 | |
| 627 | void OS::VFPrint(FILE* out, const char* format, va_list args) { |
| 628 | VPrintHelper(out, format, args); |
| 629 | } |
| 630 | |
| 631 | |
| 632 | // Print error message to console. |
| 633 | void OS::PrintError(const char* format, ...) { |
| 634 | va_list args; |
| 635 | va_start(args, format); |
| 636 | VPrintError(format, args); |
| 637 | va_end(args); |
| 638 | } |
| 639 | |
| 640 | |
| 641 | void OS::VPrintError(const char* format, va_list args) { |
| 642 | VPrintHelper(stderr, format, args); |
| 643 | } |
| 644 | |
| 645 | |
| 646 | int OS::SNPrintF(char* str, int length, const char* format, ...) { |
| 647 | va_list args; |
| 648 | va_start(args, format); |
| 649 | int result = VSNPrintF(str, length, format, args); |
| 650 | va_end(args); |
| 651 | return result; |
| 652 | } |
| 653 | |
| 654 | |
| 655 | int OS::VSNPrintF(char* str, int length, const char* format, va_list args) { |
| 656 | int n = _vsnprintf_s(str, length, _TRUNCATE, format, args); |
| 657 | // Make sure to zero-terminate the string if the output was |
| 658 | // truncated or if there was an error. |
| 659 | if (n < 0 || n >= length) { |
| 660 | if (length > 0) |
| 661 | str[length - 1] = '\0'; |
| 662 | return -1; |
| 663 | } else { |
| 664 | return n; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | |
| 669 | char* OS::StrChr(char* str, int c) { |
| 670 | return const_cast<char*>(strchr(str, c)); |
| 671 | } |
| 672 | |
| 673 | |
| 674 | void OS::StrNCpy(char* dest, int length, const char* src, size_t n) { |
| 675 | // Use _TRUNCATE or strncpy_s crashes (by design) if buffer is too small. |
| 676 | size_t buffer_size = static_cast<size_t>(length); |
| 677 | if (n + 1 > buffer_size) // count for trailing '\0' |
| 678 | n = _TRUNCATE; |
| 679 | int result = strncpy_s(dest, length, src, n); |
| 680 | USE(result); |
| 681 | DCHECK(result == 0 || (n == _TRUNCATE && result == STRUNCATE)); |
| 682 | } |
| 683 | |
| 684 | |
| 685 | #undef _TRUNCATE |
| 686 | #undef STRUNCATE |
| 687 | |
| 688 | |
| 689 | // Get the system's page size used by VirtualAlloc() or the next power |
| 690 | // of two. The reason for always returning a power of two is that the |
| 691 | // rounding up in OS::Allocate expects that. |
| 692 | static size_t GetPageSize() { |
| 693 | static size_t page_size = 0; |
| 694 | if (page_size == 0) { |
| 695 | SYSTEM_INFO info; |
| 696 | GetSystemInfo(&info); |
| 697 | page_size = base::bits::RoundUpToPowerOfTwo32(info.dwPageSize); |
| 698 | } |
| 699 | return page_size; |
| 700 | } |
| 701 | |
| 702 | |
| 703 | // The allocation alignment is the guaranteed alignment for |
| 704 | // VirtualAlloc'ed blocks of memory. |
| 705 | size_t OS::AllocateAlignment() { |
| 706 | static size_t allocate_alignment = 0; |
| 707 | if (allocate_alignment == 0) { |
| 708 | SYSTEM_INFO info; |
| 709 | GetSystemInfo(&info); |
| 710 | allocate_alignment = info.dwAllocationGranularity; |
| 711 | } |
| 712 | return allocate_alignment; |
| 713 | } |
| 714 | |
| 715 | |
| 716 | static LazyInstance<RandomNumberGenerator>::type |
| 717 | platform_random_number_generator = LAZY_INSTANCE_INITIALIZER; |
| 718 | |
| 719 | |
| 720 | void OS::Initialize(int64_t random_seed, bool hard_abort, |
| 721 | const char* const gc_fake_mmap) { |
| 722 | if (random_seed) { |
| 723 | platform_random_number_generator.Pointer()->SetSeed(random_seed); |
| 724 | } |
| 725 | g_hard_abort = hard_abort; |
| 726 | } |
| 727 | |
| 728 | |
| 729 | void* OS::GetRandomMmapAddr() { |
| 730 | // The address range used to randomize RWX allocations in OS::Allocate |
| 731 | // Try not to map pages into the default range that windows loads DLLs |
| 732 | // Use a multiple of 64k to prevent committing unused memory. |
| 733 | // Note: This does not guarantee RWX regions will be within the |
| 734 | // range kAllocationRandomAddressMin to kAllocationRandomAddressMax |
| 735 | #ifdef V8_HOST_ARCH_64_BIT |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 736 | static const uintptr_t kAllocationRandomAddressMin = 0x0000000080000000; |
| 737 | static const uintptr_t kAllocationRandomAddressMax = 0x000003FFFFFF0000; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 738 | #else |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 739 | static const uintptr_t kAllocationRandomAddressMin = 0x04000000; |
| 740 | static const uintptr_t kAllocationRandomAddressMax = 0x3FFF0000; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 741 | #endif |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 742 | uintptr_t address; |
| 743 | platform_random_number_generator.Pointer()->NextBytes(&address, |
| 744 | sizeof(address)); |
| 745 | address <<= kPageSizeBits; |
| 746 | address += kAllocationRandomAddressMin; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 747 | address &= kAllocationRandomAddressMax; |
| 748 | return reinterpret_cast<void *>(address); |
| 749 | } |
| 750 | |
| 751 | |
| 752 | static void* RandomizedVirtualAlloc(size_t size, int action, int protection) { |
| 753 | LPVOID base = NULL; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 754 | static BOOL use_aslr = -1; |
| 755 | #ifdef V8_HOST_ARCH_32_BIT |
| 756 | // Don't bother randomizing on 32-bit hosts, because they lack the room and |
| 757 | // don't have viable ASLR anyway. |
| 758 | if (use_aslr == -1 && !IsWow64Process(GetCurrentProcess(), &use_aslr)) |
| 759 | use_aslr = FALSE; |
| 760 | #else |
| 761 | use_aslr = TRUE; |
| 762 | #endif |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 763 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 764 | if (use_aslr && |
| 765 | (protection == PAGE_EXECUTE_READWRITE || protection == PAGE_NOACCESS)) { |
| 766 | // For executable pages try and randomize the allocation address |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 767 | for (size_t attempts = 0; base == NULL && attempts < 3; ++attempts) { |
| 768 | base = VirtualAlloc(OS::GetRandomMmapAddr(), size, action, protection); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | // After three attempts give up and let the OS find an address to use. |
| 773 | if (base == NULL) base = VirtualAlloc(NULL, size, action, protection); |
| 774 | |
| 775 | return base; |
| 776 | } |
| 777 | |
| 778 | |
| 779 | void* OS::Allocate(const size_t requested, |
| 780 | size_t* allocated, |
| 781 | bool is_executable) { |
| 782 | // VirtualAlloc rounds allocated size to page size automatically. |
| 783 | size_t msize = RoundUp(requested, static_cast<int>(GetPageSize())); |
| 784 | |
| 785 | // Windows XP SP2 allows Data Excution Prevention (DEP). |
| 786 | int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
| 787 | |
| 788 | LPVOID mbase = RandomizedVirtualAlloc(msize, |
| 789 | MEM_COMMIT | MEM_RESERVE, |
| 790 | prot); |
| 791 | |
| 792 | if (mbase == NULL) return NULL; |
| 793 | |
| 794 | DCHECK((reinterpret_cast<uintptr_t>(mbase) % OS::AllocateAlignment()) == 0); |
| 795 | |
| 796 | *allocated = msize; |
| 797 | return mbase; |
| 798 | } |
| 799 | |
| 800 | |
| 801 | void OS::Free(void* address, const size_t size) { |
| 802 | // TODO(1240712): VirtualFree has a return value which is ignored here. |
| 803 | VirtualFree(address, 0, MEM_RELEASE); |
| 804 | USE(size); |
| 805 | } |
| 806 | |
| 807 | |
| 808 | intptr_t OS::CommitPageSize() { |
| 809 | return 4096; |
| 810 | } |
| 811 | |
| 812 | |
| 813 | void OS::ProtectCode(void* address, const size_t size) { |
| 814 | DWORD old_protect; |
| 815 | VirtualProtect(address, size, PAGE_EXECUTE_READ, &old_protect); |
| 816 | } |
| 817 | |
| 818 | |
| 819 | void OS::Guard(void* address, const size_t size) { |
| 820 | DWORD oldprotect; |
| 821 | VirtualProtect(address, size, PAGE_NOACCESS, &oldprotect); |
| 822 | } |
| 823 | |
| 824 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 825 | void OS::Sleep(TimeDelta interval) { |
| 826 | ::Sleep(static_cast<DWORD>(interval.InMilliseconds())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | |
| 830 | void OS::Abort() { |
| 831 | if (g_hard_abort) { |
| 832 | V8_IMMEDIATE_CRASH(); |
| 833 | } |
| 834 | // Make the MSVCRT do a silent abort. |
| 835 | raise(SIGABRT); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 836 | |
| 837 | // Make sure function doesn't return. |
| 838 | abort(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 839 | } |
| 840 | |
| 841 | |
| 842 | void OS::DebugBreak() { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 843 | #if V8_CC_MSVC |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 844 | // To avoid Visual Studio runtime support the following code can be used |
| 845 | // instead |
| 846 | // __asm { int 3 } |
| 847 | __debugbreak(); |
| 848 | #else |
| 849 | ::DebugBreak(); |
| 850 | #endif |
| 851 | } |
| 852 | |
| 853 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 854 | class Win32MemoryMappedFile final : public OS::MemoryMappedFile { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 855 | public: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 856 | Win32MemoryMappedFile(HANDLE file, HANDLE file_mapping, void* memory, |
| 857 | size_t size) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 858 | : file_(file), |
| 859 | file_mapping_(file_mapping), |
| 860 | memory_(memory), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 861 | size_(size) {} |
| 862 | ~Win32MemoryMappedFile() final; |
| 863 | void* memory() const final { return memory_; } |
| 864 | size_t size() const final { return size_; } |
| 865 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 866 | private: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 867 | HANDLE const file_; |
| 868 | HANDLE const file_mapping_; |
| 869 | void* const memory_; |
| 870 | size_t const size_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 871 | }; |
| 872 | |
| 873 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 874 | // static |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 875 | OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) { |
| 876 | // Open a physical file |
| 877 | HANDLE file = CreateFileA(name, GENERIC_READ | GENERIC_WRITE, |
| 878 | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); |
| 879 | if (file == INVALID_HANDLE_VALUE) return NULL; |
| 880 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 881 | DWORD size = GetFileSize(file, NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 882 | |
| 883 | // Create a file mapping for the physical file |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 884 | HANDLE file_mapping = |
| 885 | CreateFileMapping(file, NULL, PAGE_READWRITE, 0, size, NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 886 | if (file_mapping == NULL) return NULL; |
| 887 | |
| 888 | // Map a view of the file into memory |
| 889 | void* memory = MapViewOfFile(file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size); |
| 890 | return new Win32MemoryMappedFile(file, file_mapping, memory, size); |
| 891 | } |
| 892 | |
| 893 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 894 | // static |
| 895 | OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, |
| 896 | size_t size, void* initial) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 897 | // Open a physical file |
| 898 | HANDLE file = CreateFileA(name, GENERIC_READ | GENERIC_WRITE, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 899 | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, |
| 900 | OPEN_ALWAYS, 0, NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 901 | if (file == NULL) return NULL; |
| 902 | // Create a file mapping for the physical file |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 903 | HANDLE file_mapping = CreateFileMapping(file, NULL, PAGE_READWRITE, 0, |
| 904 | static_cast<DWORD>(size), NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 905 | if (file_mapping == NULL) return NULL; |
| 906 | // Map a view of the file into memory |
| 907 | void* memory = MapViewOfFile(file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size); |
| 908 | if (memory) memmove(memory, initial, size); |
| 909 | return new Win32MemoryMappedFile(file, file_mapping, memory, size); |
| 910 | } |
| 911 | |
| 912 | |
| 913 | Win32MemoryMappedFile::~Win32MemoryMappedFile() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 914 | if (memory_) UnmapViewOfFile(memory_); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 915 | CloseHandle(file_mapping_); |
| 916 | CloseHandle(file_); |
| 917 | } |
| 918 | |
| 919 | |
| 920 | // The following code loads functions defined in DbhHelp.h and TlHelp32.h |
| 921 | // dynamically. This is to avoid being depending on dbghelp.dll and |
| 922 | // tlhelp32.dll when running (the functions in tlhelp32.dll have been moved to |
| 923 | // kernel32.dll at some point so loading functions defines in TlHelp32.h |
| 924 | // dynamically might not be necessary any more - for some versions of Windows?). |
| 925 | |
| 926 | // Function pointers to functions dynamically loaded from dbghelp.dll. |
| 927 | #define DBGHELP_FUNCTION_LIST(V) \ |
| 928 | V(SymInitialize) \ |
| 929 | V(SymGetOptions) \ |
| 930 | V(SymSetOptions) \ |
| 931 | V(SymGetSearchPath) \ |
| 932 | V(SymLoadModule64) \ |
| 933 | V(StackWalk64) \ |
| 934 | V(SymGetSymFromAddr64) \ |
| 935 | V(SymGetLineFromAddr64) \ |
| 936 | V(SymFunctionTableAccess64) \ |
| 937 | V(SymGetModuleBase64) |
| 938 | |
| 939 | // Function pointers to functions dynamically loaded from dbghelp.dll. |
| 940 | #define TLHELP32_FUNCTION_LIST(V) \ |
| 941 | V(CreateToolhelp32Snapshot) \ |
| 942 | V(Module32FirstW) \ |
| 943 | V(Module32NextW) |
| 944 | |
| 945 | // Define the decoration to use for the type and variable name used for |
| 946 | // dynamically loaded DLL function.. |
| 947 | #define DLL_FUNC_TYPE(name) _##name##_ |
| 948 | #define DLL_FUNC_VAR(name) _##name |
| 949 | |
| 950 | // Define the type for each dynamically loaded DLL function. The function |
| 951 | // definitions are copied from DbgHelp.h and TlHelp32.h. The IN and VOID macros |
| 952 | // from the Windows include files are redefined here to have the function |
| 953 | // definitions to be as close to the ones in the original .h files as possible. |
| 954 | #ifndef IN |
| 955 | #define IN |
| 956 | #endif |
| 957 | #ifndef VOID |
| 958 | #define VOID void |
| 959 | #endif |
| 960 | |
| 961 | // DbgHelp isn't supported on MinGW yet |
| 962 | #ifndef __MINGW32__ |
| 963 | // DbgHelp.h functions. |
| 964 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymInitialize))(IN HANDLE hProcess, |
| 965 | IN PSTR UserSearchPath, |
| 966 | IN BOOL fInvadeProcess); |
| 967 | typedef DWORD (__stdcall *DLL_FUNC_TYPE(SymGetOptions))(VOID); |
| 968 | typedef DWORD (__stdcall *DLL_FUNC_TYPE(SymSetOptions))(IN DWORD SymOptions); |
| 969 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetSearchPath))( |
| 970 | IN HANDLE hProcess, |
| 971 | OUT PSTR SearchPath, |
| 972 | IN DWORD SearchPathLength); |
| 973 | typedef DWORD64 (__stdcall *DLL_FUNC_TYPE(SymLoadModule64))( |
| 974 | IN HANDLE hProcess, |
| 975 | IN HANDLE hFile, |
| 976 | IN PSTR ImageName, |
| 977 | IN PSTR ModuleName, |
| 978 | IN DWORD64 BaseOfDll, |
| 979 | IN DWORD SizeOfDll); |
| 980 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(StackWalk64))( |
| 981 | DWORD MachineType, |
| 982 | HANDLE hProcess, |
| 983 | HANDLE hThread, |
| 984 | LPSTACKFRAME64 StackFrame, |
| 985 | PVOID ContextRecord, |
| 986 | PREAD_PROCESS_MEMORY_ROUTINE64 ReadMemoryRoutine, |
| 987 | PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine, |
| 988 | PGET_MODULE_BASE_ROUTINE64 GetModuleBaseRoutine, |
| 989 | PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress); |
| 990 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetSymFromAddr64))( |
| 991 | IN HANDLE hProcess, |
| 992 | IN DWORD64 qwAddr, |
| 993 | OUT PDWORD64 pdwDisplacement, |
| 994 | OUT PIMAGEHLP_SYMBOL64 Symbol); |
| 995 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetLineFromAddr64))( |
| 996 | IN HANDLE hProcess, |
| 997 | IN DWORD64 qwAddr, |
| 998 | OUT PDWORD pdwDisplacement, |
| 999 | OUT PIMAGEHLP_LINE64 Line64); |
| 1000 | // DbgHelp.h typedefs. Implementation found in dbghelp.dll. |
| 1001 | typedef PVOID (__stdcall *DLL_FUNC_TYPE(SymFunctionTableAccess64))( |
| 1002 | HANDLE hProcess, |
| 1003 | DWORD64 AddrBase); // DbgHelp.h typedef PFUNCTION_TABLE_ACCESS_ROUTINE64 |
| 1004 | typedef DWORD64 (__stdcall *DLL_FUNC_TYPE(SymGetModuleBase64))( |
| 1005 | HANDLE hProcess, |
| 1006 | DWORD64 AddrBase); // DbgHelp.h typedef PGET_MODULE_BASE_ROUTINE64 |
| 1007 | |
| 1008 | // TlHelp32.h functions. |
| 1009 | typedef HANDLE (__stdcall *DLL_FUNC_TYPE(CreateToolhelp32Snapshot))( |
| 1010 | DWORD dwFlags, |
| 1011 | DWORD th32ProcessID); |
| 1012 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(Module32FirstW))(HANDLE hSnapshot, |
| 1013 | LPMODULEENTRY32W lpme); |
| 1014 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(Module32NextW))(HANDLE hSnapshot, |
| 1015 | LPMODULEENTRY32W lpme); |
| 1016 | |
| 1017 | #undef IN |
| 1018 | #undef VOID |
| 1019 | |
| 1020 | // Declare a variable for each dynamically loaded DLL function. |
| 1021 | #define DEF_DLL_FUNCTION(name) DLL_FUNC_TYPE(name) DLL_FUNC_VAR(name) = NULL; |
| 1022 | DBGHELP_FUNCTION_LIST(DEF_DLL_FUNCTION) |
| 1023 | TLHELP32_FUNCTION_LIST(DEF_DLL_FUNCTION) |
| 1024 | #undef DEF_DLL_FUNCTION |
| 1025 | |
| 1026 | // Load the functions. This function has a lot of "ugly" macros in order to |
| 1027 | // keep down code duplication. |
| 1028 | |
| 1029 | static bool LoadDbgHelpAndTlHelp32() { |
| 1030 | static bool dbghelp_loaded = false; |
| 1031 | |
| 1032 | if (dbghelp_loaded) return true; |
| 1033 | |
| 1034 | HMODULE module; |
| 1035 | |
| 1036 | // Load functions from the dbghelp.dll module. |
| 1037 | module = LoadLibrary(TEXT("dbghelp.dll")); |
| 1038 | if (module == NULL) { |
| 1039 | return false; |
| 1040 | } |
| 1041 | |
| 1042 | #define LOAD_DLL_FUNC(name) \ |
| 1043 | DLL_FUNC_VAR(name) = \ |
| 1044 | reinterpret_cast<DLL_FUNC_TYPE(name)>(GetProcAddress(module, #name)); |
| 1045 | |
| 1046 | DBGHELP_FUNCTION_LIST(LOAD_DLL_FUNC) |
| 1047 | |
| 1048 | #undef LOAD_DLL_FUNC |
| 1049 | |
| 1050 | // Load functions from the kernel32.dll module (the TlHelp32.h function used |
| 1051 | // to be in tlhelp32.dll but are now moved to kernel32.dll). |
| 1052 | module = LoadLibrary(TEXT("kernel32.dll")); |
| 1053 | if (module == NULL) { |
| 1054 | return false; |
| 1055 | } |
| 1056 | |
| 1057 | #define LOAD_DLL_FUNC(name) \ |
| 1058 | DLL_FUNC_VAR(name) = \ |
| 1059 | reinterpret_cast<DLL_FUNC_TYPE(name)>(GetProcAddress(module, #name)); |
| 1060 | |
| 1061 | TLHELP32_FUNCTION_LIST(LOAD_DLL_FUNC) |
| 1062 | |
| 1063 | #undef LOAD_DLL_FUNC |
| 1064 | |
| 1065 | // Check that all functions where loaded. |
| 1066 | bool result = |
| 1067 | #define DLL_FUNC_LOADED(name) (DLL_FUNC_VAR(name) != NULL) && |
| 1068 | |
| 1069 | DBGHELP_FUNCTION_LIST(DLL_FUNC_LOADED) |
| 1070 | TLHELP32_FUNCTION_LIST(DLL_FUNC_LOADED) |
| 1071 | |
| 1072 | #undef DLL_FUNC_LOADED |
| 1073 | true; |
| 1074 | |
| 1075 | dbghelp_loaded = result; |
| 1076 | return result; |
| 1077 | // NOTE: The modules are never unloaded and will stay around until the |
| 1078 | // application is closed. |
| 1079 | } |
| 1080 | |
| 1081 | #undef DBGHELP_FUNCTION_LIST |
| 1082 | #undef TLHELP32_FUNCTION_LIST |
| 1083 | #undef DLL_FUNC_VAR |
| 1084 | #undef DLL_FUNC_TYPE |
| 1085 | |
| 1086 | |
| 1087 | // Load the symbols for generating stack traces. |
| 1088 | static std::vector<OS::SharedLibraryAddress> LoadSymbols( |
| 1089 | HANDLE process_handle) { |
| 1090 | static std::vector<OS::SharedLibraryAddress> result; |
| 1091 | |
| 1092 | static bool symbols_loaded = false; |
| 1093 | |
| 1094 | if (symbols_loaded) return result; |
| 1095 | |
| 1096 | BOOL ok; |
| 1097 | |
| 1098 | // Initialize the symbol engine. |
| 1099 | ok = _SymInitialize(process_handle, // hProcess |
| 1100 | NULL, // UserSearchPath |
| 1101 | false); // fInvadeProcess |
| 1102 | if (!ok) return result; |
| 1103 | |
| 1104 | DWORD options = _SymGetOptions(); |
| 1105 | options |= SYMOPT_LOAD_LINES; |
| 1106 | options |= SYMOPT_FAIL_CRITICAL_ERRORS; |
| 1107 | options = _SymSetOptions(options); |
| 1108 | |
| 1109 | char buf[OS::kStackWalkMaxNameLen] = {0}; |
| 1110 | ok = _SymGetSearchPath(process_handle, buf, OS::kStackWalkMaxNameLen); |
| 1111 | if (!ok) { |
| 1112 | int err = GetLastError(); |
| 1113 | OS::Print("%d\n", err); |
| 1114 | return result; |
| 1115 | } |
| 1116 | |
| 1117 | HANDLE snapshot = _CreateToolhelp32Snapshot( |
| 1118 | TH32CS_SNAPMODULE, // dwFlags |
| 1119 | GetCurrentProcessId()); // th32ProcessId |
| 1120 | if (snapshot == INVALID_HANDLE_VALUE) return result; |
| 1121 | MODULEENTRY32W module_entry; |
| 1122 | module_entry.dwSize = sizeof(module_entry); // Set the size of the structure. |
| 1123 | BOOL cont = _Module32FirstW(snapshot, &module_entry); |
| 1124 | while (cont) { |
| 1125 | DWORD64 base; |
| 1126 | // NOTE the SymLoadModule64 function has the peculiarity of accepting a |
| 1127 | // both unicode and ASCII strings even though the parameter is PSTR. |
| 1128 | base = _SymLoadModule64( |
| 1129 | process_handle, // hProcess |
| 1130 | 0, // hFile |
| 1131 | reinterpret_cast<PSTR>(module_entry.szExePath), // ImageName |
| 1132 | reinterpret_cast<PSTR>(module_entry.szModule), // ModuleName |
| 1133 | reinterpret_cast<DWORD64>(module_entry.modBaseAddr), // BaseOfDll |
| 1134 | module_entry.modBaseSize); // SizeOfDll |
| 1135 | if (base == 0) { |
| 1136 | int err = GetLastError(); |
| 1137 | if (err != ERROR_MOD_NOT_FOUND && |
| 1138 | err != ERROR_INVALID_HANDLE) { |
| 1139 | result.clear(); |
| 1140 | return result; |
| 1141 | } |
| 1142 | } |
| 1143 | int lib_name_length = WideCharToMultiByte( |
| 1144 | CP_UTF8, 0, module_entry.szExePath, -1, NULL, 0, NULL, NULL); |
| 1145 | std::string lib_name(lib_name_length, 0); |
| 1146 | WideCharToMultiByte(CP_UTF8, 0, module_entry.szExePath, -1, &lib_name[0], |
| 1147 | lib_name_length, NULL, NULL); |
| 1148 | result.push_back(OS::SharedLibraryAddress( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1149 | lib_name, reinterpret_cast<uintptr_t>(module_entry.modBaseAddr), |
| 1150 | reinterpret_cast<uintptr_t>(module_entry.modBaseAddr + |
| 1151 | module_entry.modBaseSize))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1152 | cont = _Module32NextW(snapshot, &module_entry); |
| 1153 | } |
| 1154 | CloseHandle(snapshot); |
| 1155 | |
| 1156 | symbols_loaded = true; |
| 1157 | return result; |
| 1158 | } |
| 1159 | |
| 1160 | |
| 1161 | std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() { |
| 1162 | // SharedLibraryEvents are logged when loading symbol information. |
| 1163 | // Only the shared libraries loaded at the time of the call to |
| 1164 | // GetSharedLibraryAddresses are logged. DLLs loaded after |
| 1165 | // initialization are not accounted for. |
| 1166 | if (!LoadDbgHelpAndTlHelp32()) return std::vector<OS::SharedLibraryAddress>(); |
| 1167 | HANDLE process_handle = GetCurrentProcess(); |
| 1168 | return LoadSymbols(process_handle); |
| 1169 | } |
| 1170 | |
| 1171 | |
| 1172 | void OS::SignalCodeMovingGC() { |
| 1173 | } |
| 1174 | |
| 1175 | |
| 1176 | #else // __MINGW32__ |
| 1177 | std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() { |
| 1178 | return std::vector<OS::SharedLibraryAddress>(); |
| 1179 | } |
| 1180 | |
| 1181 | |
| 1182 | void OS::SignalCodeMovingGC() { } |
| 1183 | #endif // __MINGW32__ |
| 1184 | |
| 1185 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1186 | int OS::ActivationFrameAlignment() { |
| 1187 | #ifdef _WIN64 |
| 1188 | return 16; // Windows 64-bit ABI requires the stack to be 16-byte aligned. |
| 1189 | #elif defined(__MINGW32__) |
| 1190 | // With gcc 4.4 the tree vectorization optimizer can generate code |
| 1191 | // that requires 16 byte alignment such as movdqa on x86. |
| 1192 | return 16; |
| 1193 | #else |
| 1194 | return 8; // Floating-point math runs faster with 8-byte alignment. |
| 1195 | #endif |
| 1196 | } |
| 1197 | |
| 1198 | |
| 1199 | VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } |
| 1200 | |
| 1201 | |
| 1202 | VirtualMemory::VirtualMemory(size_t size) |
| 1203 | : address_(ReserveRegion(size)), size_(size) { } |
| 1204 | |
| 1205 | |
| 1206 | VirtualMemory::VirtualMemory(size_t size, size_t alignment) |
| 1207 | : address_(NULL), size_(0) { |
| 1208 | DCHECK((alignment % OS::AllocateAlignment()) == 0); |
| 1209 | size_t request_size = RoundUp(size + alignment, |
| 1210 | static_cast<intptr_t>(OS::AllocateAlignment())); |
| 1211 | void* address = ReserveRegion(request_size); |
| 1212 | if (address == NULL) return; |
| 1213 | uint8_t* base = RoundUp(static_cast<uint8_t*>(address), alignment); |
| 1214 | // Try reducing the size by freeing and then reallocating a specific area. |
| 1215 | bool result = ReleaseRegion(address, request_size); |
| 1216 | USE(result); |
| 1217 | DCHECK(result); |
| 1218 | address = VirtualAlloc(base, size, MEM_RESERVE, PAGE_NOACCESS); |
| 1219 | if (address != NULL) { |
| 1220 | request_size = size; |
| 1221 | DCHECK(base == static_cast<uint8_t*>(address)); |
| 1222 | } else { |
| 1223 | // Resizing failed, just go with a bigger area. |
| 1224 | address = ReserveRegion(request_size); |
| 1225 | if (address == NULL) return; |
| 1226 | } |
| 1227 | address_ = address; |
| 1228 | size_ = request_size; |
| 1229 | } |
| 1230 | |
| 1231 | |
| 1232 | VirtualMemory::~VirtualMemory() { |
| 1233 | if (IsReserved()) { |
| 1234 | bool result = ReleaseRegion(address(), size()); |
| 1235 | DCHECK(result); |
| 1236 | USE(result); |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | |
| 1241 | bool VirtualMemory::IsReserved() { |
| 1242 | return address_ != NULL; |
| 1243 | } |
| 1244 | |
| 1245 | |
| 1246 | void VirtualMemory::Reset() { |
| 1247 | address_ = NULL; |
| 1248 | size_ = 0; |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) { |
| 1253 | return CommitRegion(address, size, is_executable); |
| 1254 | } |
| 1255 | |
| 1256 | |
| 1257 | bool VirtualMemory::Uncommit(void* address, size_t size) { |
| 1258 | DCHECK(IsReserved()); |
| 1259 | return UncommitRegion(address, size); |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | bool VirtualMemory::Guard(void* address) { |
| 1264 | if (NULL == VirtualAlloc(address, |
| 1265 | OS::CommitPageSize(), |
| 1266 | MEM_COMMIT, |
| 1267 | PAGE_NOACCESS)) { |
| 1268 | return false; |
| 1269 | } |
| 1270 | return true; |
| 1271 | } |
| 1272 | |
| 1273 | |
| 1274 | void* VirtualMemory::ReserveRegion(size_t size) { |
| 1275 | return RandomizedVirtualAlloc(size, MEM_RESERVE, PAGE_NOACCESS); |
| 1276 | } |
| 1277 | |
| 1278 | |
| 1279 | bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) { |
| 1280 | int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
| 1281 | if (NULL == VirtualAlloc(base, size, MEM_COMMIT, prot)) { |
| 1282 | return false; |
| 1283 | } |
| 1284 | return true; |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | bool VirtualMemory::UncommitRegion(void* base, size_t size) { |
| 1289 | return VirtualFree(base, size, MEM_DECOMMIT) != 0; |
| 1290 | } |
| 1291 | |
| 1292 | |
| 1293 | bool VirtualMemory::ReleaseRegion(void* base, size_t size) { |
| 1294 | return VirtualFree(base, 0, MEM_RELEASE) != 0; |
| 1295 | } |
| 1296 | |
| 1297 | |
| 1298 | bool VirtualMemory::HasLazyCommits() { |
| 1299 | // TODO(alph): implement for the platform. |
| 1300 | return false; |
| 1301 | } |
| 1302 | |
| 1303 | |
| 1304 | // ---------------------------------------------------------------------------- |
| 1305 | // Win32 thread support. |
| 1306 | |
| 1307 | // Definition of invalid thread handle and id. |
| 1308 | static const HANDLE kNoThread = INVALID_HANDLE_VALUE; |
| 1309 | |
| 1310 | // Entry point for threads. The supplied argument is a pointer to the thread |
| 1311 | // object. The entry function dispatches to the run method in the thread |
| 1312 | // object. It is important that this function has __stdcall calling |
| 1313 | // convention. |
| 1314 | static unsigned int __stdcall ThreadEntry(void* arg) { |
| 1315 | Thread* thread = reinterpret_cast<Thread*>(arg); |
| 1316 | thread->NotifyStartedAndRun(); |
| 1317 | return 0; |
| 1318 | } |
| 1319 | |
| 1320 | |
| 1321 | class Thread::PlatformData { |
| 1322 | public: |
| 1323 | explicit PlatformData(HANDLE thread) : thread_(thread) {} |
| 1324 | HANDLE thread_; |
| 1325 | unsigned thread_id_; |
| 1326 | }; |
| 1327 | |
| 1328 | |
| 1329 | // Initialize a Win32 thread object. The thread has an invalid thread |
| 1330 | // handle until it is started. |
| 1331 | |
| 1332 | Thread::Thread(const Options& options) |
| 1333 | : stack_size_(options.stack_size()), |
| 1334 | start_semaphore_(NULL) { |
| 1335 | data_ = new PlatformData(kNoThread); |
| 1336 | set_name(options.name()); |
| 1337 | } |
| 1338 | |
| 1339 | |
| 1340 | void Thread::set_name(const char* name) { |
| 1341 | OS::StrNCpy(name_, sizeof(name_), name, strlen(name)); |
| 1342 | name_[sizeof(name_) - 1] = '\0'; |
| 1343 | } |
| 1344 | |
| 1345 | |
| 1346 | // Close our own handle for the thread. |
| 1347 | Thread::~Thread() { |
| 1348 | if (data_->thread_ != kNoThread) CloseHandle(data_->thread_); |
| 1349 | delete data_; |
| 1350 | } |
| 1351 | |
| 1352 | |
| 1353 | // Create a new thread. It is important to use _beginthreadex() instead of |
| 1354 | // the Win32 function CreateThread(), because the CreateThread() does not |
| 1355 | // initialize thread specific structures in the C runtime library. |
| 1356 | void Thread::Start() { |
| 1357 | data_->thread_ = reinterpret_cast<HANDLE>( |
| 1358 | _beginthreadex(NULL, |
| 1359 | static_cast<unsigned>(stack_size_), |
| 1360 | ThreadEntry, |
| 1361 | this, |
| 1362 | 0, |
| 1363 | &data_->thread_id_)); |
| 1364 | } |
| 1365 | |
| 1366 | |
| 1367 | // Wait for thread to terminate. |
| 1368 | void Thread::Join() { |
| 1369 | if (data_->thread_id_ != GetCurrentThreadId()) { |
| 1370 | WaitForSingleObject(data_->thread_, INFINITE); |
| 1371 | } |
| 1372 | } |
| 1373 | |
| 1374 | |
| 1375 | Thread::LocalStorageKey Thread::CreateThreadLocalKey() { |
| 1376 | DWORD result = TlsAlloc(); |
| 1377 | DCHECK(result != TLS_OUT_OF_INDEXES); |
| 1378 | return static_cast<LocalStorageKey>(result); |
| 1379 | } |
| 1380 | |
| 1381 | |
| 1382 | void Thread::DeleteThreadLocalKey(LocalStorageKey key) { |
| 1383 | BOOL result = TlsFree(static_cast<DWORD>(key)); |
| 1384 | USE(result); |
| 1385 | DCHECK(result); |
| 1386 | } |
| 1387 | |
| 1388 | |
| 1389 | void* Thread::GetThreadLocal(LocalStorageKey key) { |
| 1390 | return TlsGetValue(static_cast<DWORD>(key)); |
| 1391 | } |
| 1392 | |
| 1393 | |
| 1394 | void Thread::SetThreadLocal(LocalStorageKey key, void* value) { |
| 1395 | BOOL result = TlsSetValue(static_cast<DWORD>(key), value); |
| 1396 | USE(result); |
| 1397 | DCHECK(result); |
| 1398 | } |
| 1399 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1400 | } // namespace base |
| 1401 | } // namespace v8 |