ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // Platform specific code for Win32. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 29 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 30 | #define V8_WIN32_HEADERS_FULL |
| 31 | #include "win32-headers.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 32 | |
| 33 | #include "v8.h" |
| 34 | |
| 35 | #include "platform.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 36 | #include "vm-state-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 37 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 38 | // Extra POSIX/ANSI routines for Win32 when when using Visual Studio C++. Please |
| 39 | // refer to The Open Group Base Specification for specification of the correct |
| 40 | // semantics for these functions. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 41 | // (http://www.opengroup.org/onlinepubs/000095399/) |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 42 | #ifdef _MSC_VER |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 43 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 44 | namespace v8 { |
| 45 | namespace internal { |
| 46 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 47 | // Test for finite value - usually defined in math.h |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 48 | int isfinite(double x) { |
| 49 | return _finite(x); |
| 50 | } |
| 51 | |
| 52 | } // namespace v8 |
| 53 | } // namespace internal |
| 54 | |
| 55 | // Test for a NaN (not a number) value - usually defined in math.h |
| 56 | int isnan(double x) { |
| 57 | return _isnan(x); |
| 58 | } |
| 59 | |
| 60 | |
| 61 | // Test for infinity - usually defined in math.h |
| 62 | int isinf(double x) { |
| 63 | return (_fpclass(x) & (_FPCLASS_PINF | _FPCLASS_NINF)) != 0; |
| 64 | } |
| 65 | |
| 66 | |
| 67 | // Test if x is less than y and both nominal - usually defined in math.h |
| 68 | int isless(double x, double y) { |
| 69 | return isnan(x) || isnan(y) ? 0 : x < y; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | // Test if x is greater than y and both nominal - usually defined in math.h |
| 74 | int isgreater(double x, double y) { |
| 75 | return isnan(x) || isnan(y) ? 0 : x > y; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | // Classify floating point number - usually defined in math.h |
| 80 | int fpclassify(double x) { |
| 81 | // Use the MS-specific _fpclass() for classification. |
| 82 | int flags = _fpclass(x); |
| 83 | |
| 84 | // Determine class. We cannot use a switch statement because |
| 85 | // the _FPCLASS_ constants are defined as flags. |
| 86 | if (flags & (_FPCLASS_PN | _FPCLASS_NN)) return FP_NORMAL; |
| 87 | if (flags & (_FPCLASS_PZ | _FPCLASS_NZ)) return FP_ZERO; |
| 88 | if (flags & (_FPCLASS_PD | _FPCLASS_ND)) return FP_SUBNORMAL; |
| 89 | if (flags & (_FPCLASS_PINF | _FPCLASS_NINF)) return FP_INFINITE; |
| 90 | |
| 91 | // All cases should be covered by the code above. |
| 92 | ASSERT(flags & (_FPCLASS_SNAN | _FPCLASS_QNAN)); |
| 93 | return FP_NAN; |
| 94 | } |
| 95 | |
| 96 | |
| 97 | // Test sign - usually defined in math.h |
| 98 | int signbit(double x) { |
| 99 | // We need to take care of the special case of both positive |
| 100 | // and negative versions of zero. |
| 101 | if (x == 0) |
| 102 | return _fpclass(x) & _FPCLASS_NZ; |
| 103 | else |
| 104 | return x < 0; |
| 105 | } |
| 106 | |
| 107 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 108 | // Case-insensitive bounded string comparisons. Use stricmp() on Win32. Usually |
| 109 | // defined in strings.h. |
| 110 | int strncasecmp(const char* s1, const char* s2, int n) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 111 | return _strnicmp(s1, s2, n); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 112 | } |
| 113 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 114 | #endif // _MSC_VER |
| 115 | |
| 116 | |
| 117 | // Extra functions for MinGW. Most of these are the _s functions which are in |
| 118 | // the Microsoft Visual Studio C++ CRT. |
| 119 | #ifdef __MINGW32__ |
| 120 | |
| 121 | int localtime_s(tm* out_tm, const time_t* time) { |
| 122 | tm* posix_local_time_struct = localtime(time); |
| 123 | if (posix_local_time_struct == NULL) return 1; |
| 124 | *out_tm = *posix_local_time_struct; |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | |
| 129 | // Not sure this the correct interpretation of _mkgmtime |
| 130 | time_t _mkgmtime(tm* timeptr) { |
| 131 | return mktime(timeptr); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | int fopen_s(FILE** pFile, const char* filename, const char* mode) { |
| 136 | *pFile = fopen(filename, mode); |
| 137 | return *pFile != NULL ? 0 : 1; |
| 138 | } |
| 139 | |
| 140 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 141 | #define _TRUNCATE 0 |
| 142 | #define STRUNCATE 80 |
| 143 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 144 | int _vsnprintf_s(char* buffer, size_t sizeOfBuffer, size_t count, |
| 145 | const char* format, va_list argptr) { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 146 | ASSERT(count == _TRUNCATE); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 147 | return _vsnprintf(buffer, sizeOfBuffer, format, argptr); |
| 148 | } |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 149 | |
| 150 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 151 | int strncpy_s(char* dest, size_t dest_size, const char* source, size_t count) { |
| 152 | CHECK(source != NULL); |
| 153 | CHECK(dest != NULL); |
| 154 | CHECK_GT(dest_size, 0); |
| 155 | |
| 156 | if (count == _TRUNCATE) { |
| 157 | while (dest_size > 0 && *source != 0) { |
| 158 | *(dest++) = *(source++); |
| 159 | --dest_size; |
| 160 | } |
| 161 | if (dest_size == 0) { |
| 162 | *(dest - 1) = 0; |
| 163 | return STRUNCATE; |
| 164 | } |
| 165 | } else { |
| 166 | while (dest_size > 0 && count > 0 && *source != 0) { |
| 167 | *(dest++) = *(source++); |
| 168 | --dest_size; |
| 169 | --count; |
| 170 | } |
| 171 | } |
| 172 | CHECK_GT(dest_size, 0); |
| 173 | *dest = 0; |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 174 | return 0; |
| 175 | } |
| 176 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 177 | |
| 178 | inline void MemoryBarrier() { |
| 179 | int barrier = 0; |
| 180 | __asm__ __volatile__("xchgl %%eax,%0 ":"=r" (barrier)); |
| 181 | } |
| 182 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 183 | #endif // __MINGW32__ |
| 184 | |
| 185 | // Generate a pseudo-random number in the range 0-2^31-1. Usually |
| 186 | // defined in stdlib.h. Missing in both Microsoft Visual Studio C++ and MinGW. |
| 187 | int random() { |
| 188 | return rand(); |
| 189 | } |
| 190 | |
| 191 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 192 | namespace v8 { |
| 193 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 194 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 195 | intptr_t OS::MaxVirtualMemory() { |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 200 | double ceiling(double x) { |
| 201 | return ceil(x); |
| 202 | } |
| 203 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 204 | |
| 205 | static Mutex* limit_mutex = NULL; |
| 206 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 207 | #if defined(V8_TARGET_ARCH_IA32) |
| 208 | static OS::MemCopyFunction memcopy_function = NULL; |
| 209 | static Mutex* memcopy_function_mutex = OS::CreateMutex(); |
| 210 | // Defined in codegen-ia32.cc. |
| 211 | OS::MemCopyFunction CreateMemCopyFunction(); |
| 212 | |
| 213 | // Copy memory area to disjoint memory area. |
| 214 | void OS::MemCopy(void* dest, const void* src, size_t size) { |
| 215 | if (memcopy_function == NULL) { |
| 216 | ScopedLock lock(memcopy_function_mutex); |
| 217 | if (memcopy_function == NULL) { |
| 218 | OS::MemCopyFunction temp = CreateMemCopyFunction(); |
| 219 | MemoryBarrier(); |
| 220 | memcopy_function = temp; |
| 221 | } |
| 222 | } |
| 223 | // Note: here we rely on dependent reads being ordered. This is true |
| 224 | // on all architectures we currently support. |
| 225 | (*memcopy_function)(dest, src, size); |
| 226 | #ifdef DEBUG |
| 227 | CHECK_EQ(0, memcmp(dest, src, size)); |
| 228 | #endif |
| 229 | } |
| 230 | #endif // V8_TARGET_ARCH_IA32 |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 231 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 232 | #ifdef _WIN64 |
| 233 | typedef double (*ModuloFunction)(double, double); |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 234 | static ModuloFunction modulo_function = NULL; |
| 235 | static Mutex* modulo_function_mutex = OS::CreateMutex(); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 236 | // Defined in codegen-x64.cc. |
| 237 | ModuloFunction CreateModuloFunction(); |
| 238 | |
| 239 | double modulo(double x, double y) { |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 240 | if (modulo_function == NULL) { |
| 241 | ScopedLock lock(modulo_function_mutex); |
| 242 | if (modulo_function == NULL) { |
| 243 | ModuloFunction temp = CreateModuloFunction(); |
| 244 | MemoryBarrier(); |
| 245 | modulo_function = temp; |
| 246 | } |
| 247 | } |
| 248 | // Note: here we rely on dependent reads being ordered. This is true |
| 249 | // on all architectures we currently support. |
| 250 | return (*modulo_function)(x, y); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 251 | } |
| 252 | #else // Win32 |
| 253 | |
| 254 | double modulo(double x, double y) { |
| 255 | // Workaround MS fmod bugs. ECMA-262 says: |
| 256 | // dividend is finite and divisor is an infinity => result equals dividend |
| 257 | // dividend is a zero and divisor is nonzero finite => result equals dividend |
| 258 | if (!(isfinite(x) && (!isfinite(y) && !isnan(y))) && |
| 259 | !(x == 0 && (y != 0 && isfinite(y)))) { |
| 260 | x = fmod(x, y); |
| 261 | } |
| 262 | return x; |
| 263 | } |
| 264 | |
| 265 | #endif // _WIN64 |
| 266 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 267 | // ---------------------------------------------------------------------------- |
| 268 | // The Time class represents time on win32. A timestamp is represented as |
| 269 | // a 64-bit integer in 100 nano-seconds since January 1, 1601 (UTC). JavaScript |
| 270 | // timestamps are represented as a doubles in milliseconds since 00:00:00 UTC, |
| 271 | // January 1, 1970. |
| 272 | |
| 273 | class Time { |
| 274 | public: |
| 275 | // Constructors. |
| 276 | Time(); |
| 277 | explicit Time(double jstime); |
| 278 | Time(int year, int mon, int day, int hour, int min, int sec); |
| 279 | |
| 280 | // Convert timestamp to JavaScript representation. |
| 281 | double ToJSTime(); |
| 282 | |
| 283 | // Set timestamp to current time. |
| 284 | void SetToCurrentTime(); |
| 285 | |
| 286 | // Returns the local timezone offset in milliseconds east of UTC. This is |
| 287 | // the number of milliseconds you must add to UTC to get local time, i.e. |
| 288 | // LocalOffset(CET) = 3600000 and LocalOffset(PST) = -28800000. This |
| 289 | // routine also takes into account whether daylight saving is effect |
| 290 | // at the time. |
| 291 | int64_t LocalOffset(); |
| 292 | |
| 293 | // Returns the daylight savings time offset for the time in milliseconds. |
| 294 | int64_t DaylightSavingsOffset(); |
| 295 | |
| 296 | // Returns a string identifying the current timezone for the |
| 297 | // timestamp taking into account daylight saving. |
| 298 | char* LocalTimezone(); |
| 299 | |
| 300 | private: |
| 301 | // Constants for time conversion. |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 302 | static const int64_t kTimeEpoc = 116444736000000000LL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 303 | static const int64_t kTimeScaler = 10000; |
| 304 | static const int64_t kMsPerMinute = 60000; |
| 305 | |
| 306 | // Constants for timezone information. |
| 307 | static const int kTzNameSize = 128; |
| 308 | static const bool kShortTzNames = false; |
| 309 | |
| 310 | // Timezone information. We need to have static buffers for the |
| 311 | // timezone names because we return pointers to these in |
| 312 | // LocalTimezone(). |
| 313 | static bool tz_initialized_; |
| 314 | static TIME_ZONE_INFORMATION tzinfo_; |
| 315 | static char std_tz_name_[kTzNameSize]; |
| 316 | static char dst_tz_name_[kTzNameSize]; |
| 317 | |
| 318 | // Initialize the timezone information (if not already done). |
| 319 | static void TzSet(); |
| 320 | |
| 321 | // Guess the name of the timezone from the bias. |
| 322 | static const char* GuessTimezoneNameFromBias(int bias); |
| 323 | |
| 324 | // Return whether or not daylight savings time is in effect at this time. |
| 325 | bool InDST(); |
| 326 | |
| 327 | // Return the difference (in milliseconds) between this timestamp and |
| 328 | // another timestamp. |
| 329 | int64_t Diff(Time* other); |
| 330 | |
| 331 | // Accessor for FILETIME representation. |
| 332 | FILETIME& ft() { return time_.ft_; } |
| 333 | |
| 334 | // Accessor for integer representation. |
| 335 | int64_t& t() { return time_.t_; } |
| 336 | |
| 337 | // Although win32 uses 64-bit integers for representing timestamps, |
| 338 | // these are packed into a FILETIME structure. The FILETIME structure |
| 339 | // is just a struct representing a 64-bit integer. The TimeStamp union |
| 340 | // allows access to both a FILETIME and an integer representation of |
| 341 | // the timestamp. |
| 342 | union TimeStamp { |
| 343 | FILETIME ft_; |
| 344 | int64_t t_; |
| 345 | }; |
| 346 | |
| 347 | TimeStamp time_; |
| 348 | }; |
| 349 | |
| 350 | // Static variables. |
| 351 | bool Time::tz_initialized_ = false; |
| 352 | TIME_ZONE_INFORMATION Time::tzinfo_; |
| 353 | char Time::std_tz_name_[kTzNameSize]; |
| 354 | char Time::dst_tz_name_[kTzNameSize]; |
| 355 | |
| 356 | |
| 357 | // Initialize timestamp to start of epoc. |
| 358 | Time::Time() { |
| 359 | t() = 0; |
| 360 | } |
| 361 | |
| 362 | |
| 363 | // Initialize timestamp from a JavaScript timestamp. |
| 364 | Time::Time(double jstime) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 365 | t() = static_cast<int64_t>(jstime) * kTimeScaler + kTimeEpoc; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | |
| 369 | // Initialize timestamp from date/time components. |
| 370 | Time::Time(int year, int mon, int day, int hour, int min, int sec) { |
| 371 | SYSTEMTIME st; |
| 372 | st.wYear = year; |
| 373 | st.wMonth = mon; |
| 374 | st.wDay = day; |
| 375 | st.wHour = hour; |
| 376 | st.wMinute = min; |
| 377 | st.wSecond = sec; |
| 378 | st.wMilliseconds = 0; |
| 379 | SystemTimeToFileTime(&st, &ft()); |
| 380 | } |
| 381 | |
| 382 | |
| 383 | // Convert timestamp to JavaScript timestamp. |
| 384 | double Time::ToJSTime() { |
| 385 | return static_cast<double>((t() - kTimeEpoc) / kTimeScaler); |
| 386 | } |
| 387 | |
| 388 | |
| 389 | // Guess the name of the timezone from the bias. |
| 390 | // The guess is very biased towards the northern hemisphere. |
| 391 | const char* Time::GuessTimezoneNameFromBias(int bias) { |
| 392 | static const int kHour = 60; |
| 393 | switch (-bias) { |
| 394 | case -9*kHour: return "Alaska"; |
| 395 | case -8*kHour: return "Pacific"; |
| 396 | case -7*kHour: return "Mountain"; |
| 397 | case -6*kHour: return "Central"; |
| 398 | case -5*kHour: return "Eastern"; |
| 399 | case -4*kHour: return "Atlantic"; |
| 400 | case 0*kHour: return "GMT"; |
| 401 | case +1*kHour: return "Central Europe"; |
| 402 | case +2*kHour: return "Eastern Europe"; |
| 403 | case +3*kHour: return "Russia"; |
| 404 | case +5*kHour + 30: return "India"; |
| 405 | case +8*kHour: return "China"; |
| 406 | case +9*kHour: return "Japan"; |
| 407 | case +12*kHour: return "New Zealand"; |
| 408 | default: return "Local"; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | |
| 413 | // Initialize timezone information. The timezone information is obtained from |
| 414 | // windows. If we cannot get the timezone information we fall back to CET. |
| 415 | // Please notice that this code is not thread-safe. |
| 416 | void Time::TzSet() { |
| 417 | // Just return if timezone information has already been initialized. |
| 418 | if (tz_initialized_) return; |
| 419 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 420 | // Initialize POSIX time zone data. |
| 421 | _tzset(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 422 | // Obtain timezone information from operating system. |
| 423 | memset(&tzinfo_, 0, sizeof(tzinfo_)); |
| 424 | if (GetTimeZoneInformation(&tzinfo_) == TIME_ZONE_ID_INVALID) { |
| 425 | // If we cannot get timezone information we fall back to CET. |
| 426 | tzinfo_.Bias = -60; |
| 427 | tzinfo_.StandardDate.wMonth = 10; |
| 428 | tzinfo_.StandardDate.wDay = 5; |
| 429 | tzinfo_.StandardDate.wHour = 3; |
| 430 | tzinfo_.StandardBias = 0; |
| 431 | tzinfo_.DaylightDate.wMonth = 3; |
| 432 | tzinfo_.DaylightDate.wDay = 5; |
| 433 | tzinfo_.DaylightDate.wHour = 2; |
| 434 | tzinfo_.DaylightBias = -60; |
| 435 | } |
| 436 | |
| 437 | // Make standard and DST timezone names. |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 438 | WideCharToMultiByte(CP_UTF8, 0, tzinfo_.StandardName, -1, |
| 439 | std_tz_name_, kTzNameSize, NULL, NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 440 | std_tz_name_[kTzNameSize - 1] = '\0'; |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 441 | WideCharToMultiByte(CP_UTF8, 0, tzinfo_.DaylightName, -1, |
| 442 | dst_tz_name_, kTzNameSize, NULL, NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 443 | dst_tz_name_[kTzNameSize - 1] = '\0'; |
| 444 | |
| 445 | // If OS returned empty string or resource id (like "@tzres.dll,-211") |
| 446 | // simply guess the name from the UTC bias of the timezone. |
| 447 | // To properly resolve the resource identifier requires a library load, |
| 448 | // which is not possible in a sandbox. |
| 449 | if (std_tz_name_[0] == '\0' || std_tz_name_[0] == '@') { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 450 | OS::SNPrintF(Vector<char>(std_tz_name_, kTzNameSize - 1), |
| 451 | "%s Standard Time", |
| 452 | GuessTimezoneNameFromBias(tzinfo_.Bias)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 453 | } |
| 454 | if (dst_tz_name_[0] == '\0' || dst_tz_name_[0] == '@') { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 455 | OS::SNPrintF(Vector<char>(dst_tz_name_, kTzNameSize - 1), |
| 456 | "%s Daylight Time", |
| 457 | GuessTimezoneNameFromBias(tzinfo_.Bias)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | // Timezone information initialized. |
| 461 | tz_initialized_ = true; |
| 462 | } |
| 463 | |
| 464 | |
| 465 | // Return the difference in milliseconds between this and another timestamp. |
| 466 | int64_t Time::Diff(Time* other) { |
| 467 | return (t() - other->t()) / kTimeScaler; |
| 468 | } |
| 469 | |
| 470 | |
| 471 | // Set timestamp to current time. |
| 472 | void Time::SetToCurrentTime() { |
| 473 | // The default GetSystemTimeAsFileTime has a ~15.5ms resolution. |
| 474 | // Because we're fast, we like fast timers which have at least a |
| 475 | // 1ms resolution. |
| 476 | // |
| 477 | // timeGetTime() provides 1ms granularity when combined with |
| 478 | // timeBeginPeriod(). If the host application for v8 wants fast |
| 479 | // timers, it can use timeBeginPeriod to increase the resolution. |
| 480 | // |
| 481 | // Using timeGetTime() has a drawback because it is a 32bit value |
| 482 | // and hence rolls-over every ~49days. |
| 483 | // |
| 484 | // To use the clock, we use GetSystemTimeAsFileTime as our base; |
| 485 | // and then use timeGetTime to extrapolate current time from the |
| 486 | // start time. To deal with rollovers, we resync the clock |
| 487 | // any time when more than kMaxClockElapsedTime has passed or |
| 488 | // whenever timeGetTime creates a rollover. |
| 489 | |
| 490 | static bool initialized = false; |
| 491 | static TimeStamp init_time; |
| 492 | static DWORD init_ticks; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 493 | static const int64_t kHundredNanosecondsPerSecond = 10000000; |
| 494 | static const int64_t kMaxClockElapsedTime = |
| 495 | 60*kHundredNanosecondsPerSecond; // 1 minute |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 496 | |
| 497 | // If we are uninitialized, we need to resync the clock. |
| 498 | bool needs_resync = !initialized; |
| 499 | |
| 500 | // Get the current time. |
| 501 | TimeStamp time_now; |
| 502 | GetSystemTimeAsFileTime(&time_now.ft_); |
| 503 | DWORD ticks_now = timeGetTime(); |
| 504 | |
| 505 | // Check if we need to resync due to clock rollover. |
| 506 | needs_resync |= ticks_now < init_ticks; |
| 507 | |
| 508 | // Check if we need to resync due to elapsed time. |
| 509 | needs_resync |= (time_now.t_ - init_time.t_) > kMaxClockElapsedTime; |
| 510 | |
| 511 | // Resync the clock if necessary. |
| 512 | if (needs_resync) { |
| 513 | GetSystemTimeAsFileTime(&init_time.ft_); |
| 514 | init_ticks = ticks_now = timeGetTime(); |
| 515 | initialized = true; |
| 516 | } |
| 517 | |
| 518 | // Finally, compute the actual time. Why is this so hard. |
| 519 | DWORD elapsed = ticks_now - init_ticks; |
| 520 | this->time_.t_ = init_time.t_ + (static_cast<int64_t>(elapsed) * 10000); |
| 521 | } |
| 522 | |
| 523 | |
| 524 | // Return the local timezone offset in milliseconds east of UTC. This |
| 525 | // takes into account whether daylight saving is in effect at the time. |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 526 | // Only times in the 32-bit Unix range may be passed to this function. |
| 527 | // Also, adding the time-zone offset to the input must not overflow. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 528 | // The function EquivalentTime() in date.js guarantees this. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 529 | int64_t Time::LocalOffset() { |
| 530 | // Initialize timezone information, if needed. |
| 531 | TzSet(); |
| 532 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 533 | Time rounded_to_second(*this); |
| 534 | rounded_to_second.t() = rounded_to_second.t() / 1000 / kTimeScaler * |
| 535 | 1000 * kTimeScaler; |
| 536 | // Convert to local time using POSIX localtime function. |
| 537 | // Windows XP Service Pack 3 made SystemTimeToTzSpecificLocalTime() |
| 538 | // very slow. Other browsers use localtime(). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 539 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 540 | // Convert from JavaScript milliseconds past 1/1/1970 0:00:00 to |
| 541 | // POSIX seconds past 1/1/1970 0:00:00. |
| 542 | double unchecked_posix_time = rounded_to_second.ToJSTime() / 1000; |
| 543 | if (unchecked_posix_time > INT_MAX || unchecked_posix_time < 0) { |
| 544 | return 0; |
| 545 | } |
| 546 | // Because _USE_32BIT_TIME_T is defined, time_t is a 32-bit int. |
| 547 | time_t posix_time = static_cast<time_t>(unchecked_posix_time); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 548 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 549 | // Convert to local time, as struct with fields for day, hour, year, etc. |
| 550 | tm posix_local_time_struct; |
| 551 | if (localtime_s(&posix_local_time_struct, &posix_time)) return 0; |
| 552 | // Convert local time in struct to POSIX time as if it were a UTC time. |
| 553 | time_t local_posix_time = _mkgmtime(&posix_local_time_struct); |
| 554 | Time localtime(1000.0 * local_posix_time); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 555 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 556 | return localtime.Diff(&rounded_to_second); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | |
| 560 | // Return whether or not daylight savings time is in effect at this time. |
| 561 | bool Time::InDST() { |
| 562 | // Initialize timezone information, if needed. |
| 563 | TzSet(); |
| 564 | |
| 565 | // Determine if DST is in effect at the specified time. |
| 566 | bool in_dst = false; |
| 567 | if (tzinfo_.StandardDate.wMonth != 0 || tzinfo_.DaylightDate.wMonth != 0) { |
| 568 | // Get the local timezone offset for the timestamp in milliseconds. |
| 569 | int64_t offset = LocalOffset(); |
| 570 | |
| 571 | // Compute the offset for DST. The bias parameters in the timezone info |
| 572 | // are specified in minutes. These must be converted to milliseconds. |
| 573 | int64_t dstofs = -(tzinfo_.Bias + tzinfo_.DaylightBias) * kMsPerMinute; |
| 574 | |
| 575 | // If the local time offset equals the timezone bias plus the daylight |
| 576 | // bias then DST is in effect. |
| 577 | in_dst = offset == dstofs; |
| 578 | } |
| 579 | |
| 580 | return in_dst; |
| 581 | } |
| 582 | |
| 583 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 584 | // Return the daylight savings time offset for this time. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 585 | int64_t Time::DaylightSavingsOffset() { |
| 586 | return InDST() ? 60 * kMsPerMinute : 0; |
| 587 | } |
| 588 | |
| 589 | |
| 590 | // Returns a string identifying the current timezone for the |
| 591 | // timestamp taking into account daylight saving. |
| 592 | char* Time::LocalTimezone() { |
| 593 | // Return the standard or DST time zone name based on whether daylight |
| 594 | // saving is in effect at the given time. |
| 595 | return InDST() ? dst_tz_name_ : std_tz_name_; |
| 596 | } |
| 597 | |
| 598 | |
| 599 | void OS::Setup() { |
| 600 | // Seed the random number generator. |
ager@chromium.org | ef7cd1f | 2010-11-29 14:33:17 +0000 | [diff] [blame] | 601 | // Convert the current time to a 64-bit integer first, before converting it |
| 602 | // to an unsigned. Going directly can cause an overflow and the seed to be |
| 603 | // set to all ones. The seed will be identical for different instances that |
| 604 | // call this setup code within the same millisecond. |
| 605 | uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis()); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 606 | srand(static_cast<unsigned int>(seed)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 607 | limit_mutex = CreateMutex(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | |
| 611 | // Returns the accumulated user time for thread. |
| 612 | int OS::GetUserTime(uint32_t* secs, uint32_t* usecs) { |
| 613 | FILETIME dummy; |
| 614 | uint64_t usertime; |
| 615 | |
| 616 | // Get the amount of time that the thread has executed in user mode. |
| 617 | if (!GetThreadTimes(GetCurrentThread(), &dummy, &dummy, &dummy, |
| 618 | reinterpret_cast<FILETIME*>(&usertime))) return -1; |
| 619 | |
| 620 | // Adjust the resolution to micro-seconds. |
| 621 | usertime /= 10; |
| 622 | |
| 623 | // Convert to seconds and microseconds |
| 624 | *secs = static_cast<uint32_t>(usertime / 1000000); |
| 625 | *usecs = static_cast<uint32_t>(usertime % 1000000); |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | |
| 630 | // Returns current time as the number of milliseconds since |
| 631 | // 00:00:00 UTC, January 1, 1970. |
| 632 | double OS::TimeCurrentMillis() { |
| 633 | Time t; |
| 634 | t.SetToCurrentTime(); |
| 635 | return t.ToJSTime(); |
| 636 | } |
| 637 | |
| 638 | // Returns the tickcounter based on timeGetTime. |
| 639 | int64_t OS::Ticks() { |
| 640 | return timeGetTime() * 1000; // Convert to microseconds. |
| 641 | } |
| 642 | |
| 643 | |
| 644 | // Returns a string identifying the current timezone taking into |
| 645 | // account daylight saving. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 646 | const char* OS::LocalTimezone(double time) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 647 | return Time(time).LocalTimezone(); |
| 648 | } |
| 649 | |
| 650 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 651 | // Returns the local time offset in milliseconds east of UTC without |
| 652 | // taking daylight savings time into account. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 653 | double OS::LocalTimeOffset() { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 654 | // Use current time, rounded to the millisecond. |
| 655 | Time t(TimeCurrentMillis()); |
| 656 | // Time::LocalOffset inlcudes any daylight savings offset, so subtract it. |
| 657 | return static_cast<double>(t.LocalOffset() - t.DaylightSavingsOffset()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | |
| 661 | // Returns the daylight savings offset in milliseconds for the given |
| 662 | // time. |
| 663 | double OS::DaylightSavingsOffset(double time) { |
| 664 | int64_t offset = Time(time).DaylightSavingsOffset(); |
| 665 | return static_cast<double>(offset); |
| 666 | } |
| 667 | |
| 668 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 669 | int OS::GetLastError() { |
| 670 | return ::GetLastError(); |
| 671 | } |
| 672 | |
| 673 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 674 | // ---------------------------------------------------------------------------- |
| 675 | // Win32 console output. |
| 676 | // |
| 677 | // If a Win32 application is linked as a console application it has a normal |
| 678 | // standard output and standard error. In this case normal printf works fine |
| 679 | // for output. However, if the application is linked as a GUI application, |
| 680 | // the process doesn't have a console, and therefore (debugging) output is lost. |
| 681 | // This is the case if we are embedded in a windows program (like a browser). |
| 682 | // In order to be able to get debug output in this case the the debugging |
| 683 | // facility using OutputDebugString. This output goes to the active debugger |
| 684 | // for the process (if any). Else the output can be monitored using DBMON.EXE. |
| 685 | |
| 686 | enum OutputMode { |
| 687 | UNKNOWN, // Output method has not yet been determined. |
| 688 | CONSOLE, // Output is written to stdout. |
| 689 | ODS // Output is written to debug facility. |
| 690 | }; |
| 691 | |
| 692 | static OutputMode output_mode = UNKNOWN; // Current output mode. |
| 693 | |
| 694 | |
| 695 | // Determine if the process has a console for output. |
| 696 | static bool HasConsole() { |
| 697 | // Only check the first time. Eventual race conditions are not a problem, |
| 698 | // because all threads will eventually determine the same mode. |
| 699 | if (output_mode == UNKNOWN) { |
| 700 | // We cannot just check that the standard output is attached to a console |
| 701 | // because this would fail if output is redirected to a file. Therefore we |
| 702 | // say that a process does not have an output console if either the |
| 703 | // standard output handle is invalid or its file type is unknown. |
| 704 | if (GetStdHandle(STD_OUTPUT_HANDLE) != INVALID_HANDLE_VALUE && |
| 705 | GetFileType(GetStdHandle(STD_OUTPUT_HANDLE)) != FILE_TYPE_UNKNOWN) |
| 706 | output_mode = CONSOLE; |
| 707 | else |
| 708 | output_mode = ODS; |
| 709 | } |
| 710 | return output_mode == CONSOLE; |
| 711 | } |
| 712 | |
| 713 | |
| 714 | static void VPrintHelper(FILE* stream, const char* format, va_list args) { |
| 715 | if (HasConsole()) { |
| 716 | vfprintf(stream, format, args); |
| 717 | } else { |
| 718 | // It is important to use safe print here in order to avoid |
| 719 | // overflowing the buffer. We might truncate the output, but this |
| 720 | // does not crash. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 721 | EmbeddedVector<char, 4096> buffer; |
| 722 | OS::VSNPrintF(buffer, format, args); |
| 723 | OutputDebugStringA(buffer.start()); |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | |
| 728 | FILE* OS::FOpen(const char* path, const char* mode) { |
| 729 | FILE* result; |
| 730 | if (fopen_s(&result, path, mode) == 0) { |
| 731 | return result; |
| 732 | } else { |
| 733 | return NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 734 | } |
| 735 | } |
| 736 | |
| 737 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 738 | bool OS::Remove(const char* path) { |
| 739 | return (DeleteFileA(path) != 0); |
| 740 | } |
| 741 | |
| 742 | |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 743 | FILE* OS::OpenTemporaryFile() { |
| 744 | // tmpfile_s tries to use the root dir, don't use it. |
| 745 | char tempPathBuffer[MAX_PATH]; |
| 746 | DWORD path_result = 0; |
| 747 | path_result = GetTempPathA(MAX_PATH, tempPathBuffer); |
| 748 | if (path_result > MAX_PATH || path_result == 0) return NULL; |
| 749 | UINT name_result = 0; |
| 750 | char tempNameBuffer[MAX_PATH]; |
| 751 | name_result = GetTempFileNameA(tempPathBuffer, "", 0, tempNameBuffer); |
| 752 | if (name_result == 0) return NULL; |
| 753 | FILE* result = FOpen(tempNameBuffer, "w+"); // Same mode as tmpfile uses. |
| 754 | if (result != NULL) { |
| 755 | Remove(tempNameBuffer); // Delete on close. |
| 756 | } |
| 757 | return result; |
| 758 | } |
| 759 | |
| 760 | |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 761 | // Open log file in binary mode to avoid /n -> /r/n conversion. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 762 | const char* const OS::LogFileOpenMode = "wb"; |
ager@chromium.org | 71daaf6 | 2009-04-01 07:22:49 +0000 | [diff] [blame] | 763 | |
| 764 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 765 | // Print (debug) message to console. |
| 766 | void OS::Print(const char* format, ...) { |
| 767 | va_list args; |
| 768 | va_start(args, format); |
| 769 | VPrint(format, args); |
| 770 | va_end(args); |
| 771 | } |
| 772 | |
| 773 | |
| 774 | void OS::VPrint(const char* format, va_list args) { |
| 775 | VPrintHelper(stdout, format, args); |
| 776 | } |
| 777 | |
| 778 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 779 | void OS::FPrint(FILE* out, const char* format, ...) { |
| 780 | va_list args; |
| 781 | va_start(args, format); |
| 782 | VFPrint(out, format, args); |
| 783 | va_end(args); |
| 784 | } |
| 785 | |
| 786 | |
| 787 | void OS::VFPrint(FILE* out, const char* format, va_list args) { |
| 788 | VPrintHelper(out, format, args); |
| 789 | } |
| 790 | |
| 791 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 792 | // Print error message to console. |
| 793 | void OS::PrintError(const char* format, ...) { |
| 794 | va_list args; |
| 795 | va_start(args, format); |
| 796 | VPrintError(format, args); |
| 797 | va_end(args); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | void OS::VPrintError(const char* format, va_list args) { |
| 802 | VPrintHelper(stderr, format, args); |
| 803 | } |
| 804 | |
| 805 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 806 | int OS::SNPrintF(Vector<char> str, const char* format, ...) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 807 | va_list args; |
| 808 | va_start(args, format); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 809 | int result = VSNPrintF(str, format, args); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 810 | va_end(args); |
| 811 | return result; |
| 812 | } |
| 813 | |
| 814 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 815 | int OS::VSNPrintF(Vector<char> str, const char* format, va_list args) { |
| 816 | int n = _vsnprintf_s(str.start(), str.length(), _TRUNCATE, format, args); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 817 | // Make sure to zero-terminate the string if the output was |
| 818 | // truncated or if there was an error. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 819 | if (n < 0 || n >= str.length()) { |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 820 | if (str.length() > 0) |
| 821 | str[str.length() - 1] = '\0'; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 822 | return -1; |
| 823 | } else { |
| 824 | return n; |
| 825 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 829 | char* OS::StrChr(char* str, int c) { |
| 830 | return const_cast<char*>(strchr(str, c)); |
| 831 | } |
| 832 | |
| 833 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 834 | void OS::StrNCpy(Vector<char> dest, const char* src, size_t n) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 835 | // Use _TRUNCATE or strncpy_s crashes (by design) if buffer is too small. |
| 836 | size_t buffer_size = static_cast<size_t>(dest.length()); |
| 837 | if (n + 1 > buffer_size) // count for trailing '\0' |
| 838 | n = _TRUNCATE; |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 839 | int result = strncpy_s(dest.start(), dest.length(), src, n); |
| 840 | USE(result); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 841 | ASSERT(result == 0 || (n == _TRUNCATE && result == STRUNCATE)); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 845 | // We keep the lowest and highest addresses mapped as a quick way of |
| 846 | // determining that pointers are outside the heap (used mostly in assertions |
| 847 | // and verification). The estimate is conservative, ie, not all addresses in |
| 848 | // 'allocated' space are actually allocated to our heap. The range is |
| 849 | // [lowest, highest), inclusive on the low and and exclusive on the high end. |
| 850 | static void* lowest_ever_allocated = reinterpret_cast<void*>(-1); |
| 851 | static void* highest_ever_allocated = reinterpret_cast<void*>(0); |
| 852 | |
| 853 | |
| 854 | static void UpdateAllocatedSpaceLimits(void* address, int size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 855 | ASSERT(limit_mutex != NULL); |
| 856 | ScopedLock lock(limit_mutex); |
| 857 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 858 | lowest_ever_allocated = Min(lowest_ever_allocated, address); |
| 859 | highest_ever_allocated = |
| 860 | Max(highest_ever_allocated, |
| 861 | reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
| 862 | } |
| 863 | |
| 864 | |
| 865 | bool OS::IsOutsideAllocatedSpace(void* pointer) { |
| 866 | if (pointer < lowest_ever_allocated || pointer >= highest_ever_allocated) |
| 867 | return true; |
| 868 | // Ask the Windows API |
| 869 | if (IsBadWritePtr(pointer, 1)) |
| 870 | return true; |
| 871 | return false; |
| 872 | } |
| 873 | |
| 874 | |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 875 | // Get the system's page size used by VirtualAlloc() or the next power |
| 876 | // of two. The reason for always returning a power of two is that the |
| 877 | // rounding up in OS::Allocate expects that. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 878 | static size_t GetPageSize() { |
| 879 | static size_t page_size = 0; |
| 880 | if (page_size == 0) { |
| 881 | SYSTEM_INFO info; |
| 882 | GetSystemInfo(&info); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 883 | page_size = RoundUpToPowerOf2(info.dwPageSize); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 884 | } |
| 885 | return page_size; |
| 886 | } |
| 887 | |
| 888 | |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 889 | // The allocation alignment is the guaranteed alignment for |
| 890 | // VirtualAlloc'ed blocks of memory. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 891 | size_t OS::AllocateAlignment() { |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 892 | static size_t allocate_alignment = 0; |
| 893 | if (allocate_alignment == 0) { |
| 894 | SYSTEM_INFO info; |
| 895 | GetSystemInfo(&info); |
| 896 | allocate_alignment = info.dwAllocationGranularity; |
| 897 | } |
| 898 | return allocate_alignment; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 902 | void* OS::Allocate(const size_t requested, |
| 903 | size_t* allocated, |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 904 | bool is_executable) { |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 905 | // The address range used to randomize RWX allocations in OS::Allocate |
| 906 | // Try not to map pages into the default range that windows loads DLLs |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 907 | // Use a multiple of 64k to prevent committing unused memory. |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 908 | // Note: This does not guarantee RWX regions will be within the |
| 909 | // range kAllocationRandomAddressMin to kAllocationRandomAddressMax |
| 910 | #ifdef V8_HOST_ARCH_64_BIT |
| 911 | static const intptr_t kAllocationRandomAddressMin = 0x0000000080000000; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 912 | static const intptr_t kAllocationRandomAddressMax = 0x000003FFFFFF0000; |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 913 | #else |
| 914 | static const intptr_t kAllocationRandomAddressMin = 0x04000000; |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 915 | static const intptr_t kAllocationRandomAddressMax = 0x3FFF0000; |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 916 | #endif |
| 917 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 918 | // VirtualAlloc rounds allocated size to page size automatically. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 919 | size_t msize = RoundUp(requested, static_cast<int>(GetPageSize())); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 920 | intptr_t address = 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 921 | |
| 922 | // Windows XP SP2 allows Data Excution Prevention (DEP). |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 923 | int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 924 | |
| 925 | // For exectutable pages try and randomize the allocation address |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 926 | if (prot == PAGE_EXECUTE_READWRITE && |
| 927 | msize >= static_cast<size_t>(Page::kPageSize)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 928 | address = (V8::RandomPrivate(Isolate::Current()) << kPageSizeBits) |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 929 | | kAllocationRandomAddressMin; |
| 930 | address &= kAllocationRandomAddressMax; |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 931 | } |
| 932 | |
| 933 | LPVOID mbase = VirtualAlloc(reinterpret_cast<void *>(address), |
| 934 | msize, |
| 935 | MEM_COMMIT | MEM_RESERVE, |
| 936 | prot); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 937 | if (mbase == NULL && address != 0) |
sgjesse@chromium.org | c3a0197 | 2010-08-04 09:46:24 +0000 | [diff] [blame] | 938 | mbase = VirtualAlloc(NULL, msize, MEM_COMMIT | MEM_RESERVE, prot); |
| 939 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 940 | if (mbase == NULL) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 941 | LOG(ISOLATE, StringEvent("OS::Allocate", "VirtualAlloc failed")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 942 | return NULL; |
| 943 | } |
| 944 | |
| 945 | ASSERT(IsAligned(reinterpret_cast<size_t>(mbase), OS::AllocateAlignment())); |
| 946 | |
| 947 | *allocated = msize; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 948 | UpdateAllocatedSpaceLimits(mbase, static_cast<int>(msize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 949 | return mbase; |
| 950 | } |
| 951 | |
| 952 | |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 953 | void OS::Free(void* address, const size_t size) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 954 | // TODO(1240712): VirtualFree has a return value which is ignored here. |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 955 | VirtualFree(address, 0, MEM_RELEASE); |
| 956 | USE(size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 957 | } |
| 958 | |
| 959 | |
lrn@chromium.org | d4e9e22 | 2011-08-03 12:01:58 +0000 | [diff] [blame] | 960 | void OS::ProtectCode(void* address, const size_t size) { |
| 961 | DWORD old_protect; |
| 962 | VirtualProtect(address, size, PAGE_EXECUTE_READ, &old_protect); |
| 963 | } |
| 964 | |
| 965 | |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 966 | void OS::Guard(void* address, const size_t size) { |
| 967 | DWORD oldprotect; |
| 968 | VirtualProtect(address, size, PAGE_READONLY | PAGE_GUARD, &oldprotect); |
| 969 | } |
| 970 | |
| 971 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 972 | void OS::Sleep(int milliseconds) { |
| 973 | ::Sleep(milliseconds); |
| 974 | } |
| 975 | |
| 976 | |
| 977 | void OS::Abort() { |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 978 | if (!IsDebuggerPresent()) { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 979 | #ifdef _MSC_VER |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 980 | // Make the MSVCRT do a silent abort. |
| 981 | _set_abort_behavior(0, _WRITE_ABORT_MSG); |
| 982 | _set_abort_behavior(0, _CALL_REPORTFAULT); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 983 | #endif // _MSC_VER |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame] | 984 | abort(); |
| 985 | } else { |
| 986 | DebugBreak(); |
| 987 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 991 | void OS::DebugBreak() { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 992 | #ifdef _MSC_VER |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 993 | __debugbreak(); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 994 | #else |
| 995 | ::DebugBreak(); |
| 996 | #endif |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1000 | class Win32MemoryMappedFile : public OS::MemoryMappedFile { |
| 1001 | public: |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1002 | Win32MemoryMappedFile(HANDLE file, |
| 1003 | HANDLE file_mapping, |
| 1004 | void* memory, |
| 1005 | int size) |
| 1006 | : file_(file), |
| 1007 | file_mapping_(file_mapping), |
| 1008 | memory_(memory), |
| 1009 | size_(size) { } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1010 | virtual ~Win32MemoryMappedFile(); |
| 1011 | virtual void* memory() { return memory_; } |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1012 | virtual int size() { return size_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1013 | private: |
| 1014 | HANDLE file_; |
| 1015 | HANDLE file_mapping_; |
| 1016 | void* memory_; |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1017 | int size_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1018 | }; |
| 1019 | |
| 1020 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1021 | OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) { |
| 1022 | // Open a physical file |
| 1023 | HANDLE file = CreateFileA(name, GENERIC_READ | GENERIC_WRITE, |
| 1024 | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 1025 | if (file == INVALID_HANDLE_VALUE) return NULL; |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1026 | |
| 1027 | int size = static_cast<int>(GetFileSize(file, NULL)); |
| 1028 | |
| 1029 | // Create a file mapping for the physical file |
| 1030 | HANDLE file_mapping = CreateFileMapping(file, NULL, |
| 1031 | PAGE_READWRITE, 0, static_cast<DWORD>(size), NULL); |
| 1032 | if (file_mapping == NULL) return NULL; |
| 1033 | |
| 1034 | // Map a view of the file into memory |
| 1035 | void* memory = MapViewOfFile(file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size); |
| 1036 | return new Win32MemoryMappedFile(file, file_mapping, memory, size); |
| 1037 | } |
| 1038 | |
| 1039 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1040 | OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size, |
| 1041 | void* initial) { |
| 1042 | // Open a physical file |
| 1043 | HANDLE file = CreateFileA(name, GENERIC_READ | GENERIC_WRITE, |
| 1044 | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, 0, NULL); |
| 1045 | if (file == NULL) return NULL; |
| 1046 | // Create a file mapping for the physical file |
| 1047 | HANDLE file_mapping = CreateFileMapping(file, NULL, |
| 1048 | PAGE_READWRITE, 0, static_cast<DWORD>(size), NULL); |
| 1049 | if (file_mapping == NULL) return NULL; |
| 1050 | // Map a view of the file into memory |
| 1051 | void* memory = MapViewOfFile(file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size); |
| 1052 | if (memory) memmove(memory, initial, size); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1053 | return new Win32MemoryMappedFile(file, file_mapping, memory, size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | |
| 1057 | Win32MemoryMappedFile::~Win32MemoryMappedFile() { |
| 1058 | if (memory_ != NULL) |
| 1059 | UnmapViewOfFile(memory_); |
| 1060 | CloseHandle(file_mapping_); |
| 1061 | CloseHandle(file_); |
| 1062 | } |
| 1063 | |
| 1064 | |
| 1065 | // The following code loads functions defined in DbhHelp.h and TlHelp32.h |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1066 | // dynamically. This is to avoid being depending on dbghelp.dll and |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1067 | // tlhelp32.dll when running (the functions in tlhelp32.dll have been moved to |
| 1068 | // kernel32.dll at some point so loading functions defines in TlHelp32.h |
| 1069 | // dynamically might not be necessary any more - for some versions of Windows?). |
| 1070 | |
| 1071 | // Function pointers to functions dynamically loaded from dbghelp.dll. |
| 1072 | #define DBGHELP_FUNCTION_LIST(V) \ |
| 1073 | V(SymInitialize) \ |
| 1074 | V(SymGetOptions) \ |
| 1075 | V(SymSetOptions) \ |
| 1076 | V(SymGetSearchPath) \ |
| 1077 | V(SymLoadModule64) \ |
| 1078 | V(StackWalk64) \ |
| 1079 | V(SymGetSymFromAddr64) \ |
| 1080 | V(SymGetLineFromAddr64) \ |
| 1081 | V(SymFunctionTableAccess64) \ |
| 1082 | V(SymGetModuleBase64) |
| 1083 | |
| 1084 | // Function pointers to functions dynamically loaded from dbghelp.dll. |
| 1085 | #define TLHELP32_FUNCTION_LIST(V) \ |
| 1086 | V(CreateToolhelp32Snapshot) \ |
| 1087 | V(Module32FirstW) \ |
| 1088 | V(Module32NextW) |
| 1089 | |
| 1090 | // Define the decoration to use for the type and variable name used for |
| 1091 | // dynamically loaded DLL function.. |
| 1092 | #define DLL_FUNC_TYPE(name) _##name##_ |
| 1093 | #define DLL_FUNC_VAR(name) _##name |
| 1094 | |
| 1095 | // Define the type for each dynamically loaded DLL function. The function |
| 1096 | // definitions are copied from DbgHelp.h and TlHelp32.h. The IN and VOID macros |
| 1097 | // from the Windows include files are redefined here to have the function |
| 1098 | // definitions to be as close to the ones in the original .h files as possible. |
| 1099 | #ifndef IN |
| 1100 | #define IN |
| 1101 | #endif |
| 1102 | #ifndef VOID |
| 1103 | #define VOID void |
| 1104 | #endif |
| 1105 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1106 | // DbgHelp isn't supported on MinGW yet |
| 1107 | #ifndef __MINGW32__ |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1108 | // DbgHelp.h functions. |
| 1109 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymInitialize))(IN HANDLE hProcess, |
| 1110 | IN PSTR UserSearchPath, |
| 1111 | IN BOOL fInvadeProcess); |
| 1112 | typedef DWORD (__stdcall *DLL_FUNC_TYPE(SymGetOptions))(VOID); |
| 1113 | typedef DWORD (__stdcall *DLL_FUNC_TYPE(SymSetOptions))(IN DWORD SymOptions); |
| 1114 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetSearchPath))( |
| 1115 | IN HANDLE hProcess, |
| 1116 | OUT PSTR SearchPath, |
| 1117 | IN DWORD SearchPathLength); |
| 1118 | typedef DWORD64 (__stdcall *DLL_FUNC_TYPE(SymLoadModule64))( |
| 1119 | IN HANDLE hProcess, |
| 1120 | IN HANDLE hFile, |
| 1121 | IN PSTR ImageName, |
| 1122 | IN PSTR ModuleName, |
| 1123 | IN DWORD64 BaseOfDll, |
| 1124 | IN DWORD SizeOfDll); |
| 1125 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(StackWalk64))( |
| 1126 | DWORD MachineType, |
| 1127 | HANDLE hProcess, |
| 1128 | HANDLE hThread, |
| 1129 | LPSTACKFRAME64 StackFrame, |
| 1130 | PVOID ContextRecord, |
| 1131 | PREAD_PROCESS_MEMORY_ROUTINE64 ReadMemoryRoutine, |
| 1132 | PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine, |
| 1133 | PGET_MODULE_BASE_ROUTINE64 GetModuleBaseRoutine, |
| 1134 | PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress); |
| 1135 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetSymFromAddr64))( |
| 1136 | IN HANDLE hProcess, |
| 1137 | IN DWORD64 qwAddr, |
| 1138 | OUT PDWORD64 pdwDisplacement, |
| 1139 | OUT PIMAGEHLP_SYMBOL64 Symbol); |
| 1140 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetLineFromAddr64))( |
| 1141 | IN HANDLE hProcess, |
| 1142 | IN DWORD64 qwAddr, |
| 1143 | OUT PDWORD pdwDisplacement, |
| 1144 | OUT PIMAGEHLP_LINE64 Line64); |
| 1145 | // DbgHelp.h typedefs. Implementation found in dbghelp.dll. |
| 1146 | typedef PVOID (__stdcall *DLL_FUNC_TYPE(SymFunctionTableAccess64))( |
| 1147 | HANDLE hProcess, |
| 1148 | DWORD64 AddrBase); // DbgHelp.h typedef PFUNCTION_TABLE_ACCESS_ROUTINE64 |
| 1149 | typedef DWORD64 (__stdcall *DLL_FUNC_TYPE(SymGetModuleBase64))( |
| 1150 | HANDLE hProcess, |
| 1151 | DWORD64 AddrBase); // DbgHelp.h typedef PGET_MODULE_BASE_ROUTINE64 |
| 1152 | |
| 1153 | // TlHelp32.h functions. |
| 1154 | typedef HANDLE (__stdcall *DLL_FUNC_TYPE(CreateToolhelp32Snapshot))( |
| 1155 | DWORD dwFlags, |
| 1156 | DWORD th32ProcessID); |
| 1157 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(Module32FirstW))(HANDLE hSnapshot, |
| 1158 | LPMODULEENTRY32W lpme); |
| 1159 | typedef BOOL (__stdcall *DLL_FUNC_TYPE(Module32NextW))(HANDLE hSnapshot, |
| 1160 | LPMODULEENTRY32W lpme); |
| 1161 | |
| 1162 | #undef IN |
| 1163 | #undef VOID |
| 1164 | |
| 1165 | // Declare a variable for each dynamically loaded DLL function. |
| 1166 | #define DEF_DLL_FUNCTION(name) DLL_FUNC_TYPE(name) DLL_FUNC_VAR(name) = NULL; |
| 1167 | DBGHELP_FUNCTION_LIST(DEF_DLL_FUNCTION) |
| 1168 | TLHELP32_FUNCTION_LIST(DEF_DLL_FUNCTION) |
| 1169 | #undef DEF_DLL_FUNCTION |
| 1170 | |
| 1171 | // Load the functions. This function has a lot of "ugly" macros in order to |
| 1172 | // keep down code duplication. |
| 1173 | |
| 1174 | static bool LoadDbgHelpAndTlHelp32() { |
| 1175 | static bool dbghelp_loaded = false; |
| 1176 | |
| 1177 | if (dbghelp_loaded) return true; |
| 1178 | |
| 1179 | HMODULE module; |
| 1180 | |
| 1181 | // Load functions from the dbghelp.dll module. |
| 1182 | module = LoadLibrary(TEXT("dbghelp.dll")); |
| 1183 | if (module == NULL) { |
| 1184 | return false; |
| 1185 | } |
| 1186 | |
| 1187 | #define LOAD_DLL_FUNC(name) \ |
| 1188 | DLL_FUNC_VAR(name) = \ |
| 1189 | reinterpret_cast<DLL_FUNC_TYPE(name)>(GetProcAddress(module, #name)); |
| 1190 | |
| 1191 | DBGHELP_FUNCTION_LIST(LOAD_DLL_FUNC) |
| 1192 | |
| 1193 | #undef LOAD_DLL_FUNC |
| 1194 | |
| 1195 | // Load functions from the kernel32.dll module (the TlHelp32.h function used |
| 1196 | // to be in tlhelp32.dll but are now moved to kernel32.dll). |
| 1197 | module = LoadLibrary(TEXT("kernel32.dll")); |
| 1198 | if (module == NULL) { |
| 1199 | return false; |
| 1200 | } |
| 1201 | |
| 1202 | #define LOAD_DLL_FUNC(name) \ |
| 1203 | DLL_FUNC_VAR(name) = \ |
| 1204 | reinterpret_cast<DLL_FUNC_TYPE(name)>(GetProcAddress(module, #name)); |
| 1205 | |
| 1206 | TLHELP32_FUNCTION_LIST(LOAD_DLL_FUNC) |
| 1207 | |
| 1208 | #undef LOAD_DLL_FUNC |
| 1209 | |
| 1210 | // Check that all functions where loaded. |
| 1211 | bool result = |
| 1212 | #define DLL_FUNC_LOADED(name) (DLL_FUNC_VAR(name) != NULL) && |
| 1213 | |
| 1214 | DBGHELP_FUNCTION_LIST(DLL_FUNC_LOADED) |
| 1215 | TLHELP32_FUNCTION_LIST(DLL_FUNC_LOADED) |
| 1216 | |
| 1217 | #undef DLL_FUNC_LOADED |
| 1218 | true; |
| 1219 | |
| 1220 | dbghelp_loaded = result; |
| 1221 | return result; |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 1222 | // NOTE: The modules are never unloaded and will stay around until the |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1223 | // application is closed. |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | // Load the symbols for generating stack traces. |
| 1228 | static bool LoadSymbols(HANDLE process_handle) { |
| 1229 | static bool symbols_loaded = false; |
| 1230 | |
| 1231 | if (symbols_loaded) return true; |
| 1232 | |
| 1233 | BOOL ok; |
| 1234 | |
| 1235 | // Initialize the symbol engine. |
| 1236 | ok = _SymInitialize(process_handle, // hProcess |
| 1237 | NULL, // UserSearchPath |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1238 | false); // fInvadeProcess |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1239 | if (!ok) return false; |
| 1240 | |
| 1241 | DWORD options = _SymGetOptions(); |
| 1242 | options |= SYMOPT_LOAD_LINES; |
| 1243 | options |= SYMOPT_FAIL_CRITICAL_ERRORS; |
| 1244 | options = _SymSetOptions(options); |
| 1245 | |
| 1246 | char buf[OS::kStackWalkMaxNameLen] = {0}; |
| 1247 | ok = _SymGetSearchPath(process_handle, buf, OS::kStackWalkMaxNameLen); |
| 1248 | if (!ok) { |
| 1249 | int err = GetLastError(); |
| 1250 | PrintF("%d\n", err); |
| 1251 | return false; |
| 1252 | } |
| 1253 | |
| 1254 | HANDLE snapshot = _CreateToolhelp32Snapshot( |
| 1255 | TH32CS_SNAPMODULE, // dwFlags |
| 1256 | GetCurrentProcessId()); // th32ProcessId |
| 1257 | if (snapshot == INVALID_HANDLE_VALUE) return false; |
| 1258 | MODULEENTRY32W module_entry; |
| 1259 | module_entry.dwSize = sizeof(module_entry); // Set the size of the structure. |
| 1260 | BOOL cont = _Module32FirstW(snapshot, &module_entry); |
| 1261 | while (cont) { |
| 1262 | DWORD64 base; |
| 1263 | // NOTE the SymLoadModule64 function has the peculiarity of accepting a |
| 1264 | // both unicode and ASCII strings even though the parameter is PSTR. |
| 1265 | base = _SymLoadModule64( |
| 1266 | process_handle, // hProcess |
| 1267 | 0, // hFile |
| 1268 | reinterpret_cast<PSTR>(module_entry.szExePath), // ImageName |
| 1269 | reinterpret_cast<PSTR>(module_entry.szModule), // ModuleName |
| 1270 | reinterpret_cast<DWORD64>(module_entry.modBaseAddr), // BaseOfDll |
| 1271 | module_entry.modBaseSize); // SizeOfDll |
| 1272 | if (base == 0) { |
| 1273 | int err = GetLastError(); |
| 1274 | if (err != ERROR_MOD_NOT_FOUND && |
| 1275 | err != ERROR_INVALID_HANDLE) return false; |
| 1276 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1277 | LOG(i::Isolate::Current(), |
| 1278 | SharedLibraryEvent( |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1279 | module_entry.szExePath, |
| 1280 | reinterpret_cast<unsigned int>(module_entry.modBaseAddr), |
| 1281 | reinterpret_cast<unsigned int>(module_entry.modBaseAddr + |
| 1282 | module_entry.modBaseSize))); |
| 1283 | cont = _Module32NextW(snapshot, &module_entry); |
| 1284 | } |
| 1285 | CloseHandle(snapshot); |
| 1286 | |
| 1287 | symbols_loaded = true; |
| 1288 | return true; |
| 1289 | } |
| 1290 | |
| 1291 | |
| 1292 | void OS::LogSharedLibraryAddresses() { |
| 1293 | // SharedLibraryEvents are logged when loading symbol information. |
| 1294 | // Only the shared libraries loaded at the time of the call to |
| 1295 | // LogSharedLibraryAddresses are logged. DLLs loaded after |
| 1296 | // initialization are not accounted for. |
| 1297 | if (!LoadDbgHelpAndTlHelp32()) return; |
| 1298 | HANDLE process_handle = GetCurrentProcess(); |
| 1299 | LoadSymbols(process_handle); |
| 1300 | } |
| 1301 | |
| 1302 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 1303 | void OS::SignalCodeMovingGC() { |
| 1304 | } |
| 1305 | |
| 1306 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1307 | // Walk the stack using the facilities in dbghelp.dll and tlhelp32.dll |
| 1308 | |
| 1309 | // Switch off warning 4748 (/GS can not protect parameters and local variables |
| 1310 | // from local buffer overrun because optimizations are disabled in function) as |
| 1311 | // it is triggered by the use of inline assembler. |
| 1312 | #pragma warning(push) |
| 1313 | #pragma warning(disable : 4748) |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 1314 | int OS::StackWalk(Vector<OS::StackFrame> frames) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1315 | BOOL ok; |
| 1316 | |
| 1317 | // Load the required functions from DLL's. |
| 1318 | if (!LoadDbgHelpAndTlHelp32()) return kStackWalkError; |
| 1319 | |
| 1320 | // Get the process and thread handles. |
| 1321 | HANDLE process_handle = GetCurrentProcess(); |
| 1322 | HANDLE thread_handle = GetCurrentThread(); |
| 1323 | |
| 1324 | // Read the symbols. |
| 1325 | if (!LoadSymbols(process_handle)) return kStackWalkError; |
| 1326 | |
| 1327 | // Capture current context. |
| 1328 | CONTEXT context; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1329 | RtlCaptureContext(&context); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1330 | |
| 1331 | // Initialize the stack walking |
| 1332 | STACKFRAME64 stack_frame; |
| 1333 | memset(&stack_frame, 0, sizeof(stack_frame)); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 1334 | #ifdef _WIN64 |
| 1335 | stack_frame.AddrPC.Offset = context.Rip; |
| 1336 | stack_frame.AddrFrame.Offset = context.Rbp; |
| 1337 | stack_frame.AddrStack.Offset = context.Rsp; |
| 1338 | #else |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1339 | stack_frame.AddrPC.Offset = context.Eip; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1340 | stack_frame.AddrFrame.Offset = context.Ebp; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1341 | stack_frame.AddrStack.Offset = context.Esp; |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 1342 | #endif |
| 1343 | stack_frame.AddrPC.Mode = AddrModeFlat; |
| 1344 | stack_frame.AddrFrame.Mode = AddrModeFlat; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1345 | stack_frame.AddrStack.Mode = AddrModeFlat; |
| 1346 | int frames_count = 0; |
| 1347 | |
| 1348 | // Collect stack frames. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 1349 | int frames_size = frames.length(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1350 | while (frames_count < frames_size) { |
| 1351 | ok = _StackWalk64( |
| 1352 | IMAGE_FILE_MACHINE_I386, // MachineType |
| 1353 | process_handle, // hProcess |
| 1354 | thread_handle, // hThread |
| 1355 | &stack_frame, // StackFrame |
| 1356 | &context, // ContextRecord |
| 1357 | NULL, // ReadMemoryRoutine |
| 1358 | _SymFunctionTableAccess64, // FunctionTableAccessRoutine |
| 1359 | _SymGetModuleBase64, // GetModuleBaseRoutine |
| 1360 | NULL); // TranslateAddress |
| 1361 | if (!ok) break; |
| 1362 | |
| 1363 | // Store the address. |
| 1364 | ASSERT((stack_frame.AddrPC.Offset >> 32) == 0); // 32-bit address. |
| 1365 | frames[frames_count].address = |
| 1366 | reinterpret_cast<void*>(stack_frame.AddrPC.Offset); |
| 1367 | |
| 1368 | // Try to locate a symbol for this frame. |
| 1369 | DWORD64 symbol_displacement; |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1370 | SmartPointer<IMAGEHLP_SYMBOL64> symbol( |
| 1371 | NewArray<IMAGEHLP_SYMBOL64>(kStackWalkMaxNameLen)); |
| 1372 | if (symbol.is_empty()) return kStackWalkError; // Out of memory. |
| 1373 | memset(*symbol, 0, sizeof(IMAGEHLP_SYMBOL64) + kStackWalkMaxNameLen); |
| 1374 | (*symbol)->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64); |
| 1375 | (*symbol)->MaxNameLength = kStackWalkMaxNameLen; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1376 | ok = _SymGetSymFromAddr64(process_handle, // hProcess |
| 1377 | stack_frame.AddrPC.Offset, // Address |
| 1378 | &symbol_displacement, // Displacement |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1379 | *symbol); // Symbol |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1380 | if (ok) { |
| 1381 | // Try to locate more source information for the symbol. |
| 1382 | IMAGEHLP_LINE64 Line; |
| 1383 | memset(&Line, 0, sizeof(Line)); |
| 1384 | Line.SizeOfStruct = sizeof(Line); |
| 1385 | DWORD line_displacement; |
| 1386 | ok = _SymGetLineFromAddr64( |
| 1387 | process_handle, // hProcess |
| 1388 | stack_frame.AddrPC.Offset, // dwAddr |
| 1389 | &line_displacement, // pdwDisplacement |
| 1390 | &Line); // Line |
| 1391 | // Format a text representation of the frame based on the information |
| 1392 | // available. |
| 1393 | if (ok) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1394 | SNPrintF(MutableCStrVector(frames[frames_count].text, |
| 1395 | kStackWalkMaxTextLen), |
| 1396 | "%s %s:%d:%d", |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1397 | (*symbol)->Name, Line.FileName, Line.LineNumber, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1398 | line_displacement); |
| 1399 | } else { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1400 | SNPrintF(MutableCStrVector(frames[frames_count].text, |
| 1401 | kStackWalkMaxTextLen), |
| 1402 | "%s", |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1403 | (*symbol)->Name); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1404 | } |
| 1405 | // Make sure line termination is in place. |
| 1406 | frames[frames_count].text[kStackWalkMaxTextLen - 1] = '\0'; |
| 1407 | } else { |
| 1408 | // No text representation of this frame |
| 1409 | frames[frames_count].text[0] = '\0'; |
| 1410 | |
| 1411 | // Continue if we are just missing a module (for non C/C++ frames a |
| 1412 | // module will never be found). |
| 1413 | int err = GetLastError(); |
| 1414 | if (err != ERROR_MOD_NOT_FOUND) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1415 | break; |
| 1416 | } |
| 1417 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1418 | |
| 1419 | frames_count++; |
| 1420 | } |
| 1421 | |
| 1422 | // Return the number of frames filled in. |
| 1423 | return frames_count; |
| 1424 | } |
| 1425 | |
| 1426 | // Restore warnings to previous settings. |
| 1427 | #pragma warning(pop) |
| 1428 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1429 | #else // __MINGW32__ |
| 1430 | void OS::LogSharedLibraryAddresses() { } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1431 | void OS::SignalCodeMovingGC() { } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 1432 | int OS::StackWalk(Vector<OS::StackFrame> frames) { return 0; } |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1433 | #endif // __MINGW32__ |
| 1434 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1435 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1436 | uint64_t OS::CpuFeaturesImpliedByPlatform() { |
| 1437 | return 0; // Windows runs on anything. |
| 1438 | } |
| 1439 | |
| 1440 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1441 | double OS::nan_value() { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1442 | #ifdef _MSC_VER |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1443 | // Positive Quiet NaN with no payload (aka. Indeterminate) has all bits |
| 1444 | // in mask set, so value equals mask. |
| 1445 | static const __int64 nanval = kQuietNaNMask; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1446 | return *reinterpret_cast<const double*>(&nanval); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1447 | #else // _MSC_VER |
| 1448 | return NAN; |
| 1449 | #endif // _MSC_VER |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1450 | } |
| 1451 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1452 | |
| 1453 | int OS::ActivationFrameAlignment() { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1454 | #ifdef _WIN64 |
| 1455 | return 16; // Windows 64-bit ABI requires the stack to be 16-byte aligned. |
| 1456 | #else |
| 1457 | return 8; // Floating-point math runs faster with 8-byte alignment. |
| 1458 | #endif |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1462 | void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) { |
| 1463 | MemoryBarrier(); |
| 1464 | *ptr = value; |
| 1465 | } |
| 1466 | |
| 1467 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1468 | bool VirtualMemory::IsReserved() { |
| 1469 | return address_ != NULL; |
| 1470 | } |
| 1471 | |
| 1472 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1473 | VirtualMemory::VirtualMemory(size_t size) { |
| 1474 | address_ = VirtualAlloc(NULL, size, MEM_RESERVE, PAGE_NOACCESS); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1475 | size_ = size; |
| 1476 | } |
| 1477 | |
| 1478 | |
| 1479 | VirtualMemory::~VirtualMemory() { |
| 1480 | if (IsReserved()) { |
| 1481 | if (0 == VirtualFree(address(), 0, MEM_RELEASE)) address_ = NULL; |
| 1482 | } |
| 1483 | } |
| 1484 | |
| 1485 | |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 1486 | bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) { |
| 1487 | int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1488 | if (NULL == VirtualAlloc(address, size, MEM_COMMIT, prot)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1489 | return false; |
| 1490 | } |
| 1491 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1492 | UpdateAllocatedSpaceLimits(address, static_cast<int>(size)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1493 | return true; |
| 1494 | } |
| 1495 | |
| 1496 | |
| 1497 | bool VirtualMemory::Uncommit(void* address, size_t size) { |
| 1498 | ASSERT(IsReserved()); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1499 | return VirtualFree(address, size, MEM_DECOMMIT) != false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1500 | } |
| 1501 | |
| 1502 | |
| 1503 | // ---------------------------------------------------------------------------- |
| 1504 | // Win32 thread support. |
| 1505 | |
| 1506 | // Definition of invalid thread handle and id. |
| 1507 | static const HANDLE kNoThread = INVALID_HANDLE_VALUE; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1508 | |
| 1509 | // Entry point for threads. The supplied argument is a pointer to the thread |
| 1510 | // object. The entry function dispatches to the run method in the thread |
| 1511 | // object. It is important that this function has __stdcall calling |
| 1512 | // convention. |
| 1513 | static unsigned int __stdcall ThreadEntry(void* arg) { |
| 1514 | Thread* thread = reinterpret_cast<Thread*>(arg); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1515 | thread->Run(); |
| 1516 | return 0; |
| 1517 | } |
| 1518 | |
| 1519 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1520 | class Thread::PlatformData : public Malloced { |
| 1521 | public: |
| 1522 | explicit PlatformData(HANDLE thread) : thread_(thread) {} |
| 1523 | HANDLE thread_; |
| 1524 | }; |
| 1525 | |
| 1526 | |
| 1527 | // Initialize a Win32 thread object. The thread has an invalid thread |
| 1528 | // handle until it is started. |
| 1529 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1530 | Thread::Thread(const Options& options) |
| 1531 | : stack_size_(options.stack_size) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1532 | data_ = new PlatformData(kNoThread); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1533 | set_name(options.name); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1534 | } |
| 1535 | |
| 1536 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1537 | Thread::Thread(const char* name) |
| 1538 | : stack_size_(0) { |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1539 | data_ = new PlatformData(kNoThread); |
| 1540 | set_name(name); |
| 1541 | } |
| 1542 | |
| 1543 | |
| 1544 | void Thread::set_name(const char* name) { |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 1545 | OS::StrNCpy(Vector<char>(name_, sizeof(name_)), name, strlen(name)); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1546 | name_[sizeof(name_) - 1] = '\0'; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1547 | } |
| 1548 | |
| 1549 | |
| 1550 | // Close our own handle for the thread. |
| 1551 | Thread::~Thread() { |
| 1552 | if (data_->thread_ != kNoThread) CloseHandle(data_->thread_); |
| 1553 | delete data_; |
| 1554 | } |
| 1555 | |
| 1556 | |
| 1557 | // Create a new thread. It is important to use _beginthreadex() instead of |
| 1558 | // the Win32 function CreateThread(), because the CreateThread() does not |
| 1559 | // initialize thread specific structures in the C runtime library. |
| 1560 | void Thread::Start() { |
| 1561 | data_->thread_ = reinterpret_cast<HANDLE>( |
| 1562 | _beginthreadex(NULL, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1563 | static_cast<unsigned>(stack_size_), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1564 | ThreadEntry, |
| 1565 | this, |
| 1566 | 0, |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 1567 | NULL)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1568 | } |
| 1569 | |
| 1570 | |
| 1571 | // Wait for thread to terminate. |
| 1572 | void Thread::Join() { |
| 1573 | WaitForSingleObject(data_->thread_, INFINITE); |
| 1574 | } |
| 1575 | |
| 1576 | |
| 1577 | Thread::LocalStorageKey Thread::CreateThreadLocalKey() { |
| 1578 | DWORD result = TlsAlloc(); |
| 1579 | ASSERT(result != TLS_OUT_OF_INDEXES); |
| 1580 | return static_cast<LocalStorageKey>(result); |
| 1581 | } |
| 1582 | |
| 1583 | |
| 1584 | void Thread::DeleteThreadLocalKey(LocalStorageKey key) { |
| 1585 | BOOL result = TlsFree(static_cast<DWORD>(key)); |
| 1586 | USE(result); |
| 1587 | ASSERT(result); |
| 1588 | } |
| 1589 | |
| 1590 | |
| 1591 | void* Thread::GetThreadLocal(LocalStorageKey key) { |
| 1592 | return TlsGetValue(static_cast<DWORD>(key)); |
| 1593 | } |
| 1594 | |
| 1595 | |
| 1596 | void Thread::SetThreadLocal(LocalStorageKey key, void* value) { |
| 1597 | BOOL result = TlsSetValue(static_cast<DWORD>(key), value); |
| 1598 | USE(result); |
| 1599 | ASSERT(result); |
| 1600 | } |
| 1601 | |
| 1602 | |
| 1603 | |
| 1604 | void Thread::YieldCPU() { |
| 1605 | Sleep(0); |
| 1606 | } |
| 1607 | |
| 1608 | |
| 1609 | // ---------------------------------------------------------------------------- |
| 1610 | // Win32 mutex support. |
| 1611 | // |
| 1612 | // On Win32 mutexes are implemented using CRITICAL_SECTION objects. These are |
| 1613 | // faster than Win32 Mutex objects because they are implemented using user mode |
| 1614 | // atomic instructions. Therefore we only do ring transitions if there is lock |
| 1615 | // contention. |
| 1616 | |
| 1617 | class Win32Mutex : public Mutex { |
| 1618 | public: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1619 | Win32Mutex() { InitializeCriticalSection(&cs_); } |
| 1620 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1621 | virtual ~Win32Mutex() { DeleteCriticalSection(&cs_); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1622 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1623 | virtual int Lock() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1624 | EnterCriticalSection(&cs_); |
| 1625 | return 0; |
| 1626 | } |
| 1627 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1628 | virtual int Unlock() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1629 | LeaveCriticalSection(&cs_); |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1633 | |
| 1634 | virtual bool TryLock() { |
| 1635 | // Returns non-zero if critical section is entered successfully entered. |
| 1636 | return TryEnterCriticalSection(&cs_); |
| 1637 | } |
| 1638 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1639 | private: |
| 1640 | CRITICAL_SECTION cs_; // Critical section used for mutex |
| 1641 | }; |
| 1642 | |
| 1643 | |
| 1644 | Mutex* OS::CreateMutex() { |
| 1645 | return new Win32Mutex(); |
| 1646 | } |
| 1647 | |
| 1648 | |
| 1649 | // ---------------------------------------------------------------------------- |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1650 | // Win32 semaphore support. |
| 1651 | // |
| 1652 | // On Win32 semaphores are implemented using Win32 Semaphore objects. The |
| 1653 | // semaphores are anonymous. Also, the semaphores are initialized to have |
| 1654 | // no upper limit on count. |
| 1655 | |
| 1656 | |
| 1657 | class Win32Semaphore : public Semaphore { |
| 1658 | public: |
| 1659 | explicit Win32Semaphore(int count) { |
| 1660 | sem = ::CreateSemaphoreA(NULL, count, 0x7fffffff, NULL); |
| 1661 | } |
| 1662 | |
| 1663 | ~Win32Semaphore() { |
| 1664 | CloseHandle(sem); |
| 1665 | } |
| 1666 | |
| 1667 | void Wait() { |
| 1668 | WaitForSingleObject(sem, INFINITE); |
| 1669 | } |
| 1670 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1671 | bool Wait(int timeout) { |
| 1672 | // Timeout in Windows API is in milliseconds. |
| 1673 | DWORD millis_timeout = timeout / 1000; |
| 1674 | return WaitForSingleObject(sem, millis_timeout) != WAIT_TIMEOUT; |
| 1675 | } |
| 1676 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1677 | void Signal() { |
| 1678 | LONG dummy; |
| 1679 | ReleaseSemaphore(sem, 1, &dummy); |
| 1680 | } |
| 1681 | |
| 1682 | private: |
| 1683 | HANDLE sem; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1684 | }; |
| 1685 | |
| 1686 | |
| 1687 | Semaphore* OS::CreateSemaphore(int count) { |
| 1688 | return new Win32Semaphore(count); |
| 1689 | } |
| 1690 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1691 | |
| 1692 | // ---------------------------------------------------------------------------- |
| 1693 | // Win32 socket support. |
| 1694 | // |
| 1695 | |
| 1696 | class Win32Socket : public Socket { |
| 1697 | public: |
| 1698 | explicit Win32Socket() { |
| 1699 | // Create the socket. |
| 1700 | socket_ = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 1701 | } |
| 1702 | explicit Win32Socket(SOCKET socket): socket_(socket) { } |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1703 | virtual ~Win32Socket() { Shutdown(); } |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1704 | |
| 1705 | // Server initialization. |
| 1706 | bool Bind(const int port); |
| 1707 | bool Listen(int backlog) const; |
| 1708 | Socket* Accept() const; |
| 1709 | |
| 1710 | // Client initialization. |
| 1711 | bool Connect(const char* host, const char* port); |
| 1712 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1713 | // Shutdown socket for both read and write. |
| 1714 | bool Shutdown(); |
| 1715 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1716 | // Data Transimission |
| 1717 | int Send(const char* data, int len) const; |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1718 | int Receive(char* data, int len) const; |
| 1719 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1720 | bool SetReuseAddress(bool reuse_address); |
| 1721 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1722 | bool IsValid() const { return socket_ != INVALID_SOCKET; } |
| 1723 | |
| 1724 | private: |
| 1725 | SOCKET socket_; |
| 1726 | }; |
| 1727 | |
| 1728 | |
| 1729 | bool Win32Socket::Bind(const int port) { |
| 1730 | if (!IsValid()) { |
| 1731 | return false; |
| 1732 | } |
| 1733 | |
| 1734 | sockaddr_in addr; |
| 1735 | memset(&addr, 0, sizeof(addr)); |
| 1736 | addr.sin_family = AF_INET; |
| 1737 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 1738 | addr.sin_port = htons(port); |
| 1739 | int status = bind(socket_, |
| 1740 | reinterpret_cast<struct sockaddr *>(&addr), |
| 1741 | sizeof(addr)); |
| 1742 | return status == 0; |
| 1743 | } |
| 1744 | |
| 1745 | |
| 1746 | bool Win32Socket::Listen(int backlog) const { |
| 1747 | if (!IsValid()) { |
| 1748 | return false; |
| 1749 | } |
| 1750 | |
| 1751 | int status = listen(socket_, backlog); |
| 1752 | return status == 0; |
| 1753 | } |
| 1754 | |
| 1755 | |
| 1756 | Socket* Win32Socket::Accept() const { |
| 1757 | if (!IsValid()) { |
| 1758 | return NULL; |
| 1759 | } |
| 1760 | |
| 1761 | SOCKET socket = accept(socket_, NULL, NULL); |
| 1762 | if (socket == INVALID_SOCKET) { |
| 1763 | return NULL; |
| 1764 | } else { |
| 1765 | return new Win32Socket(socket); |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | |
| 1770 | bool Win32Socket::Connect(const char* host, const char* port) { |
| 1771 | if (!IsValid()) { |
| 1772 | return false; |
| 1773 | } |
| 1774 | |
| 1775 | // Lookup host and port. |
| 1776 | struct addrinfo *result = NULL; |
| 1777 | struct addrinfo hints; |
| 1778 | memset(&hints, 0, sizeof(addrinfo)); |
| 1779 | hints.ai_family = AF_INET; |
| 1780 | hints.ai_socktype = SOCK_STREAM; |
| 1781 | hints.ai_protocol = IPPROTO_TCP; |
| 1782 | int status = getaddrinfo(host, port, &hints, &result); |
| 1783 | if (status != 0) { |
| 1784 | return false; |
| 1785 | } |
| 1786 | |
| 1787 | // Connect. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1788 | status = connect(socket_, |
| 1789 | result->ai_addr, |
| 1790 | static_cast<int>(result->ai_addrlen)); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1791 | freeaddrinfo(result); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1792 | return status == 0; |
| 1793 | } |
| 1794 | |
| 1795 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1796 | bool Win32Socket::Shutdown() { |
| 1797 | if (IsValid()) { |
| 1798 | // Shutdown socket for both read and write. |
| 1799 | int status = shutdown(socket_, SD_BOTH); |
| 1800 | closesocket(socket_); |
| 1801 | socket_ = INVALID_SOCKET; |
| 1802 | return status == SOCKET_ERROR; |
| 1803 | } |
| 1804 | return true; |
| 1805 | } |
| 1806 | |
| 1807 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1808 | int Win32Socket::Send(const char* data, int len) const { |
| 1809 | int status = send(socket_, data, len, 0); |
| 1810 | return status; |
| 1811 | } |
| 1812 | |
| 1813 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1814 | int Win32Socket::Receive(char* data, int len) const { |
| 1815 | int status = recv(socket_, data, len, 0); |
| 1816 | return status; |
| 1817 | } |
| 1818 | |
| 1819 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1820 | bool Win32Socket::SetReuseAddress(bool reuse_address) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1821 | BOOL on = reuse_address ? true : false; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 1822 | int status = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, |
| 1823 | reinterpret_cast<char*>(&on), sizeof(on)); |
| 1824 | return status == SOCKET_ERROR; |
| 1825 | } |
| 1826 | |
| 1827 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1828 | bool Socket::Setup() { |
| 1829 | // Initialize Winsock32 |
| 1830 | int err; |
| 1831 | WSADATA winsock_data; |
| 1832 | WORD version_requested = MAKEWORD(1, 0); |
| 1833 | err = WSAStartup(version_requested, &winsock_data); |
| 1834 | if (err != 0) { |
| 1835 | PrintF("Unable to initialize Winsock, err = %d\n", Socket::LastError()); |
| 1836 | } |
| 1837 | |
| 1838 | return err == 0; |
| 1839 | } |
| 1840 | |
| 1841 | |
| 1842 | int Socket::LastError() { |
| 1843 | return WSAGetLastError(); |
| 1844 | } |
| 1845 | |
| 1846 | |
| 1847 | uint16_t Socket::HToN(uint16_t value) { |
| 1848 | return htons(value); |
| 1849 | } |
| 1850 | |
| 1851 | |
| 1852 | uint16_t Socket::NToH(uint16_t value) { |
| 1853 | return ntohs(value); |
| 1854 | } |
| 1855 | |
| 1856 | |
| 1857 | uint32_t Socket::HToN(uint32_t value) { |
| 1858 | return htonl(value); |
| 1859 | } |
| 1860 | |
| 1861 | |
| 1862 | uint32_t Socket::NToH(uint32_t value) { |
| 1863 | return ntohl(value); |
| 1864 | } |
| 1865 | |
| 1866 | |
| 1867 | Socket* OS::CreateSocket() { |
| 1868 | return new Win32Socket(); |
| 1869 | } |
| 1870 | |
| 1871 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1872 | // ---------------------------------------------------------------------------- |
| 1873 | // Win32 profiler support. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1874 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1875 | class Sampler::PlatformData : public Malloced { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1876 | public: |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1877 | // Get a handle to the calling thread. This is the thread that we are |
| 1878 | // going to profile. We need to make a copy of the handle because we are |
| 1879 | // going to use it in the sampler thread. Using GetThreadHandle() will |
| 1880 | // not work in this case. We're using OpenThread because DuplicateHandle |
| 1881 | // for some reason doesn't work in Chrome's sandbox. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1882 | PlatformData() : profiled_thread_(OpenThread(THREAD_GET_CONTEXT | |
| 1883 | THREAD_SUSPEND_RESUME | |
| 1884 | THREAD_QUERY_INFORMATION, |
| 1885 | false, |
| 1886 | GetCurrentThreadId())) {} |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1887 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1888 | ~PlatformData() { |
| 1889 | if (profiled_thread_ != NULL) { |
| 1890 | CloseHandle(profiled_thread_); |
| 1891 | profiled_thread_ = NULL; |
| 1892 | } |
| 1893 | } |
| 1894 | |
| 1895 | HANDLE profiled_thread() { return profiled_thread_; } |
| 1896 | |
| 1897 | private: |
| 1898 | HANDLE profiled_thread_; |
| 1899 | }; |
| 1900 | |
| 1901 | |
| 1902 | class SamplerThread : public Thread { |
| 1903 | public: |
| 1904 | explicit SamplerThread(int interval) |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1905 | : Thread("SamplerThread"), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1906 | interval_(interval) {} |
| 1907 | |
| 1908 | static void AddActiveSampler(Sampler* sampler) { |
| 1909 | ScopedLock lock(mutex_); |
| 1910 | SamplerRegistry::AddActiveSampler(sampler); |
| 1911 | if (instance_ == NULL) { |
| 1912 | instance_ = new SamplerThread(sampler->interval()); |
| 1913 | instance_->Start(); |
| 1914 | } else { |
| 1915 | ASSERT(instance_->interval_ == sampler->interval()); |
| 1916 | } |
| 1917 | } |
| 1918 | |
| 1919 | static void RemoveActiveSampler(Sampler* sampler) { |
| 1920 | ScopedLock lock(mutex_); |
| 1921 | SamplerRegistry::RemoveActiveSampler(sampler); |
| 1922 | if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) { |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 1923 | RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1924 | delete instance_; |
| 1925 | instance_ = NULL; |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | // Implement Thread::Run(). |
| 1930 | virtual void Run() { |
| 1931 | SamplerRegistry::State state; |
| 1932 | while ((state = SamplerRegistry::GetState()) != |
| 1933 | SamplerRegistry::HAS_NO_SAMPLERS) { |
| 1934 | bool cpu_profiling_enabled = |
| 1935 | (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS); |
| 1936 | bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled(); |
| 1937 | // When CPU profiling is enabled both JavaScript and C++ code is |
| 1938 | // profiled. We must not suspend. |
| 1939 | if (!cpu_profiling_enabled) { |
| 1940 | if (rate_limiter_.SuspendIfNecessary()) continue; |
| 1941 | } |
| 1942 | if (cpu_profiling_enabled) { |
| 1943 | if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) { |
| 1944 | return; |
| 1945 | } |
| 1946 | } |
| 1947 | if (runtime_profiler_enabled) { |
| 1948 | if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) { |
| 1949 | return; |
| 1950 | } |
| 1951 | } |
| 1952 | OS::Sleep(interval_); |
| 1953 | } |
| 1954 | } |
| 1955 | |
| 1956 | static void DoCpuProfile(Sampler* sampler, void* raw_sampler_thread) { |
| 1957 | if (!sampler->isolate()->IsInitialized()) return; |
| 1958 | if (!sampler->IsProfiling()) return; |
| 1959 | SamplerThread* sampler_thread = |
| 1960 | reinterpret_cast<SamplerThread*>(raw_sampler_thread); |
| 1961 | sampler_thread->SampleContext(sampler); |
| 1962 | } |
| 1963 | |
| 1964 | static void DoRuntimeProfile(Sampler* sampler, void* ignored) { |
| 1965 | if (!sampler->isolate()->IsInitialized()) return; |
| 1966 | sampler->isolate()->runtime_profiler()->NotifyTick(); |
| 1967 | } |
| 1968 | |
| 1969 | void SampleContext(Sampler* sampler) { |
| 1970 | HANDLE profiled_thread = sampler->platform_data()->profiled_thread(); |
| 1971 | if (profiled_thread == NULL) return; |
| 1972 | |
| 1973 | // Context used for sampling the register state of the profiled thread. |
| 1974 | CONTEXT context; |
| 1975 | memset(&context, 0, sizeof(context)); |
| 1976 | |
| 1977 | TickSample sample_obj; |
| 1978 | TickSample* sample = CpuProfiler::TickSampleEvent(sampler->isolate()); |
| 1979 | if (sample == NULL) sample = &sample_obj; |
| 1980 | |
| 1981 | static const DWORD kSuspendFailed = static_cast<DWORD>(-1); |
| 1982 | if (SuspendThread(profiled_thread) == kSuspendFailed) return; |
| 1983 | sample->state = sampler->isolate()->current_vm_state(); |
| 1984 | |
| 1985 | context.ContextFlags = CONTEXT_FULL; |
| 1986 | if (GetThreadContext(profiled_thread, &context) != 0) { |
| 1987 | #if V8_HOST_ARCH_X64 |
| 1988 | sample->pc = reinterpret_cast<Address>(context.Rip); |
| 1989 | sample->sp = reinterpret_cast<Address>(context.Rsp); |
| 1990 | sample->fp = reinterpret_cast<Address>(context.Rbp); |
| 1991 | #else |
| 1992 | sample->pc = reinterpret_cast<Address>(context.Eip); |
| 1993 | sample->sp = reinterpret_cast<Address>(context.Esp); |
| 1994 | sample->fp = reinterpret_cast<Address>(context.Ebp); |
| 1995 | #endif |
| 1996 | sampler->SampleStack(sample); |
| 1997 | sampler->Tick(sample); |
| 1998 | } |
| 1999 | ResumeThread(profiled_thread); |
| 2000 | } |
| 2001 | |
| 2002 | const int interval_; |
| 2003 | RuntimeProfilerRateLimiter rate_limiter_; |
| 2004 | |
| 2005 | // Protects the process wide state below. |
| 2006 | static Mutex* mutex_; |
| 2007 | static SamplerThread* instance_; |
| 2008 | |
| 2009 | DISALLOW_COPY_AND_ASSIGN(SamplerThread); |
| 2010 | }; |
| 2011 | |
| 2012 | |
| 2013 | Mutex* SamplerThread::mutex_ = OS::CreateMutex(); |
| 2014 | SamplerThread* SamplerThread::instance_ = NULL; |
| 2015 | |
| 2016 | |
| 2017 | Sampler::Sampler(Isolate* isolate, int interval) |
| 2018 | : isolate_(isolate), |
| 2019 | interval_(interval), |
| 2020 | profiling_(false), |
| 2021 | active_(false), |
| 2022 | samples_taken_(0) { |
| 2023 | data_ = new PlatformData; |
| 2024 | } |
| 2025 | |
| 2026 | |
| 2027 | Sampler::~Sampler() { |
| 2028 | ASSERT(!IsActive()); |
| 2029 | delete data_; |
| 2030 | } |
| 2031 | |
| 2032 | |
| 2033 | void Sampler::Start() { |
| 2034 | ASSERT(!IsActive()); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2035 | SetActive(true); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2036 | SamplerThread::AddActiveSampler(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2037 | } |
| 2038 | |
| 2039 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2040 | void Sampler::Stop() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2041 | ASSERT(IsActive()); |
| 2042 | SamplerThread::RemoveActiveSampler(this); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2043 | SetActive(false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2044 | } |
| 2045 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2046 | |
| 2047 | } } // namespace v8::internal |