Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1 | //===-- FDInterposing.cpp ---------------------------------------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file helps with catching double close calls on unix integer file |
| 11 | // descriptors by interposing functions for all file descriptor create and |
| 12 | // close operations. A stack backtrace for every create and close function is |
| 13 | // maintained, and every create and close operation is logged. When a double |
| 14 | // file descriptor close is encountered, it will be logged. |
| 15 | // |
| 16 | // To enable the interposing in a darwin program, set the DYLD_INSERT_LIBRARIES |
| 17 | // environment variable as follows: |
| 18 | // For sh: |
| 19 | // DYLD_INSERT_LIBRARIES=/path/to/FDInterposing.dylib /path/to/executable |
| 20 | // For tcsh: |
| 21 | // (setenv DYLD_INSERT_LIBRARIES=/path/to/FDInterposing.dylib ; /path/to/executable) |
| 22 | // |
| 23 | // Other environment variables that can alter the default actions of this |
| 24 | // interposing shared library include: |
| 25 | // |
| 26 | // "FileDescriptorStackLoggingNoCompact" |
| 27 | // |
| 28 | // With this environment variable set, all file descriptor create and |
| 29 | // delete operations will be permanantly maintained in the event map. |
| 30 | // The default action is to compact the create/delete events by removing |
| 31 | // any previous file descriptor create events that are matched with a |
| 32 | // corresponding file descriptor delete event when the next valid file |
| 33 | // descriptor create event is detected. |
| 34 | // |
| 35 | // "FileDescriptorMinimalLogging" |
| 36 | // |
| 37 | // By default every file descriptor create and delete operation is logged |
| 38 | // (to STDOUT by default, see the "FileDescriptorLogFile"). This can be |
| 39 | // suppressed to only show errors and warnings by setting this environment |
| 40 | // variable (the value in not important). |
| 41 | // |
| 42 | // "FileDescriptorLogFile=<path>" |
| 43 | // |
| 44 | // By default logging goes to STDOUT_FILENO, but this can be changed by |
| 45 | // setting FileDescriptorLogFile. The value is a path to a file that |
| 46 | // will be opened and used for logging. |
| 47 | //===----------------------------------------------------------------------===// |
| 48 | |
| 49 | #include <assert.h> |
| 50 | #include <dirent.h> |
| 51 | #include <errno.h> |
| 52 | #include <fcntl.h> |
| 53 | #include <execinfo.h> |
| 54 | #include <libgen.h> |
| 55 | #include <mach-o/dyld.h> |
| 56 | #include <mach-o/dyld-interposing.h> |
| 57 | #include <stdlib.h> |
| 58 | #include <stdio.h> |
| 59 | #include <string.h> |
| 60 | #include <sys/event.h> |
| 61 | #include <sys/mman.h> |
| 62 | #include <sys/socket.h> |
| 63 | #include <sys/types.h> |
| 64 | #include <sys/time.h> |
Benjamin Kramer | 1844426 | 2012-02-21 19:02:29 +0000 | [diff] [blame] | 65 | #include <tr1/memory> // for std::tr1::shared_ptr |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 66 | #include <unistd.h> |
| 67 | #include <string> |
| 68 | #include <vector> |
| 69 | #include <map> |
| 70 | |
| 71 | //---------------------------------------------------------------------- |
| 72 | /// @def DISALLOW_COPY_AND_ASSIGN(TypeName) |
| 73 | /// Macro definition for easily disallowing copy constructor and |
| 74 | /// assignment operators in C++ classes. |
| 75 | //---------------------------------------------------------------------- |
| 76 | #define DISALLOW_COPY_AND_ASSIGN(TypeName) \ |
| 77 | TypeName(const TypeName&); \ |
| 78 | const TypeName& operator=(const TypeName&) |
| 79 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 80 | extern "C" { |
| 81 | int accept$NOCANCEL (int, struct sockaddr * __restrict, socklen_t * __restrict); |
| 82 | int close$NOCANCEL(int); |
| 83 | int open$NOCANCEL(const char *, int, ...); |
| 84 | int __open_extended(const char *, int, uid_t, gid_t, int, struct kauth_filesec *); |
| 85 | } |
| 86 | |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 87 | namespace fd_interposing { |
| 88 | |
| 89 | //---------------------------------------------------------------------- |
| 90 | // String class so we can get formatted strings without having to worry |
| 91 | // about the memory storage since it will allocate the memory it needs. |
| 92 | //---------------------------------------------------------------------- |
| 93 | class String |
| 94 | { |
| 95 | public: |
| 96 | String () : |
| 97 | m_str (NULL) |
| 98 | {} |
| 99 | |
| 100 | String (const char *format, ...) : |
| 101 | m_str (NULL) |
| 102 | { |
| 103 | va_list args; |
| 104 | va_start (args, format); |
| 105 | vprintf (format, args); |
| 106 | va_end (args); |
| 107 | } |
| 108 | |
| 109 | ~String() |
| 110 | { |
| 111 | reset(); |
| 112 | } |
| 113 | |
| 114 | void |
| 115 | reset (char *s = NULL) |
| 116 | { |
| 117 | if (m_str) |
| 118 | ::free (m_str); |
| 119 | m_str = s; |
| 120 | } |
| 121 | |
| 122 | const char * |
| 123 | c_str () const |
| 124 | { |
| 125 | return m_str; |
| 126 | } |
| 127 | |
| 128 | void |
| 129 | printf (const char *format, ...) |
| 130 | { |
| 131 | va_list args; |
| 132 | va_start (args, format); |
| 133 | vprintf (format, args); |
| 134 | va_end (args); |
| 135 | } |
| 136 | void |
| 137 | vprintf (const char *format, va_list args) |
| 138 | { |
| 139 | reset(); |
| 140 | ::vasprintf (&m_str, format, args); |
| 141 | } |
| 142 | |
| 143 | void |
| 144 | log (int log_fd) |
| 145 | { |
| 146 | if (m_str && log_fd >= 0) |
| 147 | { |
| 148 | const int len = strlen(m_str); |
| 149 | if (len > 0) |
| 150 | { |
| 151 | write (log_fd, m_str, len); |
| 152 | const char last_char = m_str[len-1]; |
| 153 | if (!(last_char == '\n' || last_char == '\r')) |
| 154 | write (log_fd, "\n", 1); |
| 155 | } |
| 156 | } |
| 157 | } |
| 158 | protected: |
| 159 | char *m_str; |
| 160 | |
| 161 | private: |
| 162 | DISALLOW_COPY_AND_ASSIGN (String); |
| 163 | }; |
| 164 | |
| 165 | //---------------------------------------------------------------------- |
| 166 | // Type definitions |
| 167 | //---------------------------------------------------------------------- |
| 168 | typedef std::vector<void *> Frames; |
| 169 | class FDEvent; |
| 170 | typedef std::vector<void *> Frames; |
Benjamin Kramer | 1844426 | 2012-02-21 19:02:29 +0000 | [diff] [blame] | 171 | typedef std::tr1::shared_ptr<FDEvent> FDEventSP; |
| 172 | typedef std::tr1::shared_ptr<String> StringSP; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 173 | |
| 174 | |
| 175 | //---------------------------------------------------------------------- |
| 176 | // FDEvent |
| 177 | // |
| 178 | // A class that describes a file desciptor event. |
| 179 | // |
| 180 | // File descriptor events fall into one of two categories: create events |
| 181 | // and delete events. |
| 182 | //---------------------------------------------------------------------- |
| 183 | class FDEvent |
| 184 | { |
| 185 | public: |
| 186 | FDEvent (int fd, int err, const StringSP &string_sp, bool is_create, const Frames& frames) : |
| 187 | m_string_sp (string_sp), |
| 188 | m_frames (frames.begin(), frames.end()), |
| 189 | m_fd (fd), |
| 190 | m_err (err), |
| 191 | m_is_create (is_create) |
| 192 | {} |
| 193 | |
| 194 | ~FDEvent () {} |
| 195 | |
| 196 | bool |
| 197 | IsCreateEvent() const |
| 198 | { |
| 199 | return m_is_create; |
| 200 | } |
| 201 | |
| 202 | bool |
| 203 | IsDeleteEvent() const |
| 204 | { |
| 205 | return !m_is_create; |
| 206 | } |
| 207 | |
| 208 | Frames & |
| 209 | GetFrames () |
| 210 | { |
| 211 | return m_frames; |
| 212 | } |
| 213 | |
| 214 | const Frames & |
| 215 | GetFrames () const |
| 216 | { |
| 217 | return m_frames; |
| 218 | } |
| 219 | |
| 220 | int |
| 221 | GetFD () const |
| 222 | { |
| 223 | return m_fd; |
| 224 | } |
| 225 | |
| 226 | int |
| 227 | GetError () const |
| 228 | { |
| 229 | return m_err; |
| 230 | } |
| 231 | |
| 232 | void |
| 233 | Dump (int log_fd) const; |
| 234 | |
| 235 | void |
| 236 | SetCreateEvent (FDEventSP &create_event_sp) |
| 237 | { |
| 238 | m_create_event_sp = create_event_sp; |
| 239 | } |
| 240 | |
| 241 | private: |
| 242 | // A shared pointer to a String that describes this event in |
| 243 | // detail (all args and return and error values) |
| 244 | StringSP m_string_sp; |
| 245 | // The frames for the stack backtrace for this event |
| 246 | Frames m_frames; |
| 247 | // If this is a file descriptor delete event, this might contain |
| 248 | // the correspoding file descriptor create event |
| 249 | FDEventSP m_create_event_sp; |
| 250 | // The file descriptor for this event |
| 251 | int m_fd; |
| 252 | // The error code (if any) for this event |
| 253 | int m_err; |
| 254 | // True if this event is a file descriptor create event, false |
| 255 | // if it is a file descriptor delete event |
| 256 | bool m_is_create; |
| 257 | }; |
| 258 | |
| 259 | //---------------------------------------------------------------------- |
| 260 | // Templatized class that will save errno only if the "value" it is |
| 261 | // constructed with is equal to INVALID. When the class goes out of |
| 262 | // scope, it will restore errno if it was saved. |
| 263 | //---------------------------------------------------------------------- |
| 264 | template <int INVALID> |
| 265 | class Errno |
| 266 | { |
| 267 | public: |
| 268 | // Save errno only if we are supposed to |
| 269 | Errno (int value) : |
| 270 | m_saved_errno ((value == INVALID) ? errno : 0), |
| 271 | m_restore (value == INVALID) |
| 272 | { |
| 273 | } |
| 274 | |
| 275 | // Restore errno only if we are supposed to |
| 276 | ~Errno() |
| 277 | { |
| 278 | if (m_restore) |
| 279 | errno = m_saved_errno; |
| 280 | } |
| 281 | |
| 282 | // Accessor for the saved value of errno |
| 283 | int |
| 284 | get_errno() const |
| 285 | { |
| 286 | return m_saved_errno; |
| 287 | } |
| 288 | |
| 289 | protected: |
| 290 | const int m_saved_errno; |
| 291 | const bool m_restore; |
| 292 | }; |
| 293 | |
| 294 | typedef Errno<-1> InvalidFDErrno; |
| 295 | typedef Errno<-1> NegativeErrorErrno; |
| 296 | typedef std::vector<FDEventSP> FDEventArray; |
| 297 | typedef std::map<int, FDEventArray> FDEventMap; |
| 298 | |
| 299 | //---------------------------------------------------------------------- |
| 300 | // Globals |
| 301 | //---------------------------------------------------------------------- |
| 302 | // Global event map that contains all file descriptor events. As file |
| 303 | // descriptor create and close events come in, they will get filled |
| 304 | // into this map (protected by g_mutex). When a file descriptor close |
| 305 | // event is detected, the open event will be removed and placed into |
| 306 | // the close event so if something tries to double close a file |
| 307 | // descriptor we can show the previous close event and the file |
| 308 | // desctiptor event that created it. When a new file descriptor create |
| 309 | // event comes in, we will remove the previous one for that file |
| 310 | // desctiptor unless the environment variable "FileDescriptorStackLoggingNoCompact" |
| 311 | // is set. The file desctiptor history can be accessed using the |
| 312 | // get_fd_history() function. |
| 313 | static FDEventMap g_fd_event_map; |
| 314 | // A mutex to protect access to our data structures in g_fd_event_map |
| 315 | // and also our logging messages |
| 316 | static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 317 | // Log all file descriptor create and close events by default. Only log |
| 318 | // warnings and erros if the "FileDescriptorMinimalLogging" environment |
| 319 | // variable is set. |
| 320 | static int g_log_all_calls = 1; |
| 321 | // We compact the file descriptor events by default. Set the environment |
| 322 | // varible "FileDescriptorStackLoggingNoCompact" to keep a full history. |
| 323 | static int g_compact = 1; |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 324 | // The current process ID |
| 325 | static int g_pid = -1; |
| 326 | static bool g_enabled = true; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 327 | //---------------------------------------------------------------------- |
| 328 | // Mutex class that will lock a mutex when it is constructed, and unlock |
| 329 | // it when is goes out of scope |
| 330 | //---------------------------------------------------------------------- |
| 331 | class Locker |
| 332 | { |
| 333 | public: |
| 334 | Locker (pthread_mutex_t *mutex_ptr) : |
| 335 | m_mutex_ptr(mutex_ptr) |
| 336 | { |
| 337 | ::pthread_mutex_lock (m_mutex_ptr); |
| 338 | } |
| 339 | |
| 340 | // This allows clients to test try and acquire the mutex... |
| 341 | Locker (pthread_mutex_t *mutex_ptr, bool &lock_acquired) : |
| 342 | m_mutex_ptr(NULL) |
| 343 | { |
| 344 | lock_acquired = ::pthread_mutex_trylock(mutex_ptr) == 0; |
| 345 | if (lock_acquired) |
| 346 | m_mutex_ptr = mutex_ptr; |
| 347 | } |
| 348 | |
| 349 | ~Locker () |
| 350 | { |
| 351 | if (m_mutex_ptr) |
| 352 | ::pthread_mutex_unlock (m_mutex_ptr); |
| 353 | } |
| 354 | protected: |
| 355 | pthread_mutex_t *m_mutex_ptr; |
| 356 | }; |
| 357 | |
| 358 | static void |
| 359 | log (const char *format, ...) __attribute__ ((format (printf, 1, 2))); |
| 360 | |
| 361 | static void |
| 362 | log (int log_fd, const FDEvent *event, const char *format, ...) __attribute__ ((format (printf, 3, 4))); |
| 363 | |
| 364 | static void |
| 365 | backtrace_log (const char *format, ...) __attribute__ ((format (printf, 1, 2))); |
| 366 | |
| 367 | static void |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 368 | backtrace_error (const char *format, ...) __attribute__ ((format (printf, 1, 2))); |
| 369 | |
| 370 | static void |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 371 | log_to_fd (int log_fd, const char *format, ...) __attribute__ ((format (printf, 2, 3))); |
| 372 | |
| 373 | static inline size_t |
| 374 | get_backtrace (Frames &frame_buffer, size_t frames_to_remove) |
| 375 | { |
| 376 | void *frames[2048]; |
| 377 | int count = ::backtrace (&frames[0], sizeof(frames)/sizeof(void*)); |
| 378 | if (count > frames_to_remove) |
| 379 | frame_buffer.assign (&frames[frames_to_remove], &frames[count]); |
| 380 | else |
| 381 | frame_buffer.assign (&frames[0], &frames[count]); |
| 382 | while (frame_buffer.back() < (void *)1024) |
| 383 | frame_buffer.pop_back(); |
| 384 | return frame_buffer.size(); |
| 385 | } |
| 386 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 387 | static int g_log_fd = STDOUT_FILENO; |
| 388 | static int g_initialized = 0; |
| 389 | |
| 390 | const char * |
| 391 | get_process_fullpath (bool force = false) |
| 392 | { |
| 393 | static char g_process_fullpath[PATH_MAX] = {0}; |
| 394 | if (force || g_process_fullpath[0] == '\0') |
| 395 | { |
| 396 | // If DST is NULL, then return the number of bytes needed. |
| 397 | uint32_t len = sizeof(g_process_fullpath); |
| 398 | if (_NSGetExecutablePath (g_process_fullpath, &len) != 0) |
| 399 | strncpy (g_process_fullpath, "<error>", sizeof(g_process_fullpath)); |
| 400 | } |
| 401 | return g_process_fullpath; |
| 402 | } |
| 403 | |
| 404 | // Returns the current process ID, or -1 if inserposing not enabled for |
| 405 | // this process |
| 406 | static int |
| 407 | get_interposed_pid() |
| 408 | { |
| 409 | if (!g_enabled) |
| 410 | return -1; |
| 411 | |
| 412 | const pid_t pid = getpid(); |
| 413 | if (g_pid != pid) |
| 414 | { |
| 415 | if (g_pid == -1) |
| 416 | { |
| 417 | g_pid = pid; |
| 418 | log ("Interposing file descriptor create and delete functions for %s (pid=%i)\n", get_process_fullpath (true), pid); |
| 419 | } |
| 420 | else |
| 421 | { |
| 422 | log ("pid=%i: disabling interposing file descriptor create and delete functions for child process %s (pid=%i)\n", g_pid, get_process_fullpath (true), pid); |
| 423 | g_enabled = false; |
| 424 | return -1; |
| 425 | } |
| 426 | // Log when our process changes |
| 427 | } |
| 428 | return g_pid; |
| 429 | } |
| 430 | |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 431 | static int |
| 432 | get_logging_fd () |
| 433 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 434 | if (!g_enabled) |
| 435 | return -1; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 436 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 437 | if (!g_initialized) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 438 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 439 | g_initialized = 1; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 440 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 441 | const pid_t pid = get_interposed_pid(); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 442 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 443 | if (g_enabled) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 444 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 445 | // Keep all stack info around for all fd create and delete calls. |
| 446 | // Otherwise we will remove the fd create call when a corresponding |
| 447 | // fd delete call is received |
| 448 | if (getenv("FileDescriptorStackLoggingNoCompact")) |
| 449 | g_compact = 0; |
| 450 | |
| 451 | if (getenv("FileDescriptorMinimalLogging")) |
| 452 | g_log_all_calls = 0; |
| 453 | |
| 454 | const char *log_path = getenv ("FileDescriptorLogFile"); |
| 455 | if (log_path) |
| 456 | g_log_fd = ::creat (log_path, 0660); |
| 457 | else |
| 458 | g_log_fd = STDOUT_FILENO; |
| 459 | |
| 460 | // Only let this interposing happen on the first time this matches |
| 461 | // and stop this from happening so any child processes don't also |
| 462 | // log their file descriptors |
| 463 | ::unsetenv ("DYLD_INSERT_LIBRARIES"); |
| 464 | } |
| 465 | else |
| 466 | { |
| 467 | log ("pid=%i: logging disabled\n", getpid()); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 468 | } |
| 469 | } |
| 470 | return g_log_fd; |
| 471 | } |
| 472 | |
| 473 | void |
| 474 | log_to_fd (int log_fd, const char *format, va_list args) |
| 475 | { |
| 476 | if (format && format[0] && log_fd >= 0) |
| 477 | { |
| 478 | char buffer[PATH_MAX]; |
| 479 | const int count = ::vsnprintf (buffer, sizeof(buffer), format, args); |
| 480 | if (count > 0) |
| 481 | write (log_fd, buffer, count); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | void |
| 486 | log_to_fd (int log_fd, const char *format, ...) |
| 487 | { |
| 488 | if (format && format[0]) |
| 489 | { |
| 490 | va_list args; |
| 491 | va_start (args, format); |
| 492 | log_to_fd (log_fd, format, args); |
| 493 | va_end (args); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | void |
| 498 | log (const char *format, va_list args) |
| 499 | { |
| 500 | log_to_fd (get_logging_fd (), format, args); |
| 501 | } |
| 502 | |
| 503 | void |
| 504 | log (const char *format, ...) |
| 505 | { |
| 506 | if (format && format[0]) |
| 507 | { |
| 508 | va_list args; |
| 509 | va_start (args, format); |
| 510 | log (format, args); |
| 511 | va_end (args); |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | void |
| 516 | log (int log_fd, const FDEvent *event, const char *format, ...) |
| 517 | { |
| 518 | if (format && format[0]) |
| 519 | { |
| 520 | va_list args; |
| 521 | va_start (args, format); |
| 522 | log_to_fd (log_fd, format, args); |
| 523 | va_end (args); |
| 524 | } |
| 525 | if (event) |
| 526 | event->Dump(log_fd); |
| 527 | } |
| 528 | |
| 529 | void |
| 530 | FDEvent::Dump (int log_fd) const |
| 531 | { |
| 532 | if (log_fd >= 0) |
| 533 | { |
| 534 | log_to_fd (log_fd, "%s\n", m_string_sp->c_str()); |
| 535 | if (!m_frames.empty()) |
| 536 | ::backtrace_symbols_fd (m_frames.data(), m_frames.size(), log_fd); |
| 537 | |
| 538 | if (m_create_event_sp) |
| 539 | { |
| 540 | log_to_fd (log_fd, "\nfd=%i was created with this event:\n", m_fd); |
| 541 | m_create_event_sp->Dump (log_fd); |
| 542 | log_to_fd (log_fd, "\n"); |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | |
| 548 | void |
| 549 | backtrace_log (const char *format, ...) |
| 550 | { |
| 551 | const int log_fd = get_logging_fd (); |
| 552 | if (log_fd >= 0) |
| 553 | { |
| 554 | if (format && format[0]) |
| 555 | { |
| 556 | va_list args; |
| 557 | va_start (args, format); |
| 558 | log (format, args); |
| 559 | va_end (args); |
| 560 | } |
| 561 | |
| 562 | Frames frames; |
Greg Clayton | 06a3058 | 2012-01-14 18:18:31 +0000 | [diff] [blame] | 563 | if (get_backtrace(frames, 2)) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 564 | ::backtrace_symbols_fd (frames.data(), frames.size(), log_fd); |
| 565 | } |
| 566 | |
| 567 | } |
| 568 | |
| 569 | void |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 570 | backtrace_error (const char *format, ...) |
| 571 | { |
| 572 | const int pid = get_interposed_pid(); |
| 573 | if (pid >= 0) |
| 574 | { |
| 575 | const int log_fd = get_logging_fd (); |
| 576 | if (log_fd >= 0) |
| 577 | { |
| 578 | log ("\nerror: %s (pid=%i): ", get_process_fullpath (), pid); |
| 579 | |
| 580 | if (format && format[0]) |
| 581 | { |
| 582 | va_list args; |
| 583 | va_start (args, format); |
| 584 | log (format, args); |
| 585 | va_end (args); |
| 586 | } |
| 587 | |
| 588 | Frames frames; |
| 589 | if (get_backtrace(frames, 2)) |
| 590 | ::backtrace_symbols_fd (frames.data(), frames.size(), log_fd); |
| 591 | } |
| 592 | } |
| 593 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 594 | |
| 595 | void |
| 596 | save_backtrace (int fd, int err, const StringSP &string_sp, bool is_create) |
| 597 | { |
| 598 | Frames frames; |
| 599 | get_backtrace(frames, 2); |
| 600 | |
| 601 | FDEventSP fd_event_sp (new FDEvent (fd, err, string_sp, is_create, frames)); |
| 602 | |
| 603 | FDEventMap::iterator pos = g_fd_event_map.find (fd); |
| 604 | |
| 605 | if (pos != g_fd_event_map.end()) |
| 606 | { |
| 607 | // We have history for this fd... |
| 608 | |
| 609 | FDEventArray &event_array = g_fd_event_map[fd]; |
| 610 | if (fd_event_sp->IsCreateEvent()) |
| 611 | { |
| 612 | // The current fd event is a function that creates |
| 613 | // a descriptor, check in case last event was |
| 614 | // a create event. |
| 615 | if (event_array.back()->IsCreateEvent()) |
| 616 | { |
| 617 | const int log_fd = get_logging_fd(); |
| 618 | // Two fd create functions in a row, we missed |
| 619 | // a function that closes a fd... |
| 620 | log (log_fd, fd_event_sp.get(), "\nwarning: unmatched file descriptor create event fd=%i (we missed a file descriptor close event):\n", fd); |
| 621 | } |
| 622 | else if (g_compact) |
| 623 | { |
| 624 | // We are compacting so we remove previous create event |
| 625 | // when we get the correspinding delete event |
| 626 | event_array.pop_back(); |
| 627 | } |
| 628 | } |
| 629 | else |
| 630 | { |
| 631 | // The current fd event is a function that deletes |
| 632 | // a descriptor, check in case last event for this |
| 633 | // fd was a delete event (double close!) |
| 634 | if (event_array.back()->IsDeleteEvent()) |
| 635 | { |
| 636 | const int log_fd = get_logging_fd(); |
| 637 | // Two fd delete functions in a row, we must |
| 638 | // have missed some function that opened a descriptor |
| 639 | log (log_fd, fd_event_sp.get(), "\nwarning: unmatched file descriptor close event for fd=%d (we missed the file descriptor create event):\n", fd); |
| 640 | } |
| 641 | else if (g_compact) |
| 642 | { |
| 643 | // Since this is a close event, we want to remember the open event |
| 644 | // that this close if for... |
| 645 | fd_event_sp->SetCreateEvent(event_array.back()); |
| 646 | // We are compacting so we remove previous create event |
| 647 | // when we get the correspinding delete event |
| 648 | event_array.pop_back(); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | event_array.push_back(fd_event_sp); |
| 653 | } |
| 654 | else |
| 655 | { |
| 656 | g_fd_event_map[fd].push_back(fd_event_sp); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | //---------------------------------------------------------------------- |
| 661 | // socket() interpose function |
| 662 | //---------------------------------------------------------------------- |
| 663 | extern "C" int |
| 664 | socket$__interposed__ (int domain, int type, int protocol) |
| 665 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 666 | const int pid = get_interposed_pid(); |
| 667 | if (pid >= 0) |
| 668 | { |
| 669 | Locker locker (&g_mutex); |
| 670 | const int fd = ::socket (domain, type, protocol); |
| 671 | InvalidFDErrno fd_errno(fd); |
| 672 | StringSP description_sp(new String); |
| 673 | if (fd == -1) |
| 674 | description_sp->printf("pid=%i: socket (domain = %i, type = %i, protocol = %i) => fd=%i errno = %i", pid, domain, type, protocol, fd, fd_errno.get_errno()); |
| 675 | else |
| 676 | description_sp->printf("pid=%i: socket (domain = %i, type = %i, protocol = %i) => fd=%i", pid, domain, type, protocol, fd); |
| 677 | if (g_log_all_calls) |
| 678 | description_sp->log (get_logging_fd()); |
| 679 | if (fd >= 0) |
| 680 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 681 | return fd; |
| 682 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 683 | else |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 684 | { |
| 685 | return ::socket (domain, type, protocol); |
| 686 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 687 | } |
| 688 | |
| 689 | //---------------------------------------------------------------------- |
| 690 | // socketpair() interpose function |
| 691 | //---------------------------------------------------------------------- |
| 692 | extern "C" int |
| 693 | socketpair$__interposed__ (int domain, int type, int protocol, int fds[2]) |
| 694 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 695 | const int pid = get_interposed_pid(); |
| 696 | if (pid >= 0) |
| 697 | { |
| 698 | Locker locker (&g_mutex); |
| 699 | fds[0] = -1; |
| 700 | fds[1] = -1; |
| 701 | const int err = socketpair (domain, type, protocol, fds); |
| 702 | NegativeErrorErrno err_errno(err); |
| 703 | StringSP description_sp(new String ("pid=%i: socketpair (domain=%i, type=%i, protocol=%i, {fd=%i, fd=%i}) -> err=%i", pid, domain, type, protocol, fds[0], fds[1], err)); |
| 704 | if (g_log_all_calls) |
| 705 | description_sp->log (get_logging_fd()); |
| 706 | if (fds[0] >= 0) |
| 707 | save_backtrace (fds[0], err_errno.get_errno(), description_sp, true); |
| 708 | if (fds[1] >= 0) |
| 709 | save_backtrace (fds[1], err_errno.get_errno(), description_sp, true); |
| 710 | return err; |
| 711 | } |
| 712 | else |
| 713 | { |
| 714 | return socketpair (domain, type, protocol, fds); |
| 715 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | //---------------------------------------------------------------------- |
| 719 | // open() interpose function |
| 720 | //---------------------------------------------------------------------- |
| 721 | extern "C" int |
| 722 | open$__interposed__ (const char *path, int oflag, int mode) |
| 723 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 724 | const int pid = get_interposed_pid(); |
| 725 | if (pid >= 0) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 726 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 727 | Locker locker (&g_mutex); |
| 728 | int fd = -2; |
| 729 | StringSP description_sp(new String); |
| 730 | if (oflag & O_CREAT) |
| 731 | { |
| 732 | fd = ::open (path, oflag, mode); |
| 733 | description_sp->printf("pid=%i: open (path = '%s', oflag = %i, mode = %i) -> fd=%i", pid, path, oflag, mode, fd); |
| 734 | } |
| 735 | else |
| 736 | { |
| 737 | fd = ::open (path, oflag); |
| 738 | description_sp->printf("pid=%i: open (path = '%s', oflag = %i) -> fd=%i", pid, path, oflag, fd); |
| 739 | } |
| 740 | |
| 741 | InvalidFDErrno fd_errno(fd); |
| 742 | if (g_log_all_calls) |
| 743 | description_sp->log (get_logging_fd()); |
| 744 | if (fd >= 0) |
| 745 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 746 | return fd; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 747 | } |
| 748 | else |
| 749 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 750 | return ::open (path, oflag, mode); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 751 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | //---------------------------------------------------------------------- |
| 755 | // open$NOCANCEL() interpose function |
| 756 | //---------------------------------------------------------------------- |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 757 | extern "C" int |
| 758 | open$NOCANCEL$__interposed__ (const char *path, int oflag, int mode) |
| 759 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 760 | const int pid = get_interposed_pid(); |
| 761 | if (pid >= 0) |
| 762 | { |
| 763 | Locker locker (&g_mutex); |
| 764 | const int fd = ::open$NOCANCEL (path, oflag, mode); |
| 765 | InvalidFDErrno fd_errno(fd); |
| 766 | StringSP description_sp(new String ("pid=%i: open$NOCANCEL (path = '%s', oflag = %i, mode = %i) -> fd=%i", pid, path, oflag, mode, fd)); |
| 767 | if (g_log_all_calls) |
| 768 | description_sp->log (get_logging_fd()); |
| 769 | if (fd >= 0) |
| 770 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 771 | return fd; |
| 772 | } |
| 773 | else |
| 774 | { |
| 775 | return ::open$NOCANCEL (path, oflag, mode); |
| 776 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 777 | } |
| 778 | |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 779 | |
| 780 | //---------------------------------------------------------------------- |
| 781 | // __open_extended() interpose function |
| 782 | //---------------------------------------------------------------------- |
| 783 | extern "C" int |
| 784 | __open_extended$__interposed__ (const char *path, int oflag, uid_t uid, gid_t gid, int mode, struct kauth_filesec *fsacl) |
| 785 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 786 | const int pid = get_interposed_pid(); |
| 787 | if (pid >= 0) |
| 788 | { |
| 789 | Locker locker (&g_mutex); |
| 790 | const int fd = ::__open_extended (path, oflag, uid, gid, mode, fsacl); |
| 791 | InvalidFDErrno fd_errno(fd); |
| 792 | StringSP description_sp(new String ("pid=%i: __open_extended (path='%s', oflag=%i, uid=%i, gid=%i, mode=%i, fsacl=%p) -> fd=%i", pid, path, oflag, uid, gid, mode, fsacl, fd)); |
| 793 | if (g_log_all_calls) |
| 794 | description_sp->log (get_logging_fd()); |
| 795 | if (fd >= 0) |
| 796 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 797 | return fd; |
| 798 | } |
| 799 | else |
| 800 | { |
| 801 | return ::__open_extended (path, oflag, uid, gid, mode, fsacl); |
| 802 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 803 | } |
| 804 | |
| 805 | //---------------------------------------------------------------------- |
| 806 | // kqueue() interpose function |
| 807 | //---------------------------------------------------------------------- |
| 808 | extern "C" int |
| 809 | kqueue$__interposed__ (void) |
| 810 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 811 | const int pid = get_interposed_pid(); |
| 812 | if (pid >= 0) |
| 813 | { |
| 814 | Locker locker (&g_mutex); |
| 815 | const int fd = ::kqueue (); |
| 816 | InvalidFDErrno fd_errno(fd); |
| 817 | StringSP description_sp(new String ("pid=%i: kqueue () -> fd=%i", pid, fd)); |
| 818 | if (g_log_all_calls) |
| 819 | description_sp->log (get_logging_fd()); |
| 820 | if (fd >= 0) |
| 821 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 822 | return fd; |
| 823 | } |
| 824 | else |
| 825 | { |
| 826 | return ::kqueue (); |
| 827 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | //---------------------------------------------------------------------- |
| 831 | // shm_open() interpose function |
| 832 | //---------------------------------------------------------------------- |
| 833 | extern "C" int |
| 834 | shm_open$__interposed__ (const char *path, int oflag, int mode) |
| 835 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 836 | const int pid = get_interposed_pid(); |
| 837 | if (pid >= 0) |
| 838 | { |
| 839 | Locker locker (&g_mutex); |
| 840 | const int fd = ::shm_open (path, oflag, mode); |
| 841 | InvalidFDErrno fd_errno(fd); |
| 842 | StringSP description_sp(new String ("pid=%i: shm_open (path = '%s', oflag = %i, mode = %i) -> fd=%i", pid, path, oflag, mode, fd)); |
| 843 | if (g_log_all_calls) |
| 844 | description_sp->log (get_logging_fd()); |
| 845 | if (fd >= 0) |
| 846 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 847 | return fd; |
| 848 | } |
| 849 | else |
| 850 | { |
| 851 | return ::shm_open (path, oflag, mode); |
| 852 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | //---------------------------------------------------------------------- |
| 856 | // accept() interpose function |
| 857 | //---------------------------------------------------------------------- |
| 858 | extern "C" int |
| 859 | accept$__interposed__ (int socket, struct sockaddr *address, socklen_t *address_len) |
| 860 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 861 | const int pid = get_interposed_pid(); |
| 862 | if (pid >= 0) |
| 863 | { |
| 864 | Locker locker (&g_mutex); |
| 865 | const int fd = ::accept (socket, address, address_len); |
| 866 | InvalidFDErrno fd_errno(fd); |
| 867 | StringSP description_sp(new String ("pid=%i: accept (socket=%i, ...) -> fd=%i", pid, socket, fd)); |
| 868 | if (g_log_all_calls) |
| 869 | description_sp->log (get_logging_fd()); |
| 870 | if (fd >= 0) |
| 871 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 872 | return fd; |
| 873 | } |
| 874 | else |
| 875 | { |
| 876 | return ::accept (socket, address, address_len); |
| 877 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | |
| 881 | //---------------------------------------------------------------------- |
| 882 | // accept$NOCANCEL() interpose function |
| 883 | //---------------------------------------------------------------------- |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 884 | extern "C" int |
| 885 | accept$NOCANCEL$__interposed__ (int socket, struct sockaddr *address, socklen_t *address_len) |
| 886 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 887 | const int pid = get_interposed_pid(); |
| 888 | if (pid >= 0) |
| 889 | { |
| 890 | Locker locker (&g_mutex); |
| 891 | const int fd = ::accept$NOCANCEL (socket, address, address_len); |
| 892 | InvalidFDErrno fd_errno(fd); |
| 893 | StringSP description_sp(new String ("pid=%i: accept$NOCANCEL (socket=%i, ...) -> fd=%i", pid, socket, fd)); |
| 894 | if (g_log_all_calls) |
| 895 | description_sp->log (get_logging_fd()); |
| 896 | if (fd >= 0) |
| 897 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 898 | return fd; |
| 899 | } |
| 900 | else |
| 901 | { |
| 902 | return ::accept$NOCANCEL (socket, address, address_len); |
| 903 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | //---------------------------------------------------------------------- |
| 907 | // dup() interpose function |
| 908 | //---------------------------------------------------------------------- |
| 909 | extern "C" int |
| 910 | dup$__interposed__ (int fd2) |
| 911 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 912 | const int pid = get_interposed_pid(); |
| 913 | if (pid >= 0) |
| 914 | { |
| 915 | Locker locker (&g_mutex); |
| 916 | const int fd = ::dup (fd2); |
| 917 | InvalidFDErrno fd_errno(fd); |
| 918 | StringSP description_sp(new String ("pid=%i: dup (fd2=%i) -> fd=%i", pid, fd2, fd)); |
| 919 | if (g_log_all_calls) |
| 920 | description_sp->log (get_logging_fd()); |
| 921 | if (fd >= 0) |
| 922 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 923 | return fd; |
| 924 | } |
| 925 | else |
| 926 | { |
| 927 | return ::dup (fd2); |
| 928 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | //---------------------------------------------------------------------- |
| 932 | // dup2() interpose function |
| 933 | //---------------------------------------------------------------------- |
| 934 | extern "C" int |
| 935 | dup2$__interposed__ (int fd1, int fd2) |
| 936 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 937 | const int pid = get_interposed_pid(); |
| 938 | if (pid >= 0) |
| 939 | { |
| 940 | Locker locker (&g_mutex); |
| 941 | // If "fd2" is already opened, it will be closed during the |
| 942 | // dup2 call below, so we need to see if we have fd2 in our |
| 943 | // open map and treat it as a close(fd2) |
| 944 | FDEventMap::iterator pos = g_fd_event_map.find (fd2); |
| 945 | StringSP dup2_close_description_sp(new String ("pid=%i: dup2 (fd1=%i, fd2=%i) -> will close (fd=%i)", pid, fd1, fd2, fd2)); |
| 946 | if (pos != g_fd_event_map.end() && pos->second.back()->IsCreateEvent()) |
| 947 | save_backtrace (fd2, 0, dup2_close_description_sp, false); |
Greg Clayton | 06a3058 | 2012-01-14 18:18:31 +0000 | [diff] [blame] | 948 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 949 | const int fd = ::dup2(fd1, fd2); |
| 950 | InvalidFDErrno fd_errno(fd); |
| 951 | StringSP description_sp(new String ("pid=%i: dup2 (fd1=%i, fd2=%i) -> fd=%i", pid, fd1, fd2, fd)); |
| 952 | if (g_log_all_calls) |
| 953 | description_sp->log (get_logging_fd()); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 954 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 955 | if (fd >= 0) |
| 956 | save_backtrace (fd, fd_errno.get_errno(), description_sp, true); |
| 957 | return fd; |
| 958 | } |
| 959 | else |
| 960 | { |
| 961 | return ::dup2(fd1, fd2); |
| 962 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | //---------------------------------------------------------------------- |
| 966 | // close() interpose function |
| 967 | //---------------------------------------------------------------------- |
| 968 | extern "C" int |
| 969 | close$__interposed__ (int fd) |
| 970 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 971 | const int pid = get_interposed_pid(); |
| 972 | if (pid >= 0) |
| 973 | { |
| 974 | Locker locker (&g_mutex); |
| 975 | const int err = close(fd); |
| 976 | NegativeErrorErrno err_errno(err); |
| 977 | StringSP description_sp (new String); |
| 978 | if (err == -1) |
| 979 | description_sp->printf("pid=%i: close (fd=%i) => %i errno = %i (%s))", pid, fd, err, err_errno.get_errno(), strerror(err_errno.get_errno())); |
| 980 | else |
| 981 | description_sp->printf("pid=%i: close (fd=%i) => %i", pid, fd, err); |
| 982 | if (g_log_all_calls) |
| 983 | description_sp->log (get_logging_fd()); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 984 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 985 | if (err == 0) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 986 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 987 | if (fd >= 0) |
| 988 | save_backtrace (fd, err, description_sp, false); |
| 989 | } |
| 990 | else if (err == -1) |
| 991 | { |
| 992 | if (err_errno.get_errno() == EBADF && fd != -1) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 993 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 994 | backtrace_error ("close (fd=%d) resulted in EBADF:\n", fd); |
| 995 | |
| 996 | FDEventMap::iterator pos = g_fd_event_map.find (fd); |
| 997 | if (pos != g_fd_event_map.end()) |
| 998 | { |
| 999 | log (get_logging_fd(), pos->second.back().get(), "\nfd=%d was previously %s with this event:\n", fd, pos->second.back()->IsCreateEvent() ? "opened" : "closed"); |
| 1000 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1001 | } |
| 1002 | } |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1003 | return err; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1004 | } |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1005 | else |
| 1006 | { |
| 1007 | return close (fd); |
| 1008 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1009 | } |
| 1010 | |
| 1011 | //---------------------------------------------------------------------- |
| 1012 | // close$NOCANCEL() interpose function |
| 1013 | //---------------------------------------------------------------------- |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1014 | extern "C" int |
| 1015 | close$NOCANCEL$__interposed__ (int fd) |
| 1016 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1017 | const int pid = get_interposed_pid(); |
| 1018 | if (pid >= 0) |
| 1019 | { |
| 1020 | Locker locker (&g_mutex); |
| 1021 | const int err = close$NOCANCEL(fd); |
| 1022 | NegativeErrorErrno err_errno(err); |
| 1023 | StringSP description_sp (new String); |
| 1024 | if (err == -1) |
| 1025 | description_sp->printf("pid=%i: close$NOCANCEL (fd=%i) => %i errno = %i (%s))", pid, fd, err, err_errno.get_errno(), strerror(err_errno.get_errno())); |
| 1026 | else |
| 1027 | description_sp->printf("pid=%i: close$NOCANCEL (fd=%i) => %i", pid, fd, err); |
| 1028 | if (g_log_all_calls) |
| 1029 | description_sp->log (get_logging_fd()); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1030 | |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1031 | if (err == 0) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1032 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1033 | if (fd >= 0) |
| 1034 | save_backtrace (fd, err, description_sp, false); |
| 1035 | } |
| 1036 | else if (err == -1) |
| 1037 | { |
| 1038 | if (err_errno.get_errno() == EBADF && fd != -1) |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1039 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1040 | backtrace_error ("close$NOCANCEL (fd=%d) resulted in EBADF\n:", fd); |
| 1041 | |
| 1042 | FDEventMap::iterator pos = g_fd_event_map.find (fd); |
| 1043 | if (pos != g_fd_event_map.end()) |
| 1044 | { |
| 1045 | log (get_logging_fd(), pos->second.back().get(), "\nfd=%d was previously %s with this event:\n", fd, pos->second.back()->IsCreateEvent() ? "opened" : "closed"); |
| 1046 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1047 | } |
| 1048 | } |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1049 | return err; |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1050 | } |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1051 | else |
| 1052 | { |
| 1053 | return close$NOCANCEL(fd); |
| 1054 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | //---------------------------------------------------------------------- |
| 1058 | // pipe() interpose function |
| 1059 | //---------------------------------------------------------------------- |
| 1060 | extern "C" int |
| 1061 | pipe$__interposed__ (int fds[2]) |
| 1062 | { |
Greg Clayton | ad639b6 | 2012-01-16 22:21:29 +0000 | [diff] [blame] | 1063 | const int pid = get_interposed_pid(); |
| 1064 | if (pid >= 0) |
| 1065 | { |
| 1066 | Locker locker (&g_mutex); |
| 1067 | fds[0] = -1; |
| 1068 | fds[1] = -1; |
| 1069 | const int err = pipe (fds); |
| 1070 | const int saved_errno = errno; |
| 1071 | StringSP description_sp(new String ("pid=%i: pipe ({fd=%i, fd=%i}) -> err=%i", pid, fds[0], fds[1], err)); |
| 1072 | if (g_log_all_calls) |
| 1073 | description_sp->log (get_logging_fd()); |
| 1074 | if (fds[0] >= 0) |
| 1075 | save_backtrace (fds[0], saved_errno, description_sp, true); |
| 1076 | if (fds[1] >= 0) |
| 1077 | save_backtrace (fds[1], saved_errno, description_sp, true); |
| 1078 | errno = saved_errno; |
| 1079 | return err; |
| 1080 | } |
| 1081 | else |
| 1082 | { |
| 1083 | return pipe (fds); |
| 1084 | } |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1085 | } |
| 1086 | |
| 1087 | //---------------------------------------------------------------------- |
| 1088 | // get_fd_history() |
| 1089 | // |
| 1090 | // This function allows runtime access to the file descriptor history. |
| 1091 | // |
| 1092 | // @param[in] log_fd |
| 1093 | // The file descriptor to log to |
| 1094 | // |
| 1095 | // @param[in] fd |
| 1096 | // The file descriptor whose history should be dumped |
| 1097 | //---------------------------------------------------------------------- |
| 1098 | extern "C" void |
| 1099 | get_fd_history (int log_fd, int fd) |
| 1100 | { |
| 1101 | // "create" below needs to be outside of the mutex locker scope |
| 1102 | if (log_fd >= 0) |
| 1103 | { |
| 1104 | bool got_lock = false; |
| 1105 | Locker locker (&g_mutex, got_lock); |
| 1106 | if (got_lock) |
| 1107 | { |
| 1108 | FDEventMap::iterator pos = g_fd_event_map.find (fd); |
| 1109 | log_to_fd (log_fd, "Dumping file descriptor history for fd=%i:\n", fd); |
| 1110 | if (pos != g_fd_event_map.end()) |
| 1111 | { |
| 1112 | FDEventArray &event_array = g_fd_event_map[fd]; |
| 1113 | const size_t num_events = event_array.size(); |
| 1114 | for (size_t i=0; i<num_events; ++i) |
| 1115 | event_array[i]->Dump (log_fd); |
| 1116 | } |
| 1117 | else |
| 1118 | { |
| 1119 | log_to_fd (log_fd, "error: no file descriptor events found for fd=%i\n", fd); |
| 1120 | } |
| 1121 | } |
| 1122 | else |
| 1123 | { |
| 1124 | log_to_fd (log_fd, "error: fd event mutex is locked...\n"); |
| 1125 | } |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | //---------------------------------------------------------------------- |
| 1130 | // Interposing |
| 1131 | //---------------------------------------------------------------------- |
| 1132 | // FD creation routines |
| 1133 | DYLD_INTERPOSE(accept$__interposed__, accept); |
| 1134 | DYLD_INTERPOSE(accept$NOCANCEL$__interposed__, accept$NOCANCEL); |
| 1135 | DYLD_INTERPOSE(dup$__interposed__, dup); |
| 1136 | DYLD_INTERPOSE(dup2$__interposed__, dup2); |
| 1137 | DYLD_INTERPOSE(kqueue$__interposed__, kqueue); |
| 1138 | DYLD_INTERPOSE(open$__interposed__, open); |
| 1139 | DYLD_INTERPOSE(open$NOCANCEL$__interposed__, open$NOCANCEL); |
Greg Clayton | cb5ad0b | 2012-01-10 00:29:36 +0000 | [diff] [blame] | 1140 | DYLD_INTERPOSE(__open_extended$__interposed__, __open_extended); |
| 1141 | DYLD_INTERPOSE(pipe$__interposed__, pipe); |
| 1142 | DYLD_INTERPOSE(shm_open$__interposed__, shm_open); |
| 1143 | DYLD_INTERPOSE(socket$__interposed__, socket); |
| 1144 | DYLD_INTERPOSE(socketpair$__interposed__, socketpair); |
| 1145 | |
| 1146 | // FD deleting routines |
| 1147 | DYLD_INTERPOSE(close$__interposed__, close); |
| 1148 | DYLD_INTERPOSE(close$NOCANCEL$__interposed__, close$NOCANCEL); |
| 1149 | |
| 1150 | } // namespace fd_interposing |
| 1151 | |
| 1152 | |