| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "../libnetdata.h" |
| 4 | |
| 5 | #ifdef NETDATA_TRACE_RWLOCKS |
| 6 | |
| 7 | #ifndef NETDATA_TRACE_RWLOCKS_WAIT_TIME_TO_IGNORE_USEC |
| 8 | #define NETDATA_TRACE_RWLOCKS_WAIT_TIME_TO_IGNORE_USEC 10 |
| 9 | #endif |
| 10 | |
| 11 | #ifndef NETDATA_TRACE_RWLOCKS_HOLD_TIME_TO_IGNORE_USEC |
| 12 | #define NETDATA_TRACE_RWLOCKS_HOLD_TIME_TO_IGNORE_USEC 10000 |
| 13 | #endif |
| 14 | |
| 15 | #ifndef NETDATA_THREAD_LOCKS_ARRAY_SIZE |
| 16 | #define NETDATA_THREAD_LOCKS_ARRAY_SIZE 10 |
| 17 | #endif |
| 18 | |
| 19 | #endif // NETDATA_TRACE_RWLOCKS |
| 20 | |
| 21 | // ---------------------------------------------------------------------------- |
| 22 | // mutex |
| 23 | |
| 24 | ALWAYS_INLINE int __netdata_cond_init(netdata_cond_t *cond) { |
| 25 | int ret = uv_cond_init(cond); |
| 26 | if(unlikely(ret != 0)) |
| 27 | netdata_log_error("COND: failed to initialize (code %d).", ret); |
| 28 | return ret; |
| 29 | } |
| 30 | |
| 31 | ALWAYS_INLINE void __netdata_cond_destroy(netdata_cond_t *cond) { |
| 32 | uv_cond_destroy(cond); |
| 33 | } |
| 34 | |
| 35 | ALWAYS_INLINE void __netdata_cond_signal(netdata_cond_t *cond) { |
| 36 | uv_cond_signal(cond); |
| 37 | } |
| 38 | |
| 39 | ALWAYS_INLINE void __netdata_cond_broadcast(netdata_cond_t *cond) { |
| 40 | uv_cond_broadcast(cond); |
| 41 | } |
| 42 | |
| 43 | ALWAYS_INLINE void __netdata_cond_wait(netdata_cond_t *cond, netdata_mutex_t *mutex) |
| 44 | { |
| 45 | uv_cond_wait(cond, mutex); |
| 46 | } |
| 47 | |
| 48 | ALWAYS_INLINE int __netdata_cond_timedwait(netdata_cond_t *cond, netdata_mutex_t *mutex, uint64_t timeout_ns) |
| 49 | { |
| 50 | int ret = uv_cond_timedwait(cond, mutex, timeout_ns); |
| 51 | return ret; |
| 52 | } |
| 53 | |
| 54 | ALWAYS_INLINE int __netdata_mutex_init(netdata_mutex_t *mutex) { |
| 55 | int ret = uv_mutex_init(mutex); |
| 56 | if(unlikely(ret != 0)) |
| 57 | netdata_log_error("MUTEX_LOCK: failed to initialize (code %d).", ret); |
| 58 | return ret; |
| 59 | } |
| 60 | |
| 61 | ALWAYS_INLINE void __netdata_mutex_destroy(netdata_mutex_t *mutex) { |
| 62 | uv_mutex_destroy(mutex); |
| 63 | } |
| 64 | |
| 65 | ALWAYS_INLINE void __netdata_mutex_lock(netdata_mutex_t *mutex) { |
| 66 | uv_mutex_lock(mutex); |
| 67 | nd_thread_mutex_locked(); |
| 68 | } |
| 69 | |
| 70 | ALWAYS_INLINE int __netdata_mutex_trylock(netdata_mutex_t *mutex) { |
| 71 | int ret = uv_mutex_trylock(mutex); |
| 72 | if(ret != 0) |
| 73 | ; |
| 74 | else |
| 75 | nd_thread_mutex_locked(); |
| 76 | |
| 77 | return ret; |
| 78 | } |
| 79 | |
| 80 | ALWAYS_INLINE void __netdata_mutex_unlock(netdata_mutex_t *mutex) { |
| 81 | uv_mutex_unlock(mutex); |
| 82 | nd_thread_mutex_unlocked(); |
| 83 | } |
| 84 | |
| 85 | #ifdef NETDATA_TRACE_RWLOCKS |
| 86 | |
| 87 | int netdata_mutex_init_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 88 | const unsigned long line __maybe_unused, netdata_mutex_t *mutex) { |
| 89 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_init(%p) from %lu@%s, %s()", mutex, line, file, function); |
| 90 | |
| 91 | int ret = __netdata_mutex_init(mutex); |
| 92 | |
| 93 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_init(%p) = %d, from %lu@%s, %s()", mutex, ret, line, file, function); |
| 94 | |
| 95 | return ret; |
| 96 | } |
| 97 | |
| 98 | int netdata_mutex_destroy_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 99 | const unsigned long line __maybe_unused, netdata_mutex_t *mutex) { |
| 100 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_destroy(%p) from %lu@%s, %s()", mutex, line, file, function); |
| 101 | |
| 102 | int ret = __netdata_mutex_destroy(mutex); |
| 103 | |
| 104 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_destroy(%p) = %d, from %lu@%s, %s()", mutex, ret, line, file, function); |
| 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | int netdata_mutex_lock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 110 | const unsigned long line __maybe_unused, netdata_mutex_t *mutex) { |
| 111 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_lock(%p) from %lu@%s, %s()", mutex, line, file, function); |
| 112 | |
| 113 | usec_t start_s = now_monotonic_high_precision_usec(); |
| 114 | int ret = __netdata_mutex_lock(mutex); |
| 115 | usec_t end_s = now_monotonic_high_precision_usec(); |
| 116 | |
| 117 | // remove compiler unused variables warning |
| 118 | (void)start_s; |
| 119 | (void)end_s; |
| 120 | |
| 121 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_lock(%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, end_s - start_s, line, file, function); |
| 122 | |
| 123 | return ret; |
| 124 | } |
| 125 | |
| 126 | int netdata_mutex_trylock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 127 | const unsigned long line __maybe_unused, netdata_mutex_t *mutex) { |
| 128 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_trylock(%p) from %lu@%s, %s()", mutex, line, file, function); |
| 129 | |
| 130 | usec_t start_s = now_monotonic_high_precision_usec(); |
| 131 | int ret = __netdata_mutex_trylock(mutex); |
| 132 | usec_t end_s = now_monotonic_high_precision_usec(); |
| 133 | |
| 134 | // remove compiler unused variables warning |
| 135 | (void)start_s; |
| 136 | (void)end_s; |
| 137 | |
| 138 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_trylock(%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, end_s - start_s, line, file, function); |
| 139 | |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | int netdata_mutex_unlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 144 | const unsigned long line __maybe_unused, netdata_mutex_t *mutex) { |
| 145 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_unlock(%p) from %lu@%s, %s()", mutex, line, file, function); |
| 146 | |
| 147 | usec_t start_s = now_monotonic_high_precision_usec(); |
| 148 | int ret = __netdata_mutex_unlock(mutex); |
| 149 | usec_t end_s = now_monotonic_high_precision_usec(); |
| 150 | |
| 151 | // remove compiler unused variables warning |
| 152 | (void)start_s; |
| 153 | (void)end_s; |
| 154 | |
| 155 | netdata_log_debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_unlock(%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, end_s - start_s, line, file, function); |
| 156 | |
| 157 | return ret; |
| 158 | } |
| 159 | |
| 160 | #endif // NETDATA_TRACE_RWLOCKS |
| 161 | |
| 162 | // ---------------------------------------------------------------------------- |
| 163 | // rwlock |
| 164 | |
| 165 | ALWAYS_INLINE void __netdata_rwlock_destroy(netdata_rwlock_t *rwlock) { |
| 166 | uv_rwlock_destroy(&rwlock->rwlock_t); |
| 167 | } |
| 168 | |
| 169 | ALWAYS_INLINE int __netdata_rwlock_init(netdata_rwlock_t *rwlock) { |
| 170 | int ret = uv_rwlock_init(&rwlock->rwlock_t); |
| 171 | if(unlikely(ret != 0)) |
| 172 | netdata_log_error("RW_LOCK: failed to initialize lock (code %d)", ret); |
| 173 | return ret; |
| 174 | } |
| 175 | |
| 176 | ALWAYS_INLINE void __netdata_rwlock_rdlock(netdata_rwlock_t *rwlock) { |
| 177 | uv_rwlock_rdlock(&rwlock->rwlock_t); |
| 178 | nd_thread_rwlock_read_locked(); |
| 179 | } |
| 180 | |
| 181 | ALWAYS_INLINE void __netdata_rwlock_wrlock(netdata_rwlock_t *rwlock) { |
| 182 | uv_rwlock_wrlock(&rwlock->rwlock_t); |
| 183 | nd_thread_rwlock_write_locked(); |
| 184 | } |
| 185 | |
| 186 | ALWAYS_INLINE void __netdata_rwlock_rdunlock(netdata_rwlock_t *rwlock) { |
| 187 | uv_rwlock_rdunlock(&rwlock->rwlock_t); |
| 188 | nd_thread_rwlock_read_unlocked(); |
| 189 | } |
| 190 | |
| 191 | ALWAYS_INLINE void __netdata_rwlock_wrunlock(netdata_rwlock_t *rwlock) { |
| 192 | uv_rwlock_wrunlock(&rwlock->rwlock_t); |
| 193 | nd_thread_rwlock_write_unlocked(); |
| 194 | } |
| 195 | |
| 196 | ALWAYS_INLINE int __netdata_rwlock_tryrdlock(netdata_rwlock_t *rwlock) { |
| 197 | int ret = uv_rwlock_tryrdlock(&rwlock->rwlock_t); |
| 198 | if(ret != 0) |
| 199 | ; |
| 200 | else |
| 201 | nd_thread_rwlock_read_locked(); |
| 202 | |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | ALWAYS_INLINE int __netdata_rwlock_trywrlock(netdata_rwlock_t *rwlock) { |
| 207 | int ret = uv_rwlock_trywrlock(&rwlock->rwlock_t); |
| 208 | if(ret != 0) |
| 209 | ; |
| 210 | else |
| 211 | nd_thread_rwlock_write_locked(); |
| 212 | |
| 213 | return ret; |
| 214 | } |
| 215 | |
| 216 | #ifdef NETDATA_TRACE_RWLOCKS |
| 217 | |
| 218 | // ---------------------------------------------------------------------------- |
| 219 | // lockers list |
| 220 | |
| 221 | static netdata_rwlock_locker *find_rwlock_locker(const char *file __maybe_unused, const char *function __maybe_unused, const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 222 | pid_t pid = gettid(); |
| 223 | netdata_rwlock_locker *locker = NULL; |
| 224 | |
| 225 | __netdata_mutex_lock(&rwlock->lockers_mutex); |
| 226 | Pvoid_t *PValue = JudyLGet(rwlock->lockers_pid_JudyL, pid, PJE0); |
| 227 | if(PValue && *PValue) |
| 228 | locker = *PValue; |
| 229 | __netdata_mutex_unlock(&rwlock->lockers_mutex); |
| 230 | |
| 231 | return locker; |
| 232 | } |
| 233 | |
| 234 | static netdata_rwlock_locker *add_rwlock_locker(const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock, LOCKER_REQUEST lock_type) { |
| 235 | netdata_rwlock_locker *locker; |
| 236 | |
| 237 | locker = find_rwlock_locker(file, function, line, rwlock); |
| 238 | if(locker) { |
| 239 | locker->lock |= lock_type; |
| 240 | locker->refcount++; |
| 241 | } |
| 242 | else { |
| 243 | locker = mallocz(sizeof(netdata_rwlock_locker)); |
| 244 | locker->pid = gettid(); |
| 245 | locker->tag = netdata_thread_tag(); |
| 246 | locker->refcount = 1; |
| 247 | locker->lock = lock_type; |
| 248 | locker->got_it = false; |
| 249 | locker->file = file; |
| 250 | locker->function = function; |
| 251 | locker->line = line; |
| 252 | |
| 253 | __netdata_mutex_lock(&rwlock->lockers_mutex); |
| 254 | DOUBLE_LINKED_LIST_APPEND_UNSAFE(rwlock->lockers, locker, prev, next); |
| 255 | Pvoid_t *PValue = JudyLIns(&rwlock->lockers_pid_JudyL, locker->pid, PJE0); |
| 256 | *PValue = locker; |
| 257 | if (lock_type == RWLOCK_REQUEST_READ || lock_type == RWLOCK_REQUEST_TRYREAD) rwlock->readers++; |
| 258 | if (lock_type == RWLOCK_REQUEST_WRITE || lock_type == RWLOCK_REQUEST_TRYWRITE) rwlock->writers++; |
| 259 | __netdata_mutex_unlock(&rwlock->lockers_mutex); |
| 260 | } |
| 261 | |
| 262 | return locker; |
| 263 | } |
| 264 | |
| 265 | static void remove_rwlock_locker(const char *file __maybe_unused, const char *function __maybe_unused, const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock, netdata_rwlock_locker *locker) { |
| 266 | __netdata_mutex_lock(&rwlock->lockers_mutex); |
| 267 | locker->refcount--; |
| 268 | if(!locker->refcount) { |
| 269 | DOUBLE_LINKED_LIST_REMOVE_UNSAFE(rwlock->lockers, locker, prev, next); |
| 270 | JudyLDel(&rwlock->lockers_pid_JudyL, locker->pid, PJE0); |
| 271 | if (locker->lock == RWLOCK_REQUEST_READ || locker->lock == RWLOCK_REQUEST_TRYREAD) rwlock->readers--; |
| 272 | else if (locker->lock == RWLOCK_REQUEST_WRITE || locker->lock == RWLOCK_REQUEST_TRYWRITE) rwlock->writers--; |
| 273 | freez(locker); |
| 274 | } |
| 275 | __netdata_mutex_unlock(&rwlock->lockers_mutex); |
| 276 | } |
| 277 | |
| 278 | // ---------------------------------------------------------------------------- |
| 279 | // debug versions of rwlock |
| 280 | |
| 281 | int netdata_rwlock_destroy_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 282 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 283 | |
| 284 | int ret = __netdata_rwlock_destroy(rwlock); |
| 285 | if(!ret) { |
| 286 | while (rwlock->lockers) |
| 287 | remove_rwlock_locker(file, function, line, rwlock, rwlock->lockers); |
| 288 | } |
| 289 | |
| 290 | return ret; |
| 291 | } |
| 292 | |
| 293 | int netdata_rwlock_init_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 294 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 295 | |
| 296 | int ret = __netdata_rwlock_init(rwlock); |
| 297 | if(!ret) { |
| 298 | __netdata_mutex_init(&rwlock->lockers_mutex); |
| 299 | rwlock->lockers_pid_JudyL = NULL; |
| 300 | rwlock->lockers = NULL; |
| 301 | rwlock->readers = 0; |
| 302 | rwlock->writers = 0; |
| 303 | } |
| 304 | |
| 305 | return ret; |
| 306 | } |
| 307 | |
| 308 | int netdata_rwlock_rdlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 309 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 310 | |
| 311 | netdata_rwlock_locker *locker = add_rwlock_locker(file, function, line, rwlock, RWLOCK_REQUEST_READ); |
| 312 | |
| 313 | int ret = __netdata_rwlock_rdlock(rwlock); |
| 314 | if(!ret) |
| 315 | locker->got_it = true; |
| 316 | else |
| 317 | remove_rwlock_locker(file, function, line, rwlock, locker); |
| 318 | |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | int netdata_rwlock_wrlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 323 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 324 | |
| 325 | netdata_rwlock_locker *locker = add_rwlock_locker(file, function, line, rwlock, RWLOCK_REQUEST_WRITE); |
| 326 | |
| 327 | int ret = __netdata_rwlock_wrlock(rwlock); |
| 328 | if(!ret) |
| 329 | locker->got_it = true; |
| 330 | else |
| 331 | remove_rwlock_locker(file, function, line, rwlock, locker); |
| 332 | |
| 333 | return ret; |
| 334 | } |
| 335 | |
| 336 | int netdata_rwlock_rdunlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 337 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 338 | |
| 339 | netdata_rwlock_locker *locker = find_rwlock_locker(file, function, line, rwlock); |
| 340 | |
| 341 | if(unlikely(!locker)) |
| 342 | fatal("UNLOCK WITHOUT LOCK"); |
| 343 | |
| 344 | int ret = __netdata_rwlock_rdunlock(rwlock); |
| 345 | if(likely(!ret)) |
| 346 | remove_rwlock_locker(file, function, line, rwlock, locker); |
| 347 | |
| 348 | return ret; |
| 349 | } |
| 350 | |
| 351 | int netdata_rwlock_wrunlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 352 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 353 | |
| 354 | netdata_rwlock_locker *locker = find_rwlock_locker(file, function, line, rwlock); |
| 355 | |
| 356 | if(unlikely(!locker)) |
| 357 | fatal("UNLOCK WITHOUT LOCK"); |
| 358 | |
| 359 | int ret = __netdata_rwlock_wrunlock(rwlock); |
| 360 | if(likely(!ret)) |
| 361 | remove_rwlock_locker(file, function, line, rwlock, locker); |
| 362 | |
| 363 | return ret; |
| 364 | } |
| 365 | |
| 366 | int netdata_rwlock_tryrdlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 367 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 368 | |
| 369 | netdata_rwlock_locker *locker = add_rwlock_locker(file, function, line, rwlock, RWLOCK_REQUEST_TRYREAD); |
| 370 | |
| 371 | int ret = __netdata_rwlock_tryrdlock(rwlock); |
| 372 | if(!ret) |
| 373 | locker->got_it = true; |
| 374 | else |
| 375 | remove_rwlock_locker(file, function, line, rwlock, locker); |
| 376 | |
| 377 | return ret; |
| 378 | } |
| 379 | |
| 380 | int netdata_rwlock_trywrlock_debug(const char *file __maybe_unused, const char *function __maybe_unused, |
| 381 | const unsigned long line __maybe_unused, netdata_rwlock_t *rwlock) { |
| 382 | |
| 383 | netdata_rwlock_locker *locker = add_rwlock_locker(file, function, line, rwlock, RWLOCK_REQUEST_TRYWRITE); |
| 384 | |
| 385 | int ret = __netdata_rwlock_trywrlock(rwlock); |
| 386 | if(!ret) |
| 387 | locker->got_it = true; |
| 388 | else |
| 389 | remove_rwlock_locker(file, function, line, rwlock, locker); |
| 390 | |
| 391 | return ret; |
| 392 | } |
| 393 | |
| 394 | #endif // NETDATA_TRACE_RWLOCKS |