1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005 Robert N. M. Watson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/sysctl.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 41 #include "memstat.h" 42 #include "memstat_internal.h" 43 44 const char * 45 memstat_strerror(int error) 46 { 47 48 switch (error) { 49 case MEMSTAT_ERROR_NOMEMORY: 50 return ("Cannot allocate memory"); 51 case MEMSTAT_ERROR_VERSION: 52 return ("Version mismatch"); 53 case MEMSTAT_ERROR_PERMISSION: 54 return ("Permission denied"); 55 case MEMSTAT_ERROR_DATAERROR: 56 return ("Data format error"); 57 case MEMSTAT_ERROR_KVM: 58 return ("KVM error"); 59 case MEMSTAT_ERROR_KVM_NOSYMBOL: 60 return ("KVM unable to find symbol"); 61 case MEMSTAT_ERROR_KVM_SHORTREAD: 62 return ("KVM short read"); 63 case MEMSTAT_ERROR_UNDEFINED: 64 default: 65 return ("Unknown error"); 66 } 67 } 68 69 struct memory_type_list * 70 memstat_mtl_alloc(void) 71 { 72 struct memory_type_list *mtlp; 73 74 mtlp = malloc(sizeof(*mtlp)); 75 if (mtlp == NULL) 76 return (NULL); 77 78 LIST_INIT(&mtlp->mtl_list); 79 mtlp->mtl_error = MEMSTAT_ERROR_UNDEFINED; 80 return (mtlp); 81 } 82 83 struct memory_type * 84 memstat_mtl_first(struct memory_type_list *list) 85 { 86 87 return (LIST_FIRST(&list->mtl_list)); 88 } 89 90 struct memory_type * 91 memstat_mtl_next(struct memory_type *mtp) 92 { 93 94 return (LIST_NEXT(mtp, mt_list)); 95 } 96 97 void 98 _memstat_mtl_empty(struct memory_type_list *list) 99 { 100 struct memory_type *mtp; 101 102 while ((mtp = LIST_FIRST(&list->mtl_list))) { 103 free(mtp->mt_percpu_alloc); 104 free(mtp->mt_percpu_cache); 105 LIST_REMOVE(mtp, mt_list); 106 free(mtp); 107 } 108 } 109 110 void 111 memstat_mtl_free(struct memory_type_list *list) 112 { 113 114 _memstat_mtl_empty(list); 115 free(list); 116 } 117 118 int 119 memstat_mtl_geterror(struct memory_type_list *list) 120 { 121 122 return (list->mtl_error); 123 } 124 125 /* 126 * Look for an existing memory_type entry in a memory_type list, based on the 127 * allocator and name of the type. If not found, return NULL. No errno or 128 * memstat error. 129 */ 130 struct memory_type * 131 memstat_mtl_find(struct memory_type_list *list, int allocator, 132 const char *name) 133 { 134 struct memory_type *mtp; 135 136 LIST_FOREACH(mtp, &list->mtl_list, mt_list) { 137 if ((mtp->mt_allocator == allocator || 138 allocator == ALLOCATOR_ANY) && 139 strcmp(mtp->mt_name, name) == 0) 140 return (mtp); 141 } 142 return (NULL); 143 } 144 145 /* 146 * Allocate a new memory_type with the specificed allocator type and name, 147 * then insert into the list. The structure will be zero'd. 148 * 149 * libmemstat(3) internal function. 150 */ 151 struct memory_type * 152 _memstat_mt_allocate(struct memory_type_list *list, int allocator, 153 const char *name, int maxcpus) 154 { 155 struct memory_type *mtp; 156 157 mtp = malloc(sizeof(*mtp)); 158 if (mtp == NULL) 159 return (NULL); 160 161 bzero(mtp, sizeof(*mtp)); 162 163 mtp->mt_allocator = allocator; 164 mtp->mt_percpu_alloc = malloc(sizeof(struct mt_percpu_alloc_s) * 165 maxcpus); 166 mtp->mt_percpu_cache = malloc(sizeof(struct mt_percpu_cache_s) * 167 maxcpus); 168 strlcpy(mtp->mt_name, name, MEMTYPE_MAXNAME); 169 LIST_INSERT_HEAD(&list->mtl_list, mtp, mt_list); 170 return (mtp); 171 } 172 173 /* 174 * Reset any libmemstat(3)-owned statistics in a memory_type record so that 175 * it can be reused without incremental addition problems. Caller-owned 176 * memory is left "as-is", and must be updated by the caller if desired. 177 * 178 * libmemstat(3) internal function. 179 */ 180 void 181 _memstat_mt_reset_stats(struct memory_type *mtp, int maxcpus) 182 { 183 int i; 184 185 mtp->mt_countlimit = 0; 186 mtp->mt_byteslimit = 0; 187 mtp->mt_sizemask = 0; 188 mtp->mt_size = 0; 189 190 mtp->mt_memalloced = 0; 191 mtp->mt_memfreed = 0; 192 mtp->mt_numallocs = 0; 193 mtp->mt_numfrees = 0; 194 mtp->mt_bytes = 0; 195 mtp->mt_count = 0; 196 mtp->mt_free = 0; 197 mtp->mt_failures = 0; 198 mtp->mt_sleeps = 0; 199 200 mtp->mt_zonefree = 0; 201 mtp->mt_kegfree = 0; 202 203 for (i = 0; i < maxcpus; i++) { 204 mtp->mt_percpu_alloc[i].mtp_memalloced = 0; 205 mtp->mt_percpu_alloc[i].mtp_memfreed = 0; 206 mtp->mt_percpu_alloc[i].mtp_numallocs = 0; 207 mtp->mt_percpu_alloc[i].mtp_numfrees = 0; 208 mtp->mt_percpu_alloc[i].mtp_sizemask = 0; 209 mtp->mt_percpu_cache[i].mtp_free = 0; 210 } 211 } 212 213 /* 214 * Accessor methods for struct memory_type. Avoids encoding the structure 215 * ABI into the application. 216 */ 217 const char * 218 memstat_get_name(const struct memory_type *mtp) 219 { 220 221 return (mtp->mt_name); 222 } 223 224 int 225 memstat_get_allocator(const struct memory_type *mtp) 226 { 227 228 return (mtp->mt_allocator); 229 } 230 231 uint64_t 232 memstat_get_countlimit(const struct memory_type *mtp) 233 { 234 235 return (mtp->mt_countlimit); 236 } 237 238 uint64_t 239 memstat_get_byteslimit(const struct memory_type *mtp) 240 { 241 242 return (mtp->mt_byteslimit); 243 } 244 245 uint64_t 246 memstat_get_sizemask(const struct memory_type *mtp) 247 { 248 249 return (mtp->mt_sizemask); 250 } 251 252 uint64_t 253 memstat_get_size(const struct memory_type *mtp) 254 { 255 256 return (mtp->mt_size); 257 } 258 259 uint64_t 260 memstat_get_rsize(const struct memory_type *mtp) 261 { 262 263 return (mtp->mt_rsize); 264 } 265 266 uint64_t 267 memstat_get_memalloced(const struct memory_type *mtp) 268 { 269 270 return (mtp->mt_memalloced); 271 } 272 273 uint64_t 274 memstat_get_memfreed(const struct memory_type *mtp) 275 { 276 277 return (mtp->mt_memfreed); 278 } 279 280 uint64_t 281 memstat_get_numallocs(const struct memory_type *mtp) 282 { 283 284 return (mtp->mt_numallocs); 285 } 286 287 uint64_t 288 memstat_get_numfrees(const struct memory_type *mtp) 289 { 290 291 return (mtp->mt_numfrees); 292 } 293 294 uint64_t 295 memstat_get_bytes(const struct memory_type *mtp) 296 { 297 298 return (mtp->mt_bytes); 299 } 300 301 uint64_t 302 memstat_get_count(const struct memory_type *mtp) 303 { 304 305 return (mtp->mt_count); 306 } 307 308 uint64_t 309 memstat_get_free(const struct memory_type *mtp) 310 { 311 312 return (mtp->mt_free); 313 } 314 315 uint64_t 316 memstat_get_failures(const struct memory_type *mtp) 317 { 318 319 return (mtp->mt_failures); 320 } 321 322 uint64_t 323 memstat_get_sleeps(const struct memory_type *mtp) 324 { 325 326 return (mtp->mt_sleeps); 327 } 328 329 uint64_t 330 memstat_get_xdomain(const struct memory_type *mtp) 331 { 332 333 return (mtp->mt_xdomain); 334 } 335 336 void * 337 memstat_get_caller_pointer(const struct memory_type *mtp, int index) 338 { 339 340 return (mtp->mt_caller_pointer[index]); 341 } 342 343 void 344 memstat_set_caller_pointer(struct memory_type *mtp, int index, void *value) 345 { 346 347 mtp->mt_caller_pointer[index] = value; 348 } 349 350 uint64_t 351 memstat_get_caller_uint64(const struct memory_type *mtp, int index) 352 { 353 354 return (mtp->mt_caller_uint64[index]); 355 } 356 357 void 358 memstat_set_caller_uint64(struct memory_type *mtp, int index, uint64_t value) 359 { 360 361 mtp->mt_caller_uint64[index] = value; 362 } 363 364 uint64_t 365 memstat_get_zonefree(const struct memory_type *mtp) 366 { 367 368 return (mtp->mt_zonefree); 369 } 370 371 uint64_t 372 memstat_get_kegfree(const struct memory_type *mtp) 373 { 374 375 return (mtp->mt_kegfree); 376 } 377 378 uint64_t 379 memstat_get_percpu_memalloced(const struct memory_type *mtp, int cpu) 380 { 381 382 return (mtp->mt_percpu_alloc[cpu].mtp_memalloced); 383 } 384 385 uint64_t 386 memstat_get_percpu_memfreed(const struct memory_type *mtp, int cpu) 387 { 388 389 return (mtp->mt_percpu_alloc[cpu].mtp_memfreed); 390 } 391 392 uint64_t 393 memstat_get_percpu_numallocs(const struct memory_type *mtp, int cpu) 394 { 395 396 return (mtp->mt_percpu_alloc[cpu].mtp_numallocs); 397 } 398 399 uint64_t 400 memstat_get_percpu_numfrees(const struct memory_type *mtp, int cpu) 401 { 402 403 return (mtp->mt_percpu_alloc[cpu].mtp_numfrees); 404 } 405 406 uint64_t 407 memstat_get_percpu_sizemask(const struct memory_type *mtp, int cpu) 408 { 409 410 return (mtp->mt_percpu_alloc[cpu].mtp_sizemask); 411 } 412 413 void * 414 memstat_get_percpu_caller_pointer(const struct memory_type *mtp, int cpu, 415 int index) 416 { 417 418 return (mtp->mt_percpu_alloc[cpu].mtp_caller_pointer[index]); 419 } 420 421 void 422 memstat_set_percpu_caller_pointer(struct memory_type *mtp, int cpu, 423 int index, void *value) 424 { 425 426 mtp->mt_percpu_alloc[cpu].mtp_caller_pointer[index] = value; 427 } 428 429 uint64_t 430 memstat_get_percpu_caller_uint64(const struct memory_type *mtp, int cpu, 431 int index) 432 { 433 434 return (mtp->mt_percpu_alloc[cpu].mtp_caller_uint64[index]); 435 } 436 437 void 438 memstat_set_percpu_caller_uint64(struct memory_type *mtp, int cpu, int index, 439 uint64_t value) 440 { 441 442 mtp->mt_percpu_alloc[cpu].mtp_caller_uint64[index] = value; 443 } 444 445 uint64_t 446 memstat_get_percpu_free(const struct memory_type *mtp, int cpu) 447 { 448 449 return (mtp->mt_percpu_cache[cpu].mtp_free); 450 } 451