Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1 | /* |
| 2 | * page-types: Tool for querying page flags |
| 3 | * |
| 4 | * Copyright (C) 2009 Intel corporation |
| 5 | * Copyright (C) 2009 Wu Fengguang <fengguang.wu@intel.com> |
| 6 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <unistd.h> |
| 11 | #include <stdint.h> |
| 12 | #include <stdarg.h> |
| 13 | #include <string.h> |
| 14 | #include <getopt.h> |
| 15 | #include <limits.h> |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/errno.h> |
| 18 | #include <sys/fcntl.h> |
| 19 | |
| 20 | |
| 21 | /* |
| 22 | * kernel page flags |
| 23 | */ |
| 24 | |
| 25 | #define KPF_BYTES 8 |
| 26 | #define PROC_KPAGEFLAGS "/proc/kpageflags" |
| 27 | |
| 28 | /* copied from kpageflags_read() */ |
| 29 | #define KPF_LOCKED 0 |
| 30 | #define KPF_ERROR 1 |
| 31 | #define KPF_REFERENCED 2 |
| 32 | #define KPF_UPTODATE 3 |
| 33 | #define KPF_DIRTY 4 |
| 34 | #define KPF_LRU 5 |
| 35 | #define KPF_ACTIVE 6 |
| 36 | #define KPF_SLAB 7 |
| 37 | #define KPF_WRITEBACK 8 |
| 38 | #define KPF_RECLAIM 9 |
| 39 | #define KPF_BUDDY 10 |
| 40 | |
| 41 | /* [11-20] new additions in 2.6.31 */ |
| 42 | #define KPF_MMAP 11 |
| 43 | #define KPF_ANON 12 |
| 44 | #define KPF_SWAPCACHE 13 |
| 45 | #define KPF_SWAPBACKED 14 |
| 46 | #define KPF_COMPOUND_HEAD 15 |
| 47 | #define KPF_COMPOUND_TAIL 16 |
| 48 | #define KPF_HUGE 17 |
| 49 | #define KPF_UNEVICTABLE 18 |
| 50 | #define KPF_NOPAGE 20 |
| 51 | |
| 52 | /* [32-] kernel hacking assistances */ |
| 53 | #define KPF_RESERVED 32 |
| 54 | #define KPF_MLOCKED 33 |
| 55 | #define KPF_MAPPEDTODISK 34 |
| 56 | #define KPF_PRIVATE 35 |
| 57 | #define KPF_PRIVATE_2 36 |
| 58 | #define KPF_OWNER_PRIVATE 37 |
| 59 | #define KPF_ARCH 38 |
| 60 | #define KPF_UNCACHED 39 |
| 61 | |
| 62 | /* [48-] take some arbitrary free slots for expanding overloaded flags |
| 63 | * not part of kernel API |
| 64 | */ |
| 65 | #define KPF_READAHEAD 48 |
| 66 | #define KPF_SLOB_FREE 49 |
| 67 | #define KPF_SLUB_FROZEN 50 |
| 68 | #define KPF_SLUB_DEBUG 51 |
| 69 | |
| 70 | #define KPF_ALL_BITS ((uint64_t)~0ULL) |
| 71 | #define KPF_HACKERS_BITS (0xffffULL << 32) |
| 72 | #define KPF_OVERLOADED_BITS (0xffffULL << 48) |
| 73 | #define BIT(name) (1ULL << KPF_##name) |
| 74 | #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) |
| 75 | |
| 76 | static char *page_flag_names[] = { |
| 77 | [KPF_LOCKED] = "L:locked", |
| 78 | [KPF_ERROR] = "E:error", |
| 79 | [KPF_REFERENCED] = "R:referenced", |
| 80 | [KPF_UPTODATE] = "U:uptodate", |
| 81 | [KPF_DIRTY] = "D:dirty", |
| 82 | [KPF_LRU] = "l:lru", |
| 83 | [KPF_ACTIVE] = "A:active", |
| 84 | [KPF_SLAB] = "S:slab", |
| 85 | [KPF_WRITEBACK] = "W:writeback", |
| 86 | [KPF_RECLAIM] = "I:reclaim", |
| 87 | [KPF_BUDDY] = "B:buddy", |
| 88 | |
| 89 | [KPF_MMAP] = "M:mmap", |
| 90 | [KPF_ANON] = "a:anonymous", |
| 91 | [KPF_SWAPCACHE] = "s:swapcache", |
| 92 | [KPF_SWAPBACKED] = "b:swapbacked", |
| 93 | [KPF_COMPOUND_HEAD] = "H:compound_head", |
| 94 | [KPF_COMPOUND_TAIL] = "T:compound_tail", |
| 95 | [KPF_HUGE] = "G:huge", |
| 96 | [KPF_UNEVICTABLE] = "u:unevictable", |
| 97 | [KPF_NOPAGE] = "n:nopage", |
| 98 | |
| 99 | [KPF_RESERVED] = "r:reserved", |
| 100 | [KPF_MLOCKED] = "m:mlocked", |
| 101 | [KPF_MAPPEDTODISK] = "d:mappedtodisk", |
| 102 | [KPF_PRIVATE] = "P:private", |
| 103 | [KPF_PRIVATE_2] = "p:private_2", |
| 104 | [KPF_OWNER_PRIVATE] = "O:owner_private", |
| 105 | [KPF_ARCH] = "h:arch", |
| 106 | [KPF_UNCACHED] = "c:uncached", |
| 107 | |
| 108 | [KPF_READAHEAD] = "I:readahead", |
| 109 | [KPF_SLOB_FREE] = "P:slob_free", |
| 110 | [KPF_SLUB_FROZEN] = "A:slub_frozen", |
| 111 | [KPF_SLUB_DEBUG] = "E:slub_debug", |
| 112 | }; |
| 113 | |
| 114 | |
| 115 | /* |
| 116 | * data structures |
| 117 | */ |
| 118 | |
| 119 | static int opt_raw; /* for kernel developers */ |
| 120 | static int opt_list; /* list pages (in ranges) */ |
| 121 | static int opt_no_summary; /* don't show summary */ |
| 122 | static pid_t opt_pid; /* process to walk */ |
| 123 | |
| 124 | #define MAX_ADDR_RANGES 1024 |
| 125 | static int nr_addr_ranges; |
| 126 | static unsigned long opt_offset[MAX_ADDR_RANGES]; |
| 127 | static unsigned long opt_size[MAX_ADDR_RANGES]; |
| 128 | |
| 129 | #define MAX_BIT_FILTERS 64 |
| 130 | static int nr_bit_filters; |
| 131 | static uint64_t opt_mask[MAX_BIT_FILTERS]; |
| 132 | static uint64_t opt_bits[MAX_BIT_FILTERS]; |
| 133 | |
| 134 | static int page_size; |
| 135 | |
| 136 | #define PAGES_BATCH (64 << 10) /* 64k pages */ |
| 137 | static int kpageflags_fd; |
| 138 | static uint64_t kpageflags_buf[KPF_BYTES * PAGES_BATCH]; |
| 139 | |
| 140 | #define HASH_SHIFT 13 |
| 141 | #define HASH_SIZE (1 << HASH_SHIFT) |
| 142 | #define HASH_MASK (HASH_SIZE - 1) |
| 143 | #define HASH_KEY(flags) (flags & HASH_MASK) |
| 144 | |
| 145 | static unsigned long total_pages; |
| 146 | static unsigned long nr_pages[HASH_SIZE]; |
| 147 | static uint64_t page_flags[HASH_SIZE]; |
| 148 | |
| 149 | |
| 150 | /* |
| 151 | * helper functions |
| 152 | */ |
| 153 | |
| 154 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
| 155 | |
| 156 | #define min_t(type, x, y) ({ \ |
| 157 | type __min1 = (x); \ |
| 158 | type __min2 = (y); \ |
| 159 | __min1 < __min2 ? __min1 : __min2; }) |
| 160 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 161 | static unsigned long pages2mb(unsigned long pages) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 162 | { |
| 163 | return (pages * page_size) >> 20; |
| 164 | } |
| 165 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 166 | static void fatal(const char *x, ...) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 167 | { |
| 168 | va_list ap; |
| 169 | |
| 170 | va_start(ap, x); |
| 171 | vfprintf(stderr, x, ap); |
| 172 | va_end(ap); |
| 173 | exit(EXIT_FAILURE); |
| 174 | } |
| 175 | |
| 176 | |
| 177 | /* |
| 178 | * page flag names |
| 179 | */ |
| 180 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 181 | static char *page_flag_name(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 182 | { |
| 183 | static char buf[65]; |
| 184 | int present; |
| 185 | int i, j; |
| 186 | |
| 187 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 188 | present = (flags >> i) & 1; |
| 189 | if (!page_flag_names[i]) { |
| 190 | if (present) |
| 191 | fatal("unkown flag bit %d\n", i); |
| 192 | continue; |
| 193 | } |
| 194 | buf[j++] = present ? page_flag_names[i][0] : '_'; |
| 195 | } |
| 196 | |
| 197 | return buf; |
| 198 | } |
| 199 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 200 | static char *page_flag_longname(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 201 | { |
| 202 | static char buf[1024]; |
| 203 | int i, n; |
| 204 | |
| 205 | for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 206 | if (!page_flag_names[i]) |
| 207 | continue; |
| 208 | if ((flags >> i) & 1) |
| 209 | n += snprintf(buf + n, sizeof(buf) - n, "%s,", |
| 210 | page_flag_names[i] + 2); |
| 211 | } |
| 212 | if (n) |
| 213 | n--; |
| 214 | buf[n] = '\0'; |
| 215 | |
| 216 | return buf; |
| 217 | } |
| 218 | |
| 219 | |
| 220 | /* |
| 221 | * page list and summary |
| 222 | */ |
| 223 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 224 | static void show_page_range(unsigned long offset, uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 225 | { |
| 226 | static uint64_t flags0; |
| 227 | static unsigned long index; |
| 228 | static unsigned long count; |
| 229 | |
| 230 | if (flags == flags0 && offset == index + count) { |
| 231 | count++; |
| 232 | return; |
| 233 | } |
| 234 | |
| 235 | if (count) |
| 236 | printf("%lu\t%lu\t%s\n", |
| 237 | index, count, page_flag_name(flags0)); |
| 238 | |
| 239 | flags0 = flags; |
| 240 | index = offset; |
| 241 | count = 1; |
| 242 | } |
| 243 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 244 | static void show_page(unsigned long offset, uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 245 | { |
| 246 | printf("%lu\t%s\n", offset, page_flag_name(flags)); |
| 247 | } |
| 248 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 249 | static void show_summary(void) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 250 | { |
| 251 | int i; |
| 252 | |
| 253 | printf(" flags\tpage-count MB" |
| 254 | " symbolic-flags\t\t\tlong-symbolic-flags\n"); |
| 255 | |
| 256 | for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { |
| 257 | if (nr_pages[i]) |
| 258 | printf("0x%016llx\t%10lu %8lu %s\t%s\n", |
| 259 | (unsigned long long)page_flags[i], |
| 260 | nr_pages[i], |
| 261 | pages2mb(nr_pages[i]), |
| 262 | page_flag_name(page_flags[i]), |
| 263 | page_flag_longname(page_flags[i])); |
| 264 | } |
| 265 | |
| 266 | printf(" total\t%10lu %8lu\n", |
| 267 | total_pages, pages2mb(total_pages)); |
| 268 | } |
| 269 | |
| 270 | |
| 271 | /* |
| 272 | * page flag filters |
| 273 | */ |
| 274 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 275 | static int bit_mask_ok(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 276 | { |
| 277 | int i; |
| 278 | |
| 279 | for (i = 0; i < nr_bit_filters; i++) { |
| 280 | if (opt_bits[i] == KPF_ALL_BITS) { |
| 281 | if ((flags & opt_mask[i]) == 0) |
| 282 | return 0; |
| 283 | } else { |
| 284 | if ((flags & opt_mask[i]) != opt_bits[i]) |
| 285 | return 0; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | return 1; |
| 290 | } |
| 291 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 292 | static uint64_t expand_overloaded_flags(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 293 | { |
| 294 | /* SLOB/SLUB overload several page flags */ |
| 295 | if (flags & BIT(SLAB)) { |
| 296 | if (flags & BIT(PRIVATE)) |
| 297 | flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); |
| 298 | if (flags & BIT(ACTIVE)) |
| 299 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); |
| 300 | if (flags & BIT(ERROR)) |
| 301 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); |
| 302 | } |
| 303 | |
| 304 | /* PG_reclaim is overloaded as PG_readahead in the read path */ |
| 305 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) |
| 306 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); |
| 307 | |
| 308 | return flags; |
| 309 | } |
| 310 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 311 | static uint64_t well_known_flags(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 312 | { |
| 313 | /* hide flags intended only for kernel hacker */ |
| 314 | flags &= ~KPF_HACKERS_BITS; |
| 315 | |
| 316 | /* hide non-hugeTLB compound pages */ |
| 317 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) |
| 318 | flags &= ~BITS_COMPOUND; |
| 319 | |
| 320 | return flags; |
| 321 | } |
| 322 | |
| 323 | |
| 324 | /* |
| 325 | * page frame walker |
| 326 | */ |
| 327 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 328 | static int hash_slot(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 329 | { |
| 330 | int k = HASH_KEY(flags); |
| 331 | int i; |
| 332 | |
| 333 | /* Explicitly reserve slot 0 for flags 0: the following logic |
| 334 | * cannot distinguish an unoccupied slot from slot (flags==0). |
| 335 | */ |
| 336 | if (flags == 0) |
| 337 | return 0; |
| 338 | |
| 339 | /* search through the remaining (HASH_SIZE-1) slots */ |
| 340 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { |
| 341 | if (!k || k >= ARRAY_SIZE(page_flags)) |
| 342 | k = 1; |
| 343 | if (page_flags[k] == 0) { |
| 344 | page_flags[k] = flags; |
| 345 | return k; |
| 346 | } |
| 347 | if (page_flags[k] == flags) |
| 348 | return k; |
| 349 | } |
| 350 | |
| 351 | fatal("hash table full: bump up HASH_SHIFT?\n"); |
| 352 | exit(EXIT_FAILURE); |
| 353 | } |
| 354 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 355 | static void add_page(unsigned long offset, uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 356 | { |
| 357 | flags = expand_overloaded_flags(flags); |
| 358 | |
| 359 | if (!opt_raw) |
| 360 | flags = well_known_flags(flags); |
| 361 | |
| 362 | if (!bit_mask_ok(flags)) |
| 363 | return; |
| 364 | |
| 365 | if (opt_list == 1) |
| 366 | show_page_range(offset, flags); |
| 367 | else if (opt_list == 2) |
| 368 | show_page(offset, flags); |
| 369 | |
| 370 | nr_pages[hash_slot(flags)]++; |
| 371 | total_pages++; |
| 372 | } |
| 373 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 374 | static void walk_pfn(unsigned long index, unsigned long count) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 375 | { |
| 376 | unsigned long batch; |
| 377 | unsigned long n; |
| 378 | unsigned long i; |
| 379 | |
| 380 | if (index > ULONG_MAX / KPF_BYTES) |
| 381 | fatal("index overflow: %lu\n", index); |
| 382 | |
| 383 | lseek(kpageflags_fd, index * KPF_BYTES, SEEK_SET); |
| 384 | |
| 385 | while (count) { |
| 386 | batch = min_t(unsigned long, count, PAGES_BATCH); |
| 387 | n = read(kpageflags_fd, kpageflags_buf, batch * KPF_BYTES); |
| 388 | if (n == 0) |
| 389 | break; |
| 390 | if (n < 0) { |
| 391 | perror(PROC_KPAGEFLAGS); |
| 392 | exit(EXIT_FAILURE); |
| 393 | } |
| 394 | |
| 395 | if (n % KPF_BYTES != 0) |
| 396 | fatal("partial read: %lu bytes\n", n); |
| 397 | n = n / KPF_BYTES; |
| 398 | |
| 399 | for (i = 0; i < n; i++) |
| 400 | add_page(index + i, kpageflags_buf[i]); |
| 401 | |
| 402 | index += batch; |
| 403 | count -= batch; |
| 404 | } |
| 405 | } |
| 406 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 407 | static void walk_addr_ranges(void) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 408 | { |
| 409 | int i; |
| 410 | |
| 411 | kpageflags_fd = open(PROC_KPAGEFLAGS, O_RDONLY); |
| 412 | if (kpageflags_fd < 0) { |
| 413 | perror(PROC_KPAGEFLAGS); |
| 414 | exit(EXIT_FAILURE); |
| 415 | } |
| 416 | |
| 417 | if (!nr_addr_ranges) |
| 418 | walk_pfn(0, ULONG_MAX); |
| 419 | |
| 420 | for (i = 0; i < nr_addr_ranges; i++) |
| 421 | walk_pfn(opt_offset[i], opt_size[i]); |
| 422 | |
| 423 | close(kpageflags_fd); |
| 424 | } |
| 425 | |
| 426 | |
| 427 | /* |
| 428 | * user interface |
| 429 | */ |
| 430 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 431 | static const char *page_flag_type(uint64_t flag) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 432 | { |
| 433 | if (flag & KPF_HACKERS_BITS) |
| 434 | return "(r)"; |
| 435 | if (flag & KPF_OVERLOADED_BITS) |
| 436 | return "(o)"; |
| 437 | return " "; |
| 438 | } |
| 439 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 440 | static void usage(void) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 441 | { |
| 442 | int i, j; |
| 443 | |
| 444 | printf( |
| 445 | "page-types [options]\n" |
| 446 | " -r|--raw Raw mode, for kernel developers\n" |
| 447 | " -a|--addr addr-spec Walk a range of pages\n" |
| 448 | " -b|--bits bits-spec Walk pages with specified bits\n" |
| 449 | #if 0 /* planned features */ |
| 450 | " -p|--pid pid Walk process address space\n" |
| 451 | " -f|--file filename Walk file address space\n" |
| 452 | #endif |
| 453 | " -l|--list Show page details in ranges\n" |
| 454 | " -L|--list-each Show page details one by one\n" |
| 455 | " -N|--no-summary Don't show summay info\n" |
| 456 | " -h|--help Show this usage message\n" |
| 457 | "addr-spec:\n" |
| 458 | " N one page at offset N (unit: pages)\n" |
| 459 | " N+M pages range from N to N+M-1\n" |
| 460 | " N,M pages range from N to M-1\n" |
| 461 | " N, pages range from N to end\n" |
| 462 | " ,M pages range from 0 to M\n" |
| 463 | "bits-spec:\n" |
| 464 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
| 465 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" |
| 466 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" |
| 467 | " =bit1,bit2 flags == (bit1|bit2)\n" |
| 468 | "bit-names:\n" |
| 469 | ); |
| 470 | |
| 471 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 472 | if (!page_flag_names[i]) |
| 473 | continue; |
| 474 | printf("%16s%s", page_flag_names[i] + 2, |
| 475 | page_flag_type(1ULL << i)); |
| 476 | if (++j > 3) { |
| 477 | j = 0; |
| 478 | putchar('\n'); |
| 479 | } |
| 480 | } |
| 481 | printf("\n " |
| 482 | "(r) raw mode bits (o) overloaded bits\n"); |
| 483 | } |
| 484 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 485 | static unsigned long long parse_number(const char *str) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 486 | { |
| 487 | unsigned long long n; |
| 488 | |
| 489 | n = strtoll(str, NULL, 0); |
| 490 | |
| 491 | if (n == 0 && str[0] != '0') |
| 492 | fatal("invalid name or number: %s\n", str); |
| 493 | |
| 494 | return n; |
| 495 | } |
| 496 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 497 | static void parse_pid(const char *str) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 498 | { |
| 499 | opt_pid = parse_number(str); |
| 500 | } |
| 501 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 502 | static void parse_file(const char *name) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 503 | { |
| 504 | } |
| 505 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 506 | static void add_addr_range(unsigned long offset, unsigned long size) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 507 | { |
| 508 | if (nr_addr_ranges >= MAX_ADDR_RANGES) |
| 509 | fatal("too much addr ranges\n"); |
| 510 | |
| 511 | opt_offset[nr_addr_ranges] = offset; |
| 512 | opt_size[nr_addr_ranges] = size; |
| 513 | nr_addr_ranges++; |
| 514 | } |
| 515 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 516 | static void parse_addr_range(const char *optarg) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 517 | { |
| 518 | unsigned long offset; |
| 519 | unsigned long size; |
| 520 | char *p; |
| 521 | |
| 522 | p = strchr(optarg, ','); |
| 523 | if (!p) |
| 524 | p = strchr(optarg, '+'); |
| 525 | |
| 526 | if (p == optarg) { |
| 527 | offset = 0; |
| 528 | size = parse_number(p + 1); |
| 529 | } else if (p) { |
| 530 | offset = parse_number(optarg); |
| 531 | if (p[1] == '\0') |
| 532 | size = ULONG_MAX; |
| 533 | else { |
| 534 | size = parse_number(p + 1); |
| 535 | if (*p == ',') { |
| 536 | if (size < offset) |
| 537 | fatal("invalid range: %lu,%lu\n", |
| 538 | offset, size); |
| 539 | size -= offset; |
| 540 | } |
| 541 | } |
| 542 | } else { |
| 543 | offset = parse_number(optarg); |
| 544 | size = 1; |
| 545 | } |
| 546 | |
| 547 | add_addr_range(offset, size); |
| 548 | } |
| 549 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 550 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 551 | { |
| 552 | if (nr_bit_filters >= MAX_BIT_FILTERS) |
| 553 | fatal("too much bit filters\n"); |
| 554 | |
| 555 | opt_mask[nr_bit_filters] = mask; |
| 556 | opt_bits[nr_bit_filters] = bits; |
| 557 | nr_bit_filters++; |
| 558 | } |
| 559 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 560 | static uint64_t parse_flag_name(const char *str, int len) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 561 | { |
| 562 | int i; |
| 563 | |
| 564 | if (!*str || !len) |
| 565 | return 0; |
| 566 | |
| 567 | if (len <= 8 && !strncmp(str, "compound", len)) |
| 568 | return BITS_COMPOUND; |
| 569 | |
| 570 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 571 | if (!page_flag_names[i]) |
| 572 | continue; |
| 573 | if (!strncmp(str, page_flag_names[i] + 2, len)) |
| 574 | return 1ULL << i; |
| 575 | } |
| 576 | |
| 577 | return parse_number(str); |
| 578 | } |
| 579 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 580 | static uint64_t parse_flag_names(const char *str, int all) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 581 | { |
| 582 | const char *p = str; |
| 583 | uint64_t flags = 0; |
| 584 | |
| 585 | while (1) { |
| 586 | if (*p == ',' || *p == '=' || *p == '\0') { |
| 587 | if ((*str != '~') || (*str == '~' && all && *++str)) |
| 588 | flags |= parse_flag_name(str, p - str); |
| 589 | if (*p != ',') |
| 590 | break; |
| 591 | str = p + 1; |
| 592 | } |
| 593 | p++; |
| 594 | } |
| 595 | |
| 596 | return flags; |
| 597 | } |
| 598 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 599 | static void parse_bits_mask(const char *optarg) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 600 | { |
| 601 | uint64_t mask; |
| 602 | uint64_t bits; |
| 603 | const char *p; |
| 604 | |
| 605 | p = strchr(optarg, '='); |
| 606 | if (p == optarg) { |
| 607 | mask = KPF_ALL_BITS; |
| 608 | bits = parse_flag_names(p + 1, 0); |
| 609 | } else if (p) { |
| 610 | mask = parse_flag_names(optarg, 0); |
| 611 | bits = parse_flag_names(p + 1, 0); |
| 612 | } else if (strchr(optarg, '~')) { |
| 613 | mask = parse_flag_names(optarg, 1); |
| 614 | bits = parse_flag_names(optarg, 0); |
| 615 | } else { |
| 616 | mask = parse_flag_names(optarg, 0); |
| 617 | bits = KPF_ALL_BITS; |
| 618 | } |
| 619 | |
| 620 | add_bits_filter(mask, bits); |
| 621 | } |
| 622 | |
| 623 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame^] | 624 | static struct option opts[] = { |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 625 | { "raw" , 0, NULL, 'r' }, |
| 626 | { "pid" , 1, NULL, 'p' }, |
| 627 | { "file" , 1, NULL, 'f' }, |
| 628 | { "addr" , 1, NULL, 'a' }, |
| 629 | { "bits" , 1, NULL, 'b' }, |
| 630 | { "list" , 0, NULL, 'l' }, |
| 631 | { "list-each" , 0, NULL, 'L' }, |
| 632 | { "no-summary", 0, NULL, 'N' }, |
| 633 | { "help" , 0, NULL, 'h' }, |
| 634 | { NULL , 0, NULL, 0 } |
| 635 | }; |
| 636 | |
| 637 | int main(int argc, char *argv[]) |
| 638 | { |
| 639 | int c; |
| 640 | |
| 641 | page_size = getpagesize(); |
| 642 | |
| 643 | while ((c = getopt_long(argc, argv, |
| 644 | "rp:f:a:b:lLNh", opts, NULL)) != -1) { |
| 645 | switch (c) { |
| 646 | case 'r': |
| 647 | opt_raw = 1; |
| 648 | break; |
| 649 | case 'p': |
| 650 | parse_pid(optarg); |
| 651 | break; |
| 652 | case 'f': |
| 653 | parse_file(optarg); |
| 654 | break; |
| 655 | case 'a': |
| 656 | parse_addr_range(optarg); |
| 657 | break; |
| 658 | case 'b': |
| 659 | parse_bits_mask(optarg); |
| 660 | break; |
| 661 | case 'l': |
| 662 | opt_list = 1; |
| 663 | break; |
| 664 | case 'L': |
| 665 | opt_list = 2; |
| 666 | break; |
| 667 | case 'N': |
| 668 | opt_no_summary = 1; |
| 669 | break; |
| 670 | case 'h': |
| 671 | usage(); |
| 672 | exit(0); |
| 673 | default: |
| 674 | usage(); |
| 675 | exit(1); |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | if (opt_list == 1) |
| 680 | printf("offset\tcount\tflags\n"); |
| 681 | if (opt_list == 2) |
| 682 | printf("offset\tflags\n"); |
| 683 | |
| 684 | walk_addr_ranges(); |
| 685 | |
| 686 | if (opt_list == 1) |
| 687 | show_page_range(0, 0); /* drain the buffer */ |
| 688 | |
| 689 | if (opt_no_summary) |
| 690 | return 0; |
| 691 | |
| 692 | if (opt_list) |
| 693 | printf("\n\n"); |
| 694 | |
| 695 | show_summary(); |
| 696 | |
| 697 | return 0; |
| 698 | } |