Merge tag 'for-6.0/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
[platform/kernel/linux-starfive.git] / tools / vm / page_owner_sort.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * User-space helper to sort the output of /sys/kernel/debug/page_owner
4  *
5  * Example use:
6  * cat /sys/kernel/debug/page_owner > page_owner_full.txt
7  * ./page_owner_sort page_owner_full.txt sorted_page_owner.txt
8  * Or sort by total memory:
9  * ./page_owner_sort -m page_owner_full.txt sorted_page_owner.txt
10  *
11  * See Documentation/mm/page_owner.rst
12 */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <sys/types.h>
17 #include <sys/stat.h>
18 #include <fcntl.h>
19 #include <unistd.h>
20 #include <string.h>
21 #include <regex.h>
22 #include <errno.h>
23 #include <linux/types.h>
24 #include <getopt.h>
25
26 #define bool int
27 #define true 1
28 #define false 0
29 #define TASK_COMM_LEN 16
30
31 struct block_list {
32         char *txt;
33         char *comm; // task command name
34         char *stacktrace;
35         __u64 ts_nsec;
36         __u64 free_ts_nsec;
37         int len;
38         int num;
39         int page_num;
40         pid_t pid;
41         pid_t tgid;
42         int allocator;
43 };
44 enum FILTER_BIT {
45         FILTER_UNRELEASE = 1<<1,
46         FILTER_PID = 1<<2,
47         FILTER_TGID = 1<<3,
48         FILTER_COMM = 1<<4
49 };
50 enum CULL_BIT {
51         CULL_UNRELEASE = 1<<1,
52         CULL_PID = 1<<2,
53         CULL_TGID = 1<<3,
54         CULL_COMM = 1<<4,
55         CULL_STACKTRACE = 1<<5,
56         CULL_ALLOCATOR = 1<<6
57 };
58 enum ALLOCATOR_BIT {
59         ALLOCATOR_CMA = 1<<1,
60         ALLOCATOR_SLAB = 1<<2,
61         ALLOCATOR_VMALLOC = 1<<3,
62         ALLOCATOR_OTHERS = 1<<4
63 };
64 enum ARG_TYPE {
65         ARG_TXT, ARG_COMM, ARG_STACKTRACE, ARG_ALLOC_TS, ARG_FREE_TS,
66         ARG_CULL_TIME, ARG_PAGE_NUM, ARG_PID, ARG_TGID, ARG_UNKNOWN, ARG_FREE,
67         ARG_ALLOCATOR
68 };
69 enum SORT_ORDER {
70         SORT_ASC = 1,
71         SORT_DESC = -1,
72 };
73 struct filter_condition {
74         pid_t *pids;
75         pid_t *tgids;
76         char **comms;
77         int pids_size;
78         int tgids_size;
79         int comms_size;
80 };
81 struct sort_condition {
82         int (**cmps)(const void *, const void *);
83         int *signs;
84         int size;
85 };
86 static struct filter_condition fc;
87 static struct sort_condition sc;
88 static regex_t order_pattern;
89 static regex_t pid_pattern;
90 static regex_t tgid_pattern;
91 static regex_t comm_pattern;
92 static regex_t ts_nsec_pattern;
93 static regex_t free_ts_nsec_pattern;
94 static struct block_list *list;
95 static int list_size;
96 static int max_size;
97 static int cull;
98 static int filter;
99 static bool debug_on;
100
101 static void set_single_cmp(int (*cmp)(const void *, const void *), int sign);
102
103 int read_block(char *buf, char *ext_buf, int buf_size, FILE *fin)
104 {
105         char *curr = buf, *const buf_end = buf + buf_size;
106
107         while (buf_end - curr > 1 && fgets(curr, buf_end - curr, fin)) {
108                 if (*curr == '\n') { /* empty line */
109                         return curr - buf;
110                 }
111                 if (!strncmp(curr, "PFN", 3)) {
112                         strcpy(ext_buf, curr);
113                         continue;
114                 }
115                 curr += strlen(curr);
116         }
117
118         return -1; /* EOF or no space left in buf. */
119 }
120
121 static int compare_txt(const void *p1, const void *p2)
122 {
123         const struct block_list *l1 = p1, *l2 = p2;
124
125         return strcmp(l1->txt, l2->txt);
126 }
127
128 static int compare_stacktrace(const void *p1, const void *p2)
129 {
130         const struct block_list *l1 = p1, *l2 = p2;
131
132         return strcmp(l1->stacktrace, l2->stacktrace);
133 }
134
135 static int compare_num(const void *p1, const void *p2)
136 {
137         const struct block_list *l1 = p1, *l2 = p2;
138
139         return l1->num - l2->num;
140 }
141
142 static int compare_page_num(const void *p1, const void *p2)
143 {
144         const struct block_list *l1 = p1, *l2 = p2;
145
146         return l1->page_num - l2->page_num;
147 }
148
149 static int compare_pid(const void *p1, const void *p2)
150 {
151         const struct block_list *l1 = p1, *l2 = p2;
152
153         return l1->pid - l2->pid;
154 }
155
156 static int compare_tgid(const void *p1, const void *p2)
157 {
158         const struct block_list *l1 = p1, *l2 = p2;
159
160         return l1->tgid - l2->tgid;
161 }
162
163 static int compare_allocator(const void *p1, const void *p2)
164 {
165         const struct block_list *l1 = p1, *l2 = p2;
166
167         return l1->allocator - l2->allocator;
168 }
169
170 static int compare_comm(const void *p1, const void *p2)
171 {
172         const struct block_list *l1 = p1, *l2 = p2;
173
174         return strcmp(l1->comm, l2->comm);
175 }
176
177 static int compare_ts(const void *p1, const void *p2)
178 {
179         const struct block_list *l1 = p1, *l2 = p2;
180
181         return l1->ts_nsec < l2->ts_nsec ? -1 : 1;
182 }
183
184 static int compare_free_ts(const void *p1, const void *p2)
185 {
186         const struct block_list *l1 = p1, *l2 = p2;
187
188         return l1->free_ts_nsec < l2->free_ts_nsec ? -1 : 1;
189 }
190
191 static int compare_release(const void *p1, const void *p2)
192 {
193         const struct block_list *l1 = p1, *l2 = p2;
194
195         if (!l1->free_ts_nsec && !l2->free_ts_nsec)
196                 return 0;
197         if (l1->free_ts_nsec && l2->free_ts_nsec)
198                 return 0;
199         return l1->free_ts_nsec ? 1 : -1;
200 }
201
202 static int compare_cull_condition(const void *p1, const void *p2)
203 {
204         if (cull == 0)
205                 return compare_txt(p1, p2);
206         if ((cull & CULL_STACKTRACE) && compare_stacktrace(p1, p2))
207                 return compare_stacktrace(p1, p2);
208         if ((cull & CULL_PID) && compare_pid(p1, p2))
209                 return compare_pid(p1, p2);
210         if ((cull & CULL_TGID) && compare_tgid(p1, p2))
211                 return compare_tgid(p1, p2);
212         if ((cull & CULL_COMM) && compare_comm(p1, p2))
213                 return compare_comm(p1, p2);
214         if ((cull & CULL_UNRELEASE) && compare_release(p1, p2))
215                 return compare_release(p1, p2);
216         if ((cull & CULL_ALLOCATOR) && compare_allocator(p1, p2))
217                 return compare_allocator(p1, p2);
218         return 0;
219 }
220
221 static int compare_sort_condition(const void *p1, const void *p2)
222 {
223         int cmp = 0;
224
225         for (int i = 0; i < sc.size; ++i)
226                 if (cmp == 0)
227                         cmp = sc.signs[i] * sc.cmps[i](p1, p2);
228         return cmp;
229 }
230
231 static int search_pattern(regex_t *pattern, char *pattern_str, char *buf)
232 {
233         int err, val_len;
234         regmatch_t pmatch[2];
235
236         err = regexec(pattern, buf, 2, pmatch, REG_NOTBOL);
237         if (err != 0 || pmatch[1].rm_so == -1) {
238                 if (debug_on)
239                         fprintf(stderr, "no matching pattern in %s\n", buf);
240                 return -1;
241         }
242         val_len = pmatch[1].rm_eo - pmatch[1].rm_so;
243
244         memcpy(pattern_str, buf + pmatch[1].rm_so, val_len);
245
246         return 0;
247 }
248
249 static void check_regcomp(regex_t *pattern, const char *regex)
250 {
251         int err;
252
253         err = regcomp(pattern, regex, REG_EXTENDED | REG_NEWLINE);
254         if (err != 0 || pattern->re_nsub != 1) {
255                 fprintf(stderr, "Invalid pattern %s code %d\n", regex, err);
256                 exit(1);
257         }
258 }
259
260 static char **explode(char sep, const char *str, int *size)
261 {
262         int count = 0, len = strlen(str);
263         int lastindex = -1, j = 0;
264
265         for (int i = 0; i < len; i++)
266                 if (str[i] == sep)
267                         count++;
268         char **ret = calloc(++count, sizeof(char *));
269
270         for (int i = 0; i < len; i++) {
271                 if (str[i] == sep) {
272                         ret[j] = calloc(i - lastindex, sizeof(char));
273                         memcpy(ret[j++], str + lastindex + 1, i - lastindex - 1);
274                         lastindex = i;
275                 }
276         }
277         if (lastindex <= len - 1) {
278                 ret[j] = calloc(len - lastindex, sizeof(char));
279                 memcpy(ret[j++], str + lastindex + 1, strlen(str) - 1 - lastindex);
280         }
281         *size = j;
282         return ret;
283 }
284
285 static void free_explode(char **arr, int size)
286 {
287         for (int i = 0; i < size; i++)
288                 free(arr[i]);
289         free(arr);
290 }
291
292 # define FIELD_BUFF 25
293
294 static int get_page_num(char *buf)
295 {
296         int order_val;
297         char order_str[FIELD_BUFF] = {0};
298         char *endptr;
299
300         search_pattern(&order_pattern, order_str, buf);
301         errno = 0;
302         order_val = strtol(order_str, &endptr, 10);
303         if (order_val > 64 || errno != 0 || endptr == order_str || *endptr != '\0') {
304                 if (debug_on)
305                         fprintf(stderr, "wrong order in follow buf:\n%s\n", buf);
306                 return 0;
307         }
308
309         return 1 << order_val;
310 }
311
312 static pid_t get_pid(char *buf)
313 {
314         pid_t pid;
315         char pid_str[FIELD_BUFF] = {0};
316         char *endptr;
317
318         search_pattern(&pid_pattern, pid_str, buf);
319         errno = 0;
320         pid = strtol(pid_str, &endptr, 10);
321         if (errno != 0 || endptr == pid_str || *endptr != '\0') {
322                 if (debug_on)
323                         fprintf(stderr, "wrong/invalid pid in follow buf:\n%s\n", buf);
324                 return -1;
325         }
326
327         return pid;
328
329 }
330
331 static pid_t get_tgid(char *buf)
332 {
333         pid_t tgid;
334         char tgid_str[FIELD_BUFF] = {0};
335         char *endptr;
336
337         search_pattern(&tgid_pattern, tgid_str, buf);
338         errno = 0;
339         tgid = strtol(tgid_str, &endptr, 10);
340         if (errno != 0 || endptr == tgid_str || *endptr != '\0') {
341                 if (debug_on)
342                         fprintf(stderr, "wrong/invalid tgid in follow buf:\n%s\n", buf);
343                 return -1;
344         }
345
346         return tgid;
347
348 }
349
350 static __u64 get_ts_nsec(char *buf)
351 {
352         __u64 ts_nsec;
353         char ts_nsec_str[FIELD_BUFF] = {0};
354         char *endptr;
355
356         search_pattern(&ts_nsec_pattern, ts_nsec_str, buf);
357         errno = 0;
358         ts_nsec = strtoull(ts_nsec_str, &endptr, 10);
359         if (errno != 0 || endptr == ts_nsec_str || *endptr != '\0') {
360                 if (debug_on)
361                         fprintf(stderr, "wrong ts_nsec in follow buf:\n%s\n", buf);
362                 return -1;
363         }
364
365         return ts_nsec;
366 }
367
368 static __u64 get_free_ts_nsec(char *buf)
369 {
370         __u64 free_ts_nsec;
371         char free_ts_nsec_str[FIELD_BUFF] = {0};
372         char *endptr;
373
374         search_pattern(&free_ts_nsec_pattern, free_ts_nsec_str, buf);
375         errno = 0;
376         free_ts_nsec = strtoull(free_ts_nsec_str, &endptr, 10);
377         if (errno != 0 || endptr == free_ts_nsec_str || *endptr != '\0') {
378                 if (debug_on)
379                         fprintf(stderr, "wrong free_ts_nsec in follow buf:\n%s\n", buf);
380                 return -1;
381         }
382
383         return free_ts_nsec;
384 }
385
386 static char *get_comm(char *buf)
387 {
388         char *comm_str = malloc(TASK_COMM_LEN);
389
390         memset(comm_str, 0, TASK_COMM_LEN);
391
392         search_pattern(&comm_pattern, comm_str, buf);
393         errno = 0;
394         if (errno != 0) {
395                 if (debug_on)
396                         fprintf(stderr, "wrong comm in follow buf:\n%s\n", buf);
397                 return NULL;
398         }
399
400         return comm_str;
401 }
402
403 static int get_arg_type(const char *arg)
404 {
405         if (!strcmp(arg, "pid") || !strcmp(arg, "p"))
406                 return ARG_PID;
407         else if (!strcmp(arg, "tgid") || !strcmp(arg, "tg"))
408                 return ARG_TGID;
409         else if (!strcmp(arg, "name") || !strcmp(arg, "n"))
410                 return  ARG_COMM;
411         else if (!strcmp(arg, "stacktrace") || !strcmp(arg, "st"))
412                 return ARG_STACKTRACE;
413         else if (!strcmp(arg, "free") || !strcmp(arg, "f"))
414                 return ARG_FREE;
415         else if (!strcmp(arg, "txt") || !strcmp(arg, "T"))
416                 return ARG_TXT;
417         else if (!strcmp(arg, "free_ts") || !strcmp(arg, "ft"))
418                 return ARG_FREE_TS;
419         else if (!strcmp(arg, "alloc_ts") || !strcmp(arg, "at"))
420                 return ARG_ALLOC_TS;
421         else if (!strcmp(arg, "allocator") || !strcmp(arg, "ator"))
422                 return ARG_ALLOCATOR;
423         else {
424                 return ARG_UNKNOWN;
425         }
426 }
427
428 static int get_allocator(const char *buf, const char *migrate_info)
429 {
430         char *tmp, *first_line, *second_line;
431         int allocator = 0;
432
433         if (strstr(migrate_info, "CMA"))
434                 allocator |= ALLOCATOR_CMA;
435         if (strstr(migrate_info, "slab"))
436                 allocator |= ALLOCATOR_SLAB;
437         tmp = strstr(buf, "__vmalloc_node_range");
438         if (tmp) {
439                 second_line = tmp;
440                 while (*tmp != '\n')
441                         tmp--;
442                 tmp--;
443                 while (*tmp != '\n')
444                         tmp--;
445                 first_line = ++tmp;
446                 tmp = strstr(tmp, "alloc_pages");
447                 if (tmp && first_line <= tmp && tmp < second_line)
448                         allocator |= ALLOCATOR_VMALLOC;
449         }
450         if (allocator == 0)
451                 allocator = ALLOCATOR_OTHERS;
452         return allocator;
453 }
454
455 static bool match_num_list(int num, int *list, int list_size)
456 {
457         for (int i = 0; i < list_size; ++i)
458                 if (list[i] == num)
459                         return true;
460         return false;
461 }
462
463 static bool match_str_list(const char *str, char **list, int list_size)
464 {
465         for (int i = 0; i < list_size; ++i)
466                 if (!strcmp(list[i], str))
467                         return true;
468         return false;
469 }
470
471 static bool is_need(char *buf)
472 {
473         if ((filter & FILTER_UNRELEASE) && get_free_ts_nsec(buf) != 0)
474                 return false;
475         if ((filter & FILTER_PID) && !match_num_list(get_pid(buf), fc.pids, fc.pids_size))
476                 return false;
477         if ((filter & FILTER_TGID) &&
478                 !match_num_list(get_tgid(buf), fc.tgids, fc.tgids_size))
479                 return false;
480
481         char *comm = get_comm(buf);
482
483         if ((filter & FILTER_COMM) &&
484         !match_str_list(comm, fc.comms, fc.comms_size)) {
485                 free(comm);
486                 return false;
487         }
488         free(comm);
489         return true;
490 }
491
492 static void add_list(char *buf, int len, char *ext_buf)
493 {
494         if (list_size != 0 &&
495                 len == list[list_size-1].len &&
496                 memcmp(buf, list[list_size-1].txt, len) == 0) {
497                 list[list_size-1].num++;
498                 list[list_size-1].page_num += get_page_num(buf);
499                 return;
500         }
501         if (list_size == max_size) {
502                 fprintf(stderr, "max_size too small??\n");
503                 exit(1);
504         }
505         if (!is_need(buf))
506                 return;
507         list[list_size].pid = get_pid(buf);
508         list[list_size].tgid = get_tgid(buf);
509         list[list_size].comm = get_comm(buf);
510         list[list_size].txt = malloc(len+1);
511         if (!list[list_size].txt) {
512                 fprintf(stderr, "Out of memory\n");
513                 exit(1);
514         }
515         memcpy(list[list_size].txt, buf, len);
516         list[list_size].txt[len] = 0;
517         list[list_size].len = len;
518         list[list_size].num = 1;
519         list[list_size].page_num = get_page_num(buf);
520
521         list[list_size].stacktrace = strchr(list[list_size].txt, '\n') ?: "";
522         if (*list[list_size].stacktrace == '\n')
523                 list[list_size].stacktrace++;
524         list[list_size].ts_nsec = get_ts_nsec(buf);
525         list[list_size].free_ts_nsec = get_free_ts_nsec(buf);
526         list[list_size].allocator = get_allocator(buf, ext_buf);
527         list_size++;
528         if (list_size % 1000 == 0) {
529                 printf("loaded %d\r", list_size);
530                 fflush(stdout);
531         }
532 }
533
534 static bool parse_cull_args(const char *arg_str)
535 {
536         int size = 0;
537         char **args = explode(',', arg_str, &size);
538
539         for (int i = 0; i < size; ++i) {
540                 int arg_type = get_arg_type(args[i]);
541
542                 if (arg_type == ARG_PID)
543                         cull |= CULL_PID;
544                 else if (arg_type == ARG_TGID)
545                         cull |= CULL_TGID;
546                 else if (arg_type == ARG_COMM)
547                         cull |= CULL_COMM;
548                 else if (arg_type == ARG_STACKTRACE)
549                         cull |= CULL_STACKTRACE;
550                 else if (arg_type == ARG_FREE)
551                         cull |= CULL_UNRELEASE;
552                 else if (arg_type == ARG_ALLOCATOR)
553                         cull |= CULL_ALLOCATOR;
554                 else {
555                         free_explode(args, size);
556                         return false;
557                 }
558         }
559         free_explode(args, size);
560         if (sc.size == 0)
561                 set_single_cmp(compare_num, SORT_DESC);
562         return true;
563 }
564
565 static void set_single_cmp(int (*cmp)(const void *, const void *), int sign)
566 {
567         if (sc.signs == NULL || sc.size < 1)
568                 sc.signs = calloc(1, sizeof(int));
569         sc.signs[0] = sign;
570         if (sc.cmps == NULL || sc.size < 1)
571                 sc.cmps = calloc(1, sizeof(int *));
572         sc.cmps[0] = cmp;
573         sc.size = 1;
574 }
575
576 static bool parse_sort_args(const char *arg_str)
577 {
578         int size = 0;
579
580         if (sc.size != 0) { /* reset sort_condition */
581                 free(sc.signs);
582                 free(sc.cmps);
583                 size = 0;
584         }
585
586         char **args = explode(',', arg_str, &size);
587
588         sc.signs = calloc(size, sizeof(int));
589         sc.cmps = calloc(size, sizeof(int *));
590         for (int i = 0; i < size; ++i) {
591                 int offset = 0;
592
593                 sc.signs[i] = SORT_ASC;
594                 if (args[i][0] == '-' || args[i][0] == '+') {
595                         if (args[i][0] == '-')
596                                 sc.signs[i] = SORT_DESC;
597                         offset = 1;
598                 }
599
600                 int arg_type = get_arg_type(args[i]+offset);
601
602                 if (arg_type == ARG_PID)
603                         sc.cmps[i] = compare_pid;
604                 else if (arg_type == ARG_TGID)
605                         sc.cmps[i] = compare_tgid;
606                 else if (arg_type == ARG_COMM)
607                         sc.cmps[i] = compare_comm;
608                 else if (arg_type == ARG_STACKTRACE)
609                         sc.cmps[i] = compare_stacktrace;
610                 else if (arg_type == ARG_ALLOC_TS)
611                         sc.cmps[i] = compare_ts;
612                 else if (arg_type == ARG_FREE_TS)
613                         sc.cmps[i] = compare_free_ts;
614                 else if (arg_type == ARG_TXT)
615                         sc.cmps[i] = compare_txt;
616                 else if (arg_type == ARG_ALLOCATOR)
617                         sc.cmps[i] = compare_allocator;
618                 else {
619                         free_explode(args, size);
620                         sc.size = 0;
621                         return false;
622                 }
623         }
624         sc.size = size;
625         free_explode(args, size);
626         return true;
627 }
628
629 static int *parse_nums_list(char *arg_str, int *list_size)
630 {
631         int size = 0;
632         char **args = explode(',', arg_str, &size);
633         int *list = calloc(size, sizeof(int));
634
635         errno = 0;
636         for (int i = 0; i < size; ++i) {
637                 char *endptr = NULL;
638
639                 list[i] = strtol(args[i], &endptr, 10);
640                 if (errno != 0 || endptr == args[i] || *endptr != '\0') {
641                         free(list);
642                         return NULL;
643                 }
644         }
645         *list_size = size;
646         free_explode(args, size);
647         return list;
648 }
649
650 static void print_allocator(FILE *out, int allocator)
651 {
652         fprintf(out, "allocated by ");
653         if (allocator & ALLOCATOR_CMA)
654                 fprintf(out, "CMA ");
655         if (allocator & ALLOCATOR_SLAB)
656                 fprintf(out, "SLAB ");
657         if (allocator & ALLOCATOR_VMALLOC)
658                 fprintf(out, "VMALLOC ");
659         if (allocator & ALLOCATOR_OTHERS)
660                 fprintf(out, "OTHERS ");
661 }
662
663 #define BUF_SIZE        (128 * 1024)
664
665 static void usage(void)
666 {
667         printf("Usage: ./page_owner_sort [OPTIONS] <input> <output>\n"
668                 "-m\t\tSort by total memory.\n"
669                 "-s\t\tSort by the stack trace.\n"
670                 "-t\t\tSort by times (default).\n"
671                 "-p\t\tSort by pid.\n"
672                 "-P\t\tSort by tgid.\n"
673                 "-n\t\tSort by task command name.\n"
674                 "-a\t\tSort by memory allocate time.\n"
675                 "-r\t\tSort by memory release time.\n"
676                 "-f\t\tFilter out the information of blocks whose memory has been released.\n"
677                 "-d\t\tPrint debug information.\n"
678                 "--pid <pidlist>\tSelect by pid. This selects the information of blocks whose process ID numbers appear in <pidlist>.\n"
679                 "--tgid <tgidlist>\tSelect by tgid. This selects the information of blocks whose Thread Group ID numbers appear in <tgidlist>.\n"
680                 "--name <cmdlist>\n\t\tSelect by command name. This selects the information of blocks whose command name appears in <cmdlist>.\n"
681                 "--cull <rules>\tCull by user-defined rules.<rules> is a single argument in the form of a comma-separated list with some common fields predefined\n"
682                 "--sort <order>\tSpecify sort order as: [+|-]key[,[+|-]key[,...]]\n"
683         );
684 }
685
686 int main(int argc, char **argv)
687 {
688         FILE *fin, *fout;
689         char *buf, *ext_buf;
690         int i, count;
691         struct stat st;
692         int opt;
693         struct option longopts[] = {
694                 { "pid", required_argument, NULL, 1 },
695                 { "tgid", required_argument, NULL, 2 },
696                 { "name", required_argument, NULL, 3 },
697                 { "cull",  required_argument, NULL, 4 },
698                 { "sort",  required_argument, NULL, 5 },
699                 { 0, 0, 0, 0},
700         };
701
702         while ((opt = getopt_long(argc, argv, "adfmnprstP", longopts, NULL)) != -1)
703                 switch (opt) {
704                 case 'a':
705                         set_single_cmp(compare_ts, SORT_ASC);
706                         break;
707                 case 'd':
708                         debug_on = true;
709                         break;
710                 case 'f':
711                         filter = filter | FILTER_UNRELEASE;
712                         break;
713                 case 'm':
714                         set_single_cmp(compare_page_num, SORT_DESC);
715                         break;
716                 case 'p':
717                         set_single_cmp(compare_pid, SORT_ASC);
718                         break;
719                 case 'r':
720                         set_single_cmp(compare_free_ts, SORT_ASC);
721                         break;
722                 case 's':
723                         set_single_cmp(compare_stacktrace, SORT_ASC);
724                         break;
725                 case 't':
726                         set_single_cmp(compare_num, SORT_DESC);
727                         break;
728                 case 'P':
729                         set_single_cmp(compare_tgid, SORT_ASC);
730                         break;
731                 case 'n':
732                         set_single_cmp(compare_comm, SORT_ASC);
733                         break;
734                 case 1:
735                         filter = filter | FILTER_PID;
736                         fc.pids = parse_nums_list(optarg, &fc.pids_size);
737                         if (fc.pids == NULL) {
738                                 fprintf(stderr, "wrong/invalid pid in from the command line:%s\n",
739                                                 optarg);
740                                 exit(1);
741                         }
742                         break;
743                 case 2:
744                         filter = filter | FILTER_TGID;
745                         fc.tgids = parse_nums_list(optarg, &fc.tgids_size);
746                         if (fc.tgids == NULL) {
747                                 fprintf(stderr, "wrong/invalid tgid in from the command line:%s\n",
748                                                 optarg);
749                                 exit(1);
750                         }
751                         break;
752                 case 3:
753                         filter = filter | FILTER_COMM;
754                         fc.comms = explode(',', optarg, &fc.comms_size);
755                         break;
756                 case 4:
757                         if (!parse_cull_args(optarg)) {
758                                 fprintf(stderr, "wrong argument after --cull option:%s\n",
759                                                 optarg);
760                                 exit(1);
761                         }
762                         break;
763                 case 5:
764                         if (!parse_sort_args(optarg)) {
765                                 fprintf(stderr, "wrong argument after --sort option:%s\n",
766                                                 optarg);
767                                 exit(1);
768                         }
769                         break;
770                 default:
771                         usage();
772                         exit(1);
773                 }
774
775         if (optind >= (argc - 1)) {
776                 usage();
777                 exit(1);
778         }
779
780         fin = fopen(argv[optind], "r");
781         fout = fopen(argv[optind + 1], "w");
782         if (!fin || !fout) {
783                 usage();
784                 perror("open: ");
785                 exit(1);
786         }
787
788         check_regcomp(&order_pattern, "order\\s*([0-9]*),");
789         check_regcomp(&pid_pattern, "pid\\s*([0-9]*),");
790         check_regcomp(&tgid_pattern, "tgid\\s*([0-9]*) ");
791         check_regcomp(&comm_pattern, "tgid\\s*[0-9]*\\s*\\((.*)\\),\\s*ts");
792         check_regcomp(&ts_nsec_pattern, "ts\\s*([0-9]*)\\s*ns,");
793         check_regcomp(&free_ts_nsec_pattern, "free_ts\\s*([0-9]*)\\s*ns");
794         fstat(fileno(fin), &st);
795         max_size = st.st_size / 100; /* hack ... */
796
797         list = malloc(max_size * sizeof(*list));
798         buf = malloc(BUF_SIZE);
799         ext_buf = malloc(BUF_SIZE);
800         if (!list || !buf || !ext_buf) {
801                 fprintf(stderr, "Out of memory\n");
802                 exit(1);
803         }
804
805         for ( ; ; ) {
806                 int buf_len = read_block(buf, ext_buf, BUF_SIZE, fin);
807
808                 if (buf_len < 0)
809                         break;
810                 add_list(buf, buf_len, ext_buf);
811         }
812
813         printf("loaded %d\n", list_size);
814
815         printf("sorting ....\n");
816
817         qsort(list, list_size, sizeof(list[0]), compare_cull_condition);
818
819         printf("culling\n");
820
821         for (i = count = 0; i < list_size; i++) {
822                 if (count == 0 ||
823                     compare_cull_condition((void *)(&list[count-1]), (void *)(&list[i])) != 0) {
824                         list[count++] = list[i];
825                 } else {
826                         list[count-1].num += list[i].num;
827                         list[count-1].page_num += list[i].page_num;
828                 }
829         }
830
831         qsort(list, count, sizeof(list[0]), compare_sort_condition);
832
833         for (i = 0; i < count; i++) {
834                 if (cull == 0) {
835                         fprintf(fout, "%d times, %d pages, ", list[i].num, list[i].page_num);
836                         print_allocator(fout, list[i].allocator);
837                         fprintf(fout, ":\n%s\n", list[i].txt);
838                 }
839                 else {
840                         fprintf(fout, "%d times, %d pages",
841                                         list[i].num, list[i].page_num);
842                         if (cull & CULL_PID || filter & FILTER_PID)
843                                 fprintf(fout, ", PID %d", list[i].pid);
844                         if (cull & CULL_TGID || filter & FILTER_TGID)
845                                 fprintf(fout, ", TGID %d", list[i].pid);
846                         if (cull & CULL_COMM || filter & FILTER_COMM)
847                                 fprintf(fout, ", task_comm_name: %s", list[i].comm);
848                         if (cull & CULL_ALLOCATOR) {
849                                 fprintf(fout, ", ");
850                                 print_allocator(fout, list[i].allocator);
851                         }
852                         if (cull & CULL_UNRELEASE)
853                                 fprintf(fout, " (%s)",
854                                                 list[i].free_ts_nsec ? "UNRELEASED" : "RELEASED");
855                         if (cull & CULL_STACKTRACE)
856                                 fprintf(fout, ":\n%s", list[i].stacktrace);
857                         fprintf(fout, "\n");
858                 }
859         }
860         regfree(&order_pattern);
861         regfree(&pid_pattern);
862         regfree(&tgid_pattern);
863         regfree(&comm_pattern);
864         regfree(&ts_nsec_pattern);
865         regfree(&free_ts_nsec_pattern);
866         return 0;
867 }