// SPDX-License-Identifier: GPL-2.0
/*
* User-space helper to sort the output of /sys/kernel/debug/page_owner
*
* Example use:
* cat /sys/kernel/debug/page_owner > page_owner_full.txt
* ./page_owner_sort page_owner_full.txt sorted_page_owner.txt
* Or sort by total memory:
* ./page_owner_sort -m page_owner_full.txt sorted_page_owner.txt
*
* See Documentation/mm/page_owner.rst
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <regex.h>
#include <errno.h>
#include <linux/types.h>
#include <getopt.h>
#define bool int
#define true 1
#define false 0
#define TASK_COMM_LEN 16
struct block_list {
char *txt;
char *comm; // task command name
char *stacktrace;
__u64 ts_nsec;
int len;
int num;
int page_num;
pid_t pid;
pid_t tgid;
int allocator;
};
enum FILTER_BIT {
FILTER_PID = 1<<1,
FILTER_TGID = 1<<2,
FILTER_COMM = 1<<3
};
enum CULL_BIT {
CULL_PID = 1<<1,
CULL_TGID = 1<<2,
CULL_COMM = 1<<3,
CULL_STACKTRACE = 1<<4,
CULL_ALLOCATOR = 1<<5
};
enum ALLOCATOR_BIT {
ALLOCATOR_CMA = 1<<1,
ALLOCATOR_SLAB = 1<<2,
ALLOCATOR_VMALLOC = 1<<3,
ALLOCATOR_OTHERS = 1<<4
};
enum ARG_TYPE {
ARG_TXT, ARG_COMM, ARG_STACKTRACE, ARG_ALLOC_TS, ARG_CULL_TIME,
ARG_PAGE_NUM, ARG_PID, ARG_TGID, ARG_UNKNOWN, ARG_ALLOCATOR
};
enum SORT_ORDER {
SORT_ASC = 1,
SORT_DESC = -1,
};
enum COMP_FLAG {
COMP_NO_FLAG = 0,
COMP_ALLOC = 1<<0,
COMP_PAGE_NUM = 1<<1,
COMP_PID = 1<<2,
COMP_STACK = 1<<3,
COMP_NUM = 1<<4,
COMP_TGID = 1<<5,
COMP_COMM = 1<<6
};
struct filter_condition {
pid_t *pids;
pid_t *tgids;
char **comms;
int pids_size;
int tgids_size;
int comms_size;
};
struct sort_condition {
int (**cmps)(const void *, const void *);
int *signs;
int size;
};
static struct filter_condition fc;
static struct sort_condition sc;
static regex_t order_pattern;
static regex_t pid_pattern;
static regex_t tgid_pattern;
static regex_t comm_pattern;
static regex_t ts_nsec_pattern;
static struct block_list *list;
static int list_size;
static int max_size;
static int cull;
static int filter;
static bool debug_on;
static void set_single_cmp(int (*cmp)(const void *, const void *), int sign);
int read_block(char *buf, char *ext_buf, int buf_size, FILE *fin)
{
char *curr = buf, *const buf_end = buf + buf_size;
while (buf_end - curr > 1 && fgets(curr, buf_end - curr, fin)) {
if (*curr == '\n') { /* empty line */
return curr - buf;
}
if (!strncmp(curr, "PFN", 3)) {
strcpy(ext_buf, curr);
continue;
}
curr += strlen(curr);
}
return -1; /* EOF or no space left in buf. */
}
static int compare_txt(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return strcmp(l1->txt, l2->txt);
}
static int compare_stacktrace(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return strcmp(l1->stacktrace, l2->stacktrace);
}
static int compare_num(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l1->num - l2->num;
}
static int compare_page_num(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l1->page_num - l2->page_num;
}
static int compare_pid(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l1->pid - l2->pid;
}
static int compare_tgid(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l1->tgid - l2->tgid;
}
static int compare_allocator(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l1->allocator - l2->allocator;
}
static int compare_comm(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return strcmp(l1->comm, l2->comm);
}
static int compare_ts(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l1->ts_nsec < l2->ts_nsec ? -1 : 1;
}
static int compare_cull_condition(const void *p1, const void *p2)
{
if (cull == 0)
return compare_txt(p1, p2);
if ((cull & CULL_STACKTRACE) && compare_stacktrace(p1, p2))
return compare_stacktrace(p1, p2);
if ((cull & CULL_PID) && compare_pid(p1, p2))
return compare_pid(p1, p2);
if ((cull & CULL_TGID) && compare_tgid(p1, p2))
return compare_tgid(p1, p2);
if ((cull & CULL_COMM) && compare_comm(p1, p2))
return compare_comm(p1, p2);
if ((cull & CULL_ALLOCATOR) && compare_allocator(p1, p2))
return compare_allocator(p1, p2);
return 0;
}
static int compare_sort_condition(const void *p1, const void *p2)
{
int cmp = 0;
for (int i = 0; i < sc.size; ++i)
if (cmp == 0)
cmp = sc.signs[i] * sc.cmps[i](p1, p2);
return cmp;
}
static int remove_pattern(regex_t *pattern, char *buf, int len)
{
regmatch_t pmatch[2];
int err;
err = regexec(pattern, buf, 2, pmatch, REG_NOTBOL);
if (err != 0 || pmatch[1].rm_so == -1)
return len;
memcpy(buf + pmatch[1].rm_so,
buf + pmatch[1].rm_eo, len - pmatch[1].rm_eo);
return len - (pmatch[1].rm_eo - pmatch[1].rm_so);
}
static int search_pattern(regex_t *pattern, char *pattern_str, char *buf)
{
int err, val_len;
regmatch_t pmatch[2];
err = regexec(pattern, buf, 2, pmatch, REG_NOTBOL);
if (err != 0 || pmatch[1].rm_so == -1) {
if (debug_on)
fprintf(stderr, "no matching pattern in %s\n", buf);
return -1;
}
val_len = pmatch[1].rm_eo - pmatch[1].rm_so;
memcpy(pattern_str, buf + pmatch[1].rm_so, val_len);
return 0;
}
static bool check_regcomp(regex_t *pattern, const char *regex)
{
int err;
err = regcomp(pattern, regex, REG_EXTENDED | REG_NEWLINE);
if (err != 0 || pattern->re_nsub != 1) {
fprintf(stderr, "Invalid pattern %s code %d\n", regex, err);
return false;
}
return true;
}
static char **explode(char sep, const char *str, int *size)
{
int count = 0, len = strlen(str);
int lastindex = -1, j = 0;
for (int i = 0; i < len; i++)
if (str[i] == sep)
count++;
char **ret = calloc(++count, sizeof(char *));
for (int i = 0; i < len; i++) {
if (str[i] == sep) {
ret[j] = calloc(i - lastindex, sizeof(char));
memcpy(ret[j++], str + lastindex + 1, i - lastindex - 1);
lastindex = i;
}
}
if (lastindex <= len - 1) {
ret[j] = calloc(len - lastindex, sizeof(char));
memcpy(ret[j++], str + lastindex + 1, strlen(str) - 1 - lastindex);
}
*size = j;
return ret;
}
static void free_explode(char **arr, int size)
{
for (int i = 0; i < size; i++)
free(arr[i]);
free(arr);
}
# define FIELD_BUFF 25
static int get_page_num(char *buf)
{
int order_val;
char order_str[FIELD_BUFF] = {0};
char *endptr;
search_pattern(&order_pattern, order_str, buf);
errno = 0;
order_val = strtol(order_str, &endptr, 10);
if (order_val > 64 || errno != 0 || endptr == order_str || *endptr != '\0') {
if (debug_on)
fprintf(stderr, "wrong order in follow buf:\n%s\n", buf);
return 0;
}
return 1 << order_val;
}
static pid_t get_pid(char *buf)
{
pid_t pid;
char pid_str[FIELD_BUFF] = {0};
char *endptr;
search_pattern(&pid_pattern, pid_str, buf);
errno = 0;
pid = strtol(pid_str, &endptr, 10);
if (errno != 0 || endptr == pid_str || *endptr != '\0') {
if (debug_on)
fprintf(stderr, "wrong/invalid pid in follow buf:\n%s\n", buf);
return -1;
}
return pid;
}
static pid_t get_tgid(char *buf)
{
pid_t tgid;
char tgid_str[FIELD_BUFF] = {0};
char *endptr;
search_pattern(&tgid_pattern, tgid_str, buf);
errno = 0;
tgid = strtol(tgid_str, &endptr, 10);
if (errno != 0 || endptr == tgid_str || *endptr != '\0') {
if (debug_on)
fprintf(stderr, "wrong/invalid tgid in follow buf:\n%s\n", buf);
return -1;
}
return tgid;
}
static __u64 get_ts_nsec(char *buf)
{
__u64 ts_nsec;
char ts_nsec_str[FIELD_BUFF] = {0};
char *endptr;
search_pattern(&ts_nsec_pattern, ts_nsec_str, buf);
errno = 0;
ts_nsec = strtoull(ts_nsec_str, &endptr, 10);
if (errno != 0 || endptr == ts_nsec_str || *endptr != '\0') {
if (debug_on)
fprintf(stderr, "wrong ts_nsec in follow buf:\n%s\n", buf);
return -1;
}
return ts_nsec;
}
static char *get_comm(char *buf)
{
char *comm_str = malloc(TASK_COMM_LEN);
memset(comm_str, 0, TASK_COMM_LEN);
search_pattern(&comm_pattern, comm_str, buf);
errno = 0;
if (errno != 0) {
if (debug_on)
fprintf(stderr, "wrong comm in follow buf:\n%s\n", buf);
return NULL;
}
return comm_str;
}
static int get_arg_type(const char *arg)
{
if (!strcmp(arg, "pid") || !strcmp(arg, "p"))
return ARG_PID;
else if (!strcmp(arg, "tgid") || !strcmp(arg, "tg"))
return ARG_TGID;
else if (!strcmp(arg, "name") || !strcmp(arg, "n"))
return ARG_COMM;
else if (!strcmp(arg, "stacktrace") || !strcmp(arg, "st"))
return ARG_STACKTRACE;
else if (!strcmp(arg, "txt") || !strcmp(arg, "T"))
return ARG_TXT;
else if (!strcmp(arg, "alloc_ts") || !strcmp(arg, "at"))
return ARG_ALLOC_TS;
else if (!strcmp(arg, "allocator") || !strcmp(arg, "ator"))
return ARG_ALLOCATOR;
else {
return ARG_UNKNOWN;
}
}
static int get_allocator(const char *buf, const char *migrate_info)
{
char *tmp, *first_line, *second_line;
int allocator = 0;
if (strstr(migrate_info, "CMA"))
allocator |= ALLOCATOR_CMA;
if (strstr(migrate_info, "slab"))
allocator |= ALLOCATOR_SLAB;
tmp = strstr(buf, "__vmalloc_node_range");
if (tmp) {
second_line = tmp;
while (*tmp != '\n')
tmp--;
tmp--;
while (*tmp != '\n')
tmp--;
first_line = ++tmp;
tmp = strstr(tmp, "alloc_pages");
if (tmp && first_line <= tmp && tmp < second_line)
allocator |= ALLOCATOR_VMALLOC;
}
if (allocator == 0)
allocator = ALLOCATOR_OTHERS;
return allocator;
}
static bool match_num_list(int num, int *list, int list_size)
{
for (int i = 0; i < list_size; ++i)
if (list[i] == num)
return true;
return false;
}
static bool match_str_list(const char *str, char **list, int list_size)
{
for (int i = 0; i < list_size; ++i)
if (!strcmp(list[i], str))
return true;
return false;
}
static bool is_need(char *buf)
{
if ((filter & FILTER_PID) && !match_num_list(get_pid(buf), fc.pids, fc.pids_size))
return false;
if ((filter & FILTER_TGID) &&
!match_num_list(get_tgid(buf), fc.tgids, fc.tgids_size))
return false;
char *comm = get_comm(buf);
if ((filter & FILTER_COMM) &&
!match_str_list(comm, fc.comms, fc.comms_size)) {
free(comm);
return false;
}
free(comm);
return true;
}
static bool add_list(char *buf, int len, char *ext_buf)
{
if (list_size == max_size) {
fprintf(stderr, "max_size too small??\n");
return false;
}
if (!is_need(buf))
return true;
list[list_size].pid = get_pid(buf);
list[list_size].tgid = get_tgid(buf);
list[list_size].comm = get_comm(buf);
list[list_size].txt = malloc(len+1);
if (!list[list_size].txt) {
fprintf(stderr, "Out of memory\n");
return false;
}
memcpy(list[list_size].txt, buf, len);
if (sc.cmps[0] != compare_ts) {
len = remove_pattern(&ts_nsec_pattern, list[list_size].txt, len);
}
list[list_size].txt[len] = 0;
list[list_size].len = len;
list[list_size].num = 1;
list[list_size].page_num = get_page_num(buf);
list[list_size].stacktrace = strchr(list[list_size].txt, '\n') ?: "";
if (*list[list_size].stacktrace == '\n')
list[list_size].stacktrace++;
list[list_size].ts_nsec = get_ts_nsec(buf);
list[list_size].allocator = get_allocator(buf, ext_buf);
list_size++;
if (list_size % 1000 == 0) {
printf("loaded %d\r", list_size);
fflush(stdout);
}
return true;
}
static bool parse_cull_args(const char *arg_str)
{
int size = 0;
char **args = explode(',', arg_str, &size);
for (int i = 0; i < size; ++i) {
int arg_type = get_arg_type(args[i]);
if (arg_type == ARG_PID)
cull |= CULL_PID;
else if (arg_type == ARG_TGID)
cull |= CULL_TGID;
else if (arg_type == ARG_COMM)
cull |= CULL_COMM;
else if (arg_type == ARG_STACKTRACE)
cull |= CULL_STACKTRACE;
else if (arg_type == ARG_ALLOCATOR)
cull |= CULL_ALLOCATOR;
else {
free_explode(args, size);
return false;
}
}
free_explode(args, size);
if (sc.size == 0)
set_single_cmp(compare_num, SORT_DESC);
return true;
}
static void set_single_cmp(int (*cmp)(const void *, const void *), int sign)
{
if (sc.signs == NULL || sc.size < 1)
sc.signs = calloc(1, sizeof(int));
sc.signs[0] = sign;
if (sc.cmps == NULL || sc.size < 1)
sc.cmps = calloc(1, sizeof(int *));
sc.cmps[0] = cmp;
sc.size = 1;
}
static bool parse_sort_args(const char *arg_str)
{
int size = 0;
if (sc.size != 0) { /* reset sort_condition */
free(sc.signs);
free(sc.cmps);
size = 0;
}
char **args = explode(',', arg_str, &size);
sc.signs = calloc(size, sizeof(int));
sc.cmps = calloc(size, sizeof(int *));
for (int i = 0; i < size; ++i) {
int offset = 0;
sc.signs[i] = SORT_ASC;
if (args[i][0] == '-' || args[i][0] == '+') {
if (args[i][0] == '-')
sc.signs[i] = SORT_DESC;
offset = 1;
}
int arg_type = get_arg_type(args[i]+offset);
if (arg_type == ARG_PID)
sc.cmps[i] = compare_pid;
else if (arg_type == ARG_TGID)
sc.cmps[i] = compare_tgid;
else if (arg_type == ARG_COMM)
sc.cmps[i] = compare_comm;
else if (arg_type == ARG_STACKTRACE)
sc.cmps[i] = compare_stacktrace;
else if (arg_type == ARG_ALLOC_TS)
sc.cmps[i] = compare_ts;
else if (arg_type == ARG_TXT)
sc.cmps[i] = compare_txt;
else if (arg_type == ARG_ALLOCATOR)
sc.cmps[i] = compare_allocator;
else {
free_explode(args, size);
sc.size = 0;
return false;
}
}
sc.size = size;
free_explode(args, size);
return true;
}
static int *parse_nums_list(char *arg_str, int *list_size)
{
int size = 0;
char **args = explode(',', arg_str, &size);
int *list = calloc(size, sizeof(int));
errno = 0;
for (int i = 0; i < size; ++i) {
char *endptr = NULL;
list[i] = strtol(args[i], &endptr, 10);
if (errno != 0 || endptr == args[i] || *endptr != '\0') {
free(list);
return NULL;
}
}
*list_size = size;
free_explode(args, size);
return list;
}
static void print_allocator(FILE *out, int allocator)
{
fprintf(out, "allocated by ");
if (allocator & ALLOCATOR_CMA)
fprintf(out, "CMA ");
if (allocator & ALLOCATOR_SLAB)
fprintf(out, "SLAB ");
if (allocator & ALLOCATOR_VMALLOC)
fprintf(out, "VMALLOC ");
if (allocator & ALLOCATOR_OTHERS)
fprintf(out, "OTHERS ");
}
#define BUF_SIZE (128 * 1024)
static void usage(void)
{
printf("Usage: ./page_owner_sort [OPTIONS] <input> <output>\n"
"-a\t\t\tSort by memory allocation time.\n"
"-m\t\t\tSort by total memory.\n"
"-n\t\t\tSort by task command name.\n"
"-p\t\t\tSort by pid.\n"
"-P\t\t\tSort by tgid.\n"
"-s\t\t\tSort by the stacktrace.\n"
"-t\t\t\tSort by number of times record is seen (default).\n\n"
"--pid <pidlist>\t\tSelect by pid. This selects the information"
" of\n\t\t\tblocks whose process ID numbers appear in <pidlist>.\n"
"--tgid <tgidlist>\tSelect by tgid. This selects the information"
" of\n\t\t\tblocks whose Thread Group ID numbers appear in "
"<tgidlist>.\n"
"--name <cmdlist>\tSelect by command name. This selects the"
" information\n\t\t\tof blocks whose command name appears in"
" <cmdlist>.\n"
"--cull <rules>\t\tCull by user-defined rules. <rules> is a "
"single\n\t\t\targument in the form of a comma-separated list "
"with some\n\t\t\tcommon fields predefined (pid, tgid, comm, "
"stacktrace, allocator)\n"
"--sort <order>\t\tSpecify sort order as: [+|-]key[,[+|-]key[,...]]\n"
);
}
int main(int argc, char **argv)
{
FILE *fin, *fout;
char *buf, *ext_buf;
int i, count, compare_flag;
struct stat st;
int opt;
struct option longopts[] = {
{ "pid", required_argument, NULL, 1 },
{ "tgid", required_argument, NULL, 2 },
{ "name", required_argument, NULL, 3 },
{ "cull", required_argument, NULL, 4 },
{ "sort", required_argument, NULL, 5 },
{ 0, 0, 0, 0},
};
compare_flag = COMP_NO_FLAG;
while ((opt = getopt_long(argc, argv, "admnpstP", longopts, NULL)) != -1)
switch (opt) {
case 'a':
compare_flag |= COMP_ALLOC;
break;
case 'd':
debug_on = true;
break;
case 'm':
compare_flag |= COMP_PAGE_NUM;
break;
case 'p':
compare_flag |= COMP_PID;
break;
case 's':
compare_flag |= COMP_STACK;
break;
case 't':
compare_flag |= COMP_NUM;
break;
case 'P':
compare_flag |= COMP_TGID;
break;
case 'n':
compare_flag |= COMP_COMM;
break;
case 1:
filter = filter | FILTER_PID;
fc.pids = parse_nums_list(optarg, &fc.pids_size);
if (fc.pids == NULL) {
fprintf(stderr, "wrong/invalid pid in from the command line:%s\n",
optarg);
exit(1);
}
break;
case 2:
filter = filter | FILTER_TGID;
fc.tgids = parse_nums_list(optarg, &fc.tgids_size);
if (fc.tgids == NULL) {
fprintf(stderr, "wrong/invalid tgid in from the command line:%s\n",
optarg);
exit(1);
}
break;
case 3:
filter = filter | FILTER_COMM;
fc.comms = explode(',', optarg, &fc.comms_size);
break;
case 4:
if (!parse_cull_args(optarg)) {
fprintf(stderr, "wrong argument after --cull option:%s\n",
optarg);
exit(1);
}
break;
case 5:
if (!parse_sort_args(optarg)) {
fprintf(stderr, "wrong argument after --sort option:%s\n",
optarg);
exit(1);
}
break;
default:
usage();
exit(1);
}
if (optind >= (argc - 1)) {
usage();
exit(1);
}
/* Only one compare option is allowed, yet we also want handle the
* default case were no option is provided, but we still want to
* match the behavior of the -t option (compare by number of times
* a record is seen
*/
switch (compare_flag) {
case COMP_ALLOC:
set_single_cmp(compare_ts, SORT_ASC);
break;
case COMP_PAGE_NUM:
set_single_cmp(compare_page_num, SORT_DESC);
break;
case COMP_PID:
set_single_cmp(compare_pid, SORT_ASC);
break;
case COMP_STACK:
set_single_cmp(compare_stacktrace, SORT_ASC);
break;
case COMP_NO_FLAG:
case COMP_NUM:
set_single_cmp(compare_num, SORT_DESC);
break;
case COMP_TGID:
set_single_cmp(compare_tgid, SORT_ASC);
break;
case COMP_COMM:
set_single_cmp(compare_comm, SORT_ASC);
break;
default:
usage();
exit(1);
}
fin = fopen(argv[optind], "r");
fout = fopen(argv[optind + 1], "w");
if (!fin || !fout) {
usage();
perror("open: ");
exit(1);
}
if (!check_regcomp(&order_pattern, "order\\s*([0-9]*),"))
goto out_order;
if (!check_regcomp(&pid_pattern, "pid\\s*([0-9]*),"))
goto out_pid;
if (!check_regcomp(&tgid_pattern, "tgid\\s*([0-9]*) "))
goto out_tgid;
if (!check_regcomp(&comm_pattern, "tgid\\s*[0-9]*\\s*\\((.*)\\),\\s*ts"))
goto out_comm;
if (!check_regcomp(&ts_nsec_pattern, "ts\\s*([0-9]*)\\s*ns"))
goto out_ts;
fstat(fileno(fin), &st);
max_size = st.st_size / 100; /* hack ... */
list = malloc(max_size * sizeof(*list));
buf = malloc(BUF_SIZE);
ext_buf = malloc(BUF_SIZE);
if (!list || !buf || !ext_buf) {
fprintf(stderr, "Out of memory\n");
goto out_free;
}
for ( ; ; ) {
int buf_len = read_block(buf, ext_buf, BUF_SIZE, fin);
if (buf_len < 0)
break;
if (!add_list(buf, buf_len, ext_buf))
goto out_free;
}
printf("loaded %d\n", list_size);
printf("sorting ....\n");
qsort(list, list_size, sizeof(list[0]), compare_cull_condition);
printf("culling\n");
for (i = count = 0; i < list_size; i++) {
if (count == 0 ||
compare_cull_condition((void *)(&list[count-1]), (void *)(&list[i])) != 0) {
list[count++] = list[i];
} else {
list[count-1].num += list[i].num;
list[count-1].page_num += list[i].page_num;
}
}
qsort(list, count, sizeof(list[0]), compare_sort_condition);
for (i = 0; i < count; i++) {
if (cull == 0) {
fprintf(fout, "%d times, %d pages, ", list[i].num, list[i].page_num);
print_allocator(fout, list[i].allocator);
fprintf(fout, ":\n%s\n", list[i].txt);
}
else {
fprintf(fout, "%d times, %d pages",
list[i].num, list[i].page_num);
if (cull & CULL_PID || filter & FILTER_PID)
fprintf(fout, ", PID %d", list[i].pid);
if (cull & CULL_TGID || filter & FILTER_TGID)
fprintf(fout, ", TGID %d", list[i].tgid);
if (cull & CULL_COMM || filter & FILTER_COMM)
fprintf(fout, ", task_comm_name: %s", list[i].comm);
if (cull & CULL_ALLOCATOR) {
fprintf(fout, ", ");
print_allocator(fout, list[i].allocator);
}
if (cull & CULL_STACKTRACE)
fprintf(fout, ":\n%s", list[i].stacktrace);
fprintf(fout, "\n");
}
}
out_free:
if (ext_buf)
free(ext_buf);
if (buf)
free(buf);
if (list)
free(list);
out_ts:
regfree(&ts_nsec_pattern);
out_comm:
regfree(&comm_pattern);
out_tgid:
regfree(&tgid_pattern);
out_pid:
regfree(&pid_pattern);
out_order:
regfree(&order_pattern);
return 0;
}
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