+/*
+ * Copyright (C) 2010 Timo Kokkonen <timo.t.kokkonen@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
#include <sys/types.h>
-#include <dirent.h>
+#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <libgen.h>
+#include <fcntl.h>
+#include <unistd.h>
#include "parse.h"
#include "pagemap.h"
+#include "pidlib.h"
static struct maps_list *alloc_maplist(void)
{
struct maps_list *map;
- map = malloc(sizeof *map);
+ map = calloc(sizeof *map, 1);
if (map == NULL)
goto err;
- memset(map, 0, sizeof(*map));
INIT_LIST_HEAD(&map->list);
err:
return map;
{
struct maps *map;
- map = malloc(sizeof *map);
+ map = calloc(sizeof(*map), 1);
if (map == NULL)
goto err;
- memset(map, 0, sizeof(*map));
INIT_LIST_HEAD(&map->list);
err:
return map;
while (fgets(line, sizeof(line), file)) {
struct maps *map = alloc_map();
unsigned long start, end;
- char name[1024];
+ int skip;
if (map == NULL)
return 0;
if (the_map == NULL)
the_map = map;
- ret = sscanf(line, "%lx-%lx %*s %*s %*s %*s %s",
- &start, &end, name);
+ ret = sscanf(line, "%lx-%lx %*s %*s %*s %*s %n",
+ &start, &end, &skip);
if (ret < 2) {
printf("Error reading input: %s\n", line);
map->pid = pid;
map->tid = tid;
- if (ret >= 3)
- strncpy(map->name, name, sizeof(map->name));
+ strncpy(map->name, line + skip, sizeof(map->name) - 1);
+
+ /* zero out the newline */
+ map->name[MAX(strlen(map->name) - 1, 0)] = '\0';
list_add_tail(&map->list, &the_map->list);
}
return the_map;
}
-static void clear_pageframe(struct pageframe *pf)
-{
- memset(pf, 0, sizeof(*pf));
-}
-
static struct pageframe *alloc_pageframe(void)
{
struct pageframe *pageframe;
return pageframe;
}
-#define BITRANGE(first, last) (((2ll << (last - first)) - 1) << first)
-
-static void pageframe_to_struct(unsigned long long p, struct pageframe *pf)
+static int pid_is_match(int pidn, struct list_head *pidlist)
{
- /* Refer Documentation/vm/pagemap.txt for the format */
- pf->page_present = !!(BITRANGE(63, 63) & p);
- pf->page_swapped = !!(BITRANGE(62, 62) & p);
- pf->page_shift = (BITRANGE(55, 60) & p) >> 55;
- pf->pfn = (BITRANGE(0, 54) & p);
- pf->swap_type = (BITRANGE(0, 4) & p);
- pf->swap_offset = (BITRANGE(5, 54) & p) >> 5;
-#if 0
- printf("pfn: %lx shift: %d present: %d swapped %d\n",
- pf->pfn, pf->page_shift, pf->page_present, pf->page_swapped);
-#endif
-}
+ struct pidlist *pid;
-static int compare_pageframe(struct bintree *at, struct bintree *bt)
-{
- struct pageframe *a, *b;
- a = tree_to_pageframe(at);
- b = tree_to_pageframe(bt);
+ list_for_each_entry(pid, pidlist, list) {
+ if (pid->pid == pidn)
+ return 1;
+ }
- return a->pfn - b->pfn;
+ return 0;
}
-struct bintree_ops pageframe_ops = {
- .compare = compare_pageframe,
-};
-
-static int read_cmdline(int pid, int tid, char *cmdline, size_t len)
+static int should_scan_process(struct parse_opts *opts, struct process *process)
{
- FILE *file;
- char path[512];
- int ret;
-
- snprintf(path, sizeof(path), "/proc/%d/task/%d/cmdline", pid, tid);
- file = fopen(path, "rb");
+ int match = 0;
+
+ if (is_parse_option(opts, PARSE_PID) &&
+ is_parse_option(opts, PARSE_MAP_NAME)) {
+ if (pid_is_match(process->pid, &opts->pidlist))
+ match = 1;
+ } else {
+ if (is_parse_option(opts, PARSE_PID)) {
+ if (pid_is_match(process->pid, &opts->pidlist))
+ match = 1;
+ }
- if (!file)
- return -1;
+ if (is_parse_option(opts, PARSE_MAP_NAME))
+ match = 1;
+ }
- ret = fread(cmdline, 1, len, file);
- if (ret > 0)
- cmdline[ret - 1] = 0;
- fclose(file);
+ if (is_parse_option(opts, PARSE_NOADD_TREE))
+ match = !match;
- return ret > 0 ? 0 : -1;
+ return match;
}
-static char *get_name_by_pid(int pid)
+static int should_scan_mapping(struct parse_opts *opts, struct maps *map)
{
- static int last_pid;
- static char cmdline[128];
- static char *bname;
+ int match = 0;
- if (last_pid == pid)
- return bname;
-
- if (read_cmdline(pid, pid, cmdline, sizeof(cmdline))) {
- bname = NULL;
- return NULL;
- }
+ if (is_parse_option(opts, PARSE_MAP_NAME)) {
+ if (strstr(map->name, opts->name))
+ match = 1;
- bname = basename(cmdline);
+ if (is_parse_option(opts, PARSE_NOADD_TREE))
+ match = !match;
+ } else
+ match = 1;
- last_pid = pid;
- return bname;
+ return match;
}
-static int check_parse_opts(struct parse_opts *opts, struct pageframe *pf,
+static int should_add_to_tree(struct parse_opts *opts, struct pageframe *pf,
struct maps *map)
{
- if (opts->parse_mask & PARSE_PID) {
- if (opts->pid == map->pid)
- return 1;
- }
-
- if (opts->parse_mask & PARSE_MAP_NAME) {
- if (!strcmp(opts->name, map->name))
- return 1;
- }
-
- if (opts->parse_mask & PARSE_PROCESS_NAME) {
- if (!strcmp(opts->name, get_name_by_pid(map->pid)))
- return 1;
- }
+ if (is_parse_option(opts, PARSE_NOADD_TREE))
+ return 0;
- return 0;
+ return 1;
}
/* Read data from the /proc/pid/pagemap file */
-static int parse_pageframe(FILE *file, struct pageframe *pf_tree,
+static int parse_pageframe(FILE *file, struct rb_root *root,
struct maps *maps, struct parse_opts *opts)
{
struct maps *map;
struct pageframe *match, *pageframe = NULL;
long start, len, i;
unsigned long long pf[10240];
- int ret, error;
+ int ret;
if (maps == NULL)
return 0;
start = map->start >> (PAGE_SHIFT - 3);
len = map->size >> (PAGE_SHIFT);
+ if (!should_scan_mapping(opts, map))
+ continue;
+
ret = fseek(file, start, SEEK_SET);
if (ret) {
- error = errno;
- fprintf(stderr, "Error seeking to %lx: %s\n", start,
- strerror(error));
+ fprintf(stderr, "Error seeking to %lx: %m\n", start);
continue;
}
MIN(sizeof(pf), (len - i) * 8), file);
}
if (ret < 0) {
- error = errno;
continue;
}
if (!pageframe)
if (!pf[ret / sizeof(pf[0])])
continue;
- pageframe_to_struct(pf[ret / sizeof(pf[0])], pageframe);
+ pageframe->pf = (pf[ret / sizeof(pf[0])]);
/* ignore unused pages */
- if (!(pageframe->page_swapped ||
- pageframe->page_present))
+ if (!(page_swapped(pageframe) ||
+ page_present(pageframe)))
continue;
- if (check_parse_opts(opts, pageframe, map)) {
- match = tree_to_pageframe(
- bintree_add(&pf_tree->tree,
- &pageframe->tree,
- &pageframe_ops));
- } else {
- match = tree_to_pageframe(
- bintree_find(&pf_tree->tree,
- &pageframe->tree,
- &pageframe_ops));
- }
+ if (should_add_to_tree(opts, pageframe, map))
+ match = pf_insert(root, pageframe);
+ else
+ match = pf_search(root, pageframe);
if (match == NULL)
continue;
* Add a link from the physical page to this
* process's page map
*/
- if (!match->ml) {
- match->ml = alloc_maplist();
- match->ml->map = map;
- } else {
- tmp = alloc_maplist();
- tmp->map = map;
- list_add(&match->ml->list, &tmp->list);
- }
+ tmp = alloc_maplist();
+ tmp->map = map;
+ list_add(&tmp->list, &match->ml);
- if (match->page_present)
+ if (page_present(match))
map->pages_present++;
- else if (match->page_swapped)
+ else if (page_swapped(match))
map->pages_swapped++;
}
}
return 0;
}
-static int read_pageframe(int pid, int tid, struct pageframe *pageframe,
- struct process **process_list, struct parse_opts *opts)
+static int read_pageframe(int pid, int tid, struct rb_root *root,
+ struct process *process_list, struct parse_opts *opts)
{
struct maps *maps;
struct process *process;
+ struct pidlist *pidl, *n;
FILE *file;
char path[512];
- process = malloc(sizeof(*process));
- memset(process, 0, sizeof(*process));
+ process = calloc(sizeof(*process), 1);
INIT_LIST_HEAD(&process->list);
- if (*process_list == NULL)
- *process_list = process;
-
process->pid = pid;
process->tid = tid;
- list_add_tail(&process->list, &(*process_list)->list);
+ if (!should_scan_process(opts, process))
+ goto free;
snprintf(path, sizeof(path), "/proc/%d/task/%d/maps", pid, tid);
file = fopen(path, "rb");
if (!file)
- return 0;
+ goto free;
maps = parse_maps(file, pid, tid);
fclose(file);
file = fopen(path, "rb");
if (!file)
- return 0;
+ goto free;
- parse_pageframe(file, pageframe, maps, opts);
+ parse_pageframe(file, root, maps, opts);
fclose(file);
if (read_cmdline(pid, tid, process->name, sizeof(process->name)))
- return 1;
+ goto free;
- if (maps == NULL)
- return 1;
+ if (!is_parse_option(opts, PARSE_NOADD_TREE))
+ process->is_initial_pid = 1;
- list_for_each_entry(maps, &process->maps->list, list) {
- process->pages_present += maps->pages_present;
- process->pages_swapped += maps->pages_swapped;
- }
+ list_add_tail(&process->list, &process_list->list);
return 1;
-}
-
-static int parse_pid(DIR **dir)
-{
- struct dirent *dirent;
- int error;
-
-restart:
- dirent = readdir(*dir);
- if (!dirent) {
- if (errno == 0) {
- closedir(*dir);
- *dir = NULL;
- return 0;
- }
- error = errno;
- printf("Failed to read /proc directory: %s\n", strerror(error));
- return -1;
- }
-
- if (dirent->d_name[0] < '0' || dirent->d_name[0] > '9')
- goto restart;
-
- return atoi(dirent->d_name);
-}
-
-static int opendir_check(DIR **dir, const char *path)
-{
- int error;
-
- if (!*dir) {
- *dir = opendir(path);
- if (!dir) {
- error = errno;
- fprintf(stderr, "Failed to open %s directory: %s\n",
- path, strerror(error));
- return -1;
- }
- }
-
- return 0;
-}
-
-static int get_next_tid(int pid, DIR **dir)
-{
- if (*dir == NULL) {
- char path[64];
-
- snprintf(path, sizeof(path), "/proc/%d/task/", pid);
- if (opendir_check(dir, path))
- return -1;
- }
-
- return parse_pid(dir);
-}
-
-static int get_next_pid(DIR **dir)
-{
- if (opendir_check(dir, "/proc"))
- return -1;
-
- return parse_pid(dir);
-}
-
-static int get_next_pid_by_name(DIR **dir, char *name)
-{
- int pid;
- char *pname;
-
- if (opendir_check(dir, "/proc"))
- return -1;
-
- while (1) {
- pid = parse_pid(dir);
- if (pid <= 0)
+free:
+ free(process);
+
+ /*
+ * Remove the pid from the list. It is no longer an
+ * interesting pid, since we can't access its data
+ */
+ list_for_each_entry_safe(pidl, n, &opts->pidlist, list) {
+ if (pidl->pid == pid) {
+ list_del(&pidl->list);
+ free(pidl);
break;
-
- pname = get_name_by_pid(pid);
- if (pname == NULL)
- continue;
- if (strcmp(pname, name))
- continue;
-
- return pid;
+ }
}
return 0;
}
static int read_pageframe_with_threads(int pid,
- struct pageframe *pageframe,
- struct process **process_list,
+ struct rb_root *root,
+ struct process *process_list,
struct parse_opts *opts)
{
DIR *dir = NULL;
if (tid <= 0)
return count;
- count += read_pageframe(pid, tid, pageframe, process_list,
- opts);
+ count += read_pageframe(pid, tid, root, process_list, opts);
if (!opts->with_threads)
break;
return count;
}
-int scan_all_pids(struct pageframe *pf, struct process **process_list,
+int scan_all_pids(struct rb_root *root, struct process *process_list,
struct parse_opts *opts)
{
+ struct pidlist *pidlist, *n;
DIR *dir = NULL;
int pid;
int count = 0;
+ int len = 0, i;
- if (opts->parse_mask & PARSE_PROCESS_NAME) {
- while ((pid = get_next_pid_by_name(&dir, opts->name))) {
- count += read_pageframe_with_threads(pid, pf,
- process_list,
- opts);
+ if (is_parse_option(opts, PARSE_PID)) {
+ list_for_each_entry_safe(pidlist, n, &opts->pidlist, list) {
+ count += read_pageframe_with_threads(pidlist->pid, root,
+ process_list, opts);
}
- dir = NULL;
}
- if (opts->parse_mask & PARSE_PID)
- count = read_pageframe_with_threads(opts->pid, pf, process_list,
- opts);
-
- if ((count == 0) && !(opts->parse_mask & PARSE_MAP_NAME)) {
+ if ((count == 0) && !(is_parse_option(opts, PARSE_MAP_NAME))) {
printf("Failed to find any matching processes "
"with given arguments\n");
return -1;
}
+ if (is_parse_option(opts, PARSE_DUMP))
+ return 0;
+
+ if (is_parse_option(opts, PARSE_MAP_NAME) &&
+ !is_parse_option(opts, PARSE_PID)) {
+ printf("Scanning page mappings for process: ");
+ while (1) {
+ pid = get_next_pid(&dir);
+ if (pid <= 0)
+ break;
+
+ for (i = 0; i < len; i++)
+ putchar('\b');
+ len = printf("% 5d", pid);
+ fflush(stdout);
+
+ read_pageframe_with_threads(pid, root, process_list,
+ opts);
+ }
+
+ for (i = 0; i < len; i++)
+ putchar('\b');
+ printf("Done \n");
+ len = 0;
+ }
+ /* Do not add new pages in the tree after the initial scan */
+ opts->parse_mask |= PARSE_NOADD_TREE;
+
+ printf("Scanning page mappings for process: ");
while (1) {
pid = get_next_pid(&dir);
if (pid <= 0)
break;
- read_pageframe_with_threads(pid, pf, process_list, opts);
+
+ for (i = 0; i < len; i++)
+ putchar('\b');
+ len = printf("% 5d", pid);
+ fflush(stdout);
+
+ read_pageframe_with_threads(pid, root, process_list, opts);
+ }
+ for (i = 0; i < len; i++)
+ putchar('\b');
+ printf("Done \n");
+
+ return 0;
+}
+
+int update_kpageflags(struct rb_root *root)
+{
+ struct pageframe *pf;
+ int kpageflags_fd;
+ int kpagecount_fd;
+ int ret;
+
+ kpageflags_fd = open("/proc/kpageflags", O_RDONLY);
+ if (kpageflags_fd < 0)
+ return -1;
+
+ kpagecount_fd = open("/proc/kpagecount", O_RDONLY);
+ if (kpagecount_fd < 0)
+ return -1;
+
+ pf = rb_to_pageframe(rb_first(root));
+
+ while(pf) {
+ long int pfnn = pfn(pf) * sizeof(pf->kpageflags);
+
+ ret = lseek(kpageflags_fd, pfnn, SEEK_SET);
+ if (ret < 0) {
+ fprintf(stderr, "Error seeking to %lx: %m\n", pfnn);
+ return -1;
+ }
+
+ ret = read(kpageflags_fd, &pf->kpageflags,
+ sizeof(pf->kpageflags));
+ if (ret < 0) {
+ fprintf(stderr, "Error reading from %llx: %m\n",
+ pf->pf * sizeof(pf->kpageflags));
+ return -1;
+ }
+
+ ret = lseek(kpagecount_fd, pfnn, SEEK_SET);
+ if (ret < 0) {
+ fprintf(stderr, "Error seeking to %lx: %m\n", pfnn);
+ return -1;
+ }
+
+ ret = read(kpagecount_fd, &pf->kpagecount,
+ sizeof(pf->kpagecount));
+ if (ret < 0) {
+ fprintf(stderr, "Error reading from %llx: %m\n",
+ pf->pf * sizeof(pf->kpagecount));
+ return -1;
+ }
+
+ pf = rb_to_pageframe(rb_next(&pf->tree));
}
+ close(kpageflags_fd);
+ close(kpagecount_fd);
+
return 0;
}
projects / scan-pagemap / blobdiff