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/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop 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,
or (at your option) any later version.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glib.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/procmap.h>
#include <linux/kdev_t.h>
#include <stddef.h>
#include "glibtop_private.h"
#define MAPS_FILE "/proc/%u/maps"
#define SMAPS_FILE "/proc/%u/smaps"
#define PROC_MAPS_FORMAT "%16llx-%16llx %4c %16llx %02hx:%02hx %llu%*[ ]%n"
static const unsigned long _glibtop_sysdeps_proc_map =
(1L << GLIBTOP_PROC_MAP_NUMBER) + (1L << GLIBTOP_PROC_MAP_TOTAL) +
(1L << GLIBTOP_PROC_MAP_SIZE);
static const unsigned long _glibtop_sysdeps_map_entry =
(1L << GLIBTOP_MAP_ENTRY_START) + (1L << GLIBTOP_MAP_ENTRY_END) +
(1L << GLIBTOP_MAP_ENTRY_OFFSET) + (1L << GLIBTOP_MAP_ENTRY_PERM) +
(1L << GLIBTOP_MAP_ENTRY_INODE) + (1L << GLIBTOP_MAP_ENTRY_DEVICE) +
(1L << GLIBTOP_MAP_ENTRY_FILENAME);
static const unsigned long _glibtop_sysdeps_map_entry_smaps =
(1UL << GLIBTOP_MAP_ENTRY_SIZE) + (1UL << GLIBTOP_MAP_ENTRY_RSS) +
(1UL << GLIBTOP_MAP_ENTRY_SHARED_DIRTY) + (1UL << GLIBTOP_MAP_ENTRY_SHARED_CLEAN) +
(1UL << GLIBTOP_MAP_ENTRY_PRIVATE_DIRTY) + (1UL << GLIBTOP_MAP_ENTRY_PRIVATE_CLEAN);
/* Init function. */
void
_glibtop_init_proc_map_s (glibtop *server)
{
server->sysdeps.proc_map = _glibtop_sysdeps_proc_map;
}
/* Provides detailed information about a process. */
static void
add_smaps(glibtop *server, FILE *smaps, glibtop_map_entry *entry)
{
#define SMAP_OFFSET(MEMBER) offsetof(glibtop_map_entry, MEMBER)
struct smap_value {
char name[15];
ptrdiff_t offset;
};
const struct smap_value values[] = {
{ "Size:", SMAP_OFFSET(size) },
{ "Rss:", SMAP_OFFSET(rss) },
{ "Shared_Clean:", SMAP_OFFSET(shared_clean) },
{ "Shared_Dirty:", SMAP_OFFSET(shared_dirty) },
{ "Private_Clean:", SMAP_OFFSET(private_clean) },
{ "Private_Dirty:", SMAP_OFFSET(private_dirty) }
};
size_t i;
for (i = 0; i < G_N_ELEMENTS(values); ++i) {
char line[80];
char *offset;
guint64 *value;
if (!fgets(line, sizeof line, smaps) || !g_str_has_prefix(line, values[i].name)) {
glibtop_warn_io_r(server,
"Could not read smaps value %s",
values[i].name);
return;
}
offset = (void*) entry;
offset += values[i].offset;
value = (void*) offset;
*value = get_scaled(line, values[i].name);
}
entry->flags |= _glibtop_sysdeps_map_entry_smaps;
#undef SMAP_OFFSET
}
glibtop_map_entry *
glibtop_get_proc_map_s (glibtop *server, glibtop_proc_map *buf, pid_t pid)
{
char procfilename[GLIBTOP_MAP_FILENAME_LEN+1];
/*
default size of 100 maybe inaccurate.
It's the average number of entry per process on my laptop
*/
GArray *entry_list = g_array_sized_new(FALSE, FALSE,
sizeof(glibtop_map_entry),
100);
FILE *maps;
const char *filename;
gboolean has_smaps;
char *line = NULL;
size_t line_size = 0;
memset (buf, 0, sizeof (glibtop_proc_map));
has_smaps = server->os_version_code >= LINUX_VERSION_CODE(2, 6, 14);
if (has_smaps)
filename = SMAPS_FILE;
else
filename = MAPS_FILE;
snprintf (procfilename, sizeof procfilename, filename, (unsigned)pid);
if((maps = fopen (procfilename, "r")) == NULL) {
return (glibtop_map_entry*) g_array_free(entry_list, TRUE);
}
while(TRUE)
{
unsigned long perm = 0;
guint len;
int line_end;
unsigned short dev_major, dev_minor;
guint64 start, end, offset, inode;
char flags[4];
char *filename;
glibtop_map_entry *entry;
if (getline(&line, &line_size, maps) == -1)
break;
if (sscanf(line, PROC_MAPS_FORMAT,
&start, &end, flags, &offset,
&dev_major, &dev_minor, &inode, &line_end) != 7)
continue;
filename = line + line_end;
g_strstrip(filename);
/* Compute access permissions. */
if (flags [0] == 'r')
perm |= GLIBTOP_MAP_PERM_READ;
if (flags [1] == 'w')
perm |= GLIBTOP_MAP_PERM_WRITE;
if (flags [2] == 'x')
perm |= GLIBTOP_MAP_PERM_EXECUTE;
if (flags [3] == 's')
perm |= GLIBTOP_MAP_PERM_SHARED;
else if (flags [3] == 'p')
perm |= GLIBTOP_MAP_PERM_PRIVATE;
/*
avoid copying the entry, grow by 1 and point to the last
element.
*/
len = entry_list->len;
g_array_set_size(entry_list, len + 1);
entry = &g_array_index(entry_list, glibtop_map_entry, len);
entry->flags = _glibtop_sysdeps_map_entry;
entry->start = start;
entry->end = end;
entry->offset = offset;
entry->perm = perm;
entry->device = MKDEV(dev_major, dev_minor);
entry->inode = inode;
g_strlcpy(entry->filename, filename, sizeof entry->filename);
if (has_smaps)
add_smaps(server, maps, entry);
}
free(line);
fclose (maps);
buf->flags = _glibtop_sysdeps_proc_map;
buf->number = entry_list->len;
buf->size = sizeof (glibtop_map_entry);
buf->total = buf->number * buf->size;
return (glibtop_map_entry*) g_array_free(entry_list, FALSE);
}
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