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new files to monitor memory usage

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This commit is contained in:
Frederic Culot 2008-12-28 13:15:18 +00:00
parent 5352496984
commit fe58fe674d
2 changed files with 312 additions and 0 deletions
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248
src/mem.c Normal file
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/* $calcurse: mem.c,v 1.1 2008/12/28 13:15:18 culot Exp $ */
/*
* Calcurse - text-based organizer
* Copyright (c) 2008 Frederic Culot
*
* 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, or
* (at your option) any later version.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Send your feedback or comments to : calcurse@culot.org
* Calcurse home page : http://culot.org/calcurse
*
*/
#include <string.h>
#include <stdio.h>
#include "i18n.h"
#include "utils.h"
#include "mem.h"
enum {
BLK_STATE,
BLK_SIZE,
BLK_ID,
EXTRA_SPACE_START
};
#define EXTRA_SPACE_END 1
#define EXTRA_SPACE EXTRA_SPACE_START + EXTRA_SPACE_END
#define MAGIC_ALLOC 0xda
#define MAGIC_FREE 0xdf
struct mem_blk_s {
unsigned id, size;
const char *pos;
struct mem_blk_s *next;
};
typedef struct {
unsigned ncall, nalloc, nfree;
struct mem_blk_s *blk;
} mem_stats_t;
static mem_stats_t mstats;
unsigned
stats_add_blk (size_t size, const char *pos)
{
struct mem_blk_s *o, **i;
o = malloc (sizeof (struct mem_blk_s));
EXIT_IF (o == 0, _("could not allocate memory to store block info"));
mstats.ncall++;
o->pos = pos;
o->size = (unsigned)size;
o->next = 0;
i = &mstats.blk;
for (i = &mstats.blk; *i; i = &(*i)->next)
;
o->id = mstats.ncall;
*i = o;
return o->id;
}
void
stats_del_blk (unsigned id)
{
struct mem_blk_s *o, **i;
EXIT_IF (id < 0, _("Incorrect block id"));
i = &mstats.blk;
for (o = mstats.blk; o; o = o->next)
{
if (o->id == id)
{
*i = o->next;
free (o);
return;
}
i = &o->next;
}
EXIT (_("Block not found"));
/* NOTREACHED */
}
void *
dbg_malloc (size_t size, const char *pos)
{
unsigned *buf;
if (size == 0)
return (void *)0;
size = EXTRA_SPACE + (size + sizeof (unsigned) - 1) / sizeof (unsigned);
if ((buf = (unsigned *)malloc (size * sizeof (unsigned))) == 0)
return (void *)0;
buf[BLK_STATE] = MAGIC_ALLOC; /* state of the block */
buf[BLK_SIZE] = size; /* size of the block */
buf[BLK_ID] = stats_add_blk (size, pos); /* identify a block by its id */
buf[size - 1] = buf[BLK_ID]; /* mark at end of block */
mstats.nalloc += size;
return (void *)(buf + EXTRA_SPACE_START);
}
void *
dbg_calloc (size_t nmemb, size_t size, const char *pos)
{
void *buf;
if (!nmemb || !size)
return (void *)0;
EXIT_IF (nmemb > SIZE_MAX / size, _("overflow at %s"), pos);
size *= nmemb;
if ((buf = dbg_malloc (size, pos)) == 0)
return (void *)0;
bzero (buf, size);
return buf;
}
void *
dbg_realloc (void *ptr, size_t size, const char *pos)
{
unsigned *buf, old_size;
if (size == 0 || ptr == 0)
return (void *)0;
if ((buf = dbg_malloc (size, pos)) == 0)
return (void *)0;
old_size = *((unsigned *)ptr - EXTRA_SPACE_START + BLK_SIZE);
bcopy (ptr, buf + EXTRA_SPACE_START, old_size);
mem_free (ptr);
mstats.nalloc += size;
return (void *)(buf + EXTRA_SPACE_START);
}
char *
dbg_strdup (const char *s, const char *pos)
{
size_t size;
char *buf;
if (s == 0)
return (char *)0;
size = strlen (s);
if ((buf = dbg_malloc (size + 1, pos)) == 0)
return (char *)0;
return strncpy (buf, s, size + 1);
}
void
dbg_free (void *ptr, const char *pos)
{
unsigned *buf, size;
if (ptr == 0)
return;
buf = (unsigned *)ptr - EXTRA_SPACE_START;
size = buf[BLK_SIZE];
EXIT_IF (buf[BLK_STATE] == MAGIC_FREE,
_("block seems already freed at %s"), pos);
EXIT_IF (buf[BLK_STATE] != MAGIC_ALLOC,
_("corrupt block header at %s"), pos);
EXIT_IF (buf[size - 1] != buf[BLK_ID],
_("corrupt block end at %s, (end = %u, should be %d)"), pos,
buf[size - 1], buf[BLK_ID]);
buf[0] = MAGIC_FREE;
stats_del_blk (buf[BLK_ID]);
free (buf);
mstats.nfree += size;
}
#ifdef CALCURSE_MEMORY_DEBUG
static void
dump_block_info (struct mem_blk_s *blk)
{
if (blk == 0)
return;
printf (_("---==== MEMORY BLOCK ====----------------\n"));
printf (_(" id: %u\n"), blk->id);
printf (_(" size: %u\n"), blk->size);
printf (_(" allocated in: %s\n"), blk->pos);
printf (_("-----------------------------------------\n"));
}
void
mem_stats (void)
{
printf ("\n");
printf (_("+------------------------------+\n"));
printf (_("| calcurse memory usage report |\n"));
printf (_("+------------------------------+\n"));
printf (_(" number of calls: %u\n"), mstats.ncall);
printf (_(" allocated blocks: %u\n"), mstats.nalloc);
printf (_(" unfreed blocks: %u\n"), mstats.nalloc - mstats.nfree);
printf ("\n");
if (mstats.nfree < mstats.nalloc)
{
struct mem_blk_s *blk;
for (blk = mstats.blk; blk; blk = blk->next)
dump_block_info (blk);
}
}
#endif /* CALCURSE_MEMORY_DEBUG */

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/* $calcurse: mem.h,v 1.1 2008/12/28 13:15:18 culot Exp $ */
/*
* Calcurse - text-based organizer
* Copyright (c) 2008 Frederic Culot
*
* 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, or
* (at your option) any later version.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Send your feedback or comments to : calcurse@culot.org
* Calcurse home page : http://culot.org/calcurse
*
*/
#ifndef CALCURSE_MEM_H
#define CALCURSE_MEM_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#ifdef CALCURSE_MEMORY_DEBUG
#include <stdlib.h>
#include "utils.h"
#define mem_malloc(s) dbg_malloc ((s), __FILE_POS__)
#define mem_calloc(n, s) dbg_calloc ((n), (s), __FILE_POS__)
#define mem_realloc(p, s) dbg_realloc ((p), (s), __FILE_POS__)
#define mem_strdup(s) dbg_strdup ((s), __FILE_POS__)
#define mem_free(p) dbg_free ((p), __FILE_POS__)
void *dbg_malloc (size_t, const char *);
void *dbg_calloc (size_t, size_t, const char *);
void *dbg_realloc (void *, size_t, const char *);
char *dbg_strdup (const char *, const char *);
void dbg_free (void *, const char *);
void mem_stats (void);
#else /* !CALCURSE_MEMORY_DEBUG */
#define mem_malloc(s) malloc ((s))
#define mem_calloc(n, s) calloc ((n), (s))
#define mem_realloc(p, s) realloc ((p), (s))
#define mem_strdup(s) strdup ((s))
#define mem_free(p) free ((p))
#define mem_stats()
#endif /* CALCURSE_MEMORY_DEBUG */
#endif /* CALCURSE_MEM_H */