/*      $NetBSD: rf_debugMem.c,v 1.22 2019/02/09 03:34:00 christos Exp $        */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Daniel Stodolsky, Mark Holland, Jim Zelenka
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
*  Software Distribution Coordinator  or  [email protected]
*  School of Computer Science
*  Carnegie Mellon University
*  Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/

/* debugMem.c:  memory usage debugging stuff.
* Malloc, Calloc, and Free are #defined everywhere
* to do_malloc, do_calloc, and do_free.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rf_debugMem.c,v 1.22 2019/02/09 03:34:00 christos Exp $");

#include <dev/raidframe/raidframevar.h>

#include "rf_threadstuff.h"
#include "rf_options.h"
#include "rf_debugMem.h"
#include "rf_general.h"
#include "rf_shutdown.h"

#if RF_DEBUG_MEM

static size_t tot_mem_in_use = 0;

/* Hash table of information about memory allocations */
#define RF_MH_TABLESIZE 1000

struct mh_struct {
       void   *address;
       size_t     size;
       const char *file;
       uint32_t     line;
       char    allocated;
       struct mh_struct *next;
};
static struct mh_struct *mh_table[RF_MH_TABLESIZE];
static rf_declare_mutex2(rf_debug_mem_mutex);
static int mh_table_initialized = 0;

static void memory_hash_insert(void *, size_t,  const char *, uint32_t);
static int memory_hash_remove(void *, size_t);

void
rf_record_malloc(void *p, size_t size, const char *file, uint32_t line)
{
       RF_ASSERT(size != 0);

       /* rf_lock_mutex2(rf_debug_mem_mutex); */
       memory_hash_insert(p, size, file, line);
       tot_mem_in_use += size;
       /* rf_unlock_mutex2(rf_debug_mem_mutex); */
       if ((intptr_t)p == rf_memDebugAddress) {
               printf("%s,%d: %s: Debug address allocated\n", file, line,
                   __func__);
       }
}

void
rf_unrecord_malloc(void *p, size_t sz)
{
       size_t     size;

       /* rf_lock_mutex2(rf_debug_mem_mutex); */
       size = memory_hash_remove(p, sz);
       tot_mem_in_use -= size;
       /* rf_unlock_mutex2(rf_debug_mem_mutex); */
       if ((intptr_t) p == rf_memDebugAddress) {
               /* this is really only a flag line for gdb */
               printf("%s: Found debug address\n", __func__);
       }
}

void
rf_print_unfreed(void)
{
       size_t i;
       int foundone = 0;
       struct mh_struct *p;

       for (i = 0; i < RF_MH_TABLESIZE; i++) {
               for (p = mh_table[i]; p; p = p->next) {
                       if (!p->allocated)
                               continue;
                       if (foundone) {
                               printf("\n\n:%s: There are unfreed memory"
                                   " locations at program shutdown:\n",
                                   __func__);
                       }
                       foundone = 1;
                       printf("%s: @%s,%d: addr %p size %zu\n", __func__,
                           p->file, p->line, p->address, p->size);
               }
       }
       if (tot_mem_in_use) {
               printf("%s: %zu total bytes in use\n",
                   __func__, tot_mem_in_use);
       }
}
#endif /* RF_DEBUG_MEM */

#if RF_DEBUG_MEM
static void
rf_ShutdownDebugMem(void *unused)
{
       rf_destroy_mutex2(rf_debug_mem_mutex);
}
#endif

int
rf_ConfigureDebugMem(RF_ShutdownList_t **listp)
{
#if RF_DEBUG_MEM
       size_t     i;

       rf_init_mutex2(rf_debug_mem_mutex, IPL_VM);
       if (rf_memDebug) {
               for (i = 0; i < RF_MH_TABLESIZE; i++)
                       mh_table[i] = NULL;
               mh_table_initialized = 1;
       }
       rf_ShutdownCreate(listp, rf_ShutdownDebugMem, NULL);
#endif
       return (0);
}

#if RF_DEBUG_MEM

#define HASHADDR(a) ((size_t)((((uintptr_t)a) >> 3) % RF_MH_TABLESIZE))

static void
memory_hash_insert(void *addr, size_t size, const char *file, uint32_t line)
{
       size_t bucket = (size_t)HASHADDR(addr);
       struct mh_struct *p;

       RF_ASSERT(mh_table_initialized);

       /* search for this address in the hash table */
       for (p = mh_table[bucket]; p && (p->address != addr); p = p->next)
               continue;
       if (!p) {
               p = RF_Malloc(sizeof(*p));
               RF_ASSERT(p);
               p->next = mh_table[bucket];
               mh_table[bucket] = p;
               p->address = addr;
               p->allocated = 0;
       }
       if (p->allocated) {
               printf("%s: @%s,%u: ERROR: Reallocated addr %p without free\n",
                   __func__, file, line, addr);
               printf("%s: last allocated @%s,%u\n",
                   __func__, p->file, p->line);
               RF_ASSERT(0);
       }
       p->size = size;
       p->line = line;
       p->file = file;
       p->allocated = 1;
}

static int
memory_hash_remove(void *addr, size_t sz)
{
       size_t bucket = HASHADDR(addr);
       struct mh_struct *p;

       RF_ASSERT(mh_table_initialized);
       for (p = mh_table[bucket]; p && (p->address != addr); p = p->next)
               continue;
       if (!p) {
               printf("%s: ERROR: Freeing never-allocated address %p\n",
                   __func__, addr);
               RF_PANIC();
       }
       if (!p->allocated) {
               printf("%s: ERROR: Freeing unallocated address %p."
                   " Last allocation @%s,%u\n",
                   __func__, addr, p->file, p->line);
               RF_PANIC();
       }
       if (sz > 0 && p->size != sz) {  /* you can suppress this error by
                                        * using a negative value as the size
                                        * to free */
               printf("%s: ERROR: Incorrect size (%zu should be %zu) at"
                   " free for address %p. Allocated @%s,%u\n", __func__,
                   sz, p->size, addr, p->file, p->line);
               RF_PANIC();
       }
       p->allocated = 0;
       return p->size;
}
#endif /* RF_DEBUG_MEM */

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.