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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include <stdarg.h>
#include "error.h"
#ifndef _DEBUG
#define MEMLOG(x)
#else
void MEMLOG(char *s, ...)
{
va_list ap;
FILE *fh = fopen("log.log", "a+");
if (!fh)
error_exit("error logging\n");
va_start(ap, s);
vfprintf(fh, s, ap);
va_end(ap);
fclose(fh);
}
typedef struct
{
void *p;
char *descr;
int size;
} memlist;
memlist *pm = NULL;
int n_pm = 0;
void dump_mem(int sig)
{
int loop;
signal(SIGHUP, dump_mem);
if (sig != SIGHUP)
error_exit("dump_mem: unexpected signal %d for dump_mem\n", sig);
MEMLOG("%d elements of memory used\n", n_pm);
for(loop=0; loop<n_pm; loop++)
{
MEMLOG("%06d] %p %d (%s)\n", loop, pm[loop].p, pm[loop].size, pm[loop].descr);
}
MEMLOG("--- finished memory dump\n");
}
int remove_mem_element(void *p)
{
int old_size = 0;
if (p)
{
int loop;
for(loop=0; loop<n_pm; loop++)
{
if (pm[loop].p == p)
{
int n_to_move;
old_size = pm[loop].size;
n_to_move = (n_pm - loop) - 1;
if (n_to_move > 0)
memmove(&pm[loop], &pm[loop + 1], n_to_move * sizeof(memlist));
else if (n_to_move < 0)
error_exit("remove_mem_element: n_to_move < 0!\n");
n_pm--;
loop=-1;
break;
}
}
if (loop != -1)
{
MEMLOG("remove_mem_element: pointer %p not found\n", p);
}
if (n_pm)
{
pm = (memlist *)realloc(pm, sizeof(memlist) * n_pm);
if (!pm) error_exit("remove_mem_element: failed to shrink memorylist to %d elements\n", n_pm);
}
else
{
free(pm);
pm = NULL;
}
}
return old_size;
}
void add_mem_element(void *p, int size, char *what)
{
pm = (memlist *)realloc(pm, sizeof(memlist) * (n_pm + 1));
if (!pm) error_exit("add_mem_element: failed to grow memorylist from %d elements\n", n_pm);
pm[n_pm].p = p;
pm[n_pm].size = size;
pm[n_pm].descr = what;
n_pm++;
}
#endif
void myfree(void *p)
{
#ifdef _DEBUG
int old_size = remove_mem_element(p);
#endif
free(p);
}
void * myrealloc(void *oldp, int new_size, char *what)
{
#ifdef _DEBUG
int old_size;
void *newp;
/* static int rand_val;
char rand_val_init = 0;
int rand_size;
if (!rand_val_init)
{
srand48((int)time(NULL) + (int)getpid());
rand_val_init = 1;
}
do
{
rand_val = lrand48();
}
while(rand_val == 0);
*/
newp = realloc(oldp, new_size);
if (!newp)
error_exit("myrealloc: failed to reallocate to %d bytes for %s\n", new_size, what);
old_size = remove_mem_element(oldp);
add_mem_element(newp, new_size, what);
signal(SIGHUP, dump_mem);
/* rand_size = new_size - old_size;
if (rand_size > 0)
{
MEMLOG("randomizing(%s) %d bytes\n", what, rand_size);
memset(&((char *)newp)[old_size], rand_val, rand_size);
}
*/
#else
/* ----------------------------------------------------
* add code for repeatingly retry? -> then configurable
* via configurationfile with number of retries and/or
* sleep
* ----------------------------------------------------
*/
void *newp = realloc(oldp, new_size);
if (!newp)
error_exit("myrealloc: failed to reallocate to %d bytes for %s\n", new_size, what);
#endif
return newp;
}
void * mymalloc(int size, char *what)
{
return myrealloc(NULL, size, what);
}
char * mystrdup(char *in, char *what)
{
#ifdef _DEBUG
int len = strlen(in) + 1;
char *newp = (char *)mymalloc(len, what);
memcpy(newp, in, len);
return newp;
#else
char *newp = strdup(in);
if (!newp)
error_exit("mystrdup: out of memory for %s\n", what);
return newp;
#endif
}
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