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/*
* Copyright (C) 1996-2025 The Squid Software Foundation and contributors
*
* Squid software is distributed under GPLv2+ license and includes
* contributions from numerous individuals and organizations.
* Please see the COPYING and CONTRIBUTORS files for details.
*/
#include "squid.h"
#include "compat/xalloc.h"
#if XMALLOC_STATISTICS
#define XMS_DBG_MAXSIZE (1024*1024)
#define XMS_DBG_SPLIT (256) /* mallocs below this value are tracked with DBG_GRAIN_SM precision instead of DBG_GRAIN */
#define XMS_DBG_GRAIN (16)
#define XMS_DBG_GRAIN_SM (4)
#define XMS_DBG_OFFSET (XMS_DBG_SPLIT/XMS_DBG_GRAIN_SM - XMS_DBG_SPLIT/XMS_DBG_GRAIN )
#define XMS_DBG_MAXINDEX (XMS_DBG_MAXSIZE/XMS_DBG_GRAIN + XMS_DBG_OFFSET)
static int malloc_sizes[XMS_DBG_MAXINDEX + 1];
static int malloc_histo[XMS_DBG_MAXINDEX + 1];
static int dbg_stat_init = 0;
static int
XMS_DBG_INDEX(int sz)
{
if (sz >= XMS_DBG_MAXSIZE)
return XMS_DBG_MAXINDEX;
if (sz <= XMS_DBG_SPLIT)
return (sz + XMS_DBG_GRAIN_SM - 1) / XMS_DBG_GRAIN_SM;
return (sz + XMS_DBG_GRAIN - 1) / XMS_DBG_GRAIN + XMS_DBG_OFFSET;
}
static void
stat_init(void)
{
for (int i = 0; i <= XMS_DBG_MAXINDEX; ++i)
malloc_sizes[i] = malloc_histo[i] = 0;
dbg_stat_init = 1;
}
static int
malloc_stat(int sz)
{
if (!dbg_stat_init)
stat_init();
return malloc_sizes[XMS_DBG_INDEX(sz)] += 1;
}
void
malloc_statistics(void (*func) (int, int, int, void *), void *data)
{
int i = 0;
for (; i <= XMS_DBG_SPLIT; i += XMS_DBG_GRAIN_SM)
func(i, malloc_sizes[XMS_DBG_INDEX(i)], malloc_histo[XMS_DBG_INDEX(i)], data);
i -= XMS_DBG_GRAIN_SM;
for (; i <= XMS_DBG_MAXSIZE; i += XMS_DBG_GRAIN)
func(i, malloc_sizes[XMS_DBG_INDEX(i)], malloc_histo[XMS_DBG_INDEX(i)], data);
memcpy(&malloc_histo, &malloc_sizes, sizeof(malloc_sizes));
}
#endif /* XMALLOC_STATISTICS */
void *
xcalloc(size_t n, size_t sz)
{
if (n < 1)
n = 1;
if (sz < 1)
sz = 1;
void *p = calloc(n, sz);
if (!p) {
if (failure_notify) {
static char msg[128];
snprintf(msg, 128, "xcalloc: Unable to allocate %zu blocks of %zu bytes!\n", n, sz);
failure_notify(msg);
} else {
perror("xcalloc");
}
exit(1);
}
#if XMALLOC_STATISTICS
malloc_stat(sz * n);
#endif
return p;
}
void *
xmalloc(size_t sz)
{
if (sz < 1)
sz = 1;
void *p = malloc(sz);
if (!p) {
if (failure_notify) {
static char msg[128];
snprintf(msg, 128, "xmalloc: Unable to allocate %zu bytes!\n", sz);
failure_notify(msg);
} else {
perror("malloc");
}
exit(1);
}
#if XMALLOC_STATISTICS
malloc_stat(sz);
#endif
return (p);
}
void *
xrealloc(void *s, size_t sz)
{
if (sz < 1)
sz = 1;
void *p= realloc(s, sz);
if (!p) {
if (failure_notify) {
static char msg[128];
snprintf(msg, 128, "xrealloc: Unable to reallocate %zu bytes!\n", sz);
failure_notify(msg);
} else {
perror("realloc");
}
exit(1);
}
#if XMALLOC_STATISTICS
malloc_stat(sz);
#endif
return (p);
}
void
free_const(const void *s_const)
{
void *s = const_cast<void *>(s_const);
free(s);
}
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