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q_malloc.c
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q_malloc.c
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/*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of Kamailio, a free SIP server.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* \file
* \brief Simple & fast malloc library
* \ingroup mem
*/
#if defined(Q_MALLOC)
#include <stdlib.h>
#include <string.h>
#include "q_malloc.h"
#include "../dprint.h"
#include "../globals.h"
#include "memdbg.h"
#include "../cfg/cfg.h" /* memlog */
#ifdef MALLOC_STATS
#include "../events.h"
#endif
#include "pkg.h"
/*useful macros*/
#define FRAG_END(f) \
((struct qm_frag_end*)((char*)(f)+sizeof(struct qm_frag)+ \
(f)->size))
#define FRAG_NEXT(f) \
((struct qm_frag*)((char*)(f)+sizeof(struct qm_frag)+(f)->size+ \
sizeof(struct qm_frag_end)))
#define FRAG_PREV(f) \
( (struct qm_frag*) ( ((char*)(f)-sizeof(struct qm_frag_end))- \
((struct qm_frag_end*)((char*)(f)-sizeof(struct qm_frag_end)))->size- \
sizeof(struct qm_frag) ) )
#define PREV_FRAG_END(f) \
((struct qm_frag_end*)((char*)(f)-sizeof(struct qm_frag_end)))
#define FRAG_OVERHEAD (sizeof(struct qm_frag)+sizeof(struct qm_frag_end))
#define ROUNDTO_MASK (~((unsigned long)ROUNDTO-1))
#define ROUNDUP(s) (((s)+(ROUNDTO-1))&ROUNDTO_MASK)
#define ROUNDDOWN(s) ((s)&ROUNDTO_MASK)
/* finds the hash value for s, s=ROUNDTO multiple*/
#define GET_HASH(s) ( ((unsigned long)(s)<=QM_MALLOC_OPTIMIZE)?\
(unsigned long)(s)/ROUNDTO: \
QM_MALLOC_OPTIMIZE/ROUNDTO+big_hash_idx((s))- \
QM_MALLOC_OPTIMIZE_FACTOR+1 )
#define UN_HASH(h) ( ((unsigned long)(h)<=(QM_MALLOC_OPTIMIZE/ROUNDTO))?\
(unsigned long)(h)*ROUNDTO: \
1UL<<((h)-QM_MALLOC_OPTIMIZE/ROUNDTO+\
QM_MALLOC_OPTIMIZE_FACTOR-1)\
)
/* mark/test used/unused frags */
#define FRAG_MARK_USED(f)
#define FRAG_CLEAR_USED(f)
#define FRAG_WAS_USED(f) (1)
/* other frag related defines:
* MEM_COALESCE_FRAGS
* MEM_FRAG_AVOIDANCE
*/
#define MEM_FRAG_AVOIDANCE
/* computes hash number for big buckets*/
inline static unsigned long big_hash_idx(unsigned long s)
{
int idx;
/* s is rounded => s = k*2^n (ROUNDTO=2^n)
* index= i such that 2^i > s >= 2^(i-1)
*
* => index = number of the first non null bit in s*/
idx=sizeof(long)*8-1;
for (; !(s&(1UL<<(sizeof(long)*8-1))) ; s<<=1, idx--);
return idx;
}
#ifdef DBG_QM_MALLOC
#define ST_CHECK_PATTERN 0xf0f0f0f0
#define END_CHECK_PATTERN1 0xc0c0c0c0
#define END_CHECK_PATTERN2 0xabcdefed
static void qm_debug_frag(struct qm_block* qm, struct qm_frag* f,
const char* file, unsigned int line)
{
if (f->check!=ST_CHECK_PATTERN){
LOG(L_CRIT, "BUG: qm_*: fragm. %p (address %p) "
"beginning overwritten (%lx)! Memory allocator was called "
"from %s:%u. Fragment marked by %s:%lu.\n",
f, (char*)f+sizeof(struct qm_frag),
f->check, file, line, f->file, f->line);
qm_status(qm);
abort();
};
if ((FRAG_END(f)->check1!=END_CHECK_PATTERN1)||
(FRAG_END(f)->check2!=END_CHECK_PATTERN2)){
LOG(L_CRIT, "BUG: qm_*: fragm. %p (address %p) "
"end overwritten (%lx, %lx)! Memory allocator was called "
"from %s:%u. Fragment marked by %s:%lu.\n",
f, (char*)f+sizeof(struct qm_frag),
FRAG_END(f)->check1, FRAG_END(f)->check2,
file, line, f->file, f->line);
qm_status(qm);
abort();
}
if ((f>qm->first_frag)&&
((PREV_FRAG_END(f)->check1!=END_CHECK_PATTERN1) ||
(PREV_FRAG_END(f)->check2!=END_CHECK_PATTERN2) ) ){
LOG(L_CRIT, "BUG: qm_*: prev. fragm. tail overwritten(%lx, %lx)[%p:%p]! "
"Memory allocator was called from %s:%u. Fragment marked by "
"%s:%lu.\n",
PREV_FRAG_END(f)->check1, PREV_FRAG_END(f)->check2, f,
(char*)f+sizeof(struct qm_frag), file, line, f->file, f->line);
qm_status(qm);
abort();
}
}
#endif
static inline void qm_insert_free(struct qm_block* qm, struct qm_frag* frag)
{
struct qm_frag* f;
struct qm_frag* prev;
int hash;
hash=GET_HASH(frag->size);
for(f=qm->free_hash[hash].head.u.nxt_free; f!=&(qm->free_hash[hash].head);
f=f->u.nxt_free){
if (frag->size <= f->size) break;
}
/*insert it here*/
prev=FRAG_END(f)->prev_free;
prev->u.nxt_free=frag;
FRAG_END(frag)->prev_free=prev;
frag->u.nxt_free=f;
FRAG_END(f)->prev_free=frag;
qm->free_hash[hash].no++;
qm->ffrags++;
}
/* init malloc and return a qm_block*/
struct qm_block* qm_malloc_init(char* address, unsigned long size, int type)
{
char* start;
char* end;
struct qm_block* qm;
unsigned long init_overhead;
int h;
/* make address and size multiple of 8*/
start=(char*)ROUNDUP((unsigned long) address);
DBG("qm_malloc_init: QM_OPTIMIZE=%lu, /ROUNDTO=%lu\n",
QM_MALLOC_OPTIMIZE, QM_MALLOC_OPTIMIZE/ROUNDTO);
DBG("qm_malloc_init: QM_HASH_SIZE=%lu, qm_block size=%lu\n",
QM_HASH_SIZE, (unsigned long)sizeof(struct qm_block));
DBG("qm_malloc_init(%p, %lu), start=%p\n", address,
(unsigned long)size, start);
if (size<start-address) return 0;
size-=(start-address);
if (size <(MIN_FRAG_SIZE+FRAG_OVERHEAD)) return 0;
size=ROUNDDOWN(size);
init_overhead=ROUNDUP(sizeof(struct qm_block))+sizeof(struct qm_frag)+
sizeof(struct qm_frag_end);
DBG("qm_malloc_init: size= %lu, init_overhead=%lu\n",
(unsigned long)size, init_overhead);
if (size < init_overhead)
{
/* not enough mem to create our control structures !!!*/
LOG(L_ERR, "qm_malloc_init(%lu); No memory left to create control structures!\n",
(unsigned long)size);
return 0;
}
end=start+size;
qm=(struct qm_block*)start;
memset(qm, 0, sizeof(struct qm_block));
qm->size=size;
qm->real_used=init_overhead;
qm->max_real_used=qm->real_used;
qm->type=type;
size-=init_overhead;
qm->first_frag=(struct qm_frag*)(start+ROUNDUP(sizeof(struct qm_block)));
qm->last_frag_end=(struct qm_frag_end*)(end-sizeof(struct qm_frag_end));
/* init initial fragment*/
qm->first_frag->size=size;
qm->last_frag_end->size=size;
#ifdef DBG_QM_MALLOC
qm->first_frag->check=ST_CHECK_PATTERN;
qm->last_frag_end->check1=END_CHECK_PATTERN1;
qm->last_frag_end->check2=END_CHECK_PATTERN2;
#endif
/* init free_hash* */
for (h=0; h<QM_HASH_SIZE;h++){
qm->free_hash[h].head.u.nxt_free=&(qm->free_hash[h].head);
qm->free_hash[h].tail.prev_free=&(qm->free_hash[h].head);
qm->free_hash[h].head.size=0;
qm->free_hash[h].tail.size=0;
}
/* link initial fragment into the free list*/
qm_insert_free(qm, qm->first_frag);
/*qm->first_frag->u.nxt_free=&(qm->free_lst);
qm->last_frag_end->prev_free=&(qm->free_lst);
*/
return qm;
}
static inline void qm_detach_free(struct qm_block* qm, struct qm_frag* frag)
{
struct qm_frag *prev;
struct qm_frag *next;
prev=FRAG_END(frag)->prev_free;
next=frag->u.nxt_free;
prev->u.nxt_free=next;
FRAG_END(next)->prev_free=prev;
}
#ifdef DBG_QM_MALLOC
static inline struct qm_frag* qm_find_free(struct qm_block* qm,
size_t size,
int *h,
unsigned int *count)
#else
static inline struct qm_frag* qm_find_free(struct qm_block* qm,
size_t size,
int* h)
#endif
{
int hash;
struct qm_frag* f;
for (hash=GET_HASH(size); hash<QM_HASH_SIZE; hash++){
for (f=qm->free_hash[hash].head.u.nxt_free;
f!=&(qm->free_hash[hash].head); f=f->u.nxt_free){
#ifdef DBG_QM_MALLOC
*count+=1; /* *count++ generates a warning with gcc 2.9* -Wall */
#endif
if (f->size>=size){ *h=hash; return f; }
}
/*try in a bigger bucket*/
}
/* not found */
LOG(L_ERR, "qm_find_free(%p, %lu); Free fragment not found!\n",
qm, (unsigned long)size);
return 0;
}
/* returns 0 on success, -1 on error;
* new_size < size & rounded-up already!*/
static inline
#ifdef DBG_QM_MALLOC
int split_frag(struct qm_block* qm, struct qm_frag* f, size_t new_size,
const char* file, const char* func, unsigned int line, const char *mname)
#else
int split_frag(struct qm_block* qm, struct qm_frag* f, size_t new_size)
#endif
{
size_t rest;
struct qm_frag* n;
struct qm_frag_end* end;
rest=f->size-new_size;
#ifdef MEM_FRAG_AVOIDANCE
if ((rest> (FRAG_OVERHEAD+QM_MALLOC_OPTIMIZE))||
(rest>=(FRAG_OVERHEAD+new_size))){/* the residue fragm. is big enough*/
#else
if (rest>(FRAG_OVERHEAD+MIN_FRAG_SIZE)){
#endif
f->size=new_size;
/*split the fragment*/
end=FRAG_END(f);
end->size=new_size;
n=(struct qm_frag*)((char*)end+sizeof(struct qm_frag_end));
n->size=rest-FRAG_OVERHEAD;
FRAG_END(n)->size=n->size;
FRAG_CLEAR_USED(n); /* never used */
qm->real_used+=FRAG_OVERHEAD;
#ifdef DBG_QM_MALLOC
end->check1=END_CHECK_PATTERN1;
end->check2=END_CHECK_PATTERN2;
/* frag created by malloc, mark it*/
n->file=file;
n->func=func;
n->line=line;
n->mname=mname;
n->check=ST_CHECK_PATTERN;
#endif
/* reinsert n in free list*/
qm_insert_free(qm, n);
return 0;
}else{
/* we cannot split this fragment any more */
return -1;
}
}
#ifdef DBG_QM_MALLOC
void* qm_malloc(void* qmp, size_t size,
const char* file, const char* func, unsigned int line,
const char *mname)
#else
void* qm_malloc(void* qmp, size_t size)
#endif
{
struct qm_block* qm;
struct qm_frag* f;
int hash;
#ifdef DBG_QM_MALLOC
unsigned int list_cntr;
#endif
qm = (struct qm_block*)qmp;
#ifdef DBG_QM_MALLOC
list_cntr = 0;
MDBG("qm_malloc(%p, %lu) called from %s: %s(%d)\n",
qm, (unsigned long)size, file, func, line);
#endif
/*malloc(0) should return a valid pointer according to specs*/
if(unlikely(size==0)) size=4;
/*size must be a multiple of 8*/
size=ROUNDUP(size);
if (size>(qm->size-qm->real_used)) return 0;
/*search for a suitable free frag*/
#ifdef DBG_QM_MALLOC
if ((f=qm_find_free(qm, size, &hash, &list_cntr))!=0){
#else
if ((f=qm_find_free(qm, size, &hash))!=0){
#endif
/* we found it!*/
/*detach it from the free list*/
#ifdef DBG_QM_MALLOC
qm_debug_frag(qm, f, file, line);
#endif
qm_detach_free(qm, f);
/*mark it as "busy"*/
f->u.is_free=0;
qm->free_hash[hash].no--;
qm->ffrags--;
/* we ignore split return */
#ifdef DBG_QM_MALLOC
split_frag(qm, f, size, file, "fragm. from qm_malloc", line, mname);
#else
split_frag(qm, f, size);
#endif
qm->real_used+=f->size;
qm->used+=f->size;
if (qm->max_real_used<qm->real_used)
qm->max_real_used=qm->real_used;
#ifdef DBG_QM_MALLOC
f->file=file;
f->func=func;
f->mname=mname;
f->line=line;
f->check=ST_CHECK_PATTERN;
/* FRAG_END(f)->check1=END_CHECK_PATTERN1;
FRAG_END(f)->check2=END_CHECK_PATTERN2;*/
MDBG("qm_malloc(%p, %lu) returns address %p frag. %p (size=%lu) on %d"
" -th hit\n",
qm, (unsigned long)size, (char*)f+sizeof(struct qm_frag), f,
f->size, list_cntr);
#endif
#ifdef MALLOC_STATS
if(qm->type==MEM_TYPE_PKG) {
sr_event_exec(SREV_PKG_UPDATE_STATS, 0);
}
#endif
return (char*)f+sizeof(struct qm_frag);
}
#ifdef DBG_QM_MALLOC
LOG(L_ERR, "qm_malloc(%p, %lu) called from %s: %s(%d), module: %s; Free fragment not found!\n",
qm, (unsigned long)size, file, func, line, mname);
#else
LOG(L_ERR, "qm_malloc(%p, %lu); Free fragment not found!\n",
qm, (unsigned long)size);
#endif
return 0;
}
#ifdef DBG_QM_MALLOC
void qm_free(void* qmp, void* p, const char* file, const char* func,
unsigned int line, const char *mname)
#else
void qm_free(void* qmp, void* p)
#endif
{
struct qm_block* qm;
struct qm_frag* f;
size_t size;
#ifdef MEM_JOIN_FREE
struct qm_frag* next;
struct qm_frag* prev;
#endif /* MEM_JOIN_FREE*/
qm = (struct qm_block*)qmp;
#ifdef DBG_QM_MALLOC
MDBG("qm_free(%p, %p), called from %s: %s(%d)\n", qm, p, file, func, line);
#endif
if (p==0) {
#ifdef DBG_QM_MALLOC
LOG(L_WARN, "WARNING:qm_free: free(0) called from %s: %s(%d)\n", file, func, line);
#else
LOG(L_WARN, "WARNING:qm_free: free(0) called\n");
#endif
return;
}
#ifdef DBG_QM_MALLOC
if (p>(void*)qm->last_frag_end || p<(void*)qm->first_frag){
LOG(L_CRIT, "BUG: qm_free: bad pointer %p (out of memory block!)"
" called from %s: %s(%d) - aborting\n", p, file, func, line);
if(likely(cfg_get(core, core_cfg, mem_safety)==0))
abort();
else return;
}
#endif
f=(struct qm_frag*) ((char*)p-sizeof(struct qm_frag));
#ifdef DBG_QM_MALLOC
qm_debug_frag(qm, f, file, line);
if (f->u.is_free){
LOG(L_CRIT, "BUG: qm_free: freeing already freed pointer (%p),"
" called from %s: %s(%d), first free %s: %s(%ld) - aborting\n",
p, file, func, line, f->file, f->func, f->line);
if(likely(cfg_get(core, core_cfg, mem_safety)==0))
abort();
else return;
}
MDBG("qm_free: freeing frag. %p alloc'ed from %s: %s(%ld)\n",
f, f->file, f->func, f->line);
#endif
if (unlikely(f->u.is_free)){
LM_INFO("freeing a free fragment (%p/%p) - ignore\n",
f, p);
return;
}
size=f->size;
qm->used-=size;
qm->real_used-=size;
#ifdef MEM_JOIN_FREE
if(unlikely(cfg_get(core, core_cfg, mem_join)!=0)) {
next=prev=0;
/* mark this fragment as used (might fall into the middle of joined frags)
to give us an extra chance of detecting a double free call (if the joined
fragment has not yet been reused) */
f->u.nxt_free=(void*)0x1L; /* bogus value, just to mark it as free */
/* join packets if possible*/
next=FRAG_NEXT(f);
if (((char*)next < (char*)qm->last_frag_end) && (next->u.is_free)){
/* join next packet */
#ifdef DBG_QM_MALLOC
qm_debug_frag(qm, next, file, line);
#endif
qm_detach_free(qm, next);
size+=next->size+FRAG_OVERHEAD;
qm->real_used-=FRAG_OVERHEAD;
qm->free_hash[GET_HASH(next->size)].no--; /* FIXME slow */
qm->ffrags--;
}
if (f > qm->first_frag){
prev=FRAG_PREV(f);
/* (struct qm_frag*)((char*)f - (struct qm_frag_end*)((char*)f-
sizeof(struct qm_frag_end))->size);*/
if (prev->u.is_free){
/* join prev packet */
#ifdef DBG_QM_MALLOC
qm_debug_frag(qm, prev, file, line);
#endif
qm_detach_free(qm, prev);
size+=prev->size+FRAG_OVERHEAD;
qm->real_used-=FRAG_OVERHEAD;
qm->free_hash[GET_HASH(prev->size)].no--; /* FIXME slow */
qm->ffrags--;
f=prev;
}
}
f->size=size;
FRAG_END(f)->size=f->size;
} /* if cfg_core->mem_join */
#endif /* MEM_JOIN_FREE*/
#ifdef DBG_QM_MALLOC
f->file=file;
f->func=func;
f->mname=mname;
f->line=line;
#endif
qm_insert_free(qm, f);
#ifdef MALLOC_STATS
if(qm->type==MEM_TYPE_PKG) {
sr_event_exec(SREV_PKG_UPDATE_STATS, 0);
}
#endif
}
#ifdef DBG_QM_MALLOC
void* qm_realloc(void* qmp, void* p, size_t size,
const char* file, const char* func, unsigned int line,
const char *mname)
#else
void* qm_realloc(void* qmp, void* p, size_t size)
#endif
{
struct qm_block* qm;
struct qm_frag* f;
size_t diff;
size_t orig_size;
struct qm_frag* n;
void* ptr;
qm = (struct qm_block*)qmp;
#ifdef DBG_QM_MALLOC
MDBG("qm_realloc(%p, %p, %lu) called from %s: %s(%d)\n",
qm, p, (unsigned long)size,
file, func, line);
if ((p)&&(p>(void*)qm->last_frag_end || p<(void*)qm->first_frag)){
LOG(L_CRIT, "BUG: qm_free: bad pointer %p (out of memory block!) - "
"aborting\n", p);
abort();
}
#endif
if (size==0) {
if (p)
#ifdef DBG_QM_MALLOC
qm_free(qm, p, file, func, line, mname);
#else
qm_free(qm, p);
#endif
return 0;
}
if (p==0)
#ifdef DBG_QM_MALLOC
return qm_malloc(qm, size, file, func, line, mname);
#else
return qm_malloc(qm, size);
#endif
f=(struct qm_frag*) ((char*)p-sizeof(struct qm_frag));
#ifdef DBG_QM_MALLOC
qm_debug_frag(qm, f, file, line);
MDBG("qm_realloc: realloc'ing frag %p alloc'ed from %s: %s(%ld)\n",
f, f->file, f->func, f->line);
if (f->u.is_free){
LOG(L_CRIT, "BUG:qm_realloc: trying to realloc an already freed "
"pointer %p , fragment %p -- aborting\n", p, f);
abort();
}
#endif
/* find first acceptable size */
size=ROUNDUP(size);
if (f->size > size){
orig_size=f->size;
/* shrink */
#ifdef DBG_QM_MALLOC
MDBG("qm_realloc: shrinking from %lu to %lu\n",
f->size, (unsigned long)size);
if(split_frag(qm, f, size, file, "fragm. from qm_realloc", line, mname)!=0){
MDBG("qm_realloc : shrinked successful\n");
#else
if(split_frag(qm, f, size)!=0){
#endif
/* update used sizes: freed the splited frag */
/* split frag already adds FRAG_OVERHEAD for the newly created
free frag, so here we only need orig_size-f->size for real used
*/
qm->real_used-=(orig_size-f->size);
qm->used-=(orig_size-f->size);
}
}else if (f->size < size){
/* grow */
#ifdef DBG_QM_MALLOC
MDBG("qm_realloc: growing from %lu to %lu\n",
f->size, (unsigned long)size);
#endif
orig_size=f->size;
diff=size-f->size;
n=FRAG_NEXT(f);
if (((char*)n < (char*)qm->last_frag_end) &&
(n->u.is_free)&&((n->size+FRAG_OVERHEAD)>=diff)){
/* join */
qm_detach_free(qm, n);
qm->free_hash[GET_HASH(n->size)].no--; /*FIXME: slow*/
qm->ffrags--;
f->size+=n->size+FRAG_OVERHEAD;
qm->real_used-=FRAG_OVERHEAD;
FRAG_END(f)->size=f->size;
/* end checks should be ok */
/* split it if necessary */
if (f->size > size ){
#ifdef DBG_QM_MALLOC
split_frag(qm, f, size, file, "fragm. from qm_realloc",
line, mname);
#else
split_frag(qm, f, size);
#endif
}
qm->real_used+=(f->size-orig_size);
qm->used+=(f->size-orig_size);
}else{
/* could not join => realloc */
#ifdef DBG_QM_MALLOC
ptr=qm_malloc(qm, size, file, func, line, mname);
#else
ptr=qm_malloc(qm, size);
#endif
if (ptr){
/* copy, need by libssl */
memcpy(ptr, p, orig_size);
} else {
#ifdef DBG_QM_MALLOC
LOG(L_ERR, "qm_realloc(%p, %lu) called from %s: %s(%d), module: %s; qm_malloc() failed!\n",
qm, (unsigned long)size, file, func, line, mname);
#else
LOG(L_ERR, "qm_realloc(%p, %lu); qm_malloc() failed!\n",
qm, (unsigned long)size);
#endif
}
#ifdef DBG_QM_MALLOC
qm_free(qm, p, file, func, line, mname);
#else
qm_free(qm, p);
#endif
p=ptr;
}
}else{
/* do nothing */
#ifdef DBG_QM_MALLOC
MDBG("qm_realloc: doing nothing, same size: %lu - %lu\n",
f->size, (unsigned long)size);
#endif
}
#ifdef DBG_QM_MALLOC
MDBG("qm_realloc: returning %p\n", p);
#endif
#ifdef MALLOC_STATS
if(qm->type==MEM_TYPE_PKG) {
sr_event_exec(SREV_PKG_UPDATE_STATS, 0);
}
#endif
return p;
}
void qm_check(struct qm_block* qm)
{
struct qm_frag* f;
long fcount = 0;
int memlog;
memlog=cfg_get(core, core_cfg, memlog);
LOG(memlog, "DEBUG: qm_check()\n");
f = qm->first_frag;
while ((char*)f < (char*)qm->last_frag_end) {
fcount++;
/* check struct qm_frag */
#ifdef DBG_QM_MALLOC
if (f->check!=ST_CHECK_PATTERN){
LOG(L_CRIT, "BUG: qm_*: fragm. %p (address %p) "
"beginning overwritten(%lx)!\n",
f, (char*)f + sizeof(struct qm_frag),
f->check);
qm_status(qm);
abort();
};
#endif
if (f + sizeof(struct qm_frag) + f->size + sizeof(struct qm_frag_end) > qm->first_frag + qm->size) {
LOG(L_CRIT, "BUG: qm_*: fragm. %p (address %p) "
"bad size: %lu (frag end: %p > end of block: %p)\n",
f, (char*)f + sizeof(struct qm_frag) + sizeof(struct qm_frag_end), f->size,
f + sizeof(struct qm_frag) + f->size, qm->first_frag + qm->size);
qm_status(qm);
abort();
}
/* check struct qm_frag_end */
if (FRAG_END(f)->size != f->size) {
LOG(L_CRIT, "BUG: qm_*: fragm. %p (address %p) "
"size in qm_frag and qm_frag_end does not match: frag->size=%lu, frag_end->size=%lu)\n",
f, (char*)f + sizeof(struct qm_frag),
f->size, FRAG_END(f)->size);
qm_status(qm);
abort();
}
#ifdef DBG_QM_MALLOC
if ((FRAG_END(f)->check1 != END_CHECK_PATTERN1) ||
(FRAG_END(f)->check2 != END_CHECK_PATTERN2)) {
LOG(L_CRIT, "BUG: qm_*: fragm. %p (address %p)"
" end overwritten(%lx, %lx)!\n",
f, (char*)f + sizeof(struct qm_frag),
FRAG_END(f)->check1, FRAG_END(f)->check2);
qm_status(qm);
abort();
}
#endif
f = FRAG_NEXT(f);
}
LOG(memlog, "DEBUG: qm_check: %lu fragments OK\n", fcount);
}
void qm_status(void* qmp)
{
struct qm_block* qm;
struct qm_frag* f;
int i,j;
int h;
int unused;
int memlog;
int mem_summary;
qm = (struct qm_block*)qmp;
memlog=cfg_get(core, core_cfg, memlog);
mem_summary=cfg_get(core, core_cfg, mem_summary);
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ", "(%p):\n", qm);
if (!qm) return;
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ", "heap size= %lu\n",
qm->size);
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"used= %lu, used+overhead=%lu, free=%lu\n",
qm->used, qm->real_used, qm->size-qm->real_used);
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"max used (+overhead)= %lu\n", qm->max_real_used);
if (mem_summary & 16) return;
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"dumping all alloc'ed. fragments:\n");
for (f=qm->first_frag, i=0;(char*)f<(char*)qm->last_frag_end;f=FRAG_NEXT(f)
,i++){
if (! f->u.is_free){
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
" %3d. %c address=%p frag=%p size=%lu used=%d\n",
i,
(f->u.is_free)?'a':'N',
(char*)f+sizeof(struct qm_frag), f, f->size, FRAG_WAS_USED(f));
#ifdef DBG_QM_MALLOC
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
" %s from %s: %s(%ld)\n",
(f->u.is_free)?"freed":"alloc'd", f->file, f->func, f->line);
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
" start check=%lx, end check= %lx, %lx\n",
f->check, FRAG_END(f)->check1, FRAG_END(f)->check2);
#endif
}
}
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"dumping free list stats :\n");
for(h=0,i=0;h<QM_HASH_SIZE;h++){
unused=0;
for (f=qm->free_hash[h].head.u.nxt_free,j=0;
f!=&(qm->free_hash[h].head); f=f->u.nxt_free, i++, j++){
if (!FRAG_WAS_USED(f)){
unused++;
#ifdef DBG_QM_MALLOC
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"unused fragm.: hash = %3d, fragment %p,"
" address %p size %lu, created from %s: %s(%lu)\n",
h, f, (char*)f+sizeof(struct qm_frag), f->size,
f->file, f->func, f->line);
#endif
}
}
if (j) LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"hash= %3d. fragments no.: %5d, unused: %5d\n"
"\t\t bucket size: %9lu - %9ld (first %9lu)\n",
h, j, unused, UN_HASH(h),
((h<=QM_MALLOC_OPTIMIZE/ROUNDTO)?1:2)*UN_HASH(h),
qm->free_hash[h].head.u.nxt_free->size
);
if (j!=qm->free_hash[h].no){
LOG(L_CRIT, "BUG: qm_status: different free frag. count: %d!=%lu"
" for hash %3d\n", j, qm->free_hash[h].no, h);
}
}
LOG_(DEFAULT_FACILITY, memlog, "qm_status: ",
"-----------------------------\n");
}
/* fills a malloc info structure with info about the block
* if a parameter is not supported, it will be filled with 0 */
void qm_info(void* qmp, struct mem_info* info)
{
struct qm_block* qm;
qm = (struct qm_block*)qmp;
memset(info,0, sizeof(*info));
info->total_size=qm->size;
info->min_frag=MIN_FRAG_SIZE;
info->free=qm->size-qm->real_used;
info->used=qm->used;
info->real_used=qm->real_used;
info->max_used=qm->max_real_used;
info->total_frags=qm->ffrags;
}
/* returns how much free memory is available
* it never returns an error (unlike fm_available) */
unsigned long qm_available(void* qmp)
{
struct qm_block* qm;
qm = (struct qm_block*)qmp;
return qm->size-qm->real_used;
}
#ifdef DBG_QM_MALLOC
static mem_counter* get_mem_counter(mem_counter **root, struct qm_frag* f)
{
mem_counter *x;
if (!*root) goto make_new;
for(x=*root;x;x=x->next)
if (x->file == f->file && x->func == f->func && x->line == f->line)
return x;
make_new:
x = malloc(sizeof(mem_counter));
x->file = f->file;
x->func = f->func;
x->mname= f->mname;
x->line = f->line;
x->count = 0;
x->size = 0;
x->next = *root;
*root = x;
return x;
}
void qm_sums(void* qmp)
{
struct qm_block* qm;
struct qm_frag* f;
int i;
mem_counter *root, *x;
int memlog;
qm = (struct qm_block*)qmp;
root=0;
if (!qm) return;
memlog=cfg_get(core, core_cfg, memlog);
LOG_(DEFAULT_FACILITY, memlog, "qm_sums: ",
"summarizing all alloc'ed. fragments:\n");
for (f=qm->first_frag, i=0;(char*)f<(char*)qm->last_frag_end;
f=FRAG_NEXT(f),i++){
if (! f->u.is_free){
x = get_mem_counter(&root,f);
x->count++;
x->size+=f->size;
}
}
x = root;
while(x){
LOG_(DEFAULT_FACILITY, memlog, "qm_sums: ",
" count=%6d size=%10lu bytes from %s: %s(%ld)\n",
x->count,x->size,
x->file, x->func, x->line
);
root = x->next;
free(x);
x = root;
}
LOG_(DEFAULT_FACILITY, memlog, "qm_sums: ",
"-----------------------------\n");
}
void qm_mod_get_stats(void *qmp, void **qm_rootp)
{
if (!qm_rootp) {
return ;
}
LM_DBG("get qm memory statistics\n");
struct qm_block *qm = (struct qm_block *) qmp;
mem_counter **qm_root = (mem_counter **) qm_rootp;
struct qm_frag* f;
int i;
mem_counter *x;
if (!qm) return ;
/* update fragment detail list */
for (f=qm->first_frag, i=0; (char*)f<(char*)qm->last_frag_end;
f=FRAG_NEXT(f), i++){
if (! f->u.is_free){
x = get_mem_counter(qm_root,f);
x->count++;
x->size+=f->size;
}
}
return ;
}
void qm_mod_free_stats(void *qm_rootp)
{
if (!qm_rootp) {
return ;
}
LM_DBG("free qm memory statistics\n");
mem_counter *root = (mem_counter *) qm_rootp;
mem_counter *new, *old;
new = root;
old = root;
while (new) {
old = new;
new = new->next;
free(old);
}
}
#else
void qm_sums(void *qmp)
{
return;
}