xmlmemory.c@ 76389

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libxml 2.9.4: fix export
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1	/*
2	* xmlmemory.c: libxml memory allocator wrapper.
3	*
4	* [email protected]
5	*/
6
7	#define IN_LIBXML
8	#include "libxml.h"
9
10	#include <string.h>
11
12	#ifdef HAVE_SYS_TYPES_H
13	#include <sys/types.h>
14	#endif
15
16	#ifdef HAVE_TIME_H
17	#include <time.h>
18	#endif
19
20	#ifdef HAVE_STDLIB_H
21	#include <stdlib.h>
22	#else
23	#ifdef HAVE_MALLOC_H
24	#include <malloc.h>
25	#endif
26	#endif
27
28	#ifdef HAVE_CTYPE_H
29	#include <ctype.h>
30	#endif
31
32	/* #define DEBUG_MEMORY */
33
34	/**
35	* MEM_LIST:
36	*
37	* keep track of all allocated blocks for error reporting
38	* Always build the memory list !
39	*/
40	#ifdef DEBUG_MEMORY_LOCATION
41	#ifndef MEM_LIST
42	#define MEM_LIST /* keep a list of all the allocated memory blocks */
43	#endif
44	#endif
45
46	#include <libxml/globals.h> /* must come before xmlmemory.h */
47	#include <libxml/xmlmemory.h>
48	#include <libxml/xmlerror.h>
49	#include <libxml/threads.h>
50
51	static int xmlMemInitialized = 0;
52	static unsigned long debugMemSize = 0;
53	static unsigned long debugMemBlocks = 0;
54	static unsigned long debugMaxMemSize = 0;
55	static xmlMutexPtr xmlMemMutex = NULL;
56
57	void xmlMallocBreakpoint(void);
58
59	/************************************************************************
60	* *
61	* Macros, variables and associated types *
62	* *
63	************************************************************************/
64
65	#if !defined(LIBXML_THREAD_ENABLED) && !defined(LIBXML_THREAD_ALLOC_ENABLED)
66	#ifdef xmlMalloc
67	#undef xmlMalloc
68	#endif
69	#ifdef xmlRealloc
70	#undef xmlRealloc
71	#endif
72	#ifdef xmlMemStrdup
73	#undef xmlMemStrdup
74	#endif
75	#endif
76
77	/*
78	* Each of the blocks allocated begin with a header containing informations
79	*/
80
81	#define MEMTAG 0x5aa5
82
83	#define MALLOC_TYPE 1
84	#define REALLOC_TYPE 2
85	#define STRDUP_TYPE 3
86	#define MALLOC_ATOMIC_TYPE 4
87	#define REALLOC_ATOMIC_TYPE 5
88
89	typedef struct memnod {
90	unsigned int mh_tag;
91	unsigned int mh_type;
92	unsigned long mh_number;
93	size_t mh_size;
94	#ifdef MEM_LIST
95	struct memnod *mh_next;
96	struct memnod *mh_prev;
97	#endif
98	const char *mh_file;
99	unsigned int mh_line;
100	} MEMHDR;
101
102
103	#ifdef SUN4
104	#define ALIGN_SIZE 16
105	#else
106	#define ALIGN_SIZE sizeof(double)
107	#endif
108	#define HDR_SIZE sizeof(MEMHDR)
109	#define RESERVE_SIZE (((HDR_SIZE + (ALIGN_SIZE-1)) \
110	/ ALIGN_SIZE ) * ALIGN_SIZE)
111
112	#define MAX_SIZE_T ((size_t)-1)
113
114	#define CLIENT_2_HDR(a) ((MEMHDR ) (((char ) (a)) - RESERVE_SIZE))
115	#define HDR_2_CLIENT(a) ((void ) (((char ) (a)) + RESERVE_SIZE))
116
117
118	static unsigned int block=0;
119	static unsigned int xmlMemStopAtBlock = 0;
120	static void *xmlMemTraceBlockAt = NULL;
121	#ifdef MEM_LIST
122	static MEMHDR *memlist = NULL;
123	#endif
124
125	static void debugmem_tag_error(void *addr);
126	#ifdef MEM_LIST
127	static void debugmem_list_add(MEMHDR *);
128	static void debugmem_list_delete(MEMHDR *);
129	#endif
130	#define Mem_Tag_Err(a) debugmem_tag_error(a);
131
132	#ifndef TEST_POINT
133	#define TEST_POINT
134	#endif
135
136	/**
137	* xmlMallocBreakpoint:
138	*
139	* Breakpoint to use in conjunction with xmlMemStopAtBlock. When the block
140	* number reaches the specified value this function is called. One need to add a breakpoint
141	* to it to get the context in which the given block is allocated.
142	*/
143
144	void
145	xmlMallocBreakpoint(void) {
146	xmlGenericError(xmlGenericErrorContext,
147	"xmlMallocBreakpoint reached on block %d\n", xmlMemStopAtBlock);
148	}
149
150	/**
151	* xmlMallocLoc:
152	* @size: an int specifying the size in byte to allocate.
153	* @file: the file name or NULL
154	* @line: the line number
155	*
156	* a malloc() equivalent, with logging of the allocation info.
157	*
158	* Returns a pointer to the allocated area or NULL in case of lack of memory.
159	*/
160
161	void *
162	xmlMallocLoc(size_t size, const char * file, int line)
163	{
164	MEMHDR *p;
165	void *ret;
166
167	if (!xmlMemInitialized) xmlInitMemory();
168	#ifdef DEBUG_MEMORY
169	xmlGenericError(xmlGenericErrorContext,
170	"Malloc(%d)\n",size);
171	#endif
172
173	TEST_POINT
174
175	p = (MEMHDR *) malloc(RESERVE_SIZE+size);
176
177	if (!p) {
178	xmlGenericError(xmlGenericErrorContext,
179	"xmlMallocLoc : Out of free space\n");
180	xmlMemoryDump();
181	return(NULL);
182	}
183	p->mh_tag = MEMTAG;
184	p->mh_size = size;
185	p->mh_type = MALLOC_TYPE;
186	p->mh_file = file;
187	p->mh_line = line;
188	xmlMutexLock(xmlMemMutex);
189	p->mh_number = ++block;
190	debugMemSize += size;
191	debugMemBlocks++;
192	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
193	#ifdef MEM_LIST
194	debugmem_list_add(p);
195	#endif
196	xmlMutexUnlock(xmlMemMutex);
197
198	#ifdef DEBUG_MEMORY
199	xmlGenericError(xmlGenericErrorContext,
200	"Malloc(%d) Ok\n",size);
201	#endif
202
203	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
204
205	ret = HDR_2_CLIENT(p);
206
207	if (xmlMemTraceBlockAt == ret) {
208	xmlGenericError(xmlGenericErrorContext,
209	"%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
210	(long unsigned)size);
211	xmlMallocBreakpoint();
212	}
213
214	TEST_POINT
215
216	return(ret);
217	}
218
219	/**
220	* xmlMallocAtomicLoc:
221	* @size: an unsigned int specifying the size in byte to allocate.
222	* @file: the file name or NULL
223	* @line: the line number
224	*
225	* a malloc() equivalent, with logging of the allocation info.
226	*
227	* Returns a pointer to the allocated area or NULL in case of lack of memory.
228	*/
229
230	void *
231	xmlMallocAtomicLoc(size_t size, const char * file, int line)
232	{
233	MEMHDR *p;
234	void *ret;
235
236	if (!xmlMemInitialized) xmlInitMemory();
237	#ifdef DEBUG_MEMORY
238	xmlGenericError(xmlGenericErrorContext,
239	"Malloc(%d)\n",size);
240	#endif
241
242	TEST_POINT
243
244	if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
245	xmlGenericError(xmlGenericErrorContext,
246	"xmlMallocAtomicLoc : Unsigned overflow prevented\n");
247	xmlMemoryDump();
248	return(NULL);
249	}
250
251	p = (MEMHDR *) malloc(RESERVE_SIZE+size);
252
253	if (!p) {
254	xmlGenericError(xmlGenericErrorContext,
255	"xmlMallocAtomicLoc : Out of free space\n");
256	xmlMemoryDump();
257	return(NULL);
258	}
259	p->mh_tag = MEMTAG;
260	p->mh_size = size;
261	p->mh_type = MALLOC_ATOMIC_TYPE;
262	p->mh_file = file;
263	p->mh_line = line;
264	xmlMutexLock(xmlMemMutex);
265	p->mh_number = ++block;
266	debugMemSize += size;
267	debugMemBlocks++;
268	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
269	#ifdef MEM_LIST
270	debugmem_list_add(p);
271	#endif
272	xmlMutexUnlock(xmlMemMutex);
273
274	#ifdef DEBUG_MEMORY
275	xmlGenericError(xmlGenericErrorContext,
276	"Malloc(%d) Ok\n",size);
277	#endif
278
279	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
280
281	ret = HDR_2_CLIENT(p);
282
283	if (xmlMemTraceBlockAt == ret) {
284	xmlGenericError(xmlGenericErrorContext,
285	"%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
286	(long unsigned)size);
287	xmlMallocBreakpoint();
288	}
289
290	TEST_POINT
291
292	return(ret);
293	}
294	/**
295	* xmlMemMalloc:
296	* @size: an int specifying the size in byte to allocate.
297	*
298	* a malloc() equivalent, with logging of the allocation info.
299	*
300	* Returns a pointer to the allocated area or NULL in case of lack of memory.
301	*/
302
303	void *
304	xmlMemMalloc(size_t size)
305	{
306	return(xmlMallocLoc(size, "none", 0));
307	}
308
309	/**
310	* xmlReallocLoc:
311	* @ptr: the initial memory block pointer
312	* @size: an int specifying the size in byte to allocate.
313	* @file: the file name or NULL
314	* @line: the line number
315	*
316	* a realloc() equivalent, with logging of the allocation info.
317	*
318	* Returns a pointer to the allocated area or NULL in case of lack of memory.
319	*/
320
321	void *
322	xmlReallocLoc(void ptr,size_t size, const char file, int line)
323	{
324	MEMHDR p, tmp;
325	unsigned long number;
326	#ifdef DEBUG_MEMORY
327	size_t oldsize;
328	#endif
329
330	if (ptr == NULL)
331	return(xmlMallocLoc(size, file, line));
332
333	if (!xmlMemInitialized) xmlInitMemory();
334	TEST_POINT
335
336	p = CLIENT_2_HDR(ptr);
337	number = p->mh_number;
338	if (xmlMemStopAtBlock == number) xmlMallocBreakpoint();
339	if (p->mh_tag != MEMTAG) {
340	Mem_Tag_Err(p);
341	goto error;
342	}
343	p->mh_tag = ~MEMTAG;
344	xmlMutexLock(xmlMemMutex);
345	debugMemSize -= p->mh_size;
346	debugMemBlocks--;
347	#ifdef DEBUG_MEMORY
348	oldsize = p->mh_size;
349	#endif
350	#ifdef MEM_LIST
351	debugmem_list_delete(p);
352	#endif
353	xmlMutexUnlock(xmlMemMutex);
354
355	tmp = (MEMHDR *) realloc(p,RESERVE_SIZE+size);
356	if (!tmp) {
357	free(p);
358	goto error;
359	}
360	p = tmp;
361	if (xmlMemTraceBlockAt == ptr) {
362	xmlGenericError(xmlGenericErrorContext,
363	"%p : Realloced(%lu -> %lu) Ok\n",
364	xmlMemTraceBlockAt, (long unsigned)p->mh_size,
365	(long unsigned)size);
366	xmlMallocBreakpoint();
367	}
368	p->mh_tag = MEMTAG;
369	p->mh_number = number;
370	p->mh_type = REALLOC_TYPE;
371	p->mh_size = size;
372	p->mh_file = file;
373	p->mh_line = line;
374	xmlMutexLock(xmlMemMutex);
375	debugMemSize += size;
376	debugMemBlocks++;
377	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
378	#ifdef MEM_LIST
379	debugmem_list_add(p);
380	#endif
381	xmlMutexUnlock(xmlMemMutex);
382
383	TEST_POINT
384
385	#ifdef DEBUG_MEMORY
386	xmlGenericError(xmlGenericErrorContext,
387	"Realloced(%d to %d) Ok\n", oldsize, size);
388	#endif
389	return(HDR_2_CLIENT(p));
390
391	error:
392	return(NULL);
393	}
394
395	/**
396	* xmlMemRealloc:
397	* @ptr: the initial memory block pointer
398	* @size: an int specifying the size in byte to allocate.
399	*
400	* a realloc() equivalent, with logging of the allocation info.
401	*
402	* Returns a pointer to the allocated area or NULL in case of lack of memory.
403	*/
404
405	void *
406	xmlMemRealloc(void *ptr,size_t size) {
407	return(xmlReallocLoc(ptr, size, "none", 0));
408	}
409
410	/**
411	* xmlMemFree:
412	* @ptr: the memory block pointer
413	*
414	* a free() equivalent, with error checking.
415	*/
416	void
417	xmlMemFree(void *ptr)
418	{
419	MEMHDR *p;
420	char *target;
421	#ifdef DEBUG_MEMORY
422	size_t size;
423	#endif
424
425	if (ptr == NULL)
426	return;
427
428	if (ptr == (void *) -1) {
429	xmlGenericError(xmlGenericErrorContext,
430	"trying to free pointer from freed area\n");
431	goto error;
432	}
433
434	if (xmlMemTraceBlockAt == ptr) {
435	xmlGenericError(xmlGenericErrorContext,
436	"%p : Freed()\n", xmlMemTraceBlockAt);
437	xmlMallocBreakpoint();
438	}
439
440	TEST_POINT
441
442	target = (char *) ptr;
443
444	p = CLIENT_2_HDR(ptr);
445	if (p->mh_tag != MEMTAG) {
446	Mem_Tag_Err(p);
447	goto error;
448	}
449	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
450	p->mh_tag = ~MEMTAG;
451	memset(target, -1, p->mh_size);
452	xmlMutexLock(xmlMemMutex);
453	debugMemSize -= p->mh_size;
454	debugMemBlocks--;
455	#ifdef DEBUG_MEMORY
456	size = p->mh_size;
457	#endif
458	#ifdef MEM_LIST
459	debugmem_list_delete(p);
460	#endif
461	xmlMutexUnlock(xmlMemMutex);
462
463	free(p);
464
465	TEST_POINT
466
467	#ifdef DEBUG_MEMORY
468	xmlGenericError(xmlGenericErrorContext,
469	"Freed(%d) Ok\n", size);
470	#endif
471
472	return;
473
474	error:
475	xmlGenericError(xmlGenericErrorContext,
476	"xmlMemFree(%lX) error\n", (unsigned long) ptr);
477	xmlMallocBreakpoint();
478	return;
479	}
480
481	/**
482	* xmlMemStrdupLoc:
483	* @str: the initial string pointer
484	* @file: the file name or NULL
485	* @line: the line number
486	*
487	* a strdup() equivalent, with logging of the allocation info.
488	*
489	* Returns a pointer to the new string or NULL if allocation error occurred.
490	*/
491
492	char *
493	xmlMemStrdupLoc(const char str, const char file, int line)
494	{
495	char *s;
496	size_t size = strlen(str) + 1;
497	MEMHDR *p;
498
499	if (!xmlMemInitialized) xmlInitMemory();
500	TEST_POINT
501
502	p = (MEMHDR *) malloc(RESERVE_SIZE+size);
503	if (!p) {
504	goto error;
505	}
506	p->mh_tag = MEMTAG;
507	p->mh_size = size;
508	p->mh_type = STRDUP_TYPE;
509	p->mh_file = file;
510	p->mh_line = line;
511	xmlMutexLock(xmlMemMutex);
512	p->mh_number = ++block;
513	debugMemSize += size;
514	debugMemBlocks++;
515	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
516	#ifdef MEM_LIST
517	debugmem_list_add(p);
518	#endif
519	xmlMutexUnlock(xmlMemMutex);
520
521	s = (char *) HDR_2_CLIENT(p);
522
523	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
524
525	strcpy(s,str);
526
527	TEST_POINT
528
529	if (xmlMemTraceBlockAt == s) {
530	xmlGenericError(xmlGenericErrorContext,
531	"%p : Strdup() Ok\n", xmlMemTraceBlockAt);
532	xmlMallocBreakpoint();
533	}
534
535	return(s);
536
537	error:
538	return(NULL);
539	}
540
541	/**
542	* xmlMemoryStrdup:
543	* @str: the initial string pointer
544	*
545	* a strdup() equivalent, with logging of the allocation info.
546	*
547	* Returns a pointer to the new string or NULL if allocation error occurred.
548	*/
549
550	char *
551	xmlMemoryStrdup(const char *str) {
552	return(xmlMemStrdupLoc(str, "none", 0));
553	}
554
555	/**
556	* xmlMemUsed:
557	*
558	* Provides the amount of memory currently allocated
559	*
560	* Returns an int representing the amount of memory allocated.
561	*/
562
563	int
564	xmlMemUsed(void) {
565	int res;
566
567	xmlMutexLock(xmlMemMutex);
568	res = debugMemSize;
569	xmlMutexUnlock(xmlMemMutex);
570	return(res);
571	}
572
573	/**
574	* xmlMemBlocks:
575	*
576	* Provides the number of memory areas currently allocated
577	*
578	* Returns an int representing the number of blocks
579	*/
580
581	int
582	xmlMemBlocks(void) {
583	int res;
584
585	xmlMutexLock(xmlMemMutex);
586	res = debugMemBlocks;
587	xmlMutexUnlock(xmlMemMutex);
588	return(res);
589	}
590
591	#ifdef MEM_LIST
592	/**
593	* xmlMemContentShow:
594	* @fp: a FILE descriptor used as the output file
595	* @p: a memory block header
596	*
597	* tries to show some content from the memory block
598	*/
599
600	static void
601	xmlMemContentShow(FILE fp, MEMHDR p)
602	{
603	int i,j,k,len;
604	const char *buf;
605
606	if (p == NULL) {
607	fprintf(fp, " NULL");
608	return;
609	}
610	len = p->mh_size;
611	buf = (const char *) HDR_2_CLIENT(p);
612
613	for (i = 0;i < len;i++) {
614	if (buf[i] == 0) break;
615	if (!isprint((unsigned char) buf[i])) break;
616	}
617	if ((i < 4) && ((buf[i] != 0) \|\| (i == 0))) {
618	if (len >= 4) {
619	MEMHDR *q;
620	void *cur;
621
622	for (j = 0;(j < len -3) && (j < 40);j += 4) {
623	cur = ((void *) &buf[j]);
624	q = CLIENT_2_HDR(cur);
625	p = memlist;
626	k = 0;
627	while (p != NULL) {
628	if (p == q) break;
629	p = p->mh_next;
630	if (k++ > 100) break;
631	}
632	if ((p != NULL) && (p == q)) {
633	fprintf(fp, " pointer to #%lu at index %d",
634	p->mh_number, j);
635	return;
636	}
637	}
638	}
639	} else if ((i == 0) && (buf[i] == 0)) {
640	fprintf(fp," null");
641	} else {
642	if (buf[i] == 0) fprintf(fp," \"%.25s\"", buf);
643	else {
644	fprintf(fp," [");
645	for (j = 0;j < i;j++)
646	fprintf(fp,"%c", buf[j]);
647	fprintf(fp,"]");
648	}
649	}
650	}
651	#endif
652
653	/**
654	* xmlMemDisplayLast:
655	* @fp: a FILE descriptor used as the output file, if NULL, the result is
656	* written to the file .memorylist
657	* @nbBytes: the amount of memory to dump
658	*
659	* the last nbBytes of memory allocated and not freed, useful for dumping
660	* the memory left allocated between two places at runtime.
661	*/
662
663	void
664	xmlMemDisplayLast(FILE *fp, long nbBytes)
665	{
666	#ifdef MEM_LIST
667	MEMHDR *p;
668	unsigned idx;
669	int nb = 0;
670	#endif
671	FILE *old_fp = fp;
672
673	if (nbBytes <= 0)
674	return;
675
676	if (fp == NULL) {
677	fp = fopen(".memorylist", "w");
678	if (fp == NULL)
679	return;
680	}
681
682	#ifdef MEM_LIST
683	fprintf(fp," Last %li MEMORY ALLOCATED : %lu, MAX was %lu\n",
684	nbBytes, debugMemSize, debugMaxMemSize);
685	fprintf(fp,"BLOCK NUMBER SIZE TYPE\n");
686	idx = 0;
687	xmlMutexLock(xmlMemMutex);
688	p = memlist;
689	while ((p) && (nbBytes > 0)) {
690	fprintf(fp,"%-5u %6lu %6lu ",idx++,p->mh_number,
691	(unsigned long)p->mh_size);
692	switch (p->mh_type) {
693	case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
694	case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
695	case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
696	case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
697	case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
698	default:
699	fprintf(fp,"Unknown memory block, may be corrupted");
700	xmlMutexUnlock(xmlMemMutex);
701	if (old_fp == NULL)
702	fclose(fp);
703	return;
704	}
705	if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
706	if (p->mh_tag != MEMTAG)
707	fprintf(fp," INVALID");
708	nb++;
709	if (nb < 100)
710	xmlMemContentShow(fp, p);
711	else
712	fprintf(fp," skip");
713
714	fprintf(fp,"\n");
715	nbBytes -= (unsigned long)p->mh_size;
716	p = p->mh_next;
717	}
718	xmlMutexUnlock(xmlMemMutex);
719	#else
720	fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
721	#endif
722	if (old_fp == NULL)
723	fclose(fp);
724	}
725
726	/**
727	* xmlMemDisplay:
728	* @fp: a FILE descriptor used as the output file, if NULL, the result is
729	* written to the file .memorylist
730	*
731	* show in-extenso the memory blocks allocated
732	*/
733
734	void
735	xmlMemDisplay(FILE *fp)
736	{
737	#ifdef MEM_LIST
738	MEMHDR *p;
739	unsigned idx;
740	int nb = 0;
741	#if defined(HAVE_LOCALTIME) && defined(HAVE_STRFTIME)
742	time_t currentTime;
743	char buf[500];
744	struct tm * tstruct;
745	#endif
746	#endif
747	FILE *old_fp = fp;
748
749	if (fp == NULL) {
750	fp = fopen(".memorylist", "w");
751	if (fp == NULL)
752	return;
753	}
754
755	#ifdef MEM_LIST
756	#if defined(HAVE_LOCALTIME) && defined(HAVE_STRFTIME)
757	currentTime = time(NULL);
758	tstruct = localtime(&currentTime);
759	strftime(buf, sizeof(buf) - 1, "%I:%M:%S %p", tstruct);
760	fprintf(fp," %s\n\n", buf);
761	#endif
762
763
764	fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n",
765	debugMemSize, debugMaxMemSize);
766	fprintf(fp,"BLOCK NUMBER SIZE TYPE\n");
767	idx = 0;
768	xmlMutexLock(xmlMemMutex);
769	p = memlist;
770	while (p) {
771	fprintf(fp,"%-5u %6lu %6lu ",idx++,p->mh_number,
772	(unsigned long)p->mh_size);
773	switch (p->mh_type) {
774	case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
775	case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
776	case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
777	case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
778	case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
779	default:
780	fprintf(fp,"Unknown memory block, may be corrupted");
781	xmlMutexUnlock(xmlMemMutex);
782	if (old_fp == NULL)
783	fclose(fp);
784	return;
785	}
786	if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
787	if (p->mh_tag != MEMTAG)
788	fprintf(fp," INVALID");
789	nb++;
790	if (nb < 100)
791	xmlMemContentShow(fp, p);
792	else
793	fprintf(fp," skip");
794
795	fprintf(fp,"\n");
796	p = p->mh_next;
797	}
798	xmlMutexUnlock(xmlMemMutex);
799	#else
800	fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
801	#endif
802	if (old_fp == NULL)
803	fclose(fp);
804	}
805
806	#ifdef MEM_LIST
807
808	static void debugmem_list_add(MEMHDR *p)
809	{
810	p->mh_next = memlist;
811	p->mh_prev = NULL;
812	if (memlist) memlist->mh_prev = p;
813	memlist = p;
814	#ifdef MEM_LIST_DEBUG
815	if (stderr)
816	Mem_Display(stderr);
817	#endif
818	}
819
820	static void debugmem_list_delete(MEMHDR *p)
821	{
822	if (p->mh_next)
823	p->mh_next->mh_prev = p->mh_prev;
824	if (p->mh_prev)
825	p->mh_prev->mh_next = p->mh_next;
826	else memlist = p->mh_next;
827	#ifdef MEM_LIST_DEBUG
828	if (stderr)
829	Mem_Display(stderr);
830	#endif
831	}
832
833	#endif
834
835	/*
836	* debugmem_tag_error:
837	*
838	* internal error function.
839	*/
840
841	static void debugmem_tag_error(void *p)
842	{
843	xmlGenericError(xmlGenericErrorContext,
844	"Memory tag error occurs :%p \n\t bye\n", p);
845	#ifdef MEM_LIST
846	if (stderr)
847	xmlMemDisplay(stderr);
848	#endif
849	}
850
851	#ifdef MEM_LIST
852	static FILE *xmlMemoryDumpFile = NULL;
853	#endif
854
855	/**
856	* xmlMemShow:
857	* @fp: a FILE descriptor used as the output file
858	* @nr: number of entries to dump
859	*
860	* show a show display of the memory allocated, and dump
861	* the @nr last allocated areas which were not freed
862	*/
863
864	void
865	xmlMemShow(FILE *fp, int nr ATTRIBUTE_UNUSED)
866	{
867	#ifdef MEM_LIST
868	MEMHDR *p;
869	#endif
870
871	if (fp != NULL)
872	fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n",
873	debugMemSize, debugMaxMemSize);
874	#ifdef MEM_LIST
875	xmlMutexLock(xmlMemMutex);
876	if (nr > 0) {
877	fprintf(fp,"NUMBER SIZE TYPE WHERE\n");
878	p = memlist;
879	while ((p) && nr > 0) {
880	fprintf(fp,"%6lu %6lu ",p->mh_number,(unsigned long)p->mh_size);
881	switch (p->mh_type) {
882	case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
883	case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
884	case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
885	case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
886	case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
887	default:fprintf(fp," ??? in ");break;
888	}
889	if (p->mh_file != NULL)
890	fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
891	if (p->mh_tag != MEMTAG)
892	fprintf(fp," INVALID");
893	xmlMemContentShow(fp, p);
894	fprintf(fp,"\n");
895	nr--;
896	p = p->mh_next;
897	}
898	}
899	xmlMutexUnlock(xmlMemMutex);
900	#endif /* MEM_LIST */
901	}
902
903	/**
904	* xmlMemoryDump:
905	*
906	* Dump in-extenso the memory blocks allocated to the file .memorylist
907	*/
908
909	void
910	xmlMemoryDump(void)
911	{
912	#ifdef MEM_LIST
913	FILE *dump;
914
915	if (debugMaxMemSize == 0)
916	return;
917	dump = fopen(".memdump", "w");
918	if (dump == NULL)
919	xmlMemoryDumpFile = stderr;
920	else xmlMemoryDumpFile = dump;
921
922	xmlMemDisplay(xmlMemoryDumpFile);
923
924	if (dump != NULL) fclose(dump);
925	#endif /* MEM_LIST */
926	}
927
928
929	/****************************************************************
930	* *
931	* Initialization Routines *
932	* *
933	****************************************************************/
934
935	/**
936	* xmlInitMemory:
937	*
938	* Initialize the memory layer.
939	*
940	* Returns 0 on success
941	*/
942	int
943	xmlInitMemory(void)
944	{
945	#ifdef HAVE_STDLIB_H
946	char *breakpoint;
947	#endif
948	#ifdef DEBUG_MEMORY
949	xmlGenericError(xmlGenericErrorContext,
950	"xmlInitMemory()\n");
951	#endif
952	/*
953	This is really not good code (see Bug 130419). Suggestions for
954	improvement will be welcome!
955	*/
956	if (xmlMemInitialized) return(-1);
957	xmlMemInitialized = 1;
958	xmlMemMutex = xmlNewMutex();
959
960	#ifdef HAVE_STDLIB_H
961	breakpoint = getenv("XML_MEM_BREAKPOINT");
962	if (breakpoint != NULL) {
963	sscanf(breakpoint, "%ud", &xmlMemStopAtBlock);
964	}
965	#endif
966	#ifdef HAVE_STDLIB_H
967	breakpoint = getenv("XML_MEM_TRACE");
968	if (breakpoint != NULL) {
969	sscanf(breakpoint, "%p", &xmlMemTraceBlockAt);
970	}
971	#endif
972
973	#ifdef DEBUG_MEMORY
974	xmlGenericError(xmlGenericErrorContext,
975	"xmlInitMemory() Ok\n");
976	#endif
977	return(0);
978	}
979
980	/**
981	* xmlCleanupMemory:
982	*
983	* Free up all the memory allocated by the library for its own
984	* use. This should not be called by user level code.
985	*/
986	void
987	xmlCleanupMemory(void) {
988	#ifdef DEBUG_MEMORY
989	xmlGenericError(xmlGenericErrorContext,
990	"xmlCleanupMemory()\n");
991	#endif
992	if (xmlMemInitialized == 0)
993	return;
994
995	xmlFreeMutex(xmlMemMutex);
996	xmlMemMutex = NULL;
997	xmlMemInitialized = 0;
998	#ifdef DEBUG_MEMORY
999	xmlGenericError(xmlGenericErrorContext,
1000	"xmlCleanupMemory() Ok\n");
1001	#endif
1002	}
1003
1004	/**
1005	* xmlMemSetup:
1006	* @freeFunc: the free() function to use
1007	* @mallocFunc: the malloc() function to use
1008	* @reallocFunc: the realloc() function to use
1009	* @strdupFunc: the strdup() function to use
1010	*
1011	* Override the default memory access functions with a new set
1012	* This has to be called before any other libxml routines !
1013	*
1014	* Should this be blocked if there was already some allocations
1015	* done ?
1016	*
1017	* Returns 0 on success
1018	*/
1019	int
1020	xmlMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1021	xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc) {
1022	#ifdef DEBUG_MEMORY
1023	xmlGenericError(xmlGenericErrorContext,
1024	"xmlMemSetup()\n");
1025	#endif
1026	if (freeFunc == NULL)
1027	return(-1);
1028	if (mallocFunc == NULL)
1029	return(-1);
1030	if (reallocFunc == NULL)
1031	return(-1);
1032	if (strdupFunc == NULL)
1033	return(-1);
1034	xmlFree = freeFunc;
1035	xmlMalloc = mallocFunc;
1036	xmlMallocAtomic = mallocFunc;
1037	xmlRealloc = reallocFunc;
1038	xmlMemStrdup = strdupFunc;
1039	#ifdef DEBUG_MEMORY
1040	xmlGenericError(xmlGenericErrorContext,
1041	"xmlMemSetup() Ok\n");
1042	#endif
1043	return(0);
1044	}
1045
1046	/**
1047	* xmlMemGet:
1048	* @freeFunc: place to save the free() function in use
1049	* @mallocFunc: place to save the malloc() function in use
1050	* @reallocFunc: place to save the realloc() function in use
1051	* @strdupFunc: place to save the strdup() function in use
1052	*
1053	* Provides the memory access functions set currently in use
1054	*
1055	* Returns 0 on success
1056	*/
1057	int
1058	xmlMemGet(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1059	xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc) {
1060	if (freeFunc != NULL) *freeFunc = xmlFree;
1061	if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
1062	if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
1063	if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
1064	return(0);
1065	}
1066
1067	/**
1068	* xmlGcMemSetup:
1069	* @freeFunc: the free() function to use
1070	* @mallocFunc: the malloc() function to use
1071	* @mallocAtomicFunc: the malloc() function to use for atomic allocations
1072	* @reallocFunc: the realloc() function to use
1073	* @strdupFunc: the strdup() function to use
1074	*
1075	* Override the default memory access functions with a new set
1076	* This has to be called before any other libxml routines !
1077	* The mallocAtomicFunc is specialized for atomic block
1078	* allocations (i.e. of areas useful for garbage collected memory allocators
1079	*
1080	* Should this be blocked if there was already some allocations
1081	* done ?
1082	*
1083	* Returns 0 on success
1084	*/
1085	int
1086	xmlGcMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1087	xmlMallocFunc mallocAtomicFunc, xmlReallocFunc reallocFunc,
1088	xmlStrdupFunc strdupFunc) {
1089	#ifdef DEBUG_MEMORY
1090	xmlGenericError(xmlGenericErrorContext,
1091	"xmlGcMemSetup()\n");
1092	#endif
1093	if (freeFunc == NULL)
1094	return(-1);
1095	if (mallocFunc == NULL)
1096	return(-1);
1097	if (mallocAtomicFunc == NULL)
1098	return(-1);
1099	if (reallocFunc == NULL)
1100	return(-1);
1101	if (strdupFunc == NULL)
1102	return(-1);
1103	xmlFree = freeFunc;
1104	xmlMalloc = mallocFunc;
1105	xmlMallocAtomic = mallocAtomicFunc;
1106	xmlRealloc = reallocFunc;
1107	xmlMemStrdup = strdupFunc;
1108	#ifdef DEBUG_MEMORY
1109	xmlGenericError(xmlGenericErrorContext,
1110	"xmlGcMemSetup() Ok\n");
1111	#endif
1112	return(0);
1113	}
1114
1115	/**
1116	* xmlGcMemGet:
1117	* @freeFunc: place to save the free() function in use
1118	* @mallocFunc: place to save the malloc() function in use
1119	* @mallocAtomicFunc: place to save the atomic malloc() function in use
1120	* @reallocFunc: place to save the realloc() function in use
1121	* @strdupFunc: place to save the strdup() function in use
1122	*
1123	* Provides the memory access functions set currently in use
1124	* The mallocAtomicFunc is specialized for atomic block
1125	* allocations (i.e. of areas useful for garbage collected memory allocators
1126	*
1127	* Returns 0 on success
1128	*/
1129	int
1130	xmlGcMemGet(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1131	xmlMallocFunc mallocAtomicFunc, xmlReallocFunc reallocFunc,
1132	xmlStrdupFunc *strdupFunc) {
1133	if (freeFunc != NULL) *freeFunc = xmlFree;
1134	if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
1135	if (mallocAtomicFunc != NULL) *mallocAtomicFunc = xmlMallocAtomic;
1136	if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
1137	if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
1138	return(0);
1139	}
1140
1141	#define bottom_xmlmemory
1142	#include "elfgcchack.h"

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source: vbox/trunk/src/libs/libxml2-2.9.4/xmlmemory.c@ 76389

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