xmlmemory.c@ 65675

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upstream fixes post 2.9.2
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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
113	#define CLIENT_2_HDR(a) ((MEMHDR ) (((char ) (a)) - RESERVE_SIZE))
114	#define HDR_2_CLIENT(a) ((void ) (((char ) (a)) + RESERVE_SIZE))
115
116
117	static unsigned int block=0;
118	static unsigned int xmlMemStopAtBlock = 0;
119	static void *xmlMemTraceBlockAt = NULL;
120	#ifdef MEM_LIST
121	static MEMHDR *memlist = NULL;
122	#endif
123
124	static void debugmem_tag_error(void *addr);
125	#ifdef MEM_LIST
126	static void debugmem_list_add(MEMHDR *);
127	static void debugmem_list_delete(MEMHDR *);
128	#endif
129	#define Mem_Tag_Err(a) debugmem_tag_error(a);
130
131	#ifndef TEST_POINT
132	#define TEST_POINT
133	#endif
134
135	/**
136	* xmlMallocBreakpoint:
137	*
138	* Breakpoint to use in conjunction with xmlMemStopAtBlock. When the block
139	* number reaches the specified value this function is called. One need to add a breakpoint
140	* to it to get the context in which the given block is allocated.
141	*/
142
143	void
144	xmlMallocBreakpoint(void) {
145	xmlGenericError(xmlGenericErrorContext,
146	"xmlMallocBreakpoint reached on block %d\n", xmlMemStopAtBlock);
147	}
148
149	/**
150	* xmlMallocLoc:
151	* @size: an int specifying the size in byte to allocate.
152	* @file: the file name or NULL
153	* @line: the line number
154	*
155	* a malloc() equivalent, with logging of the allocation info.
156	*
157	* Returns a pointer to the allocated area or NULL in case of lack of memory.
158	*/
159
160	void *
161	xmlMallocLoc(size_t size, const char * file, int line)
162	{
163	MEMHDR *p;
164	void *ret;
165
166	if (!xmlMemInitialized) xmlInitMemory();
167	#ifdef DEBUG_MEMORY
168	xmlGenericError(xmlGenericErrorContext,
169	"Malloc(%d)\n",size);
170	#endif
171
172	TEST_POINT
173
174	p = (MEMHDR *) malloc(RESERVE_SIZE+size);
175
176	if (!p) {
177	xmlGenericError(xmlGenericErrorContext,
178	"xmlMallocLoc : Out of free space\n");
179	xmlMemoryDump();
180	return(NULL);
181	}
182	p->mh_tag = MEMTAG;
183	p->mh_size = size;
184	p->mh_type = MALLOC_TYPE;
185	p->mh_file = file;
186	p->mh_line = line;
187	xmlMutexLock(xmlMemMutex);
188	p->mh_number = ++block;
189	debugMemSize += size;
190	debugMemBlocks++;
191	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
192	#ifdef MEM_LIST
193	debugmem_list_add(p);
194	#endif
195	xmlMutexUnlock(xmlMemMutex);
196
197	#ifdef DEBUG_MEMORY
198	xmlGenericError(xmlGenericErrorContext,
199	"Malloc(%d) Ok\n",size);
200	#endif
201
202	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
203
204	ret = HDR_2_CLIENT(p);
205
206	if (xmlMemTraceBlockAt == ret) {
207	xmlGenericError(xmlGenericErrorContext,
208	"%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
209	(long unsigned)size);
210	xmlMallocBreakpoint();
211	}
212
213	TEST_POINT
214
215	return(ret);
216	}
217
218	/**
219	* xmlMallocAtomicLoc:
220	* @size: an int specifying the size in byte to allocate.
221	* @file: the file name or NULL
222	* @line: the line number
223	*
224	* a malloc() equivalent, with logging of the allocation info.
225	*
226	* Returns a pointer to the allocated area or NULL in case of lack of memory.
227	*/
228
229	void *
230	xmlMallocAtomicLoc(size_t size, const char * file, int line)
231	{
232	MEMHDR *p;
233	void *ret;
234
235	if (!xmlMemInitialized) xmlInitMemory();
236	#ifdef DEBUG_MEMORY
237	xmlGenericError(xmlGenericErrorContext,
238	"Malloc(%d)\n",size);
239	#endif
240
241	TEST_POINT
242
243	p = (MEMHDR *) malloc(RESERVE_SIZE+size);
244
245	if (!p) {
246	xmlGenericError(xmlGenericErrorContext,
247	"xmlMallocLoc : Out of free space\n");
248	xmlMemoryDump();
249	return(NULL);
250	}
251	p->mh_tag = MEMTAG;
252	p->mh_size = size;
253	p->mh_type = MALLOC_ATOMIC_TYPE;
254	p->mh_file = file;
255	p->mh_line = line;
256	xmlMutexLock(xmlMemMutex);
257	p->mh_number = ++block;
258	debugMemSize += size;
259	debugMemBlocks++;
260	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
261	#ifdef MEM_LIST
262	debugmem_list_add(p);
263	#endif
264	xmlMutexUnlock(xmlMemMutex);
265
266	#ifdef DEBUG_MEMORY
267	xmlGenericError(xmlGenericErrorContext,
268	"Malloc(%d) Ok\n",size);
269	#endif
270
271	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
272
273	ret = HDR_2_CLIENT(p);
274
275	if (xmlMemTraceBlockAt == ret) {
276	xmlGenericError(xmlGenericErrorContext,
277	"%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
278	(long unsigned)size);
279	xmlMallocBreakpoint();
280	}
281
282	TEST_POINT
283
284	return(ret);
285	}
286	/**
287	* xmlMemMalloc:
288	* @size: an int specifying the size in byte to allocate.
289	*
290	* a malloc() equivalent, with logging of the allocation info.
291	*
292	* Returns a pointer to the allocated area or NULL in case of lack of memory.
293	*/
294
295	void *
296	xmlMemMalloc(size_t size)
297	{
298	return(xmlMallocLoc(size, "none", 0));
299	}
300
301	/**
302	* xmlReallocLoc:
303	* @ptr: the initial memory block pointer
304	* @size: an int specifying the size in byte to allocate.
305	* @file: the file name or NULL
306	* @line: the line number
307	*
308	* a realloc() equivalent, with logging of the allocation info.
309	*
310	* Returns a pointer to the allocated area or NULL in case of lack of memory.
311	*/
312
313	void *
314	xmlReallocLoc(void ptr,size_t size, const char file, int line)
315	{
316	MEMHDR p, tmp;
317	unsigned long number;
318	#ifdef DEBUG_MEMORY
319	size_t oldsize;
320	#endif
321
322	if (ptr == NULL)
323	return(xmlMallocLoc(size, file, line));
324
325	if (!xmlMemInitialized) xmlInitMemory();
326	TEST_POINT
327
328	p = CLIENT_2_HDR(ptr);
329	number = p->mh_number;
330	if (xmlMemStopAtBlock == number) xmlMallocBreakpoint();
331	if (p->mh_tag != MEMTAG) {
332	Mem_Tag_Err(p);
333	goto error;
334	}
335	p->mh_tag = ~MEMTAG;
336	xmlMutexLock(xmlMemMutex);
337	debugMemSize -= p->mh_size;
338	debugMemBlocks--;
339	#ifdef DEBUG_MEMORY
340	oldsize = p->mh_size;
341	#endif
342	#ifdef MEM_LIST
343	debugmem_list_delete(p);
344	#endif
345	xmlMutexUnlock(xmlMemMutex);
346
347	tmp = (MEMHDR *) realloc(p,RESERVE_SIZE+size);
348	if (!tmp) {
349	free(p);
350	goto error;
351	}
352	p = tmp;
353	if (xmlMemTraceBlockAt == ptr) {
354	xmlGenericError(xmlGenericErrorContext,
355	"%p : Realloced(%lu -> %lu) Ok\n",
356	xmlMemTraceBlockAt, (long unsigned)p->mh_size,
357	(long unsigned)size);
358	xmlMallocBreakpoint();
359	}
360	p->mh_tag = MEMTAG;
361	p->mh_number = number;
362	p->mh_type = REALLOC_TYPE;
363	p->mh_size = size;
364	p->mh_file = file;
365	p->mh_line = line;
366	xmlMutexLock(xmlMemMutex);
367	debugMemSize += size;
368	debugMemBlocks++;
369	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
370	#ifdef MEM_LIST
371	debugmem_list_add(p);
372	#endif
373	xmlMutexUnlock(xmlMemMutex);
374
375	TEST_POINT
376
377	#ifdef DEBUG_MEMORY
378	xmlGenericError(xmlGenericErrorContext,
379	"Realloced(%d to %d) Ok\n", oldsize, size);
380	#endif
381	return(HDR_2_CLIENT(p));
382
383	error:
384	return(NULL);
385	}
386
387	/**
388	* xmlMemRealloc:
389	* @ptr: the initial memory block pointer
390	* @size: an int specifying the size in byte to allocate.
391	*
392	* a realloc() equivalent, with logging of the allocation info.
393	*
394	* Returns a pointer to the allocated area or NULL in case of lack of memory.
395	*/
396
397	void *
398	xmlMemRealloc(void *ptr,size_t size) {
399	return(xmlReallocLoc(ptr, size, "none", 0));
400	}
401
402	/**
403	* xmlMemFree:
404	* @ptr: the memory block pointer
405	*
406	* a free() equivalent, with error checking.
407	*/
408	void
409	xmlMemFree(void *ptr)
410	{
411	MEMHDR *p;
412	char *target;
413	#ifdef DEBUG_MEMORY
414	size_t size;
415	#endif
416
417	if (ptr == NULL)
418	return;
419
420	if (ptr == (void *) -1) {
421	xmlGenericError(xmlGenericErrorContext,
422	"trying to free pointer from freed area\n");
423	goto error;
424	}
425
426	if (xmlMemTraceBlockAt == ptr) {
427	xmlGenericError(xmlGenericErrorContext,
428	"%p : Freed()\n", xmlMemTraceBlockAt);
429	xmlMallocBreakpoint();
430	}
431
432	TEST_POINT
433
434	target = (char *) ptr;
435
436	p = CLIENT_2_HDR(ptr);
437	if (p->mh_tag != MEMTAG) {
438	Mem_Tag_Err(p);
439	goto error;
440	}
441	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
442	p->mh_tag = ~MEMTAG;
443	memset(target, -1, p->mh_size);
444	xmlMutexLock(xmlMemMutex);
445	debugMemSize -= p->mh_size;
446	debugMemBlocks--;
447	#ifdef DEBUG_MEMORY
448	size = p->mh_size;
449	#endif
450	#ifdef MEM_LIST
451	debugmem_list_delete(p);
452	#endif
453	xmlMutexUnlock(xmlMemMutex);
454
455	free(p);
456
457	TEST_POINT
458
459	#ifdef DEBUG_MEMORY
460	xmlGenericError(xmlGenericErrorContext,
461	"Freed(%d) Ok\n", size);
462	#endif
463
464	return;
465
466	error:
467	xmlGenericError(xmlGenericErrorContext,
468	"xmlMemFree(%lX) error\n", (unsigned long) ptr);
469	xmlMallocBreakpoint();
470	return;
471	}
472
473	/**
474	* xmlMemStrdupLoc:
475	* @str: the initial string pointer
476	* @file: the file name or NULL
477	* @line: the line number
478	*
479	* a strdup() equivalent, with logging of the allocation info.
480	*
481	* Returns a pointer to the new string or NULL if allocation error occurred.
482	*/
483
484	char *
485	xmlMemStrdupLoc(const char str, const char file, int line)
486	{
487	char *s;
488	size_t size = strlen(str) + 1;
489	MEMHDR *p;
490
491	if (!xmlMemInitialized) xmlInitMemory();
492	TEST_POINT
493
494	p = (MEMHDR *) malloc(RESERVE_SIZE+size);
495	if (!p) {
496	goto error;
497	}
498	p->mh_tag = MEMTAG;
499	p->mh_size = size;
500	p->mh_type = STRDUP_TYPE;
501	p->mh_file = file;
502	p->mh_line = line;
503	xmlMutexLock(xmlMemMutex);
504	p->mh_number = ++block;
505	debugMemSize += size;
506	debugMemBlocks++;
507	if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
508	#ifdef MEM_LIST
509	debugmem_list_add(p);
510	#endif
511	xmlMutexUnlock(xmlMemMutex);
512
513	s = (char *) HDR_2_CLIENT(p);
514
515	if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
516
517	strcpy(s,str);
518
519	TEST_POINT
520
521	if (xmlMemTraceBlockAt == s) {
522	xmlGenericError(xmlGenericErrorContext,
523	"%p : Strdup() Ok\n", xmlMemTraceBlockAt);
524	xmlMallocBreakpoint();
525	}
526
527	return(s);
528
529	error:
530	return(NULL);
531	}
532
533	/**
534	* xmlMemoryStrdup:
535	* @str: the initial string pointer
536	*
537	* a strdup() equivalent, with logging of the allocation info.
538	*
539	* Returns a pointer to the new string or NULL if allocation error occurred.
540	*/
541
542	char *
543	xmlMemoryStrdup(const char *str) {
544	return(xmlMemStrdupLoc(str, "none", 0));
545	}
546
547	/**
548	* xmlMemUsed:
549	*
550	* Provides the amount of memory currently allocated
551	*
552	* Returns an int representing the amount of memory allocated.
553	*/
554
555	int
556	xmlMemUsed(void) {
557	int res;
558
559	xmlMutexLock(xmlMemMutex);
560	res = debugMemSize;
561	xmlMutexUnlock(xmlMemMutex);
562	return(res);
563	}
564
565	/**
566	* xmlMemBlocks:
567	*
568	* Provides the number of memory areas currently allocated
569	*
570	* Returns an int representing the number of blocks
571	*/
572
573	int
574	xmlMemBlocks(void) {
575	int res;
576
577	xmlMutexLock(xmlMemMutex);
578	res = debugMemBlocks;
579	xmlMutexUnlock(xmlMemMutex);
580	return(res);
581	}
582
583	#ifdef MEM_LIST
584	/**
585	* xmlMemContentShow:
586	* @fp: a FILE descriptor used as the output file
587	* @p: a memory block header
588	*
589	* tries to show some content from the memory block
590	*/
591
592	static void
593	xmlMemContentShow(FILE fp, MEMHDR p)
594	{
595	int i,j,k,len;
596	const char *buf;
597
598	if (p == NULL) {
599	fprintf(fp, " NULL");
600	return;
601	}
602	len = p->mh_size;
603	buf = (const char *) HDR_2_CLIENT(p);
604
605	for (i = 0;i < len;i++) {
606	if (buf[i] == 0) break;
607	if (!isprint((unsigned char) buf[i])) break;
608	}
609	if ((i < 4) && ((buf[i] != 0) \|\| (i == 0))) {
610	if (len >= 4) {
611	MEMHDR *q;
612	void *cur;
613
614	for (j = 0;(j < len -3) && (j < 40);j += 4) {
615	cur = ((void *) &buf[j]);
616	q = CLIENT_2_HDR(cur);
617	p = memlist;
618	k = 0;
619	while (p != NULL) {
620	if (p == q) break;
621	p = p->mh_next;
622	if (k++ > 100) break;
623	}
624	if ((p != NULL) && (p == q)) {
625	fprintf(fp, " pointer to #%lu at index %d",
626	p->mh_number, j);
627	return;
628	}
629	}
630	}
631	} else if ((i == 0) && (buf[i] == 0)) {
632	fprintf(fp," null");
633	} else {
634	if (buf[i] == 0) fprintf(fp," \"%.25s\"", buf);
635	else {
636	fprintf(fp," [");
637	for (j = 0;j < i;j++)
638	fprintf(fp,"%c", buf[j]);
639	fprintf(fp,"]");
640	}
641	}
642	}
643	#endif
644
645	/**
646	* xmlMemDisplayLast:
647	* @fp: a FILE descriptor used as the output file, if NULL, the result is
648	* written to the file .memorylist
649	* @nbBytes: the amount of memory to dump
650	*
651	* the last nbBytes of memory allocated and not freed, useful for dumping
652	* the memory left allocated between two places at runtime.
653	*/
654
655	void
656	xmlMemDisplayLast(FILE *fp, long nbBytes)
657	{
658	#ifdef MEM_LIST
659	MEMHDR *p;
660	unsigned idx;
661	int nb = 0;
662	#endif
663	FILE *old_fp = fp;
664
665	if (nbBytes <= 0)
666	return;
667
668	if (fp == NULL) {
669	fp = fopen(".memorylist", "w");
670	if (fp == NULL)
671	return;
672	}
673
674	#ifdef MEM_LIST
675	fprintf(fp," Last %li MEMORY ALLOCATED : %lu, MAX was %lu\n",
676	nbBytes, debugMemSize, debugMaxMemSize);
677	fprintf(fp,"BLOCK NUMBER SIZE TYPE\n");
678	idx = 0;
679	xmlMutexLock(xmlMemMutex);
680	p = memlist;
681	while ((p) && (nbBytes > 0)) {
682	fprintf(fp,"%-5u %6lu %6lu ",idx++,p->mh_number,
683	(unsigned long)p->mh_size);
684	switch (p->mh_type) {
685	case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
686	case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
687	case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
688	case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
689	case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
690	default:
691	fprintf(fp,"Unknown memory block, may be corrupted");
692	xmlMutexUnlock(xmlMemMutex);
693	if (old_fp == NULL)
694	fclose(fp);
695	return;
696	}
697	if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
698	if (p->mh_tag != MEMTAG)
699	fprintf(fp," INVALID");
700	nb++;
701	if (nb < 100)
702	xmlMemContentShow(fp, p);
703	else
704	fprintf(fp," skip");
705
706	fprintf(fp,"\n");
707	nbBytes -= (unsigned long)p->mh_size;
708	p = p->mh_next;
709	}
710	xmlMutexUnlock(xmlMemMutex);
711	#else
712	fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
713	#endif
714	if (old_fp == NULL)
715	fclose(fp);
716	}
717
718	/**
719	* xmlMemDisplay:
720	* @fp: a FILE descriptor used as the output file, if NULL, the result is
721	* written to the file .memorylist
722	*
723	* show in-extenso the memory blocks allocated
724	*/
725
726	void
727	xmlMemDisplay(FILE *fp)
728	{
729	#ifdef MEM_LIST
730	MEMHDR *p;
731	unsigned idx;
732	int nb = 0;
733	#if defined(HAVE_LOCALTIME) && defined(HAVE_STRFTIME)
734	time_t currentTime;
735	char buf[500];
736	struct tm * tstruct;
737	#endif
738	#endif
739	FILE *old_fp = fp;
740
741	if (fp == NULL) {
742	fp = fopen(".memorylist", "w");
743	if (fp == NULL)
744	return;
745	}
746
747	#ifdef MEM_LIST
748	#if defined(HAVE_LOCALTIME) && defined(HAVE_STRFTIME)
749	currentTime = time(NULL);
750	tstruct = localtime(&currentTime);
751	strftime(buf, sizeof(buf) - 1, "%I:%M:%S %p", tstruct);
752	fprintf(fp," %s\n\n", buf);
753	#endif
754
755
756	fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n",
757	debugMemSize, debugMaxMemSize);
758	fprintf(fp,"BLOCK NUMBER SIZE TYPE\n");
759	idx = 0;
760	xmlMutexLock(xmlMemMutex);
761	p = memlist;
762	while (p) {
763	fprintf(fp,"%-5u %6lu %6lu ",idx++,p->mh_number,
764	(unsigned long)p->mh_size);
765	switch (p->mh_type) {
766	case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
767	case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
768	case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
769	case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
770	case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
771	default:
772	fprintf(fp,"Unknown memory block, may be corrupted");
773	xmlMutexUnlock(xmlMemMutex);
774	if (old_fp == NULL)
775	fclose(fp);
776	return;
777	}
778	if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
779	if (p->mh_tag != MEMTAG)
780	fprintf(fp," INVALID");
781	nb++;
782	if (nb < 100)
783	xmlMemContentShow(fp, p);
784	else
785	fprintf(fp," skip");
786
787	fprintf(fp,"\n");
788	p = p->mh_next;
789	}
790	xmlMutexUnlock(xmlMemMutex);
791	#else
792	fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
793	#endif
794	if (old_fp == NULL)
795	fclose(fp);
796	}
797
798	#ifdef MEM_LIST
799
800	static void debugmem_list_add(MEMHDR *p)
801	{
802	p->mh_next = memlist;
803	p->mh_prev = NULL;
804	if (memlist) memlist->mh_prev = p;
805	memlist = p;
806	#ifdef MEM_LIST_DEBUG
807	if (stderr)
808	Mem_Display(stderr);
809	#endif
810	}
811
812	static void debugmem_list_delete(MEMHDR *p)
813	{
814	if (p->mh_next)
815	p->mh_next->mh_prev = p->mh_prev;
816	if (p->mh_prev)
817	p->mh_prev->mh_next = p->mh_next;
818	else memlist = p->mh_next;
819	#ifdef MEM_LIST_DEBUG
820	if (stderr)
821	Mem_Display(stderr);
822	#endif
823	}
824
825	#endif
826
827	/*
828	* debugmem_tag_error:
829	*
830	* internal error function.
831	*/
832
833	static void debugmem_tag_error(void *p)
834	{
835	xmlGenericError(xmlGenericErrorContext,
836	"Memory tag error occurs :%p \n\t bye\n", p);
837	#ifdef MEM_LIST
838	if (stderr)
839	xmlMemDisplay(stderr);
840	#endif
841	}
842
843	#ifdef MEM_LIST
844	static FILE *xmlMemoryDumpFile = NULL;
845	#endif
846
847	/**
848	* xmlMemShow:
849	* @fp: a FILE descriptor used as the output file
850	* @nr: number of entries to dump
851	*
852	* show a show display of the memory allocated, and dump
853	* the @nr last allocated areas which were not freed
854	*/
855
856	void
857	xmlMemShow(FILE *fp, int nr ATTRIBUTE_UNUSED)
858	{
859	#ifdef MEM_LIST
860	MEMHDR *p;
861	#endif
862
863	if (fp != NULL)
864	fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n",
865	debugMemSize, debugMaxMemSize);
866	#ifdef MEM_LIST
867	xmlMutexLock(xmlMemMutex);
868	if (nr > 0) {
869	fprintf(fp,"NUMBER SIZE TYPE WHERE\n");
870	p = memlist;
871	while ((p) && nr > 0) {
872	fprintf(fp,"%6lu %6lu ",p->mh_number,(unsigned long)p->mh_size);
873	switch (p->mh_type) {
874	case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
875	case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
876	case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
877	case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
878	case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
879	default:fprintf(fp," ??? in ");break;
880	}
881	if (p->mh_file != NULL)
882	fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
883	if (p->mh_tag != MEMTAG)
884	fprintf(fp," INVALID");
885	xmlMemContentShow(fp, p);
886	fprintf(fp,"\n");
887	nr--;
888	p = p->mh_next;
889	}
890	}
891	xmlMutexUnlock(xmlMemMutex);
892	#endif /* MEM_LIST */
893	}
894
895	/**
896	* xmlMemoryDump:
897	*
898	* Dump in-extenso the memory blocks allocated to the file .memorylist
899	*/
900
901	void
902	xmlMemoryDump(void)
903	{
904	#ifdef MEM_LIST
905	FILE *dump;
906
907	if (debugMaxMemSize == 0)
908	return;
909	dump = fopen(".memdump", "w");
910	if (dump == NULL)
911	xmlMemoryDumpFile = stderr;
912	else xmlMemoryDumpFile = dump;
913
914	xmlMemDisplay(xmlMemoryDumpFile);
915
916	if (dump != NULL) fclose(dump);
917	#endif /* MEM_LIST */
918	}
919
920
921	/****************************************************************
922	* *
923	* Initialization Routines *
924	* *
925	****************************************************************/
926
927	/**
928	* xmlInitMemory:
929	*
930	* Initialize the memory layer.
931	*
932	* Returns 0 on success
933	*/
934	int
935	xmlInitMemory(void)
936	{
937	#ifdef HAVE_STDLIB_H
938	char *breakpoint;
939	#endif
940	#ifdef DEBUG_MEMORY
941	xmlGenericError(xmlGenericErrorContext,
942	"xmlInitMemory()\n");
943	#endif
944	/*
945	This is really not good code (see Bug 130419). Suggestions for
946	improvement will be welcome!
947	*/
948	if (xmlMemInitialized) return(-1);
949	xmlMemInitialized = 1;
950	xmlMemMutex = xmlNewMutex();
951
952	#ifdef HAVE_STDLIB_H
953	breakpoint = getenv("XML_MEM_BREAKPOINT");
954	if (breakpoint != NULL) {
955	sscanf(breakpoint, "%ud", &xmlMemStopAtBlock);
956	}
957	#endif
958	#ifdef HAVE_STDLIB_H
959	breakpoint = getenv("XML_MEM_TRACE");
960	if (breakpoint != NULL) {
961	sscanf(breakpoint, "%p", &xmlMemTraceBlockAt);
962	}
963	#endif
964
965	#ifdef DEBUG_MEMORY
966	xmlGenericError(xmlGenericErrorContext,
967	"xmlInitMemory() Ok\n");
968	#endif
969	return(0);
970	}
971
972	/**
973	* xmlCleanupMemory:
974	*
975	* Free up all the memory allocated by the library for its own
976	* use. This should not be called by user level code.
977	*/
978	void
979	xmlCleanupMemory(void) {
980	#ifdef DEBUG_MEMORY
981	xmlGenericError(xmlGenericErrorContext,
982	"xmlCleanupMemory()\n");
983	#endif
984	if (xmlMemInitialized == 0)
985	return;
986
987	xmlFreeMutex(xmlMemMutex);
988	xmlMemMutex = NULL;
989	xmlMemInitialized = 0;
990	#ifdef DEBUG_MEMORY
991	xmlGenericError(xmlGenericErrorContext,
992	"xmlCleanupMemory() Ok\n");
993	#endif
994	}
995
996	/**
997	* xmlMemSetup:
998	* @freeFunc: the free() function to use
999	* @mallocFunc: the malloc() function to use
1000	* @reallocFunc: the realloc() function to use
1001	* @strdupFunc: the strdup() function to use
1002	*
1003	* Override the default memory access functions with a new set
1004	* This has to be called before any other libxml routines !
1005	*
1006	* Should this be blocked if there was already some allocations
1007	* done ?
1008	*
1009	* Returns 0 on success
1010	*/
1011	int
1012	xmlMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1013	xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc) {
1014	#ifdef DEBUG_MEMORY
1015	xmlGenericError(xmlGenericErrorContext,
1016	"xmlMemSetup()\n");
1017	#endif
1018	if (freeFunc == NULL)
1019	return(-1);
1020	if (mallocFunc == NULL)
1021	return(-1);
1022	if (reallocFunc == NULL)
1023	return(-1);
1024	if (strdupFunc == NULL)
1025	return(-1);
1026	xmlFree = freeFunc;
1027	xmlMalloc = mallocFunc;
1028	xmlMallocAtomic = mallocFunc;
1029	xmlRealloc = reallocFunc;
1030	xmlMemStrdup = strdupFunc;
1031	#ifdef DEBUG_MEMORY
1032	xmlGenericError(xmlGenericErrorContext,
1033	"xmlMemSetup() Ok\n");
1034	#endif
1035	return(0);
1036	}
1037
1038	/**
1039	* xmlMemGet:
1040	* @freeFunc: place to save the free() function in use
1041	* @mallocFunc: place to save the malloc() function in use
1042	* @reallocFunc: place to save the realloc() function in use
1043	* @strdupFunc: place to save the strdup() function in use
1044	*
1045	* Provides the memory access functions set currently in use
1046	*
1047	* Returns 0 on success
1048	*/
1049	int
1050	xmlMemGet(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1051	xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc) {
1052	if (freeFunc != NULL) *freeFunc = xmlFree;
1053	if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
1054	if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
1055	if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
1056	return(0);
1057	}
1058
1059	/**
1060	* xmlGcMemSetup:
1061	* @freeFunc: the free() function to use
1062	* @mallocFunc: the malloc() function to use
1063	* @mallocAtomicFunc: the malloc() function to use for atomic allocations
1064	* @reallocFunc: the realloc() function to use
1065	* @strdupFunc: the strdup() function to use
1066	*
1067	* Override the default memory access functions with a new set
1068	* This has to be called before any other libxml routines !
1069	* The mallocAtomicFunc is specialized for atomic block
1070	* allocations (i.e. of areas useful for garbage collected memory allocators
1071	*
1072	* Should this be blocked if there was already some allocations
1073	* done ?
1074	*
1075	* Returns 0 on success
1076	*/
1077	int
1078	xmlGcMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1079	xmlMallocFunc mallocAtomicFunc, xmlReallocFunc reallocFunc,
1080	xmlStrdupFunc strdupFunc) {
1081	#ifdef DEBUG_MEMORY
1082	xmlGenericError(xmlGenericErrorContext,
1083	"xmlGcMemSetup()\n");
1084	#endif
1085	if (freeFunc == NULL)
1086	return(-1);
1087	if (mallocFunc == NULL)
1088	return(-1);
1089	if (mallocAtomicFunc == NULL)
1090	return(-1);
1091	if (reallocFunc == NULL)
1092	return(-1);
1093	if (strdupFunc == NULL)
1094	return(-1);
1095	xmlFree = freeFunc;
1096	xmlMalloc = mallocFunc;
1097	xmlMallocAtomic = mallocAtomicFunc;
1098	xmlRealloc = reallocFunc;
1099	xmlMemStrdup = strdupFunc;
1100	#ifdef DEBUG_MEMORY
1101	xmlGenericError(xmlGenericErrorContext,
1102	"xmlGcMemSetup() Ok\n");
1103	#endif
1104	return(0);
1105	}
1106
1107	/**
1108	* xmlGcMemGet:
1109	* @freeFunc: place to save the free() function in use
1110	* @mallocFunc: place to save the malloc() function in use
1111	* @mallocAtomicFunc: place to save the atomic malloc() function in use
1112	* @reallocFunc: place to save the realloc() function in use
1113	* @strdupFunc: place to save the strdup() function in use
1114	*
1115	* Provides the memory access functions set currently in use
1116	* The mallocAtomicFunc is specialized for atomic block
1117	* allocations (i.e. of areas useful for garbage collected memory allocators
1118	*
1119	* Returns 0 on success
1120	*/
1121	int
1122	xmlGcMemGet(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
1123	xmlMallocFunc mallocAtomicFunc, xmlReallocFunc reallocFunc,
1124	xmlStrdupFunc *strdupFunc) {
1125	if (freeFunc != NULL) *freeFunc = xmlFree;
1126	if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
1127	if (mallocAtomicFunc != NULL) *mallocAtomicFunc = xmlMallocAtomic;
1128	if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
1129	if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
1130	return(0);
1131	}
1132
1133	#define bottom_xmlmemory
1134	#include "elfgcchack.h"

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source: vbox/trunk/src/libs/libxml2-2.9.2/xmlmemory.c@ 65675

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