xmlmemory.h File Reference

#include <stdio.h>
#include <libxml/xmlversion.h>
#include <libxml/threads.h>
#include <libxml/globals.h>

Include dependency graph for xmlmemory.h:

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Typedefs
typedef void(XMLCALL *	xmlFreeFunc) (void *mem)
typedef void *	LIBXML_ATTR_ALLOC_SIZE(1) XMLCALL *xmlMallocFunc) (size_t size)
typedef void *(XMLCALL *	xmlReallocFunc) (void *mem, size_t size)
typedef char *(XMLCALL *	xmlStrdupFunc) (const char *str)

Functions
XMLPUBFUN int XMLCALL	xmlMemSetup (xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc, xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc)
XMLPUBFUN int XMLCALL	xmlMemGet (xmlFreeFunc *freeFunc, xmlMallocFunc *mallocFunc, xmlReallocFunc *reallocFunc, xmlStrdupFunc *strdupFunc)
XMLPUBFUN int XMLCALL	xmlGcMemSetup (xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc, xmlMallocFunc mallocAtomicFunc, xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc)
XMLPUBFUN int XMLCALL	xmlGcMemGet (xmlFreeFunc *freeFunc, xmlMallocFunc *mallocFunc, xmlMallocFunc *mallocAtomicFunc, xmlReallocFunc *reallocFunc, xmlStrdupFunc *strdupFunc)
XML_DEPRECATED XMLPUBFUN int XMLCALL	xmlInitMemory (void)
XML_DEPRECATED XMLPUBFUN void XMLCALL	xmlCleanupMemory (void)
XMLPUBFUN int XMLCALL	xmlMemUsed (void)
XMLPUBFUN int XMLCALL	xmlMemBlocks (void)
XMLPUBFUN void XMLCALL	xmlMemDisplay (FILE *fp)
XMLPUBFUN void XMLCALL	xmlMemDisplayLast (FILE *fp, long nbBytes)
XMLPUBFUN void XMLCALL	xmlMemShow (FILE *fp, int nr)
XMLPUBFUN void XMLCALL	xmlMemoryDump (void)
XMLPUBFUN void *XMLCALL	xmlMemMalloc (size_t size) LIBXML_ATTR_ALLOC_SIZE(1)
XMLPUBFUN void *XMLCALL	xmlMemRealloc (void *ptr, size_t size)
XMLPUBFUN void XMLCALL	xmlMemFree (void *ptr)
XMLPUBFUN char *XMLCALL	xmlMemoryStrdup (const char *str)
XMLPUBFUN void *XMLCALL	xmlMallocLoc (size_t size, const char *file, int line) LIBXML_ATTR_ALLOC_SIZE(1)
XMLPUBFUN void *XMLCALL	xmlReallocLoc (void *ptr, size_t size, const char *file, int line)
XMLPUBFUN void *XMLCALL	xmlMallocAtomicLoc (size_t size, const char *file, int line) LIBXML_ATTR_ALLOC_SIZE(1)
XMLPUBFUN char *XMLCALL	xmlMemStrdupLoc (const char *str, const char *file, int line)

Typedef Documentation

LIBXML_ATTR_ALLOC_SIZE

typedef void * LIBXML_ATTR_ALLOC_SIZE(1) XMLCALL *xmlMallocFunc)(size_t size)

xmlMallocFunc: @size: the size requested in bytes

Signature for a malloc() implementation.

Returns a pointer to the newly allocated block or NULL in case of error.

Definition at line 66 of file xmlmemory.h.

xmlFreeFunc

typedef void(XMLCALL * xmlFreeFunc) (void *mem)

DEBUG_MEMORY:

DEBUG_MEMORY replaces the allocator with a collect and debug shell to the libc allocator. DEBUG_MEMORY should only be activated when debugging libxml i.e. if libxml has been configured with –with-debug-mem too. DEBUG_MEMORY_LOCATION:

DEBUG_MEMORY_LOCATION should be activated only when debugging libxml i.e. if libxml has been configured with –with-debug-mem too. xmlFreeFunc: @mem: an already allocated block of memory

Signature for a free() implementation.

Definition at line 57 of file xmlmemory.h.

xmlReallocFunc

typedef void *(XMLCALL * xmlReallocFunc) (void *mem, size_t size)

xmlReallocFunc: @mem: an already allocated block of memory @size: the new size requested in bytes

Signature for a realloc() implementation.

Returns a pointer to the newly reallocated block or NULL in case of error.

Definition at line 77 of file xmlmemory.h.

xmlStrdupFunc

typedef char *(XMLCALL * xmlStrdupFunc) (const char *str)

xmlStrdupFunc: @str: a zero terminated string

Signature for an strdup() implementation.

Returns the copy of the string or NULL in case of error.

Definition at line 87 of file xmlmemory.h.

Function Documentation

xmlCleanupMemory()

XML_DEPRECATED XMLPUBFUN void XMLCALL xmlCleanupMemory

(

void

)

xmlCleanupMemory:

DEPRECATED: This function will be made private. Call xmlCleanupParser to free global state but see the warnings there. xmlCleanupParser should be only called once at program exit. In most cases, you don't have call cleanup functions at all.

Free up all the memory allocated by the library for its own use. This should not be called by user level code.

Definition at line 989 of file xmlmemory.c.

                       {
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlCleanupMemory()\n");
#endif
    if (xmlMemInitialized == 0)
        return;
 
    xmlFreeMutex(xmlMemMutex);
    xmlMemMutex = NULL;
    xmlMemInitialized = 0;
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlCleanupMemory() Ok\n");
#endif
}

Referenced by xmlCleanupParser().

xmlGcMemGet()

XMLPUBFUN int XMLCALL xmlGcMemGet	(	xmlFreeFunc *	freeFunc,
		xmlMallocFunc *	mallocFunc,
		xmlMallocFunc *	mallocAtomicFunc,
		xmlReallocFunc *	reallocFunc,
		xmlStrdupFunc *	strdupFunc
	)

xmlGcMemGet: @freeFunc: place to save the free() function in use @mallocFunc: place to save the malloc() function in use @mallocAtomicFunc: place to save the atomic malloc() function in use @reallocFunc: place to save the realloc() function in use @strdupFunc: place to save the strdup() function in use

Provides the memory access functions set currently in use The mallocAtomicFunc is specialized for atomic block allocations (i.e. of areas useful for garbage collected memory allocators

Returns 0 on success

Definition at line 1132 of file xmlmemory.c.

                                   {
    if (freeFunc != NULL) *freeFunc = xmlFree;
    if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
    if (mallocAtomicFunc != NULL) *mallocAtomicFunc = xmlMallocAtomic;
    if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
    if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
    return(0);
}

xmlGcMemSetup()

XMLPUBFUN int XMLCALL xmlGcMemSetup	(	xmlFreeFunc	freeFunc,
		xmlMallocFunc	mallocFunc,
		xmlMallocFunc	mallocAtomicFunc,
		xmlReallocFunc	reallocFunc,
		xmlStrdupFunc	strdupFunc
	)

xmlGcMemSetup: @freeFunc: the free() function to use @mallocFunc: the malloc() function to use @mallocAtomicFunc: the malloc() function to use for atomic allocations @reallocFunc: the realloc() function to use @strdupFunc: the strdup() function to use

Override the default memory access functions with a new set This has to be called before any other libxml routines ! The mallocAtomicFunc is specialized for atomic block allocations (i.e. of areas useful for garbage collected memory allocators

Should this be blocked if there was already some allocations done ?

Returns 0 on success

Definition at line 1088 of file xmlmemory.c.

                                    {
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlGcMemSetup()\n");
#endif
    if (freeFunc == NULL)
    return(-1);
    if (mallocFunc == NULL)
    return(-1);
    if (mallocAtomicFunc == NULL)
    return(-1);
    if (reallocFunc == NULL)
    return(-1);
    if (strdupFunc == NULL)
    return(-1);
    xmlFree = freeFunc;
    xmlMalloc = mallocFunc;
    xmlMallocAtomic = mallocAtomicFunc;
    xmlRealloc = reallocFunc;
    xmlMemStrdup = strdupFunc;
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlGcMemSetup() Ok\n");
#endif
    return(0);
}

xmlInitMemory()

XML_DEPRECATED XMLPUBFUN int XMLCALL xmlInitMemory

(

void

)

xmlInitMemory:

DEPRECATED: This function will be made private. Call xmlInitParser to initialize the library.

Initialize the memory layer.

Returns 0 on success

Definition at line 946 of file xmlmemory.c.

{
     char *breakpoint;
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlInitMemory()\n");
#endif
    /*
     This is really not good code (see Bug 130419).  Suggestions for
     improvement will be welcome!
    */
     if (xmlMemInitialized) return(-1);
     xmlMemInitialized = 1;
     xmlMemMutex = xmlNewMutex();
 
     breakpoint = getenv("XML_MEM_BREAKPOINT");
     if (breakpoint != NULL) {
         sscanf(breakpoint, "%ud", &xmlMemStopAtBlock);
     }
     breakpoint = getenv("XML_MEM_TRACE");
     if (breakpoint != NULL) {
         sscanf(breakpoint, "%p", &xmlMemTraceBlockAt);
     }
 
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlInitMemory() Ok\n");
#endif
     return(0);
}

Referenced by xmlInitParser(), xmlMallocAtomicLoc(), xmlMallocLoc(), xmlMemStrdupLoc(), and xmlReallocLoc().

xmlMallocAtomicLoc()

XMLPUBFUN void *XMLCALL xmlMallocAtomicLoc	(	size_t	size,
		const char *	file,
		int	line
	)

Definition at line 221 of file xmlmemory.c.

{
    MEMHDR *p;
    void *ret;
 
    if (!xmlMemInitialized) xmlInitMemory();
#ifdef DEBUG_MEMORY
    xmlGenericError(xmlGenericErrorContext,
        "Malloc(%d)\n",size);
#endif
 
    TEST_POINT
 
    if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
    xmlGenericError(xmlGenericErrorContext,
        "xmlMallocAtomicLoc : Unsigned overflow\n");
    xmlMemoryDump();
    return(NULL);
    }
 
    p = (MEMHDR *) malloc(RESERVE_SIZE+size);
 
    if (!p) {
    xmlGenericError(xmlGenericErrorContext,
        "xmlMallocAtomicLoc : Out of free space\n");
    xmlMemoryDump();
    return(NULL);
    }
    p->mh_tag = MEMTAG;
    p->mh_size = size;
    p->mh_type = MALLOC_ATOMIC_TYPE;
    p->mh_file = file;
    p->mh_line = line;
    xmlMutexLock(xmlMemMutex);
    p->mh_number = ++block;
    debugMemSize += size;
    debugMemBlocks++;
    if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
    debugmem_list_add(p);
#endif
    xmlMutexUnlock(xmlMemMutex);
 
#ifdef DEBUG_MEMORY
    xmlGenericError(xmlGenericErrorContext,
        "Malloc(%d) Ok\n",size);
#endif
 
    if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
 
    ret = HDR_2_CLIENT(p);
 
    if (xmlMemTraceBlockAt == ret) {
    xmlGenericError(xmlGenericErrorContext,
            "%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
            (long unsigned)size);
    xmlMallocBreakpoint();
    }
 
    TEST_POINT
 
    return(ret);
}

xmlMallocLoc()

XMLPUBFUN void *XMLCALL xmlMallocLoc	(	size_t	size,
		const char *	file,
		int	line
	)

Definition at line 145 of file xmlmemory.c.

{
    MEMHDR *p;
    void *ret;
 
    if (!xmlMemInitialized) xmlInitMemory();
#ifdef DEBUG_MEMORY
    xmlGenericError(xmlGenericErrorContext,
        "Malloc(%d)\n",size);
#endif
 
    TEST_POINT
 
    if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
    xmlGenericError(xmlGenericErrorContext,
        "xmlMallocLoc : Unsigned overflow\n");
    xmlMemoryDump();
    return(NULL);
    }
 
    p = (MEMHDR *) malloc(RESERVE_SIZE+size);
 
    if (!p) {
    xmlGenericError(xmlGenericErrorContext,
        "xmlMallocLoc : Out of free space\n");
    xmlMemoryDump();
    return(NULL);
    }
    p->mh_tag = MEMTAG;
    p->mh_size = size;
    p->mh_type = MALLOC_TYPE;
    p->mh_file = file;
    p->mh_line = line;
    xmlMutexLock(xmlMemMutex);
    p->mh_number = ++block;
    debugMemSize += size;
    debugMemBlocks++;
    if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
    debugmem_list_add(p);
#endif
    xmlMutexUnlock(xmlMemMutex);
 
#ifdef DEBUG_MEMORY
    xmlGenericError(xmlGenericErrorContext,
        "Malloc(%d) Ok\n",size);
#endif
 
    if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
 
    ret = HDR_2_CLIENT(p);
 
    if (xmlMemTraceBlockAt == ret) {
    xmlGenericError(xmlGenericErrorContext,
            "%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
            (long unsigned)size);
    xmlMallocBreakpoint();
    }
 
    TEST_POINT
 
    return(ret);
}

Referenced by xmlMemMalloc(), and xmlReallocLoc().

xmlMemBlocks()

XMLPUBFUN int XMLCALL xmlMemBlocks

(

void

)

xmlMemBlocks:

Provides the number of memory areas currently allocated

Returns an int representing the number of blocks

Definition at line 586 of file xmlmemory.c.

                   {
    int res;
 
    xmlMutexLock(xmlMemMutex);
    res = debugMemBlocks;
    xmlMutexUnlock(xmlMemMutex);
    return(res);
}

xmlMemDisplay()

XMLPUBFUN void XMLCALL xmlMemDisplay

(

FILE *

fp

)

xmlMemDisplay: @fp: a FILE descriptor used as the output file, if NULL, the result is written to the file .memorylist

show in-extenso the memory blocks allocated

Definition at line 739 of file xmlmemory.c.

{
#ifdef MEM_LIST
    MEMHDR *p;
    unsigned idx;
    int     nb = 0;
    time_t currentTime;
    char buf[500];
    struct tm * tstruct;
#endif
    FILE *old_fp = fp;
 
    if (fp == NULL) {
    fp = fopen(".memorylist", "w");
    if (fp == NULL)
        return;
    }
 
#ifdef MEM_LIST
    currentTime = time(NULL);
    tstruct = localtime(&currentTime);
    strftime(buf, sizeof(buf) - 1, "%I:%M:%S %p", tstruct);
    fprintf(fp,"      %s\n\n", buf);
 
 
    fprintf(fp,"      MEMORY ALLOCATED : %lu, MAX was %lu\n",
            debugMemSize, debugMaxMemSize);
    fprintf(fp,"BLOCK  NUMBER   SIZE  TYPE\n");
    idx = 0;
    xmlMutexLock(xmlMemMutex);
    p = memlist;
    while (p) {
      fprintf(fp,"%-5u  %6lu %6lu ",idx++,p->mh_number,
          (unsigned long)p->mh_size);
        switch (p->mh_type) {
           case STRDUP_TYPE:fprintf(fp,"strdup()  in ");break;
           case MALLOC_TYPE:fprintf(fp,"malloc()  in ");break;
           case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
           case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc()  in ");break;
           case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
           default:
            fprintf(fp,"Unknown memory block, may be corrupted");
        xmlMutexUnlock(xmlMemMutex);
        if (old_fp == NULL)
            fclose(fp);
        return;
        }
    if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
        if (p->mh_tag != MEMTAG)
          fprintf(fp,"  INVALID");
        nb++;
    if (nb < 100)
        xmlMemContentShow(fp, p);
    else
        fprintf(fp," skip");
 
        fprintf(fp,"\n");
        p = p->mh_next;
    }
    xmlMutexUnlock(xmlMemMutex);
#else
    fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
#endif
    if (old_fp == NULL)
    fclose(fp);
}

Referenced by debugmem_tag_error(), and xmlMemoryDump().

xmlMemDisplayLast()

XMLPUBFUN void XMLCALL xmlMemDisplayLast	(	FILE *	fp,
		long	nbBytes
	)

xmlMemDisplayLast: @fp: a FILE descriptor used as the output file, if NULL, the result is written to the file .memorylist @nbBytes: the amount of memory to dump

the last nbBytes of memory allocated and not freed, useful for dumping the memory left allocated between two places at runtime.

Definition at line 668 of file xmlmemory.c.

{
#ifdef MEM_LIST
    MEMHDR *p;
    unsigned idx;
    int     nb = 0;
#endif
    FILE *old_fp = fp;
 
    if (nbBytes <= 0)
        return;
 
    if (fp == NULL) {
    fp = fopen(".memorylist", "w");
    if (fp == NULL)
        return;
    }
 
#ifdef MEM_LIST
    fprintf(fp,"   Last %li MEMORY ALLOCATED : %lu, MAX was %lu\n",
            nbBytes, debugMemSize, debugMaxMemSize);
    fprintf(fp,"BLOCK  NUMBER   SIZE  TYPE\n");
    idx = 0;
    xmlMutexLock(xmlMemMutex);
    p = memlist;
    while ((p) && (nbBytes > 0)) {
      fprintf(fp,"%-5u  %6lu %6lu ",idx++,p->mh_number,
          (unsigned long)p->mh_size);
        switch (p->mh_type) {
           case STRDUP_TYPE:fprintf(fp,"strdup()  in ");break;
           case MALLOC_TYPE:fprintf(fp,"malloc()  in ");break;
           case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
           case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc()  in ");break;
           case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
           default:
            fprintf(fp,"Unknown memory block, may be corrupted");
        xmlMutexUnlock(xmlMemMutex);
        if (old_fp == NULL)
            fclose(fp);
        return;
        }
    if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
        if (p->mh_tag != MEMTAG)
          fprintf(fp,"  INVALID");
        nb++;
    if (nb < 100)
        xmlMemContentShow(fp, p);
    else
        fprintf(fp," skip");
 
        fprintf(fp,"\n");
    nbBytes -= (unsigned long)p->mh_size;
        p = p->mh_next;
    }
    xmlMutexUnlock(xmlMemMutex);
#else
    fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
#endif
    if (old_fp == NULL)
    fclose(fp);
}

xmlMemFree()

XMLPUBFUN void XMLCALL xmlMemFree

(

void *

ptr

)

xmlMemFree: @ptr: the memory block pointer

a free() equivalent, with error checking.

Definition at line 414 of file xmlmemory.c.

{
    MEMHDR *p;
    char *target;
#ifdef DEBUG_MEMORY
    size_t size;
#endif
 
    if (ptr == NULL)
    return;
 
    if (ptr == (void *) -1) {
    xmlGenericError(xmlGenericErrorContext,
        "trying to free pointer from freed area\n");
        goto error;
    }
 
    if (xmlMemTraceBlockAt == ptr) {
    xmlGenericError(xmlGenericErrorContext,
            "%p : Freed()\n", xmlMemTraceBlockAt);
    xmlMallocBreakpoint();
    }
 
    TEST_POINT
 
    target = (char *) ptr;
 
    p = CLIENT_2_HDR(ptr);
    if (p->mh_tag != MEMTAG) {
        Mem_Tag_Err(p);
        goto error;
    }
    if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
    p->mh_tag = ~MEMTAG;
    memset(target, -1, p->mh_size);
    xmlMutexLock(xmlMemMutex);
    debugMemSize -= p->mh_size;
    debugMemBlocks--;
#ifdef DEBUG_MEMORY
    size = p->mh_size;
#endif
#ifdef MEM_LIST
    debugmem_list_delete(p);
#endif
    xmlMutexUnlock(xmlMemMutex);
 
    free(p);
 
    TEST_POINT
 
#ifdef DEBUG_MEMORY
    xmlGenericError(xmlGenericErrorContext,
        "Freed(%d) Ok\n", size);
#endif
 
    return;
 
error:
    xmlGenericError(xmlGenericErrorContext,
        "xmlMemFree(%p) error\n", ptr);
    xmlMallocBreakpoint();
    return;
}

Referenced by myFreeFunc(), myMallocFunc(), myReallocFunc(), and xmlInitializeGlobalState().

xmlMemGet()

XMLPUBFUN int XMLCALL xmlMemGet	(	xmlFreeFunc *	freeFunc,
		xmlMallocFunc *	mallocFunc,
		xmlReallocFunc *	reallocFunc,
		xmlStrdupFunc *	strdupFunc
	)

xmlMemGet: @freeFunc: place to save the free() function in use @mallocFunc: place to save the malloc() function in use @reallocFunc: place to save the realloc() function in use @strdupFunc: place to save the strdup() function in use

Provides the memory access functions set currently in use

Returns 0 on success

Definition at line 1060 of file xmlmemory.c.

                                                              {
    if (freeFunc != NULL) *freeFunc = xmlFree;
    if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
    if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
    if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
    return(0);
}

xmlMemMalloc()

XMLPUBFUN void *XMLCALL xmlMemMalloc

(

size_t

size

)

xmlMemMalloc: @size: an int specifying the size in byte to allocate.

a malloc() equivalent, with logging of the allocation info.

Returns a pointer to the allocated area or NULL in case of lack of memory.

Definition at line 294 of file xmlmemory.c.

{
    return(xmlMallocLoc(size, "none", 0));
}

Referenced by myMallocFunc(), and xmlInitializeGlobalState().

xmlMemoryDump()

XMLPUBFUN void XMLCALL xmlMemoryDump

(

void

)

xmlMemoryDump:

Dump in-extenso the memory blocks allocated to the file .memorylist

Definition at line 910 of file xmlmemory.c.

{
#ifdef MEM_LIST
    FILE *dump;
 
    if (debugMaxMemSize == 0)
    return;
    dump = fopen(".memdump", "w");
    if (dump == NULL)
    xmlMemoryDumpFile = stderr;
    else xmlMemoryDumpFile = dump;
 
    xmlMemDisplay(xmlMemoryDumpFile);
 
    if (dump != NULL) fclose(dump);
#endif /* MEM_LIST */
}

Referenced by main(), xmlMallocAtomicLoc(), xmlMallocLoc(), xmlMemStrdupLoc(), and xmlReallocLoc().

xmlMemoryStrdup()

XMLPUBFUN char *XMLCALL xmlMemoryStrdup

(

const char *

str

)

xmlMemoryStrdup: @str: the initial string pointer

a strdup() equivalent, with logging of the allocation info.

Returns a pointer to the new string or NULL if allocation error occurred.

Definition at line 555 of file xmlmemory.c.

                                 {
    return(xmlMemStrdupLoc(str, "none", 0));
}

Referenced by myStrdupFunc(), and xmlInitializeGlobalState().

xmlMemRealloc()

XMLPUBFUN void *XMLCALL xmlMemRealloc	(	void *	ptr,
		size_t	size
	)

xmlMemRealloc: @ptr: the initial memory block pointer @size: an int specifying the size in byte to allocate.

a realloc() equivalent, with logging of the allocation info.

Returns a pointer to the allocated area or NULL in case of lack of memory.

Definition at line 403 of file xmlmemory.c.

                                     {
    return(xmlReallocLoc(ptr, size, "none", 0));
}

Referenced by myReallocFunc(), and xmlInitializeGlobalState().

xmlMemSetup()

XMLPUBFUN int XMLCALL xmlMemSetup	(	xmlFreeFunc	freeFunc,
		xmlMallocFunc	mallocFunc,
		xmlReallocFunc	reallocFunc,
		xmlStrdupFunc	strdupFunc
	)

xmlMemSetup: @freeFunc: the free() function to use @mallocFunc: the malloc() function to use @reallocFunc: the realloc() function to use @strdupFunc: the strdup() function to use

Override the default memory access functions with a new set This has to be called before any other libxml routines !

Should this be blocked if there was already some allocations done ?

Returns 0 on success

Definition at line 1022 of file xmlmemory.c.

                                                                  {
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlMemSetup()\n");
#endif
    if (freeFunc == NULL)
    return(-1);
    if (mallocFunc == NULL)
    return(-1);
    if (reallocFunc == NULL)
    return(-1);
    if (strdupFunc == NULL)
    return(-1);
    xmlFree = freeFunc;
    xmlMalloc = mallocFunc;
    xmlMallocAtomic = mallocFunc;
    xmlRealloc = reallocFunc;
    xmlMemStrdup = strdupFunc;
#ifdef DEBUG_MEMORY
     xmlGenericError(xmlGenericErrorContext,
         "xmlMemSetup() Ok\n");
#endif
    return(0);
}

Referenced by main().

xmlMemShow()

XMLPUBFUN void XMLCALL xmlMemShow	(	FILE *	fp,
		int nr	ATTRIBUTE_UNUSED
	)

xmlMemShow: @fp: a FILE descriptor used as the output file @nr: number of entries to dump

show a show display of the memory allocated, and dump the @nr last allocated areas which were not freed

Definition at line 865 of file xmlmemory.c.

{
#ifdef MEM_LIST
    MEMHDR *p;
#endif
 
    if (fp != NULL)
    fprintf(fp,"      MEMORY ALLOCATED : %lu, MAX was %lu\n",
        debugMemSize, debugMaxMemSize);
#ifdef MEM_LIST
    xmlMutexLock(xmlMemMutex);
    if (nr > 0) {
    fprintf(fp,"NUMBER   SIZE  TYPE   WHERE\n");
    p = memlist;
    while ((p) && nr > 0) {
          fprintf(fp,"%6lu %6lu ",p->mh_number,(unsigned long)p->mh_size);
        switch (p->mh_type) {
           case STRDUP_TYPE:fprintf(fp,"strdup()  in ");break;
           case MALLOC_TYPE:fprintf(fp,"malloc()  in ");break;
           case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc()  in ");break;
          case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
          case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
        default:fprintf(fp,"   ???    in ");break;
        }
        if (p->mh_file != NULL)
            fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
        if (p->mh_tag != MEMTAG)
        fprintf(fp,"  INVALID");
        xmlMemContentShow(fp, p);
        fprintf(fp,"\n");
        nr--;
        p = p->mh_next;
    }
    }
    xmlMutexUnlock(xmlMemMutex);
#endif /* MEM_LIST */
}

xmlMemStrdupLoc()

XMLPUBFUN char *XMLCALL xmlMemStrdupLoc	(	const char *	str,
		const char *	file,
		int	line
	)

Definition at line 490 of file xmlmemory.c.

{
    char *s;
    size_t size = strlen(str) + 1;
    MEMHDR *p;
 
    if (!xmlMemInitialized) xmlInitMemory();
    TEST_POINT
 
    if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
    xmlGenericError(xmlGenericErrorContext,
        "xmlMemStrdupLoc : Unsigned overflow\n");
    xmlMemoryDump();
    return(NULL);
    }
 
    p = (MEMHDR *) malloc(RESERVE_SIZE+size);
    if (!p) {
      goto error;
    }
    p->mh_tag = MEMTAG;
    p->mh_size = size;
    p->mh_type = STRDUP_TYPE;
    p->mh_file = file;
    p->mh_line = line;
    xmlMutexLock(xmlMemMutex);
    p->mh_number = ++block;
    debugMemSize += size;
    debugMemBlocks++;
    if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
    debugmem_list_add(p);
#endif
    xmlMutexUnlock(xmlMemMutex);
 
    s = (char *) HDR_2_CLIENT(p);
 
    if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
 
    strcpy(s,str);
 
    TEST_POINT
 
    if (xmlMemTraceBlockAt == s) {
    xmlGenericError(xmlGenericErrorContext,
            "%p : Strdup() Ok\n", xmlMemTraceBlockAt);
    xmlMallocBreakpoint();
    }
 
    return(s);
 
error:
    return(NULL);
}

Referenced by xmlMemoryStrdup().

xmlMemUsed()

XMLPUBFUN int XMLCALL xmlMemUsed

(

void

)

xmlMemUsed:

Provides the amount of memory currently allocated

Returns an int representing the amount of memory allocated.

Definition at line 568 of file xmlmemory.c.

                 {
    int res;
 
    xmlMutexLock(xmlMemMutex);
    res = debugMemSize;
    xmlMutexUnlock(xmlMemMutex);
    return(res);
}

Referenced by myMallocFunc(), myReallocFunc(), and myStrdupFunc().

xmlReallocLoc()

XMLPUBFUN void *XMLCALL xmlReallocLoc	(	void *	ptr,
		size_t	size,
		const char *	file,
		int	line
	)

Definition at line 312 of file xmlmemory.c.

{
    MEMHDR *p, *tmp;
    unsigned long number;
#ifdef DEBUG_MEMORY
    size_t oldsize;
#endif
 
    if (ptr == NULL)
        return(xmlMallocLoc(size, file, line));
 
    if (!xmlMemInitialized) xmlInitMemory();
    TEST_POINT
 
    p = CLIENT_2_HDR(ptr);
    number = p->mh_number;
    if (xmlMemStopAtBlock == number) xmlMallocBreakpoint();
    if (p->mh_tag != MEMTAG) {
       Mem_Tag_Err(p);
     goto error;
    }
    p->mh_tag = ~MEMTAG;
    xmlMutexLock(xmlMemMutex);
    debugMemSize -= p->mh_size;
    debugMemBlocks--;
#ifdef DEBUG_MEMORY
    oldsize = p->mh_size;
#endif
#ifdef MEM_LIST
    debugmem_list_delete(p);
#endif
    xmlMutexUnlock(xmlMemMutex);
 
    if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
    xmlGenericError(xmlGenericErrorContext,
        "xmlReallocLoc : Unsigned overflow\n");
    xmlMemoryDump();
    return(NULL);
    }
 
    tmp = (MEMHDR *) realloc(p,RESERVE_SIZE+size);
    if (!tmp) {
     free(p);
     goto error;
    }
    p = tmp;
    if (xmlMemTraceBlockAt == ptr) {
    xmlGenericError(xmlGenericErrorContext,
            "%p : Realloced(%lu -> %lu) Ok\n",
            xmlMemTraceBlockAt, (long unsigned)p->mh_size,
            (long unsigned)size);
    xmlMallocBreakpoint();
    }
    p->mh_tag = MEMTAG;
    p->mh_number = number;
    p->mh_type = REALLOC_TYPE;
    p->mh_size = size;
    p->mh_file = file;
    p->mh_line = line;
    xmlMutexLock(xmlMemMutex);
    debugMemSize += size;
    debugMemBlocks++;
    if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
    debugmem_list_add(p);
#endif
    xmlMutexUnlock(xmlMemMutex);
 
    TEST_POINT
 
#ifdef DEBUG_MEMORY
    xmlGenericError(xmlGenericErrorContext,
        "Realloced(%d to %d) Ok\n", oldsize, size);
#endif
    return(HDR_2_CLIENT(p));
 
error:
    return(NULL);
}

Referenced by xmlMemRealloc().