[xml] Problems register memory callback routines via xmlMemSetup()

["Henke, Markus" <Markus_Henke ordat com>]

Hello,

as a first step to use customized memory callback routines i've redefined
the default callbacks, that is:

===========================================================
static void testFreeFunc(void* ptr) {
  free(ptr);
}


static void *testMallocFunc(size_t size) {
  return malloc(size);
}


static void *testReallocFunc(void* ptr, size_t size) {
  return realloc(ptr, size);
}


static char *testStrdupFunc(const char* str) {
  return _strdup(str);
}
===========================================================


and register them via

===========================================================
xmlMemSetup(testFreeFunc, testMallocFunc, testReallocFunc, testStrdupFunc);
===========================================================


When i try to run my testprog, i get a debug-assertion:

===========================================================
Debug Assertion failed!

Program: ...
File: dbgheap.c
Line: 1044

Expression: _CrtIsValidHeapPointer(pUserData)
...
===========================================================


Call stack is:

===========================================================
_free_dbg_lk(void * 0x007c5fa8, int 1) line 1044 + 48 bytes
_free_dbg(void * 0x007c5fa8, int 1) line 1001 + 13 bytes
free(void * 0x007c5fa8) line 956 + 11 bytes
testFreeFunc(void * 0x007c5fa8) line 2137 + 12 bytes
xmlParserInputBufferGrow(_xmlParserInputBuffer * 0x007c4a68, int 493) line
2110 + 12 bytes
xmlParserInputGrow(_xmlParserInput * 0x007c5f20, int 250) line 1017 + 15
bytes
xmlParseDocument(_xmlParserCtxt * 0x007c5b30) line 7378 + 43 bytes
testOpenDocument(char * 0x007c25c8, long * 0x0012ff6c, long * 0x0012ff60)
line 392 + 11 bytes
main(int 2, char * * 0x007c2580) line 189 + 23 bytes
mainCRTStartup() line 338 + 17 bytes
KERNEL32! 77e87d08()
===========================================================


That's quite strange for me since the callbacks are identical to the default
memory routines
and the memory interface of libxml2 is unmistakably how to register them.
I'm really get stucked here...  8(

I'm using libxml2-2.4.2 (some reasons for havn't updating yet...) on Win2K,
MS-VC++ 6.0,
testProg and libxml2 are both compiled against the "debug multithreaded DLL"
C- runtime.
Is this a known issue (and maybe solved in the most recent version) or is it
my mistake
(won't be the first time...   8) ? 


Thanx in advance!

Mit freundlichen Gruessen - Kind regards
Markus Henke



________________________Addressed by:________________________
 ORDAT GmbH & Co. KG  -  Serversystems / eCom 
 Dipl.-Inf. (FH) Markus Henke  Fon: +49 (641) 7941-0
 Rathenaustr. 1                Fax: +49 (641) 7941-132
 35394 Gießen                  mailto:markus henke ordat com
 See:                          http://www.ordat.com
_____________________________________________________________
              ...this behavior is by design...

 <<Markus Henke.vcf>>

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