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fixed a serious memory problen when walking the namespace axis showing up

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* xpath.c include/libxml/xpath.h: fixed a serious memory problen
  when walking the namespace axis showing up in
  libxst/tests/general/bug-12
* xmlmemory.c: added the possibility to trace a given block
  defined by its address
Daniel
This commit is contained in:
Daniel Veillard 2001-07-30 13:42:13 +00:00
parent 4aafa79013
commit 7d7e37919f
4 changed files with 77 additions and 11 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
Mon Jul 30 12:58:39 EDT 2001 Daniel Veillard <Daniel.Veillard@imag.fr>
* xpath.c include/libxml/xpath.h: fixed a serious memory problen
when walking the namespace axis showing up in
libxst/tests/general/bug-12
* xmlmemory.c: added the possibility to trace a given block
defined by its address
Sun Jul 29 07:18:53 EDT 2001 Daniel Veillard <Daniel.Veillard@imag.fr>
* parser.c: don't override existing encoding specified before

4
include/libxml/xpath.h
View File

@ -235,6 +235,10 @@ struct _xmlXPathContext {
/* function lookup function and data */
void *funcLookupFunc; /* function lookup func */
void *funcLookupData; /* function lookup data */
/* temporary namespace lists kept for walking the namespace axis */
xmlNsPtr *tmpNsList; /* Array of namespaces */
int tmpNsNr; /* number of namespace in scope */
};
/*

55
xmlmemory.c
View File

@ -95,6 +95,7 @@ static unsigned long debugMemSize = 0;
static unsigned long debugMaxMemSize = 0;
static int block=0;
int xmlMemStopAtBlock = 0;
void *xmlMemTraceBlockAt = NULL;
int xmlMemInitialized = 0;
#ifdef MEM_LIST
static MEMHDR *memlist = NULL;
@ -140,6 +141,7 @@ void *
xmlMallocLoc(size_t size, const char * file, int line)
{
MEMHDR *p;
void *ret;
if (!xmlMemInitialized) xmlInitMemory();
#ifdef DEBUG_MEMORY
@ -176,9 +178,17 @@ xmlMallocLoc(size_t size, const char * file, int line)
if (xmlMemStopAtBlock == block) xmlMallocBreakpoint();
ret = HDR_2_CLIENT(p);
if (xmlMemTraceBlockAt == ret) {
xmlGenericError(xmlGenericErrorContext,
"%p : Malloc(%d) Ok\n", xmlMemTraceBlockAt, size);
xmlMallocBreakpoint();
}
TEST_POINT
return(HDR_2_CLIENT(p));
return(ret);
}
/**
@ -233,6 +243,12 @@ xmlReallocLoc(void *ptr,size_t size, const char * file, int line)
if (!p) {
goto error;
}
if (xmlMemTraceBlockAt == ptr) {
xmlGenericError(xmlGenericErrorContext,
"%p : Realloced(%d -> %d) Ok\n",
xmlMemTraceBlockAt, p->mh_size, size);
xmlMallocBreakpoint();
}
p->mh_tag = MEMTAG;
p->mh_number = number;
p->mh_type = REALLOC_TYPE;
@ -280,14 +296,26 @@ xmlMemFree(void *ptr)
MEMHDR *p;
char *target;
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;
Mem_Tag_Err(p);
goto error;
}
p->mh_tag = ~MEMTAG;
debugMemSize -= p->mh_size;
@ -305,6 +333,7 @@ xmlMemFree(void *ptr)
error:
xmlGenericError(xmlGenericErrorContext,
"xmlFree(%lX) error\n", (unsigned long) ptr);
xmlMallocBreakpoint();
return;
}
@ -355,6 +384,12 @@ xmlMemStrdupLoc(const char *str, const char *file, int line)
TEST_POINT
if (xmlMemTraceBlockAt == s) {
xmlGenericError(xmlGenericErrorContext,
"%p : Strdup() Ok\n", xmlMemTraceBlockAt);
xmlMallocBreakpoint();
}
return(s);
error:
@ -504,6 +539,7 @@ xmlMemDisplay(FILE *fp)
#ifdef MEM_LIST
MEMHDR *p;
int idx;
int nb = 0;
#if defined(HAVE_LOCALTIME) && defined(HAVE_STRFTIME)
time_t currentTime;
char buf[500];
@ -532,7 +568,12 @@ xmlMemDisplay(FILE *fp)
if (p->mh_file != NULL) fprintf(fp,"%s(%d)", p->mh_file, p->mh_line);
if (p->mh_tag != MEMTAG)
fprintf(fp," INVALID");
xmlMemContentShow(fp, p);
nb++;
if (nb < 100)
xmlMemContentShow(fp, p);
else
fprintf(fp," skip");
fprintf(fp,"\n");
p = p->mh_next;
}
@ -655,6 +696,12 @@ xmlInitMemory(void)
sscanf(breakpoint, "%d", &xmlMemStopAtBlock);
}
#endif
#ifdef HAVE_STDLIB_H
breakpoint = getenv("XML_MEM_TRACE");
if (breakpoint != NULL) {
sscanf(breakpoint, "%p", &xmlMemTraceBlockAt);
}
#endif
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,

21
xpath.c
View File

@ -5043,16 +5043,23 @@ xmlXPathNextPrecedingInternal(xmlXPathParserContextPtr ctxt,
*/
xmlNodePtr
xmlXPathNextNamespace(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) {
xmlNodePtr ret;
if (ctxt->context->node->type != XML_ELEMENT_NODE) return(NULL);
if ((cur == NULL) || (ctxt->context->namespaces == NULL)) {
if (ctxt->context->namespaces != NULL)
xmlFree(ctxt->context->namespaces);
ctxt->context->namespaces =
if ((cur == NULL) || (ctxt->context->tmpNsList == NULL)) {
if (ctxt->context->tmpNsList != NULL)
xmlFree(ctxt->context->tmpNsList);
ctxt->context->tmpNsList =
xmlGetNsList(ctxt->context->doc, ctxt->context->node);
if (ctxt->context->namespaces == NULL) return(NULL);
ctxt->context->nsNr = 0;
if (ctxt->context->tmpNsList == NULL) return(NULL);
ctxt->context->tmpNsNr = 0;
}
return((xmlNodePtr)ctxt->context->namespaces[ctxt->context->nsNr++]);
ret = (xmlNodePtr)ctxt->context->tmpNsList[ctxt->context->tmpNsNr++];
if (ret == NULL) {
xmlFree(ctxt->context->tmpNsList);
ctxt->context->tmpNsList = NULL;
}
return(ret);
}
/**