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Hardening of XPath evaluation

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Add a mechanism of frame for XPath evaluation when entering a function
or a scoped evaluation, also fix a potential problem in predicate
evaluation.
This commit is contained in:
Daniel Veillard
2011-08-18 17:10:13 +08:00
parent 69f04562f7
commit f5048b3e71
3 changed files with 68 additions and 7 deletions
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5
include/libxml/xpath.h
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@@ -68,7 +68,8 @@ typedef enum {
XPATH_UNDEF_PREFIX_ERROR,
XPATH_ENCODING_ERROR,
XPATH_INVALID_CHAR_ERROR,
XPATH_INVALID_CTXT
XPATH_INVALID_CTXT,
XPATH_STACK_ERROR
} xmlXPathError;
/*
@@ -380,6 +381,8 @@ struct _xmlXPathParserContext {
xmlXPathCompExprPtr comp; /* the precompiled expression */
int xptr; /* it this an XPointer expression */
xmlNodePtr ancestor; /* used for walking preceding axis */
int valueFrame; /* used to limit Pop on the stack */
};
/************************************************************************