Annotate functions with __attribute__((no_sanitize))

dict.c

@@ -372,6 +372,7 @@ found_pool:
  * http://burtleburtle.net/bob/hash/doobs.html
  */
 
+ATTRIBUTE_NO_SANITIZE("unsigned-integer-overflow")
 static uint32_t
 xmlDictComputeBigKey(const xmlChar* data, int namelen, int seed) {
     uint32_t hash;
@@ -404,6 +405,7 @@ xmlDictComputeBigKey(const xmlChar* data, int namelen, int seed) {
  *
  * Neither of the two strings must be NULL.
  */
+ATTRIBUTE_NO_SANITIZE("unsigned-integer-overflow")
 static unsigned long
 xmlDictComputeBigQKey(const xmlChar *prefix, int plen,
                       const xmlChar *name, int len, int seed)

hash.c

@@ -79,6 +79,7 @@ struct _xmlHashTable {
  * xmlHashComputeKey:
  * Calculate the hash key
  */
+ATTRIBUTE_NO_SANITIZE("unsigned-integer-overflow")
 static unsigned long
 xmlHashComputeKey(xmlHashTablePtr table, const xmlChar *name,
 	          const xmlChar *name2, const xmlChar *name3) {
@@ -109,6 +110,7 @@ xmlHashComputeKey(xmlHashTablePtr table, const xmlChar *name,
     return (value % table->size);
 }
 
+ATTRIBUTE_NO_SANITIZE("unsigned-integer-overflow")
 static unsigned long
 xmlHashComputeQKey(xmlHashTablePtr table,
 		   const xmlChar *prefix, const xmlChar *name,

libxml.h

@@ -72,6 +72,13 @@ int vfprintf(FILE *, const char *, va_list);
 #define XML_POP_WARNINGS
 #endif
 
+#if defined(__clang__) || \
+    (defined(__GNUC__) && (__GNUC__ >= 8))
+#define ATTRIBUTE_NO_SANITIZE(arg) __attribute__((no_sanitize(arg)))
+#else
+#define ATTRIBUTE_NO_SANITIZE(arg)
+#endif
+
 /*
  * Internal variable indicating if a callback has been registered for
  * node creation/destruction. It avoids spending a lot of time in locking

xpath.c

@@ -7497,6 +7497,7 @@ xmlXPathMultValues(xmlXPathParserContextPtr ctxt) {
  * The numeric operators convert their operands to numbers as if
  * by calling the number function.
  */
+ATTRIBUTE_NO_SANITIZE("float-divide-by-zero")
 void
 xmlXPathDivValues(xmlXPathParserContextPtr ctxt) {
     xmlXPathObjectPtr arg;