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parser: Use counted_by attribute if supported

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We only have a single struct with a flexible array member.
This commit is contained in:
Nick Wellnhofer 2024-10-24 18:18:47 +02:00
parent 944e5fe8df
commit b52a3044aa
2 changed files with 8 additions and 1 deletions
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7
libxml.h
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@ -57,6 +57,13 @@
#define ATTRIBUTE_DESTRUCTOR __attribute__((destructor))
#endif
#if (defined(__clang__) && __clang_major__ >= 18) || \
(defined(__GNUC__) && __GNUC__ >= 15)
#define ATTRIBUTE_COUNTED_BY(c) __attribute__((__counted_by__(c)))
#else
#define ATTRIBUTE_COUNTED_BY(c)
#endif
#if defined(__clang__) || \
(defined(__GNUC__) && (__GNUC__ >= 8) && !defined(__EDG__))
#define ATTRIBUTE_NO_SANITIZE(arg) __attribute__((no_sanitize(arg)))

2
parser.c
View File

@ -993,7 +993,7 @@ struct _xmlDefAttrs {
int maxAttrs; /* the size of the array */
#if __STDC_VERSION__ >= 199901L
/* Using a C99 flexible array member avoids UBSan errors. */
xmlDefAttr attrs[]; /* array of localname/prefix/values/external */
xmlDefAttr attrs[] ATTRIBUTE_COUNTED_BY(maxAttrs);
#else
xmlDefAttr attrs[1];
#endif