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Make build_property() xstrdup its name argument

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The name field of 'struct property' was really always supposed to be a
malloc()ed string, that is owned by the structure.  To avoid an extra
strdup() for strings coming up from the lexer, build_property() and
build_property_delete() expect to take such an already malloc()ed string,
which means it's not correct to pass it a static string literal.

That's a pretty non-obvious constraint, so a bunch of incorrect uses have
crept in.  Really, avoiding the extra dup from the lexer isn't a big enough
benefit for this demonstrably dangerous interface.  So change it to do the
xstrdup() itself, removing the burden from callers.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2023-02-27 23:11:29 +11:00
parent 9cceabea1e
commit 0b842c3c81
4 changed files with 10 additions and 7 deletions
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dtc.h
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@ -260,9 +260,9 @@ struct node {
void add_label(struct label **labels, char *label);
void delete_labels(struct label **labels);
struct property *build_property(char *name, struct data val,
struct property *build_property(const char *name, struct data val,
struct srcpos *srcpos);
struct property *build_property_delete(char *name);
struct property *build_property_delete(const char *name);
struct property *chain_property(struct property *first, struct property *list);
struct property *reverse_properties(struct property *first);