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ld: put wild matching_sections on an obstack

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so that the memory can be reclaimed easily when reset_resolved_wilds
throws it all away.

	* ldlang.c (matching_obstack): New static var.
	(add_matching_section): Rewrite to use matching_obstack.
	(lang_init): Init matching_obstack.
	(reset_resolved_wilds): Free matching_obstack.
This commit is contained in:
Alan Modra 2026-01-16 16:19:31 +10:30
parent 1522f86f18
commit e6357caf75
1 changed files with 12 additions and 6 deletions
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18
ld/ldlang.c
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@ -62,6 +62,7 @@
/* Local variables. */
static struct obstack stat_obstack;
static struct obstack map_obstack;
static struct obstack matching_obstack;
static struct obstack pt_obstack;
#define obstack_chunk_alloc xmalloc
@ -452,12 +453,14 @@ add_matching_section (lang_wild_statement_type *ptr,
asection *section,
lang_input_statement_type *file)
{
lang_input_matcher_type *new_section;
/* Add a section reference to the list. */
new_section = new_stat (lang_input_matcher, &ptr->matching_sections);
new_section->section = section;
new_section->pattern = sec;
new_section->input_stmt = file;
lang_statement_union_type *n
= obstack_alloc (&matching_obstack, sizeof (lang_input_matcher_type));
n->header.type = lang_input_matcher_enum;
n->header.next = NULL;
n->input_matcher.section = section;
n->input_matcher.pattern = sec;
n->input_matcher.input_stmt = file;
lang_statement_append (&ptr->matching_sections, n, &n->header.next);
}
/* Process section S (from input file FILE) in relation to wildcard
@ -1388,6 +1391,7 @@ lang_init (bool object_only)
{
obstack_begin (&stat_obstack, 1000);
obstack_init (&pt_obstack);
obstack_init (&matching_obstack);
}
stat_ptr = &statement_list;
@ -8313,6 +8317,8 @@ static void
reset_resolved_wilds (void)
{
lang_for_each_statement (reset_one_wild);
obstack_free (&matching_obstack, NULL);
obstack_init (&matching_obstack);
}
/* For each output section statement, splice any entries on the