From 465655674b9c5687eaaa2e6c9463429f69eff0fd Mon Sep 17 00:00:00 2001
From: Lephenixnoir <sebastien.michelland@protonmail.com>
Date: Sun, 1 Jan 2023 19:23:08 +0100
Subject: [PATCH] dso: dynamically allocate destructor table

This saves static memory on mono targets where it's scarce.
---
 src/dso.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/dso.c b/src/dso.c
index 0dc7215..8b572ba 100644
--- a/src/dso.c
+++ b/src/dso.c
@@ -1,4 +1,4 @@
-#include <stddef.h>
+#include <stdlib.h>
 
 /* We don't support shared object loading, so provide a single handle */
 __attribute__((visibility("hidden")))
@@ -13,12 +13,18 @@ struct dtor {
 	void *d;
 };
 
-static struct dtor _dtors[ATEXIT_MAX];
+static struct dtor *_dtors;
 static int _dtor_count = 0;
 
+__attribute__((constructor))
+static void alloc_dtors(void)
+{
+	_dtors = malloc(ATEXIT_MAX * sizeof *_dtors);
+}
+
 int __cxa_atexit(void (*f)(void *), void *p, void *d)
 {
-	if(_dtor_count >= ATEXIT_MAX)
+	if(!_dtors || _dtor_count >= ATEXIT_MAX)
 		return 1;
 	_dtors[_dtor_count++] = (struct dtor){ f, p, d };
 	return 0;