From 5ae30836134e6f8f50700f54f35b6c58d0cfb3df Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Sat, 19 Oct 2024 12:44:25 +0200
Subject: [PATCH 1/2] Use ZendMM for libgmp

As is, ext/gmp uses the default memory allocator of the underlying
libgmp; this allocator is fallible, but contrary to ZendMM, it
`abort()`s without giving us an opportunity to do a cleaner shutdown.
Furthermore, the libgmp allocator obviously doesn't heed memory_limit.
Thus we install wrappers of the ZendMM API as libgmp allocator.
---
 ext/gmp/gmp.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/ext/gmp/gmp.c b/ext/gmp/gmp.c
index f3cb4a6ce101..c8b1de057b9a 100644
--- a/ext/gmp/gmp.c
+++ b/ext/gmp/gmp.c
@@ -521,6 +521,21 @@ static int gmp_unserialize(zval *object, zend_class_entry *ce, const unsigned ch
 }
 /* }}} */
 
+static void *gmp_alloc(size_t size)
+{
+	return emalloc(size);
+}
+
+static void *gmp_realloc(void *ptr, size_t old_size, size_t new_size)
+{
+	return erealloc(ptr, new_size);
+}
+
+static void gmp_free(void *ptr, size_t size)
+{
+	efree(ptr);
+}
+
 /* {{{ ZEND_GINIT_FUNCTION */
 static ZEND_GINIT_FUNCTION(gmp)
 {
@@ -551,6 +566,8 @@ ZEND_MINIT_FUNCTION(gmp)
 
 	register_gmp_symbols(module_number);
 
+	mp_set_memory_functions(gmp_alloc, gmp_realloc, gmp_free);
+
 	return SUCCESS;
 }
 /* }}} */

From 0dfb965c55a1c18b56f2d041edb4963e04e7cfcf Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Sat, 19 Oct 2024 13:36:53 +0200
Subject: [PATCH 2/2] Use `efree_size()`

---
 ext/gmp/gmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/gmp/gmp.c b/ext/gmp/gmp.c
index c8b1de057b9a..3198215074e2 100644
--- a/ext/gmp/gmp.c
+++ b/ext/gmp/gmp.c
@@ -533,7 +533,7 @@ static void *gmp_realloc(void *ptr, size_t old_size, size_t new_size)
 
 static void gmp_free(void *ptr, size_t size)
 {
-	efree(ptr);
+	efree_size(ptr, size);
 }
 
 /* {{{ ZEND_GINIT_FUNCTION */