Do not delete main chunk in zend_gc

danog · danog · commit 0f321b026d7e · 2025-06-04T12:09:37.000+02:00
diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
@@ -2047,7 +2047,7 @@ ZEND_API size_t zend_mm_gc(zend_mm_heap *heap)
 				i++;
 			}
 		}
-		if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {
+		if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE && chunk != heap->main_chunk) {
 			zend_mm_chunk *next_chunk = chunk->next;
 
 			zend_mm_delete_chunk(heap, chunk);

Original file line number	Diff line number	Diff line change
`@@ -2047,7 +2047,7 @@ ZEND_API size_t zend_mm_gc(zend_mm_heap *heap)`
`2047`	`2047`	`i++;`
`2048`	`2048`	`}`
`2049`	`2049`	`}`
`2050`		`- if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {`
	`2050`	`+ if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE && chunk != heap->main_chunk) {`
`2051`	`2051`	`zend_mm_chunk *next_chunk = chunk->next;`
`2052`	`2052`
`2053`	`2053`	`zend_mm_delete_chunk(heap, chunk);`