Refactor

src/main.rs

@@ -11,9 +11,11 @@
     iter_map_windows,
     str_from_raw_parts,
     macro_metavar_expr,
-    macro_metavar_expr_concat
+    macro_metavar_expr_concat,
+    ptr_metadata
 )]
 
+use alloc::string::String;
 use embedded_alloc::LlffHeap as Heap;
 use log::info;
 
@@ -42,7 +44,7 @@ mod uart;
 mod user;
 mod vga;
 
-pub const HEAP_SIZE: usize = 1024 * 1024; // 1Mo RAM
+pub const HEAP_SIZE: usize = 1024 * 1024 * 32; // 32Mo RAM
 #[global_allocator]
 static HEAP: Heap = Heap::empty();