diff --git a/ch4/os/src/main.rs b/ch4/os/src/main.rs
index 0982f5f..eb00600 100644
--- a/ch4/os/src/main.rs
+++ b/ch4/os/src/main.rs
@@ -1,4 +1,5 @@
 #![feature(panic_info_message)]
+#![feature(alloc_error_handler)]
 #![no_std]
 #![no_main]
 
diff --git a/ch4/os/src/mm/heap_allocator.rs b/ch4/os/src/mm/heap_allocator.rs
index dc073b8..369aa0d 100644
--- a/ch4/os/src/mm/heap_allocator.rs
+++ b/ch4/os/src/mm/heap_allocator.rs
@@ -1,3 +1,4 @@
+
 use alloc::boxed::Box;
 use alloc::vec;
 use buddy_system_allocator::LockedHeap;
@@ -9,6 +10,8 @@ use crate::println;
 #[global_allocator]
 static HEAP_ALLOCATOR: LockedHeap = LockedHeap::empty();
 
+// 内存分配失败时, 会调用此错误处理函数
+
 // 堆的空间
 static mut HEAP_SPACE: [u8; KERNEL_HEAP_SIZE] = [0; KERNEL_HEAP_SIZE];
 
@@ -56,4 +59,9 @@ pub fn heap_test() {
 
     // 通过输出打印, 发现 a 和b 均被分配在了 HEAP_SPACE 中, 且 HEAP_SPACE 被分配在了 bss段中, 这个段由我们 linker.ld 进行手动布局
     // 目前整个bss段的大小都是3M, 说明当前bss段中只有这一个 数据
-}
\ No newline at end of file
+}
+
+#[alloc_error_handler]
+pub fn handle_alloc_error(layout: core::alloc::Layout) -> ! {
+    panic!("Heap allocation error, layout = {:?}", layout);
+}