add vscode debug support. please see https://learningos.github.io/rust-based-os-comp2022/0setup-devel-env.html#vscode for more usage details

os2-ref/Cargo.toml

@@ -10,3 +10,7 @@ edition = "2018"
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 log = "0.4"
 riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
+
+[profile.release]
+debug = true
+opt-level = 0

os2-ref/Makefile

@@ -55,4 +55,7 @@ debug: build
 		tmux split-window -h "riscv64-unknown-elf-gdb -ex 'file $(KERNEL_ELF)' -ex 'set arch riscv:rv64' -ex 'target remote localhost:1234'" && \
 		tmux -2 attach-session -d
 
+dbg: build
+	qemu-system-riscv64 -machine virt -nographic -bios $(BOOTLOADER) -device loader,file=$(KERNEL_BIN),addr=$(KERNEL_ENTRY_PA) -s -S
+
 .PHONY: build env kernel clean run-inner

os2-ref/src/batch.rs

@@ -3,7 +3,7 @@ use crate::trap::TrapContext;
 use lazy_static::*;
 
 const USER_STACK_SIZE: usize = 4096;
-const KERNEL_STACK_SIZE: usize = 4096 * 2;
+const KERNEL_STACK_SIZE: usize = 4096 * 20;
 const MAX_APP_NUM: usize = 16;
 const APP_BASE_ADDRESS: usize = 0x80400000;
 const APP_SIZE_LIMIT: usize = 0x20000;