added intergration test for stack overflow

Cargo.toml

@@ -23,3 +23,7 @@ test-timeout = 5    # (in seconds)
 [[test]]
 name = "should_panic"
 harness = false
+
+[[test]]
+name = "stack_overflow"
+harness = false

tests/basic_boot.rs

@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
 #![feature(custom_test_frameworks)]
-#![test_runner(orust_os:test_runner)]
+#![test_runner(orust_os::test_runner)]
 #![reexport_test_harness_main = "test_main"]
 
 use core::panic::PanicInfo;

tests/stack_overflow.rs

@@ -0,0 +1,57 @@
+#![feature(abi_x86_interrupt)]
+#![no_std]
+#![no_main]
+
+use orust_os::{exit_qemu, QemuExitCode, serial_print, serial_println};
+use lazy_static::lazy_static;
+use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
+
+lazy_static! {
+    static ref TEST_IDT: InterruptDescriptorTable = {
+        let mut idt = InterruptDescriptorTable::new();
+        unsafe {
+            idt.double_fault
+                .set_handler_fn(test_double_fault_handler)
+                .set_stack_index(orust_os::gdt::DOUBLE_FAULT_IST_INDEX);
+        }
+
+        idt
+    };
+}
+
+use core::panic::PanicInfo;
+
+#[no_mangle]
+pub extern "C" fn _start() -> ! {
+    serial_print!("stack_overflow::stack_overflow...\t");
+
+    orust_os::gdt::init();
+    init_test_idt();
+
+    stack_overflow();
+
+    panic!("Execution continued after stack overflow");
+}
+
+extern "x86-interrupt" fn test_double_fault_handler(
+    _stack_frame: InterruptStackFrame,
+    _error_code: u64,
+) -> ! {
+    serial_println!("[ok]");
+    exit_qemu(QemuExitCode::Success);
+    loop {}
+}
+
+pub fn init_test_idt() {
+    TEST_IDT.load();
+}
+
+#[allow(unconditional_recursion)]
+fn stack_overflow() {
+    stack_overflow();
+    volatile::Volatile::new(0).read();
+}
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    orust_os::test_panic_handler(info)
+}

tests/test-skeleton.txt

@@ -0,0 +1,14 @@
+#![no_std]
+#![no_main]
+
+use core::panic::PanicInfo;
+
+#[no_mangle]
+pub extern "C" fn _start() -> ! {
+    unimplemented!();
+}
+
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    orust_os::test_panic_handler(info)
+}