added a test for stack_overflow

2 files changed, 62 insertions, 1 deletions

diff --git a/StrixKernel/Cargo.toml b/StrixKernel/Cargo.toml
index cd7e04a..35b86bd 100644
--- a/StrixKernel/Cargo.toml
+++ b/StrixKernel/Cargo.toml
@@ -1,13 +1,16 @@
 [package]
 name = "strix_os"
 version = "0.1.0"
-authors = ["Philipp Oppermann <dev@phil-opp.com>"]
 edition = "2024"
 
 [[test]]
 name = "should_panic"
 harness = false
 
+[[test]]
+name = "stack_overflow"
+harness = false
+
 [dependencies]
 bootloader = "0.9"
 volatile = "0.2.6"
diff --git a/StrixKernel/tests/stack_overflow.rs b/StrixKernel/tests/stack_overflow.rs
new file mode 100644
index 0000000..66f52a3
--- /dev/null
+++ b/StrixKernel/tests/stack_overflow.rs
@@ -0,0 +1,58 @@
+#![no_std]
+#![no_main]
+#![feature(abi_x86_interrupt)]
+
+use strix_os::{QemuExitCode, exit_qemu, serial_print, serial_println};
+use core::panic::PanicInfo;
+use lazy_static::lazy_static;
+use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
+
+#[unsafe(no_mangle)]
+pub extern "C" fn _start() -> ! {
+    serial_print!("stack_overflow::stack_overflow...\t");
+
+    strix_os::gdt::init();
+    init_test_idt();
+
+    // trigger a stack overflow
+    stack_overflow();
+
+    panic!("Execution continued after stack overflow");
+}
+
+#[allow(unconditional_recursion)]
+fn stack_overflow() {
+    stack_overflow(); // for each recursion, the return address is pushed
+    volatile::Volatile::new(0).read(); // prevent tail recursion optimizations
+}
+
+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(strix_os::gdt::DOUBLE_FAULT_IST_INDEX);
+        }
+
+        idt
+    };
+}
+
+pub fn init_test_idt() {
+    TEST_IDT.load();
+}
+
+extern "x86-interrupt" fn test_double_fault_handler(
+    _stack_frame: InterruptStackFrame,
+    _error_code: u64,
+) -> ! {
+    serial_println!("[ok]");
+    exit_qemu(QemuExitCode::Success);
+    loop {}
+}
+
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    strix_os::test_panic_handler(info)
+}
\ No newline at end of file