1 files changed, 60 insertions, 0 deletions
diff --git a/tests/run-make/wasm-exceptions-nostd/src/lib.rs b/tests/run-make/wasm-exceptions-nostd/src/lib.rs
new file mode 100644
index 000000000..7049d2fd9
--- /dev/null
+++ b/tests/run-make/wasm-exceptions-nostd/src/lib.rs
@@ -0,0 +1,60 @@
+#![no_std]
+#![crate_type = "cdylib"]
+
+// Allow a few unstable features because we create a panic
+// runtime for native wasm exceptions from scratch
+
+#![feature(core_intrinsics)]
+#![feature(lang_items)]
+#![feature(link_llvm_intrinsics)]
+#![feature(panic_info_message)]
+
+extern crate alloc;
+
+/// This module allows us to use `Box`, `String`, ... even in no-std
+mod arena_alloc;
+
+/// This module allows logging text, even in no-std
+mod logging;
+
+/// This module allows exceptions, even in no-std
+#[cfg(target_arch = "wasm32")]
+mod panicking;
+
+use alloc::boxed::Box;
+use alloc::string::String;
+
+struct LogOnDrop;
+
+impl Drop for LogOnDrop {
+    fn drop(&mut self) {
+        logging::log_str("Dropped");
+    }
+}
+
+#[allow(unreachable_code)]
+#[allow(unconditional_panic)]
+#[no_mangle]
+pub extern "C" fn start() -> usize {
+    let data = 0x1234usize as *mut u8; // Something to recognize
+
+    unsafe {
+        core::intrinsics::r#try(|data: *mut u8| {
+            let _log_on_drop = LogOnDrop;
+
+            logging::log_str(&alloc::format!("`r#try` called with ptr {:?}", data));
+            let x = [12];
+            let _ = x[4]; // should panic
+
+            logging::log_str("This line should not be visible! :(");
+        }, data, |data, exception| {
+            let exception = *Box::from_raw(exception as *mut String);
+            logging::log_str("Caught something!");
+            logging::log_str(&alloc::format!("  data     : {:?}", data));
+            logging::log_str(&alloc::format!("  exception: {:?}", exception));
+        });
+    }
+
+    logging::log_str("This program terminates correctly.");
+    0
+}