Add an example

Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Gary Guo <gary@garyguo.net>"]
 edition = "2018"
 
 [workspace]
-members = ["cdylib"]
+members = ["cdylib", "example"]
 
 [dependencies]
 gimli = { version = "0.25.0", default-features = false, features = ["read"] }

example/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "example"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+unwind = { path = "../", features = ["system-alloc", "personality", "panic-handler"] }
+libc = "0.2"

example/src/main.rs

@@ -0,0 +1,52 @@
+#![no_std]
+#![feature(start)]
+#![feature(default_alloc_error_handler)]
+
+extern crate alloc;
+extern crate unwind;
+
+use alloc::{borrow::ToOwned, string::String};
+use unwind::print::*;
+
+#[link(name = "c")]
+extern "C" {}
+
+struct PrintOnDrop(String);
+
+impl Drop for PrintOnDrop {
+    fn drop(&mut self) {
+        println!("dropped: {:?}", self.0);
+    }
+}
+
+struct PanicOnDrop;
+
+impl Drop for PanicOnDrop {
+    fn drop(&mut self) {
+        panic!("panic on drop");
+    }
+}
+
+fn foo() {
+    panic!("panic");
+}
+
+fn bar() {
+    let _p = PrintOnDrop("string".to_owned());
+    foo()
+}
+
+#[start]
+fn main(_argc: isize, _argv: *const *const u8) -> isize {
+    unwind::panic::catch_unwind(|| {
+        let _ = unwind::panic::catch_unwind(|| {
+            bar();
+            println!("done");
+        });
+        println!("caught");
+        let _p = PanicOnDrop;
+        foo();
+        0
+    })
+    .unwrap_or(101)
+}