From 67adccf16adda2b8a6d644ef087356f566bf2b2e Mon Sep 17 00:00:00 2001
From: Sean Cross <sean@xobs.io>
Date: Thu, 29 Oct 2020 19:38:27 +0800
Subject: [PATCH] xous: hosted: attach to debugger on panic

When a `panic!()` is hit and we're running in a hosted environment,
attach a debugger using `debug-here`.

Signed-off-by: Sean Cross <sean@xobs.io>
---
 xous-rs/Cargo.toml |  1 +
 xous-rs/src/lib.rs | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/xous-rs/Cargo.toml b/xous-rs/Cargo.toml
index e5caa1589..93c6bfa37 100644
--- a/xous-rs/Cargo.toml
+++ b/xous-rs/Cargo.toml
@@ -24,3 +24,4 @@ default = []
 [target.'cfg(any(windows,unix))'.dependencies]
 lazy_static = "1.4"
 hex = "0.4"
+debug-here = "*"
diff --git a/xous-rs/src/lib.rs b/xous-rs/src/lib.rs
index 795e62f3d..b13d0ad34 100644
--- a/xous-rs/src/lib.rs
+++ b/xous-rs/src/lib.rs
@@ -22,6 +22,19 @@ pub use syscall::*;
 #[cfg(not(target_os = "none"))]
 pub use arch::ProcessArgsAsThread;
 
+#[cfg(target_os = "none")]
+pub fn init() {}
+
+#[cfg(not(target_os = "none"))]
+pub fn init() {
+    use std::panic;
+    panic::set_hook(Box::new(|arg| {
+        println!("PANIC!");
+        println!("Details: {:?}", arg);
+        debug_here::debug_here!();
+    }));
+}
+
 /// Convert a four-letter string into a 32-bit int.
 #[macro_export]
 macro_rules! make_name {
@@ -39,6 +52,7 @@ macro_rules! maybe_main {
         extern "Rust" {
             fn xous_entry() -> !;
         }
+
         fn main() {
             xous::arch::ensure_connection().unwrap();
             unsafe { xous_entry() };