log crash traceback, copilot

src/common.rs

@@ -115,6 +115,50 @@ pub fn global_init() -> bool {
             crate::server::wayland::init();
         }
     }
+    // Install panic hook to log backtrace on all platforms
+    std::env::set_var("RUST_BACKTRACE", "1");
+    std::panic::set_hook(Box::new(|info| {
+        let thread = std::thread::current().name().unwrap_or("unnamed");
+        let location = info
+            .location()
+            .map(|l| format!("{}:{}:{}", l.file(), l.line(), l.column()))
+            .unwrap_or_else(|| "unknown".into());
+        let msg = if let Some(s) = info.payload().downcast_ref::<&str>() {
+            *s
+        } else if let Some(s) = info.payload().downcast_ref::<String>() {
+            s.as_str()
+        } else {
+            "Box<Any>"
+        };
+        let bt = std::backtrace::Backtrace::force_capture();
+        let out = format!("thread '{}' panicked at '{}', {}\nBacktrace:\n{bt:?}", thread, msg, location);
+        eprintln!("{}", out);
+        log::error!("{}", out);
+    }));
+    // Native crash handlers
+    #[cfg(unix)]
+    unsafe {
+        extern "C" fn crash_signal_handler(sig: libc::c_int) {
+            let bt = std::backtrace::Backtrace::force_capture();
+            eprintln!("native crash signal {}\nBacktrace:\n{bt:?}", sig);
+            log::error!("native crash signal {}\nBacktrace:\n{bt:?}", sig);
+        }
+        for &s in &[libc::SIGSEGV, libc::SIGABRT, libc::SIGILL, libc::SIGFPE, libc::SIGBUS] {
+            libc::signal(s, crash_signal_handler as usize);
+        }
+    }
+    #[cfg(windows)]
+    unsafe {
+        use winapi::um::{errhandlingapi::SetUnhandledExceptionFilter, minwinbase::EXCEPTION_POINTERS};
+        extern "system" fn unhandled_exception_filter(_: *mut EXCEPTION_POINTERS) -> i32 {
+            let bt = std::backtrace::Backtrace::force_capture();
+            eprintln!("native unhandled exception\nBacktrace:\n{bt:?}");
+            log::error!("native unhandled exception\nBacktrace:\n{bt:?}");
+            // EXCEPTION_EXECUTE_HANDLER = 1
+            1
+        }
+        SetUnhandledExceptionFilter(Some(unhandled_exception_filter));
+    }
     true
 }