summaryrefslogtreecommitdiffstats
path: root/js/rust/src/panic.rs
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
commit2aa4a82499d4becd2284cdb482213d541b8804dd (patch)
treeb80bf8bf13c3766139fbacc530efd0dd9d54394c /js/rust/src/panic.rs
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/rust/src/panic.rs')
-rw-r--r--js/rust/src/panic.rs34
1 files changed, 34 insertions, 0 deletions
diff --git a/js/rust/src/panic.rs b/js/rust/src/panic.rs
new file mode 100644
index 0000000000..496ed9b33d
--- /dev/null
+++ b/js/rust/src/panic.rs
@@ -0,0 +1,34 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::any::Any;
+use std::cell::RefCell;
+use std::panic::{catch_unwind, resume_unwind, UnwindSafe};
+
+thread_local!(static PANIC_RESULT: RefCell<Option<Box<Any + Send>>> = RefCell::new(None));
+
+/// If there is a pending panic, resume unwinding.
+pub fn maybe_resume_unwind() {
+ if let Some(error) = PANIC_RESULT.with(|result| result.borrow_mut().take()) {
+ resume_unwind(error);
+ }
+}
+
+/// Generic wrapper for JS engine callbacks panic-catching
+pub fn wrap_panic<F, R>(function: F, generic_return_type: R) -> R
+where
+ F: FnOnce() -> R + UnwindSafe,
+{
+ let result = catch_unwind(function);
+ match result {
+ Ok(result) => result,
+ Err(error) => {
+ PANIC_RESULT.with(|result| {
+ assert!(result.borrow().is_none());
+ *result.borrow_mut() = Some(error);
+ });
+ generic_return_type
+ }
+ }
+}