1 files changed, 30 insertions, 0 deletions
diff --git a/plugins/workflow_objc/src/error.rs b/plugins/workflow_objc/src/error.rs
new file mode 100644
index 00000000..75328226
--- /dev/null
+++ b/plugins/workflow_objc/src/error.rs
@@ -0,0 +1,30 @@
+use thiserror::Error;
+
+/// A marker type for workflow registration errors
+#[derive(Debug, Error)]
+#[error("Failed to register workflow activity")]
+pub struct WorkflowRegistrationError;
+
+impl From<()> for WorkflowRegistrationError {
+    fn from(_: ()) -> Self {
+        WorkflowRegistrationError
+    }
+}
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("Unable to retrieve low-level IL for function at {func_start:#x}")]
+    MissingLowLevelIL { func_start: u64 },
+
+    #[error("Unable to retrieve low-level SSA IL for function at {func_start:#x}")]
+    MissingSsaForm { func_start: u64 },
+
+    #[error("Unexpected LLIL operation at address {address:#x} (expected {expected})")]
+    UnexpectedLlilOperation { address: u64, expected: String },
+
+    #[error("Invalid selector at address {address:#x}")]
+    InvalidSelector { address: u64 },
+
+    #[error(transparent)]
+    WorkflowRegistrationFailed(#[from] WorkflowRegistrationError),
+}