Update.

runtime/runtime.h

@@ -88,6 +88,20 @@ typedef struct {
 
 struct MethodCache_s;
 
+typedef struct {
+    int catch_label;
+    int finally_label;
+    int end_label;
+    int exception_local;
+    size_t stack_depth;
+} RavaExceptionHandler_t;
+
+typedef struct {
+    RavaExceptionHandler_t *handlers;
+    size_t count;
+    size_t capacity;
+} RavaExceptionStack_t;
+
 typedef struct {
     RavaProgram_t *program;
     RavaCallStack_t *call_stack;
@@ -95,6 +109,9 @@ typedef struct {
     struct MethodCache_s *method_cache;
     char *error_message;
     bool had_error;
+    bool has_exception;
+    RavaValue_t exception_value;
+    RavaExceptionStack_t *exception_stack;
 } RavaVM_t;
 
 RavaValue_t rava_value_int(int32_t value);