Disable MJIT on a couple of conditions

mjit.c

@@ -370,6 +370,20 @@ mjit_compile(FILE *f, const rb_iseq_t *iseq, const char *funcname, int id)
 // JIT buffer
 uint8_t *rb_mjit_mem_block = NULL;
 
+MJIT_FUNC_EXPORTED void
+rb_mjit_bop_redefined(int redefined_flag, enum ruby_basic_operators bop)
+{
+    if (!mjit_call_p) return;
+    mjit_call_p = false;
+}
+
+void
+rb_mjit_before_ractor_spawn(void)
+{
+    if (!mjit_call_p) return;
+    mjit_call_p = false;
+}
+
 void
 rb_mjit_compile(const rb_iseq_t *iseq)
 {

mjit.h

@@ -114,6 +114,9 @@ extern void rb_mjit_tracing_invalidate_all(rb_event_flag_t new_iseq_events);
 
 void mjit_child_after_fork(void);
 
+extern void rb_mjit_bop_redefined(int redefined_flag, enum ruby_basic_operators bop);
+extern void rb_mjit_before_ractor_spawn(void);
+
 #  ifdef MJIT_HEADER
 #define mjit_enabled true
 #  else // MJIT_HEADER
@@ -143,5 +146,8 @@ static inline VALUE mjit_pause(bool wait_p){ return Qnil; } // unreachable
 static inline VALUE mjit_resume(void){ return Qnil; } // unreachable
 static inline void mjit_finish(bool close_handle_p){}
 
+static inline void rb_mjit_bop_redefined(int redefined_flag, enum ruby_basic_operators bop) {}
+static inline void rb_mjit_before_ractor_spawn(void) {}
+
 # endif // USE_MJIT
 #endif // RUBY_MJIT_H