Raise RuntimeError if Kernel#binding is called from a non-Ruby frame

Check whether the current or previous frame is a Ruby frame in
call_trace_func before attempting to create a binding for the frame.

Fixes [Bug #18487]

Co-authored-by: Alan Wu <[email protected]>

1 files changed, 8 insertions, 1 deletions

diff --git a/vm_trace.c b/vm_trace.c
index 5fa9acd487..b9ba6de73e 100644
--- a/vm_trace.c
+++ b/vm_trace.c
@@ -719,7 +719,14 @@ call_trace_func(rb_event_flag_t event, VALUE proc, VALUE self, ID id, VALUE klas
     argv[1] = filename;
     argv[2] = INT2FIX(line);
     argv[3] = id ? ID2SYM(id) : Qnil;
-    argv[4] = (self && (filename != Qnil)) ? rb_binding_new() : Qnil;
+    argv[4] = Qnil;
+    if (self && (filename != Qnil) &&
+        event != RUBY_EVENT_C_CALL &&
+        event != RUBY_EVENT_C_RETURN &&
+        (VM_FRAME_RUBYFRAME_P(ec->cfp) ||
+         VM_FRAME_RUBYFRAME_P(RUBY_VM_PREVIOUS_CONTROL_FRAME(ec->cfp)))) {
+        argv[4] = rb_binding_new();
+    }
     argv[5] = klass ? klass : Qnil;
 
     rb_proc_call_with_block(proc, 6, argv, Qnil);