add NimFrameFilter to nim-gdb.py (#10873)

tools/nim-gdb.py

@@ -561,6 +561,20 @@ class NimTablePrinter:
 #     raise ValueError("RTI is absent or incomplete, can't find union definition in RTI")
 
 
+################################################################################
+
+class NimFrameFilter:
+  def __init__(self):
+    self.name = "nim-frame-filter"
+    self.enabled = True
+    self.priority = 100
+    self.hidden =  {"NimMainInner","NimMain", "main"}
+
+  def filter(self, iterator):
+    for framedecorator in iterator:
+      if framedecorator.function() not in self.hidden:
+        yield framedecorator
+
 ################################################################################
 
 def makematcher(klass):
@@ -593,3 +607,5 @@ def new_object_handler(event):
   register_nim_pretty_printers_for_object(event.new_objfile)
 
 gdb.events.new_objfile.connect(new_object_handler)
+
+gdb.frame_filters = {"nim-frame-filter": NimFrameFilter()}