Step through the <compiler-generated> functions via a stop hook in konan_lldb.py

^KT-63598

kotlin-native/llvmDebugInfoC/src/scripts/konan_lldb.py

@@ -627,6 +627,39 @@ class KonanStepOut(KonanStep):
       return self.thread_plan.QueueThreadPlanForStepOut(0)
 
 
+KONAN_LLDB_DONT_SKIP_BRIDGING_FUNCTIONS = 'KONAN_LLDB_DONT_SKIP_BRIDGING_FUNCTIONS'
+MAX_SIZE_FOR_STOP_REASON = 20
+PLAN_FROM_STOP_REASON = {
+    'step in' : KonanStepIn.__name__,
+    'step out' : KonanStepOut.__name__,
+    'step over' : KonanStepOver.__name__,
+}
+
+class KonanHook:
+    def __init__(self, target, extra_args, _):
+        pass
+
+    def handle_stop(self, execution_context, stream) -> bool:
+        is_bridging_functions_skip_enabled = not execution_context.target.GetEnvironment().Get(KONAN_LLDB_DONT_SKIP_BRIDGING_FUNCTIONS)
+
+        def is_kotlin_bridging_function() -> bool:
+            addr = execution_context.frame.addr
+            function_name = addr.function.name
+            if function_name is None:
+                return False
+            file_name = addr.line_entry.file.basename
+            if file_name is None:
+                return False
+            return function_name.startswith('objc2kotlin_') and file_name == '<compiler-generated>'
+
+        if is_bridging_functions_skip_enabled and is_kotlin_bridging_function():
+            stop_reason = execution_context.frame.thread.GetStopDescription(MAX_SIZE_FOR_STOP_REASON)
+            plan = PLAN_FROM_STOP_REASON.get(stop_reason)
+            if plan is not None:
+                execution_context.thread.StepUsingScriptedThreadPlan('{}.{}'.format(__name__, plan))
+        return True
+
+
 def __lldb_init_module(debugger, _):
     log(lambda: "init start")
     __FACTORY['object'] = lambda x, y, z: KonanObjectSyntheticProvider(x, y, z)
@@ -652,4 +685,5 @@ def __lldb_init_module(debugger, _):
     debugger.HandleCommand('command script add -f {}.symbol_by_name_command symbol_by_name'.format(__name__))
     # Avoid Kotlin/Native runtime
     debugger.HandleCommand('settings set target.process.thread.step-avoid-regexp ^::Kotlin_')
+    debugger.HandleCommand('target stop-hook add -P {}.KonanHook'.format(__name__))
     log(lambda: "init end")