[lldb] Verify target stop-hooks support with scripted process (#91107)

This patch makes sure that scripted process are compatible with target
stop-hooks. This wasn't tested in the past, but it turned out to be
working out of the box.

rdar://124396534

Signed-off-by: Med Ismail Bennani <[email protected]>

Author: medismailben

lldb/test/API/functionalities/scripted_process/TestScriptedProcess.py

@@ -187,6 +187,10 @@ def cleanup():
             + os.path.join(self.getSourceDir(), scripted_process_example_relpath)
         )
 
+        self.runCmd(
+            "target stop-hook add -k first -v 1 -k second -v 2 -P dummy_scripted_process.DummyStopHook"
+        )
+
         launch_info = lldb.SBLaunchInfo(None)
         launch_info.SetProcessPluginName("ScriptedProcess")
         launch_info.SetScriptedProcessClassName(
@@ -207,6 +211,9 @@ def cleanup():
         self.assertTrue(hasattr(py_impl, "my_super_secret_member"))
         self.assertEqual(py_impl.my_super_secret_method(), 42)
 
+        self.assertTrue(hasattr(py_impl, "handled_stop"))
+        self.assertTrue(py_impl.handled_stop)
+
         # Try reading from target #0 process ...
         addr = 0x500000000
         message = "Hello, target 0"

lldb/test/API/functionalities/scripted_process/dummy_scripted_process.py

@@ -7,6 +7,16 @@
 from lldb.plugins.scripted_process import ScriptedThread
 
 
+class DummyStopHook:
+    def __init__(self, target, args, internal_dict):
+        self.target = target
+        self.args = args
+
+    def handle_stop(self, exe_ctx, stream):
+        print("My DummyStopHook triggered. Printing args: \n%s" % self.args)
+        sp = exe_ctx.process.GetScriptedImplementation()
+        sp.handled_stop = True
+
 class DummyScriptedProcess(ScriptedProcess):
     memory = None
 
@@ -18,6 +28,7 @@ def __init__(self, exe_ctx: lldb.SBExecutionContext, args: lldb.SBStructuredData
         debugger = self.target.GetDebugger()
         index = debugger.GetIndexOfTarget(self.target)
         self.memory[addr] = "Hello, target " + str(index)
+        self.handled_stop = False
 
     def read_memory_at_address(
         self, addr: int, size: int, error: lldb.SBError
@@ -99,7 +110,13 @@ def get_register_context(self) -> str:
 
 
 def __lldb_init_module(debugger, dict):
+    # This is used when loading the script in an interactive debug session to
+    # automatically, register the stop-hook and launch the scripted process.
     if not "SKIP_SCRIPTED_PROCESS_LAUNCH" in os.environ:
+        debugger.HandleCommand(
+            "target stop-hook add -k first -v 1 -k second -v 2 -P %s.%s"
+            % (__name__, DummyStopHook.__name__)
+        )
         debugger.HandleCommand(
             "process launch -C %s.%s" % (__name__, DummyScriptedProcess.__name__)
         )
@@ -108,3 +125,7 @@ def __lldb_init_module(debugger, dict):
             "Name of the class that will manage the scripted process: '%s.%s'"
             % (__name__, DummyScriptedProcess.__name__)
         )
+        print(
+            "Name of the class that will manage the stop-hook: '%s.%s'"
+            % (__name__, DummyStopHook.__name__)
+        )