Add a setting to force stepping to always run all threads.

Also allow ScriptedThreadPlans to set & get their StopOthers
state.

<rdar://problem/64229484>

Differential Revision: https://reviews.llvm.org/D85265

lldb/test/API/functionalities/step_scripted/TestStepScripted.py

@@ -1,7 +1,7 @@
 """
 Tests stepping with scripted thread plans.
 """
-
+import threading
 import lldb
 import lldbsuite.test.lldbutil as lldbutil
 from lldbsuite.test.decorators import *
@@ -111,3 +111,58 @@ class StepScriptedTestCase(TestBase):
 
         # And foo should have changed:
         self.assertTrue(foo_val.GetValueDidChange(), "Foo changed")
+
+    def test_stop_others_from_command(self):
+        """Test that the stop-others flag is set correctly by the command line.
+           Also test that the run-all-threads property overrides this."""
+        self.do_test_stop_others()
+
+    def run_step(self, stop_others_value, run_mode, token):
+        import Steps
+        interp = self.dbg.GetCommandInterpreter()
+        result = lldb.SBCommandReturnObject()
+
+        cmd = "thread step-scripted -C Steps.StepReportsStopOthers -k token -v %s"%(token)
+        if run_mode != None:
+            cmd = cmd + " --run-mode %s"%(run_mode)
+        print(cmd)
+        interp.HandleCommand(cmd, result)
+        self.assertTrue(result.Succeeded(), "Step scripted failed: %s."%(result.GetError()))
+        print(Steps.StepReportsStopOthers.stop_mode_dict)
+        value = Steps.StepReportsStopOthers.stop_mode_dict[token]
+        self.assertEqual(value, stop_others_value, "Stop others has the correct value.")
+        
+    def do_test_stop_others(self):
+        self.build()
+        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
+                                                                            "Set a breakpoint here",
+                                                                            self.main_source_file)
+        # First run with stop others false and see that we got that.
+        thread_id = ""
+        if sys.version_info.major == 2:
+            thread_id = str(threading._get_ident())
+        else:
+            thread_id = str(threading.get_ident())
+
+        # all-threads should set stop others to False.
+        self.run_step(False, "all-threads", thread_id)
+
+        # this-thread should set stop others to True
+        self.run_step(True, "this-thread", thread_id)
+
+        # The default value should be stop others:
+        self.run_step(True, None, thread_id)
+
+        # The target.process.run-all-threads should override this:
+        interp = self.dbg.GetCommandInterpreter()
+        result = lldb.SBCommandReturnObject()
+        
+        interp.HandleCommand("settings set target.process.run-all-threads true", result)
+        self.assertTrue(result.Succeeded, "setting run-all-threads works.")
+
+        self.run_step(False, None, thread_id)
+
+        
+        
+
+