lldb/test/API/macosx/safe-to-func-call/TestSafeFuncCalls.py

   1 """Test function call thread safety."""
   2
   3
   4 import lldb
   5 from lldbsuite.test.decorators import *
   6 from lldbsuite.test.lldbtest import *
   7 from lldbsuite.test import lldbutil
   8
   9
  10 class TestSafeFuncCalls(TestBase):
  11     @skipUnlessDarwin
  12     @add_test_categories(["pyapi"])
  13     def test_with_python_api(self):
  14         """Test function call thread safety."""
  15         self.build()
  16         exe = self.getBuildArtifact("a.out")
  17
  18         target = self.dbg.CreateTarget(exe)
  19         self.assertTrue(target, VALID_TARGET)
  20         self.main_source_spec = lldb.SBFileSpec("main.c")
  21         break1 = target.BreakpointCreateByName("stopper", "a.out")
  22         self.assertTrue(break1, VALID_BREAKPOINT)
  23         process = target.LaunchSimple(None, None, self.get_process_working_directory())
  24         self.assertTrue(process, PROCESS_IS_VALID)
  25         threads = lldbutil.get_threads_stopped_at_breakpoint(process, break1)
  26         self.assertEqual(len(threads), 1, "Failed to stop at breakpoint 1.")
  27
  28         self.assertEqual(
  29             process.GetNumThreads(),
  30             2,
  31             "Check that the process has two threads when sitting at the stopper() breakpoint",
  32         )
  33
  34         main_thread = lldb.SBThread()
  35         select_thread = lldb.SBThread()
  36         for idx in range(0, process.GetNumThreads()):
  37             t = process.GetThreadAtIndex(idx)
  38             if t.GetName() == "main thread":
  39                 main_thread = t
  40             if t.GetName() == "select thread":
  41                 select_thread = t
  42
  43         self.assertTrue(
  44             main_thread.IsValid() and select_thread.IsValid(),
  45             "Got both expected threads",
  46         )
  47
  48         self.assertTrue(
  49             main_thread.SafeToCallFunctions(),
  50             "It is safe to call functions on the main thread",
  51         )
  52         self.assertFalse(
  53             select_thread.SafeToCallFunctions(),
  54             "It is not safe to call functions on the select thread",
  55         )