lldb/test/API/lang/objc/objc-checker/TestObjCCheckers.py

   1 """
   2 Use lldb Python API to make sure the dynamic checkers are doing their jobs.
   3 """
   4
   5
   6 import lldb
   7 from lldbsuite.test.decorators import *
   8 from lldbsuite.test.lldbtest import *
   9 from lldbsuite.test import lldbutil
  10
  11
  12 class ObjCCheckerTestCase(TestBase):
  13     NO_DEBUG_INFO_TESTCASE = True
  14
  15     def setUp(self):
  16         # Call super's setUp().
  17         TestBase.setUp(self)
  18
  19         # Find the line number to break for main.c.
  20         self.source_name = "main.m"
  21
  22     @add_test_categories(["pyapi"])
  23     def test_objc_checker(self):
  24         """Test that checkers catch unrecognized selectors"""
  25         if self.getArchitecture() == "i386":
  26             self.skipTest("requires Objective-C 2.0 runtime")
  27
  28         self.build()
  29         exe = self.getBuildArtifact("a.out")
  30
  31         # Create a target from the debugger.
  32
  33         target = self.dbg.CreateTarget(exe)
  34         self.assertTrue(target, VALID_TARGET)
  35
  36         # Set up our breakpoints:
  37
  38         main_bkpt = target.BreakpointCreateBySourceRegex(
  39             "Set a breakpoint here.", lldb.SBFileSpec(self.source_name)
  40         )
  41         self.assertTrue(
  42             main_bkpt and main_bkpt.GetNumLocations() == 1, VALID_BREAKPOINT
  43         )
  44
  45         # Now launch the process, and do not stop at the entry point.
  46         process = target.LaunchSimple(None, None, self.get_process_working_directory())
  47
  48         self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
  49
  50         threads = lldbutil.get_threads_stopped_at_breakpoint(process, main_bkpt)
  51         self.assertEqual(len(threads), 1)
  52         thread = threads[0]
  53
  54         #
  55         #  The class Simple doesn't have a count method.  Make sure that we don't
  56         #  actually try to send count but catch it as an unrecognized selector.
  57
  58         frame = thread.GetFrameAtIndex(0)
  59         expr_value = frame.EvaluateExpression("(int) [my_simple count]", False)
  60         expr_error = expr_value.GetError()
  61
  62         self.assertTrue(expr_error.Fail())
  63
  64         # Make sure the call produced no NSLog stdout.
  65         stdout = process.GetSTDOUT(100)
  66         self.assertTrue(stdout is None or (len(stdout) == 0))
  67
  68         # Make sure the error is helpful:
  69         err_string = expr_error.GetCString()
  70         self.assertIn("selector", err_string)
  71
  72         #
  73         # Check that we correctly insert the checker for an
  74         # ObjC method with the struct return convention.
  75         # Getting this wrong would cause us to call the checker
  76         # with the wrong arguments, and the checker would crash
  77         # So I'm just checking "expression runs successfully" here:
  78         #
  79         expr_value = frame.EvaluateExpression("[my_simple getBigStruct]", False)
  80         expr_error = expr_value.GetError()
  81
  82         self.assertSuccess(expr_error)