94 lines · python
1"""2Use lldb Python SBWatchpoint API to set the ignore count.3"""4 5import lldb6from lldbsuite.test.decorators import *7from lldbsuite.test.lldbtest import *8from lldbsuite.test import lldbutil9 10 11class WatchpointIgnoreCountTestCase(TestBase):12 NO_DEBUG_INFO_TESTCASE = True13 14 def setUp(self):15 # Call super's setUp().16 TestBase.setUp(self)17 # Our simple source filename.18 self.source = "main.c"19 # Find the line number to break inside main().20 self.line = line_number(self.source, "// Set break point at this line.")21 22 # on arm64 targets, lldb has incorrect hit-count / ignore-counts23 # for watchpoints when they are hit with multiple threads at24 # the same time. Tracked as llvm.org/pr4943325 # or rdar://93863107 inside Apple.26 def affected_by_radar_93863107(self):27 return (28 self.getArchitecture() in ["arm64", "arm64e"]29 ) and self.platformIsDarwin()30 31 # Read-write watchpoints not supported on SystemZ32 @expectedFailureAll(archs=["s390x"])33 def test_set_watch_ignore_count(self):34 """Test SBWatchpoint.SetIgnoreCount() API."""35 self.build()36 exe = self.getBuildArtifact("a.out")37 38 # Create a target by the debugger.39 target = self.dbg.CreateTarget(exe)40 self.assertTrue(target, VALID_TARGET)41 42 # Create a breakpoint on main.c in order to set our watchpoint later.43 breakpoint = target.BreakpointCreateByLocation(self.source, self.line)44 self.assertTrue(45 breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT46 )47 48 # Now launch the process, and do not stop at the entry point.49 process = target.LaunchSimple(None, None, self.get_process_working_directory())50 51 # We should be stopped due to the breakpoint. Get frame #0.52 process = target.GetProcess()53 self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)54 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)55 frame0 = thread.GetFrameAtIndex(0)56 57 # Watch 'global' for read and write.58 value = frame0.FindValue("global", lldb.eValueTypeVariableGlobal)59 error = lldb.SBError()60 watchpoint = value.Watch(True, True, True, error)61 self.assertTrue(62 value and watchpoint, "Successfully found the variable and set a watchpoint"63 )64 self.DebugSBValue(value)65 66 # Hide stdout if not running with '-t' option.67 if not self.TraceOn():68 self.HideStdout()69 70 # There should be only 1 watchpoint location under the target.71 self.assertEqual(target.GetNumWatchpoints(), 1)72 watchpoint = target.GetWatchpointAtIndex(0)73 self.assertTrue(watchpoint.IsEnabled())74 self.assertEqual(watchpoint.GetIgnoreCount(), 0)75 watch_id = watchpoint.GetID()76 self.assertNotEqual(watch_id, 0)77 print(watchpoint)78 79 # Now immediately set the ignore count to 2. When we continue, expect the80 # inferior to run to its completion without stopping due to watchpoint.81 watchpoint.SetIgnoreCount(2)82 print(watchpoint)83 process.Continue()84 85 # At this point, the inferior process should have exited.86 self.assertState(process.GetState(), lldb.eStateExited, PROCESS_EXITED)87 88 # Verify some vital statistics.89 self.assertTrue(watchpoint)90 self.assertEqual(watchpoint.GetWatchSize(), 4)91 if not self.affected_by_radar_93863107():92 self.assertEqual(watchpoint.GetHitCount(), 2)93 print(watchpoint)94