lldb/test/API/linux/thread/create_during_instruction_step/TestCreateDuringInstructionStep.py

   1 """
   2 This tests that we do not lose control of the inferior, while doing an instruction-level step
   3 over a thread creation instruction.
   4 """
   5
   6
   7 import lldb
   8 from lldbsuite.test.decorators import *
   9 from lldbsuite.test.lldbtest import *
  10 from lldbsuite.test import lldbutil
  11
  12
  13 class CreateDuringInstructionStepTestCase(TestBase):
  14     NO_DEBUG_INFO_TESTCASE = True
  15
  16     @skipUnlessPlatform(["linux"])
  17     @expectedFailureAndroid("llvm.org/pr24737", archs=["arm"])
  18     @skipIf(oslist=["linux"], archs=["arm", "aarch64"], bugnumber="llvm.org/pr24737")
  19     def test_step_inst(self):
  20         self.build()
  21         exe = self.getBuildArtifact("a.out")
  22         target = self.dbg.CreateTarget(exe)
  23         self.assertTrue(target and target.IsValid(), "Target is valid")
  24
  25         # This should create a breakpoint in the stepping thread.
  26         breakpoint = target.BreakpointCreateByName("main")
  27         self.assertTrue(breakpoint and breakpoint.IsValid(), "Breakpoint is valid")
  28
  29         # Run the program.
  30         process = target.LaunchSimple(None, None, self.get_process_working_directory())
  31         self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
  32
  33         # The stop reason of the thread should be breakpoint.
  34         self.assertEqual(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
  35
  36         threads = lldbutil.get_threads_stopped_at_breakpoint(process, breakpoint)
  37         self.assertEqual(len(threads), 1, STOPPED_DUE_TO_BREAKPOINT)
  38
  39         thread = threads[0]
  40         self.assertTrue(thread and thread.IsValid(), "Thread is valid")
  41
  42         # Make sure we see only one threads
  43         self.assertEqual(
  44             process.GetNumThreads(),
  45             1,
  46             "Number of expected threads and actual threads do not match.",
  47         )
  48
  49         # Keep stepping until we see the thread creation
  50         while process.GetNumThreads() < 2:
  51             thread.StepInstruction(False)
  52             self.assertEqual(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
  53             self.assertEqual(
  54                 thread.GetStopReason(),
  55                 lldb.eStopReasonPlanComplete,
  56                 "Step operation succeeded",
  57             )
  58             if self.TraceOn():
  59                 self.runCmd("disassemble --pc")
  60
  61         if self.TraceOn():
  62             self.runCmd("thread list")
  63
  64         # We have successfully caught thread creation. Now just run to
  65         # completion
  66         process.Continue()
  67
  68         # At this point, the inferior process should have exited.
  69         self.assertState(process.GetState(), lldb.eStateExited, PROCESS_EXITED)