packages/Python/lldbsuite/test/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 from __future__ import print_function
   7
   8
   9 import os
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15
  16 class CreateDuringInstructionStepTestCase(TestBase):
  17
  18     mydir = TestBase.compute_mydir(__file__)
  19
  20     def setUp(self):
  21         # Call super's setUp().
  22         TestBase.setUp(self)
  23
  24     @skipUnlessPlatform(['linux'])
  25     @expectedFailureAndroid('llvm.org/pr24737', archs=['arm'])
  26     @expectedFailureAll(
  27         oslist=["linux"],
  28         archs=["arm"],
  29         bugnumber="llvm.org/pr24737")
  30     def test_step_inst(self):
  31         self.build(dictionary=self.getBuildFlags())
  32         exe = os.path.join(os.getcwd(), "a.out")
  33         target = self.dbg.CreateTarget(exe)
  34         self.assertTrue(target and target.IsValid(), "Target is valid")
  35
  36         # This should create a breakpoint in the stepping thread.
  37         breakpoint = target.BreakpointCreateByName("main")
  38         self.assertTrue(
  39             breakpoint and breakpoint.IsValid(),
  40             "Breakpoint is valid")
  41
  42         # Run the program.
  43         process = target.LaunchSimple(
  44             None, None, self.get_process_working_directory())
  45         self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
  46
  47         # The stop reason of the thread should be breakpoint.
  48         self.assertEqual(
  49             process.GetState(),
  50             lldb.eStateStopped,
  51             PROCESS_STOPPED)
  52
  53         threads = lldbutil.get_threads_stopped_at_breakpoint(
  54             process, breakpoint)
  55         self.assertEqual(len(threads), 1, STOPPED_DUE_TO_BREAKPOINT)
  56
  57         thread = threads[0]
  58         self.assertTrue(thread and thread.IsValid(), "Thread is valid")
  59
  60         # Make sure we see only one threads
  61         self.assertEqual(
  62             process.GetNumThreads(),
  63             1,
  64             'Number of expected threads and actual threads do not match.')
  65
  66         # Keep stepping until we see the thread creation
  67         while process.GetNumThreads() < 2:
  68             thread.StepInstruction(False)
  69             self.assertEqual(
  70                 process.GetState(),
  71                 lldb.eStateStopped,
  72                 PROCESS_STOPPED)
  73             self.assertEqual(
  74                 thread.GetStopReason(),
  75                 lldb.eStopReasonPlanComplete,
  76                 "Step operation succeeded")
  77             if self.TraceOn():
  78                 self.runCmd("disassemble --pc")
  79
  80         if self.TraceOn():
  81             self.runCmd("thread list")
  82
  83         # We have successfully caught thread creation. Now just run to
  84         # completion
  85         process.Continue()
  86
  87         # At this point, the inferior process should have exited.
  88         self.assertEqual(process.GetState(), lldb.eStateExited, PROCESS_EXITED)