packages/Python/lldbsuite/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py

   1 """
   2 Test that expr will time out and allow other threads to run if it blocks.
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8 import os
   9 import time
  10 import re
  11 import lldb
  12 from lldbsuite.test.decorators import *
  13 from lldbsuite.test.lldbtest import *
  14 from lldbsuite.test import lldbutil
  15
  16
  17 class ExprDoesntDeadlockTestCase(TestBase):
  18
  19     def getCategories(self):
  20         return ['basic_process']
  21
  22     mydir = TestBase.compute_mydir(__file__)
  23
  24     @expectedFailureAll(oslist=['freebsd'], bugnumber='llvm.org/pr17946')
  25     @expectedFailureAll(
  26         oslist=["windows"],
  27         bugnumber="Windows doesn't have pthreads, test needs to be ported")
  28     def test_with_run_command(self):
  29         """Test that expr will time out and allow other threads to run if it blocks."""
  30         self.build()
  31         exe = os.path.join(os.getcwd(), "a.out")
  32
  33         # Create a target by the debugger.
  34         target = self.dbg.CreateTarget(exe)
  35         self.assertTrue(target, VALID_TARGET)
  36
  37         # Now create a breakpoint at source line before call_me_to_get_lock
  38         # gets called.
  39
  40         main_file_spec = lldb.SBFileSpec("locking.c")
  41         breakpoint = target.BreakpointCreateBySourceRegex(
  42             'Break here', main_file_spec)
  43         if self.TraceOn():
  44             print("breakpoint:", breakpoint)
  45         self.assertTrue(breakpoint and
  46                         breakpoint.GetNumLocations() == 1,
  47                         VALID_BREAKPOINT)
  48
  49         # Now launch the process, and do not stop at entry point.
  50         process = target.LaunchSimple(
  51             None, None, self.get_process_working_directory())
  52         self.assertTrue(process, PROCESS_IS_VALID)
  53
  54         # Frame #0 should be on self.line1 and the break condition should hold.
  55         from lldbsuite.test.lldbutil import get_stopped_thread
  56         thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
  57         self.assertTrue(
  58             thread.IsValid(),
  59             "There should be a thread stopped due to breakpoint condition")
  60
  61         frame0 = thread.GetFrameAtIndex(0)
  62
  63         var = frame0.EvaluateExpression("call_me_to_get_lock()")
  64         self.assertTrue(var.IsValid())
  65         self.assertTrue(var.GetValueAsSigned(0) == 567)