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   1 """
   2 Test watchpoint condition API.
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8 import lldb
   9 from lldbsuite.test.decorators import *
  10 from lldbsuite.test.lldbtest import *
  11 from lldbsuite.test import lldbutil
  12
  13
  14 class WatchpointConditionAPITestCase(TestBase):
  15
  16     mydir = TestBase.compute_mydir(__file__)
  17     NO_DEBUG_INFO_TESTCASE = True
  18
  19     def setUp(self):
  20         # Call super's setUp().
  21         TestBase.setUp(self)
  22         # Our simple source filename.
  23         self.source = 'main.cpp'
  24         # Find the line number to break inside main().
  25         self.line = line_number(
  26             self.source, '// Set break point at this line.')
  27         # And the watchpoint variable declaration line number.
  28         self.decl = line_number(self.source,
  29                                 '// Watchpoint variable declaration.')
  30         # Build dictionary to have unique executable names for each test
  31         # method.
  32         self.exe_name = self.testMethodName
  33         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
  34
  35     def test_watchpoint_cond_api(self):
  36         """Test watchpoint condition API."""
  37         self.build(dictionary=self.d)
  38         self.setTearDownCleanup(dictionary=self.d)
  39         exe = self.getBuildArtifact(self.exe_name)
  40
  41         # Create a target by the debugger.
  42         target = self.dbg.CreateTarget(exe)
  43         self.assertTrue(target, VALID_TARGET)
  44
  45         # Now create a breakpoint on main.c.
  46         breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
  47         self.assertTrue(breakpoint and
  48                         breakpoint.GetNumLocations() == 1,
  49                         VALID_BREAKPOINT)
  50
  51         # Now launch the process, and do not stop at the entry point.
  52         process = target.LaunchSimple(
  53             None, None, self.get_process_working_directory())
  54
  55         # We should be stopped due to the breakpoint.  Get frame #0.
  56         process = target.GetProcess()
  57         self.assertTrue(process.GetState() == lldb.eStateStopped,
  58                         PROCESS_STOPPED)
  59         thread = lldbutil.get_stopped_thread(
  60             process, lldb.eStopReasonBreakpoint)
  61         frame0 = thread.GetFrameAtIndex(0)
  62
  63         # Watch 'global' for write.
  64         value = frame0.FindValue('global', lldb.eValueTypeVariableGlobal)
  65         error = lldb.SBError()
  66         watchpoint = value.Watch(True, False, True, error)
  67         self.assertTrue(value and watchpoint,
  68                         "Successfully found the variable and set a watchpoint")
  69         self.DebugSBValue(value)
  70
  71         # Now set the condition as "global==5".
  72         watchpoint.SetCondition('global==5')
  73         self.expect(watchpoint.GetCondition(), exe=False,
  74                     startstr='global==5')
  75
  76         # Hide stdout if not running with '-t' option.
  77         if not self.TraceOn():
  78             self.HideStdout()
  79
  80         print(watchpoint)
  81
  82         # Continue.  Expect the program to stop due to the variable being
  83         # written to.
  84         process.Continue()
  85
  86         if (self.TraceOn()):
  87             lldbutil.print_stacktraces(process)
  88
  89         thread = lldbutil.get_stopped_thread(
  90             process, lldb.eStopReasonWatchpoint)
  91         self.assertTrue(thread, "The thread stopped due to watchpoint")
  92         self.DebugSBValue(value)
  93
  94         # Verify that the condition is met.
  95         self.assertTrue(value.GetValueAsUnsigned() == 5)