packages/Python/lldbsuite/test/python_api/watchpoint/condition/TestWatchpointConditionAPI.py

   1 """
   2 Test watchpoint condition API.
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8
   9 import os, time
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15 class WatchpointConditionAPITestCase(TestBase):
  16
  17     mydir = TestBase.compute_mydir(__file__)
  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(self.source, '// Set break point at this line.')
  26         # And the watchpoint variable declaration line number.
  27         self.decl = line_number(self.source, '// Watchpoint variable declaration.')
  28         # Build dictionary to have unique executable names for each test method.
  29         self.exe_name = self.testMethodName
  30         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
  31
  32     @expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported
  33     @expectedFailureAll(oslist=["linux"], archs=["aarch64"], bugnumber="llvm.org/pr27710")
  34     @skipIfWindows # Watchpoints not supported on Windows, and this test hangs
  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 = os.path.join(os.getcwd(), 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 (None, None, self.get_process_working_directory())
  53
  54         # We should be stopped due to the breakpoint.  Get frame #0.
  55         process = target.GetProcess()
  56         self.assertTrue(process.GetState() == lldb.eStateStopped,
  57                         PROCESS_STOPPED)
  58         thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
  59         frame0 = thread.GetFrameAtIndex(0)
  60
  61         # Watch 'global' for write.
  62         value = frame0.FindValue('global', lldb.eValueTypeVariableGlobal)
  63         error = lldb.SBError();
  64         watchpoint = value.Watch(True, False, True, error)
  65         self.assertTrue(value and watchpoint,
  66                         "Successfully found the variable and set a watchpoint")
  67         self.DebugSBValue(value)
  68
  69         # Now set the condition as "global==5".
  70         watchpoint.SetCondition('global==5')
  71         self.expect(watchpoint.GetCondition(), exe=False,
  72             startstr = 'global==5')
  73
  74         # Hide stdout if not running with '-t' option.
  75         if not self.TraceOn():
  76             self.HideStdout()
  77
  78         print(watchpoint)
  79
  80         # Continue.  Expect the program to stop due to the variable being written to.
  81         process.Continue()
  82
  83         if (self.TraceOn()):
  84             lldbutil.print_stacktraces(process)
  85
  86         thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint)
  87         self.assertTrue(thread, "The thread stopped due to watchpoint")
  88         self.DebugSBValue(value)
  89
  90         # Verify that the condition is met.
  91         self.assertTrue(value.GetValueAsUnsigned() == 5)