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      1 """
      2 Test watchpoint condition API.
      3 """
      4 
      5 import os, time
      6 import unittest2
      7 import lldb
      8 import lldbutil
      9 from lldbtest import *
     10 
     11 class WatchpointConditionAPITestCase(TestBase):
     12 
     13     mydir = os.path.join("python_api", "watchpoint", "condition")
     14 
     15     def setUp(self):
     16         # Call super's setUp().
     17         TestBase.setUp(self)
     18         # Our simple source filename.
     19         self.source = 'main.cpp'
     20         # Find the line number to break inside main().
     21         self.line = line_number(self.source, '// Set break point at this line.')
     22         # And the watchpoint variable declaration line number.
     23         self.decl = line_number(self.source, '// Watchpoint variable declaration.')
     24         # Build dictionary to have unique executable names for each test method.
     25         self.exe_name = self.testMethodName
     26         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
     27 
     28     @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
     29     @dsym_test
     30     def test_watchpoint_cond_api_with_dsym(self):
     31         """Test watchpoint condition API."""
     32         self.buildDsym(dictionary=self.d)
     33         self.setTearDownCleanup(dictionary=self.d)
     34         self.watchpoint_condition_api()
     35 
     36     @expectedFailureFreeBSD('llvm.org/pr16706') # Watchpoints fail on FreeBSD
     37     @dwarf_test
     38     def test_watchpoint_cond_api_with_dwarf(self):
     39         """Test watchpoint condition API."""
     40         self.buildDwarf(dictionary=self.d)
     41         self.setTearDownCleanup(dictionary=self.d)
     42         self.watchpoint_condition_api()
     43 
     44     def watchpoint_condition_api(self):
     45         """Do watchpoint condition API to set condition as 'global==5'."""
     46         exe = os.path.join(os.getcwd(), self.exe_name)
     47 
     48         # Create a target by the debugger.
     49         target = self.dbg.CreateTarget(exe)
     50         self.assertTrue(target, VALID_TARGET)
     51 
     52         # Now create a breakpoint on main.c.
     53         breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
     54         self.assertTrue(breakpoint and
     55                         breakpoint.GetNumLocations() == 1,
     56                         VALID_BREAKPOINT)
     57 
     58         # Now launch the process, and do not stop at the entry point.
     59         process = target.LaunchSimple(None, None, os.getcwd())
     60 
     61         # We should be stopped due to the breakpoint.  Get frame #0.
     62         process = target.GetProcess()
     63         self.assertTrue(process.GetState() == lldb.eStateStopped,
     64                         PROCESS_STOPPED)
     65         thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
     66         frame0 = thread.GetFrameAtIndex(0)
     67 
     68         # Watch 'global' for write.
     69         value = frame0.FindValue('global', lldb.eValueTypeVariableGlobal)
     70         error = lldb.SBError();
     71         watchpoint = value.Watch(True, False, True, error)
     72         self.assertTrue(value and watchpoint,
     73                         "Successfully found the variable and set a watchpoint")
     74         self.DebugSBValue(value)
     75 
     76         # Now set the condition as "global==5".
     77         watchpoint.SetCondition('global==5')
     78         self.expect(watchpoint.GetCondition(), exe=False,
     79             startstr = 'global==5')
     80 
     81         # Hide stdout if not running with '-t' option.
     82         if not self.TraceOn():
     83             self.HideStdout()
     84 
     85         print watchpoint
     86 
     87         # Continue.  Expect the program to stop due to the variable being written to.
     88         process.Continue()
     89 
     90         if (self.TraceOn()):
     91             lldbutil.print_stacktraces(process)
     92 
     93         thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint)
     94         self.assertTrue(thread, "The thread stopped due to watchpoint")
     95         self.DebugSBValue(value)
     96 
     97         # Verify that the condition is met.
     98         self.assertTrue(value.GetValueAsUnsigned() == 5)
     99 
    100 
    101 if __name__ == '__main__':
    102     import atexit
    103     lldb.SBDebugger.Initialize()
    104     atexit.register(lambda: lldb.SBDebugger.Terminate())
    105     unittest2.main()
    106