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      1 """
      2 Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs
      3 """
      4 
      5 import os, time
      6 import unittest2
      7 import lldb
      8 from lldbtest import *
      9 import lldbutil
     10 
     11 class Rdar10887661TestCase(TestBase):
     12 
     13     mydir = os.path.join("functionalities", "data-formatter", "rdar-10887661")
     14 
     15     # rdar://problem/10887661
     16     @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
     17     @dsym_test
     18     def test_with_dsym_and_run_command(self):
     19         """Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
     20         self.buildDsym()
     21         self.capping_test_commands()
     22 
     23     # rdar://problem/10887661
     24     @dwarf_test
     25     def test_with_dwarf_and_run_command(self):
     26         """Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
     27         self.buildDwarf()
     28         self.capping_test_commands()
     29 
     30     def setUp(self):
     31         # Call super's setUp().
     32         TestBase.setUp(self)
     33         # Find the line number to break at.
     34         self.line = line_number('main.cpp', '// Set break point at this line.')
     35 
     36     def capping_test_commands(self):
     37         """Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
     38         self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
     39 
     40         lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)
     41 
     42         self.runCmd("run", RUN_SUCCEEDED)
     43 
     44         # The stop reason of the thread should be breakpoint.
     45         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
     46             substrs = ['stopped',
     47                        'stop reason = breakpoint'])
     48 
     49         # This is the function to remove the custom formats in order to have a
     50         # clean slate for the next test case.
     51         def cleanup():
     52             self.runCmd('type format clear', check=False)
     53             self.runCmd('type summary clear', check=False)
     54             self.runCmd('type filter clear', check=False)
     55             self.runCmd('type synth clear', check=False)
     56             self.runCmd("settings set target.max-children-count 256", check=False)
     57 
     58         # Execute the cleanup function during test case tear down.
     59         self.addTearDownHook(cleanup)
     60 
     61         # set up the synthetic children provider
     62         self.runCmd("script from fooSynthProvider import *")
     63         self.runCmd("type synth add -l fooSynthProvider foo")
     64 
     65         # check that the synthetic children work, so we know we are doing the right thing
     66         self.expect("frame variable f00_1",
     67                     substrs = ['r = 33',
     68                                'fake_a = 16777216',
     69                                'a = 0']);
     70 
     71         # check that capping works
     72         self.runCmd("settings set target.max-children-count 2", check=False)
     73         
     74         self.expect("frame variable f00_1",
     75                     substrs = ['...',
     76                                'fake_a = 16777216',
     77                                'a = 0']);
     78         
     79         self.expect("frame variable f00_1", matching=False,
     80                     substrs = ['r = 33']);
     81 
     82         
     83         self.runCmd("settings set target.max-children-count 256", check=False)
     84 
     85         self.expect("frame variable f00_1", matching=True,
     86                     substrs = ['r = 33']);
     87 
     88 if __name__ == '__main__':
     89     import atexit
     90     lldb.SBDebugger.Initialize()
     91     atexit.register(lambda: lldb.SBDebugger.Terminate())
     92     unittest2.main()
     93