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      1 """
      2 Test watchpoint modify command to set condition on a watchpoint.
      3 """
      4 
      5 import os, time
      6 import unittest2
      7 import lldb
      8 from lldbtest import *
      9 import lldbutil
     10 
     11 class WatchpointConditionCmdTestCase(TestBase):
     12 
     13     mydir = os.path.join("functionalities", "watchpoint", "watchpoint_commands", "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_with_dsym(self):
     31         """Test watchpoint condition."""
     32         self.buildDsym(dictionary=self.d)
     33         self.setTearDownCleanup(dictionary=self.d)
     34         self.watchpoint_condition()
     35 
     36     @expectedFailureFreeBSD('llvm.org/pr16706') # Watchpoints fail on FreeBSD
     37     @dwarf_test
     38     def test_watchpoint_cond_with_dwarf(self):
     39         """Test watchpoint condition."""
     40         self.buildDwarf(dictionary=self.d)
     41         self.setTearDownCleanup(dictionary=self.d)
     42         self.watchpoint_condition()
     43 
     44     def watchpoint_condition(self):
     45         """Do watchpoint condition 'global==5'."""
     46         exe = os.path.join(os.getcwd(), self.exe_name)
     47         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
     48 
     49         # Add a breakpoint to set a watchpoint when stopped on the breakpoint.
     50         lldbutil.run_break_set_by_file_and_line (self, None, self.line, num_expected_locations=1)
     51 
     52         # Run the program.
     53         self.runCmd("run", RUN_SUCCEEDED)
     54 
     55         # We should be stopped again due to the breakpoint.
     56         # The stop reason of the thread should be breakpoint.
     57         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
     58             substrs = ['stopped',
     59                        'stop reason = breakpoint'])
     60 
     61         # Now let's set a write-type watchpoint for 'global'.
     62         # With a condition of 'global==5'.
     63         self.expect("watchpoint set variable -w write global", WATCHPOINT_CREATED,
     64             substrs = ['Watchpoint created', 'size = 4', 'type = w',
     65                        '%s:%d' % (self.source, self.decl)])
     66 
     67         self.runCmd("watchpoint modify -c 'global==5'")
     68 
     69         # Use the '-v' option to do verbose listing of the watchpoint.
     70         # The hit count should be 0 initially.
     71         self.expect("watchpoint list -v",
     72             substrs = ['hit_count = 0', 'global==5'])
     73 
     74         self.runCmd("process continue")
     75 
     76         # We should be stopped again due to the watchpoint (write type).
     77         # The stop reason of the thread should be watchpoint.
     78         self.expect("thread backtrace", STOPPED_DUE_TO_WATCHPOINT,
     79             substrs = ['stop reason = watchpoint'])
     80         self.expect("frame variable --show-globals global",
     81             substrs = ['(int32_t)', 'global = 5'])
     82 
     83         # Use the '-v' option to do verbose listing of the watchpoint.
     84         # The hit count should now be 2.
     85         self.expect("watchpoint list -v",
     86             substrs = ['hit_count = 5'])
     87 
     88 
     89 if __name__ == '__main__':
     90     import atexit
     91     lldb.SBDebugger.Initialize()
     92     atexit.register(lambda: lldb.SBDebugger.Terminate())
     93     unittest2.main()
     94