packages/Python/lldbsuite/test/functionalities/watchpoint/hello_watchpoint/TestMyFirstWatchpoint.py

   1 """
   2 Test my first lldb watchpoint.
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8 import os
   9 import time
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15
  16 class HelloWatchpointTestCase(TestBase):
  17
  18     def getCategories(self):
  19         return ['basic_process']
  20
  21     mydir = TestBase.compute_mydir(__file__)
  22
  23     def setUp(self):
  24         # Call super's setUp().
  25         TestBase.setUp(self)
  26         # Our simple source filename.
  27         self.source = 'main.c'
  28         # Find the line number to break inside main().
  29         self.line = line_number(
  30             self.source, '// Set break point at this line.')
  31         # And the watchpoint variable declaration line number.
  32         self.decl = line_number(self.source,
  33                                 '// Watchpoint variable declaration.')
  34         self.exe_name = 'a.out'
  35         self.d = {'C_SOURCES': self.source, 'EXE': self.exe_name}
  36
  37     # Watchpoints not supported
  38     @expectedFailureAndroid(archs=['arm', 'aarch64'])
  39     @expectedFailureAll(
  40         oslist=["windows"],
  41         bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows")
  42     def test_hello_watchpoint_using_watchpoint_set(self):
  43         """Test a simple sequence of watchpoint creation and watchpoint hit."""
  44         self.build(dictionary=self.d)
  45         self.setTearDownCleanup(dictionary=self.d)
  46
  47         exe = os.path.join(os.getcwd(), self.exe_name)
  48         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  49
  50         # Add a breakpoint to set a watchpoint when stopped on the breakpoint.
  51         lldbutil.run_break_set_by_file_and_line(
  52             self, None, self.line, num_expected_locations=1)
  53
  54         # Run the program.
  55         self.runCmd("run", RUN_SUCCEEDED)
  56
  57         # We should be stopped again due to the breakpoint.
  58         # The stop reason of the thread should be breakpoint.
  59         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  60                     substrs=['stopped',
  61                              'stop reason = breakpoint'])
  62
  63         # Now let's set a write-type watchpoint for 'global'.
  64         # There should be only one watchpoint hit (see main.c).
  65         self.expect(
  66             "watchpoint set variable -w write global",
  67             WATCHPOINT_CREATED,
  68             substrs=[
  69                 'Watchpoint created',
  70                 'size = 4',
  71                 'type = w',
  72                 '%s:%d' %
  73                 (self.source,
  74                  self.decl)])
  75
  76         # Use the '-v' option to do verbose listing of the watchpoint.
  77         # The hit count should be 0 initially.
  78         self.expect("watchpoint list -v",
  79                     substrs=['hit_count = 0'])
  80
  81         self.runCmd("process continue")
  82
  83         # We should be stopped again due to the watchpoint (write type), but
  84         # only once.  The stop reason of the thread should be watchpoint.
  85         self.expect("thread list", STOPPED_DUE_TO_WATCHPOINT,
  86                     substrs=['stopped',
  87                              'stop reason = watchpoint'])
  88
  89         self.runCmd("process continue")
  90
  91         # Don't expect the read of 'global' to trigger a stop exception.
  92         process = self.dbg.GetSelectedTarget().GetProcess()
  93         if process.GetState() == lldb.eStateStopped:
  94             self.assertFalse(
  95                 lldbutil.get_stopped_thread(
  96                     process, lldb.eStopReasonWatchpoint))
  97
  98         # Use the '-v' option to do verbose listing of the watchpoint.
  99         # The hit count should now be 1.
 100         self.expect("watchpoint list -v",
 101                     substrs=['hit_count = 1'])