lldb/test/API/commands/command/nested_alias/TestNestedAlias.py

   1 """
   2 Test that an alias can reference other aliases without crashing.
   3 """
   4
   5
   6 import lldb
   7 from lldbsuite.test.lldbtest import *
   8 import lldbsuite.test.lldbutil as lldbutil
   9
  10
  11 class NestedAliasTestCase(TestBase):
  12     NO_DEBUG_INFO_TESTCASE = True
  13
  14     def setUp(self):
  15         # Call super's setUp().
  16         TestBase.setUp(self)
  17         # Find the line number to break inside main().
  18         self.line = line_number("main.cpp", "// break here")
  19
  20     def test_nested_alias(self):
  21         """Test that an alias can reference other aliases without crashing."""
  22         self.build()
  23         exe = self.getBuildArtifact("a.out")
  24         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  25
  26         # Break in main() after the variables are assigned values.
  27         lldbutil.run_break_set_by_file_and_line(
  28             self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True
  29         )
  30
  31         self.runCmd("run", RUN_SUCCEEDED)
  32
  33         # The stop reason of the thread should be breakpoint.
  34         self.expect(
  35             "thread list",
  36             STOPPED_DUE_TO_BREAKPOINT,
  37             substrs=["stopped", "stop reason = breakpoint"],
  38         )
  39
  40         # The breakpoint should have a hit count of 1.
  41         lldbutil.check_breakpoint(self, bpno=1, expected_hit_count=1)
  42
  43         # This is the function to remove the custom aliases in order to have a
  44         # clean slate for the next test case.
  45         def cleanup():
  46             self.runCmd("command unalias read", check=False)
  47             self.runCmd("command unalias rd", check=False)
  48             self.runCmd("command unalias fo", check=False)
  49             self.runCmd("command unalias foself", check=False)
  50             self.runCmd("command unalias add_two", check=False)
  51             self.runCmd("command unalias two", check=False)
  52
  53         # Execute the cleanup function during test case tear down.
  54         self.addTearDownHook(cleanup)
  55
  56         self.runCmd("command alias read memory read -f A")
  57         self.runCmd("command alias rd read -c 3")
  58
  59         self.expect(
  60             "memory read -f A -c 3 `&my_ptr[0]`",
  61             substrs=["deadbeef", "main.cpp:", "feedbeef"],
  62         )
  63         self.expect("rd `&my_ptr[0]`", substrs=["deadbeef", "main.cpp:", "feedbeef"])
  64
  65         self.expect(
  66             "memory read -f A -c 3 `&my_ptr[0]`", substrs=["deadfeed"], matching=False
  67         )
  68         self.expect("rd `&my_ptr[0]`", substrs=["deadfeed"], matching=False)
  69
  70         self.runCmd("command alias fo frame variable -O --")
  71         self.runCmd("command alias foself fo self")
  72
  73         self.expect(
  74             "help foself",
  75             substrs=["--show-all-children", "--raw-output"],
  76             matching=False,
  77         )
  78         self.expect(
  79             "help foself",
  80             substrs=["Show variables for the current", "stack frame."],
  81             matching=True,
  82         )
  83
  84         # Check that foself was resolved and is now independent of 'fo'.
  85         self.runCmd("command unalias fo")
  86         self.expect(
  87             "help foself",
  88             substrs=["Show variables for the current", "stack frame."],
  89             matching=True,
  90         )
  91
  92         # Check that aliases can be created for raw input commands.
  93         self.expect("command alias two expr -- 2")
  94         self.expect("command alias add_two two +")
  95         self.expect("add_two 3", patterns=[" = 5$"])
  96         # Check that aliases to aliases to raw input commands work the second
  97         # and subsequent times.
  98         self.expect("add_two 3", patterns=[" = 5$"])
  99         self.expect("add_two 3", patterns=[" = 5$"])