xref: /llvm-project/lldb/test/API/commands/command/nested_alias/TestNestedAlias.py (revision 9f0b5f9a39ea6e70c98c69a720d7e4f5d3800bf6) 
1"""
2Test that an alias can reference other aliases without crashing.
3"""
4
5
6
7import lldb
8from lldbsuite.test.lldbtest import *
9import lldbsuite.test.lldbutil as lldbutil
10
11
12class NestedAliasTestCase(TestBase):
13
14    mydir = TestBase.compute_mydir(__file__)
15    NO_DEBUG_INFO_TESTCASE = True
16
17    def setUp(self):
18        # Call super's setUp().
19        TestBase.setUp(self)
20        # Find the line number to break inside main().
21        self.line = line_number('main.cpp', '// break here')
22
23    def test_nested_alias(self):
24        """Test that an alias can reference other aliases without crashing."""
25        self.build()
26        exe = self.getBuildArtifact("a.out")
27        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
28
29        # Break in main() after the variables are assigned values.
30        lldbutil.run_break_set_by_file_and_line(
31            self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)
32
33        self.runCmd("run", RUN_SUCCEEDED)
34
35        # The stop reason of the thread should be breakpoint.
36        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
37                    substrs=['stopped', 'stop reason = breakpoint'])
38
39        # The breakpoint should have a hit count of 1.
40        lldbutil.check_breakpoint(self, bpno = 1, expected_hit_count = 1)
41
42        # This is the function to remove the custom aliases in order to have a
43        # clean slate for the next test case.
44        def cleanup():
45            self.runCmd('command unalias read', check=False)
46            self.runCmd('command unalias rd', check=False)
47            self.runCmd('command unalias fo', check=False)
48            self.runCmd('command unalias foself', check=False)
49
50        # Execute the cleanup function during test case tear down.
51        self.addTearDownHook(cleanup)
52
53        self.runCmd('command alias read memory read -f A')
54        self.runCmd('command alias rd read -c 3')
55
56        self.expect(
57            'memory read -f A -c 3 `&my_ptr[0]`',
58            substrs=[
59                'deadbeef',
60                'main.cpp:',
61                'feedbeef'])
62        self.expect(
63            'rd `&my_ptr[0]`',
64            substrs=[
65                'deadbeef',
66                'main.cpp:',
67                'feedbeef'])
68
69        self.expect(
70            'memory read -f A -c 3 `&my_ptr[0]`',
71            substrs=['deadfeed'],
72            matching=False)
73        self.expect('rd `&my_ptr[0]`', substrs=['deadfeed'], matching=False)
74
75        self.runCmd('command alias fo frame variable -O --')
76        self.runCmd('command alias foself fo self')
77
78        self.expect(
79            'help foself',
80            substrs=[
81                '--show-all-children',
82                '--raw-output'],
83            matching=False)
84        self.expect(
85            'help foself',
86            substrs=[
87                'Show variables for the current',
88                'stack frame.'],
89            matching=True)
90
91        # Check that foself was resolved and is now independent of 'fo'.
92        self.runCmd('command unalias fo')
93        self.expect(
94            'help foself',
95            substrs=[
96                'Show variables for the current',
97                'stack frame.'],
98            matching=True)
99