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1"""Test that anonymous structs/unions are transparent to member access"""
2
3import os, time
4import unittest2
5import lldb
6from lldbtest import *
7import lldbutil
8
9class AnonymousTestCase(TestBase):
10
11    mydir = os.path.join("lang", "c", "anonymous")
12
13    @dsym_test
14    def test_expr_nest_with_dsym(self):
15        self.buildDsym()
16        self.expr_nest()
17
18    @dsym_test
19    def test_expr_child_with_dsym(self):
20        self.buildDsym()
21        self.expr_child()
22
23    @dsym_test
24    def test_expr_grandchild_with_dsym(self):
25        self.buildDsym()
26        self.expr_grandchild()
27
28    @dsym_test
29    def test_expr_parent(self):
30        self.buildDsym()
31        self.expr_parent()
32
33    @unittest2.expectedFailure # llvm.org/pr15591
34    @dsym_test
35    def test_expr_null(self):
36        self.buildDsym()
37        self.expr_null()
38
39    @skipIfGcc # llvm.org/pr15036: LLDB generates an incorrect AST layout for an anonymous struct when DWARF is generated by GCC
40    @skipIfIcc # llvm.org/pr15036: LLDB generates an incorrect AST layout for an anonymous struct when DWARF is generated by ICC
41    @dwarf_test
42    def test_expr_nest_with_dwarf(self):
43        self.buildDwarf()
44        self.expr_nest()
45
46    @dwarf_test
47    def test_expr_child_with_dwarf(self):
48        self.skipTest("Skipped because LLDB asserts due to an incorrect AST layout for an anonymous struct: see llvm.org/pr15036")
49        self.buildDwarf()
50        self.expr_child()
51
52    @skipIfGcc # llvm.org/pr15036: This particular regression was introduced by r181498
53    @skipIfIcc # llvm.org/pr15036: This particular regression was introduced by r181498
54    @dwarf_test
55    def test_expr_grandchild_with_dwarf(self):
56        self.buildDwarf()
57        self.expr_grandchild()
58
59    @dwarf_test
60    def test_expr_parent(self):
61        self.buildDwarf()
62        self.expr_parent()
63
64    @unittest2.expectedFailure # llvm.org/pr15591
65    @dwarf_test
66    def test_expr_null(self):
67        self.buildDwarf()
68        self.expr_null()
69
70    def setUp(self):
71        # Call super's setUp().
72        TestBase.setUp(self)
73        # Find the line numbers to break in main.c.
74        self.line0 = line_number('main.c', '// Set breakpoint 0 here.')
75        self.line1 = line_number('main.c', '// Set breakpoint 1 here.')
76        self.line2 = line_number('main.c', '// Set breakpoint 2 here.')
77
78    def common_setup(self, line):
79        exe = os.path.join(os.getcwd(), "a.out")
80        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
81
82        # Set breakpoints inside and outside methods that take pointers to the containing struct.
83        lldbutil.run_break_set_by_file_and_line (self, "main.c", line, num_expected_locations=1, loc_exact=True)
84
85        self.runCmd("run", RUN_SUCCEEDED)
86
87        # The stop reason of the thread should be breakpoint.
88        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
89            substrs = ['stopped',
90                       'stop reason = breakpoint'])
91
92        # The breakpoint should have a hit count of 1.
93        self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
94            substrs = [' resolved, hit count = 1'])
95
96    def expr_nest(self):
97        self.common_setup(self.line0)
98
99        # These should display correctly.
100        self.expect("expression n->foo.d", VARIABLES_DISPLAYED_CORRECTLY,
101            substrs = ["= 4"])
102
103        self.expect("expression n->b", VARIABLES_DISPLAYED_CORRECTLY,
104            substrs = ["= 2"])
105
106    def expr_child(self):
107        self.common_setup(self.line1)
108
109        # These should display correctly.
110        self.expect("expression c->foo.d", VARIABLES_DISPLAYED_CORRECTLY,
111            substrs = ["= 4"])
112
113        self.expect("expression c->grandchild.b", VARIABLES_DISPLAYED_CORRECTLY,
114            substrs = ["= 2"])
115
116    def expr_grandchild(self):
117        self.common_setup(self.line2)
118
119        # These should display correctly.
120        self.expect("expression g.child.foo.d", VARIABLES_DISPLAYED_CORRECTLY,
121            substrs = ["= 4"])
122
123        self.expect("expression g.child.b", VARIABLES_DISPLAYED_CORRECTLY,
124            substrs = ["= 2"])
125
126    def expr_parent(self):
127        if "clang" in self.getCompiler() and "3.4" in self.getCompilerVersion():
128            self.skipTest("llvm.org/pr16214 -- clang emits partial DWARF for structures referenced via typedef")
129        self.common_setup(self.line2)
130
131        # These should display correctly.
132        self.expect("expression pz", VARIABLES_DISPLAYED_CORRECTLY,
133            substrs = ["(type_z *) $0 = 0x0000"])
134
135        self.expect("expression z.y", VARIABLES_DISPLAYED_CORRECTLY,
136            substrs = ["(type_y) $1 = {"])
137
138        self.expect("expression z", VARIABLES_DISPLAYED_CORRECTLY,
139            substrs = ["dummy = 2"])
140
141    def expr_null(self):
142        self.common_setup(self.line2)
143
144        # This should fail because pz is 0, but it succeeds on OS/X.
145        # This fails on Linux with an upstream error "Couldn't dematerialize struct", as does "p *n" with "int *n = 0".
146        # Note that this can also trigger llvm.org/pr15036 when run interactively at the lldb command prompt.
147        self.expect("expression *(type_z *)pz",
148            substrs = ["Cannot access memory at address 0x0"], error = True)
149
150
151if __name__ == '__main__':
152    import atexit
153    lldb.SBDebugger.Initialize()
154    atexit.register(lambda: lldb.SBDebugger.Terminate())
155    unittest2.main()
156