1"""Test that lldb works correctly on compile units form different languages."""
2
3
4
5import re
6import lldb
7from lldbsuite.test.lldbtest import *
8
9
10class MixedLanguagesTestCase(TestBase):
11
12    mydir = TestBase.compute_mydir(__file__)
13
14    def test_language_of_frame(self):
15        """Test that the language defaults to the language of the current frame."""
16        self.build()
17        exe = self.getBuildArtifact("a.out")
18        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
19
20        # Execute the cleanup function during test case tear down
21        # to restore the frame format.
22        def cleanup():
23            self.runCmd(
24                "settings set frame-format %s" %
25                self.format_string, check=False)
26        self.addTearDownHook(cleanup)
27        self.runCmd("settings show frame-format")
28        m = re.match(
29            '^frame-format \(format-string\) = "(.*)\"$',
30            self.res.GetOutput())
31        self.assertTrue(m, "Bad settings string")
32        self.format_string = m.group(1)
33
34        # Change the default format to print the language.
35        format_string = "frame #${frame.index}: ${frame.pc}{ ${module.file.basename}\`${function.name}{${function.pc-offset}}}{, lang=${language}}\n"
36        self.runCmd("settings set frame-format %s" % format_string)
37        self.expect("settings show frame-format", SETTING_MSG("frame-format"),
38                    substrs=[format_string])
39
40        # Run to BP at main (in main.c) and test that the language is C.
41        self.runCmd("breakpoint set -n main")
42        self.runCmd("run")
43        self.expect("thread backtrace",
44                    substrs=["`main", "lang=c"])
45        # Make sure evaluation of C++11 fails.
46        self.expect("expr foo != nullptr", error=True,
47                    startstr="error")
48
49        # Run to BP at foo (in foo.cpp) and test that the language is C++.
50        self.runCmd("breakpoint set -n foo")
51        self.runCmd("continue")
52        self.expect("thread backtrace",
53                    substrs=["`::foo()", "lang=c++"])
54        # Make sure we can evaluate an expression requiring C++11
55        # (note: C++11 is enabled by default for C++).
56        self.expect("expr foo != nullptr",
57                    patterns=["true"])
58