lldb/test/API/lang/mixed/TestMixedLanguages.py

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