lldb/packages/Python/lldbsuite/test/lang/mixed/TestMixedLanguages.py

   1 """Test that lldb works correctly on compile units form different languages."""
   2
   3
   4
   5 import re
   6 import lldb
   7 from lldbsuite.test.lldbtest import *
   8
   9
  10 class 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"])