packages/Python/lldbsuite/test/lang/c/tls_globals/TestTlsGlobals.py

   1 """Test that thread-local storage can be read correctly."""
   2
   3 from __future__ import print_function
   4
   5
   6
   7 import unittest2
   8 import os, time
   9 import lldb
  10 from lldbsuite.test.decorators import *
  11 from lldbsuite.test.lldbtest import *
  12 from lldbsuite.test import lldbutil
  13
  14 class TlsGlobalTestCase(TestBase):
  15
  16     mydir = TestBase.compute_mydir(__file__)
  17
  18     def setUp(self):
  19         TestBase.setUp(self)
  20
  21         if self.getPlatform() == "freebsd" or self.getPlatform() == "linux":
  22             # LD_LIBRARY_PATH must be set so the shared libraries are found on startup
  23             if "LD_LIBRARY_PATH" in os.environ:
  24                 self.runCmd("settings set target.env-vars " + self.dylibPath + "=" + os.environ["LD_LIBRARY_PATH"] + ":" + os.getcwd())
  25             else:
  26                 self.runCmd("settings set target.env-vars " + self.dylibPath + "=" + os.getcwd())
  27             self.addTearDownHook(lambda: self.runCmd("settings remove target.env-vars " + self.dylibPath))
  28
  29     @skipIfWindows # TLS works differently on Windows, this would need to be implemented separately.
  30     @expectedFailureAll(bugnumber="llvm.org/pr28392", oslist=no_match(lldbplatformutil.getDarwinOSTriples()))
  31     def test(self):
  32         """Test thread-local storage."""
  33         self.build()
  34         exe = os.path.join(os.getcwd(), "a.out")
  35         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  36
  37         line1 = line_number('main.c', '// thread breakpoint')
  38         lldbutil.run_break_set_by_file_and_line (self, "main.c", line1, num_expected_locations=1, loc_exact=True)
  39         self.runCmd("run", RUN_SUCCEEDED)
  40
  41         # The stop reason of the thread should be breakpoint.
  42         self.runCmd("process status", "Get process status")
  43         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  44             substrs = ['stopped',
  45                        'stop reason = breakpoint'])
  46
  47         # BUG: sometimes lldb doesn't change threads to the stopped thread.
  48         # (unrelated to this test).
  49         self.runCmd("thread select 2", "Change thread")
  50
  51         # Check that TLS evaluates correctly within the thread.
  52         self.expect("expr var_static", VARIABLES_DISPLAYED_CORRECTLY,
  53             patterns = ["\(int\) \$.* = 88"])
  54         self.expect("expr var_shared", VARIABLES_DISPLAYED_CORRECTLY,
  55             patterns = ["\(int\) \$.* = 66"])
  56
  57         # Continue on the main thread
  58         line2 = line_number('main.c', '// main breakpoint')
  59         lldbutil.run_break_set_by_file_and_line (self, "main.c", line2, num_expected_locations=1, loc_exact=True)
  60         self.runCmd("continue", RUN_SUCCEEDED)
  61
  62         # The stop reason of the thread should be breakpoint.
  63         self.runCmd("process status", "Get process status")
  64         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  65             substrs = ['stopped',
  66                        'stop reason = breakpoint'])
  67
  68         # BUG: sometimes lldb doesn't change threads to the stopped thread.
  69         # (unrelated to this test).
  70         self.runCmd("thread select 1", "Change thread")
  71
  72         # Check that TLS evaluates correctly within the main thread.
  73         self.expect("expr var_static", VARIABLES_DISPLAYED_CORRECTLY,
  74             patterns = ["\(int\) \$.* = 44"])
  75         self.expect("expr var_shared", VARIABLES_DISPLAYED_CORRECTLY,
  76             patterns = ["\(int\) \$.* = 33"])