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 import unittest2
   7 import os
   8 import time
   9 import lldb
  10 from lldbsuite.test.decorators import *
  11 from lldbsuite.test.lldbtest import *
  12 from lldbsuite.test import lldbutil
  13
  14
  15 class TlsGlobalTestCase(TestBase):
  16
  17     mydir = TestBase.compute_mydir(__file__)
  18
  19     def setUp(self):
  20         TestBase.setUp(self)
  21
  22         if self.getPlatform() == "freebsd" or self.getPlatform() == "linux":
  23             # LD_LIBRARY_PATH must be set so the shared libraries are found on
  24             # startup
  25             if "LD_LIBRARY_PATH" in os.environ:
  26                 self.runCmd(
  27                     "settings set target.env-vars " +
  28                     self.dylibPath +
  29                     "=" +
  30                     os.environ["LD_LIBRARY_PATH"] +
  31                     ":" +
  32                     os.getcwd())
  33             else:
  34                 self.runCmd("settings set target.env-vars " +
  35                             self.dylibPath + "=" + os.getcwd())
  36             self.addTearDownHook(
  37                 lambda: self.runCmd(
  38                     "settings remove target.env-vars " +
  39                     self.dylibPath))
  40
  41     # TLS works differently on Windows, this would need to be implemented
  42     # separately.
  43     @skipIfWindows
  44     @expectedFailureAll(
  45         bugnumber="llvm.org/pr28392",
  46         oslist=no_match(
  47             lldbplatformutil.getDarwinOSTriples()))
  48     def test(self):
  49         """Test thread-local storage."""
  50         self.build()
  51         exe = os.path.join(os.getcwd(), "a.out")
  52         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  53
  54         line1 = line_number('main.c', '// thread breakpoint')
  55         lldbutil.run_break_set_by_file_and_line(
  56             self, "main.c", line1, num_expected_locations=1, loc_exact=True)
  57         self.runCmd("run", RUN_SUCCEEDED)
  58
  59         # The stop reason of the thread should be breakpoint.
  60         self.runCmd("process status", "Get process status")
  61         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  62                     substrs=['stopped',
  63                              'stop reason = breakpoint'])
  64
  65         # BUG: sometimes lldb doesn't change threads to the stopped thread.
  66         # (unrelated to this test).
  67         self.runCmd("thread select 2", "Change thread")
  68
  69         # Check that TLS evaluates correctly within the thread.
  70         self.expect("expr var_static", VARIABLES_DISPLAYED_CORRECTLY,
  71                     patterns=["\(int\) \$.* = 88"])
  72         self.expect("expr var_shared", VARIABLES_DISPLAYED_CORRECTLY,
  73                     patterns=["\(int\) \$.* = 66"])
  74
  75         # Continue on the main thread
  76         line2 = line_number('main.c', '// main breakpoint')
  77         lldbutil.run_break_set_by_file_and_line(
  78             self, "main.c", line2, num_expected_locations=1, loc_exact=True)
  79         self.runCmd("continue", RUN_SUCCEEDED)
  80
  81         # The stop reason of the thread should be breakpoint.
  82         self.runCmd("process status", "Get process status")
  83         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  84                     substrs=['stopped',
  85                              'stop reason = breakpoint'])
  86
  87         # BUG: sometimes lldb doesn't change threads to the stopped thread.
  88         # (unrelated to this test).
  89         self.runCmd("thread select 1", "Change thread")
  90
  91         # Check that TLS evaluates correctly within the main thread.
  92         self.expect("expr var_static", VARIABLES_DISPLAYED_CORRECTLY,
  93                     patterns=["\(int\) \$.* = 44"])
  94         self.expect("expr var_shared", VARIABLES_DISPLAYED_CORRECTLY,
  95                     patterns=["\(int\) \$.* = 33"])