packages/Python/lldbsuite/test/linux/builtin_trap/TestBuiltinTrap.py

   1 """
   2 Test lldb ability to unwind a stack with a function containing a call to the
   3 '__builtin_trap' intrinsic, which GCC (4.6) encodes to an illegal opcode.
   4 """
   5
   6 from __future__ import print_function
   7
   8
   9 import os
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15
  16 class BuiltinTrapTestCase(TestBase):
  17
  18     mydir = TestBase.compute_mydir(__file__)
  19
  20     def setUp(self):
  21         # Call super's setUp().
  22         TestBase.setUp(self)
  23         # Find the line number to break at.
  24         self.line = line_number('main.cpp', '// Set break point at this line.')
  25
  26     # gcc generates incorrect linetable
  27     @expectedFailureAll(archs="arm", compiler="gcc", triple=".*-android")
  28     @expectedFailureAll(oslist=['linux'], archs=['arm'])
  29     @skipIfWindows
  30     def test_with_run_command(self):
  31         """Test that LLDB handles a function with __builtin_trap correctly."""
  32         self.build()
  33         self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
  34
  35         lldbutil.run_break_set_by_file_and_line(self, "main.cpp", self.line,
  36                                                 num_expected_locations=1,
  37                                                 loc_exact=True)
  38
  39         self.runCmd("run", RUN_SUCCEEDED)
  40
  41         # The stop reason of the thread should be breakpoint.
  42         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  43                     substrs=['stopped',
  44                              'stop reason = breakpoint'])
  45
  46         # print backtrace, expect both 'bar' and 'main' functions to be listed
  47         self.expect('bt', substrs=['bar', 'main'])
  48
  49         # go up one frame
  50         self.runCmd("up", RUN_SUCCEEDED)
  51
  52         # evaluate a local
  53         self.expect('p foo', substrs=['= 5'])