lldb/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
   7
   8 import lldb
   9 from lldbsuite.test.decorators import *
  10 from lldbsuite.test.lldbtest import *
  11 from lldbsuite.test import lldbutil
  12
  13
  14 class BuiltinTrapTestCase(TestBase):
  15
  16     mydir = TestBase.compute_mydir(__file__)
  17
  18     def setUp(self):
  19         # Call super's setUp().
  20         TestBase.setUp(self)
  21         # Find the line number to break at.
  22         self.line = line_number('main.cpp', '// Set break point at this line.')
  23
  24     # gcc generates incorrect linetable
  25     @expectedFailureAll(archs="arm", compiler="gcc", triple=".*-android")
  26     @expectedFailureAll(oslist=['linux'], archs=['arm', 'aarch64'])
  27     @skipIfWindows
  28     def test_with_run_command(self):
  29         """Test that LLDB handles a function with __builtin_trap correctly."""
  30         self.build()
  31         self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
  32
  33         lldbutil.run_break_set_by_file_and_line(self, "main.cpp", self.line,
  34                                                 num_expected_locations=1,
  35                                                 loc_exact=True)
  36
  37         self.runCmd("run", RUN_SUCCEEDED)
  38
  39         # The stop reason of the thread should be breakpoint.
  40         self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
  41                     substrs=['stopped',
  42                              'stop reason = breakpoint'])
  43
  44         # print backtrace, expect both 'bar' and 'main' functions to be listed
  45         self.expect('bt', substrs=['bar', 'main'])
  46
  47         # go up one frame
  48         self.runCmd("up", RUN_SUCCEEDED)
  49
  50         # evaluate a local
  51         self.expect('p foo', substrs=['= 5'])