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