| """ |
| Test lldb ability to unwind a stack with a function containing a call to the |
| '__builtin_trap' intrinsic, which GCC (4.6) encodes to an illegal opcode. |
| """ |
| |
| import os |
| import unittest2 |
| import lldb |
| from lldbtest import * |
| import lldbutil |
| |
| class BuiltinTrapTestCase(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") |
| @dsym_test |
| def test_with_dsym_and_run_command(self): |
| """Test that LLDB handles a function with __builtin_trap correctly.""" |
| self.buildDsym() |
| self.builtin_trap_unwind() |
| |
| @dwarf_test |
| @expectedFailureGcc # llvm.org/pr15936: LLDB is omits a function that contains an |
| # illegal opcode from backtraces. This |
| # failure is GCC 4.6 specific. |
| def test_with_dwarf_and_run_command(self): |
| """Test that LLDB handles a function with __builtin_trap correctly.""" |
| self.buildDwarf() |
| self.builtin_trap_unwind() |
| |
| def setUp(self): |
| # Call super's setUp(). |
| TestBase.setUp(self) |
| # Find the line number to break at. |
| self.line = line_number('main.cpp', '// Set break point at this line.') |
| |
| def builtin_trap_unwind(self): |
| """Test that LLDB handles unwinding a frame that contains a function |
| with a __builtin_trap intrinsic. |
| """ |
| self.runCmd("file a.out", CURRENT_EXECUTABLE_SET) |
| |
| lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, |
| num_expected_locations=1, |
| loc_exact=True) |
| |
| self.runCmd("run", RUN_SUCCEEDED) |
| |
| # The stop reason of the thread should be breakpoint. |
| self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, |
| substrs = ['stopped', |
| 'stop reason = breakpoint']) |
| |
| # print backtrace, expect both 'bar' and 'main' functions to be listed |
| self.expect('bt', substrs = ['bar', 'main']) |
| |
| # go up one frame |
| self.runCmd("up", RUN_SUCCEEDED) |
| |
| # evaluate a local |
| self.expect('p foo', substrs = ['= 5']) |
| |
| |
| |
| if __name__ == '__main__': |
| import atexit |
| lldb.SBDebugger.Initialize() |
| atexit.register(lambda: lldb.SBDebugger.Terminate()) |
| unittest2.main() |