| """Test that backtraces can follow cross-object tail calls""" |
| |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class TestCrossObjectTailCalls(TestBase): |
| @skipIf(compiler="clang", compiler_version=["<", "10.0"]) |
| @skipIf(dwarf_version=["<", "4"]) |
| @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr26265") |
| @expectedFailureAll(archs=["arm", "aarch64"], bugnumber="llvm.org/PR44561") |
| def test_cross_object_tail_calls(self): |
| self.build() |
| exe = self.getBuildArtifact("a.out") |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| lldbutil.run_break_set_by_source_regexp( |
| self, "// break here", extra_options="-f Two.c" |
| ) |
| |
| process = target.LaunchSimple(None, None, self.get_process_working_directory()) |
| self.assertTrue(process, PROCESS_IS_VALID) |
| |
| # We should be stopped in the second dylib. |
| thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint) |
| |
| # Debug helper: |
| # self.runCmd("log enable -f /tmp/lldb.log lldb step") |
| # self.runCmd("bt") |
| |
| # Check that the backtrace is what we expect: |
| # frame #0: 0x000000010be73f94 a.out`tail_called_in_b_from_b at Two.c:7:3 [opt] |
| # frame #1: 0x000000010be73fa0 a.out`tail_called_in_b_from_a at Two.c:8:1 [opt] [artificial] |
| # frame #2: 0x000000010be73f80 a.out`helper_in_a at One.c:11:1 [opt] [artificial] |
| # frame #3: 0x000000010be73f79 a.out`tail_called_in_a_from_main at One.c:10:3 [opt] |
| # frame #4: 0x000000010be73f60 a.out`helper at main.c:11:3 [opt] [artificial] |
| # frame #5: 0x000000010be73f59 a.out`main at main.c:10:3 [opt] |
| expected_frames = [ |
| ("tail_called_in_b_from_b", False), |
| ("tail_called_in_b_from_a", True), |
| ("helper_in_a", True), |
| ("tail_called_in_a_from_main", False), |
| ("helper", True), |
| ("main", False), |
| ] |
| for idx, (name, is_artificial) in enumerate(expected_frames): |
| frame = thread.GetFrameAtIndex(idx) |
| self.assertIn(name, frame.GetDisplayFunctionName()) |
| self.assertEqual(frame.IsArtificial(), is_artificial) |