59 lines · python
1"""Test that backtraces can follow cross-DSO tail calls"""2 3 4import lldb5from lldbsuite.test.decorators import *6from lldbsuite.test.lldbtest import *7from lldbsuite.test import lldbutil8 9 10class TestCrossDSOTailCalls(TestBase):11 @skipIf(compiler="clang", compiler_version=["<", "22.0"])12 @skipIf(dwarf_version=["<", "4"])13 @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr26265")14 def test_cross_dso_tail_calls(self):15 self.build()16 exe = self.getBuildArtifact("a.out")17 target = self.dbg.CreateTarget(exe)18 self.assertTrue(target, VALID_TARGET)19 20 # Register our shared libraries for remote targets so they get21 # automatically uploaded22 environment = self.registerSharedLibrariesWithTarget(target, ["One", "Two"])23 24 lldbutil.run_break_set_by_source_regexp(25 self, "// break here", extra_options="-f Two.c"26 )27 28 process = target.LaunchSimple(29 None, environment, self.get_process_working_directory()30 )31 self.assertTrue(process, PROCESS_IS_VALID)32 33 # We should be stopped in the second dylib.34 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)35 36 # Debug helper:37 # self.runCmd("log enable -f /tmp/lldb.log lldb step")38 # self.runCmd("bt")39 40 # Check that the backtrace is what we expect:41 # frame #0: 0x000000010d5e5f94 libTwo.dylib`tail_called_in_b_from_b at Two.c:7:3 [opt]42 # frame #1: 0x000000010d5e5fa0 libTwo.dylib`tail_called_in_b_from_a [opt] [artificial]43 # frame #2: 0x000000010d5dcf80 libOne.dylib`helper_in_a [opt] [artificial]44 # frame #3: 0x000000010d5dcf79 libOne.dylib`tail_called_in_a_from_main at One.c:10:3 [opt]45 # frame #4: 0x000000010d5d3f80 a.out`helper [opt] [artificial]46 # frame #5: 0x000000010d5d3f79 a.out`main at main.c:10:3 [opt]47 expected_frames = [48 ("tail_called_in_b_from_b", False),49 ("tail_called_in_b_from_a", True),50 ("helper_in_a", True),51 ("tail_called_in_a_from_main", False),52 ("helper", True),53 ("main", False),54 ]55 for idx, (name, is_artificial) in enumerate(expected_frames):56 frame = thread.GetFrameAtIndex(idx)57 self.assertIn(name, frame.GetDisplayFunctionName())58 self.assertEqual(frame.IsArtificial(), is_artificial)59