Differential D50478 Diff 166534 lldb/packages/Python/lldbsuite/test/functionalities/tail_call_frames/thread_step_out_or_return/TestSteppingOutWithArtificialFrames.py
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lldb/packages/Python/lldbsuite/test/functionalities/tail_call_frames/thread_step_out_or_return/TestSteppingOutWithArtificialFrames.py
- This file was added.
| """ | |||||
| Test SB API support for identifying artificial (tail call) frames. | |||||
| """ | |||||
| import lldb | |||||
| import lldbsuite.test.lldbutil as lldbutil | |||||
| from lldbsuite.test.lldbtest import * | |||||
| class TestArtificialFrameThreadStepOut1(TestBase): | |||||
| mydir = TestBase.compute_mydir(__file__) | |||||
| # If your test case doesn't stress debug info, the | |||||
| # set this to true. That way it won't be run once for | |||||
| # each debug info format. | |||||
| NO_DEBUG_INFO_TESTCASE = True | |||||
| def prepare_thread(self): | |||||
| exe = self.getBuildArtifact("a.out") | |||||
| # Create a target by the debugger. | |||||
| target = self.dbg.CreateTarget(exe) | |||||
| self.assertTrue(target, VALID_TARGET) | |||||
| breakpoint = target.BreakpointCreateBySourceRegex("break here", | |||||
| lldb.SBFileSpec("main.cpp")) | |||||
| self.assertTrue(breakpoint and | |||||
| breakpoint.GetNumLocations() == 1, | |||||
| VALID_BREAKPOINT) | |||||
| error = lldb.SBError() | |||||
| launch_info = lldb.SBLaunchInfo(None) | |||||
| process = target.Launch(launch_info, error) | |||||
| self.assertTrue(process, PROCESS_IS_VALID) | |||||
| # Did we hit our breakpoint? | |||||
| threads = lldbutil.get_threads_stopped_at_breakpoint(process, | |||||
| breakpoint) | |||||
| self.assertTrue( | |||||
| len(threads) == 1, | |||||
| "There should be a thread stopped at our breakpoint") | |||||
| self.assertTrue(breakpoint.GetHitCount() == 1) | |||||
| thread = threads[0] | |||||
| # Here's what we expect to see in the backtrace: | |||||
| # frame #0: ... a.out`sink() at main.cpp:13:4 [opt] | |||||
| # frame #1: ... a.out`func3() at main.cpp:14:1 [opt] [artificial] | |||||
| # frame #2: ... a.out`func2() at main.cpp:18:62 [opt] | |||||
| # frame #3: ... a.out`func1() at main.cpp:18:85 [opt] [artificial] | |||||
| # frame #4: ... a.out`main at main.cpp:23:3 [opt] | |||||
| return thread | |||||
| def test_stepping_out_past_artificial_frame(self): | |||||
| self.build() | |||||
| thread = self.prepare_thread() | |||||
| # Frame #0's ancestor is artificial. Stepping out should move to | |||||
| # frame #2, because we behave as-if artificial frames were not present. | |||||
| thread.StepOut() | |||||
| frame2 = thread.GetSelectedFrame() | |||||
| self.assertTrue(frame2.GetDisplayFunctionName() == "func2()") | |||||
| self.assertFalse(frame2.IsArtificial()) | |||||
| # Ditto: stepping out of frame #2 should move to frame #4. | |||||
| thread.StepOut() | |||||
| frame4 = thread.GetSelectedFrame() | |||||
| self.assertTrue(frame4.GetDisplayFunctionName() == "main") | |||||
| self.assertFalse(frame2.IsArtificial()) | |||||
| def test_return_past_artificial_frame(self): | |||||
| self.build() | |||||
| thread = self.prepare_thread() | |||||
| value = lldb.SBValue() | |||||
| # Frame #0's ancestor is artificial. Returning from frame #0 should move | |||||
| # to frame #2. | |||||
| thread.ReturnFromFrame(thread.GetSelectedFrame(), value) | |||||
| frame2 = thread.GetSelectedFrame() | |||||
| self.assertTrue(frame2.GetDisplayFunctionName() == "func2()") | |||||
| self.assertFalse(frame2.IsArtificial()) | |||||
| # Ditto: stepping out of frame #2 should move to frame #4. | |||||
| thread.ReturnFromFrame(thread.GetSelectedFrame(), value) | |||||
| frame4 = thread.GetSelectedFrame() | |||||
| self.assertTrue(frame4.GetDisplayFunctionName() == "main") | |||||
| self.assertFalse(frame2.IsArtificial()) | |||||
| def setUp(self): | |||||
| # Call super's setUp(). | |||||
| TestBase.setUp(self) | |||||