| """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms.""" |
| |
| import os, time |
| import unittest2 |
| import lldb |
| import lldbutil |
| from lldbtest import * |
| |
| class TestCStepping(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| def getCategories(self): |
| return ['basic_process'] |
| |
| @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") |
| @python_api_test |
| @dsym_test |
| def test_with_dsym_and_python_api(self): |
| """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms.""" |
| self.buildDsym() |
| self.step_over_stepping() |
| |
| @expectedFailureFreeBSD('llvm.org/pr17932') |
| @expectedFailureLinux # llvm.org/pr14437 |
| @python_api_test |
| @dwarf_test |
| def test_with_dwarf_and_python_api(self): |
| """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms.""" |
| self.buildDwarf() |
| self.step_over_stepping() |
| |
| def setUp(self): |
| # Call super's setUp(). |
| TestBase.setUp(self) |
| # Find the line numbers that we will step to in main: |
| self.main_source = "main.c" |
| |
| def step_over_stepping(self): |
| """Use Python APIs to test stepping over and hitting breakpoints.""" |
| exe = os.path.join(os.getcwd(), "a.out") |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| self.main_source_spec = lldb.SBFileSpec (self.main_source) |
| |
| breakpoints_to_disable = [] |
| |
| break_1_in_main = target.BreakpointCreateBySourceRegex ('// frame select 2, thread step-out while stopped at .c.1..', self.main_source_spec) |
| self.assertTrue(break_1_in_main, VALID_BREAKPOINT) |
| breakpoints_to_disable.append (break_1_in_main) |
| |
| break_in_a = target.BreakpointCreateBySourceRegex ('// break here to stop in a before calling b', self.main_source_spec) |
| self.assertTrue(break_in_a, VALID_BREAKPOINT) |
| breakpoints_to_disable.append (break_in_a) |
| |
| break_in_b = target.BreakpointCreateBySourceRegex ('// thread step-out while stopped at .c.2..', self.main_source_spec) |
| self.assertTrue(break_in_b, VALID_BREAKPOINT) |
| breakpoints_to_disable.append (break_in_b) |
| |
| break_in_c = target.BreakpointCreateBySourceRegex ('// Find the line number of function .c. here.', self.main_source_spec) |
| self.assertTrue(break_in_c, VALID_BREAKPOINT) |
| breakpoints_to_disable.append (break_in_c) |
| |
| # Now launch the process, and do not stop at entry point. |
| process = target.LaunchSimple (None, None, self.get_process_working_directory()) |
| |
| self.assertTrue(process, PROCESS_IS_VALID) |
| |
| # The stop reason of the thread should be breakpoint. |
| threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_1_in_main) |
| |
| if len(threads) != 1: |
| self.fail ("Failed to stop at first breakpoint in main.") |
| |
| thread = threads[0] |
| |
| # Get the stop id and for fun make sure it increases: |
| old_stop_id = process.GetStopID() |
| |
| # Now step over, which should cause us to hit the breakpoint in "a" |
| thread.StepOver() |
| |
| # The stop reason of the thread should be breakpoint. |
| threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_a) |
| if len(threads) != 1: |
| self.fail ("Failed to stop at breakpoint in a.") |
| |
| # Check that the stop ID increases: |
| new_stop_id = process.GetStopID() |
| self.assertTrue(new_stop_id > old_stop_id, "Stop ID increases monotonically.") |
| |
| thread = threads[0] |
| |
| # Step over, and we should hit the breakpoint in b: |
| thread.StepOver() |
| |
| threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_b) |
| if len(threads) != 1: |
| self.fail ("Failed to stop at breakpoint in b.") |
| thread = threads[0] |
| |
| # Now try running some function, and make sure that we still end up in the same place |
| # and with the same stop reason. |
| frame = thread.GetFrameAtIndex(0) |
| current_line = frame.GetLineEntry().GetLine() |
| current_file = frame.GetLineEntry().GetFileSpec() |
| current_bp = [] |
| current_bp.append(thread.GetStopReasonDataAtIndex(0)) |
| current_bp.append(thread.GetStopReasonDataAtIndex(1)) |
| |
| stop_id_before_expression = process.GetStopID() |
| stop_id_before_including_expressions = process.GetStopID(True) |
| |
| frame.EvaluateExpression ("(int) printf (print_string)") |
| |
| frame = thread.GetFrameAtIndex(0) |
| self.assertTrue (current_line == frame.GetLineEntry().GetLine(), "The line stayed the same after expression.") |
| self.assertTrue (current_file == frame.GetLineEntry().GetFileSpec(), "The file stayed the same after expression.") |
| self.assertTrue (thread.GetStopReason() == lldb.eStopReasonBreakpoint, "We still say we stopped for a breakpoint.") |
| self.assertTrue (thread.GetStopReasonDataAtIndex(0) == current_bp[0] and thread.GetStopReasonDataAtIndex(1) == current_bp[1], "And it is the same breakpoint.") |
| |
| # Also make sure running the expression didn't change the public stop id |
| # but did change if we are asking for expression stops as well. |
| stop_id_after_expression = process.GetStopID() |
| stop_id_after_including_expressions = process.GetStopID(True) |
| |
| self.assertTrue (stop_id_before_expression == stop_id_after_expression, "Expression calling doesn't change stop ID") |
| |
| self.assertTrue (stop_id_after_including_expressions > stop_id_before_including_expressions, "Stop ID including expressions increments over expression call.") |
| |
| # Do the same thing with an expression that's going to crash, and make sure we are still unchanged. |
| |
| frame.EvaluateExpression ("((char *) 0)[0] = 'a'") |
| |
| frame = thread.GetFrameAtIndex(0) |
| self.assertTrue (current_line == frame.GetLineEntry().GetLine(), "The line stayed the same after expression.") |
| self.assertTrue (current_file == frame.GetLineEntry().GetFileSpec(), "The file stayed the same after expression.") |
| self.assertTrue (thread.GetStopReason() == lldb.eStopReasonBreakpoint, "We still say we stopped for a breakpoint.") |
| self.assertTrue (thread.GetStopReasonDataAtIndex(0) == current_bp[0] and thread.GetStopReasonDataAtIndex(1) == current_bp[1], "And it is the same breakpoint.") |
| |
| # Now continue and make sure we just complete the step: |
| # Disable all our breakpoints first - sometimes the compiler puts two line table entries in for the |
| # breakpoint a "b" and we don't want to hit that. |
| for bkpt in breakpoints_to_disable: |
| bkpt.SetEnabled(False) |
| |
| process.Continue() |
| |
| self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "a") |
| self.assertTrue (thread.GetStopReason() == lldb.eStopReasonPlanComplete) |
| |
| # And one more time should get us back to main: |
| process.Continue() |
| |
| self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "main") |
| self.assertTrue (thread.GetStopReason() == lldb.eStopReasonPlanComplete) |
| |
| # Now make sure we can call a function, break in the called function, then have "continue" get us back out again: |
| frame = thread.GetFrameAtIndex(0) |
| frame = thread.GetFrameAtIndex(0) |
| current_line = frame.GetLineEntry().GetLine() |
| current_file = frame.GetLineEntry().GetFileSpec() |
| |
| break_in_b.SetEnabled(True) |
| frame.EvaluateExpression ("b (4)", lldb.eNoDynamicValues, False) |
| |
| threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_b) |
| if len(threads) != 1: |
| self.fail ("Failed to stop at breakpoint in b when calling b.") |
| thread = threads[0] |
| |
| # So do a step over here to make sure we can still do that: |
| |
| thread.StepOver() |
| |
| # See that we are still in b: |
| func_name = thread.GetFrameAtIndex(0).GetFunctionName() |
| self.assertTrue (func_name == "b", "Should be in 'b', were in %s"%(func_name)) |
| |
| # Okay, now if we continue, we will finish off our function call and we should end up back in "a" as if nothing had happened: |
| process.Continue () |
| |
| self.assertTrue (thread.GetFrameAtIndex(0).GetLineEntry().GetLine() == current_line) |
| self.assertTrue (thread.GetFrameAtIndex(0).GetLineEntry().GetFileSpec() == current_file) |
| |
| # Now we are going to test step in targetting a function: |
| |
| break_in_b.SetEnabled (False) |
| |
| break_before_complex_1 = target.BreakpointCreateBySourceRegex ('// Stop here to try step in targetting b.', self.main_source_spec) |
| self.assertTrue(break_before_complex_1, VALID_BREAKPOINT) |
| |
| break_before_complex_2 = target.BreakpointCreateBySourceRegex ('// Stop here to try step in targetting complex.', self.main_source_spec) |
| self.assertTrue(break_before_complex_2, VALID_BREAKPOINT) |
| |
| break_before_complex_3 = target.BreakpointCreateBySourceRegex ('// Stop here to step targetting b and hitting breakpoint.', self.main_source_spec) |
| self.assertTrue(break_before_complex_3, VALID_BREAKPOINT) |
| |
| break_before_complex_4 = target.BreakpointCreateBySourceRegex ('// Stop here to make sure bogus target steps over.', self.main_source_spec) |
| self.assertTrue(break_before_complex_4, VALID_BREAKPOINT) |
| |
| threads = lldbutil.continue_to_breakpoint(process, break_before_complex_1) |
| self.assertTrue (len(threads) == 1) |
| thread = threads[0] |
| break_before_complex_1.SetEnabled(False) |
| |
| thread.StepInto ("b") |
| self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "b") |
| |
| # Now continue out and stop at the next call to complex. This time step all the way into complex: |
| threads = lldbutil.continue_to_breakpoint (process, break_before_complex_2) |
| self.assertTrue (len(threads) == 1) |
| thread = threads[0] |
| break_before_complex_2.SetEnabled(False) |
| |
| thread.StepInto ("complex") |
| self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "complex") |
| |
| # Now continue out and stop at the next call to complex. This time enable breakpoints in a and c and then step targetting b: |
| threads = lldbutil.continue_to_breakpoint (process, break_before_complex_3) |
| self.assertTrue (len(threads) == 1) |
| thread = threads[0] |
| break_before_complex_3.SetEnabled(False) |
| |
| break_at_start_of_a = target.BreakpointCreateByName ('a') |
| break_at_start_of_c = target.BreakpointCreateByName ('c') |
| |
| thread.StepInto ("b") |
| threads = lldbutil.get_stopped_threads(process, lldb.eStopReasonBreakpoint); |
| |
| self.assertTrue (len(threads) == 1) |
| thread = threads[0] |
| stop_break_id = thread.GetStopReasonDataAtIndex(0) |
| self.assertTrue(stop_break_id == break_at_start_of_a.GetID() or stop_break_id == break_at_start_of_c.GetID()) |
| |
| break_at_start_of_a.SetEnabled(False) |
| break_at_start_of_c.SetEnabled(False) |
| |
| process.Continue() |
| self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "b") |
| |
| # Now continue out and stop at the next call to complex. This time enable breakpoints in a and c and then step targetting b: |
| threads = lldbutil.continue_to_breakpoint (process, break_before_complex_4) |
| self.assertTrue (len(threads) == 1) |
| thread = threads[0] |
| break_before_complex_4.SetEnabled(False) |
| |
| thread.StepInto("NoSuchFunction") |
| self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "main") |
| |
| if __name__ == '__main__': |
| import atexit |
| lldb.SBDebugger.Initialize() |
| atexit.register(lambda: lldb.SBDebugger.Terminate()) |
| unittest2.main() |
