xref: /llvm-project/lldb/test/API/functionalities/thread/step_until/TestStepUntil.py (revision 2238dcc39358353cac21df75c3c3286ab20b8f53)

"""Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""


import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class StepUntilTestCase(TestBase):
    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"
        self.less_than_two = line_number("main.c", "Less than 2")
        self.greater_than_two = line_number("main.c", "Greater than or equal to 2.")
        self.back_out_in_main = line_number("main.c", "Back out in main")

    def common_setup(self, args):
        self.build()
        exe = self.getBuildArtifact("a.out")

        target = self.dbg.CreateTarget(exe)
        self.assertTrue(target, VALID_TARGET)

        main_source_spec = lldb.SBFileSpec(self.main_source)
        break_before = target.BreakpointCreateBySourceRegex(
            "At the start", main_source_spec
        )
        self.assertTrue(break_before, VALID_BREAKPOINT)

        # Now launch the process, and do not stop at entry point.
        process = target.LaunchSimple(args, 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_before)

        if len(threads) != 1:
            self.fail("Failed to stop at first breakpoint in main.")

        thread = threads[0]
        return thread

    def do_until(self, args, until_lines, expected_linenum):
        thread = self.common_setup(args)

        cmd_interp = self.dbg.GetCommandInterpreter()
        ret_obj = lldb.SBCommandReturnObject()

        cmd_line = "thread until"
        for line_num in until_lines:
            cmd_line += " %d" % (line_num)

        cmd_interp.HandleCommand(cmd_line, ret_obj)
        self.assertTrue(
            ret_obj.Succeeded(), "'%s' failed: %s." % (cmd_line, ret_obj.GetError())
        )

        frame = thread.frames[0]
        line = frame.GetLineEntry().GetLine()
        self.assertEqual(
            line, expected_linenum, "Did not get the expected stop line number"
        )

    def test_hitting_one(self):
        """Test thread step until - targeting one line and hitting it."""
        self.do_until(None, [self.less_than_two], self.less_than_two)

    def test_targetting_two_hitting_first(self):
        """Test thread step until - targeting two lines and hitting one."""
        self.do_until(
            ["foo", "bar", "baz"],
            [self.less_than_two, self.greater_than_two],
            self.greater_than_two,
        )

    def test_targetting_two_hitting_second(self):
        """Test thread step until - targeting two lines and hitting the other one."""
        self.do_until(
            None, [self.less_than_two, self.greater_than_two], self.less_than_two
        )

    def test_missing_one(self):
        """Test thread step until - targeting one line and missing it by stepping out to call site"""
        self.do_until(
            ["foo", "bar", "baz"], [self.less_than_two], self.back_out_in_main
        )