xref: /llvm-project-15.0.7/lldb/test/API/functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py (revision 4cc8f2a0)

"""
Test lldb data formatter subsystem.
"""

from __future__ import print_function


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


class PythonSynthDataFormatterTestCase(TestBase):

    def test_with_run_command(self):
        """Test data formatter commands."""
        self.build()
        self.data_formatter_commands()

    def test_rdar10960550_with_run_command(self):
        """Test data formatter commands."""
        self.build()
        self.rdar10960550_formatter_commands()

    def setUp(self):
        # Call super's setUp().
        TestBase.setUp(self)
        # Find the line number to break at.
        self.line = line_number('main.cpp', '// Set break point at this line.')
        self.line2 = line_number('main.cpp',
                                 '// Set cast break point at this line.')
        self.line3 = line_number(
            'main.cpp', '// Set second cast break point at this line.')

    def data_formatter_commands(self):
        """Test using Python synthetic children provider."""

        _, process, thread, _ = lldbutil.run_to_line_breakpoint(
            self, lldb.SBFileSpec("main.cpp"), self.line)

        # This is the function to remove the custom formats in order to have a
        # clean slate for the next test case.
        def cleanup():
            self.runCmd('type format clear', check=False)
            self.runCmd('type summary clear', check=False)
            self.runCmd('type filter clear', check=False)
            self.runCmd('type synth clear', check=False)

        # Execute the cleanup function during test case tear down.
        self.addTearDownHook(cleanup)

        # print the f00_1 variable without a synth
        self.expect("frame variable f00_1",
                    substrs=['a = 1',
                             'b = 2',
                             'r = 34'])

        # now set up the synth
        self.runCmd("script from fooSynthProvider import *")
        self.runCmd("type synth add -l fooSynthProvider foo")
        self.runCmd("type synth add -l wrapfooSynthProvider wrapfoo")
        self.expect("type synthetic list foo", substrs=['fooSynthProvider'])

        # note that the value of fake_a depends on target byte order
        if process.GetByteOrder() == lldb.eByteOrderLittle:
            fake_a_val = 0x02000000
        else:
            fake_a_val = 0x00000100

        # check that we get the two real vars and the fake_a variables
        self.expect(
            "frame variable f00_1",
            substrs=[
                'a = 1',
                'fake_a = %d' % fake_a_val,
                'r = 34',
            ])

        # check that we do not get the extra vars
        self.expect("frame variable f00_1", matching=False,
                    substrs=['b = 2'])

        # check access to members by name
        self.expect('frame variable f00_1.fake_a',
                    substrs=['%d' % fake_a_val])

        # check access to members by index
        self.expect('frame variable f00_1[1]',
                    substrs=['%d' % fake_a_val])

        # put synthetic children in summary in several combinations
        self.runCmd(
            "type summary add --summary-string \"fake_a=${svar.fake_a}\" foo")
        self.expect('frame variable f00_1',
                    substrs=['fake_a=%d' % fake_a_val])
        self.runCmd(
            "type summary add --summary-string \"fake_a=${svar[1]}\" foo")
        self.expect('frame variable f00_1',
                    substrs=['fake_a=%d' % fake_a_val])

        # clear the summary
        self.runCmd("type summary delete foo")

        # check that the caching does not span beyond the stopoint
        self.runCmd("n")

        if process.GetByteOrder() == lldb.eByteOrderLittle:
            fake_a_val = 0x02000000
        else:
            fake_a_val = 0x00000200

        self.expect(
            "frame variable f00_1",
            substrs=[
                'a = 2',
                'fake_a = %d' % fake_a_val,
                'r = 34',
            ])

        # check that altering the object also alters fake_a
        self.runCmd("expr f00_1.a = 280")

        if process.GetByteOrder() == lldb.eByteOrderLittle:
            fake_a_val = 0x02000001
        else:
            fake_a_val = 0x00011800

        self.expect(
            "frame variable f00_1",
            substrs=[
                'a = 280',
                'fake_a = %d' % fake_a_val,
                'r = 34',
            ])

        # check that expanding a pointer does the right thing
        if process.GetByteOrder() == lldb.eByteOrderLittle:
            fake_a_val = 0x0d000000
        else:
            fake_a_val = 0x00000c00

        self.expect(
            "frame variable --ptr-depth 1 f00_ptr",
            substrs=[
                'a = 12',
                'fake_a = %d' % fake_a_val,
                'r = 45',
            ])
        self.expect(
            "frame variable --ptr-depth 1 wrapper",
            substrs=[
                'a = 12',
                'fake_a = %d' % fake_a_val,
                'r = 45',
            ])

        # now add a filter.. it should fail
        self.expect("type filter add foo --child b --child j", error=True,
                    substrs=['cannot add'])

        # we get the synth again..
        self.expect('frame variable f00_1', matching=False,
                    substrs=['b = 1',
                             'j = 17'])
        self.expect(
            "frame variable --ptr-depth 1 f00_ptr",
            substrs=[
                'a = 12',
                'fake_a = %d' % fake_a_val,
                'r = 45',
            ])
        self.expect(
            "frame variable --ptr-depth 1 wrapper",
            substrs=[
                'a = 12',
                'fake_a = %d' % fake_a_val,
                'r = 45',
            ])

        # Test that the custom dereference operator for `wrapfoo` works through
        # the Python API. The synthetic children provider gets queried at
        # slightly different times in this case.
        wrapper_var = thread.GetSelectedFrame().FindVariable('wrapper')
        foo_var = wrapper_var.Dereference()
        self.assertEqual(foo_var.GetNumChildren(), 3)
        self.assertEqual(foo_var.GetChildAtIndex(0).GetName(), 'a')
        self.assertEqual(foo_var.GetChildAtIndex(1).GetName(), 'fake_a')
        self.assertEqual(foo_var.GetChildAtIndex(2).GetName(), 'r')

        # now delete the synth and add the filter
        self.runCmd("type synth delete foo")
        self.runCmd("type synth delete wrapfoo")
        self.runCmd("type filter add foo --child b --child j")

        self.expect('frame variable f00_1',
                    substrs=['b = 2',
                             'j = 18'])
        self.expect("frame variable --ptr-depth 1 f00_ptr", matching=False,
                    substrs=['r = 45',
                             'fake_a = %d' % fake_a_val,
                             'a = 12'])
        self.expect("frame variable --ptr-depth 1 wrapper", matching=False,
                    substrs=['r = 45',
                             'fake_a = %d' % fake_a_val,
                             'a = 12'])

        # now add the synth and it should fail
        self.expect("type synth add -l fooSynthProvider foo", error=True,
                    substrs=['cannot add'])

        # check the listing
        self.expect('type synth list', matching=False,
                    substrs=['foo',
                             'Python class fooSynthProvider'])
        self.expect('type filter list',
                    substrs=['foo',
                             '.b',
                             '.j'])

        # delete the filter, add the synth
        self.runCmd("type filter delete foo")
        self.runCmd("type synth add -l fooSynthProvider foo")

        self.expect('frame variable f00_1', matching=False,
                    substrs=['b = 2',
                             'j = 18'])
        self.expect(
            "frame variable --ptr-depth 1 f00_ptr",
            substrs=[
                'a = 12',
                'fake_a = %d' % fake_a_val,
                'r = 45',
            ])
        self.expect(
            "frame variable --ptr-depth 1 wrapper",
            substrs=[
                'a = 12',
                'fake_a = %d' % fake_a_val,
                'r = 45',
            ])

        # check the listing
        self.expect('type synth list',
                    substrs=['foo',
                             'Python class fooSynthProvider'])
        self.expect('type filter list', matching=False,
                    substrs=['foo',
                             '.b',
                             '.j'])

        # delete the synth and check that we get good output
        self.runCmd("type synth delete foo")

        self.expect("frame variable f00_1",
                    substrs=['a = 280',
                             'b = 2',
                             'j = 18'])

        self.expect("frame variable f00_1", matching=False,
                    substrs=['fake_a = '])

    def rdar10960550_formatter_commands(self):
        """Test that synthetic children persist stoppoints."""
        self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)

        # The second breakpoint is on a multi-line expression, so the comment
        # can't be on the right line...
        lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.line2, num_expected_locations=1, loc_exact=False)
        lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.line3, num_expected_locations=1, loc_exact=True)

        self.runCmd("run", RUN_SUCCEEDED)

        # The stop reason of the thread should be breakpoint.
        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
                    substrs=['stopped',
                             'stop reason = breakpoint'])

        # This is the function to remove the custom formats in order to have a
        # clean slate for the next test case.
        def cleanup():
            self.runCmd('type format clear', check=False)
            self.runCmd('type summary clear', check=False)
            self.runCmd('type filter clear', check=False)
            self.runCmd('type synth clear', check=False)

        # Execute the cleanup function during test case tear down.
        self.addTearDownHook(cleanup)

        self.runCmd("command script import ./ftsp.py --allow-reload")
        self.runCmd("type synth add -l ftsp.ftsp wrapint")

        # we need to check that the VO is properly updated so that the same synthetic children are reused
        # but their values change correctly across stop-points - in order to do this, self.runCmd("next")
        # does not work because it forces a wipe of the stack frame - this is why we are using this more contrived
        # mechanism to achieve our goal of preserving test_cast as a VO
        test_cast = self.dbg.GetSelectedTarget().GetProcess(
        ).GetSelectedThread().GetSelectedFrame().FindVariable('test_cast')

        str_cast = str(test_cast)

        if self.TraceOn():
            print(str_cast)

        self.assertTrue(str_cast.find('A') != -1, 'could not find A in output')
        self.assertTrue(str_cast.find('B') != -1, 'could not find B in output')
        self.assertTrue(str_cast.find('C') != -1, 'could not find C in output')
        self.assertTrue(str_cast.find('D') != -1, 'could not find D in output')
        self.assertTrue(
            str_cast.find("4 = '\\0'") != -1,
            'could not find item 4 == 0')

        self.dbg.GetSelectedTarget().GetProcess().GetSelectedThread().StepOver()

        str_cast = str(test_cast)

        if self.TraceOn():
            print(str_cast)

        # we detect that all the values of the child objects have changed - but the counter-generated item
        # is still fixed at 0 because it is cached - this would fail if update(self): in ftsp returned False
        # or if synthetic children were not being preserved
        self.assertTrue(str_cast.find('Q') != -1, 'could not find Q in output')
        self.assertTrue(str_cast.find('X') != -1, 'could not find X in output')
        self.assertTrue(str_cast.find('T') != -1, 'could not find T in output')
        self.assertTrue(str_cast.find('F') != -1, 'could not find F in output')
        self.assertTrue(
            str_cast.find("4 = '\\0'") != -1,
            'could not find item 4 == 0')