breakpoint/objc/TestObjCBreakpoints.py

"""
Test that objective-c constant strings are generated correctly by the expression
parser.
"""


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


class TestObjCBreakpoints(TestBase):
    @add_test_categories(["objc"])
    def test_break(self):
        """Test setting Objective-C specific breakpoints (DWARF in .o files)."""
        self.build()
        self.setTearDownCleanup()
        self.check_objc_breakpoints(False)

    def setUp(self):
        # Call super's setUp().
        TestBase.setUp(self)
        # Find the line number to break inside main().
        self.main_source = "main.m"
        self.line = line_number(self.main_source, "// Set breakpoint here")

    def check_category_breakpoints(self):
        name_bp = self.target.BreakpointCreateByName("myCategoryFunction")
        selector_bp = self.target.BreakpointCreateByName(
            "myCategoryFunction",
            lldb.eFunctionNameTypeSelector,
            lldb.SBFileSpecList(),
            lldb.SBFileSpecList(),
        )
        self.assertEqual(
            name_bp.GetNumLocations(),
            selector_bp.GetNumLocations(),
            'Make sure setting a breakpoint by name "myCategoryFunction" sets a breakpoint even though it is in a category',
        )
        for bp_loc in selector_bp:
            function_name = bp_loc.GetAddress().GetSymbol().GetName()
            self.assertIn(
                " myCategoryFunction]",
                function_name,
                'Make sure all function names have " myCategoryFunction]" in their names',
            )

        category_bp = self.target.BreakpointCreateByName(
            "-[MyClass(MyCategory) myCategoryFunction]"
        )
        stripped_bp = self.target.BreakpointCreateByName(
            "-[MyClass myCategoryFunction]"
        )
        stripped2_bp = self.target.BreakpointCreateByName(
            "[MyClass myCategoryFunction]"
        )
        self.assertEqual(
            category_bp.GetNumLocations(),
            1,
            "Make sure we can set a breakpoint using a full objective C function name with the category included (-[MyClass(MyCategory) myCategoryFunction])",
        )
        self.assertEqual(
            stripped_bp.GetNumLocations(),
            1,
            "Make sure we can set a breakpoint using a full objective C function name without the category included (-[MyClass myCategoryFunction])",
        )
        self.assertEqual(
            stripped2_bp.GetNumLocations(),
            1,
            "Make sure we can set a breakpoint using a full objective C function name without the category included ([MyClass myCategoryFunction])",
        )

    def check_objc_breakpoints(self, have_dsym):
        """Test constant string generation amd comparison by the expression parser."""

        # Set debugger into synchronous mode
        self.dbg.SetAsync(False)

        # Create a target by the debugger.
        exe = self.getBuildArtifact("a.out")
        self.target = self.dbg.CreateTarget(exe)
        self.assertTrue(self.target, VALID_TARGET)

        # ----------------------------------------------------------------------
        # Set breakpoints on all selectors whose name is "count". This should
        # catch breakpoints that are both C functions _and_ anything whose
        # selector is "count" because just looking at "count" we can't tell
        # definitively if the name is a selector or a C function
        # ----------------------------------------------------------------------
        name_bp = self.target.BreakpointCreateByName("count")
        selector_bp = self.target.BreakpointCreateByName(
            "count",
            lldb.eFunctionNameTypeSelector,
            lldb.SBFileSpecList(),
            lldb.SBFileSpecList(),
        )
        self.assertGreaterEqual(
            name_bp.GetNumLocations(),
            selector_bp.GetNumLocations(),
            'Make sure we get at least the same amount of breakpoints if not more when setting by name "count"',
        )
        self.assertGreater(
            selector_bp.GetNumLocations(),
            50,
            'Make sure we find a lot of "count" selectors',
        )  # There are 93 on the latest MacOSX
        for bp_loc in selector_bp:
            function_name = bp_loc.GetAddress().GetSymbol().GetName()
            self.assertIn(
                " count]",
                function_name,
                'Make sure all function names have " count]" in their names',
            )

        # ----------------------------------------------------------------------
        # Set breakpoints on all selectors whose name is "isEqual:". This should
        # catch breakpoints that are only ObjC selectors because no C function
        # can end with a :
        # ----------------------------------------------------------------------
        name_bp = self.target.BreakpointCreateByName("isEqual:")
        selector_bp = self.target.BreakpointCreateByName(
            "isEqual:",
            lldb.eFunctionNameTypeSelector,
            lldb.SBFileSpecList(),
            lldb.SBFileSpecList(),
        )
        self.assertEqual(
            name_bp.GetNumLocations(),
            selector_bp.GetNumLocations(),
            'Make sure setting a breakpoint by name "isEqual:" only sets selector breakpoints',
        )
        for bp_loc in selector_bp:
            function_name = bp_loc.GetAddress().GetSymbol().GetName()
            self.assertIn(
                " isEqual:]",
                function_name,
                'Make sure all function names have " isEqual:]" in their names',
            )

        self.check_category_breakpoints()

        if have_dsym:
            shutil.rmtree(exe + ".dSYM")
        self.assertEqual(
            subprocess.call(["/usr/bin/strip", "-Sx", exe]),
            0,
            "stripping dylib succeeded",
        )

        # Check breakpoints again, this time using the symbol table only
        self.check_category_breakpoints()