src/llvm-project/lldb/test/API/functionalities/recursion/TestValueObjectRecursion.py

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

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


class ValueObjectRecursionTestCase(TestBase):
    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.")

    @no_debug_info_test
    def test_with_run_command(self):
        """Test that deeply nested ValueObjects still work."""
        self.build()
        self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)

        lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.line, 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)

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

        root = self.frame().FindVariable("root")
        child = root.GetChildAtIndex(1)
        if self.TraceOn():
            print(root)
            print(child)
        for i in range(0, 15000):
            child = child.GetChildAtIndex(1)
        if self.TraceOn():
            print(child)
        self.assertTrue(child.IsValid(), "could not retrieve the deep ValueObject")
        self.assertTrue(
            child.GetChildAtIndex(0).IsValid(), "the deep ValueObject has no value"
        )
        self.assertNotEqual(
            child.GetChildAtIndex(0).GetValueAsUnsigned(),
            0,
            "the deep ValueObject has a zero value",
        )
        self.assertNotEqual(
            child.GetChildAtIndex(1).GetValueAsUnsigned(),
            0,
            "the deep ValueObject has no next",
        )