lldb/test/API/functionalities/load_lazy/TestLoadUsingLazyBind.py

"""
Test that SBProcess.LoadImageUsingPaths uses RTLD_LAZY
"""



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


class LoadUsingLazyBind(TestBase):

    mydir = TestBase.compute_mydir(__file__)
    NO_DEBUG_INFO_TESTCASE = True

    @skipIfRemote
    @skipIfWindows # The Windows platform doesn't implement DoLoadImage.
    @skipIf(oslist=["linux"], archs=["arm"]) # Fails on arm/linux
    # Failing for unknown reasons on Linux, see
    # https://bugs.llvm.org/show_bug.cgi?id=49656.
    def test_load_using_lazy_bind(self):
        """Test that we load using RTLD_LAZY"""

        self.build()
        wd = os.path.realpath(self.getBuildDir())

        def make_lib_name(name):
            return (self.platformContext.shlib_prefix + name + "." +
                    self.platformContext.shlib_extension)

        def make_lib_path(name):
            libpath = os.path.join(wd, make_lib_name(name))
            self.assertTrue(os.path.exists(libpath))
            return libpath

        libt2_0 = make_lib_path('t2_0')
        libt2_1 = make_lib_path('t2_1')

        # Overwrite t2_0 with t2_1 to delete the definition of `use`.
        shutil.copy(libt2_1, libt2_0)

        # Launch a process and break
        (target, process, thread, _) = lldbutil.run_to_source_breakpoint(self,
                                                "break here",
                                                lldb.SBFileSpec("main.cpp"),
                                                extra_images=["t1"])

        # Load libt1; should fail unless we use RTLD_LAZY
        error = lldb.SBError()
        lib_spec = lldb.SBFileSpec(make_lib_name('t1'))
        paths = lldb.SBStringList()
        paths.AppendString(wd)
        out_spec = lldb.SBFileSpec()
        token = process.LoadImageUsingPaths(lib_spec, paths, out_spec, error)
        self.assertNotEqual(token, lldb.LLDB_INVALID_IMAGE_TOKEN, "Got a valid token")

        # Calling `f1()` should return 5.
        frame = thread.GetFrameAtIndex(0)
        val = frame.EvaluateExpression("f1()")
        self.assertTrue(val.IsValid())
        self.assertEquals(val.GetValueAsSigned(-1), 5)