llvm/lldb/test/API/functionalities/scripted_process/TestScriptedProcess.py

"""
Test python scripted process in lldb
"""

import os, json, tempfile

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

class ScriptedProcesTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    def setUp(self):
        TestBase.setUp(self)

    def tearDown(self):
        TestBase.tearDown(self)

    def test_python_plugin_package(self):
        """Test that the lldb python module has a `plugins.scripted_process`
        package."""
        self.expect('script import lldb.plugins',
                    substrs=["ModuleNotFoundError"], matching=False)

        self.expect('script dir(lldb.plugins)',
                    substrs=["scripted_process"])

        self.expect('script import lldb.plugins.scripted_process',
                    substrs=["ModuleNotFoundError"], matching=False)

        self.expect('script dir(lldb.plugins.scripted_process)',
                    substrs=["ScriptedProcess"])

        self.expect('script from lldb.plugins.scripted_process import ScriptedProcess',
                    substrs=["ImportError"], matching=False)

        self.expect('script dir(ScriptedProcess)',
                    substrs=["launch"])

    @skipIf(archs=no_match(['x86_64']))
    def test_scripted_process_and_scripted_thread(self):
        """Test that we can launch an lldb scripted process using the SBAPI,
        check its process ID, read string from memory, check scripted thread
        id, name stop reason and register context.
        """
        self.build()
        target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
        self.assertTrue(target, VALID_TARGET)

        os.environ['SKIP_SCRIPTED_PROCESS_LAUNCH'] = '1'
        def cleanup():
          del os.environ["SKIP_SCRIPTED_PROCESS_LAUNCH"]
        self.addTearDownHook(cleanup)

        scripted_process_example_relpath = 'dummy_scripted_process.py'
        self.runCmd("command script import " + os.path.join(self.getSourceDir(),
                                                            scripted_process_example_relpath))

        launch_info = lldb.SBLaunchInfo(None)
        launch_info.SetProcessPluginName("ScriptedProcess")
        launch_info.SetScriptedProcessClassName("dummy_scripted_process.DummyScriptedProcess")

        error = lldb.SBError()
        process = target.Launch(launch_info, error)
        self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
        self.assertEqual(process.GetProcessID(), 42)

        self.assertEqual(process.GetNumThreads(), 1)

        thread = process.GetSelectedThread()
        self.assertTrue(thread, "Invalid thread.")
        self.assertEqual(thread.GetThreadID(), 0x19)
        self.assertEqual(thread.GetName(), "DummyScriptedThread.thread-1")
        self.assertEqual(thread.GetStopReason(), lldb.eStopReasonSignal)

        self.assertGreater(thread.GetNumFrames(), 0)

        frame = thread.GetFrameAtIndex(0)
        GPRs = None
        register_set = frame.registers # Returns an SBValueList.
        for regs in register_set:
            if 'general purpose' in regs.name.lower():
                GPRs = regs
                break

        self.assertTrue(GPRs, "Invalid General Purpose Registers Set")
        self.assertEqual(GPRs.GetNumChildren(), 21)
        for idx, reg in enumerate(GPRs, start=1):
            self.assertEqual(idx, int(reg.value, 16))

    def create_stack_skinny_corefile(self, file):
        self.build()
        target, process, thread, _ = lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.c"))
        self.assertTrue(process.IsValid(), "Process is invalid.")
        # FIXME: Use SBAPI to save the process corefile.
        self.runCmd("process save-core -s stack  " + file)
        self.assertTrue(os.path.exists(file), "No stack-only corefile found.")
        self.assertTrue(self.dbg.DeleteTarget(target), "Couldn't delete target")

    @skipUnlessDarwin
    @skipIfOutOfTreeDebugserver
    @skipIf(archs=no_match(['x86_64']))
    @skipIfAsan # rdar://85954489
    def test_launch_scripted_process_stack_frames(self):
        """Test that we can launch an lldb scripted process from the command
        line, check its process ID and read string from memory."""
        self.build()
        target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
        self.assertTrue(target, VALID_TARGET)

        for module in target.modules:
            if 'a.out' in module.GetFileSpec().GetFilename():
                main_module = module
                break

        self.assertTrue(main_module, "Invalid main module.")
        error = target.SetModuleLoadAddress(main_module, 0)
        self.assertTrue(error.Success(), "Reloading main module at offset 0 failed.")

        os.environ['SKIP_SCRIPTED_PROCESS_LAUNCH'] = '1'
        def cleanup():
          del os.environ["SKIP_SCRIPTED_PROCESS_LAUNCH"]
        self.addTearDownHook(cleanup)

        scripted_process_example_relpath = 'stack_core_scripted_process.py'
        self.runCmd("command script import " + os.path.join(self.getSourceDir(),
                                                            scripted_process_example_relpath))

        corefile_process = None
        with tempfile.NamedTemporaryFile() as file:
            self.create_stack_skinny_corefile(file.name)
            corefile_target = self.dbg.CreateTarget(None)
            corefile_process = corefile_target.LoadCore(self.getBuildArtifact(file.name))
        self.assertTrue(corefile_process, PROCESS_IS_VALID)

        structured_data = lldb.SBStructuredData()
        structured_data.SetFromJSON(json.dumps({
            "backing_target_idx" : self.dbg.GetIndexOfTarget(corefile_process.GetTarget())
        }))
        launch_info = lldb.SBLaunchInfo(None)
        launch_info.SetProcessPluginName("ScriptedProcess")
        launch_info.SetScriptedProcessClassName("stack_core_scripted_process.StackCoreScriptedProcess")
        launch_info.SetScriptedProcessDictionary(structured_data)

        error = lldb.SBError()
        process = target.Launch(launch_info, error)
        self.assertTrue(error.Success(), error.GetCString())
        self.assertTrue(process, PROCESS_IS_VALID)
        self.assertEqual(process.GetProcessID(), 42)

        self.assertEqual(process.GetNumThreads(), 1)
        thread = process.GetSelectedThread()
        self.assertTrue(thread, "Invalid thread.")
        self.assertEqual(thread.GetName(), "StackCoreScriptedThread.thread-1")

        self.assertEqual(thread.GetNumFrames(), 3)
        frame = thread.GetSelectedFrame()
        self.assertTrue(frame, "Invalid frame.")
        self.assertEqual(frame.GetFunctionName(), "bar")
        self.assertEqual(int(frame.FindValue("i", lldb.eValueTypeVariableArgument).GetValue()), 42)
        self.assertEqual(int(frame.FindValue("j", lldb.eValueTypeVariableLocal).GetValue()), 42 * 42)