ebdbc26a3e
When using SBProcess::GetScriptedImplementation in python, if the process has a valid implementation, we returned a reference of the object without incrementing the reference counting. That causes the interpreter to crash after accessing the reference several times. This patch address this by incrementing the reference count when passing the valid object reference. Differential Revision: https://reviews.llvm.org/D145260 Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
211 lines
8.4 KiB
Python
211 lines
8.4 KiB
Python
"""
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Test python scripted process in lldb
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"""
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import os, shutil
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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from lldbsuite.test import lldbtest
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import dummy_scripted_process
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class ScriptedProcesTestCase(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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@skipUnlessDarwin
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def test_python_plugin_package(self):
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"""Test that the lldb python module has a `plugins.scripted_process`
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package."""
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self.expect('script import lldb.plugins',
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substrs=["ModuleNotFoundError"], matching=False)
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self.expect('script dir(lldb.plugins)',
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substrs=["scripted_process"])
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self.expect('script import lldb.plugins.scripted_process',
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substrs=["ModuleNotFoundError"], matching=False)
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self.expect('script dir(lldb.plugins.scripted_process)',
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substrs=["ScriptedProcess"])
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self.expect('script from lldb.plugins.scripted_process import ScriptedProcess',
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substrs=["ImportError"], matching=False)
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self.expect('script dir(ScriptedProcess)',
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substrs=["launch"])
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def move_blueprint_to_dsym(self, blueprint_name):
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blueprint_origin_path = os.path.join(self.getSourceDir(), blueprint_name)
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dsym_bundle = self.getBuildArtifact("a.out.dSYM")
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blueprint_destination_path = os.path.join(dsym_bundle, "Contents",
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"Resources", "Python")
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if not os.path.exists(blueprint_destination_path):
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os.mkdir(blueprint_destination_path)
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blueprint_destination_path = os.path.join(blueprint_destination_path, "a_out.py")
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shutil.copy(blueprint_origin_path, blueprint_destination_path)
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@skipUnlessDarwin
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def test_invalid_scripted_register_context(self):
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"""Test that we can launch an lldb scripted process with an invalid
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Scripted Thread, with invalid register context."""
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self.build()
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os.environ['SKIP_SCRIPTED_PROCESS_LAUNCH'] = '1'
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def cleanup():
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del os.environ["SKIP_SCRIPTED_PROCESS_LAUNCH"]
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self.addTearDownHook(cleanup)
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self.runCmd("settings set target.load-script-from-symbol-file true")
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self.move_blueprint_to_dsym('invalid_scripted_process.py')
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target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
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self.assertTrue(target, VALID_TARGET)
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log_file = self.getBuildArtifact('thread.log')
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self.runCmd("log enable lldb thread -f " + log_file)
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self.assertTrue(os.path.isfile(log_file))
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launch_info = lldb.SBLaunchInfo(None)
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launch_info.SetProcessPluginName("ScriptedProcess")
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launch_info.SetScriptedProcessClassName("a_out.InvalidScriptedProcess")
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error = lldb.SBError()
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process = target.Launch(launch_info, error)
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self.assertSuccess(error)
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertEqual(process.GetProcessID(), 666)
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self.assertEqual(process.GetNumThreads(), 0)
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impl = process.GetScriptedImplementation()
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self.assertTrue(impl)
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impl = process.GetScriptedImplementation()
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self.assertTrue(impl)
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impl = process.GetScriptedImplementation()
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self.assertTrue(impl)
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impl = process.GetScriptedImplementation()
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self.assertTrue(impl)
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addr = 0x500000000
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buff = process.ReadMemory(addr, 4, error)
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self.assertEqual(buff, None)
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self.assertTrue(error.Fail())
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self.assertEqual(error.GetCString(), "This is an invalid scripted process!")
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with open(log_file, 'r') as f:
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log = f.read()
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self.assertIn("Failed to get scripted thread registers data.", log)
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@skipUnlessDarwin
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def test_scripted_process_and_scripted_thread(self):
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"""Test that we can launch an lldb scripted process using the SBAPI,
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check its process ID, read string from memory, check scripted thread
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id, name stop reason and register context.
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"""
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self.build()
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target_0 = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
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self.assertTrue(target_0, VALID_TARGET)
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os.environ['SKIP_SCRIPTED_PROCESS_LAUNCH'] = '1'
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def cleanup():
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del os.environ["SKIP_SCRIPTED_PROCESS_LAUNCH"]
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self.addTearDownHook(cleanup)
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scripted_process_example_relpath = 'dummy_scripted_process.py'
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self.runCmd("command script import " + os.path.join(self.getSourceDir(),
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scripted_process_example_relpath))
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launch_info = lldb.SBLaunchInfo(None)
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launch_info.SetProcessPluginName("ScriptedProcess")
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launch_info.SetScriptedProcessClassName("dummy_scripted_process.DummyScriptedProcess")
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error = lldb.SBError()
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process_0 = target_0.Launch(launch_info, error)
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self.assertTrue(process_0 and process_0.IsValid(), PROCESS_IS_VALID)
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self.assertEqual(process_0.GetProcessID(), 42)
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self.assertEqual(process_0.GetNumThreads(), 1)
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py_impl = process_0.GetScriptedImplementation()
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self.assertTrue(py_impl)
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self.assertTrue(isinstance(py_impl, dummy_scripted_process.DummyScriptedProcess))
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self.assertFalse(hasattr(py_impl, 'my_super_secret_member'))
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py_impl.my_super_secret_member = 42
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self.assertTrue(hasattr(py_impl, 'my_super_secret_member'))
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self.assertEqual(py_impl.my_super_secret_method(), 42)
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# Try reading from target #0 process ...
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addr = 0x500000000
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message = "Hello, target 0"
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buff = process_0.ReadCStringFromMemory(addr, len(message) + 1, error)
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self.assertSuccess(error)
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self.assertEqual(buff, message)
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target_1 = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
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self.assertTrue(target_1, VALID_TARGET)
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# We still need to specify a PID when attaching even for scripted processes
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attach_info = lldb.SBAttachInfo(42)
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attach_info.SetProcessPluginName("ScriptedProcess")
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attach_info.SetScriptedProcessClassName("dummy_scripted_process.DummyScriptedProcess")
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error = lldb.SBError()
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process_1 = target_1.Attach(attach_info, error)
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self.assertTrue(process_1 and process_1.IsValid(), PROCESS_IS_VALID)
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self.assertEqual(process_1.GetProcessID(), 42)
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self.assertEqual(process_1.GetNumThreads(), 1)
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# ... then try reading from target #1 process ...
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message = "Hello, target 1"
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buff = process_1.ReadCStringFromMemory(addr, len(message) + 1, error)
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self.assertSuccess(error)
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self.assertEqual(buff, message)
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# ... now, reading again from target #0 process to make sure the call
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# gets dispatched to the right target.
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message = "Hello, target 0"
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buff = process_0.ReadCStringFromMemory(addr, len(message) + 1, error)
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self.assertSuccess(error)
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self.assertEqual(buff, message)
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# Let's write some memory.
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message = "Hello, world!"
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bytes_written = process_0.WriteMemoryAsCString(addr, message, error)
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self.assertSuccess(error)
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self.assertEqual(bytes_written, len(message) + 1)
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# ... and check if that memory was saved properly.
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buff = process_0.ReadCStringFromMemory(addr, len(message) + 1, error)
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self.assertSuccess(error)
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self.assertEqual(buff, message)
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thread = process_0.GetSelectedThread()
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self.assertTrue(thread, "Invalid thread.")
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self.assertEqual(thread.GetThreadID(), 0x19)
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self.assertEqual(thread.GetName(), "DummyScriptedThread.thread-1")
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self.assertStopReason(thread.GetStopReason(), lldb.eStopReasonSignal)
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self.assertGreater(thread.GetNumFrames(), 0)
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frame = thread.GetFrameAtIndex(0)
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GPRs = None
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register_set = frame.registers # Returns an SBValueList.
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for regs in register_set:
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if 'general purpose' in regs.name.lower():
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GPRs = regs
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break
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self.assertTrue(GPRs, "Invalid General Purpose Registers Set")
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self.assertGreater(GPRs.GetNumChildren(), 0)
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for idx, reg in enumerate(GPRs, start=1):
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if idx > 21:
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break
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self.assertEqual(idx, int(reg.value, 16))
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self.assertTrue(frame.IsArtificial(), "Frame is not artificial")
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pc = frame.GetPCAddress().GetLoadAddress(target_0)
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self.assertEqual(pc, 0x0100001b00)
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