forked from OSchip/llvm-project
223 lines
9.7 KiB
Python
223 lines
9.7 KiB
Python
"""Test that we handle inferiors that send signals to themselves"""
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from __future__ import print_function
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import os
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import lldb
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import re
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from lldbsuite.test.lldbplatformutil import getDarwinOSTriples
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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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@skipIfWindows # signals do not exist on Windows
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class RaiseTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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def test_sigstop(self):
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self.build()
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self.signal_test('SIGSTOP', False)
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# passing of SIGSTOP is not correctly handled, so not testing that scenario: https://llvm.org/bugs/show_bug.cgi?id=23574
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@skipIfDarwin # darwin does not support real time signals
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@skipIfTargetAndroid()
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def test_sigsigrtmin(self):
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self.build()
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self.signal_test('SIGRTMIN', True)
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def launch(self, target, signal):
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# launch the process, do not stop at entry point.
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process = target.LaunchSimple([signal], None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertEqual(process.GetState(), lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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self.assertTrue(thread.IsValid(), "Thread should be stopped due to a breakpoint")
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return process
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def set_handle(self, signal, pass_signal, stop_at_signal, notify_signal):
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return_obj = lldb.SBCommandReturnObject()
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self.dbg.GetCommandInterpreter().HandleCommand(
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"process handle %s -p %s -s %s -n %s" % (signal, pass_signal, stop_at_signal, notify_signal),
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return_obj)
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self.assertTrue (return_obj.Succeeded() == True, "Setting signal handling failed")
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def signal_test(self, signal, test_passing):
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"""Test that we handle inferior raising signals"""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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lldbutil.run_break_set_by_symbol(self, "main")
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# launch
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process = self.launch(target, signal)
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signo = process.GetUnixSignals().GetSignalNumberFromName(signal)
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# retrieve default signal disposition
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return_obj = lldb.SBCommandReturnObject()
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self.dbg.GetCommandInterpreter().HandleCommand("process handle %s " % signal, return_obj)
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match = re.match('NAME *PASS *STOP *NOTIFY.*(false|true) *(false|true) *(false|true)',
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return_obj.GetOutput(), re.IGNORECASE | re.DOTALL)
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if not match:
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self.fail('Unable to retrieve default signal disposition.')
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default_pass = match.group(1)
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default_stop = match.group(2)
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default_notify = match.group(3)
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# Make sure we stop at the signal
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self.set_handle(signal, "false", "true", "true")
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process.Continue()
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self.assertEqual(process.GetState(), lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
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self.assertTrue(thread.IsValid(), "Thread should be stopped due to a signal")
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self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
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self.assertEqual(thread.GetStopReasonDataAtIndex(0), signo,
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"The stop signal was %s" % signal)
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# Continue until we exit.
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process.Continue()
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self.assertEqual(process.GetState(), lldb.eStateExited)
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self.assertEqual(process.GetExitStatus(), 0)
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# launch again
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process = self.launch(target, signal)
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# Make sure we do not stop at the signal. We should still get the notification.
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self.set_handle(signal, "false", "false", "true")
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self.expect("process continue", substrs=["stopped and restarted", signal])
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self.assertEqual(process.GetState(), lldb.eStateExited)
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self.assertEqual(process.GetExitStatus(), 0)
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# launch again
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process = self.launch(target, signal)
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# Make sure we do not stop at the signal, and we do not get the notification.
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self.set_handle(signal, "false", "false", "false")
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self.expect("process continue", substrs=["stopped and restarted"], matching=False)
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self.assertEqual(process.GetState(), lldb.eStateExited)
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self.assertEqual(process.GetExitStatus(), 0)
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if not test_passing:
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# reset signal handling to default
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self.set_handle(signal, default_pass, default_stop, default_notify)
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return
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# launch again
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process = self.launch(target, signal)
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# Make sure we stop at the signal
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self.set_handle(signal, "true", "true", "true")
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process.Continue()
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self.assertEqual(process.GetState(), lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
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self.assertTrue(thread.IsValid(), "Thread should be stopped due to a signal")
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self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
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self.assertEqual(thread.GetStopReasonDataAtIndex(0),
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process.GetUnixSignals().GetSignalNumberFromName(signal),
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"The stop signal was %s" % signal)
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# Continue until we exit. The process should receive the signal.
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process.Continue()
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self.assertEqual(process.GetState(), lldb.eStateExited)
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self.assertEqual(process.GetExitStatus(), signo)
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# launch again
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process = self.launch(target, signal)
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# Make sure we do not stop at the signal. We should still get the notification. Process
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# should receive the signal.
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self.set_handle(signal, "true", "false", "true")
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self.expect("process continue", substrs=["stopped and restarted", signal])
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self.assertEqual(process.GetState(), lldb.eStateExited)
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self.assertEqual(process.GetExitStatus(), signo)
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# launch again
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process = self.launch(target, signal)
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# Make sure we do not stop at the signal, and we do not get the notification. Process
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# should receive the signal.
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self.set_handle(signal, "true", "false", "false")
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self.expect("process continue", substrs=["stopped and restarted"], matching=False)
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self.assertEqual(process.GetState(), lldb.eStateExited)
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self.assertEqual(process.GetExitStatus(), signo)
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# reset signal handling to default
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self.set_handle(signal, default_pass, default_stop, default_notify)
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@expectedFailureAll(oslist=["linux"]+getDarwinOSTriples(), bugnumber="llvm.org/pr20231")
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def test_restart_bug(self):
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"""Test that we catch a signal in the edge case where the process receives it while we are
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about to interrupt it"""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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bkpt = target.BreakpointCreateByName("main")
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self.assertTrue(bkpt.IsValid(), VALID_BREAKPOINT)
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# launch the inferior and don't wait for it to stop
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self.dbg.SetAsync(True)
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error = lldb.SBError()
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listener = lldb.SBListener("my listener")
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process = target.Launch (listener,
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["SIGSTOP"], # argv
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None, # envp
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None, # stdin_path
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None, # stdout_path
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None, # stderr_path
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None, # working directory
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0, # launch flags
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False, # Stop at entry
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error) # error
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self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
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event = lldb.SBEvent()
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# Give the child enough time to reach the breakpoint,
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# while clearing out all the pending events.
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# The last WaitForEvent call will time out after 2 seconds.
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while listener.WaitForEvent(2, event):
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if self.TraceOn():
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print("Process changing state to:", self.dbg.StateAsCString(process.GetStateFromEvent(event)))
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# now the process should be stopped
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self.assertEqual(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
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self.assertEqual(len(lldbutil.get_threads_stopped_at_breakpoint(process, bkpt)), 1,
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"A thread should be stopped at breakpoint")
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# Remove all breakpoints. This makes sure we don't have to single-step over them when we
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# resume the process below
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target.DeleteAllBreakpoints()
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# resume the process and immediately try to set another breakpoint. When using the remote
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# stub, this will trigger a request to stop the process just as it is about to stop
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# naturally due to a SIGSTOP signal it raises. Make sure we do not lose this signal.
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process.Continue()
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self.assertTrue(target.BreakpointCreateByName("handler").IsValid(), VALID_BREAKPOINT)
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# Clear the events again
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while listener.WaitForEvent(2, event):
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if self.TraceOn():
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print("Process changing state to:", self.dbg.StateAsCString(process.GetStateFromEvent(event)))
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# The process should be stopped due to a signal
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self.assertEqual(process.GetState(), lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
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self.assertTrue(thread.IsValid(), "Thread should be stopped due to a signal")
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self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
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signo = process.GetUnixSignals().GetSignalNumberFromName("SIGSTOP")
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self.assertEqual(thread.GetStopReasonDataAtIndex(0), signo,
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"The stop signal was %s" % signal)
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# We are done
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process.Kill()
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