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"""Test that lldb command 'process signal SIGUSR1' to send a signal to the inferior works."""
from __future__ import print_function
import lldb_shared
import os, time, signal
import lldb
from lldbtest import *
import lldbutil
class SendSignalTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break inside main().
self.line = line_number('main.c', 'Put breakpoint here')
@expectedFailureFreeBSD("llvm.org/pr23318: does not report running state")
@skipIfWindows # Windows does not support signals
def test_with_run_command(self):
"""Test that lldb command 'process signal SIGUSR1' sends a signal to the inferior process."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Now create a breakpoint on main.c by name 'c'.
breakpoint = target.BreakpointCreateByLocation('main.c', self.line)
self.assertTrue(breakpoint and
breakpoint.GetNumLocations() == 1,
VALID_BREAKPOINT)
# Get the breakpoint location from breakpoint after we verified that,
# indeed, it has one location.
location = breakpoint.GetLocationAtIndex(0)
self.assertTrue(location and
location.IsEnabled(),
VALID_BREAKPOINT_LOCATION)
# Now launch the process, no arguments & do not stop at entry point.
launch_info = lldb.SBLaunchInfo([exe])
launch_info.SetWorkingDirectory(self.get_process_working_directory())
process_listener = lldb.SBListener("signal_test_listener")
launch_info.SetListener(process_listener)
error = lldb.SBError()
process = target.Launch(launch_info, error)
self.assertTrue(process, PROCESS_IS_VALID)
self.runCmd("process handle -n False -p True -s True SIGUSR1")
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(thread.IsValid(), "We hit the first breakpoint.")
# After resuming the process, send it a SIGUSR1 signal.
self.setAsync(True)
self.assertTrue(process_listener.IsValid(), "Got a good process listener")
# Disable our breakpoint, we don't want to hit it anymore...
breakpoint.SetEnabled(False)
# Now continue:
process.Continue()
# If running remote test, there should be a connected event
if lldb.remote_platform:
self.match_state(process_listener, lldb.eStateConnected)
self.match_state(process_listener, lldb.eStateRunning)
# Now signal the process, and make sure it stops:
process.Signal(lldbutil.get_signal_number('SIGUSR1'))
self.match_state(process_listener, lldb.eStateStopped)
# Now make sure the thread was stopped with a SIGUSR1:
threads = lldbutil.get_stopped_threads(process, lldb.eStopReasonSignal)
self.assertTrue(len(threads) == 1, "One thread stopped for a signal.")
thread = threads[0]
self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
self.assertTrue(thread.GetStopReasonDataAtIndex(0) == lldbutil.get_signal_number('SIGUSR1'),
"The stop signal was SIGUSR1")
def match_state(self, process_listener, expected_state):
num_seconds = 5
broadcaster = self.process().GetBroadcaster()
event_type_mask = lldb.SBProcess.eBroadcastBitStateChanged
event = lldb.SBEvent()
got_event = process_listener.WaitForEventForBroadcasterWithType(
num_seconds, broadcaster, event_type_mask, event)
self.assertTrue(got_event, "Got an event")
state = lldb.SBProcess.GetStateFromEvent(event)
self.assertTrue(state == expected_state,
"It was the %s state." %
lldb.SBDebugger_StateAsCString(expected_state))
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