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//===-- SWIG Interface for SBEvent ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
namespace lldb {
class SBBroadcaster;
%feature("docstring",
"API clients can register to receive events.
For example, check out the following output:
Try wait for event...
Event description: 0x103d0bb70 Event: broadcaster = 0x1009c8410, type = 0x00000001, data = { process = 0x1009c8400 (pid = 21528), state = running}
Event data flavor: Process::ProcessEventData
Process state: running
Try wait for event...
Event description: 0x103a700a0 Event: broadcaster = 0x1009c8410, type = 0x00000001, data = { process = 0x1009c8400 (pid = 21528), state = stopped}
Event data flavor: Process::ProcessEventData
Process state: stopped
Try wait for event...
Event description: 0x103d0d4a0 Event: broadcaster = 0x1009c8410, type = 0x00000001, data = { process = 0x1009c8400 (pid = 21528), state = exited}
Event data flavor: Process::ProcessEventData
Process state: exited
Try wait for event...
timeout occurred waiting for event...
from test/python_api/event/TestEventspy:
def do_listen_for_and_print_event(self):
'''Create a listener and use SBEvent API to print the events received.'''
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.BreakpointCreateByName('c', 'a.out')
# Now launch the process, and do not stop at the entry point.
process = target.LaunchSimple(None, None, os.getcwd())
self.assertTrue(process.GetState() == lldb.eStateStopped,
PROCESS_STOPPED)
# Get a handle on the process's broadcaster.
broadcaster = process.GetBroadcaster()
# Create an empty event object.
event = lldb.SBEvent()
# Create a listener object and register with the broadcaster.
listener = lldb.SBListener('my listener')
rc = broadcaster.AddListener(listener, lldb.SBProcess.eBroadcastBitStateChanged)
self.assertTrue(rc, 'AddListener successfully retruns')
traceOn = self.TraceOn()
if traceOn:
lldbutil.print_stacktraces(process)
# Create MyListeningThread class to wait for any kind of event.
import threading
class MyListeningThread(threading.Thread):
def run(self):
count = 0
# Let's only try at most 4 times to retrieve any kind of event.
# After that, the thread exits.
while not count > 3:
if traceOn:
print('Try wait for event...')
if listener.WaitForEventForBroadcasterWithType(5,
broadcaster,
lldb.SBProcess.eBroadcastBitStateChanged,
event):
if traceOn:
desc = lldbutil.get_description(event))
print('Event description:', desc)
print('Event data flavor:', event.GetDataFlavor())
print('Process state:', lldbutil.state_type_to_str(process.GetState()))
print()
else:
if traceOn:
print 'timeout occurred waiting for event...'
count = count + 1
return
# Let's start the listening thread to retrieve the events.
my_thread = MyListeningThread()
my_thread.start()
# Use Python API to continue the process. The listening thread should be
# able to receive the state changed events.
process.Continue()
# Use Python API to kill the process. The listening thread should be
# able to receive the state changed event, too.
process.Kill()
# Wait until the 'MyListeningThread' terminates.
my_thread.join()
") SBEvent;
class SBEvent
{
public:
SBEvent();
SBEvent (const lldb::SBEvent &rhs);
%feature("autodoc",
"__init__(self, int type, str data) -> SBEvent (make an event that contains a C string)"
) SBEvent;
SBEvent (uint32_t event, const char *cstr, uint32_t cstr_len);
~SBEvent();
bool
IsValid() const;
const char *
GetDataFlavor ();
uint32_t
GetType () const;
lldb::SBBroadcaster
GetBroadcaster () const;
const char *
GetBroadcasterClass () const;
bool
BroadcasterMatchesRef (const lldb::SBBroadcaster &broadcaster);
void
Clear();
static const char *
GetCStringFromEvent (const lldb::SBEvent &event);
bool
GetDescription (lldb::SBStream &description) const;
};
} // namespace lldb
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