[lldb] The test TestCancelAttach.py hangs on Windows host with Linux target #115618
Description
Issue 1:
TestCancelAttach.py, line 33
The call self.target.AttachToProcessWithName(lldb.SBListener(), "LLDB-No-Such-Process", True, self.error) in the AttachThread never return in case of Windows host and Linux target.
Issue 2:
The test failed here
if thread.is_alive():
self.fail("The attach thread is alive after timeout interval")
but the main thread will still wait for the AttachThread until timeout 10 min.
The issue 1 is most important.
The callstack is the following
m_events_condition.wait(lock);
lldb_private::Listener::GetEventInternal(const lldb_private::Timeout<std::ratio<1,1000000>> & timeout, lldb_private::Broadcaster * broadcaster, unsigned int event_type_mask, std::shared_ptr<lldb_private::Event> & event_sp) at \llvm-project\lldb\source\Utility\Listener.cpp(275)
lldb_private::Listener::GetEventForBroadcasterWithType(lldb_private::Broadcaster * broadcaster, unsigned int event_type_mask, std::shared_ptr<lldb_private::Event> & event_sp, const lldb_private::Timeout<std::ratio<1,1000000>> & timeout) at \llvm-project\lldb\source\Utility\Listener.cpp(300)
lldb_private::Process::GetStateChangedEvents(std::shared_ptr<lldb_private::Event> & event_sp, const lldb_private::Timeout<std::ratio<1,1000000>> & timeout, std::shared_ptr<lldb_private::Listener> hijack_listener_sp) at \llvm-project\lldb\source\Target\Process.cpp(980)
lldb_private::Process::WaitForProcessToStop(const lldb_private::Timeout<std::ratio<1,1000000>> & timeout, std::shared_ptr<lldb_private::Event> * event_sp_ptr, bool wait_always, std::shared_ptr<lldb_private::Listener> hijack_listener_sp, lldb_private::Stream * stream, bool use_run_lock, SelectMostRelevant select_most_relevant) at \llvm-project\lldb\source\Target\Process.cpp(690)
lldb_private::Target::Attach(lldb_private::ProcessAttachInfo & attach_info, lldb_private::Stream * stream) at \llvm-project\lldb\source\Target\Target.cpp(3551)
AttachToProcess(lldb_private::ProcessAttachInfo & attach_info, lldb_private::Target & target) at \llvm-project\lldb\source\API\SBTarget.cpp(94)
lldb::SBTarget::AttachToProcessWithName(lldb::SBListener & listener, const char * name, bool wait_for, lldb::SBError & error) at \llvm-project\lldb\source\API\SBTarget.cpp(519)
_wrap_SBTarget_AttachToProcessWithName(_object * self, _object * args) at \tools\lldb\bindings\python\LLDBWrapPython.cpp(65404)
Note process_sp = platform_sp->Attach(attach_info, GetDebugger(), this, error); at \llvm-project\lldb\source\Target\Target.cpp(3526)
runs gdbserver and puts vAttachWait command with LLDB-No-Such-Process to the event queue. But this packet never sent to the target (and no response). Something is wrong with listeners/broadcasters.
Unfortunately I cannot debug (compare) it on Linux host right now.