================ @@ -0,0 +1,102 @@ +//===-- ThreadPlanSingleThreadTimeout.h -------------------------*- 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 +// +//===----------------------------------------------------------------------===// + +#ifndef LLDB_TARGET_THREADPLANSINGLETHREADTIMEOUT_H +#define LLDB_TARGET_THREADPLANSINGLETHREADTIMEOUT_H + +#include "lldb/Target/Thread.h" +#include "lldb/Target/ThreadPlan.h" +#include "lldb/Utility/Event.h" +#include "lldb/Utility/LLDBLog.h" +#include "lldb/Utility/State.h" + +#include <thread> + +namespace lldb_private { + +// +// Thread plan used by single thread execution to issue timeout. This is useful +// to detect potential deadlock in single thread execution. The timeout measures +// the elapsed time from the last internal stop and gets reset by each internal +// stop to ensure we are accurately detecting execution not moving forward. +// This means this thread plan may be created/destroyed multiple times by the +// parent execution plan. +// +// When timeout happens, the thread plan resolves the potential deadlock by +// issuing a thread specific async interrupt to enter stop state, then all +// threads execution are resumed to resolve the potential deadlock. +// +class ThreadPlanSingleThreadTimeout : public ThreadPlan { + enum class State { + WaitTimeout, // Waiting for timeout. + AsyncInterrupt, // Async interrupt has been issued. + Done, // Finished resume all threads. + }; + +public: + struct TimeoutInfo { + ThreadPlanSingleThreadTimeout *m_instance = nullptr; + ThreadPlanSingleThreadTimeout::State m_last_state = State::WaitTimeout; + }; + + ~ThreadPlanSingleThreadTimeout() override; + + // If input \param thread is running in single thread mode, push a + // new ThreadPlanSingleThreadTimeout based on timeout setting from fresh new + // state. The reference of \param info is passed in so that when + // ThreadPlanSingleThreadTimeout got popped out its last state can be stored ---------------- jimingham wrote:
"popped out" is confusing. We just say "popped" for the most part. https://github.com/llvm/llvm-project/pull/90930 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
