4c54399b7e
Explicitly copy dbregs to new threads to ensure that watchpoints are propagated properly. Fixes the test failure due to apparent kernel race between reporting a new thread and resuming main thread execution that makes implicit inheritance of dbregs unreliable. By copying them explicitly, we ensure that the new thread correctly respects watchpoints that were set after the thread was created but before it was reported. The code is copied from the NetBSD plugin and modernized to use llvm::Error. Differential Revision: https://reviews.llvm.org/D91032
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
//===-- NativeThreadFreeBSD.h --------------------------------- -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef liblldb_NativeThreadFreeBSD_H_
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#define liblldb_NativeThreadFreeBSD_H_
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#include "lldb/Host/common/NativeThreadProtocol.h"
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#include "Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.h"
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#include <csignal>
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#include <map>
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#include <string>
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namespace lldb_private {
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namespace process_freebsd {
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class NativeProcessFreeBSD;
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class NativeThreadFreeBSD : public NativeThreadProtocol {
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friend class NativeProcessFreeBSD;
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public:
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NativeThreadFreeBSD(NativeProcessFreeBSD &process, lldb::tid_t tid);
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// NativeThreadProtocol Interface
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std::string GetName() override;
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lldb::StateType GetState() override;
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bool GetStopReason(ThreadStopInfo &stop_info,
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std::string &description) override;
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NativeRegisterContextFreeBSD &GetRegisterContext() override;
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Status SetWatchpoint(lldb::addr_t addr, size_t size, uint32_t watch_flags,
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bool hardware) override;
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Status RemoveWatchpoint(lldb::addr_t addr) override;
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Status SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override;
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Status RemoveHardwareBreakpoint(lldb::addr_t addr) override;
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private:
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// Interface for friend classes
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Status Resume();
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Status SingleStep();
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Status Suspend();
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void SetStoppedBySignal(uint32_t signo, const siginfo_t *info = nullptr);
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void SetStoppedByBreakpoint();
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void SetStoppedByTrace();
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void SetStoppedByExec();
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void SetStoppedByWatchpoint(uint32_t wp_index);
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void SetStoppedWithNoReason();
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void SetStopped();
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void SetRunning();
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void SetStepping();
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llvm::Error CopyWatchpointsFrom(NativeThreadFreeBSD &source);
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// Member Variables
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lldb::StateType m_state;
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ThreadStopInfo m_stop_info;
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std::unique_ptr<NativeRegisterContextFreeBSD> m_reg_context_up;
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std::string m_stop_description;
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using WatchpointIndexMap = std::map<lldb::addr_t, uint32_t>;
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WatchpointIndexMap m_watchpoint_index_map;
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WatchpointIndexMap m_hw_break_index_map;
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};
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typedef std::shared_ptr<NativeThreadFreeBSD> NativeThreadFreeBSDSP;
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} // namespace process_freebsd
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} // namespace lldb_private
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#endif // #ifndef liblldb_NativeThreadFreeBSD_H_
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