ThreadTracer.h 1.5 KB

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  1. /*
  2. * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
  3. *
  4. * SPDX-License-Identifier: BSD-2-Clause
  5. */
  6. #pragma once
  7. #include <AK/Optional.h>
  8. #include <AK/OwnPtr.h>
  9. #include <Kernel/Forward.h>
  10. #include <LibC/sys/arch/i386/regs.h>
  11. namespace Kernel {
  12. class ThreadTracer {
  13. public:
  14. static OwnPtr<ThreadTracer> create(ProcessID tracer) { return try_make<ThreadTracer>(tracer); }
  15. ProcessID tracer_pid() const { return m_tracer_pid; }
  16. bool has_pending_signal(u32 signal) const { return m_pending_signals & (1 << (signal - 1)); }
  17. void set_signal(u32 signal) { m_pending_signals |= (1 << (signal - 1)); }
  18. void unset_signal(u32 signal) { m_pending_signals &= ~(1 << (signal - 1)); }
  19. bool is_tracing_syscalls() const { return m_trace_syscalls; }
  20. void set_trace_syscalls(bool val) { m_trace_syscalls = val; }
  21. void set_regs(const RegisterState& regs);
  22. void set_regs(const PtraceRegisters& regs) { m_regs = regs; }
  23. bool has_regs() const { return m_regs.has_value(); }
  24. const PtraceRegisters& regs() const
  25. {
  26. VERIFY(m_regs.has_value());
  27. return m_regs.value();
  28. }
  29. explicit ThreadTracer(ProcessID);
  30. private:
  31. ProcessID m_tracer_pid { -1 };
  32. // This is a bitmap for signals that are sent from the tracer to the tracee
  33. // TODO: Since we do not currently support sending signals
  34. // to the tracee via PT_CONTINUE, this bitmap is always zeroed
  35. u32 m_pending_signals { 0 };
  36. bool m_trace_syscalls { false };
  37. Optional<PtraceRegisters> m_regs;
  38. };
  39. }