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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Optional.h>
#include <AK/OwnPtr.h>
#include <Kernel/Arch/RegisterState.h>
#include <Kernel/Forward.h>
#include <LibC/sys/arch/regs.h>
namespace Kernel {
class ThreadTracer {
public:
static ErrorOr<NonnullOwnPtr<ThreadTracer>> try_create(ProcessID tracer) { return adopt_nonnull_own_or_enomem(new (nothrow) ThreadTracer(tracer)); }
ProcessID tracer_pid() const { return m_tracer_pid; }
bool has_pending_signal(u32 signal) const { return (m_pending_signals & (1 << (signal - 1))) != 0; }
void set_signal(u32 signal) { m_pending_signals |= (1 << (signal - 1)); }
void unset_signal(u32 signal) { m_pending_signals &= ~(1 << (signal - 1)); }
bool is_tracing_syscalls() const { return m_trace_syscalls; }
void set_trace_syscalls(bool val) { m_trace_syscalls = val; }
void set_regs(RegisterState const& regs);
void set_regs(PtraceRegisters const& regs) { m_regs = regs; }
bool has_regs() const { return m_regs.has_value(); }
PtraceRegisters const& regs() const
{
VERIFY(m_regs.has_value());
return m_regs.value();
}
private:
explicit ThreadTracer(ProcessID);
ProcessID m_tracer_pid { -1 };
// This is a bitmap for signals that are sent from the tracer to the tracee
// TODO: Since we do not currently support sending signals
// to the tracee via PT_CONTINUE, this bitmap is always zeroed
u32 m_pending_signals { 0 };
bool m_trace_syscalls { false };
Optional<PtraceRegisters> m_regs;
};
}
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