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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Optional.h>
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#include <AK/OwnPtr.h>
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#include <Kernel/Forward.h>
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#include <LibC/sys/arch/i386/regs.h>
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namespace Kernel {
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class ThreadTracer {
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public:
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static ErrorOr<NonnullOwnPtr<ThreadTracer>> try_create(ProcessID tracer) { return adopt_nonnull_own_or_enomem(new (nothrow) ThreadTracer(tracer)); }
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ProcessID tracer_pid() const { return m_tracer_pid; }
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bool has_pending_signal(u32 signal) const { return m_pending_signals & (1 << (signal - 1)); }
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void set_signal(u32 signal) { m_pending_signals |= (1 << (signal - 1)); }
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void unset_signal(u32 signal) { m_pending_signals &= ~(1 << (signal - 1)); }
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bool is_tracing_syscalls() const { return m_trace_syscalls; }
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void set_trace_syscalls(bool val) { m_trace_syscalls = val; }
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void set_regs(const RegisterState& regs);
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void set_regs(const PtraceRegisters& regs) { m_regs = regs; }
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bool has_regs() const { return m_regs.has_value(); }
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const PtraceRegisters& regs() const
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{
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VERIFY(m_regs.has_value());
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return m_regs.value();
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}
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private:
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explicit ThreadTracer(ProcessID);
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ProcessID m_tracer_pid { -1 };
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// This is a bitmap for signals that are sent from the tracer to the tracee
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// TODO: Since we do not currently support sending signals
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// to the tracee via PT_CONTINUE, this bitmap is always zeroed
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u32 m_pending_signals { 0 };
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bool m_trace_syscalls { false };
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Optional<PtraceRegisters> m_regs;
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};
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}
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