forked from Bananymous/banan-os
131 lines
3.5 KiB
C++
131 lines
3.5 KiB
C++
#pragma once
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#include <BAN/NoCopyMove.h>
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#include <BAN/RefPtr.h>
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#include <BAN/UniqPtr.h>
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#include <kernel/Memory/VirtualRange.h>
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#include <signal.h>
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#include <sys/types.h>
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namespace Kernel
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{
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class Process;
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class Thread
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{
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BAN_NON_COPYABLE(Thread);
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BAN_NON_MOVABLE(Thread);
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public:
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using entry_t = void(*)(void*);
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enum class State
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{
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NotStarted,
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Executing,
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Terminating,
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Terminated
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};
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class TerminateBlocker
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{
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public:
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TerminateBlocker(Thread&);
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~TerminateBlocker();
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private:
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Thread& m_thread;
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};
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public:
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static BAN::ErrorOr<Thread*> create_kernel(entry_t, void*, Process*);
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static BAN::ErrorOr<Thread*> create_userspace(Process*);
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~Thread();
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BAN::ErrorOr<Thread*> clone(Process*, uintptr_t rsp, uintptr_t rip);
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void setup_exec();
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void setup_process_cleanup();
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bool has_signal_to_execute() const;
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void set_signal_done(int signal);
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void handle_signal(int signal = 0);
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bool add_signal(int signal);
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void set_return_rsp(uintptr_t& rsp) { m_return_rsp = &rsp; }
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void set_return_rip(uintptr_t& rip) { m_return_rip = &rip; }
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uintptr_t& return_rsp() { ASSERT(m_return_rsp); return *m_return_rsp; }
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uintptr_t& return_rip() { ASSERT(m_return_rip); return *m_return_rip; }
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pid_t tid() const { return m_tid; }
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void set_rsp(uintptr_t rsp) { m_rsp = rsp; validate_stack(); }
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void set_rip(uintptr_t rip) { m_rip = rip; }
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uintptr_t rsp() const { return m_rsp; }
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uintptr_t rip() const { return m_rip; }
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void set_started() { ASSERT(m_state == State::NotStarted); m_state = State::Executing; }
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void set_terminating();
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State state() const { return m_state; }
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vaddr_t stack_base() const { return m_stack->vaddr(); }
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size_t stack_size() const { return m_stack->size(); }
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VirtualRange& stack() { return *m_stack; }
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VirtualRange& interrupt_stack() { return *m_interrupt_stack; }
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vaddr_t interrupt_stack_base() const { return m_interrupt_stack ? m_interrupt_stack->vaddr() : 0; }
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size_t interrupt_stack_size() const { return m_interrupt_stack ? m_interrupt_stack->size() : 0; }
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static Thread& current() ;
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static pid_t current_tid();
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Process& process();
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bool has_process() const { return m_process; }
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bool is_userspace() const { return m_is_userspace; }
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size_t virtual_page_count() const { return m_stack->size() / PAGE_SIZE; }
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size_t physical_page_count() const { return virtual_page_count(); }
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#if __enable_sse
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void save_sse() { asm volatile("fxsave %0" :: "m"(m_sse_storage)); }
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void load_sse() { asm volatile("fxrstor %0" :: "m"(m_sse_storage)); }
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#endif
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private:
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Thread(pid_t tid, Process*);
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void on_exit();
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void validate_stack() const;
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private:
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static constexpr size_t m_kernel_stack_size = PAGE_SIZE * 4;
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static constexpr size_t m_userspace_stack_size = PAGE_SIZE * 2;
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static constexpr size_t m_interrupt_stack_size = PAGE_SIZE * 2;
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BAN::UniqPtr<VirtualRange> m_interrupt_stack;
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BAN::UniqPtr<VirtualRange> m_stack;
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uintptr_t m_rip { 0 };
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uintptr_t m_rsp { 0 };
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const pid_t m_tid { 0 };
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State m_state { State::NotStarted };
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Process* m_process { nullptr };
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bool m_is_userspace { false };
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uintptr_t* m_return_rsp { nullptr };
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uintptr_t* m_return_rip { nullptr };
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uint64_t m_signal_pending_mask { 0 };
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uint64_t m_signal_block_mask { 0 };
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int m_handling_signal { 0 };
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static_assert(_SIGMAX < 64);
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uint64_t m_terminate_blockers { 0 };
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#if __enable_sse
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alignas(16) uint8_t m_sse_storage[512] {};
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#endif
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friend class Scheduler;
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};
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} |