/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2018-06-29 heyuanjie first version * 2019-10-12 Jesven Add MMU and userspace support * 2020-10-08 Bernard Architecture and code cleanup * 2021-08-26 linzhenxing add lwp_setcwd\lwp_getcwd * 2023-11-17 xqyjlj add process group and session support * 2023-12-02 Shell Add macro to create lwp status and * fix dead lock problem on pgrp */ /* * RT-Thread light-weight process */ #ifndef __LWP_H__ #define __LWP_H__ #include #include #include #include #include "lwp_arch.h" #include "lwp_pid.h" #include "lwp_ipc.h" #include "lwp_signal.h" #include "lwp_syscall.h" #include "lwp_avl.h" #include "lwp_args.h" #include "mm_aspace.h" #ifdef RT_USING_MUSLLIBC #include "libc_musl.h" #endif /* RT_USING_MUSLLIBC */ #ifdef ARCH_MM_MMU #include "lwp_shm.h" #include #include "mmu.h" #include "page.h" #else #include "lwp_mpu.h" #endif /* ARCH_MM_MMU */ #ifdef RT_USING_MUSLLIBC #include #endif /* RT_USING_MUSLLIBC */ #ifdef __cplusplus extern "C" { #endif #define LWP_MAGIC 0x5A #define LWP_TYPE_FIX_ADDR 0x01 #define LWP_TYPE_DYN_ADDR 0x02 #define LWP_ARG_MAX 8 struct rt_lwp_objs { rt_aspace_t source; struct rt_mem_obj mem_obj; }; struct rt_lwp_notify { void (*notify)(rt_wqueue_t *signalfd_queue, int signo); rt_wqueue_t *signalfd_queue; rt_slist_t list_node; }; struct lwp_tty; #ifdef RT_USING_MUSLLIBC #define LWP_COREDUMP_FLAG 0x80 #define LWP_CREATE_STAT_EXIT(exit_code) (((exit_code)&0xff) << 8) #define LWP_CREATE_STAT_SIGNALED(signo, coredump) (((signo) & 0x7f) | (coredump ? LWP_COREDUMP_FLAG : 0)) #define LWP_CREATE_STAT_STOPPED(signo) (LWP_CREATE_STAT_EXIT(signo) | 0x7f) #define LWP_CREATE_STAT_CONTINUED (0xffff) #else #error "No compatible lwp set status provided for this libc" #endif typedef struct rt_lwp *rt_lwp_t; typedef struct rt_session *rt_session_t; typedef struct rt_processgroup *rt_processgroup_t; struct rt_session { struct rt_object object; rt_lwp_t leader; rt_list_t processgroup; pid_t sid; pid_t foreground_pgid; struct rt_mutex mutex; struct lwp_tty *ctty; }; struct rt_processgroup { struct rt_object object; rt_lwp_t leader; rt_list_t process; rt_list_t pgrp_list_node; pid_t pgid; pid_t sid; struct rt_session *session; struct rt_mutex mutex; rt_atomic_t ref; /* flags on process group */ unsigned int is_orphaned:1; }; struct rt_lwp { #ifdef ARCH_MM_MMU size_t end_heap; rt_aspace_t aspace; #else #ifdef ARCH_MM_MPU struct rt_mpu_info mpu_info; #endif /* ARCH_MM_MPU */ #endif /* ARCH_MM_MMU */ #ifdef RT_USING_SMP int bind_cpu; #endif uint8_t lwp_type; uint8_t reserv[3]; /* flags */ unsigned int terminated:1; unsigned int background:1; unsigned int term_ctrlterm:1; /* have control terminal? */ unsigned int did_exec:1; /* Whether exec has been performed */ unsigned int jobctl_stopped:1; /* job control: current proc is stopped */ unsigned int wait_reap_stp:1; /* job control: has wait event for parent */ unsigned int sig_protected:1; /* signal: protected proc cannot be killed or stopped */ struct rt_lwp *parent; /* parent process */ struct rt_lwp *first_child; /* first child process */ struct rt_lwp *sibling; /* sibling(child) process */ struct rt_wqueue waitpid_waiters; lwp_status_t lwp_status; void *text_entry; uint32_t text_size; void *data_entry; uint32_t data_size; rt_atomic_t ref; void *args; uint32_t args_length; pid_t pid; pid_t sid; /* session ID */ pid_t pgid; /* process group ID */ struct rt_processgroup *pgrp; rt_list_t pgrp_node; /* process group node */ rt_list_t t_grp; /* thread group */ rt_list_t timer; /* POSIX timer object binding to a process */ struct dfs_fdtable fdt; char cmd[RT_NAME_MAX]; char *exe_file; /* process file path */ /* POSIX signal */ struct lwp_signal signal; struct lwp_avl_struct *object_root; struct rt_mutex object_mutex; struct rt_user_context user_ctx; struct rt_wqueue wait_queue; /* for console */ struct tty_struct *tty; /* NULL if no tty */ struct lwp_avl_struct *address_search_head; /* for addressed object fast search */ char working_directory[DFS_PATH_MAX]; int debug; rt_uint32_t bak_first_inst; /* backup of first instruction */ struct rt_mutex lwp_lock; rt_slist_t signalfd_notify_head; #ifdef LWP_ENABLE_ASID uint64_t generation; unsigned int asid; #endif struct rusage rt_rusage; }; struct rt_lwp *lwp_self(void); rt_err_t lwp_children_register(struct rt_lwp *parent, struct rt_lwp *child); rt_err_t lwp_children_unregister(struct rt_lwp *parent, struct rt_lwp *child); enum lwp_exit_request_type { LWP_EXIT_REQUEST_NONE = 0, LWP_EXIT_REQUEST_TRIGGERED, LWP_EXIT_REQUEST_IN_PROCESS, }; struct termios *get_old_termios(void); void lwp_setcwd(char *buf); char *lwp_getcwd(void); int lwp_check_exit_request(void); void lwp_terminate(struct rt_lwp *lwp); int lwp_tid_init(void); int lwp_tid_get(void); void lwp_tid_put(int tid); /** * @brief Automatically get a thread and increase a reference count * * @param tid queried thread ID * @return rt_thread_t */ rt_thread_t lwp_tid_get_thread_and_inc_ref(int tid); rt_thread_t lwp_tid_get_thread_raw(int tid); /** * @brief Decrease a reference count * * @param thread target thread */ void lwp_tid_dec_ref(rt_thread_t thread); void lwp_tid_set_thread(int tid, rt_thread_t thread); int lwp_execve(char *filename, int debug, int argc, char **argv, char **envp); int lwp_load(const char *filename, struct rt_lwp *lwp, uint8_t *load_addr, size_t addr_size, struct process_aux *aux); void lwp_user_obj_free(struct rt_lwp *lwp); /*create by lwp_setsid.c*/ int setsid(void); #ifdef ARCH_MM_MMU void lwp_aspace_switch(struct rt_thread *thread); #endif void lwp_user_setting_save(rt_thread_t thread); void lwp_user_setting_restore(rt_thread_t thread); void lwp_uthread_ctx_save(void *ctx); void lwp_uthread_ctx_restore(void); int lwp_setaffinity(int tid, int cpu); pid_t exec(char *filename, int debug, int argc, char **argv); /* ctime lwp API */ int timer_list_free(rt_list_t *timer_list); rt_err_t lwp_futex_init(void); rt_err_t lwp_futex(struct rt_lwp *lwp, int *uaddr, int op, int val, const struct timespec *timeout, int *uaddr2, int val3); /* processgroup api */ rt_inline pid_t lwp_pgid_get_bypgrp(rt_processgroup_t group) { return group ? group->pgid : 0; } rt_inline pid_t lwp_pgid_get_byprocess(rt_lwp_t process) { return process ? process->pgid : 0; } rt_processgroup_t lwp_pgrp_find(pid_t pgid); void lwp_pgrp_dec_ref(rt_processgroup_t pgrp); rt_processgroup_t lwp_pgrp_find_and_inc_ref(pid_t pgid); rt_processgroup_t lwp_pgrp_create(rt_lwp_t leader); int lwp_pgrp_delete(rt_processgroup_t group); /** * Note: all the pgrp with process operation must be called in the context where * process lock is taken. This is protect us from a possible dead lock condition * * The order is mandatory in the case: * PGRP_LOCK(pgrp); * LWP_LOCK(p); * ... bussiness logic * LWP_UNLOCK(p); * PGRP_UNLOCK(pgrp); */ int lwp_pgrp_insert(rt_processgroup_t group, rt_lwp_t process); int lwp_pgrp_remove(rt_processgroup_t group, rt_lwp_t process); int lwp_pgrp_move(rt_processgroup_t group, rt_lwp_t process); int lwp_pgrp_update_children_info(rt_processgroup_t group, pid_t sid, pid_t pgid); /* session api */ rt_inline pid_t lwp_sid_get_bysession(rt_session_t session) { return session ? session->sid : 0; } rt_inline pid_t lwp_sid_get_bypgrp(rt_processgroup_t group) { return group ? group->sid : 0; } rt_inline pid_t lwp_sid_get_byprocess(rt_lwp_t process) { return process ? process->sid : 0; } rt_session_t lwp_session_find(pid_t sid); rt_session_t lwp_session_create(struct rt_lwp *leader); int lwp_session_delete(rt_session_t session); /** * Note: all the session operation must be called in the context where * process lock is taken. This is protect us from a possible dead lock condition * * The order is mandatory in the case: * PGRP_LOCK(pgrp); * LWP_LOCK(p); * ... bussiness logic * LWP_UNLOCK(p); * PGRP_UNLOCK(pgrp); */ int lwp_session_insert(rt_session_t session, rt_processgroup_t group); int lwp_session_remove(rt_session_t session, rt_processgroup_t group); int lwp_session_move(rt_session_t session, rt_processgroup_t group); int lwp_session_update_children_info(rt_session_t session, pid_t sid); int lwp_session_set_foreground(rt_session_t session, pid_t pgid); /* complete the job control related bussiness on process exit */ void lwp_jobctrl_on_exit(struct rt_lwp *lwp); #ifdef __cplusplus } #endif #ifndef AUX_ARRAY_ITEMS_NR #define AUX_ARRAY_ITEMS_NR 32 #endif /* aux key */ #define AT_NULL 0 #define AT_IGNORE 1 #define AT_EXECFD 2 #define AT_PHDR 3 #define AT_PHENT 4 #define AT_PHNUM 5 #define AT_PAGESZ 6 #define AT_BASE 7 #define AT_FLAGS 8 #define AT_ENTRY 9 #define AT_NOTELF 10 #define AT_UID 11 #define AT_EUID 12 #define AT_GID 13 #define AT_EGID 14 #define AT_CLKTCK 17 #define AT_PLATFORM 15 #define AT_HWCAP 16 #define AT_FPUCW 18 #define AT_DCACHEBSIZE 19 #define AT_ICACHEBSIZE 20 #define AT_UCACHEBSIZE 21 #define AT_IGNOREPPC 22 #define AT_SECURE 23 #define AT_BASE_PLATFORM 24 #define AT_RANDOM 25 #define AT_HWCAP2 26 #define AT_EXECFN 31 struct process_aux_item { size_t key; size_t value; }; struct process_aux { struct process_aux_item item[AUX_ARRAY_ITEMS_NR]; }; struct dbg_ops_t { int (*dbg)(int argc, char **argv); uint32_t (*arch_get_ins)(void); void (*arch_activate_step)(void); void (*arch_deactivate_step)(void); int (*check_debug_event)(struct rt_hw_exp_stack *regs, unsigned long esr); rt_channel_t (*gdb_get_server_channel)(void); int (*gdb_get_step_type)(void); void (*lwp_check_debug_attach_req)(void *pc); int (*lwp_check_debug_suspend)(void); }; extern struct dbg_ops_t *rt_dbg_ops; int dbg_thread_in_debug(void); void dbg_register(struct dbg_ops_t *dbg_ops); uint32_t dbg_get_ins(void); void dbg_activate_step(void); void dbg_deactivate_step(void); int dbg_check_event(struct rt_hw_exp_stack *regs, unsigned long arg); rt_channel_t gdb_server_channel(void); int dbg_step_type(void); void dbg_attach_req(void *pc); int dbg_check_suspend(void); void rt_hw_set_process_id(int pid); void lwp_futex_exit_robust_list(rt_thread_t thread); /* backtrace service */ rt_err_t lwp_backtrace_frame(rt_thread_t uthread, struct rt_hw_backtrace_frame *frame); #endif