910831cb5c
Now that there are services other than PM and VFS that implement userland system calls directly, these services may need to know about events related to user processes. In particular, signal delivery may have to interrupt blocking system calls, and certain cleanup tasks may have to be performed after a user process exits. This patch aims to implement a generic, lasting solution for this problem, by allowing services to subscribe to "signal delivered" and/or "process exit" events from PM. PM publishes such events by sending messages to its subscribed services, which must then reply an acknowledgment message. For now, only the two aforementioned events are implemented, and only the IPC service makes use of the process event facility. The new process event publish/subscribe system replaces the previous VM notify-sig/watch-exit/query-exit system, which was unsound: 1) it allowed subscription to events from individual processes, and suffered from fundamental race conditions as a result; 2) it relied on "not too many" processes making use of the IPC server functionality in order to avoid loss of notifications. In addition, it had the "ipc" process name hardcoded, did not distinguish between signal delivery and exits, and added a roundtrip to VM for all events from all processes. Change-Id: I75ebad4bc54e646c6433f473294cb4003b2c3430
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
/* Function prototypes. */
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struct mproc;
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#include <minix/timers.h>
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/* alarm.c */
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int do_itimer(void);
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void set_alarm(struct mproc *rmp, clock_t ticks);
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void check_vtimer(int proc_nr, int sig);
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/* event.c */
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int do_proceventmask(void);
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int do_proc_event_reply(void);
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void publish_event(struct mproc *rmp);
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/* exec.c */
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int do_exec(void);
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int do_newexec(void);
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int do_execrestart(void);
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void exec_restart(struct mproc *rmp, int result, vir_bytes pc, vir_bytes sp,
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vir_bytes ps_str);
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/* forkexit.c */
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int do_fork(void);
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int do_srv_fork(void);
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int do_exit(void);
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void exit_proc(struct mproc *rmp, int exit_status, int dump_core);
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void exit_restart(struct mproc *rmp);
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int do_wait4(void);
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int wait_test(struct mproc *rmp, struct mproc *child);
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/* getset.c */
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int do_get(void);
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int do_set(void);
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/* main.c */
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int main(void);
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void reply(int proc_nr, int result);
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/* mcontext.c */
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int do_getmcontext(void);
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int do_setmcontext(void);
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/* misc.c */
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int do_reboot(void);
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int do_sysuname(void);
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int do_getsysinfo(void);
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int do_getprocnr(void);
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int do_getepinfo(void);
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int do_svrctl(void);
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int do_getsetpriority(void);
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int do_getrusage(void);
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/* schedule.c */
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void sched_init(void);
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int sched_start_user(endpoint_t ep, struct mproc *rmp);
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int sched_nice(struct mproc *rmp, int nice);
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/* profile.c */
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int do_sprofile(void);
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/* signal.c */
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int do_kill(void);
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int do_srv_kill(void);
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int process_ksig(endpoint_t proc_nr_e, int signo);
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int check_sig(pid_t proc_id, int signo, int ksig);
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void sig_proc(struct mproc *rmp, int signo, int trace, int ksig);
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int do_sigaction(void);
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int do_sigpending(void);
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int do_sigprocmask(void);
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int do_sigreturn(void);
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int do_sigsuspend(void);
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void check_pending(struct mproc *rmp);
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void restart_sigs(struct mproc *rmp);
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/* time.c */
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int do_stime(void);
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int do_time(void);
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int do_getres(void);
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int do_gettime(void);
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int do_settime(void);
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/* trace.c */
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int do_trace(void);
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void trace_stop(struct mproc *rmp, int signo);
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/* utility.c */
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pid_t get_free_pid(void);
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char *find_param(const char *key);
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struct mproc *find_proc(pid_t lpid);
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int nice_to_priority(int nice, unsigned *new_q);
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int pm_isokendpt(int ep, int *proc);
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void tell_vfs(struct mproc *rmp, message *m_ptr);
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void set_rusage_times(struct rusage *r_usage, clock_t user_time,
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clock_t sys_time);
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