servers/pm/mproc.h

   1 /* This table has one slot per process.  It contains all the process management
   2  * information for each process.  Among other things, it defines the text, data
   3  * and stack segments, uids and gids, and various flags.  The kernel and file
   4  * systems have tables that are also indexed by process, with the contents
   5  * of corresponding slots referring to the same process in all three.
   6  */
   7 #include <limits.h>
   8 #include <timers.h>
   9 #include <signal.h>
  10
  11 /* Needs to be included here, for 'ps' etc */
  12 #include "const.h"
  13
  14 EXTERN struct mproc {
  15   char mp_exitstatus;           /* storage for status when process exits */
  16   char mp_sigstatus;            /* storage for signal # for killed procs */
  17   pid_t mp_pid;                 /* process id */
  18   endpoint_t mp_endpoint;       /* kernel endpoint id */
  19   pid_t mp_procgrp;             /* pid of process group (used for signals) */
  20   pid_t mp_wpid;                /* pid this process is waiting for */
  21   int mp_parent;                /* index of parent process */
  22   int mp_tracer;                /* index of tracer process, or NO_TRACER */
  23
  24   /* Child user and system times. Accounting done on child exit. */
  25   clock_t mp_child_utime;       /* cumulative user time of children */
  26   clock_t mp_child_stime;       /* cumulative sys time of children */
  27
  28   /* Real and effective uids and gids. */
  29   uid_t mp_realuid;             /* process' real uid */
  30   uid_t mp_effuid;              /* process' effective uid */
  31   gid_t mp_realgid;             /* process' real gid */
  32   gid_t mp_effgid;              /* process' effective gid */
  33
  34   /* Supplemental groups. */
  35   int mp_ngroups;               /* number of supplemental groups */
  36   gid_t mp_sgroups[NGROUPS_MAX];/* process' supplemental groups */
  37
  38   /* Signal handling information. */
  39   sigset_t mp_ignore;           /* 1 means ignore the signal, 0 means don't */
  40   sigset_t mp_catch;            /* 1 means catch the signal, 0 means don't */
  41   sigset_t mp_sigmask;          /* signals to be blocked */
  42   sigset_t mp_sigmask2;         /* saved copy of mp_sigmask */
  43   sigset_t mp_sigpending;       /* pending signals to be handled */
  44   sigset_t mp_sigtrace;         /* signals to hand to tracer first */
  45   struct sigaction mp_sigact[_NSIG]; /* as in sigaction(2) */
  46   vir_bytes mp_sigreturn;       /* address of C library __sigreturn function */
  47   struct timer mp_timer;        /* watchdog timer for alarm(2), setitimer(2) */
  48   clock_t mp_interval[NR_ITIMERS];      /* setitimer(2) repetition intervals */
  49
  50   unsigned mp_flags;            /* flag bits */
  51   unsigned mp_trace_flags;      /* trace options */
  52   vir_bytes mp_procargs;        /* ptr to proc's initial stack arguments */
  53   message mp_reply;             /* reply message to be sent to one */
  54
  55   /* Scheduling priority. */
  56   signed int mp_nice;           /* nice is PRIO_MIN..PRIO_MAX, standard 0. */
  57
  58   /* User space scheduling */
  59   int mp_max_priority;          /* this process' highest allowed priority */
  60   int mp_priority;              /* the process' current priority */
  61   int mp_time_slice;            /* this process's scheduling queue */
  62
  63   char mp_name[PROC_NAME_LEN];  /* process name */
  64 } mproc[NR_PROCS];
  65
  66 /* Flag values */
  67 #define IN_USE          0x00001 /* set when 'mproc' slot in use */
  68 #define WAITING         0x00002 /* set by WAIT system call */
  69 #define ZOMBIE          0x00004 /* waiting for parent to issue WAIT call */
  70 #define PAUSED          0x00008 /* set by PAUSE system call */
  71 #define ALARM_ON        0x00010 /* set when SIGALRM timer started */
  72 #define EXITING         0x00020 /* set by EXIT, process is now exiting */
  73 #define TOLD_PARENT     0x00040 /* parent wait() completed, ZOMBIE off */
  74 #define STOPPED         0x00080 /* set if process stopped for tracing */
  75 #define SIGSUSPENDED    0x00100 /* set by SIGSUSPEND system call */
  76 #define REPLY           0x00200 /* set if a reply message is pending */
  77 #define FS_CALL         0x00400 /* set if waiting for FS (normal calls) */
  78 #define PM_SIG_PENDING  0x00800 /* process got a signal while waiting for FS */
  79 #define UNPAUSED        0x01000 /* process is not in a blocking call */
  80 #define PRIV_PROC       0x02000 /* system process, special privileges */
  81 #define PARTIAL_EXEC    0x04000 /* process got a new map but no content */
  82 #define TRACE_EXIT      0x08000 /* tracer is forcing this process to exit */
  83 #define TRACE_ZOMBIE    0x10000 /* waiting for tracer to issue WAIT call */
  84 #define DELAY_CALL      0x20000 /* waiting for call before sending signal */
  85 #define PM_SCHEDULED    0x40000 /* this process is scheduled by PM */
  86
  87 #define NIL_MPROC ((struct mproc *) 0)
  88