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 <timers.h>
   8
   9 EXTERN struct mproc {
  10   struct mem_map mp_seg[NR_LOCAL_SEGS]; /* points to text, data, stack */
  11   char mp_exitstatus;           /* storage for status when process exits */
  12   char mp_sigstatus;            /* storage for signal # for killed procs */
  13   pid_t mp_pid;                 /* process id */
  14   endpoint_t mp_endpoint;       /* kernel endpoint id */
  15   pid_t mp_procgrp;             /* pid of process group (used for signals) */
  16   pid_t mp_wpid;                /* pid this process is waiting for */
  17   int mp_parent;                /* index of parent process */
  18
  19   /* Child user and system times. Accounting done on child exit. */
  20   clock_t mp_child_utime;       /* cumulative user time of children */
  21   clock_t mp_child_stime;       /* cumulative sys time of children */
  22
  23   /* Real and effective uids and gids. */
  24   uid_t mp_realuid;             /* process' real uid */
  25   uid_t mp_effuid;              /* process' effective uid */
  26   gid_t mp_realgid;             /* process' real gid */
  27   gid_t mp_effgid;              /* process' effective gid */
  28
  29   /* File identification for sharing. */
  30   ino_t mp_ino;                 /* inode number of file */
  31   dev_t mp_dev;                 /* device number of file system */
  32   time_t mp_ctime;              /* inode changed time */
  33
  34   /* Signal handling information. */
  35   sigset_t mp_ignore;           /* 1 means ignore the signal, 0 means don't */
  36   sigset_t mp_catch;            /* 1 means catch the signal, 0 means don't */
  37   sigset_t mp_sig2mess;         /* 1 means transform into notify message */
  38   sigset_t mp_sigmask;          /* signals to be blocked */
  39   sigset_t mp_sigmask2;         /* saved copy of mp_sigmask */
  40   sigset_t mp_sigpending;       /* pending signals to be handled */
  41   struct sigaction mp_sigact[_NSIG + 1]; /* as in sigaction(2) */
  42   vir_bytes mp_sigreturn;       /* address of C library __sigreturn function */
  43   struct sigmsg mp_sigmsg;      /* Save the details of the signal until the
  44                                  * PM_UNPAUSE request is delivered.
  45                                  */
  46   struct timer mp_timer;        /* watchdog timer for alarm(2) */
  47
  48   /* Backwards compatibility for signals. */
  49   sighandler_t mp_func;         /* all sigs vectored to a single user fcn */
  50
  51   unsigned mp_flags;            /* flag bits */
  52   vir_bytes mp_procargs;        /* ptr to proc's initial stack arguments */
  53   struct mproc *mp_swapq;       /* queue of procs waiting to be swapped in */
  54   message mp_reply;             /* reply message to be sent to one */
  55
  56   /* Communication with FS */
  57   int mp_fs_call;               /* Record the call for normal system calls */
  58   int mp_fs_call2;              /* Record the call for signals */
  59   char *mp_exec_path;           /* Path of executable */
  60   vir_bytes mp_exec_path_len;   /* Length of path (including nul) */
  61   char *mp_exec_frame;          /* Arguments */
  62   vir_bytes mp_exec_frame_len;  /* Length of arguments */
  63
  64   /* Scheduling priority. */
  65   signed int mp_nice;           /* nice is PRIO_MIN..PRIO_MAX, standard 0. */
  66
  67   char mp_name[PROC_NAME_LEN];  /* process name */
  68 } mproc[NR_PROCS];
  69
  70 /* Flag values */
  71 #define IN_USE          0x001   /* set when 'mproc' slot in use */
  72 #define WAITING         0x002   /* set by WAIT system call */
  73 #define ZOMBIE          0x004   /* set by EXIT, cleared by WAIT */
  74 #define PAUSED          0x008   /* set by PAUSE system call */
  75 #define ALARM_ON        0x010   /* set when SIGALRM timer started */
  76 #define SEPARATE        0x020   /* set if file is separate I & D space */
  77 #define TRACED          0x040   /* set if process is to be traced */
  78 #define STOPPED         0x080   /* set if process stopped for tracing */
  79 #define SIGSUSPENDED    0x100   /* set by SIGSUSPEND system call */
  80 #define REPLY           0x200   /* set if a reply message is pending */
  81 #define ONSWAP          0x400   /* set if data segment is swapped out */
  82 #define SWAPIN          0x800   /* set if on the "swap this in" queue */
  83 #define DONT_SWAP      0x1000   /* never swap out this process */
  84 #define PRIV_PROC      0x2000   /* system process, special privileges */
  85 #define PM_SIG_PENDING 0x4000   /* process got a signal while waiting for FS */
  86 #define PARTIAL_EXEC   0x8000   /* Process got a new map but no content */
  87 #define TOLD_PARENT   0x10000   /* Parent wait() completed, ZOMBIE off */
  88
  89 #define NIL_MPROC ((struct mproc *) 0)
  90