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1.1 root 1: /*
2: * One structure allocated per active
3: * process. It contains all data needed
4: * about the process while the
5: * process may be swapped out.
6: * Other per process data (user.h)
7: * is swapped with the process.
8: */
9:
10: struct proc
11: {
12: struct proc *p_link; /* linked list of running processes */
13: struct proc *p_rlink; /* (used by hardware q instructions) */
14: struct pte *p_addr; /* u-area kernel map address */
15: unsigned char p_usrpri; /* user-priority based on p_cpu and p_nice */
16: char p_pri; /* priority, negative is high */
17: unsigned char p_cpu; /* cpu usage for scheduling */
18: char p_stat;
19: char p_time; /* resident time for scheduling */
20: char p_nice; /* nice for cpu usage */
21: char p_slptime; /* time since last block */
22: char p_cursig;
23: long p_sig; /* signals pending to this process */
24: long p_siga0; /* low bit of 2 bit signal action */
25: long p_siga1; /* high bit of 2 bit signal action */
26: #define p_ignsig p_siga0 /* ignored signal mask */
27: int p_flag;
28: short p_uid; /* user id, used to direct tty signals */
29: short p_pgrp; /* name of process group leader */
30: short p_pid; /* unique process id */
31: short p_ppid; /* process id of parent */
32: void *Jp_lnode; /* per-user scheduling */
33: float Jp_sharepri; /* priority based on p_nice and p_lnode->kl.l_usage */
34: short p_poip; /* count of page outs in progress */
35: short p_szpt; /* copy of page table size */
36: clicks_t p_tsize; /* size of text (clicks) */
37: clicks_t p_dsize; /* size of data space (clicks) */
38: clicks_t p_ssize; /* copy of stack size (clicks) */
39: clicks_t p_rssize; /* current resident set size in clicks */
40: clicks_t p_maxrss; /* copy of u.u_limit[MAXRSS] */
41: clicks_t p_swrss; /* resident set size before last swap */
42: swblk_t p_swaddr; /* disk address of u area when swapped */
43: caddr_t p_wchan; /* event process is awaiting */
44: struct text *p_textp; /* pointer to text structure */
45: unsigned short p_clktim; /* time to alarm clock signal */
46: unsigned short p_tsleep; /* time to tsleep */
47: struct pte *p_p0br; /* page table base P0BR */
48: struct proc *p_xlink; /* linked list of procs sharing same text */
49: short p_cpticks; /* ticks of cpu time (only for p_pctcpu) */
50: float p_pctcpu; /* %cpu for ps (only) */
51: short Jp_ndx; /* proc index for memall (because of vfork) */
52: short Jp_idhash; /* hashed based on p_pid for kill+exit+... */
53: struct proc *p_pptr; /* pointer to process structure of parent */
54: struct inode *p_trace; /* inode for tracing, see proca.c */
55: };
56:
57: #ifdef KERNEL
58: /*
59: * temporary expedient to clean up p_siga0/p_siga1 mess
60: */
61: #define P_SETDFL(p, mask) (p->p_siga0&=~(mask),p->p_siga1&=~(mask))
62: #define P_SETIGN(p, mask) (p->p_siga0|=(mask),p->p_siga1&=~(mask))
63: #define P_SETCATCH(p, mask) (p->p_siga0&=~(mask),p->p_siga1|=(mask))
64: #define P_SETHOLD(p, mask) (p->p_siga0|=(mask),p->p_siga1|=(mask))
65:
66: #define P_SIGVAL(p, mask) ((int(*)())\
67: (((p->p_siga0&(mask))!=0)|(((p->p_siga1&(mask))!=0)<<1)))
68:
69: #define SIGMASK(sig) (1<<((sig)-1))
70: extern struct proc proc[];
71: extern int proccnt;
72: extern struct proc *procNPROC; /* high water mark */
73: struct proc *pfind();
74:
75: #define NQS 32 /* 32 run queues */
76: struct prochd {
77: struct proc *ph_link; /* linked list of running processes */
78: struct proc *ph_rlink;
79: } qs[NQS];
80: int whichqs; /* bit mask summarizing non-empty qs's */
81: #endif
82:
83: /* stat codes */
84: #define SSLEEP 1 /* awaiting an event */
85: #define SWAIT 2 /* (abandoned state) */
86: #define SRUN 3 /* running */
87: #define SIDL 4 /* intermediate state in process creation */
88: #define SZOMB 5 /* intermediate state in process termination */
89: #define SSTOP 6 /* process being traced */
90:
91: /* flag codes */
92: #define SLOAD 0x00000001 /* in core */
93: #define SSYS 0x00000002 /* swapper or pager process */
94: #define SLOCK 0x00000004 /* process being swapped out */
95: #define SSWAP 0x00000008 /* save area flag */
96: #define STRC 0x00000010 /* process is being traced */
97: #define SWTED 0x00000020 /* another tracing flag */
98: #define SULOCK 0x00000040 /* user settable lock in core */
99: #define SPAGE 0x00000080 /* process in page wait state */
100: #define SKEEP 0x00000100 /* another flag to prevent swap out */
101: #define SDLYU 0x00000200 /* delayed unlock of pages */
102: #define SWEXIT 0x00000400 /* working on exiting */
103: #define SPHYSIO 0x00000800 /* doing physical i/o (bio.c) */
104: #define SPAGI 0x00008000 /* init data space on demand, from inode */
105: #define SSEQL 0x00010000 /* user warned of sequential vm behavior */
106: #define SUANOM 0x00020000 /* user warned of random vm behavior */
107: #define STIMO 0x00040000 /* timing out during sleep */
108: #define SOWEUPC 0x00200000 /* owe process an addupc() call at next ast */
109: #define SSEL 0x00400000 /* selecting: wakeup/waiting danger */
110: #define SPROCTR 0x00800000 /* tracing via /proc */
111: #define SPROCIO 0x01000000 /* doing I/O via /proc, so don't swap */
112: #define SSEXEC 0x02000000 /* stop on exec */
113: #define SPROCWT 0x04000000 /* wanted by /proc after SPAGE */
114:
115: #define PTRACED(p) ((p)->p_trace || ((p)->p_flag&(STRC|SPROCTR|SSEXEC)))
116:
117: /*
118: * special system process IDs
119: * it is assumed that proc[syspid].p_pid == syspid
120: */
121: #define SWAPPID 0 /* swapper */
122: #define INITPID 1 /* init; user process, but still special */
123: #define PAGEPID 2 /* pageout daemon */
124: #define SYSPIDS 3 /* number of system pids */
125:
126: /*
127: * parallel proc structure
128: * to replace part with times
129: * to be passed to parent process
130: * in ZOMBIE state.
131: *
132: * THIS SHOULD BE DONE WITH A union() CONSTRUCTION
133: */
134: struct xproc
135: {
136: struct proc *xp_link;
137: struct proc *xp_rlink;
138: struct pte *xp_addr;
139: char xp_usrpri;
140: char xp_pri; /* priority, negative is high */
141: char xp_cpu; /* cpu usage for scheduling */
142: char xp_stat;
143: char xp_time; /* resident time for scheduling */
144: char xp_nice; /* nice for cpu usage */
145: char xp_slptime;
146: char xp_cursig;
147: long xp_sig; /* signals pending to this process */
148: long xp_siga0;
149: long xp_siga1;
150: int xp_flag;
151: short xp_uid; /* user id, used to direct tty signals */
152: short xp_pgrp; /* name of process group leader */
153: short xp_pid; /* unique process id */
154: short xp_ppid; /* process id of parent */
155: void *Jxp_lnode; /* per-user scheduling */
156: float Jxp_sharepri; /* priority based on p_nice and p_lnode->kl.l_usage */
157: short xp_xstat; /* Exit status for wait */
158: struct vtimes xp_vm;
159: };
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