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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: struct proc
10: {
11: struct proc *p_link; /* linked list of running processes */
12: struct proc *p_rlink; /* (used by hardware q instructions) */
13: struct pte *p_addr; /* u-area kernel map address */
14: char p_usrpri; /* user-priority based on p_cpu and p_nice */
15: char p_pri; /* priority, negative is high */
16: char p_cpu; /* cpu usage for scheduling */
17: char p_stat;
18: char p_time; /* resident time for scheduling */
19: char p_nice; /* nice for cpu usage */
20: char p_slptime; /* time since last block */
21: char p_cursig;
22: long p_sig; /* signals pending to this process */
23: long p_siga0; /* low bit of 2 bit signal action */
24: long p_siga1; /* high bit of 2 bit signal action */
25: #define p_ignsig p_siga0 /* ignored signal mask */
26: int p_flag;
27: short p_uid; /* user id, used to direct tty signals */
28: short p_pgrp; /* name of process group leader */
29: short p_pid; /* unique process id */
30: short p_ppid; /* process id of parent */
31: short p_poip; /* count of page outs in progress */
32: short p_szpt; /* copy of page table size */
33: size_t p_tsize; /* size of text (clicks) */
34: size_t p_dsize; /* size of data space (clicks) */
35: size_t p_ssize; /* copy of stack size (clicks) */
36: size_t p_rssize; /* current resident set size in clicks */
37: size_t p_maxrss; /* copy of u.u_limit[MAXRSS] */
38: size_t p_swrss; /* resident set size before last swap */
39: swblk_t p_swaddr; /* disk address of u area when swapped */
40: caddr_t p_wchan; /* event process is awaiting */
41: struct text *p_textp; /* pointer to text structure */
42: u_short p_clktim; /* time to alarm clock signal */
43: u_short p_tsleep; /* time to tsleep */
44: struct pte *p_p0br; /* page table base P0BR */
45: struct proc *p_xlink; /* linked list of procs sharing same text */
46: short p_cpticks; /* ticks of cpu time */
47: float p_pctcpu; /* %cpu for this process during p_time */
48: short p_ndx; /* proc index for memall (because of vfork) */
49: short p_idhash; /* hashed based on p_pid for kill+exit+... */
50: struct proc *p_pptr; /* pointer to process structure of parent */
51: struct inode *p_trace; /* inode for new process tracing stuff */
52: };
53:
54: #define PIDHSZ 63
55: #define PIDHASH(pid) ((pid) % PIDHSZ)
56:
57: #ifdef KERNEL
58: short pidhash[PIDHSZ];
59:
60: struct proc *pfind();
61: #endif
62:
63: #ifdef KERNEL
64: struct proc *proc, *procNPROC; /* the proc table itself */
65: int nproc;
66:
67: #define NQS 32 /* 32 run queues */
68: struct prochd {
69: struct proc *ph_link; /* linked list of running processes */
70: struct proc *ph_rlink;
71: } qs[NQS];
72: int whichqs; /* bit mask summarizing non-empty qs's */
73: #endif
74:
75: /* stat codes */
76: #define SSLEEP 1 /* awaiting an event */
77: #define SWAIT 2 /* (abandoned state) */
78: #define SRUN 3 /* running */
79: #define SIDL 4 /* intermediate state in process creation */
80: #define SZOMB 5 /* intermediate state in process termination */
81: #define SSTOP 6 /* process being traced */
82:
83: /* flag codes */
84: #define SLOAD 0x00000001 /* in core */
85: #define SSYS 0x00000002 /* swapper or pager process */
86: #define SLOCK 0x00000004 /* process being swapped out */
87: #define SSWAP 0x00000008 /* save area flag */
88: #define STRC 0x00000010 /* process is being traced */
89: #define SWTED 0x00000020 /* another tracing flag */
90: #define SULOCK 0x00000040 /* user settable lock in core */
91: #define SPAGE 0x00000080 /* process in page wait state */
92: #define SKEEP 0x00000100 /* another flag to prevent swap out */
93: #define SDLYU 0x00000200 /* delayed unlock of pages */
94: #define SWEXIT 0x00000400 /* working on exiting */
95: #define SPHYSIO 0x00000800 /* doing physical i/o (bio.c) */
96: #define SVFORK 0x00001000 /* process resulted from vfork() */
97: #define SVFDONE 0x00002000 /* another vfork flag */
98: #define SNOVM 0x00004000 /* no vm, parent in a vfork() */
99: #define SPAGI 0x00008000 /* init data space on demand, from inode */
100: #define SSEQL 0x00010000 /* user warned of sequential vm behavior */
101: #define SUANOM 0x00020000 /* user warned of random vm behavior */
102: #define STIMO 0x00040000 /* timing out during sleep */
103: #define SDETACH 0x00080000 /* detached inherited by init */
104: #define SNUSIG 0x00100000 /* using new signal mechanism */
105: #define SOWEUPC 0x00200000 /* owe process an addupc() call at next ast */
106: #define SSEL 0x00400000 /* selecting: wakeup/waiting danger */
107: #define SPROCTR 0x00800000 /* tracing via /proc */
108: #define SPROCIO 0x01000000 /* doing I/O via /proc, so don't swap */
109: #define SSEXEC 0x02000000 /* stop on exec */
110:
111: #define PTRACED(p) ((p)->p_trace || ((p)->p_flag&(STRC|SPROCTR|SSEXEC)))
112:
113: /*
114: * parallel proc structure
115: * to replace part with times
116: * to be passed to parent process
117: * in ZOMBIE state.
118: *
119: * THIS SHOULD BE DONE WITH A union() CONSTRUCTION
120: */
121: struct xproc
122: {
123: struct proc *xp_link;
124: struct proc *xp_rlink;
125: struct pte *xp_addr;
126: char xp_usrpri;
127: char xp_pri; /* priority, negative is high */
128: char xp_cpu; /* cpu usage for scheduling */
129: char xp_stat;
130: char xp_time; /* resident time for scheduling */
131: char xp_nice; /* nice for cpu usage */
132: char xp_slptime;
133: char p_cursig;
134: int xp_sig; /* signals pending to this process */
135: int xp_siga0;
136: int xp_siga1;
137: int xp_flag;
138: short xp_uid; /* user id, used to direct tty signals */
139: short xp_pgrp; /* name of process group leader */
140: short xp_pid; /* unique process id */
141: short xp_ppid; /* process id of parent */
142: short xp_xstat; /* Exit status for wait */
143: struct vtimes xp_vm;
144: };
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