Commit | Line | Data |
---|---|---|
9ca002ef BJ |
1 | static char sccsid[] = "@(#)pcs.c 4.1 %G%"; |
2 | # | |
3 | /* | |
4 | * | |
5 | * UNIX debugger | |
6 | * | |
7 | */ | |
8 | ||
9 | #include "defs.h" | |
10 | ||
11 | ||
12 | MSG NOBKPT; | |
13 | MSG SZBKPT; | |
14 | MSG EXBKPT; | |
15 | MSG NOPCS; | |
16 | MSG BADMOD; | |
17 | ||
18 | /* breakpoints */ | |
19 | BKPTR bkpthead; | |
20 | ||
21 | CHAR lastc; | |
22 | struct user u; | |
23 | ||
24 | INT signo; | |
25 | L_INT dot; | |
26 | INT pid; | |
27 | L_INT cntval; | |
28 | L_INT loopcnt; | |
29 | ||
30 | ||
31 | ||
32 | /* sub process control */ | |
33 | ||
34 | subpcs(modif) | |
35 | { | |
36 | REG INT check; | |
37 | INT execsig,runmode; | |
38 | REG BKPTR bkptr; | |
39 | STRING comptr; | |
40 | execsig=0; loopcnt=cntval; | |
41 | ||
42 | switch (modif) { | |
43 | ||
44 | /* delete breakpoint */ | |
45 | case 'd': case 'D': | |
46 | IF (bkptr=scanbkpt(dot)) | |
47 | THEN bkptr->flag=0; return; | |
48 | ELSE error(NOBKPT); | |
49 | FI | |
50 | ||
51 | /* set breakpoint */ | |
52 | case 'b': case 'B': | |
53 | IF (bkptr=scanbkpt(dot)) | |
54 | THEN bkptr->flag=0; | |
55 | FI | |
56 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
57 | DO IF bkptr->flag == 0 | |
58 | THEN break; | |
59 | FI | |
60 | OD | |
61 | IF bkptr==0 | |
62 | THEN IF (bkptr=(BKPTR) sbrk(sizeof *bkptr)) == (BKPTR) -1 | |
63 | THEN error(SZBKPT); | |
64 | ELSE bkptr->nxtbkpt=bkpthead; | |
65 | bkpthead=bkptr; | |
66 | FI | |
67 | FI | |
68 | bkptr->loc = dot; | |
69 | bkptr->initcnt = bkptr->count = cntval; | |
70 | bkptr->flag = BKPTSET; | |
71 | check=MAXCOM-1; comptr=bkptr->comm; /* rdc(); */ | |
72 | REP *comptr++ = readchar(); | |
73 | PER check-- ANDF lastc!=EOR DONE | |
74 | *comptr=0; | |
75 | IF check | |
76 | THEN return; | |
77 | ELSE error(EXBKPT); | |
78 | FI | |
79 | ||
80 | /* exit */ | |
81 | case 'k' :case 'K': | |
82 | IF pid | |
83 | THEN printf("%d: killed", pid); endpcs(); return; | |
84 | FI | |
85 | error(NOPCS); | |
86 | ||
87 | /* run program */ | |
88 | case 'r': case 'R': | |
89 | endpcs(); | |
90 | setup(); runmode=CONTIN; | |
91 | break; | |
92 | ||
93 | /* single step */ | |
94 | case 's': case 'S': | |
95 | IF pid | |
96 | THEN | |
97 | runmode=SINGLE; execsig=getsig(signo); | |
98 | ELSE setup(); loopcnt--; | |
99 | FI | |
100 | break; | |
101 | ||
102 | /* continue with optional signal */ | |
103 | case 'c': case 'C': case 0: | |
104 | IF pid==0 THEN error(NOPCS); FI | |
105 | runmode=CONTIN; execsig=getsig(signo); | |
106 | break; | |
107 | ||
108 | default: error(BADMOD); | |
109 | } | |
110 | ||
111 | runpcs(runmode,execsig); | |
112 | delbp(); | |
113 | } | |
114 |