Commit | Line | Data |
---|---|---|
54ee7326 BJ |
1 | # |
2 | /* | |
3 | * | |
4 | * UNIX debugger | |
5 | * | |
6 | */ | |
7 | ||
8 | #include "defs.h" | |
9 | SCCSID(@(#)pcs.c 2.3); | |
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 *lp; | |
22 | CHAR lastc; | |
23 | struct user u; | |
24 | ||
25 | INT signo; | |
26 | L_INT dot; | |
27 | INT pid; | |
28 | L_INT cntval; | |
29 | L_INT loopcnt; | |
30 | ||
31 | ||
32 | ||
33 | /* sub process control */ | |
34 | ||
35 | subpcs(modif) | |
36 | { | |
37 | REG INT check; | |
38 | INT execsig,runmode; | |
39 | REG BKPTR bkptr; | |
40 | STRING comptr; | |
41 | execsig=0; loopcnt=cntval; | |
42 | ||
43 | switch (modif) { | |
44 | ||
45 | /* delete breakpoint */ | |
46 | case 'd': case 'D': | |
47 | IF (bkptr=scanbkpt(dot)) | |
48 | THEN bkptr->flag=0; return; | |
49 | ELSE error(NOBKPT); | |
50 | FI | |
51 | ||
52 | /* set breakpoint */ | |
53 | case 'b': case 'B': | |
54 | IF (bkptr=scanbkpt(dot)) | |
55 | THEN bkptr->flag=0; | |
56 | FI | |
57 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
58 | DO IF bkptr->flag == 0 | |
59 | THEN break; | |
60 | FI | |
61 | OD | |
62 | IF bkptr==0 | |
63 | THEN IF (bkptr=sbrk(sizeof *bkptr)) == -1 | |
64 | THEN error(SZBKPT); | |
65 | ELSE bkptr->nxtbkpt=bkpthead; | |
66 | bkpthead=bkptr; | |
67 | FI | |
68 | FI | |
69 | bkptr->loc = dot; | |
70 | bkptr->initcnt = bkptr->count = cntval; | |
71 | bkptr->flag = BKPTSET; | |
72 | check=MAXCOM-1; comptr=bkptr->comm; rdc(); lp--; | |
73 | REP *comptr++ = readchar(); | |
74 | PER check-- ANDF lastc!=EOR DONE | |
75 | *comptr=0; lp--; | |
76 | IF check | |
77 | THEN return; | |
78 | ELSE error(EXBKPT); | |
79 | FI | |
80 | ||
81 | /* exit */ | |
82 | case 'k' :case 'K': | |
83 | IF pid | |
84 | THEN printf("%d: killed", pid); endpcs(); return; | |
85 | FI | |
86 | error(NOPCS); | |
87 | ||
88 | /* run program */ | |
89 | case 'r': case 'R': | |
90 | endpcs(); | |
91 | setup(); runmode=CONTIN; | |
92 | break; | |
93 | ||
94 | /* single step */ | |
95 | case 's': case 'S': | |
96 | IF pid | |
97 | THEN | |
98 | runmode=SINGLE; execsig=getsig(signo); | |
99 | ELSE setup(); loopcnt--; | |
100 | FI | |
101 | break; | |
102 | ||
103 | /* continue with optional signal */ | |
104 | case 'c': case 'C': case 0: | |
105 | IF pid==0 THEN error(NOPCS); FI | |
106 | runmode=CONTIN; execsig=getsig(signo); | |
107 | break; | |
108 | ||
109 | default: error(BADMOD); | |
110 | } | |
111 | ||
112 | IF loopcnt>0 ANDF runpcs(runmode,execsig) | |
113 | THEN printf("breakpoint%16t"); | |
114 | ELSE printf("stopped at%16t"); | |
115 | FI | |
116 | delbp(); | |
117 | printpc(); | |
118 | } | |
119 |