Commit | Line | Data |
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26de6110 SL |
1 | #ifndef lint |
2 | static char sccsid[] = "@(#)pcs.c 1.1 (Berkeley) %G%"; | |
3 | #endif | |
4 | ||
5 | /* | |
6 | * | |
7 | * UNIX debugger | |
8 | * | |
9 | */ | |
10 | ||
11 | #include "defs.h" | |
12 | ||
13 | ||
14 | MSG NOBKPT; | |
15 | MSG SZBKPT; | |
16 | MSG EXBKPT; | |
17 | MSG NOPCS; | |
18 | MSG BADMOD; | |
19 | ||
20 | /* breakpoints */ | |
21 | BKPTR bkpthead; | |
22 | ||
23 | CHAR *lp; | |
24 | CHAR lastc; | |
25 | ||
26 | INT signo; | |
27 | L_INT dot; | |
28 | L_INT pid; | |
29 | L_INT cntval; | |
30 | L_INT loopcnt; | |
31 | ||
32 | L_INT entrypt; | |
33 | INT adrflg; | |
34 | ||
35 | ||
36 | ||
37 | /* sub process control */ | |
38 | ||
39 | subpcs(modif) | |
40 | { | |
41 | REG check; | |
42 | REG execsig,runmode; | |
43 | REG BKPTR bkptr; | |
44 | REG STRING comptr; | |
45 | execsig=0; loopcnt=cntval; | |
46 | ||
47 | switch (modif) { | |
48 | ||
49 | /* delete breakpoint */ | |
50 | case 'd': case 'D': | |
51 | IF (bkptr=scanbkpt(dot)) | |
52 | THEN bkptr->flag=0; return; | |
53 | ELSE error(NOBKPT); | |
54 | FI | |
55 | ||
56 | /* set breakpoint */ | |
57 | case 'b': case 'B': | |
58 | IF (bkptr=scanbkpt(dot)) | |
59 | THEN bkptr->flag=0; | |
60 | FI | |
61 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
62 | DO IF bkptr->flag == 0 | |
63 | THEN break; | |
64 | FI | |
65 | OD | |
66 | IF bkptr==0 | |
67 | THEN IF (bkptr=(BKPTR)sbrk(sizeof *bkptr)) == (BKPTR)-1 | |
68 | THEN error(SZBKPT); | |
69 | ELSE bkptr->nxtbkpt=bkpthead; | |
70 | bkpthead=bkptr; | |
71 | FI | |
72 | FI | |
73 | bkptr->loc = dot; | |
74 | bkptr->initcnt = bkptr->count = cntval; | |
75 | bkptr->flag = BKPTSET; | |
76 | check=MAXCOM-1; comptr=bkptr->comm; rdc(); lp--; | |
77 | REP *comptr++ = readchar(); | |
78 | PER check-- ANDF lastc!=EOR DONE | |
79 | *comptr=0; lp--; | |
80 | IF check | |
81 | THEN return; | |
82 | ELSE error(EXBKPT); | |
83 | FI | |
84 | ||
85 | /* exit */ | |
86 | case 'k' :case 'K': | |
87 | IF pid | |
88 | THEN printf("%d: killed", pid); endpcs(); return; | |
89 | FI | |
90 | error(NOPCS); | |
91 | ||
92 | /* run program */ | |
93 | case 'r': case 'R': | |
94 | endpcs(); | |
95 | setup(); runmode=CONTIN; | |
96 | /* | |
97 | IF adrflg | |
98 | THEN IF !scanbkpt(dot) THEN loopcnt++; FI | |
99 | ELSE IF !scanbkpt(entrypt+2) THEN loopcnt++; FI | |
100 | FI | |
101 | */ | |
102 | break; | |
103 | ||
104 | /* single step */ | |
105 | case 's': case 'S': | |
106 | IF pid | |
107 | THEN | |
108 | runmode=SINGLE; execsig=getsig(signo); | |
109 | ELSE setup(); loopcnt--; | |
110 | FI | |
111 | break; | |
112 | ||
113 | /* continue with optional signal */ | |
114 | case 'c': case 'C': case 0: | |
115 | IF pid==0 THEN error(NOPCS); FI | |
116 | runmode=CONTIN; execsig=getsig(signo); | |
117 | break; | |
118 | ||
119 | default: error(BADMOD); | |
120 | } | |
121 | ||
122 | IF loopcnt>0 ANDF runpcs(runmode,execsig) | |
123 | THEN printf("breakpoint%16t"); | |
124 | ELSE printf("stopped at%16t"); | |
125 | FI | |
126 | delbp(); | |
127 | printpc(); | |
128 | } | |
129 |