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Annotation of 43BSDReno/pgrm/dbx/debug.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)debug.c    5.3 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: /*
        !            25:  *  Debug routines
        !            26:  */
        !            27: 
        !            28: #include "defs.h"
        !            29: #include "tree.h"
        !            30: #include "operators.h"
        !            31: #include "eval.h"
        !            32: #include "events.h"
        !            33: #include "symbols.h"
        !            34: #include "scanner.h"
        !            35: #include "source.h"
        !            36: #include "object.h"
        !            37: #include "main.h"
        !            38: #include "mappings.h"
        !            39: #include "process.h"
        !            40: #include "machine.h"
        !            41: #include "debug.h"
        !            42: #include <signal.h>
        !            43: 
        !            44: public boolean tracetree;      /* trace building of parse trees */
        !            45: public boolean traceeval;      /* trace tree evaluation */
        !            46: 
        !            47: /*
        !            48:  * Dynamically turn on/off a debug flag, or display some information.
        !            49:  */
        !            50: 
        !            51: public debug (p)
        !            52: Node p;
        !            53: {
        !            54:     int code;
        !            55: 
        !            56:     code = p->value.lcon;
        !            57:     switch (code) {
        !            58:        case 0:
        !            59:            puts("debugging flags:");
        !            60:            puts("    1        trace scanner return values");
        !            61:            puts("    2        trace breakpoints");
        !            62:            puts("    3        trace execution");
        !            63:            puts("    4        trace tree building");
        !            64:            puts("    5        trace tree evaluation");
        !            65:            puts("   -[12345]  turns off corresponding flag");
        !            66:            puts("    6        dump function table");
        !            67:            break;
        !            68: 
        !            69:        case 1:
        !            70:        case -1:
        !            71: #           ifdef LEXDEBUG
        !            72:                lexdebug = (boolean) (code > 0);
        !            73: #           else
        !            74:                error("can't debug scanner (not compiled with LEXDEBUG)");
        !            75: #           endif
        !            76:            break;
        !            77: 
        !            78:        case 2:
        !            79:        case -2:
        !            80:            tracebpts = (boolean) (code > 0);
        !            81:            break;
        !            82: 
        !            83:        case 3:
        !            84:        case -3:
        !            85:            traceexec = (boolean) (code > 0);
        !            86:            break;
        !            87: 
        !            88:        case 4:
        !            89:        case -4:
        !            90:            tracetree = (boolean) (code > 0);
        !            91:            break;
        !            92: 
        !            93:        case 5:
        !            94:        case -5:
        !            95:            traceeval = (boolean) (code > 0);
        !            96:            break;
        !            97: 
        !            98:        case 6:
        !            99:            dumpfunctab();
        !           100:            break;
        !           101: 
        !           102:        default:
        !           103:            error("unknown debug flag");
        !           104:            break;
        !           105:     }
        !           106: }
        !           107: 
        !           108: private String leafname[] = {
        !           109:     "nop", "name", "sym", "lcon", "fcon", "scon", "rval", "index"
        !           110: };
        !           111: 
        !           112: public String opname (op)
        !           113: Operator op;
        !           114: {
        !           115:     String s;
        !           116:     static char buf[100];
        !           117: 
        !           118:     switch (op) {
        !           119:        case O_ITOF:
        !           120:            s = "itof";
        !           121:            break;
        !           122: 
        !           123:        case O_ENDX:
        !           124:            s = "endx";
        !           125:            break;
        !           126: 
        !           127:        case O_QLINE:
        !           128:            s = "qline";
        !           129:            break;
        !           130: 
        !           131:        default:
        !           132:            if (ord(op) <= ord(O_INDEX)) {
        !           133:                s = leafname[ord(op)];
        !           134:            } else {
        !           135:                s = opinfo[ord(op)].opstring;
        !           136:                if (s == nil) {
        !           137:                    sprintf(buf, "[op %d]", op);
        !           138:                    s = buf;
        !           139:                }
        !           140:            }
        !           141:            break;
        !           142:     }
        !           143:     return s;
        !           144: }

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