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Annotation of 43BSD/ucb/pascal/pdx/breakpoint/bp.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)bp.c       5.1 (Berkeley) 6/5/85";
        !             9: #endif not lint
        !            10: 
        !            11: /*
        !            12:  * Direct management of bpinfo structures.
        !            13:  */
        !            14: 
        !            15: #include "defs.h"
        !            16: #include "breakpoint.h"
        !            17: #include "tree.h"
        !            18: #include "sym.h"
        !            19: #include "main.h"
        !            20: #include "source.h"
        !            21: #include "object.h"
        !            22: #include "bp.rep"
        !            23: 
        !            24: unsigned int uniqueid;
        !            25: 
        !            26: /*
        !            27:  * Add a breakpoint to the list, return a pointer to it.
        !            28:  */
        !            29: 
        !            30: BPINFO *newbp(addr, type, block, cond, node, line)
        !            31: ADDRESS addr;
        !            32: BPTYPE type;
        !            33: SYM *block;
        !            34: NODE *cond;
        !            35: NODE *node;
        !            36: LINENO line;
        !            37: {
        !            38:        register BPINFO *p;
        !            39: 
        !            40:        p = alloc(1, BPINFO);
        !            41:        p->bpid = ++uniqueid;
        !            42:        p->bpaddr = addr;
        !            43:        p->bptype = type;
        !            44:        p->bpblock = block;
        !            45:        p->bpcond = cond;
        !            46:        p->bpnode = node;
        !            47:        p->bpline = line;
        !            48:        p->bpnext = bphead;
        !            49:        if (option('b')) {
        !            50:                printf("new bp (%d) at %d, type %d\n", p->bpid, p->bpaddr, p->bptype);
        !            51:                fflush(stdout);
        !            52:        }
        !            53:        bphead = p;
        !            54:        return(p);
        !            55: }
        !            56: 
        !            57: /*
        !            58:  * Add a breakpoint, but don't return anything.
        !            59:  * Just for folks outside of "breakpoint" who don't know that
        !            60:  * a BPINFO exists.
        !            61:  */
        !            62: 
        !            63: addbp(addr, type, block, cond, node, line)
        !            64: ADDRESS addr;
        !            65: BPTYPE type;
        !            66: SYM *block;
        !            67: NODE *cond;
        !            68: NODE *node;
        !            69: LINENO line;
        !            70: {
        !            71:        BPINFO *p;
        !            72: 
        !            73:        p = newbp(addr, type, block, cond, node, line);
        !            74: }
        !            75: 
        !            76: /*
        !            77:  * Delete a breakpoint.
        !            78:  *
        !            79:  * Print out a cryptic error message if it can't be found.
        !            80:  */
        !            81: 
        !            82: delbp(id)
        !            83: unsigned int id;
        !            84: {
        !            85:        register BPINFO *p, *last;
        !            86: 
        !            87:        last = NIL;
        !            88:        for (p = bphead; p != NIL; p = p->bpnext) {
        !            89:                if (p->bpid == id) {
        !            90:                        break;
        !            91:                }
        !            92:                last = p;
        !            93:        }
        !            94:        if (p == NIL) {
        !            95:                error("%d unknown", id);
        !            96:        }
        !            97:        switch (p->bptype) {
        !            98:                case ALL_ON:
        !            99:                        if (p->bpline >= 0) {
        !           100:                                tracing--;
        !           101:                        } else {
        !           102:                                inst_tracing--;
        !           103:                        }
        !           104:                        break;
        !           105: 
        !           106:                case STOP_ON:
        !           107:                        var_tracing--;
        !           108:                        break;
        !           109:                
        !           110:                default:
        !           111:                        /* do nothing */
        !           112:                        break;
        !           113:        }
        !           114:        if (last == NIL) {
        !           115:                bphead = p->bpnext;
        !           116:        } else {
        !           117:                last->bpnext = p->bpnext;
        !           118:        }
        !           119:        tfree(p->bpcond);
        !           120:        tfree(p->bpnode);
        !           121:        dispose(p);
        !           122: }
        !           123: 
        !           124: /*
        !           125:  * Free all storage in the breakpoint table.
        !           126:  */
        !           127: 
        !           128: bpfree()
        !           129: {
        !           130:        register BPINFO *p, *next;
        !           131: 
        !           132:        fixbps();
        !           133:        for (p = bphead; p != NIL; p = next) {
        !           134:                next = p->bpnext;
        !           135:                tfree(p->bpcond);
        !           136:                tfree(p->bpnode);
        !           137:                dispose(p);
        !           138:        }
        !           139:        bphead = NIL;
        !           140: }

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