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Annotation of 40BSD/cmd/sdb/TESTS/new, revision 1.1

1.1     ! root        1: /*
        !             2:  * These macros are used to speak ``offsets'' to the outside world,
        !             3:  * so that we can use the other source files for sdb essentially
        !             4:  * unchanged, even though they believe that we work with symbol
        !             5:  * table offsets, and we really have the whole symbol table in
        !             6:  * core and would prefer to just work with pointers into it.
        !             7:  */
        !             8: #define        sptooff(sp)     (ststart + (int)(sp) - (int)(symtab))
        !             9: #define        offtosp(off)    (&symtab[((off) - ststart) / sizeof (struct nlist))
        !            10: 
        !            11: /*
        !            12:  * Initialize the file and procedure tables.
        !            13:  *
        !            14:  * This routine rummages through the symbol table and builds tables
        !            15:  * of the files and procedures referenced there, sorting the latter
        !            16:  * table into address order.  These tables are used in the other
        !            17:  * routines defined here.
        !            18:  *
        !            19:  * NB:
        !            20:  *
        !            21:  * In this version of sdb we could well dispense with most of the
        !            22:  * fields of these tables, since we have the symbol table in core,
        !            23:  * but for compatibility for the time being we duplicate the information
        !            24:  * so older code in other sdb files will work unchanged.
        !            25:  */
        !            26: initfp()
        !            27: {
        !            28:        register struct nlist *sp;
        !            29:        register struct proct *procp;
        !            30:        register struct filet *filep;
        !            31:        struct stat stb;
        !            32:        int nfile, nproc;
        !            33:        int class;
        !            34:        extern int compar();            /* Sort routine for procedure table */
        !            35:        
        !            36:        firstdata = MAXPOS;
        !            37:        /*
        !            38:         * Since the symbol table is in core, we can afford
        !            39:         * two passes over it to avoid messy allocation strategies
        !            40:         * for these tables, who sizes are as yet unknown.
        !            41:         */
        !            42:        nfile = 0;
        !            43:        nproc = 0;
        !            44:        for (sp = symtab; sp < esymtab; sp++) switch (sp->n_type & STABMASK) {
        !            45: 
        !            46:        case N_SO:
        !            47:        case N_SOL:
        !            48:                nfile++;
        !            49:                continue;
        !            50:        case N_TEXT:
        !            51:                if (sp->n_name[0] == '_')
        !            52:                        nfile++;
        !            53:                continue;
        !            54:        case N_FUN:
        !            55:        case N_ENTRY:
        !            56:                nfile++;
        !            57:                continue;
        !            58:        }
        !            59:        files = calloc(nfile+1, sizeof (struct filet));
        !            60:        procs = calloc(nfile+1, sizeof (struct filet));
        !            61:        if (files == 0 || procs == 0) {
        !            62:                printf("Couldn't get space for file/procedure tables\n");
        !            63:                exit(1);
        !            64:        }
        !            65:        if (nfiles == 0)
        !            66:                printf("Warning: `%s' not compiled with -g\n", symfil);
        !            67:        procp = procs;
        !            68:        filep = files;
        !            69:        for (sp = symtab; sp < esymtab; sp++) {
        !            70:                class = sp->n_type & STABMASK;
        !            71:                switch (class) {
        !            72: 
        !            73:                case N_SO:
        !            74:                case N_SOL:
        !            75:                        filep->faddr = sp->n_value;
        !            76:                        filep->lineflag = (class == N_SOL);
        !            77:                        filep->stf_offset = sptooff(sp);
        !            78:                        filep->sfilename = sp->n_name;
        !            79:                        strcpy(fp, filep->sfilename);
        !            80:                        if (stat(filework, &stb) == -1)
        !            81:                                printf("Warning: `%s' not found\n",
        !            82:                                    filep->sfilename);
        !            83:                        else if (stb.st_mtime > symtime)
        !            84:                                printf("Warning: `%s' newer than `%s'\n",
        !            85:                                    filep->sfilename, symfil);
        !            86:                        filep++;
        !            87:                        break;
        !            88: 
        !            89:                case N_TEXT:
        !            90:                        if (stentry.n_name[0] != '_')
        !            91:                                break;
        !            92:                case N_FUN:
        !            93:                case N_ENTRY:
        !            94:                        procp->pname = sp->n_name;
        !            95:                        procp->paddr = sp->n_value;
        !            96:                        procp->st_offset = sptooff(sp);
        !            97:                        if (class != N_TEXT) {
        !            98:                                procp->sfptr = filep - 1;
        !            99:                                procp->lineno = so->n_desc;
        !           100:                        } else {
        !           101:                                procp->sfptr = badfile;
        !           102:                                procp->lineno = 0;
        !           103:                        }
        !           104:                        procp->entrypt = class == N_ENTRY;
        !           105:                        procp++;
        !           106:                        break;
        !           107:                }
        !           108:                if (sp->n_type & N_EXT) {
        !           109:                        if (!extstart)
        !           110:                                extstart = sp;
        !           111:                        /* THIS LOOKS WRONG !!! SHOULD BE (x || y) && z ??? */
        !           112:                        if (sp->n_type == (N_DATA+N_EXT) ||
        !           113:                            sp->n_type == (N_BSS+N_EXT) ||
        !           114:                            sp->n_value < firstdata)
        !           115:                                firstdata = sp->n_value;
        !           116:                }
        !           117:        }
        !           118:        if (filep != &files[nfile] || procp != &procs[nproc]) {
        !           119:                printf("initfp botch - tell someone\n");
        !           120:                exit(1);
        !           121:        }
        !           122:        /*
        !           123:         * Now have the file and procedure tables.
        !           124:         * Sort the procedure table, and initialize the boundary
        !           125:         * elements of the tables.
        !           126:         */
        !           127:        qsort(procs, procp-procs, sizeof procs[0], compar);
        !           128:        badproc = procp;
        !           129:        badfile = filep;
        !           130:        badproc->st_offset = esymtab;
        !           131:        badproc->sfptr = badfile;
        !           132:        badproc->pname = badfile->sfilename = "";
        !           133:        setcur(1);
        !           134: }

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