1252 lines
25 KiB
C
1252 lines
25 KiB
C
/* $NetBSD: read.c,v 1.67 2021/09/05 19:58:53 rillig Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
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* Copyright (c) 1994, 1995 Jochen Pohl
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jochen Pohl for
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* The NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if defined(__RCSID) && !defined(lint)
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__RCSID("$NetBSD: read.c,v 1.67 2021/09/05 19:58:53 rillig Exp $");
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#endif
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#include <ctype.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "lint2.h"
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/* index of current (included) source file */
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static int srcfile;
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/*
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* The array pointed to by inpfns maps the file name indices of input files
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* to the file name indices used in lint2
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*/
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static short *inpfns;
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static size_t ninpfns;
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/*
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* The array pointed to by *fnames maps file name indices to file names.
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* Indices of type short are used instead of pointers to save memory.
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*/
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const char **fnames;
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static size_t *flines;
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static size_t nfnames;
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/*
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* Types are shared (to save memory for the types itself) and accessed
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* via indices (to save memory for references to types (indices are short)).
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* To share types, an equal type must be located fast. This is done by a
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* hash table. Access by indices is done via an array of pointers to the
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* types.
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*/
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typedef struct thtab {
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const char *th_name;
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unsigned short th_idx;
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struct thtab *th_next;
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} thtab_t;
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static thtab_t **thtab; /* hash table */
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type_t **tlst; /* array for indexed access */
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static size_t tlstlen; /* length of tlst */
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static hte_t **renametab;
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/* index of current C source file (as specified at the command line) */
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static int csrcfile;
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static void inperr(const char *, ...)
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__attribute__((format(printf, 1, 2), noreturn));
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static void setsrc(const char *);
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static void setfnid(int, const char *);
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static void funccall(pos_t *, const char *);
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static void decldef(pos_t *, const char *);
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static void usedsym(pos_t *, const char *);
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static unsigned short inptype(const char *, const char **);
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static size_t gettlen(const char *, const char **);
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static unsigned short findtype(const char *, size_t, int);
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static unsigned short storetyp(type_t *, const char *, size_t, int);
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static int thash(const char *, size_t);
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static char *inpqstrg(const char *, const char **);
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static const char *inpname(const char *, const char **);
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static int getfnidx(const char *);
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static bool
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try_parse_int(const char **p, int *num)
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{
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char *end;
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*num = (int)strtol(*p, &end, 10);
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if (end == *p)
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return false;
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*p = end;
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return true;
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}
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static int
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parse_int(const char **p)
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{
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char *end;
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int n;
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n = (int)strtol(*p, &end, 10);
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if (end == *p)
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inperr("not a number: %s", *p);
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*p = end;
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return n;
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}
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static short
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parse_short(const char **p)
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{
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return (short)parse_int(p);
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}
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static void
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read_ln_line(char *line, size_t len)
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{
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const char *cp;
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int cline, isrc, iline;
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char rt;
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pos_t pos;
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flines[srcfile]++;
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if (len == 0 || line[len - 1] != '\n')
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inperr("%s", &line[len - 1]);
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line[len - 1] = '\0';
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cp = line;
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/* line number in csrcfile */
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if (!try_parse_int(&cp, &cline))
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cline = -1;
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/* record type */
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if (*cp == '\0')
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inperr("missing record type");
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rt = *cp++;
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if (rt == 'S') {
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setsrc(cp);
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return;
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}
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if (rt == 's') {
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setfnid(cline, cp);
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return;
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}
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/*
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* Index of (included) source file. If this index is
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* different from csrcfile, it refers to an included
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* file.
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*/
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isrc = parse_int(&cp);
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isrc = inpfns[isrc];
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/* line number in isrc */
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if (*cp++ != '.')
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inperr("bad line number");
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iline = parse_int(&cp);
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pos.p_src = (unsigned short)csrcfile;
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pos.p_line = (unsigned short)cline;
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pos.p_isrc = (unsigned short)isrc;
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pos.p_iline = (unsigned short)iline;
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/* process rest of this record */
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switch (rt) {
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case 'c':
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funccall(&pos, cp);
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break;
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case 'd':
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decldef(&pos, cp);
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break;
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case 'u':
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usedsym(&pos, cp);
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break;
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default:
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inperr("bad record type %c", rt);
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}
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}
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void
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readfile(const char *name)
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{
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FILE *inp;
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size_t len;
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char *line;
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if (inpfns == NULL)
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inpfns = xcalloc(ninpfns = 128, sizeof(*inpfns));
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if (fnames == NULL)
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fnames = xcalloc(nfnames = 256, sizeof(*fnames));
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if (flines == NULL)
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flines = xcalloc(nfnames, sizeof(*flines));
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if (tlstlen == 0)
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tlst = xcalloc(tlstlen = 256, sizeof(*tlst));
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if (thtab == NULL)
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thtab = xcalloc(THSHSIZ2, sizeof(*thtab));
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_inithash(&renametab);
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srcfile = getfnidx(name);
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if ((inp = fopen(name, "r")) == NULL)
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err(1, "cannot open %s", name);
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while ((line = fgetln(inp, &len)) != NULL)
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read_ln_line(line, len);
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_destroyhash(renametab);
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if (ferror(inp) != 0)
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err(1, "read error on %s", name);
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(void)fclose(inp);
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}
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static void
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inperr(const char *fmt, ...)
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{
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va_list ap;
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char buf[1024];
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va_start(ap, fmt);
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(void)vsnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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errx(1, "input file error: %s,%zu (%s)",
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fnames[srcfile], flines[srcfile], buf);
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}
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/*
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* Set the name of the C source file of the .ln file which is
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* currently read.
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*/
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static void
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setsrc(const char *cp)
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{
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csrcfile = getfnidx(cp);
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}
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/*
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* setfnid() gets as input an index as used in an input file and the
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* associated file name. If necessary, it creates a new lint2 file
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* name index for this file name and creates the mapping of the index
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* as used in the input file to the index used in lint2.
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*/
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static void
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setfnid(int fid, const char *cp)
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{
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if (fid < 0)
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inperr("bad fid");
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if ((size_t)fid >= ninpfns) {
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inpfns = xrealloc(inpfns, (ninpfns * 2) * sizeof(*inpfns));
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(void)memset(inpfns + ninpfns, 0, ninpfns * sizeof(*inpfns));
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ninpfns *= 2;
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}
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/*
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* Should always be true because indices written in the output
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* file by lint1 are always the previous index + 1.
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*/
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if ((size_t)fid >= ninpfns)
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errx(1, "internal error: setfnid()");
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inpfns[fid] = (unsigned short)getfnidx(cp);
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}
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/*
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* Process a function call record (c-record).
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*/
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static void
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funccall(pos_t *posp, const char *cp)
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{
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arginf_t *ai, **lai;
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char c;
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bool rused, rdisc;
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hte_t *hte;
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fcall_t *fcall;
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const char *name;
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fcall = xalloc(sizeof(*fcall));
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fcall->f_pos = *posp;
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/* read flags */
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rused = rdisc = false;
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lai = &fcall->f_args;
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again:
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c = *cp++;
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switch (c) {
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case 'u':
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if (rused || rdisc)
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inperr("used or discovered: %c", c);
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rused = true;
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goto again;
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case 'i':
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if (rused || rdisc)
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inperr("used or discovered: %c", c);
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goto again;
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case 'd':
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if (rused || rdisc)
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inperr("used or discovered: %c", c);
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rdisc = true;
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goto again;
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case 'z':
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case 'p':
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case 'n':
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case 's':
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ai = xalloc(sizeof(*ai));
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ai->a_num = parse_int(&cp);
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if (c == 'z') {
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ai->a_pcon = ai->a_zero = true;
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} else if (c == 'p') {
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ai->a_pcon = true;
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} else if (c == 'n') {
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ai->a_ncon = true;
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} else {
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ai->a_fmt = true;
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ai->a_fstrg = inpqstrg(cp, &cp);
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}
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*lai = ai;
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lai = &ai->a_next;
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goto again;
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default:
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cp--;
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}
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fcall->f_rused = rused;
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fcall->f_rdisc = rdisc;
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/* read name of function */
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name = inpname(cp, &cp);
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/* first look it up in the renaming table, then in the normal table */
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hte = _hsearch(renametab, name, false);
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if (hte != NULL)
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hte = hte->h_hte;
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else
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hte = hsearch(name, true);
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hte->h_used = true;
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fcall->f_type = inptype(cp, &cp);
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*hte->h_lcall = fcall;
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hte->h_lcall = &fcall->f_next;
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if (*cp != '\0')
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inperr("trailing line data: %s", cp);
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}
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static bool
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parse_function_attribute(const char **pp, sym_t *sym, bool *used)
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{
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switch (*(*pp)++) {
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case 'd':
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if (sym->s_def != NODECL)
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inperr("def");
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sym->s_def = DEF;
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break;
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case 'e':
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if (sym->s_def != NODECL)
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inperr("decl");
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sym->s_def = DECL;
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break;
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case 'i':
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if (sym->s_inline)
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inperr("inline");
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sym->s_inline = true;
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break;
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case 'o':
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if (sym->s_old_style_function)
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inperr("osdef");
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sym->s_old_style_function = true;
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break;
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case 'r':
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if (sym->s_function_has_return_value)
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inperr("r");
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sym->s_function_has_return_value = true;
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break;
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case 's':
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if (sym->s_static)
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inperr("static");
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sym->s_static = true;
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break;
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case 't':
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if (sym->s_def != NODECL)
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inperr("tdef");
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sym->s_def = TDEF;
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break;
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case 'u':
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if (*used)
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inperr("used");
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*used = true;
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break;
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case 'v':
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if (sym->s_check_only_first_args)
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inperr("v");
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sym->s_check_only_first_args = true;
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sym->s_check_num_args = parse_short(pp);
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break;
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case 'P':
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if (sym->s_printflike)
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inperr("P");
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sym->s_printflike = true;
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sym->s_printflike_arg = parse_short(pp);
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break;
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case 'S':
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if (sym->s_scanflike)
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inperr("S");
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sym->s_scanflike = true;
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sym->s_scanflike_arg = parse_short(pp);
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break;
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default:
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(*pp)--;
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return false;
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}
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return true;
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}
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|
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/*
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* Process a declaration or definition (d-record).
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*/
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static void
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decldef(pos_t *posp, const char *cp)
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{
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sym_t *symp, sym;
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char *pos1, *tname;
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bool used, renamed;
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hte_t *hte, *renamehte = NULL;
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const char *name, *newname;
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(void)memset(&sym, 0, sizeof(sym));
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sym.s_pos = *posp;
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sym.s_def = NODECL;
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used = false;
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while (parse_function_attribute(&cp, &sym, &used))
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continue;
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/* read symbol name, doing renaming if necessary */
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name = inpname(cp, &cp);
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renamed = false;
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if (*cp == 'r') {
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cp++;
|
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tname = xstrdup(name);
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newname = inpname(cp, &cp);
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|
|
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/* enter it and see if it's already been renamed */
|
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renamehte = _hsearch(renametab, tname, true);
|
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if (renamehte->h_hte == NULL) {
|
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hte = hsearch(newname, true);
|
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renamehte->h_hte = hte;
|
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renamed = true;
|
|
} else if (hte = renamehte->h_hte,
|
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strcmp(hte->h_name, newname) != 0) {
|
|
pos1 = xstrdup(mkpos(&renamehte->h_syms->s_pos));
|
|
/* %s renamed multiple times \t%s :: %s */
|
|
msg(18, tname, pos1, mkpos(&sym.s_pos));
|
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free(pos1);
|
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}
|
|
free(tname);
|
|
} else {
|
|
/* it might be a previously-done rename */
|
|
hte = _hsearch(renametab, name, false);
|
|
if (hte != NULL)
|
|
hte = hte->h_hte;
|
|
else
|
|
hte = hsearch(name, true);
|
|
}
|
|
hte->h_used |= used;
|
|
if (sym.s_def == DEF || sym.s_def == TDEF)
|
|
hte->h_def = true;
|
|
|
|
sym.s_type = inptype(cp, &cp);
|
|
|
|
/*
|
|
* Allocate memory for this symbol only if it was not already
|
|
* declared or tentatively defined at the same location with
|
|
* the same type. Works only for symbols with external linkage,
|
|
* because static symbols, tentatively defined at the same location
|
|
* but in different translation units are really different symbols.
|
|
*/
|
|
for (symp = hte->h_syms; symp != NULL; symp = symp->s_next) {
|
|
if (symp->s_pos.p_isrc == sym.s_pos.p_isrc &&
|
|
symp->s_pos.p_iline == sym.s_pos.p_iline &&
|
|
symp->s_type == sym.s_type &&
|
|
((symp->s_def == DECL && sym.s_def == DECL) ||
|
|
(!sflag && symp->s_def == TDEF && sym.s_def == TDEF)) &&
|
|
!symp->s_static && !sym.s_static) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (symp == NULL) {
|
|
if (sym.s_check_only_first_args ||
|
|
sym.s_printflike || sym.s_scanflike) {
|
|
symp = xalloc(sizeof(*symp));
|
|
*symp = sym;
|
|
} else {
|
|
/* no need to allocate memory for unused members */
|
|
symp = xalloc(sizeof(symp->s_s));
|
|
symp->s_s = sym.s_s;
|
|
}
|
|
*hte->h_lsym = symp;
|
|
hte->h_lsym = &symp->s_next;
|
|
|
|
/* XXX hack so we can remember where a symbol was renamed */
|
|
if (renamed)
|
|
renamehte->h_syms = symp;
|
|
}
|
|
|
|
if (*cp != '\0')
|
|
inperr("trailing line: %s", cp);
|
|
}
|
|
|
|
/*
|
|
* Read an u-record (emitted by lint1 if a symbol was used).
|
|
*/
|
|
static void
|
|
usedsym(pos_t *posp, const char *cp)
|
|
{
|
|
usym_t *usym;
|
|
hte_t *hte;
|
|
const char *name;
|
|
|
|
usym = xalloc(sizeof(*usym));
|
|
usym->u_pos = *posp;
|
|
|
|
/* needed as delimiter between two numbers */
|
|
if (*cp++ != 'x')
|
|
inperr("bad delim %c", cp[-1]);
|
|
|
|
name = inpname(cp, &cp);
|
|
hte = _hsearch(renametab, name, false);
|
|
if (hte != NULL)
|
|
hte = hte->h_hte;
|
|
else
|
|
hte = hsearch(name, true);
|
|
hte->h_used = true;
|
|
|
|
*hte->h_lusym = usym;
|
|
hte->h_lusym = &usym->u_next;
|
|
}
|
|
|
|
static tspec_t
|
|
parse_tspec(const char **pp, char c, bool *osdef)
|
|
{
|
|
char s;
|
|
|
|
switch (c) {
|
|
case 's': /* 'signed' or 'struct' or 'float' */
|
|
case 'u': /* 'unsigned' or 'union' */
|
|
case 'l': /* 'long double' */
|
|
case 'e': /* 'enum' */
|
|
s = c;
|
|
c = *(*pp)++;
|
|
break;
|
|
default:
|
|
s = '\0';
|
|
break;
|
|
}
|
|
|
|
switch (c) {
|
|
case 'B':
|
|
return BOOL;
|
|
case 'C':
|
|
return s == 's' ? SCHAR : (s == 'u' ? UCHAR : CHAR);
|
|
case 'S':
|
|
return s == 'u' ? USHORT : SHORT;
|
|
case 'I':
|
|
return s == 'u' ? UINT : INT;
|
|
case 'L':
|
|
return s == 'u' ? ULONG : LONG;
|
|
case 'Q':
|
|
return s == 'u' ? UQUAD : QUAD;
|
|
#ifdef INT128_SIZE
|
|
case 'J':
|
|
return s == 'u' ? UINT128 : INT128;
|
|
#endif
|
|
case 'D':
|
|
return s == 's' ? FLOAT : (s == 'l' ? LDOUBLE : DOUBLE);
|
|
case 'V':
|
|
return VOID;
|
|
case 'P':
|
|
return PTR;
|
|
case 'A':
|
|
return ARRAY;
|
|
case 'F':
|
|
case 'f':
|
|
*osdef = c == 'f';
|
|
return FUNC;
|
|
case 'T':
|
|
return s == 'e' ? ENUM : (s == 's' ? STRUCT : UNION);
|
|
case 'X':
|
|
return s == 's' ? FCOMPLEX
|
|
: (s == 'l' ? LCOMPLEX : DCOMPLEX);
|
|
default:
|
|
inperr("tspec '%c'", c);
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read a type and return the index of this type.
|
|
*/
|
|
static unsigned short
|
|
inptype(const char *cp, const char **epp)
|
|
{
|
|
char c;
|
|
const char *ep;
|
|
type_t *tp;
|
|
int narg, i;
|
|
bool osdef = false;
|
|
size_t tlen;
|
|
unsigned short tidx;
|
|
int h;
|
|
|
|
/* If we have this type already, return its index. */
|
|
tlen = gettlen(cp, &ep);
|
|
h = thash(cp, tlen);
|
|
if ((tidx = findtype(cp, tlen, h)) != 0) {
|
|
*epp = ep;
|
|
return tidx;
|
|
}
|
|
|
|
/* No, we must create a new type. */
|
|
tp = xalloc(sizeof(*tp));
|
|
|
|
tidx = storetyp(tp, cp, tlen, h);
|
|
|
|
c = *cp++;
|
|
|
|
if (c == 'c') {
|
|
tp->t_const = true;
|
|
c = *cp++;
|
|
}
|
|
if (c == 'v') {
|
|
tp->t_volatile = true;
|
|
c = *cp++;
|
|
}
|
|
|
|
tp->t_tspec = parse_tspec(&cp, c, &osdef);
|
|
|
|
switch (tp->t_tspec) {
|
|
case ARRAY:
|
|
tp->t_dim = parse_int(&cp);
|
|
tp->t_subt = TP(inptype(cp, &cp));
|
|
break;
|
|
case PTR:
|
|
tp->t_subt = TP(inptype(cp, &cp));
|
|
break;
|
|
case FUNC:
|
|
c = *cp;
|
|
if (ch_isdigit(c)) {
|
|
if (!osdef)
|
|
tp->t_proto = true;
|
|
narg = parse_int(&cp);
|
|
tp->t_args = xcalloc((size_t)narg + 1,
|
|
sizeof(*tp->t_args));
|
|
for (i = 0; i < narg; i++) {
|
|
if (i == narg - 1 && *cp == 'E') {
|
|
tp->t_vararg = true;
|
|
cp++;
|
|
} else {
|
|
tp->t_args[i] = TP(inptype(cp, &cp));
|
|
}
|
|
}
|
|
}
|
|
tp->t_subt = TP(inptype(cp, &cp));
|
|
break;
|
|
case ENUM:
|
|
tp->t_tspec = INT;
|
|
tp->t_is_enum = true;
|
|
/* FALLTHROUGH */
|
|
case STRUCT:
|
|
case UNION:
|
|
switch (*cp++) {
|
|
case '1':
|
|
tp->t_istag = true;
|
|
tp->t_tag = hsearch(inpname(cp, &cp), true);
|
|
break;
|
|
case '2':
|
|
tp->t_istynam = true;
|
|
tp->t_tynam = hsearch(inpname(cp, &cp), true);
|
|
break;
|
|
case '3':
|
|
tp->t_isuniqpos = true;
|
|
tp->t_uniqpos.p_line = parse_int(&cp);
|
|
cp++;
|
|
/* xlate to 'global' file name. */
|
|
tp->t_uniqpos.p_file =
|
|
addoutfile(inpfns[parse_int(&cp)]);
|
|
cp++;
|
|
tp->t_uniqpos.p_uniq = parse_int(&cp);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
*epp = cp;
|
|
return tidx;
|
|
}
|
|
|
|
/*
|
|
* Get the length of a type string.
|
|
*/
|
|
static size_t
|
|
gettlen(const char *cp, const char **epp)
|
|
{
|
|
const char *cp1;
|
|
char c, s;
|
|
tspec_t t;
|
|
int narg, i;
|
|
|
|
cp1 = cp;
|
|
|
|
c = *cp++;
|
|
|
|
if (c == 'c')
|
|
c = *cp++;
|
|
if (c == 'v')
|
|
c = *cp++;
|
|
|
|
switch (c) {
|
|
case 's':
|
|
case 'u':
|
|
case 'l':
|
|
case 'e':
|
|
s = c;
|
|
c = *cp++;
|
|
break;
|
|
default:
|
|
s = '\0';
|
|
break;
|
|
}
|
|
|
|
t = NOTSPEC;
|
|
|
|
switch (c) {
|
|
case 'B':
|
|
if (s == '\0')
|
|
t = BOOL;
|
|
break;
|
|
case 'C':
|
|
if (s == 's') {
|
|
t = SCHAR;
|
|
} else if (s == 'u') {
|
|
t = UCHAR;
|
|
} else if (s == '\0') {
|
|
t = CHAR;
|
|
}
|
|
break;
|
|
case 'S':
|
|
if (s == 'u') {
|
|
t = USHORT;
|
|
} else if (s == '\0') {
|
|
t = SHORT;
|
|
}
|
|
break;
|
|
case 'I':
|
|
if (s == 'u') {
|
|
t = UINT;
|
|
} else if (s == '\0') {
|
|
t = INT;
|
|
}
|
|
break;
|
|
case 'L':
|
|
if (s == 'u') {
|
|
t = ULONG;
|
|
} else if (s == '\0') {
|
|
t = LONG;
|
|
}
|
|
break;
|
|
case 'Q':
|
|
if (s == 'u') {
|
|
t = UQUAD;
|
|
} else if (s == '\0') {
|
|
t = QUAD;
|
|
}
|
|
break;
|
|
#ifdef INT128_SIZE
|
|
case 'J':
|
|
if (s == 'u') {
|
|
t = UINT128;
|
|
} else if (s == '\0') {
|
|
t = INT128;
|
|
}
|
|
break;
|
|
#endif
|
|
case 'D':
|
|
if (s == 's') {
|
|
t = FLOAT;
|
|
} else if (s == 'l') {
|
|
t = LDOUBLE;
|
|
} else if (s == '\0') {
|
|
t = DOUBLE;
|
|
}
|
|
break;
|
|
case 'V':
|
|
if (s == '\0')
|
|
t = VOID;
|
|
break;
|
|
case 'P':
|
|
if (s == '\0')
|
|
t = PTR;
|
|
break;
|
|
case 'A':
|
|
if (s == '\0')
|
|
t = ARRAY;
|
|
break;
|
|
case 'F':
|
|
case 'f':
|
|
if (s == '\0')
|
|
t = FUNC;
|
|
break;
|
|
case 'T':
|
|
if (s == 'e') {
|
|
t = ENUM;
|
|
} else if (s == 's') {
|
|
t = STRUCT;
|
|
} else if (s == 'u') {
|
|
t = UNION;
|
|
}
|
|
break;
|
|
case 'X':
|
|
if (s == 's') {
|
|
t = FCOMPLEX;
|
|
} else if (s == 'l') {
|
|
t = LCOMPLEX;
|
|
} else if (s == '\0') {
|
|
t = DCOMPLEX;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (t == NOTSPEC)
|
|
inperr("bad type: %c %c", c, s);
|
|
|
|
switch (t) {
|
|
case ARRAY:
|
|
(void)parse_int(&cp);
|
|
(void)gettlen(cp, &cp);
|
|
break;
|
|
case PTR:
|
|
(void)gettlen(cp, &cp);
|
|
break;
|
|
case FUNC:
|
|
c = *cp;
|
|
if (ch_isdigit(c)) {
|
|
narg = parse_int(&cp);
|
|
for (i = 0; i < narg; i++) {
|
|
if (i == narg - 1 && *cp == 'E') {
|
|
cp++;
|
|
} else {
|
|
(void)gettlen(cp, &cp);
|
|
}
|
|
}
|
|
}
|
|
(void)gettlen(cp, &cp);
|
|
break;
|
|
case ENUM:
|
|
case STRUCT:
|
|
case UNION:
|
|
switch (*cp++) {
|
|
case '1':
|
|
case '2':
|
|
(void)inpname(cp, &cp);
|
|
break;
|
|
case '3':
|
|
/* unique position: line.file.uniquifier */
|
|
(void)parse_int(&cp);
|
|
if (*cp++ != '.')
|
|
inperr("not dot: %c", cp[-1]);
|
|
(void)parse_int(&cp);
|
|
if (*cp++ != '.')
|
|
inperr("not dot: %c", cp[-1]);
|
|
(void)parse_int(&cp);
|
|
break;
|
|
default:
|
|
inperr("bad value: %c", cp[-1]);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
*epp = cp;
|
|
return (size_t)(cp - cp1);
|
|
}
|
|
|
|
/*
|
|
* Search a type by its type string.
|
|
*/
|
|
static unsigned short
|
|
findtype(const char *cp, size_t len, int h)
|
|
{
|
|
thtab_t *thte;
|
|
|
|
for (thte = thtab[h]; thte != NULL; thte = thte->th_next) {
|
|
if (strncmp(thte->th_name, cp, len) != 0)
|
|
continue;
|
|
if (thte->th_name[len] == '\0')
|
|
return thte->th_idx;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Store a type and its type string, so we can later share this type
|
|
* if we read the same type string from the input file.
|
|
*/
|
|
static unsigned short
|
|
storetyp(type_t *tp, const char *cp, size_t len, int h)
|
|
{
|
|
static unsigned int tidx = 1; /* 0 is reserved */
|
|
thtab_t *thte;
|
|
char *name;
|
|
|
|
if (tidx >= USHRT_MAX)
|
|
errx(1, "sorry, too many types");
|
|
|
|
if (tidx == tlstlen - 1) {
|
|
tlst = xrealloc(tlst, (tlstlen * 2) * sizeof(*tlst));
|
|
(void)memset(tlst + tlstlen, 0, tlstlen * sizeof(*tlst));
|
|
tlstlen *= 2;
|
|
}
|
|
|
|
tlst[tidx] = tp;
|
|
|
|
/* create a hash table entry */
|
|
name = xalloc(len + 1);
|
|
(void)memcpy(name, cp, len);
|
|
name[len] = '\0';
|
|
|
|
thte = xalloc(sizeof(*thte));
|
|
thte->th_name = name;
|
|
thte->th_idx = tidx;
|
|
thte->th_next = thtab[h];
|
|
thtab[h] = thte;
|
|
|
|
return (unsigned short)tidx++;
|
|
}
|
|
|
|
/*
|
|
* Hash function for types
|
|
*/
|
|
static int
|
|
thash(const char *s, size_t len)
|
|
{
|
|
unsigned int v;
|
|
|
|
v = 0;
|
|
while (len-- != 0) {
|
|
v = (v << sizeof(v)) + (unsigned char)*s++;
|
|
v ^= v >> (sizeof(v) * CHAR_BIT - sizeof(v));
|
|
}
|
|
return v % THSHSIZ2;
|
|
}
|
|
|
|
/*
|
|
* Read a string enclosed by "". This string may contain quoted chars.
|
|
*/
|
|
static char *
|
|
inpqstrg(const char *src, const char **epp)
|
|
{
|
|
char *strg, *dst;
|
|
size_t slen;
|
|
char c;
|
|
int v;
|
|
|
|
dst = strg = xmalloc(slen = 32);
|
|
|
|
if ((c = *src++) != '"')
|
|
inperr("not quote: %c", c);
|
|
if ((c = *src++) == '\0')
|
|
inperr("trailing data: %c", c);
|
|
|
|
while (c != '"') {
|
|
if (c == '\\') {
|
|
if ((c = *src++) == '\0')
|
|
inperr("missing after \\");
|
|
switch (c) {
|
|
case 'n':
|
|
c = '\n';
|
|
break;
|
|
case 't':
|
|
c = '\t';
|
|
break;
|
|
case 'v':
|
|
c = '\v';
|
|
break;
|
|
case 'b':
|
|
c = '\b';
|
|
break;
|
|
case 'r':
|
|
c = '\r';
|
|
break;
|
|
case 'f':
|
|
c = '\f';
|
|
break;
|
|
case 'a':
|
|
c = '\a';
|
|
break;
|
|
case '\\':
|
|
c = '\\';
|
|
break;
|
|
case '"':
|
|
c = '"';
|
|
break;
|
|
case '\'':
|
|
c = '\'';
|
|
break;
|
|
case '0': case '1': case '2': case '3':
|
|
v = (c - '0') << 6;
|
|
if ((c = *src++) < '0' || c > '7')
|
|
inperr("not octal: %c", c);
|
|
v |= (c - '0') << 3;
|
|
if ((c = *src++) < '0' || c > '7')
|
|
inperr("not octal: %c", c);
|
|
v |= c - '0';
|
|
c = (char)v;
|
|
break;
|
|
default:
|
|
inperr("bad \\ escape: %c", c);
|
|
}
|
|
}
|
|
/* keep space for trailing '\0' */
|
|
if ((size_t)(dst - strg) == slen - 1) {
|
|
strg = xrealloc(strg, slen * 2);
|
|
dst = strg + (slen - 1);
|
|
slen *= 2;
|
|
}
|
|
*dst++ = c;
|
|
if ((c = *src++) == '\0')
|
|
inperr("missing closing quote");
|
|
}
|
|
*dst = '\0';
|
|
|
|
*epp = src;
|
|
return strg;
|
|
}
|
|
|
|
/*
|
|
* Read the name of a symbol in static memory.
|
|
*/
|
|
static const char *
|
|
inpname(const char *cp, const char **epp)
|
|
{
|
|
static char *buf;
|
|
static size_t blen = 0;
|
|
size_t len, i;
|
|
char c;
|
|
|
|
len = parse_int(&cp);
|
|
if (len + 1 > blen)
|
|
buf = xrealloc(buf, blen = len + 1);
|
|
for (i = 0; i < len; i++) {
|
|
c = *cp++;
|
|
if (!ch_isalnum(c) && c != '_')
|
|
inperr("not alnum or _: %c", c);
|
|
buf[i] = c;
|
|
}
|
|
buf[i] = '\0';
|
|
|
|
*epp = cp;
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* Return the index of a file name. If the name cannot be found, create
|
|
* a new entry and return the index of the newly created entry.
|
|
*/
|
|
static int
|
|
getfnidx(const char *fn)
|
|
{
|
|
size_t i;
|
|
|
|
/* 0 is reserved */
|
|
for (i = 1; fnames[i] != NULL; i++) {
|
|
if (strcmp(fnames[i], fn) == 0)
|
|
return (int)i;
|
|
}
|
|
|
|
if (i == nfnames - 1) {
|
|
size_t nlen = nfnames * 2;
|
|
fnames = xrealloc(fnames, nlen * sizeof(*fnames));
|
|
(void)memset(fnames + nfnames, 0, nfnames * sizeof(*fnames));
|
|
flines = xrealloc(flines, nlen * sizeof(*flines));
|
|
(void)memset(flines + nfnames, 0, nfnames * sizeof(*flines));
|
|
nfnames = nlen;
|
|
}
|
|
|
|
fnames[i] = xstrdup(fn);
|
|
flines[i] = 0;
|
|
return (int)i;
|
|
}
|
|
|
|
/*
|
|
* Separate symbols with static and external linkage.
|
|
*/
|
|
void
|
|
mkstatic(hte_t *hte)
|
|
{
|
|
sym_t *sym1, **symp, *sym;
|
|
fcall_t **callp, *call;
|
|
usym_t **usymp, *usym;
|
|
hte_t *nhte;
|
|
bool ofnd;
|
|
|
|
/* Look for first static definition */
|
|
for (sym1 = hte->h_syms; sym1 != NULL; sym1 = sym1->s_next) {
|
|
if (sym1->s_static)
|
|
break;
|
|
}
|
|
if (sym1 == NULL)
|
|
return;
|
|
|
|
/* Do nothing if this name is used only in one translation unit. */
|
|
ofnd = false;
|
|
for (sym = hte->h_syms; sym != NULL && !ofnd; sym = sym->s_next) {
|
|
if (sym->s_pos.p_src != sym1->s_pos.p_src)
|
|
ofnd = true;
|
|
}
|
|
for (call = hte->h_calls; call != NULL && !ofnd; call = call->f_next) {
|
|
if (call->f_pos.p_src != sym1->s_pos.p_src)
|
|
ofnd = true;
|
|
}
|
|
for (usym = hte->h_usyms; usym != NULL && !ofnd; usym = usym->u_next) {
|
|
if (usym->u_pos.p_src != sym1->s_pos.p_src)
|
|
ofnd = true;
|
|
}
|
|
if (!ofnd) {
|
|
hte->h_used = true;
|
|
/* errors about undef. static symbols are printed in lint1 */
|
|
hte->h_def = true;
|
|
hte->h_static = true;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Create a new hash table entry
|
|
*
|
|
* XXX this entry should be put at the beginning of the list to
|
|
* avoid processing the same symbol twice.
|
|
*/
|
|
for (nhte = hte; nhte->h_link != NULL; nhte = nhte->h_link)
|
|
continue;
|
|
nhte->h_link = xmalloc(sizeof(*nhte->h_link));
|
|
nhte = nhte->h_link;
|
|
nhte->h_name = hte->h_name;
|
|
nhte->h_used = true;
|
|
nhte->h_def = true; /* error in lint1 */
|
|
nhte->h_static = true;
|
|
nhte->h_syms = NULL;
|
|
nhte->h_lsym = &nhte->h_syms;
|
|
nhte->h_calls = NULL;
|
|
nhte->h_lcall = &nhte->h_calls;
|
|
nhte->h_usyms = NULL;
|
|
nhte->h_lusym = &nhte->h_usyms;
|
|
nhte->h_link = NULL;
|
|
nhte->h_hte = NULL;
|
|
|
|
/*
|
|
* move all symbols used in this translation unit into the new
|
|
* hash table entry.
|
|
*/
|
|
for (symp = &hte->h_syms; (sym = *symp) != NULL; ) {
|
|
if (sym->s_pos.p_src == sym1->s_pos.p_src) {
|
|
sym->s_static = true;
|
|
(*symp) = sym->s_next;
|
|
if (hte->h_lsym == &sym->s_next)
|
|
hte->h_lsym = symp;
|
|
sym->s_next = NULL;
|
|
*nhte->h_lsym = sym;
|
|
nhte->h_lsym = &sym->s_next;
|
|
} else {
|
|
symp = &sym->s_next;
|
|
}
|
|
}
|
|
for (callp = &hte->h_calls; (call = *callp) != NULL; ) {
|
|
if (call->f_pos.p_src == sym1->s_pos.p_src) {
|
|
(*callp) = call->f_next;
|
|
if (hte->h_lcall == &call->f_next)
|
|
hte->h_lcall = callp;
|
|
call->f_next = NULL;
|
|
*nhte->h_lcall = call;
|
|
nhte->h_lcall = &call->f_next;
|
|
} else {
|
|
callp = &call->f_next;
|
|
}
|
|
}
|
|
for (usymp = &hte->h_usyms; (usym = *usymp) != NULL; ) {
|
|
if (usym->u_pos.p_src == sym1->s_pos.p_src) {
|
|
(*usymp) = usym->u_next;
|
|
if (hte->h_lusym == &usym->u_next)
|
|
hte->h_lusym = usymp;
|
|
usym->u_next = NULL;
|
|
*nhte->h_lusym = usym;
|
|
nhte->h_lusym = &usym->u_next;
|
|
} else {
|
|
usymp = &usym->u_next;
|
|
}
|
|
}
|
|
|
|
/* h_def must be recalculated for old hte */
|
|
hte->h_def = nhte->h_def = false;
|
|
for (sym = hte->h_syms; sym != NULL; sym = sym->s_next) {
|
|
if (sym->s_def == DEF || sym->s_def == TDEF) {
|
|
hte->h_def = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mkstatic(hte);
|
|
}
|