Source-Changes-HG archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
[src/trunk]: src/usr.bin/make make(1): trust that Var_Parse never returns NULL
details: https://anonhg.NetBSD.org/src/rev/fc0a62991c45
branches: trunk
changeset: 937967:fc0a62991c45
user: rillig <rillig%NetBSD.org@localhost>
date: Sat Aug 29 13:38:48 2020 +0000
description:
make(1): trust that Var_Parse never returns NULL
That function is quite long, but all its return paths lead either to the
expanded variable expression, or to var_Error or varNoError.
diffstat:
usr.bin/make/arch.c | 31 +++++++++++++++----------------
usr.bin/make/cond.c | 14 +++++++-------
usr.bin/make/parse.c | 8 ++++----
usr.bin/make/suff.c | 8 ++++----
usr.bin/make/var.c | 12 +++++-------
5 files changed, 35 insertions(+), 38 deletions(-)
diffs (262 lines):
diff -r 710f78562d38 -r fc0a62991c45 usr.bin/make/arch.c
--- a/usr.bin/make/arch.c Sat Aug 29 13:32:27 2020 +0000
+++ b/usr.bin/make/arch.c Sat Aug 29 13:38:48 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: arch.c,v 1.105 2020/08/29 12:20:17 rillig Exp $ */
+/* $NetBSD: arch.c,v 1.106 2020/08/29 13:38:48 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
*/
#ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: arch.c,v 1.105 2020/08/29 12:20:17 rillig Exp $";
+static char rcsid[] = "$NetBSD: arch.c,v 1.106 2020/08/29 13:38:48 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)arch.c 8.2 (Berkeley) 1/2/94";
#else
-__RCSID("$NetBSD: arch.c,v 1.105 2020/08/29 12:20:17 rillig Exp $");
+__RCSID("$NetBSD: arch.c,v 1.106 2020/08/29 13:38:48 rillig Exp $");
#endif
#endif /* not lint */
#endif
@@ -234,20 +234,19 @@
* so we can safely advance beyond it...
*/
int length;
- void *freeIt;
+ void *result_freeIt;
const char *result;
+ Boolean isError;
result = Var_Parse(cp, ctxt, VARE_UNDEFERR|VARE_WANTRES,
- &length, &freeIt);
- free(freeIt);
-
- if (result == var_Error) {
+ &length, &result_freeIt);
+ isError = result == var_Error;
+ free(result_freeIt);
+ if (isError)
return FALSE;
- } else {
- subLibName = TRUE;
- }
- cp += length-1;
+ subLibName = TRUE;
+ cp += length - 1;
}
}
@@ -278,17 +277,17 @@
int length;
void *freeIt;
const char *result;
+ Boolean isError;
result = Var_Parse(cp, ctxt, VARE_UNDEFERR|VARE_WANTRES,
&length, &freeIt);
+ isError = result == var_Error;
free(freeIt);
- if (result == var_Error) {
+ if (isError)
return FALSE;
- } else {
- doSubst = TRUE;
- }
+ doSubst = TRUE;
cp += length;
} else {
cp++;
diff -r 710f78562d38 -r fc0a62991c45 usr.bin/make/cond.c
--- a/usr.bin/make/cond.c Sat Aug 29 13:32:27 2020 +0000
+++ b/usr.bin/make/cond.c Sat Aug 29 13:38:48 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cond.c,v 1.105 2020/08/29 10:12:06 rillig Exp $ */
+/* $NetBSD: cond.c,v 1.106 2020/08/29 13:38:48 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@@ -70,14 +70,14 @@
*/
#ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: cond.c,v 1.105 2020/08/29 10:12:06 rillig Exp $";
+static char rcsid[] = "$NetBSD: cond.c,v 1.106 2020/08/29 13:38:48 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)cond.c 8.2 (Berkeley) 1/2/94";
#else
-__RCSID("$NetBSD: cond.c,v 1.105 2020/08/29 10:12:06 rillig Exp $");
+__RCSID("$NetBSD: cond.c,v 1.106 2020/08/29 13:38:48 rillig Exp $");
#endif
#endif /* not lint */
#endif
@@ -683,7 +683,7 @@
* TOK_TRUE if the resulting string is empty.
*/
int length;
- void *freeIt;
+ void *val_freeIt;
const char *val;
const char *cp = *linePtr;
@@ -691,7 +691,7 @@
*argPtr = NULL;
val = Var_Parse(cp - 1, VAR_CMD, doEval ? VARE_WANTRES : 0, &length,
- &freeIt);
+ &val_freeIt);
/*
* Advance *linePtr to beyond the closing ). Note that
* we subtract one because 'length' is calculated from 'cp - 1'.
@@ -699,7 +699,7 @@
*linePtr = cp - 1 + length;
if (val == var_Error) {
- free(freeIt);
+ free(val_freeIt);
return -1;
}
@@ -712,7 +712,7 @@
* true/false here.
*/
length = *val ? 2 : 1;
- free(freeIt);
+ free(val_freeIt);
return length;
}
diff -r 710f78562d38 -r fc0a62991c45 usr.bin/make/parse.c
--- a/usr.bin/make/parse.c Sat Aug 29 13:32:27 2020 +0000
+++ b/usr.bin/make/parse.c Sat Aug 29 13:38:48 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: parse.c,v 1.272 2020/08/29 12:20:17 rillig Exp $ */
+/* $NetBSD: parse.c,v 1.273 2020/08/29 13:38:48 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
*/
#ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: parse.c,v 1.272 2020/08/29 12:20:17 rillig Exp $";
+static char rcsid[] = "$NetBSD: parse.c,v 1.273 2020/08/29 13:38:48 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94";
#else
-__RCSID("$NetBSD: parse.c,v 1.272 2020/08/29 12:20:17 rillig Exp $");
+__RCSID("$NetBSD: parse.c,v 1.273 2020/08/29 13:38:48 rillig Exp $");
#endif
#endif /* not lint */
#endif
@@ -1238,7 +1238,7 @@
(void)Var_Parse(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES,
&length, &freeIt);
free(freeIt);
- cp += length-1;
+ cp += length - 1;
}
}
diff -r 710f78562d38 -r fc0a62991c45 usr.bin/make/suff.c
--- a/usr.bin/make/suff.c Sat Aug 29 13:32:27 2020 +0000
+++ b/usr.bin/make/suff.c Sat Aug 29 13:38:48 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: suff.c,v 1.135 2020/08/29 13:16:54 rillig Exp $ */
+/* $NetBSD: suff.c,v 1.136 2020/08/29 13:38:48 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
*/
#ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: suff.c,v 1.135 2020/08/29 13:16:54 rillig Exp $";
+static char rcsid[] = "$NetBSD: suff.c,v 1.136 2020/08/29 13:38:48 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)suff.c 8.4 (Berkeley) 3/21/94";
#else
-__RCSID("$NetBSD: suff.c,v 1.135 2020/08/29 13:16:54 rillig Exp $");
+__RCSID("$NetBSD: suff.c,v 1.136 2020/08/29 13:38:48 rillig Exp $");
#endif
#endif /* not lint */
#endif
@@ -1333,7 +1333,7 @@
void *freeIt;
junk = Var_Parse(cp, pgn, VARE_UNDEFERR|VARE_WANTRES,
- &len, &freeIt);
+ &len, &freeIt);
if (junk != var_Error) {
cp += len - 1;
}
diff -r 710f78562d38 -r fc0a62991c45 usr.bin/make/var.c
--- a/usr.bin/make/var.c Sat Aug 29 13:32:27 2020 +0000
+++ b/usr.bin/make/var.c Sat Aug 29 13:38:48 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: var.c,v 1.477 2020/08/29 13:16:54 rillig Exp $ */
+/* $NetBSD: var.c,v 1.478 2020/08/29 13:38:48 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
*/
#ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: var.c,v 1.477 2020/08/29 13:16:54 rillig Exp $";
+static char rcsid[] = "$NetBSD: var.c,v 1.478 2020/08/29 13:38:48 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)var.c 8.3 (Berkeley) 3/19/94";
#else
-__RCSID("$NetBSD: var.c,v 1.477 2020/08/29 13:16:54 rillig Exp $");
+__RCSID("$NetBSD: var.c,v 1.478 2020/08/29 13:38:48 rillig Exp $");
#endif
#endif /* not lint */
#endif
@@ -3079,7 +3079,6 @@
* we are not interested.
*/
int c;
- assert(rval != NULL);
if (rval[0] != '\0' &&
(c = p[rlen]) != '\0' && c != ':' && c != st.endc) {
free(freeIt);
@@ -3374,7 +3373,7 @@
* freePtr OUT: Non-NULL if caller should free *freePtr
*
* Results:
- * Returns the value of the variable expression.
+ * Returns the value of the variable expression, never NULL.
* var_Error if there was a parse error and VARE_UNDEFERR was set.
* varNoError if there was a parse error and VARE_UNDEFERR was not set.
*
@@ -3499,8 +3498,7 @@
void *freeIt;
const char *rval = Var_Parse(tstr, ctxt, eflags, &rlen,
&freeIt);
- if (rval != NULL)
- Buf_AddStr(&namebuf, rval);
+ Buf_AddStr(&namebuf, rval);
free(freeIt);
tstr += rlen - 1;
} else
Home |
Main Index |
Thread Index |
Old Index