[src/trunk]: src/usr.bin/make make(1): add error handling for edge case in ma...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4d783e52d9b1
branches:  trunk
changeset: 958787:4d783e52d9b1
user:      rillig <rillig%NetBSD.org@localhost>
date:      Tue Jan 19 18:13:37 2021 +0000

description:
make(1): add error handling for edge case in malformed conditions

diffstat:

 usr.bin/make/cond.c                 |  10 ++++++----
 usr.bin/make/unit-tests/cond-op.exp |   4 ++--
 usr.bin/make/unit-tests/cond-op.mk  |  10 +++++-----
 3 files changed, 13 insertions(+), 11 deletions(-)

diffs (82 lines):

diff -r dc23f25dc8f8 -r 4d783e52d9b1 usr.bin/make/cond.c
--- a/usr.bin/make/cond.c       Tue Jan 19 18:09:12 2021 +0000
+++ b/usr.bin/make/cond.c       Tue Jan 19 18:13:37 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cond.c,v 1.237 2021/01/19 17:57:07 rillig Exp $        */
+/*     $NetBSD: cond.c,v 1.238 2021/01/19 18:13:37 rillig Exp $        */
 
 /*
  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@@ -95,7 +95,7 @@
 #include "dir.h"
 
 /*     "@(#)cond.c     8.2 (Berkeley) 1/2/94"  */
-MAKE_RCSID("$NetBSD: cond.c,v 1.237 2021/01/19 17:57:07 rillig Exp $");
+MAKE_RCSID("$NetBSD: cond.c,v 1.238 2021/01/19 18:13:37 rillig Exp $");
 
 /*
  * The parsing of conditional expressions is based on this grammar:
@@ -980,7 +980,8 @@
                        if (l == TOK_TRUE) {
                                l = CondParser_Factor(par, doEval);
                        } else {
-                               (void)CondParser_Factor(par, FALSE);
+                               if (CondParser_Factor(par, FALSE) == TOK_ERROR)
+                                       return TOK_ERROR;
                        }
                } else {
                        /*
@@ -1023,7 +1024,8 @@
                        if (l == TOK_FALSE) {
                                l = CondParser_Expr(par, doEval);
                        } else {
-                               (void)CondParser_Expr(par, FALSE);
+                               if (CondParser_Expr(par, FALSE) == TOK_ERROR)
+                                       return TOK_ERROR;
                        }
                } else {
                        /*
diff -r dc23f25dc8f8 -r 4d783e52d9b1 usr.bin/make/unit-tests/cond-op.exp
--- a/usr.bin/make/unit-tests/cond-op.exp       Tue Jan 19 18:09:12 2021 +0000
+++ b/usr.bin/make/unit-tests/cond-op.exp       Tue Jan 19 18:13:37 2021 +0000
@@ -12,8 +12,8 @@
 make: "cond-op.mk" line 93: 1 1 0   =>   0               1             1
 make: "cond-op.mk" line 93: 1 1 1   =>   1               1             1
 make: "cond-op.mk" line 104: Malformed conditional (1 &&)
-make: "cond-op.mk" line 115: Missing argument for ".error"
-make: "cond-op.mk" line 121: Missing argument for ".error"
+make: "cond-op.mk" line 112: Malformed conditional (0 &&)
+make: "cond-op.mk" line 120: Malformed conditional (1 ||)
 make: "cond-op.mk" line 129: Malformed conditional (0 ||)
 make: Fatal errors encountered -- cannot continue
 make: stopped in unit-tests
diff -r dc23f25dc8f8 -r 4d783e52d9b1 usr.bin/make/unit-tests/cond-op.mk
--- a/usr.bin/make/unit-tests/cond-op.mk        Tue Jan 19 18:09:12 2021 +0000
+++ b/usr.bin/make/unit-tests/cond-op.mk        Tue Jan 19 18:13:37 2021 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: cond-op.mk,v 1.11 2021/01/19 18:09:12 rillig Exp $
+# $NetBSD: cond-op.mk,v 1.12 2021/01/19 18:13:37 rillig Exp $
 #
 # Tests for operators like &&, ||, ! in .if conditions.
 #
@@ -107,16 +107,16 @@
 .  error
 .endif
 
-# FIXME: Don't accept this condition as syntactically valid.
-# FIXME: CondParser_Factor, (void).
+# This obviously malformed condition was not detected as such before cond.c
+# 1.238 from 2021-01-19.
 .if 0 &&
 .  error
 .else
 .  error
 .endif
 
-# FIXME: Don't accept this condition as syntactically valid.
-# FIXME: CondParser_Expr, (void).
+# This obviously malformed condition was not detected as such before cond.c
+# 1.238 from 2021-01-19.
 .if 1 ||
 .  error
 .else