[src/trunk]: src/tests/usr.bin/xlint/lint1 tests/lint: add tests for a few mo...

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

details:   https://anonhg.NetBSD.org/src/rev/6c95b6b799c6
branches:  trunk
changeset: 960374:6c95b6b799c6
user:      rillig <rillig%NetBSD.org@localhost>
date:      Tue Mar 16 23:39:41 2021 +0000

description:
tests/lint: add tests for a few more messages

diffstat:

 tests/usr.bin/xlint/lint1/msg_031.c   |   5 +++-
 tests/usr.bin/xlint/lint1/msg_031.exp |   1 +
 tests/usr.bin/xlint/lint1/msg_151.c   |  12 +++++++--
 tests/usr.bin/xlint/lint1/msg_151.exp |   2 +-
 tests/usr.bin/xlint/lint1/msg_152.c   |  14 +++++++++--
 tests/usr.bin/xlint/lint1/msg_152.exp |   5 +++-
 tests/usr.bin/xlint/lint1/msg_154.c   |  11 ++++++--
 tests/usr.bin/xlint/lint1/msg_154.exp |   2 +-
 tests/usr.bin/xlint/lint1/msg_157.c   |   9 +++++--
 tests/usr.bin/xlint/lint1/msg_157.exp |   2 +-
 tests/usr.bin/xlint/lint1/msg_158.c   |  42 ++++++++++++++++++++++++++++++++--
 tests/usr.bin/xlint/lint1/msg_158.exp |   2 +-
 12 files changed, 86 insertions(+), 21 deletions(-)

diffs (184 lines):

diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_031.c
--- a/tests/usr.bin/xlint/lint1/msg_031.c       Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_031.c       Tue Mar 16 23:39:41 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: msg_031.c,v 1.3 2021/01/31 11:12:07 rillig Exp $       */
+/*     $NetBSD: msg_031.c,v 1.4 2021/03/16 23:39:41 rillig Exp $       */
 # 3 "msg_031.c"
 
 // Test for message: incomplete structure or union %s: %s [31]
@@ -13,3 +13,6 @@
 struct complete complete_var;
 
 struct incomplete incomplete_var;      /* expect: 31 */
+
+/* XXX: the 'incomplete: <unnamed>' in the diagnostic looks strange */
+void function(struct incomplete);      /* expect: incomplete: <unnamed> [31] */
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_031.exp
--- a/tests/usr.bin/xlint/lint1/msg_031.exp     Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_031.exp     Tue Mar 16 23:39:41 2021 +0000
@@ -1,2 +1,3 @@
+msg_031.c(18): incomplete structure or union incomplete: <unnamed> [31]
 msg_031.c(10): warning: struct incomplete never defined [233]
 msg_031.c(15): incomplete structure or union incomplete: incomplete_var [31]
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_151.c
--- a/tests/usr.bin/xlint/lint1/msg_151.c       Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_151.c       Tue Mar 16 23:39:41 2021 +0000
@@ -1,7 +1,13 @@
-/*     $NetBSD: msg_151.c,v 1.2 2021/02/21 09:07:58 rillig Exp $       */
+/*     $NetBSD: msg_151.c,v 1.3 2021/03/16 23:39:41 rillig Exp $       */
 # 3 "msg_151.c"
 
 // Test for message: void expressions may not be arguments, arg #%d [151]
 
-TODO: "Add example code that triggers the above message." /* expect: 249 */
-TODO: "Add example code that almost triggers the above message."
+void sink_int(int);
+
+void
+example(int i)
+{
+       sink_int((void)i);      /* expect: 151 */
+       sink_int(i);
+}
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_151.exp
--- a/tests/usr.bin/xlint/lint1/msg_151.exp     Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_151.exp     Tue Mar 16 23:39:41 2021 +0000
@@ -1,1 +1,1 @@
-msg_151.c(6): syntax error ':' [249]
+msg_151.c(11): void expressions may not be arguments, arg #1 [151]
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_152.c
--- a/tests/usr.bin/xlint/lint1/msg_152.c       Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_152.c       Tue Mar 16 23:39:41 2021 +0000
@@ -1,7 +1,15 @@
-/*     $NetBSD: msg_152.c,v 1.2 2021/02/21 09:07:58 rillig Exp $       */
+/*     $NetBSD: msg_152.c,v 1.3 2021/03/16 23:39:41 rillig Exp $       */
 # 3 "msg_152.c"
 
 // Test for message: argument cannot have unknown size, arg #%d [152]
 
-TODO: "Add example code that triggers the above message." /* expect: 249 */
-TODO: "Add example code that almost triggers the above message."
+struct incomplete;                     /* expect: 233 */
+
+void callee(struct incomplete);                /* expect: 31 */
+
+void
+caller(void)
+{
+       struct incomplete local_var;    /* expect: 31 */
+       callee(local_var);              /* expect: 152 */
+}
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_152.exp
--- a/tests/usr.bin/xlint/lint1/msg_152.exp     Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_152.exp     Tue Mar 16 23:39:41 2021 +0000
@@ -1,1 +1,4 @@
-msg_152.c(6): syntax error ':' [249]
+msg_152.c(8): incomplete structure or union incomplete: <unnamed> [31]
+msg_152.c(13): incomplete structure or union incomplete: local_var [31]
+msg_152.c(14): argument cannot have unknown size, arg #1 [152]
+msg_152.c(6): warning: struct incomplete never defined [233]
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_154.c
--- a/tests/usr.bin/xlint/lint1/msg_154.c       Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_154.c       Tue Mar 16 23:39:41 2021 +0000
@@ -1,7 +1,12 @@
-/*     $NetBSD: msg_154.c,v 1.2 2021/02/21 09:07:58 rillig Exp $       */
+/*     $NetBSD: msg_154.c,v 1.3 2021/03/16 23:39:41 rillig Exp $       */
 # 3 "msg_154.c"
 
 // Test for message: illegal combination of %s (%s) and %s (%s), arg #%d [154]
 
-TODO: "Add example code that triggers the above message." /* expect: 249 */
-TODO: "Add example code that almost triggers the above message."
+void sink_int(int);
+
+void
+example(int *ptr)
+{
+       sink_int(ptr);          /* expect: 154 */
+}
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_154.exp
--- a/tests/usr.bin/xlint/lint1/msg_154.exp     Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_154.exp     Tue Mar 16 23:39:41 2021 +0000
@@ -1,1 +1,1 @@
-msg_154.c(6): syntax error ':' [249]
+msg_154.c(11): warning: illegal combination of integer (int) and pointer (pointer to int), arg #1 [154]
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_157.c
--- a/tests/usr.bin/xlint/lint1/msg_157.c       Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_157.c       Tue Mar 16 23:39:41 2021 +0000
@@ -1,7 +1,10 @@
-/*     $NetBSD: msg_157.c,v 1.2 2021/02/21 09:07:58 rillig Exp $       */
+/*     $NetBSD: msg_157.c,v 1.3 2021/03/16 23:39:41 rillig Exp $       */
 # 3 "msg_157.c"
 
 // Test for message: ANSI C treats constant as unsigned [157]
 
-TODO: "Add example code that triggers the above message." /* expect: 249 */
-TODO: "Add example code that almost triggers the above message."
+/*
+ * A rather strange definition for an ARGB color.
+ * Luckily, 'double' has more than 32 significant binary digits.
+ */
+double white = 0xFFFFFFFF;     /* expect: 157 */
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_157.exp
--- a/tests/usr.bin/xlint/lint1/msg_157.exp     Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_157.exp     Tue Mar 16 23:39:41 2021 +0000
@@ -1,1 +1,1 @@
-msg_157.c(6): syntax error ':' [249]
+msg_157.c(10): warning: ANSI C treats constant as unsigned [157]
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_158.c
--- a/tests/usr.bin/xlint/lint1/msg_158.c       Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_158.c       Tue Mar 16 23:39:41 2021 +0000
@@ -1,7 +1,43 @@
-/*     $NetBSD: msg_158.c,v 1.2 2021/02/21 09:07:58 rillig Exp $       */
+/*     $NetBSD: msg_158.c,v 1.3 2021/03/16 23:39:41 rillig Exp $       */
 # 3 "msg_158.c"
 
 // Test for message: %s may be used before set [158]
 
-TODO: "Add example code that triggers the above message." /* expect: 249 */
-TODO: "Add example code that almost triggers the above message."
+void sink_int(int);
+
+void
+example(int arg)
+{
+       int twice_arg;
+
+       sink_int(twice_arg);    /* expect: 158 */
+       twice_arg = 2 * arg;
+       sink_int(twice_arg);
+}
+
+void
+conditionally_used(int arg)
+{
+       int twice_arg;
+
+       if (arg > 0)
+               twice_arg = 2 * arg;
+       if (arg > 0)
+               sink_int(twice_arg);
+}
+
+void
+conditionally_unused(int arg)
+{
+       int twice_arg;
+
+       if (arg > 0)
+               twice_arg = 2 * arg;
+
+       /*
+        * This situation is not detected by lint as it does not track the
+        * possible code paths for all conditions.
+        */
+       if (arg < 0)
+               sink_int(twice_arg);
+}
diff -r f539fb0a5681 -r 6c95b6b799c6 tests/usr.bin/xlint/lint1/msg_158.exp
--- a/tests/usr.bin/xlint/lint1/msg_158.exp     Tue Mar 16 23:18:49 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_158.exp     Tue Mar 16 23:39:41 2021 +0000
@@ -1,1 +1,1 @@
-msg_158.c(6): syntax error ':' [249]
+msg_158.c(13): warning: twice_arg may be used before set [158]