[src/trunk]: src/usr.bin/xlint/lint1 lint: continue analysis of wrong type in...

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

details:   https://anonhg.NetBSD.org/src/rev/a2461e049ea7
branches:  trunk
changeset: 985906:a2461e049ea7
user:      rillig <rillig%NetBSD.org@localhost>
date:      Mon Sep 13 06:11:51 2021 +0000

description:
lint: continue analysis of wrong type in abstract declaration

No functional change.

diffstat:

 tests/usr.bin/xlint/lint1/msg_347.c   |  27 ++++++++++++++++++++++++---
 tests/usr.bin/xlint/lint1/msg_347.exp |   4 ++++
 usr.bin/xlint/lint1/cgram.y           |   6 ++++--
 usr.bin/xlint/lint1/decl.c            |  14 ++++++++++++--
 4 files changed, 44 insertions(+), 7 deletions(-)

diffs (125 lines):

diff -r a825ddc80656 -r a2461e049ea7 tests/usr.bin/xlint/lint1/msg_347.c
--- a/tests/usr.bin/xlint/lint1/msg_347.c       Mon Sep 13 05:25:27 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_347.c       Mon Sep 13 06:11:51 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: msg_347.c,v 1.2 2021/09/12 17:30:53 rillig Exp $       */
+/*     $NetBSD: msg_347.c,v 1.3 2021/09/13 06:11:51 rillig Exp $       */
 # 3 "msg_347.c"
 
 // Test for message: redeclaration of '%s' with type '%s', expected '%s' [347]
@@ -33,11 +33,32 @@
 struct last_arg;
 /*
  * FIXME: The following error is completely wrong.
- * There is no argument that has 'struct last_arg', there are only pointers
- * to it.
+ *  There is no argument that has 'struct last_arg', there are only pointers
+ *  to it.
  */
 /* expect+2: error: '<unnamed>' has incomplete type 'incomplete struct last_arg' [31] */
 /* expect+1: previous declaration of last_arg_struct [260] */
 void last_arg_struct(double, double *(struct last_arg *));
 /* expect+1: error: redeclaration of 'last_arg_struct' with type 'function(double, pointer to function(pointer to incomplete struct last_arg) returning pointer to double) returning void', expected 
'function(double, incomplete struct last_arg) returning void' [347] */
 void last_arg_struct(double d, double *fn(struct last_arg *));
+
+
+struct last_param {
+       int member;
+};
+
+/* expect+1: previous declaration of last_param [260] */
+void last_param(double, double *(struct last_param));
+
+/*
+ * FIXME: The type of last_param is completely wrong.  The second parameter
+ *  must be a function, not a struct.
+ */
+/* expect+1: error: cannot initialize 'double' from 'pointer to function(double, struct last_param) returning void' [185] */
+double reveal_type_of_last_param_abstract = last_param;
+
+/* expect+1: error: redeclaration of 'last_param' with type 'function(double, pointer to function(struct last_param) returning pointer to double) returning void', expected 'function(double, struct 
last_param) returning void' [347] */
+void last_param(double d, double *fn(struct last_param));
+
+/* expect+1: error: cannot initialize 'double' from 'pointer to function(double, pointer to function(struct last_param) returning pointer to double) returning void' [185] */
+double reveal_type_of_last_param_named = last_param;
diff -r a825ddc80656 -r a2461e049ea7 tests/usr.bin/xlint/lint1/msg_347.exp
--- a/tests/usr.bin/xlint/lint1/msg_347.exp     Mon Sep 13 05:25:27 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/msg_347.exp     Mon Sep 13 06:11:51 2021 +0000
@@ -3,4 +3,8 @@
 msg_347.c(41): error: '<unnamed>' has incomplete type 'incomplete struct last_arg' [31]
 msg_347.c(43): error: redeclaration of 'last_arg_struct' with type 'function(double, pointer to function(pointer to incomplete struct last_arg) returning pointer to double) returning void', expected 
'function(double, incomplete struct last_arg) returning void' [347]
 msg_347.c(41): previous declaration of last_arg_struct [260]
+msg_347.c(58): error: cannot initialize 'double' from 'pointer to function(double, struct last_param) returning void' [185]
+msg_347.c(61): error: redeclaration of 'last_param' with type 'function(double, pointer to function(struct last_param) returning pointer to double) returning void', expected 'function(double, struct 
last_param) returning void' [347]
+msg_347.c(51): previous declaration of last_param [260]
+msg_347.c(64): error: cannot initialize 'double' from 'pointer to function(double, pointer to function(struct last_param) returning pointer to double) returning void' [185]
 msg_347.c(33): warning: struct last_arg never defined [233]
diff -r a825ddc80656 -r a2461e049ea7 usr.bin/xlint/lint1/cgram.y
--- a/usr.bin/xlint/lint1/cgram.y       Mon Sep 13 05:25:27 2021 +0000
+++ b/usr.bin/xlint/lint1/cgram.y       Mon Sep 13 06:11:51 2021 +0000
@@ -1,5 +1,5 @@
 %{
-/* $NetBSD: cgram.y,v 1.361 2021/09/10 20:02:50 rillig Exp $ */
+/* $NetBSD: cgram.y,v 1.362 2021/09/13 06:11:51 rillig Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -35,7 +35,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: cgram.y,v 1.361 2021/09/10 20:02:50 rillig Exp $");
+__RCSID("$NetBSD: cgram.y,v 1.362 2021/09/13 06:11:51 rillig Exp $");
 #endif
 
 #include <limits.h>
@@ -1403,12 +1403,14 @@
 
 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */
 direct_abstract_declarator:
+       /* TODO: sort rules according to C99 */
          T_LPAREN abstract_declarator T_RPAREN {
                $$ = $2;
          }
        | T_LBRACK T_RBRACK {
                $$ = add_array(abstract_name(), false, 0);
          }
+       /* TODO: T_LBRACK T_ASTERISK T_RBRACK; see below */
        | T_LBRACK array_size T_RBRACK {
                $$ = add_array(abstract_name(), true,
                    to_int_constant($2, false));
diff -r a825ddc80656 -r a2461e049ea7 usr.bin/xlint/lint1/decl.c
--- a/usr.bin/xlint/lint1/decl.c        Mon Sep 13 05:25:27 2021 +0000
+++ b/usr.bin/xlint/lint1/decl.c        Mon Sep 13 06:11:51 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: decl.c,v 1.239 2021/09/13 05:25:27 rillig Exp $ */
+/* $NetBSD: decl.c,v 1.240 2021/09/13 06:11:51 rillig Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -38,7 +38,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: decl.c,v 1.239 2021/09/13 05:25:27 rillig Exp $");
+__RCSID("$NetBSD: decl.c,v 1.240 2021/09/13 06:11:51 rillig Exp $");
 #endif
 
 #include <sys/param.h>
@@ -2867,6 +2867,16 @@
        if (dcs->d_ctx == PROTO_ARG)
                sym->s_arg = true;
 
+       /*
+        * At this point, dcs->d_type contains only the basic type.  That
+        * type will be updated later, adding pointers, arrays and functions
+        * as necessary.
+        */
+       /*
+        * XXX: This is not the correct type.  For example in msg_347, it is
+        * the type of the last prototype parameter, but it should rather be
+        * the return type of the function.
+        */
        sym->s_type = dcs->d_type;
        dcs->d_redeclared_symbol = NULL;
        dcs->d_vararg = false;