lint: fix assertion failure on duplicate qualifiers from __typeof__
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@ -1,4 +1,4 @@
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/* $NetBSD: gcc_typeof.c,v 1.3 2021/07/25 15:58:24 rillig Exp $ */
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/* $NetBSD: gcc_typeof.c,v 1.4 2022/04/10 12:14:10 rillig Exp $ */
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# 3 "gcc_typeof.c"
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/*
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@ -31,3 +31,13 @@ cast(double(*fn)(double))
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/* identity cast */
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take_function_double_returning_double((double (*)(double))fn);
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}
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/*
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* Since cgram 1.58 from 2014-02-18, when support for __typeof__ was added,
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* and before cgram.y 1.394 from 2022-04-10, lint ran into an assertion
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* failure when encountering a redundant type qualifier 'const' or 'volatile'
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* in a declaration using __typeof__. Seen in sys/sys/lwp.h on x86_64, in
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* the call atomic_load_consume(&l->l_mutex).
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*/
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int *volatile lock;
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const volatile __typeof__(lock) *lock_pointer = &lock;
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@ -1,5 +1,5 @@
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%{
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/* $NetBSD: cgram.y,v 1.393 2022/04/09 23:41:22 rillig Exp $ */
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/* $NetBSD: cgram.y,v 1.394 2022/04/10 12:14:10 rillig Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
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@ -35,7 +35,7 @@
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#include <sys/cdefs.h>
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#if defined(__RCSID) && !defined(lint)
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__RCSID("$NetBSD: cgram.y,v 1.393 2022/04/09 23:41:22 rillig Exp $");
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__RCSID("$NetBSD: cgram.y,v 1.394 2022/04/10 12:14:10 rillig Exp $");
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#endif
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#include <limits.h>
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@ -878,7 +878,8 @@ notype_type_specifier: /* see C99 6.7.2 */
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$$ = gettyp($1);
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}
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| T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */
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$$ = $3->tn_type;
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$$ = block_dup_type($3->tn_type);
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$$->t_typeof = true;
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}
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| struct_or_union_specifier {
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end_declaration_level();
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@ -1,4 +1,4 @@
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/* $NetBSD: decl.c,v 1.276 2022/04/09 23:41:22 rillig Exp $ */
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/* $NetBSD: decl.c,v 1.277 2022/04/10 12:14:10 rillig Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
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@ -38,7 +38,7 @@
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#include <sys/cdefs.h>
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#if defined(__RCSID) && !defined(lint)
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__RCSID("$NetBSD: decl.c,v 1.276 2022/04/09 23:41:22 rillig Exp $");
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__RCSID("$NetBSD: decl.c,v 1.277 2022/04/10 12:14:10 rillig Exp $");
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#endif
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#include <sys/param.h>
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@ -815,12 +815,13 @@ end_type(void)
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dcs_adjust_storage_class();
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if (dcs->d_const && dcs->d_type->t_const) {
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if (dcs->d_const && dcs->d_type->t_const && !dcs->d_type->t_typeof) {
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lint_assert(dcs->d_type->t_typedef);
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/* typedef already qualified with '%s' */
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warning(68, "const");
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}
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if (dcs->d_volatile && dcs->d_type->t_volatile) {
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if (dcs->d_volatile && dcs->d_type->t_volatile &&
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!dcs->d_type->t_typeof) {
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lint_assert(dcs->d_type->t_typedef);
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/* typedef already qualified with '%s' */
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warning(68, "volatile");
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@ -1,4 +1,4 @@
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/* $NetBSD: lint1.h,v 1.150 2022/04/09 23:41:22 rillig Exp $ */
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/* $NetBSD: lint1.h,v 1.151 2022/04/10 12:14:10 rillig Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
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@ -143,6 +143,7 @@ struct lint1_type {
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bool t_proto:1; /* function prototype (t_args valid) */
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bool t_vararg:1; /* prototype with '...' */
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bool t_typedef:1; /* type defined with typedef */
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bool t_typeof:1; /* type defined with GCC's __typeof__ */
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bool t_bitfield:1;
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/*
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* Either the type is currently an enum (having t_tspec ENUM), or
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