From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gateway33.websitewelcome.com (gateway33.websitewelcome.com [192.185.146.130]) by sourceware.org (Postfix) with ESMTPS id 1EB1A3893676 for ; Fri, 1 Jan 2021 21:48:20 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 1EB1A3893676 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=tromey.com Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=tom@tromey.com Received: from cm17.websitewelcome.com (cm17.websitewelcome.com [100.42.49.20]) by gateway33.websitewelcome.com (Postfix) with ESMTP id BE7251006A1B for ; Fri, 1 Jan 2021 15:48:19 -0600 (CST) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with SMTP id vSHTkzb8KDT64vSHTk79C3; Fri, 01 Jan 2021 15:48:19 -0600 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=NSNSB8lkRnEdpQ+kPwY4md+gF2wdEO/pl6YtWpcTHXk=; b=l7CtJlHRO1RnSjn7es9UKi0wuP zPpSyDmdLQDA9HuTVdwpd9936vxN8OrdFrTlry5B2tmtC/HSPj4QuCizW2anCeKS7/v742d09iJ8w SC087+0z+kNEV0Sxnr04WVSfo; Received: from 97-122-81-39.hlrn.qwest.net ([97.122.81.39]:60408 helo=localhost.localdomain) by box5379.bluehost.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1kvSHT-0029b0-Gf for gdb-patches@sourceware.org; Fri, 01 Jan 2021 14:48:19 -0700 From: Tom Tromey To: gdb-patches@sourceware.org Subject: [PATCH 112/203] Introduce unop_sizeof_operation Date: Fri, 1 Jan 2021 14:45:52 -0700 Message-Id: <20210101214723.1784144-113-tom@tromey.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210101214723.1784144-1-tom@tromey.com> References: <20210101214723.1784144-1-tom@tromey.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 97.122.81.39 X-Source-L: No X-Exim-ID: 1kvSHT-0029b0-Gf X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-122-81-39.hlrn.qwest.net (localhost.localdomain) [97.122.81.39]:60408 X-Source-Auth: tom+tromey.com X-Email-Count: 113 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-Spam-Status: No, score=-3032.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, GIT_PATCH_0, JMQ_SPF_NEUTRAL, RCVD_IN_ABUSEAT, RCVD_IN_BARRACUDACENTRAL, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_PASS, SPF_NEUTRAL, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Jan 2021 21:48:21 -0000 This adds class unop_sizeof_operation, which implements UNOP_SIZEOF. gdb/ChangeLog 2021-01-01 Tom Tromey * expop.h (class unop_sizeof_operation): New. * ax-gdb.c (unop_sizeof_operation::do_generate_ax): New method. --- gdb/ChangeLog | 5 +++++ gdb/ax-gdb.c | 23 +++++++++++++++++++++++ gdb/expop.h | 29 +++++++++++++++++++++++++++++ 3 files changed, 57 insertions(+) diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c index 64710887534..756f4d7969a 100644 --- a/gdb/ax-gdb.c +++ b/gdb/ax-gdb.c @@ -2491,6 +2491,29 @@ comma_operation::do_generate_ax (struct expression *exp, /* It's the consumer's responsibility to trace the right operand. */ } +void +unop_sizeof_operation::do_generate_ax (struct expression *exp, + struct agent_expr *ax, + struct axs_value *value, + struct type *cast_type) +{ + /* We don't care about the value of the operand expression; we only + care about its type. However, in the current arrangement, the + only way to find an expression's type is to generate code for it. + So we generate code for the operand, and then throw it away, + replacing it with code that simply pushes its size. */ + int start = ax->len; + + std::get<0> (m_storage)->generate_ax (exp, ax, value); + + /* Throw away the code we just generated. */ + ax->len = start; + + ax_const_l (ax, TYPE_LENGTH (value->type)); + value->kind = axs_rvalue; + value->type = builtin_type (ax->gdbarch)->builtin_int; +} + } /* This handles the middle-to-right-side of code generation for binary diff --git a/gdb/expop.h b/gdb/expop.h index 8ddc26d329a..22af0c824e2 100644 --- a/gdb/expop.h +++ b/gdb/expop.h @@ -1571,6 +1571,35 @@ class unop_addr_operation } }; +/* Implement 'sizeof'. */ +class unop_sizeof_operation + : public maybe_constant_operation +{ +public: + + using maybe_constant_operation::maybe_constant_operation; + + value *evaluate (struct type *expect_type, + struct expression *exp, + enum noside noside) override + { + if (noside == EVAL_SKIP) + return eval_skip_value (exp); + return std::get<0> (m_storage)->evaluate_for_sizeof (exp, noside); + } + + enum exp_opcode opcode () const override + { return UNOP_SIZEOF; } + +protected: + + void do_generate_ax (struct expression *exp, + struct agent_expr *ax, + struct axs_value *value, + struct type *cast_type) + override; +}; + } /* namespace expr */ #endif /* EXPOP_H */ -- 2.26.2