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Received: from 97-122-117-2.hlrn.qwest.net ([97.122.117.2]:52946 helo=bapiya) by box5379.bluehost.com with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.99.5) (envelope-from ) id 1wxUsr-00000003gKT-2Ned; Fri, 21 Aug 2026 13:26:33 -0600 From: Tom Tromey To: Jielun Wu Cc: gdb-patches@sourceware.org Subject: Re: [PATCH] gdb: Check DW_OP_deref_type size against type In-Reply-To: <20260814085303.2561156-1-firmiana402@gmail.com> (Jielun Wu's message of "Fri, 14 Aug 2026 16:53:03 +0800") References: <20260814085303.2561156-1-firmiana402@gmail.com> X-Attribution: Tom Date: Fri, 21 Aug 2026 13:26:32 -0600 Message-ID: <87pkzbnul3.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain 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: 97.122.117.2 X-Source-L: No X-Exim-ID: 1wxUsr-00000003gKT-2Ned X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-122-117-2.hlrn.qwest.net (bapiya) [97.122.117.2]:52946 X-Source-Auth: tom+tromey.com X-Email-Count: 12 X-Org: HG=bhshared;ORG=bluehost; X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfMs5/kL/bj31Pa3QCLPtqf1lygC+3/KsBLowR5I4pwYKcjLh+g6G3qWVfaVCVbHtF3qrWD+Q3bYdtItwJtcCKyLAmZ9eqe2Ulg7DKAKh+DFdMlqL/Xwj VgZAxTef7jgG+BNXjTDmkrlHYm0OZc2oeHkhkL2ipziKAi3P/MB/N12SBoYo6fa7lQNWU8gwauRD5ZNS6CBvUJK4rRJsWeoJIoI= X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org >>>>> Jielun Wu writes: > DWARF v5 requires the explicit size operand of DW_OP_deref_type to > match the size of the referenced base type. The evaluator currently > passes both sizes to dwarf_expr_context::deref without validating the > encoding, and the generic dereference helper accepts the mismatch by > zero-extending the bytes read from memory. > Reject a mismatch after resolving the base type. Add a DWARF assembler > test covering both DW_OP_deref_type and DW_OP_GNU_deref_type. > Tested on x86_64-linux. I think we're going to need copyright assignments in order to merge this and the other patches. You can email 'assign@gnu.org' to get started. Tom