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Fri, 14 Nov 2025 13:13:39 -0700 From: Tom Tromey To: Simon Marchi via Gdb Cc: psmith@gnu.org, Simon Marchi Subject: Re: GDB 15/16 crashing in add_thread_silent() In-Reply-To: <24d8355f-0233-4fbd-ac6e-8cda3f61916e@simark.ca> (Simon Marchi via Gdb's message of "Fri, 14 Nov 2025 15:03:40 -0500") References: <78bf54fc9dfbb57d3434d8435e94b091e1fa6785.camel@gnu.org> <9a1b77f25cab8eb7433476918a9c5be29091856c.camel@gnu.org> <24d8355f-0233-4fbd-ac6e-8cda3f61916e@simark.ca> X-Attribution: Tom Date: Fri, 14 Nov 2025 13:13:35 -0700 Message-ID: <87seegtlsg.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: 97.122.120.205 X-Source-L: No X-Exim-ID: 1vK0At-00000003eym-2bBR X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-122-120-205.hlrn.qwest.net (bapiya) [97.122.120.205]:48584 X-Source-Auth: tom+tromey.com X-Email-Count: 4 X-Org: HG=bhshared;ORG=bluehost; X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfHnIRrSUq+ErLVpZbZlgK/sioUC3rqGcRywjLtl7SlQWnwnaGePQ+tHIAl7i3HcXDyeIGNgMRWbHYo+HCM1cHACp4/heAjT2AEIVLtMi/JnB/gKq40FU Oz43zUubQsJSoijgRoZ6YJg1azzKAEX0GSu8Pto7QoajHxHieiq9okWeJMfGlTQ3tp5WRtnh48Z/Mg== X-BeenThere: gdb@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-bounces~public-inbox=simark.ca@sourceware.org Sender: "Gdb" >>>>> "Simon" == Simon Marchi via Gdb writes: >> Earlier if the PID couldn't be found then pid is set to CORELOW_PID >> anyway, so this works and prevents the crash (although, I think GDB >> should check for the nullptr return and do _something_ non-crashy... >> maybe?) Simon> I agree that part seems clearly buggy, but I don't think you should Simon> focus on that. The problem has already happened earlier in the Simon> execution. See this thread as well https://inbox.sourceware.org/gdb-patches/20251024124208.1875651-1-tdevries@suse.de/ I wonder if the fix (assuming it arrives) should be in GDB 17. Tom