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Fri, 15 May 2026 17:44:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id PH5CNZlbB2p1aAAAD6G6ig (envelope-from ); Fri, 15 May 2026 17:44:57 +0000 Message-ID: <33140204-448e-4e6c-97e5-833b589f1732@suse.de> Date: Fri, 15 May 2026 19:44:57 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/5] [gdb/python] Introduce py_{none, true, false, notimplemented} functions To: Tom Tromey Cc: gdb-patches@sourceware.org References: <20260515135834.2502165-1-tdevries@suse.de> <87h5o8h8xo.fsf@tromey.com> Content-Language: en-US From: Tom de Vries In-Reply-To: <87h5o8h8xo.fsf@tromey.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:dkim,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 0C7945D20B 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 On 5/15/26 7:36 PM, Tom Tromey wrote: > Tom> + So for the limited C API 3.12 and newer, we could just return a > Tom> + "PyObject *" instead. > > I don't think this sentence is correct. I mean, it might work in some > places, but using this universally would severely uglify gdb because > then spots operating generically would have to check specifically for > such objects. IMO object immortality is really best thought of as an > implementation detail of CPython and not an exposed feature. Hi Tom, I think the sentence is correct, and I still don't understand why you think its incorrect. What I'm trying to do here, is paraphrase the CPython implementation for say Py_RETURN_None: ... /* Macro for returning Py_None from a function. * Only treat Py_None as immortal in the limited C API 3.12 and newer. */ #if defined(Py_LIMITED_API) && Py_LIMITED_API+0 < 0x030c0000 # define Py_RETURN_NONE return Py_NewRef(Py_None) #else # define Py_RETURN_NONE return Py_None #endif ... AFAICT, I'm saying the exact same thing. Is that not the case, or are you saying there's a bug in CPython? Thanks, - Tom