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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id l19-20020a05600c089300b003c5571c27a1sm5919102wmp.32.2022.10.10.00.54.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Oct 2022 00:54:02 -0700 (PDT) Message-ID: <8844735c-672c-fa3a-49fc-ea0a4f803107@redhat.com> Date: Mon, 10 Oct 2022 09:54:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: [PATCH v4 5/5] gdb/frame: Add reinflation method for frame_info_ptr To: Tom Tromey , Bruno Larsen via Gdb-patches References: <20220830100837.926692-1-blarsen@redhat.com> <20220830100837.926692-6-blarsen@redhat.com> <87wn9bsa0y.fsf@tromey.com> In-Reply-To: <87wn9bsa0y.fsf@tromey.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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: , From: Bruno Larsen via Gdb-patches Reply-To: Bruno Larsen Errors-To: gdb-patches-bounces+public-inbox=simark.ca@sourceware.org Sender: "Gdb-patches" On 07/10/2022 21:34, Tom Tromey wrote: >>>>>> "Bruno" == Bruno Larsen via Gdb-patches writes: > ... > > Bruno> diff --git a/gdb/infcmd.c b/gdb/infcmd.c > Bruno> index d292a0e55bf..bc171d8818a 100644 > Bruno> --- a/gdb/infcmd.c > Bruno> +++ b/gdb/infcmd.c > Bruno> @@ -1814,6 +1814,7 @@ finish_command (const char *arg, int from_tty) > Bruno> frame = get_prev_frame (get_selected_frame (_("No selected frame."))); > Bruno> if (frame == 0) > Bruno> error (_("\"finish\" not meaningful in the outermost frame.")); > Bruno> + frame.prepare_reinflate (); > > Bruno> clear_proceed_status (0); > > Bruno> @@ -1872,6 +1873,7 @@ finish_command (const char *arg, int from_tty) > > Bruno> print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0); > Bruno> } > Bruno> + frame.reinflate (); > > I'm curious about this change. Did you add this to avoid a crash? > I.e., it's a latent bug of some kind? This is one of the triggers for bug python/28856 (https://sourceware.org/bugzilla/show_bug.cgi?id=28856), but a quick recap: If one of the arguments of the function has a pretty printer that calls a function from the inferior, frame becomes stale and finish breaks. That bug was the original reason I started this series, lol. Cheers, Bruno > > Bruno> if (execution_direction == EXEC_REVERSE) > Bruno> finish_backward (sm); > Bruno> diff --git a/gdb/mi/mi-cmd-stack.c b/gdb/mi/mi-cmd-stack.c > Bruno> index f23559f886c..2c5bd2db96d 100644 > Bruno> --- a/gdb/mi/mi-cmd-stack.c > Bruno> +++ b/gdb/mi/mi-cmd-stack.c > Bruno> @@ -39,6 +39,7 @@ > Bruno> #include "inferior.h" > Bruno> #include "observable.h" > > Bruno> + > Bruno> enum what_to_list { locals, arguments, all }; > > Spurious change. > > Tom >