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DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Queue-Id: 5940B6A85E 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 4/6/26 8:01 PM, Pedro Alves wrote: > On 2025-05-19 14:22, Pedro Alves wrote: >> While working on Windows non-stop support, I ran into a >> very-hard-to-track-down bug. >> > > ... > >> The patch adds getters/setters for both (user) state and >> internal_state, and adds assertions around state transitions, ensuring >> that internal_state doesn't get out of sync with >> thread::have_pending_wait_status(). > > I've rebased this on current master and I've now merged it, after retesting on native and gdbserver linux. > The rebase only required mechanical changes around thread_info pointer to thread_info references. > >> It also adds an assertion to >> clear_proceed_status_thread, making sure that we don't try to proceed >> a thread that is already running. Turns out that catches >> attach_command calling init_wait_for_inferior too late, after >> attaching has already created already-running threads. > > I've ended up splitting this part into a separate preparatory patch, to help with > archaeology and bisecting if this ever creates a problem. > > I've attached the two patches as they were merged. This commit: ... commit 2954dd2b734526165b920eb575bcd0fc07e0aa24 Date: Wed Feb 19 14:37:39 2025 +0000 thread_info::executing+resumed -> thread_info::internal_state ... caused a regression in test-case gdb.threads/hand-call-new-thread.exp: ... (gdb) p new_thread ()^M /home/vries/gdb/src/gdb/infrun.c:3742: internal-error: proceed: Assertion `!thread_is_in_step_over_chain (&tp)' failed.^M A problem internal to GDB has been detected,^M further debugging may prove unreliable.^M ----- Backtrace -----^M FAIL: gdb.threads/hand-call-new-thread.exp: iter 2: gdb-command

(GDB internal error) ... Filed here ( https://sourceware.org/bugzilla/show_bug.cgi?id=34082 ). Thanks, - Tom > > Pedro Alves