From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f180.google.com (mail-yw1-f180.google.com [209.85.128.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C74493BE17D for ; Sun, 6 Sep 2026 17:18:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788715096; cv=none; b=Fk51O6KK7p0FmdF7BS+TAq0q5qM6Fxy7TdvaYFaWVdjHVE0wynwR5bGKwJRTe/+B1uq9XAAB6CHLN7riuWGxp8bVsu7/FbZDz27BEvbM0f48FtuQMwGxFA7ldxIVUZ0msWmPKLFBMZ1FNnySMjql9gKC0kS56c6w0MBfb2/I3lE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788715096; c=relaxed/simple; bh=WYWkloWX0WwYIbfuRU0AbifbyJ2iXxd78Hzjdu5xb60=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eZ/fqeCEu/753Sg57BQHY4d/KdYuc/83Pgwyeb/2WDgkTdwvH0vlNdcdHMnX7zD+4RThrysmY2yGp977lTThdolmLshM+gJoKz4y2hRgYiNMF4YOq59MfC1DhobNixeMcb3p7Nd+IRiU+VHS1L7ioURvaH8k9dVZmCIPQKCUdzo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=KJ3RKGop; arc=none smtp.client-ip=209.85.128.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KJ3RKGop" Received: by mail-yw1-f180.google.com with SMTP id 00721157ae682-86b03b75fecso42500767b3.0 for ; Sun, 06 Sep 2026 10:18:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788715093; x=1789319893; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=t5Xptp4H+rxzUUCx4qt8Wtg7L4/4Oif3JrXMZT5ooQM=; b=KJ3RKGopVD+MUwJKsDfjsTr13qI4M9luSyJs4hA133gHsuBvrnUs0/+hrDcVadH03l nuFjLQF257l2gCXDcaeW/1MhQBbYFg+PyyxMmNjGUzf+pEnSMe+aYJVXAFO6d5Wx1kDn 4129G0IxXCiqeIxTZIi3H6qxYwK3xpt92O64MvOHcrtSEwvanLI1KRyFdbWY11PT6kM/ k178iCvIKm3Z7KsP399yzw4UXUQmtv3B1S6J5kUrIgYUTlyr0EDbaocABXkp8gzqiyFM 24bv/Jw0lYGkXWjK1JVl4XdMCNBkrHz4tavFE05/sXTsIQZDjO3ObCWvkNwwqD9Sx7y5 SLRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788715093; x=1789319893; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=t5Xptp4H+rxzUUCx4qt8Wtg7L4/4Oif3JrXMZT5ooQM=; b=j/DNYy7slyiiW9P76shyWRGL6YipLmGngtfFYOXlHtK81/sxhCWZJeGwojxvH9VKOo sRxBEZidkOA4le3jvJMrILGMaDiJ6KWot4scwaVrOVHd6/xvRlMJ9jhBUxfMCBYToTjD nr5M6nc5V7kpQfWRCSBbBUQ+cfmLkUvlu1P8c9sPGuppL3nGgXYTebjUXBKVaV/E/34t HaKKjTguwMCnIhPqnl3OkpX++HjohUVyiOCnZSFnCcqNj8IJN06V0y23qU61uWnLeFS3 ptmcijQU6G9FVm/S6LvwHy38Ut0Vbe4NLXSNpucPqIJknlzW9ADhcWYyvhhdllFEzl6M FUEQ== X-Forwarded-Encrypted: i=1; AKwUvByOHRxv+DM5h/Lwr1//DWgn1AMDWY8u3ckuLjtw11LZnk7JrlEvc4WkIuKKxMznl/u9XfvOH5nK4CCc/QOGXSOQ@vger.kernel.org X-Gm-Message-State: AFuF++mCpfdoZk+jzvvi6DOcFzHsAyptL61VKGf76VIoXKtu2k66Ts0A lAj3HRcYzLKEtuUH7CFCkCg0ajvzANBDml3ILoZIElgW5F5LvLyZFvTd X-Gm-Gg: AYBFou0d5gGnP5ZXfLgihpoMKHId1blI2Z6J3Bm5R9YiLStITf2AYNY7qi2LpNDyLSZ TfaE23ad0YgphBFmK3pSbtMeagjBopwrDn9LPcIMeu52OuUDQVU+Xi7fo3Yfrr9n7P4FOyDekzp Mkw9in0Yf+atU6GjU+cLKUkNXUDLATa+cTmMHup4stURQtWgknbn/9PpeoYBV3VyQlSeIH7HxSn i+T2sWGV6hamp7HNNOFEi9U35yKNON6at3N1LZB6UvAvEj5CV5YPJ/B86lSxD00PmHgqpDHHdbY Q/bv03cmt4JOMpSUu8gnyW312K5J+MnV7ZxkfU5Lvuu1Ar1p9hFFAlAObRO7f3sO5tQGBjt5a+V Ep3xNdU+yU0faDIQ0Wk+S4d9e73kp1f1eAybmXYd/SLFKRNtankLOC6agwX+JAGHS4LTDgM2i60 GOta+0NrydmlDaL6ngNxza3qoE7JR8Nsm4yJoVXkmxhmSQiByCSBxSTznhmOkGdA== X-Received: by 2002:a05:690c:1a:b0:873:5bd1:98b1 with SMTP id 00721157ae682-8735bd19fa2mr41605437b3.35.1788715093078; Sun, 06 Sep 2026 10:18:13 -0700 (PDT) Received: from localhost ([2600:1702:7a90:6f9f:8bc4:8aec:108d:7a04]) by smtp.gmail.com with ESMTPSA id 00721157ae682-8714b62bc77sm58248267b3.39.2026.09.06.10.18.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Sep 2026 10:18:12 -0700 (PDT) From: Matt Turner Date: Sun, 06 Sep 2026 13:18:06 -0400 Subject: [PATCH v4 3/3] perf tools: fix GTK4 leftover show/hide calls and error-loop list race Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260906-perf-gtk2-v4-3-97e92ee07214@gmail.com> References: <20260906-perf-gtk2-v4-0-97e92ee07214@gmail.com> In-Reply-To: <20260906-perf-gtk2-v4-0-97e92ee07214@gmail.com> To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, bpf@vger.kernel.org, Matt Turner X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=4571; i=mattst88@gmail.com; h=from:subject:message-id; bh=WYWkloWX0WwYIbfuRU0AbifbyJ2iXxd78Hzjdu5xb60=; b=owGbwMvMwCW25rVmCc8sv+mMp9WSGLLmLvBp23LZQib47aP9Z933OftXl5u5Vk3rqTmRt1s4O uXu2vDTHR9ZGMS4GGaKKbLErVdkmdW2Y6nPaelfMHNYmUCGSIs0MAABCwNfbmJeqZGOkZ6ptqGe IZChYxQPkdNj0MgsLi5NLdJNKyhyyMsvSSzJzM8r1ssvSM0rSC/QS8tMK8nIyC8qTgUaoZeXWmL q6uhmZGhgYuloYeZk4Whq4uzsZOjk5ujo7OpkZGluYuBs6WjiamnOwMUpAHNNaQzDT8Yrs272TQ nT9+yyKnRWrdvCznxQI/uZlsq9oFKuTxwaLQx/xfYtbLF/eCdudyTzGbb6vdqBhdMSvaRbFe+W/ 97CveAvFwA= X-Developer-Key: i=mattst88@gmail.com; a=openpgp; fpr=3BB639E56F861FA2E86505690FDD682D974CA72A Sashiko AI review of the GTK2-to-GTK4 port flagged two real issues: - gtk_widget_show()/gtk_widget_hide() were removed in GTK4 but three call sites were missed during the port. Replace with gtk_widget_set_visible(), adding a small wrapper for the info-bar "response" signal callback since gtk_widget_hide() no longer exists to pass directly. - perf_gtk__error_loops is updated with g_slist_prepend()/ g_slist_remove() in perf_gtk__error(), but perf_gtk__quit_error_dialog() walks the same list from a signal handler (perf_gtk__signal() -> perf_gtk__exit()) that can fire mid-update, corrupting the list. Block the relevant signals around the two list updates. --- tools/perf/ui/gtk/browser.c | 10 ++++++++-- tools/perf/ui/gtk/util.c | 27 ++++++++++++++++++++++++++- 2 files changed, 34 insertions(+), 3 deletions(-) diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c index e1d286945832..40a413787192 100644 --- a/tools/perf/ui/gtk/browser.c +++ b/tools/perf/ui/gtk/browser.c @@ -74,6 +74,12 @@ const char *perf_gtk__get_percent_color(double percent) return NULL; } +static void perf_gtk__hide_widget(GtkWidget *widget, gint response_id __maybe_unused, + gpointer data __maybe_unused) +{ + gtk_widget_set_visible(widget, FALSE); +} + GtkWidget *perf_gtk__setup_info_bar(void) { GtkWidget *info_bar; @@ -83,14 +89,14 @@ GtkWidget *perf_gtk__setup_info_bar(void) gtk_widget_set_visible(info_bar, FALSE); label = gtk_label_new(""); - gtk_widget_show(label); + gtk_widget_set_visible(label, TRUE); gtk_info_bar_add_child(GTK_INFO_BAR(info_bar), label); gtk_info_bar_add_button(GTK_INFO_BAR(info_bar), "_OK", GTK_RESPONSE_OK); g_signal_connect(info_bar, "response", - G_CALLBACK(gtk_widget_hide), NULL); + G_CALLBACK(perf_gtk__hide_widget), NULL); pgctx->info_bar = info_bar; pgctx->message_label = label; diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c index 8a922851257e..f1dbd96e2370 100644 --- a/tools/perf/ui/gtk/util.c +++ b/tools/perf/ui/gtk/util.c @@ -2,6 +2,7 @@ #include "../util.h" #include "gtk.h" +#include #include #include #include @@ -48,6 +49,25 @@ void perf_gtk__quit_error_dialog(void) g_slist_foreach(perf_gtk__error_loops, perf_gtk__quit_loop, NULL); } +/* + * perf_gtk__signal() runs perf_gtk__quit_error_dialog() from a signal + * handler, which can preempt perf_gtk__error() while it is updating + * perf_gtk__error_loops below. Block those signals around the update so + * the list is never traversed half-modified. + */ +static void perf_gtk__block_exit_signals(sigset_t *old_set) +{ + sigset_t set; + + sigemptyset(&set); + sigaddset(&set, SIGSEGV); + sigaddset(&set, SIGFPE); + sigaddset(&set, SIGINT); + sigaddset(&set, SIGQUIT); + sigaddset(&set, SIGTERM); + sigprocmask(SIG_BLOCK, &set, old_set); +} + static void perf_gtk__dialog_response(GtkDialog *dialog, gint response_id __maybe_unused, gpointer data __maybe_unused) @@ -61,6 +81,7 @@ static int perf_gtk__error(const char *format, va_list args) GtkWidget *dialog; GMainLoop *loop; va_list args_copy; + sigset_t old_set; va_copy(args_copy, args); if (!perf_gtk__is_active_context(pgctx) || @@ -86,7 +107,9 @@ static int perf_gtk__error(const char *format, va_list args) * outlive the dialog and hang. */ loop = g_main_loop_new(NULL, FALSE); + perf_gtk__block_exit_signals(&old_set); perf_gtk__error_loops = g_slist_prepend(perf_gtk__error_loops, loop); + sigprocmask(SIG_SETMASK, &old_set, NULL); g_signal_connect(dialog, "response", G_CALLBACK(perf_gtk__dialog_response), NULL); g_signal_connect_swapped(dialog, "destroy", @@ -94,7 +117,9 @@ static int perf_gtk__error(const char *format, va_list args) gtk_widget_set_visible(dialog, TRUE); g_main_loop_run(loop); + perf_gtk__block_exit_signals(&old_set); perf_gtk__error_loops = g_slist_remove(perf_gtk__error_loops, loop); + sigprocmask(SIG_SETMASK, &old_set, NULL); g_main_loop_unref(loop); free(msg); @@ -120,7 +145,7 @@ static int perf_gtk__warning_info_bar(const char *format, va_list args) gtk_label_set_text(GTK_LABEL(pgctx->message_label), msg); gtk_info_bar_set_message_type(GTK_INFO_BAR(pgctx->info_bar), GTK_MESSAGE_WARNING); - gtk_widget_show(pgctx->info_bar); + gtk_widget_set_visible(pgctx->info_bar, TRUE); free(msg); return 0; -- 2.54.0