{"id":2230495,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2230495/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429190550.20122-3-farosas@suse.de/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260429190550.20122-3-farosas@suse.de>","date":"2026-04-29T19:05:47","name":"[v1,2/5] tests/qtest/dbus-vmstate: Mute Glib complaints about g_unsetenv thread-safety","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"4499de23b0f61756d63084e96feee70184a4e870","submitter":{"id":85343,"url":"http://patchwork.ozlabs.org/api/1.1/people/85343/?format=json","name":"Fabiano Rosas","email":"farosas@suse.de"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429190550.20122-3-farosas@suse.de/mbox/","series":[{"id":502137,"url":"http://patchwork.ozlabs.org/api/1.1/series/502137/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502137","date":"2026-04-29T19:05:45","name":"tests/qtest: Re-enable dbus-vmstate","version":1,"mbox":"http://patchwork.ozlabs.org/series/502137/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2230495/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2230495/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=fWoIChkE;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=lIOiwFlE;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=fWoIChkE;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=lIOiwFlE;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1777489557;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=5Q11033ixT9HAxDsw1JBkEAYwLqftpwNv4tC1cNzWxc=;\n b=lIOiwFlEO/SIqa/N/BLmB4/Dxsb+Mk8mzZbhahih0SC6pgzlyq7FBqGxDh+qex8A1egxxj\n rJNK2Zqs6J6PToCg=="],"From":"Fabiano Rosas ","To":"qemu-devel@nongnu.org","Cc":"Peter Xu , marcandre.lureau@redhat.com,\n Laurent Vivier , Paolo Bonzini ","Subject":"[PATCH v1 2/5] tests/qtest/dbus-vmstate: Mute Glib complaints about\n g_unsetenv thread-safety","Date":"Wed, 29 Apr 2026 16:05:47 -0300","Message-ID":"<20260429190550.20122-3-farosas@suse.de>","X-Mailer":"git-send-email 2.51.0","In-Reply-To":"<20260429190550.20122-1-farosas@suse.de>","References":"<20260429190550.20122-1-farosas@suse.de>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Spamd-Result":"default: False [-3.01 / 50.00]; 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envelope-from=farosas@suse.de;\n helo=smtp-out1.suse.de","X-Spam_score_int":"-43","X-Spam_score":"-4.4","X-Spam_bar":"----","X-Spam_report":"(-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"TLDR: GLib is bugged, the dbus-vmstate-test spams debug messages\nunconditionally. Mute them.\n\nGLib is trying to protect against the lack of thread-safety of\nsetenv/unsetsenv functions by warning when those functions were\ninvoked after a thread has been started.\nhttps://gitlab.gnome.org/GNOME/glib/issues/715\n\nUnfortunately:\n1) GLib itself starts a thread pool via _g_dbus_initialize when\nworking around a bug in its type dependency chain. This happens in\nmany places, but the test triggers it via\ng_dbus_address_get_for_bus_sync.\nhttps://bugzilla.gnome.org/show_bug.cgi?id=627724\n\n2) GLib itself calls g_unsetenv after the test calls g_test_dbus_up.\n\n3) The debug message at g_unsetenv is issued to the G_LOG_DOMAIN\ndefined while compiling the library, i.e \"GLib\", but this domain is\nnever initialized, so the log functions go into a fallback chain that\nresults in ignoring the G_MESSAGES_DEBUG environment variable, causing\nthe debug messages to not be suppressed when they should.\n\nMute the messages by implementing a handler for G_LOG_LEVEL_DEBUG\nin the \"GLib\" log domain and honoring G_MESSAGES_DEBUG.\n\nSigned-off-by: Fabiano Rosas \n---\n tests/qtest/dbus-vmstate-test.c | 21 +++++++++++++++++++++\n 1 file changed, 21 insertions(+)","diff":"diff --git a/tests/qtest/dbus-vmstate-test.c b/tests/qtest/dbus-vmstate-test.c\nindex 90c050b448..51c5fdb995 100644\n--- a/tests/qtest/dbus-vmstate-test.c\n+++ b/tests/qtest/dbus-vmstate-test.c\n@@ -357,12 +357,33 @@ test_dbus_vmstate_missing_dst(char *name, MigrateCommon *args)\n g_test_trap_assert_passed();\n }\n \n+static void log_func(const gchar *log_domain, GLogLevelFlags log_level,\n+ const gchar *message, gpointer user_data)\n+{\n+ const gchar *domains;\n+\n+ assert(log_level & G_LOG_LEVEL_DEBUG);\n+\n+ domains = getenv(\"G_MESSAGES_DEBUG\");\n+ if (!domains || (!strstr(domains, \"GLib\") && !strstr(domains, \"all\"))) {\n+ return;\n+ }\n+ g_log_default_handler(\"GLib\", G_LOG_LEVEL_DEBUG, message, NULL);\n+}\n+\n int\n main(int argc, char **argv)\n {\n GError *err = NULL;\n int ret;\n \n+ /*\n+ * GLib currently emits debug messages that ignore\n+ * G_MESSAGES_DEBUG. Set a custom log handler to work around the\n+ * issue.\n+ */\n+ g_log_set_handler(\"GLib\", G_LOG_LEVEL_DEBUG, log_func, NULL);\n+\n g_test_init(&argc, &argv, NULL);\n \n workdir = g_dir_make_tmp(\"dbus-vmstate-test-XXXXXX\", &err);\n","prefixes":["v1","2/5"]}