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119 lines
6.2 KiB
119 lines
6.2 KiB
4 years ago
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From b06e5e2b9761d242d9269b091da9a98ec705d2b1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
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Date: Tue, 1 Jun 2021 13:20:43 +0100
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Subject: [PATCH] gtk3: workaround missing gdk_threads_enter calls in external
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code
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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with gtk3 file dialog. file, open, +other locations,
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type davs://somewhere + return
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#0 0x00007ffff7a6e2a2 in raise () at /lib64/libc.so.6
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#1 0x00007ffff7a578a4 in abort () at /lib64/libc.so.6
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#2 0x00007ffff7a57789 in _nl_load_domain.cold () at /lib64/libc.so.6
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#3 0x00007ffff7a66a16 in () at /lib64/libc.so.6
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#4 0x00007fffd9be7672 in GtkYieldMutex::ThreadsLeave() (this=0x513480) at vcl/unx/gtk3/gtkinst.cxx:354
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#5 0x00007fffd9be6a53 in GdkThreadsLeave() () at vcl/unx/gtk3/gtkinst.cxx:116
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#6 0x00007fffd947ac2d in gtk_dialog_run (dialog=0xa984310) at /usr/src/debug/gtk3-3.24.29-1.fc34.x86_64/gtk/gtkdialog.c:1397
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^^^ this also (see #30) calls gdk_threads_leave before g_main_loop_run, but no gdk_threads_enter has been called, presumably emit_show_error_message should have called it (?) ^^^
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#7 0x00007fffd94a6dc6 in error_message_with_parent (detail=0xa97f9b0 "HTTP Error: Error resolving “nowhere”: Name or service not known", msg=<optimized out>, parent=<optimized out>)
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at /usr/src/debug/gtk3-3.24.29-1.fc34.x86_64/gtk/gtkfilechooserwidget.c:763
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#8 error_message (impl=<optimized out>, msg=<optimized out>, detail=0xa97f9b0 "HTTP Error: Error resolving “nowhere”: Name or service not known") at /usr/src/debug/gtk3-3.24.29-1.fc34.x86_64/gtk/gtkfilechooserwidget.c:786
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#9 0x00007fffe996ec2f in g_closure_invoke () at /lib64/libgobject-2.0.so.0
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#10 0x00007fffe998aea6 in signal_emit_unlocked_R () at /lib64/libgobject-2.0.so.0
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#11 0x00007fffe998c76a in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0
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#12 0x00007fffe998c983 in g_signal_emit () at /lib64/libgobject-2.0.so.0
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#13 0x00007fffd9561fc7 in emit_show_error_message (secondary_message=0x7fffbc0566f0 "HTTP Error: Error resolving “nowhere”: Name or service not known", primary_message=<optimized out>, view=0x900a240)
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at /usr/src/debug/gtk3-3.24.29-1.fc34.x86_64/gtk/gtkplacesview.c:171
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#14 server_mount_ready_cb (source_file=0x7fffbc05b4c0, res=<optimized out>, user_data=0x900a240) at /usr/src/debug/gtk3-3.24.29-1.fc34.x86_64/gtk/gtkplacesview.c:1232
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#15 0x00007fffe9a64a7a in g_task_return_now () at /lib64/libgio-2.0.so.0
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#16 0x00007fffe9a64c7b in g_task_return () at /lib64/libgio-2.0.so.0
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#17 0x00007fffd80653b8 in mount_reply () at /usr/lib64/gio/modules/libgvfsdbus.so
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#18 0x00007fffe9a64a7a in g_task_return_now () at /lib64/libgio-2.0.so.0
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#19 0x00007fffe9a64c7b in g_task_return () at /lib64/libgio-2.0.so.0
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#20 0x00007fffe9acd2dd in reply_cb () at /lib64/libgio-2.0.so.0
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#21 0x00007fffe9a64a7a in g_task_return_now () at /lib64/libgio-2.0.so.0
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#22 0x00007fffe9a64c7b in g_task_return () at /lib64/libgio-2.0.so.0
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#23 0x00007fffe9ac4c34 in g_dbus_connection_call_done () at /lib64/libgio-2.0.so.0
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#24 0x00007fffe9a64a7a in g_task_return_now () at /lib64/libgio-2.0.so.0
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#25 0x00007fffe9a64abd in complete_in_idle_cb () at /lib64/libgio-2.0.so.0
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#26 0x00007fffe987074b in g_idle_dispatch () at /lib64/libglib-2.0.so.0
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#27 0x00007fffe98744cf in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
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#28 0x00007fffe98c84e8 in g_main_context_iterate.constprop () at /lib64/libglib-2.0.so.0
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#29 0x00007fffe9873a93 in g_main_loop_run () at /lib64/libglib-2.0.so.0
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#30 0x00007fffd947ac37 in gtk_dialog_run (dialog=0x1604460) at /usr/src/debug/gtk3-3.24.29-1.fc34.x86_64/gtk/gtkdialog.c:1398
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^^^ this will call gdk_threads_leave before g_main_loop_run, (gdk_threads_enter has been called earlier, and gdk_threads_enter will be called after g_main_loop_run) ^^^
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#31 0x00007fffd9bdbd96 in RunDialog::run() (this=0x9134f00) at vcl/unx/gtk3/fpicker/SalGtkPicker.cxx:199
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#32 0x00007fffd9bbf23f in SalGtkFilePicker::execute() (this=0x9004690) at vcl/unx/gtk3/fpicker/SalGtkFilePicker.cxx:953
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#33 0x00007ffff474741a in sfx2::FileDialogHelper_Impl::implDoExecute() (this=0x1667470) at sfx2/source/dialog/filedlghelper.cxx:1279
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#14 presumably server_mount_ready_cb of gtkplacesview.c should protect its gtk
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calls with gdk_threads_enter/gdk_threads_leave like enclosing_volume_mount_cb
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of gtkfilesystem.c does.
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Seeing as gdk_threads_leave/gdk_threads_enter is gone in gtk4 I doubt
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there's any point looking for a fix in gtk3 and we should just try and
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survive the problem.
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Change-Id: I007be4dee4f615d4431e27034dcf7f3d446c3e9a
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Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116559
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Tested-by: Jenkins
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Reviewed-by: Caolán McNamara <caolanm@redhat.com>
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(cherry picked from commit 08b7529f628eda1d209cf27f9bbe52ee336fef62)
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---
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vcl/unx/gtk3/gtk3gtkinst.cxx | 30 ++++++++++++++++++++++--------
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1 file changed, 22 insertions(+), 8 deletions(-)
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diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
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index 2d4dc36ce5fe..bba4e07f3003 100644
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--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
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+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
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@@ -314,20 +314,34 @@ thread_local std::stack<sal_uInt32> GtkYieldMutex::yieldCounts;
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void GtkYieldMutex::ThreadsEnter()
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{
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acquire();
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- if (!yieldCounts.empty()) {
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- auto n = yieldCounts.top();
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- yieldCounts.pop();
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- assert(n > 0);
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- n--;
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- if (n > 0)
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- acquire(n);
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+ if (yieldCounts.empty())
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+ return;
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+ auto n = yieldCounts.top();
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+ yieldCounts.pop();
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+
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+ const bool bUndoingLeaveWithoutEnter = n == 0;
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+ // if the ThreadsLeave bLeaveWithoutEnter of true condition occurred to
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+ // create this entry then return early undoing the initial acquire of the
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+ // function
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+ if G_UNLIKELY(bUndoingLeaveWithoutEnter)
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+ {
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+ release();
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+ return;
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}
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+
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+ assert(n > 0);
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+ n--;
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+ if (n > 0)
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+ acquire(n);
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}
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void GtkYieldMutex::ThreadsLeave()
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{
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- assert(m_nCount != 0);
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+ const bool bLeaveWithoutEnter = m_nCount == 0;
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+ SAL_WARN_IF(bLeaveWithoutEnter, "vcl.gtk", "gdk_threads_leave without matching gdk_threads_enter");
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yieldCounts.push(m_nCount);
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+ if G_UNLIKELY(bLeaveWithoutEnter) // this ideally shouldn't happen, but can due to the gtk3 file dialog
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+ return;
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release(true);
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}
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--
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2.31.1
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