summaryrefslogtreecommitdiff
path: root/gnu/packages/patches/qtbase-fix-krita-deadlock.patch
diff options
context:
space:
mode:
Diffstat (limited to 'gnu/packages/patches/qtbase-fix-krita-deadlock.patch')
-rw-r--r--gnu/packages/patches/qtbase-fix-krita-deadlock.patch110
1 files changed, 0 insertions, 110 deletions
diff --git a/gnu/packages/patches/qtbase-fix-krita-deadlock.patch b/gnu/packages/patches/qtbase-fix-krita-deadlock.patch
deleted file mode 100644
index d3554be3c9..0000000000
--- a/gnu/packages/patches/qtbase-fix-krita-deadlock.patch
+++ /dev/null
@@ -1,110 +0,0 @@
-Fix a deadlock in Krita:
-
-https://bugreports.qt.io/browse/QTBUG-83207
-
-Patch copied from Qt bug tracker:
-
-https://codereview.qt-project.org/c/qt/qtbase/+/296034
-
-From 276fa8383a7535765be7182883ef4aade17ce013 Mon Sep 17 00:00:00 2001
-From: Thiago Macieira <thiago.macieira@intel.com>
-Date: Thu, 02 Apr 2020 12:08:41 -0300
-Subject: [PATCH] QLibrary: fix deadlock caused by fix to QTBUG-39642
-
-Commit ae6f73e8566fa76470937aca737141183929a5ec inserted a mutex around
-the entire load_sys(). We had reasoed that deadlocks would only occur if
-the object creation in instance() recursed into its own instance(),
-which was already a bug. But we had forgotten that dlopen()/
-LoadLibrary() executes initialization code from the module being loaded,
-which could cause a recursion back into the same QPluginLoader or
-QLibrary object. This recursion is benign because the module *is* loaded
-and dlopen()/LoadLibrary() returns the same handle.
-
-[ChangeLog][QtCore][QLibrary and QPluginLoader] Fixed a deadlock that
-would happen if the plugin or library being loaded has load-time
-initialization code (C++ global variables) that recursed back into the
-same QLibrary or QPluginLoader object.
-
-PS: QLibraryPrivate::loadPlugin() updates pluginState outside a mutex
-lock, so pluginState should be made an atomic variable. Once that is
-done, we'll only need locking the mutex to update errorString (no
-locking before loading).
-
-Fixes: QTBUG-83207
-Task-number: QTBUG-39642
-Change-Id: Ibdc95e9af7bd456a94ecfffd160209304e5ab2eb
-Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
-Reviewed-by: David Faure <david.faure@kdab.com>
----
-
-diff --git a/src/corelib/plugin/qlibrary.cpp b/src/corelib/plugin/qlibrary.cpp
-index ddb053c..be9d92b 100644
---- a/src/corelib/plugin/qlibrary.cpp
-+++ b/src/corelib/plugin/qlibrary.cpp
-@@ -576,9 +576,7 @@
-
- Q_TRACE(QLibraryPrivate_load_entry, fileName);
-
-- mutex.lock();
- bool ret = load_sys();
-- mutex.unlock();
- if (qt_debug_component()) {
- if (ret) {
- qDebug() << "loaded library" << fileName;
-diff --git a/src/corelib/plugin/qlibrary_unix.cpp b/src/corelib/plugin/qlibrary_unix.cpp
-index 017aa97..a5c72f8 100644
---- a/src/corelib/plugin/qlibrary_unix.cpp
-+++ b/src/corelib/plugin/qlibrary_unix.cpp
-@@ -123,6 +123,7 @@
-
- bool QLibraryPrivate::load_sys()
- {
-+ QMutexLocker locker(&mutex);
- QString attempt;
- QFileSystemEntry fsEntry(fileName);
-
-@@ -213,6 +214,7 @@
- }
- #endif
-
-+ locker.unlock();
- bool retry = true;
- Handle hnd = nullptr;
- for (int prefix = 0; retry && !hnd && prefix < prefixes.size(); prefix++) {
-@@ -273,6 +275,8 @@
- }
- }
- #endif
-+
-+ locker.relock();
- if (!hnd) {
- errorString = QLibrary::tr("Cannot load library %1: %2").arg(fileName, qdlerror());
- }
-diff --git a/src/corelib/plugin/qlibrary_win.cpp b/src/corelib/plugin/qlibrary_win.cpp
-index 000bf76..ef58724 100644
---- a/src/corelib/plugin/qlibrary_win.cpp
-+++ b/src/corelib/plugin/qlibrary_win.cpp
-@@ -78,6 +78,7 @@
- // fileName
- //
- // NB If it's a plugin we do not ever try the ".dll" extension
-+ QMutexLocker locker(&mutex);
- QStringList attempts;
-
- if (pluginState != IsAPlugin)
-@@ -95,6 +96,7 @@
- attempts.prepend(QDir::rootPath() + fileName);
- #endif
-
-+ locker.unlock();
- Handle hnd = nullptr;
- for (const QString &attempt : qAsConst(attempts)) {
- #ifndef Q_OS_WINRT
-@@ -115,6 +117,7 @@
- #ifndef Q_OS_WINRT
- SetErrorMode(oldmode);
- #endif
-+ locker.relock();
- if (!hnd) {
- errorString = QLibrary::tr("Cannot load library %1: %2").arg(
- QDir::toNativeSeparators(fileName), qt_error_string());