V4: Generate function tables on 64bit windows

In order for global exception handlers to be called reliably, the runtime
needs to unwind through JIT-generated code. This can be facilitated by
installing a "function table" for each JITed function that specifies "use
the frame pointer".

Also make sure to generate a function table for JIT'ed regular
expressions. Those were forgotten also in the linux case.

Fixes: QTBUG-50061
Change-Id: Ib0b8ae9356ed80afe1cab017e36efa4ccbe73f90
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 65 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4functiontable_noop.cpp b/src/qml/jsruntime/qv4functiontable_noop.cpp
new file mode 100644
index 0000000000..31c198eb00
--- /dev/null
+++ b/src/qml/jsruntime/qv4functiontable_noop.cpp
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qv4functiontable_p.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+void generateFunctionTable(Function *function, JSC::MacroAssemblerCodeRef *codeRef)
+{
+    Q_UNUSED(function);
+    Q_UNUSED(codeRef);
+}
+
+void destroyFunctionTable(Function *function, JSC::MacroAssemblerCodeRef *codeRef)
+{
+    Q_UNUSED(function);
+    Q_UNUSED(codeRef);
+}
+
+size_t exceptionHandlerSize()
+{
+    return 0;
+}
+
+} // QV4
+
+QT_END_NAMESPACE