debugger: fixes and improvements related to the Locals display

Split the concepts 'enabled' and 'editable' in the dumper output
Disable "<not in scope>" entries, also fix their type.
Fix glitch in type beautification for display
Find reason for failing bulk updates.

src/plugins/debugger/shared/backtrace.cpp

@@ -0,0 +1,87 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QDebug>
+#include <QtCore/QProcess>
+
+#if defined(Q_OS_LINUX)
+#include <stdio.h>
+#include <signal.h>
+#include <execinfo.h>
+#endif 
+
+namespace Debugger {
+namespace Internal {
+
+void dumpBacktrace(int maxdepth)
+{
+    if (maxdepth == -1)
+        maxdepth = 200;
+#if defined(Q_OS_LINUX)
+    void *bt[200] = {0};
+    qDebug() << "BACKTRACE:";
+    int size = backtrace(bt, sizeof(bt) / sizeof(bt[0]));
+    for (int i = 0; i < qMin(size, maxdepth); i++)
+        qDebug() << "0x" + QByteArray::number(quintptr(bt[i]), 16);
+    QProcess proc;
+    QStringList args;
+    args.append("-e");
+    args.append(QCoreApplication::arguments().at(0));
+    proc.start("addr2line", args);
+    proc.waitForStarted();
+    for (int i = 0; i < qMin(size, maxdepth); i++)
+        proc.write("0x" + QByteArray::number(quintptr(bt[i]), 16) + "\n");
+    proc.closeWriteChannel();
+    QByteArray out = proc.readAllStandardOutput();
+    qDebug() << QCoreApplication::arguments().at(0);
+    qDebug() << out;
+    proc.waitForFinished();
+    out = proc.readAllStandardOutput();
+    qDebug() << out;
+#endif
+}
+
+/*
+void installSignalHandlers()
+{
+#if defined(Q_OS_LINUX)
+    struct sigaction SignalAction;
+
+    SignalAction.sa_sigaction = handler;
+    sigemptyset(&SignalAction.sa_mask);
+    SignalAction.sa_flags = SA_SIGINFO;
+    sigaction(SIGSEGV, &SignalAction, NULL);
+    sigaction(SIGABRT, &SignalAction, NULL);
+#endif
+}
+*/
+
+} // namespace Internal
+} // namespace Debugger