1 files changed, 146 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4stacktrace.cpp b/src/qml/jsruntime/qv4stacktrace.cpp
new file mode 100644
index 0000000000..1cc2e53556
--- /dev/null
+++ b/src/qml/jsruntime/qv4stacktrace.cpp
@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 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.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#if defined(_WIN32)
+#include <windows.h>
+#include <DbgHelp.h>
+#endif
+
+#include "qv4stacktrace_p.h"
+#include "qv4function_p.h"
+#include "qv4engine_p.h"
+#include "qv4unwindhelper_p.h"
+
+#if (defined(Q_OS_LINUX) && !defined(Q_OS_ANDROID)) || defined(Q_OS_MAC)
+#define HAVE_GNU_BACKTRACE
+#include <execinfo.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+using namespace QV4;
+
+NativeStackTrace::NativeStackTrace(ExecutionContext *context)
+{
+    engine = context->engine;
+    currentNativeFrame = 0;
+
+#if defined(HAVE_GNU_BACKTRACE)
+    UnwindHelper::prepareForUnwind(context);
+
+    nativeFrameCount = backtrace(&trace[0], sizeof(trace) / sizeof(trace[0]));
+#elif defined(Q_OS_WIN)
+
+    int machineType = 0;
+
+    CONTEXT winContext;
+    memset(&winContext, 0, sizeof(winContext));
+    winContext.ContextFlags = CONTEXT_FULL;
+    RtlCaptureContext(&winContext);
+
+    STACKFRAME64 sf64;
+    memset(&sf64, 0, sizeof(sf64));
+
+#if defined(Q_PROCESSOR_X86_32)
+    machineType = IMAGE_FILE_MACHINE_I386;
+
+    sf64.AddrFrame.Offset = winContext.Ebp;
+    sf64.AddrFrame.Mode = AddrModeFlat;
+    sf64.AddrPC.Offset = winContext.Eip;
+    sf64.AddrPC.Mode = AddrModeFlat;
+    sf64.AddrStack.Offset = winContext.Esp;
+    sf64.AddrStack.Mode = AddrModeFlat;
+
+#elif defined(Q_PROCESSOR_X86_64)
+    machineType = IMAGE_FILE_MACHINE_AMD64;
+
+    sf64.AddrFrame.Offset = winContext.Rbp;
+    sf64.AddrFrame.Mode = AddrModeFlat;
+    sf64.AddrPC.Offset = winContext.Rip;
+    sf64.AddrPC.Mode = AddrModeFlat;
+    sf64.AddrStack.Offset = winContext.Rsp;
+    sf64.AddrStack.Mode = AddrModeFlat;
+
+#else
+#error "Platform unsupported!"
+#endif
+
+    nativeFrameCount = 0;
+
+    while (StackWalk64(machineType, GetCurrentProcess(), GetCurrentThread(), &sf64, &winContext, 0, SymFunctionTableAccess64, SymGetModuleBase64, 0)) {
+
+        if (sf64.AddrReturn.Offset == 0)
+            break;
+
+        trace[nativeFrameCount] = reinterpret_cast<void*>(sf64.AddrReturn.Offset);
+        nativeFrameCount++;
+        if (nativeFrameCount >= sizeof(trace) / sizeof(trace[0]))
+            break;
+    }
+
+#else
+    nativeFrameCount = 0;
+#endif
+    }
+
+NativeFrame NativeStackTrace::nextFrame() {
+    NativeFrame frame;
+    frame.function = 0;
+    frame.line = -1;
+
+    for (; currentNativeFrame < nativeFrameCount && !frame.function; ++currentNativeFrame) {
+        quintptr pc = reinterpret_cast<quintptr>(trace[currentNativeFrame]);
+        // The pointers from the back trace point to the return address, but we are interested in
+        // the caller site.
+        pc = pc - 1;
+
+        Function *f = engine->functionForProgramCounter(pc);
+        if (!f)
+            continue;
+
+        frame.function = f;
+        frame.line = f->lineNumberForProgramCounter(pc - reinterpret_cast<quintptr>(f->code));
+    }
+
+    return frame;
+}
+
+QT_END_NAMESPACE