/*
 * 只使用GCC编译时，则使用 -g -rdynamic选项
 * CMake项目需分别使用add_compile_options(-g) add_link_options(-rdynamic)
 * 否则获取调用栈时不能得到函数名
 * 该配置仅支持GCC+Linux平台
 */
#include <execinfo.h>

  QString WriteStackTrace(const QString &aStackTrace)
  {
    QString path = QDir::homePath() + "/.local/share/spark-store/crash/";
    QFile StackTraceFile;
    if(!QDir().exists(path))
      if(!QDir().mkpath(path))
        return QObject::tr("Stack trace directory %1 cannot be created. "
                           "Stack trace wasn't saved.").arg(path);
    path += QString::number(QDateTime::currentDateTimeUtc().toSecsSinceEpoch());
    while(QFile::exists(path))
      path += "_";
    StackTraceFile.setFileName(path);
    StackTraceFile.open(QIODevice::WriteOnly);
    if(StackTraceFile.isOpen() && StackTraceFile.isWritable())
    {
      QTextStream StackTraceWriter;
      StackTraceWriter.setDevice(&StackTraceFile);
      StackTraceWriter << QDateTime::currentDateTime().toLocalTime().toString() << "\n\n";
      StackTraceWriter << aStackTrace;
      StackTraceFile.close();
      return QObject::tr("Stack trace written to \"%1\".").arg(path);
    }
    return QObject::tr("Stack trace file %1 cannot be opened. "
                       "Stack trace wasn't saved.").arg(path);
  }

  void CrashSignalHandler(int sig)
  {
    QString msg("Program has received signal %1 during normal execution.\n\n");
    switch(sig)
    {
      case SIGSEGV:
        msg = msg.arg(QObject::tr("\"SIGSEGV\" (Segmentation fault)"));
        goto CRASH;
      case SIGFPE:
        msg = msg.arg(QObject::tr("\"SIGFPE\" (Arithmetic exception)"));
        goto CRASH;
      case SIGABRT:
        msg = msg.arg(QObject::tr("\"SIGABRT\" (Abort)"));
      CRASH:
        {
          void* TraceStack[StackTraceArraySize];
          int StackTraceSize = backtrace(TraceStack, StackTraceArraySize);
          auto TraceTextArray = backtrace_symbols(TraceStack, StackTraceArraySize);
          msg += QString(QObject::tr("Stack trace:\n"));
          for(int i = 0; i < StackTraceSize; i++)
            msg += QString::number(i) + ">  " + QString(TraceTextArray[i]) + '\n';
          msg += "\n\nSpark Store cannot continue.\n\n";
          msg += WriteStackTrace(msg);
          QMessageBox::critical(nullptr, QObject::tr("Spark Store Crashed"),
                                msg);
          exit(2);
        }
      default:
        SpkLog::Error(QObject::tr("Unknown signal %1 received in crash handler. "
                                  "Program internals may be corrupted. Please decide if you want "
                                  "to continue execution.").arg(sig), true);
    }