C++ Flags::Test方法代码示例

Error
ProcessMachCore::GetMemoryRegionInfo(addr_t load_addr, MemoryRegionInfo &region_info)
{
    region_info.Clear();
    const VMRangeToPermissions::Entry *permission_entry = m_core_range_infos.FindEntryThatContainsOrFollows(load_addr);
    if (permission_entry)
    {
        if (permission_entry->Contains(load_addr))
        {
            region_info.GetRange().SetRangeBase(permission_entry->GetRangeBase());
            region_info.GetRange().SetRangeEnd(permission_entry->GetRangeEnd());
            const Flags permissions(permission_entry->data);
            region_info.SetReadable(permissions.Test(ePermissionsReadable) ? MemoryRegionInfo::eYes
                                                                           : MemoryRegionInfo::eNo);
            region_info.SetWritable(permissions.Test(ePermissionsWritable) ? MemoryRegionInfo::eYes
                                                                           : MemoryRegionInfo::eNo);
            region_info.SetExecutable(permissions.Test(ePermissionsExecutable) ? MemoryRegionInfo::eYes
                                                                               : MemoryRegionInfo::eNo);
        }
        else if (load_addr < permission_entry->GetRangeBase())
        {
            region_info.GetRange().SetRangeBase(load_addr);
            region_info.GetRange().SetRangeEnd(permission_entry->GetRangeBase());
            region_info.SetReadable(MemoryRegionInfo::eNo);
            region_info.SetWritable(MemoryRegionInfo::eNo);
            region_info.SetExecutable(MemoryRegionInfo::eNo);
        }
        return Error();
    }

    return Error("invalid address");
}

bool
ThreadPlanShouldStopHere::DefaultShouldStopHereCallback (ThreadPlan *current_plan,
                                                         Flags &flags,
                                                         FrameComparison operation,
                                                         void *baton)
{
    bool should_stop_here = true;
    StackFrame *frame = current_plan->GetThread().GetStackFrameAtIndex(0).get();
    if (!frame)
        return true;
    
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));

    if ((operation == eFrameCompareOlder && flags.Test(eStepOutAvoidNoDebug))
        || (operation == eFrameCompareYounger && flags.Test(eStepInAvoidNoDebug))
        || (operation == eFrameCompareSameParent && flags.Test(eStepInAvoidNoDebug)))
    {
        if (!frame->HasDebugInformation())
        {
            if (log)
                log->Printf ("Stepping out of frame with no debug info");

            should_stop_here = false;
        }
    }
    
    // Always avoid code with line number 0.
    // FIXME: At present the ShouldStop and the StepFromHere calculate this independently.  If this ever
    // becomes expensive (this one isn't) we can try to have this set a state that the StepFromHere can use.
    if (frame)
    {
        SymbolContext sc;
        sc = frame->GetSymbolContext (eSymbolContextLineEntry);
        if (sc.line_entry.line == 0)
            should_stop_here = false;
    }
    
    return should_stop_here;
}

void Log::WriteMessage(const std::string &message) {
  // Make a copy of our stream shared pointer in case someone disables our log
  // while we are logging and releases the stream
  auto stream_sp = GetStream();
  if (!stream_sp)
    return;

  Flags options = GetOptions();
  if (options.Test(LLDB_LOG_OPTION_THREADSAFE)) {
    static std::recursive_mutex g_LogThreadedMutex;
    std::lock_guard<std::recursive_mutex> guard(g_LogThreadedMutex);
    *stream_sp << message;
    stream_sp->flush();
  } else {
    *stream_sp << message;
    stream_sp->flush();
  }
}

void Log::WriteHeader(llvm::raw_ostream &OS, llvm::StringRef file,
                      llvm::StringRef function) {
  Flags options = GetOptions();
  static uint32_t g_sequence_id = 0;
  // Add a sequence ID if requested
  if (options.Test(LLDB_LOG_OPTION_PREPEND_SEQUENCE))
    OS << ++g_sequence_id << " ";

  // Timestamp if requested
  if (options.Test(LLDB_LOG_OPTION_PREPEND_TIMESTAMP)) {
    auto now = std::chrono::duration<double>(
        std::chrono::system_clock::now().time_since_epoch());
    OS << llvm::formatv("{0:f9} ", now.count());
  }

  // Add the process and thread if requested
  if (options.Test(LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD))
    OS << llvm::formatv("[{0,0+4}/{1,0+4}] ", getpid(),
                        llvm::get_threadid());

  // Add the thread name if requested
  if (options.Test(LLDB_LOG_OPTION_PREPEND_THREAD_NAME)) {
    llvm::SmallString<32> thread_name;
    llvm::get_thread_name(thread_name);

    llvm::SmallString<12> format_str;
    llvm::raw_svector_ostream format_os(format_str);
    format_os << "{0,-" << llvm::alignTo<16>(thread_name.size()) << "} ";
    OS << llvm::formatv(format_str.c_str(), thread_name);
  }

  if (options.Test(LLDB_LOG_OPTION_BACKTRACE))
    llvm::sys::PrintStackTrace(OS);

  if (options.Test(LLDB_LOG_OPTION_PREPEND_FILE_FUNCTION) &&
      (!file.empty() || !function.empty())) {
    file = llvm::sys::path::filename(file).take_front(40);
    function = function.take_front(40);
    OS << llvm::formatv("{0,-60:60} ", (file + ":" + function).str());
  }
}