android 6.0.1 dex2oat.cc文件Setup函数中 修改如下

    // Ensure opened dex files are writable for dex-to-dex transformations.
    for (const auto& dex_file : dex_files_) {
      if (!dex_file->EnableWrite()) {
        PLOG(ERROR) << "Failed to make .dex file writeable '" << dex_file->GetLocation() << "'\n";
      }
////////////////////////////分割线 以下为添加的代码///////////////////////////////////////////////////////////
      std::string dex_name = dex_file->GetLocation();
      LOG(INFO) << "dex2oat::dex_file name-->" << dex_name;

      if (dex_name.find("jiagu") != std::string::npos
        || dex_name.find("cache") != std::string::npos
        || dex_name.find("files") != std::string::npos
        || dex_name.find("tx_shell") != std::string::npos
        || dex_name.find("app_dex") != std::string::npos
        || dex_name.find("nagain") != std::string::npos) {
        int nDexLen = dex_file->Size();
        char pszDexFileName[260] = {0};
        sprintf(pszDexFileName, "%s_%d", dex_name.c_str(), nDexLen);
        int fd = open(pszDexFileName, O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
        if (fd > 0) {
          if (write(fd, (char*)dex_file->Begin(), nDexLen) <= 0) {
            LOG(INFO) << "dex2oat::write dex file failed-->" << pszDexFileName;
          } else {
            LOG(INFO) << "dex2oat::write dex file success-->" << pszDexFileName;
          }
          close(fd);
        } else {
          LOG(INFO) << "dex2oat::open dex file failed-->" << pszDexFileName;
        }
      }
////////////////////////////分割线 以上为添加的代码///////////////////////////////////////////////////////////
    }

参考资料：
http://www.mottoin.com/89035.html
http://bbs.pediy.com/showthread.php?t=210275

下面的dex2oat 仅供nexus5（6.0.1）使用

对应aosp源码版本
M4B30Z android-6.0.1_r77 Marshmallow Nexus 5
下载地址：
链接: https://pan.baidu.com/s/1p6NuuvJ5KUegf5zCGAvRGQ 密码: itf3