text: /**
   * Copyright 2004-present, Facebook, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include <plthooks/plthooks.h>
  #include <time.h>
  
  clock_t second_hook_clock() {
    return (CALL_PREV(second_hook_clock, clock_t(*)()) << 16) | 0xb00c;
  }
  
  static void* handle;
  
  int perform_hook() {
    handle = dlopen("libtarget.so", RTLD_LOCAL);
    if (handle == 0) {
      return 0;
    }
  
    if (plthooks_initialize() != 0) {
      return 0;
    }
  
    if (hook_plt_method("libtarget.so", "clock", (void*)second_hook_clock) != 0) {
      return 0;
    }
  
    return 1;
  }
  
  int cleanup() {
    if (unhook_plt_method("libtarget.so", "clock", (void*)second_hook_clock) != 0) {
      return 0;
    }
  
    if (dlclose(handle) != 0) {
      return 0;
    }
  
    return 1;
  }
  