text: // Copyright 2017 Espressif Systems (Shanghai) PTE LTD
  //
  // 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 <stdlib.h>
  #include "sdkconfig.h"
  #include "esp_system.h"
  
  #if CONFIG_COMPILER_STACK_CHECK
  
  #define LOG_LOCAL_LEVEL CONFIG_LOG_DEFAULT_LEVEL
  #include "esp_log.h"
  const static char *TAG = "stack_chk";
  
  void *__stack_chk_guard = NULL;
  
  static void __attribute__ ((constructor))
  __esp_stack_guard_setup (void)
  {
      ESP_LOGD(TAG, "Intialize random stack guard");
      __stack_chk_guard = (void *)esp_random();
  }
  
  void __stack_chk_fail (void)
  {
      ets_printf("\r\nStack smashing protect failure!\r\n\r\n");
      abort();
  }
  
  #endif
  