text: /*
   * Copyright (c) 2019 Advanced Micro Devices, Inc.
   * All rights reserved.
   *
   * For use for simulation and test purposes only
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   *
   * 3. Neither the name of the copyright holder nor the names of its
   * contributors may be used to endorse or promote products derived from this
   * software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * Authors: Brandon Potter
   */
  
  #include <sys/mman.h>
  
  #include <cstdint>
  #include <cstdio>
  #include <cstdlib>
  #include <ctime>
  
  int main(void)
  {
      uint64_t page_size = 0x1000;
      uint64_t num_pages = 0x10000;
      uint64_t length = page_size * num_pages;
  
      void *raw = mmap(NULL, length, PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
      uint8_t *mem = reinterpret_cast<uint8_t*>(raw);
  
      srand(0xABCD);
  
      uint64_t last_byte = page_size - 1;
      uint64_t page_boundaries = num_pages - 1;
  
      for (int i = 0; i < 2000; i++) {
          uint64_t random_boundary = rand() % page_boundaries;
          uint64_t boundary_offset = random_boundary * page_size;
          uint64_t boundary_last_byte = boundary_offset + last_byte;
          uint32_t *poke = reinterpret_cast<uint32_t*>(mem + boundary_last_byte);
          printf("%p\n", poke);
          uint32_t value = *poke;
      }
  
      return 0;
  }
  