main.cpp


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#include <iostream>
#include <unistd.h>
#include <sys/mman.h>
#include <string>

#define GIG (1024*1024*1024ul)
#define VOLUME (2ul*GIG)

// Real values is in the ~65536, only use half of it to be safe
// sysctl vm.max_map_count
#define MAXMMAPS 32768

int main(int argc, char **argv) {
  auto page_size = sysconf(_SC_PAGESIZE);
  std::cout << "The system have a page size of " << page_size << std::endl;
  auto dst = (long*)malloc(VOLUME);
  // Src is using anonymous mapping
  long nmaps = std::stoi(argv[1]);
  if (GIG % (page_size * nmaps) != 0) {
    std::cout << "nmaps is not perfect multiple" << std::endl;
    nmaps = GIG / (page_size * nmaps);
  }
  std::cout << argv[1] << std::endl;
  uint8_t *hint = (uint8_t*)0x600000000000UL;
  mmap(hint);
  auto src =
  return 0;
}