Bionic's linker runs ELF constructors

linker_soinfo.cpp

// Mangled as __dl__ZL10call_arrayIPFviPPcS1_EEvPKcPT_mbS5_ in /system/bin/linker64

template <typename F>
static void call_array(const char* array_name __unused,
                       F* functions,
                       size_t count,
                       bool reverse,
                       const char* realpath) {
  if (functions == nullptr) {
    return;
  }

  TRACE("[ Calling %s (size %zd) @ %p for '%s' ]", array_name, count, functions, realpath);

  int begin = reverse ? (count - 1) : 0;
  int end = reverse ? -1 : count;
  int step = reverse ? -1 : 1;

  for (int i = begin; i != end; i += step) {
    TRACE("[ %s[%d] == %p ]", array_name, i, functions[i]);
    call_function("function", functions[i], realpath);
  }

  TRACE("[ Done calling %s for '%s' ]", array_name, realpath);
}