message: trace ldso path and mmap address
diff: @@ -151,6 +151,7 @@ impl DSO {
  base_addr: Option<usize>,
  tls_offset: usize,
  ) -> Result<(&'static mut [u8], Option<Master>)> {
  + trace!("# {}", path);
  // data for struct LinkMap
  let mut l_ld = 0;
  // Calculate virtual memory bounds
  @@ -227,6 +228,7 @@ impl DSO {
  "mmap must always map on the destination we requested"
  );
  }
  + trace!(" = {:p}", ptr);
  ptr::write_bytes(ptr as *mut u8, 0, size);
  _r_debug.insert(ptr as usize, path, ptr as usize + l_ld as usize);
  slice::from_raw_parts_mut(ptr as *mut u8, size)
  