Exemple #1
0
inline void vframeStreamCommon::fill_from_compiled_frame(int decode_offset) {
  _mode = compiled_mode;

  // Range check to detect ridiculous offsets.
  if (decode_offset == DebugInformationRecorder::serialized_null ||
      decode_offset < 0 ||
      decode_offset >= nm()->scopes_data_size()) {
    // 6379830 AsyncGetCallTrace sometimes feeds us wild frames.
    // If we attempt to read nmethod::scopes_data at serialized_null (== 0),
    // or if we read some at other crazy offset,
    // we will decode garbage and make wild references into the heap,
    // leading to crashes in product mode.
    // (This isn't airtight, of course, since there are internal
    // offsets which are also crazy.)
#ifdef ASSERT
    if (WizardMode) {
      tty->print_cr("Error in fill_from_frame: pc_desc for "
                    INTPTR_FORMAT " not found or invalid at %d",
                    _frame.pc(), decode_offset);
      nm()->print();
      nm()->method()->print_codes();
      nm()->print_code();
      nm()->print_pcs();
    }
#endif
    // Provide a cheap fallback in product mode.  (See comment above.)
    found_bad_method_frame();
    fill_from_compiled_native_frame();
    return;
  }

  // Decode first part of scopeDesc
  DebugInfoReadStream buffer(nm(), decode_offset);
  _sender_decode_offset = buffer.read_int();
  _method               = methodOop(buffer.read_oop());
  _bci                  = buffer.read_bci();

  assert(_method->is_method(), "checking type of decoded method");
}
 // Set operations
 void set(methodOop method) {
   assert(method->is_method(), "must be method");
   _result = oop(method);
 }