C++ (Cpp) verify_deopt_original_pc示例

示例#1

文件： frame_x86.cpp 项目： apurtell/jdk8u-hotspot

//------------------------------------------------------------------------------
// frame::adjust_unextended_sp
void frame::adjust_unextended_sp() {
  // On x86, sites calling method handle intrinsics and lambda forms are treated
  // as any other call site. Therefore, no special action is needed when we are
  // returning to any of these call sites.

  nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null();
  if (sender_nm != NULL) {
    // If the sender PC is a deoptimization point, get the original PC.
    if (sender_nm->is_deopt_entry(_pc) ||
        sender_nm->is_deopt_mh_entry(_pc)) {
      DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp));
    }
  }
}

示例#2

文件： frame_x86.cpp 项目： zarue/jdk7u-hotspot

//------------------------------------------------------------------------------
// frame::adjust_unextended_sp
void frame::adjust_unextended_sp() {
  // If we are returning to a compiled MethodHandle call site, the
  // saved_fp will in fact be a saved value of the unextended SP.  The
  // simplest way to tell whether we are returning to such a call site
  // is as follows:

  nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null();
  if (sender_nm != NULL) {
    // If the sender PC is a deoptimization point, get the original
    // PC.  For MethodHandle call site the unextended_sp is stored in
    // saved_fp.
    if (sender_nm->is_deopt_mh_entry(_pc)) {
      DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, _fp));
      _unextended_sp = _fp;
    }
    else if (sender_nm->is_deopt_entry(_pc)) {
      DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp));
    }
    else if (sender_nm->is_method_handle_return(_pc)) {
      _unextended_sp = _fp;
    }
  }
}