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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2             :  * vim: set ts=8 sts=4 et sw=4 tw=99:
       3             :  * This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef vm_SavedStacksInl_h
       8             : #define vm_SavedStacksInl_h
       9             : 
      10             : #include "vm/SavedStacks.h"
      11             : 
      12             : // Assert that if the given object is not null, it's Class is the
      13             : // SavedFrame::class_ or the given object is a cross-compartment or Xray wrapper
      14             : // around such an object.
      15             : //
      16             : // We allow wrappers here because the JSAPI functions for working with
      17             : // SavedFrame objects and the SavedFrame accessors themselves handle wrappers
      18             : // and use the original caller's compartment's principals to determine what
      19             : // level of data to present. Unwrapping and entering the referent's compartment
      20             : // would mess that up. See the module level documentation in
      21             : // `js/src/vm/SavedStacks.h` as well as the comments in `js/src/jsapi.h`.
      22             : inline void
      23           6 : js::AssertObjectIsSavedFrameOrWrapper(JSContext* cx, HandleObject stack)
      24             : {
      25           6 :     if (stack)
      26           6 :         MOZ_RELEASE_ASSERT(js::SavedFrame::isSavedFrameOrWrapperAndNotProto(*stack));
      27           6 : }
      28             : 
      29             : #endif // vm_SavedStacksInl_h