SavedStacks-inl.h (1271B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- 2 * vim: set ts=8 sts=2 et sw=2 tw=80: 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 js::AssertObjectIsSavedFrameOrWrapper(JSContext* cx, 23 HandleObject stack) { 24 if (stack) { 25 MOZ_RELEASE_ASSERT(stack->canUnwrapAs<SavedFrame>()); 26 } 27 } 28 29 #endif // vm_SavedStacksInl_h