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_EnvironmentObject_inl_h
8 #define vm_EnvironmentObject_inl_h
9
10 #include "vm/EnvironmentObject.h"
11
12 #include "vm/JSObject-inl.h"
13
14 namespace js {
15
16 inline ExtensibleLexicalEnvironmentObject&
NearestEnclosingExtensibleLexicalEnvironment(JSObject * env)17 NearestEnclosingExtensibleLexicalEnvironment(JSObject* env) {
18 MOZ_ASSERT(env);
19 while (!env->is<ExtensibleLexicalEnvironmentObject>()) {
20 env = env->enclosingEnvironment();
21 MOZ_ASSERT(env);
22 }
23 return env->as<ExtensibleLexicalEnvironmentObject>();
24 }
25
26 // Returns the innermost "qualified var object" on the environment chain.
27 // See the JSObject::isQualifiedVarObj comment for more info.
GetVariablesObject(JSObject * envChain)28 inline JSObject& GetVariablesObject(JSObject* envChain) {
29 while (!envChain->isQualifiedVarObj()) {
30 envChain = envChain->enclosingEnvironment();
31 }
32 MOZ_ASSERT(envChain);
33 return *envChain;
34 }
35
aliasedBinding(EnvironmentCoordinate ec)36 inline const Value& EnvironmentObject::aliasedBinding(
37 EnvironmentCoordinate ec) {
38 MOZ_ASSERT(!IsExtensibleLexicalEnvironment(this));
39 MOZ_ASSERT(nonExtensibleIsFixedSlot(ec) ==
40 NativeObject::isFixedSlot(ec.slot()));
41 return getSlot(ec.slot());
42 }
43
setAliasedBinding(JSContext * cx,uint32_t slot,const Value & v)44 inline void EnvironmentObject::setAliasedBinding(JSContext* cx, uint32_t slot,
45 const Value& v) {
46 setSlot(slot, v);
47 }
48
setAliasedBinding(JSContext * cx,EnvironmentCoordinate ec,const Value & v)49 inline void EnvironmentObject::setAliasedBinding(JSContext* cx,
50 EnvironmentCoordinate ec,
51 const Value& v) {
52 MOZ_ASSERT(!IsExtensibleLexicalEnvironment(this));
53 MOZ_ASSERT(nonExtensibleIsFixedSlot(ec) ==
54 NativeObject::isFixedSlot(ec.slot()));
55 setAliasedBinding(cx, ec.slot(), v);
56 }
57
setAliasedBinding(JSContext * cx,const BindingIter & bi,const Value & v)58 inline void EnvironmentObject::setAliasedBinding(JSContext* cx,
59 const BindingIter& bi,
60 const Value& v) {
61 MOZ_ASSERT(bi.location().kind() == BindingLocation::Kind::Environment);
62 setAliasedBinding(cx, bi.location().slot(), v);
63 }
64
setAliasedFormalFromArguments(const Value & argsValue,const Value & v)65 inline void CallObject::setAliasedFormalFromArguments(const Value& argsValue,
66 const Value& v) {
67 setSlot(ArgumentsObject::SlotFromMagicScopeSlotValue(argsValue), v);
68 }
69
70 } /* namespace js */
71
enclosingEnvironment()72 inline JSObject* JSObject::enclosingEnvironment() const {
73 if (is<js::EnvironmentObject>()) {
74 return &as<js::EnvironmentObject>().enclosingEnvironment();
75 }
76
77 if (is<js::DebugEnvironmentProxy>()) {
78 return &as<js::DebugEnvironmentProxy>().enclosingEnvironment();
79 }
80
81 if (is<js::GlobalObject>()) {
82 return nullptr;
83 }
84
85 MOZ_ASSERT_IF(is<JSFunction>(), as<JSFunction>().isInterpreted());
86 return &nonCCWGlobal();
87 }
88
89 #endif /* vm_EnvironmentObject_inl_h */
90