CallAndConstruct.cpp (5855B)
1 /* -*- Mode.h: 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 #include "js/CallAndConstruct.h" 8 9 #include "mozilla/Assertions.h" // MOZ_ASSERT 10 11 #include "jstypes.h" // JS_PUBLIC_API 12 #include "gc/Zone.h" // js::Zone 13 #include "js/Context.h" // AssertHeapIsIdle 14 #include "js/friend/ErrorMessages.h" // JSMSG_* 15 #include "js/RootingAPI.h" // JS::Rooted, JS::Handle, JS::MutableHandle 16 #include "js/Value.h" // JS::Value, JS::*Value 17 #include "js/ValueArray.h" // JS::HandleValueArray 18 #include "vm/BytecodeUtil.h" // JSDVG_IGNORE_STACK 19 #include "vm/Interpreter.h" // js::Call, js::Construct 20 #include "vm/JSAtomUtils.h" // js::Atomize 21 #include "vm/JSContext.h" // JSContext, CHECK_THREAD, ReportValueError 22 #include "vm/JSObject.h" // JSObject 23 #include "vm/Stack.h" // js::InvokeArgs, js::FillArgumentsFromArraylike, js::ConstructArgs 24 #include "vm/StringType.h" // JSAtom 25 26 #include "vm/JSAtomUtils-inl.h" // js::AtomToId 27 #include "vm/JSContext-inl.h" // JSContext::check 28 #include "vm/JSObject-inl.h" // js::IsConstructor 29 #include "vm/ObjectOperations-inl.h" // js::GetProperty 30 31 using namespace js; 32 33 JS_PUBLIC_API bool JS::IsCallable(JSObject* obj) { return obj->isCallable(); } 34 35 JS_PUBLIC_API bool JS::IsConstructor(JSObject* obj) { 36 return obj->isConstructor(); 37 } 38 39 JS_PUBLIC_API bool JS_CallFunctionValue(JSContext* cx, 40 JS::Handle<JSObject*> obj, 41 JS::Handle<JS::Value> fval, 42 const JS::HandleValueArray& args, 43 JS::MutableHandle<JS::Value> rval) { 44 MOZ_ASSERT(!cx->zone()->isAtomsZone()); 45 AssertHeapIsIdle(); 46 CHECK_THREAD(cx); 47 cx->check(obj, fval, args); 48 49 js::InvokeArgs iargs(cx); 50 if (!FillArgumentsFromArraylike(cx, iargs, args)) { 51 return false; 52 } 53 54 JS::Rooted<JS::Value> thisv(cx, JS::ObjectOrNullValue(obj)); 55 return js::Call(cx, fval, thisv, iargs, rval); 56 } 57 58 JS_PUBLIC_API bool JS_CallFunction(JSContext* cx, JS::Handle<JSObject*> obj, 59 JS::Handle<JSFunction*> fun, 60 const JS::HandleValueArray& args, 61 JS::MutableHandle<JS::Value> rval) { 62 MOZ_ASSERT(!cx->zone()->isAtomsZone()); 63 AssertHeapIsIdle(); 64 CHECK_THREAD(cx); 65 cx->check(obj, fun, args); 66 67 js::InvokeArgs iargs(cx); 68 if (!FillArgumentsFromArraylike(cx, iargs, args)) { 69 return false; 70 } 71 72 JS::Rooted<JS::Value> fval(cx, JS::ObjectValue(*fun)); 73 JS::Rooted<JS::Value> thisv(cx, JS::ObjectOrNullValue(obj)); 74 return js::Call(cx, fval, thisv, iargs, rval); 75 } 76 77 JS_PUBLIC_API bool JS_CallFunctionName(JSContext* cx, JS::Handle<JSObject*> obj, 78 const char* name, 79 const JS::HandleValueArray& args, 80 JS::MutableHandle<JS::Value> rval) { 81 MOZ_ASSERT(!cx->zone()->isAtomsZone()); 82 AssertHeapIsIdle(); 83 CHECK_THREAD(cx); 84 cx->check(obj, args); 85 86 JSAtom* atom = Atomize(cx, name, strlen(name)); 87 if (!atom) { 88 return false; 89 } 90 91 JS::Rooted<JS::Value> fval(cx); 92 JS::Rooted<jsid> id(cx, AtomToId(atom)); 93 if (!GetProperty(cx, obj, obj, id, &fval)) { 94 return false; 95 } 96 97 js::InvokeArgs iargs(cx); 98 if (!FillArgumentsFromArraylike(cx, iargs, args)) { 99 return false; 100 } 101 102 JS::Rooted<JS::Value> thisv(cx, JS::ObjectOrNullValue(obj)); 103 return js::Call(cx, fval, thisv, iargs, rval); 104 } 105 106 JS_PUBLIC_API bool JS::Call(JSContext* cx, JS::Handle<JS::Value> thisv, 107 JS::Handle<JS::Value> fval, 108 const JS::HandleValueArray& args, 109 JS::MutableHandle<JS::Value> rval) { 110 AssertHeapIsIdle(); 111 CHECK_THREAD(cx); 112 cx->check(thisv, fval, args); 113 114 js::InvokeArgs iargs(cx); 115 if (!FillArgumentsFromArraylike(cx, iargs, args)) { 116 return false; 117 } 118 119 return js::Call(cx, fval, thisv, iargs, rval); 120 } 121 122 JS_PUBLIC_API bool JS::Construct(JSContext* cx, JS::Handle<JS::Value> fval, 123 JS::Handle<JSObject*> newTarget, 124 const JS::HandleValueArray& args, 125 JS::MutableHandle<JSObject*> objp) { 126 AssertHeapIsIdle(); 127 CHECK_THREAD(cx); 128 cx->check(fval, newTarget, args); 129 130 if (!js::IsConstructor(fval)) { 131 ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, fval, 132 nullptr); 133 return false; 134 } 135 136 JS::Rooted<JS::Value> newTargetVal(cx, JS::ObjectValue(*newTarget)); 137 if (!js::IsConstructor(newTargetVal)) { 138 ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, 139 newTargetVal, nullptr); 140 return false; 141 } 142 143 js::ConstructArgs cargs(cx); 144 if (!FillArgumentsFromArraylike(cx, cargs, args)) { 145 return false; 146 } 147 148 return js::Construct(cx, fval, cargs, newTargetVal, objp); 149 } 150 151 JS_PUBLIC_API bool JS::Construct(JSContext* cx, JS::Handle<JS::Value> fval, 152 const JS::HandleValueArray& args, 153 JS::MutableHandle<JSObject*> objp) { 154 AssertHeapIsIdle(); 155 CHECK_THREAD(cx); 156 cx->check(fval, args); 157 158 if (!js::IsConstructor(fval)) { 159 ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, fval, 160 nullptr); 161 return false; 162 } 163 164 js::ConstructArgs cargs(cx); 165 if (!FillArgumentsFromArraylike(cx, cargs, args)) { 166 return false; 167 } 168 169 return js::Construct(cx, fval, cargs, fval, objp); 170 }