michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * JavaScript bytecode interpreter.
michael@0:  */
michael@0: 
michael@0: #include "vm/Interpreter-inl.h"
michael@0: 
michael@0: #include "mozilla/DebugOnly.h"
michael@0: #include "mozilla/FloatingPoint.h"
michael@0: #include "mozilla/PodOperations.h"
michael@0: 
michael@0: #include <string.h>
michael@0: 
michael@0: #include "jsarray.h"
michael@0: #include "jsatom.h"
michael@0: #include "jscntxt.h"
michael@0: #include "jsfun.h"
michael@0: #include "jsgc.h"
michael@0: #include "jsiter.h"
michael@0: #include "jslibmath.h"
michael@0: #include "jsnum.h"
michael@0: #include "jsobj.h"
michael@0: #include "jsopcode.h"
michael@0: #include "jsprf.h"
michael@0: #include "jsscript.h"
michael@0: #include "jsstr.h"
michael@0: 
michael@0: #include "builtin/Eval.h"
michael@0: #include "jit/BaselineJIT.h"
michael@0: #include "jit/Ion.h"
michael@0: #include "jit/IonAnalysis.h"
michael@0: #include "js/OldDebugAPI.h"
michael@0: #include "vm/Debugger.h"
michael@0: #include "vm/Opcodes.h"
michael@0: #include "vm/Shape.h"
michael@0: #include "vm/TraceLogging.h"
michael@0: 
michael@0: #include "jsatominlines.h"
michael@0: #include "jsboolinlines.h"
michael@0: #include "jsfuninlines.h"
michael@0: #include "jsinferinlines.h"
michael@0: #include "jsscriptinlines.h"
michael@0: 
michael@0: #include "jit/IonFrames-inl.h"
michael@0: #include "vm/Probes-inl.h"
michael@0: #include "vm/ScopeObject-inl.h"
michael@0: #include "vm/Stack-inl.h"
michael@0: 
michael@0: using namespace js;
michael@0: using namespace js::gc;
michael@0: using namespace js::types;
michael@0: 
michael@0: using mozilla::DebugOnly;
michael@0: using mozilla::NumberEqualsInt32;
michael@0: using mozilla::PodCopy;
michael@0: using JS::ForOfIterator;
michael@0: 
michael@0: /*
michael@0:  * Note: when Clang 3.2 (32-bit) inlines the two functions below in Interpret,
michael@0:  * the conservative stack scanner leaks a ton of memory and this negatively
michael@0:  * influences performance. The MOZ_NEVER_INLINE is a temporary workaround until
michael@0:  * we can remove the conservative scanner. See bug 849526 for more info.
michael@0:  */
michael@0: #if defined(__clang__) && defined(JS_CPU_X86)
michael@0: static MOZ_NEVER_INLINE bool
michael@0: #else
michael@0: static bool
michael@0: #endif
michael@0: ToBooleanOp(const InterpreterRegs &regs)
michael@0: {
michael@0:     return ToBoolean(regs.stackHandleAt(-1));
michael@0: }
michael@0: 
michael@0: template <bool Eq>
michael@0: #if defined(__clang__) && defined(JS_CPU_X86)
michael@0: static MOZ_NEVER_INLINE bool
michael@0: #else
michael@0: static bool
michael@0: #endif
michael@0: LooseEqualityOp(JSContext *cx, InterpreterRegs &regs)
michael@0: {
michael@0:     HandleValue rval = regs.stackHandleAt(-1);
michael@0:     HandleValue lval = regs.stackHandleAt(-2);
michael@0:     bool cond;
michael@0:     if (!LooselyEqual(cx, lval, rval, &cond))
michael@0:         return false;
michael@0:     cond = (cond == Eq);
michael@0:     regs.sp--;
michael@0:     regs.sp[-1].setBoolean(cond);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: JSObject *
michael@0: js::BoxNonStrictThis(JSContext *cx, HandleValue thisv)
michael@0: {
michael@0:     /*
michael@0:      * Check for SynthesizeFrame poisoning and fast constructors which
michael@0:      * didn't check their callee properly.
michael@0:      */
michael@0:     JS_ASSERT(!thisv.isMagic());
michael@0: 
michael@0:     if (thisv.isNullOrUndefined()) {
michael@0:         Rooted<GlobalObject*> global(cx, cx->global());
michael@0:         return JSObject::thisObject(cx, global);
michael@0:     }
michael@0: 
michael@0:     if (thisv.isObject())
michael@0:         return &thisv.toObject();
michael@0: 
michael@0:     return PrimitiveToObject(cx, thisv);
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * ECMA requires "the global object", but in embeddings such as the browser,
michael@0:  * which have multiple top-level objects (windows, frames, etc. in the DOM),
michael@0:  * we prefer fun's parent.  An example that causes this code to run:
michael@0:  *
michael@0:  *   // in window w1
michael@0:  *   function f() { return this }
michael@0:  *   function g() { return f }
michael@0:  *
michael@0:  *   // in window w2
michael@0:  *   var h = w1.g()
michael@0:  *   alert(h() == w1)
michael@0:  *
michael@0:  * The alert should display "true".
michael@0:  */
michael@0: bool
michael@0: js::BoxNonStrictThis(JSContext *cx, const CallReceiver &call)
michael@0: {
michael@0:     /*
michael@0:      * Check for SynthesizeFrame poisoning and fast constructors which
michael@0:      * didn't check their callee properly.
michael@0:      */
michael@0:     JS_ASSERT(!call.thisv().isMagic());
michael@0: 
michael@0: #ifdef DEBUG
michael@0:     JSFunction *fun = call.callee().is<JSFunction>() ? &call.callee().as<JSFunction>() : nullptr;
michael@0:     JS_ASSERT_IF(fun && fun->isInterpreted(), !fun->strict());
michael@0: #endif
michael@0: 
michael@0:     JSObject *thisObj = BoxNonStrictThis(cx, call.thisv());
michael@0:     if (!thisObj)
michael@0:         return false;
michael@0: 
michael@0:     call.setThis(ObjectValue(*thisObj));
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: #if JS_HAS_NO_SUCH_METHOD
michael@0: 
michael@0: static const uint32_t JSSLOT_FOUND_FUNCTION = 0;
michael@0: static const uint32_t JSSLOT_SAVED_ID = 1;
michael@0: 
michael@0: static const Class js_NoSuchMethodClass = {
michael@0:     "NoSuchMethod",
michael@0:     JSCLASS_HAS_RESERVED_SLOTS(2) | JSCLASS_IS_ANONYMOUS,
michael@0:     JS_PropertyStub, JS_DeletePropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
michael@0:     JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub,
michael@0: };
michael@0: 
michael@0: /*
michael@0:  * When JSOP_CALLPROP or JSOP_CALLELEM does not find the method property of
michael@0:  * the base object, we search for the __noSuchMethod__ method in the base.
michael@0:  * If it exists, we store the method and the property's id into an object of
michael@0:  * NoSuchMethod class and store this object into the callee's stack slot.
michael@0:  * Later, Invoke will recognise such an object and transfer control to
michael@0:  * NoSuchMethod that invokes the method like:
michael@0:  *
michael@0:  *   this.__noSuchMethod__(id, args)
michael@0:  *
michael@0:  * where id is the name of the method that this invocation attempted to
michael@0:  * call by name, and args is an Array containing this invocation's actual
michael@0:  * parameters.
michael@0:  */
michael@0: bool
michael@0: js::OnUnknownMethod(JSContext *cx, HandleObject obj, Value idval_, MutableHandleValue vp)
michael@0: {
michael@0:     RootedValue idval(cx, idval_);
michael@0: 
michael@0:     RootedValue value(cx);
michael@0:     if (!JSObject::getProperty(cx, obj, obj, cx->names().noSuchMethod, &value))
michael@0:         return false;
michael@0: 
michael@0:     if (value.isObject()) {
michael@0:         JSObject *obj = NewObjectWithClassProto(cx, &js_NoSuchMethodClass, nullptr, nullptr);
michael@0:         if (!obj)
michael@0:             return false;
michael@0: 
michael@0:         obj->setSlot(JSSLOT_FOUND_FUNCTION, value);
michael@0:         obj->setSlot(JSSLOT_SAVED_ID, idval);
michael@0:         vp.setObject(*obj);
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static bool
michael@0: NoSuchMethod(JSContext *cx, unsigned argc, Value *vp)
michael@0: {
michael@0:     InvokeArgs args(cx);
michael@0:     if (!args.init(2))
michael@0:         return false;
michael@0: 
michael@0:     JS_ASSERT(vp[0].isObject());
michael@0:     JS_ASSERT(vp[1].isObject());
michael@0:     JSObject *obj = &vp[0].toObject();
michael@0:     JS_ASSERT(obj->getClass() == &js_NoSuchMethodClass);
michael@0: 
michael@0:     args.setCallee(obj->getReservedSlot(JSSLOT_FOUND_FUNCTION));
michael@0:     args.setThis(vp[1]);
michael@0:     args[0].set(obj->getReservedSlot(JSSLOT_SAVED_ID));
michael@0:     JSObject *argsobj = NewDenseCopiedArray(cx, argc, vp + 2);
michael@0:     if (!argsobj)
michael@0:         return false;
michael@0:     args[1].setObject(*argsobj);
michael@0:     bool ok = Invoke(cx, args);
michael@0:     vp[0] = args.rval();
michael@0:     return ok;
michael@0: }
michael@0: 
michael@0: #endif /* JS_HAS_NO_SUCH_METHOD */
michael@0: 
michael@0: static inline bool
michael@0: GetPropertyOperation(JSContext *cx, InterpreterFrame *fp, HandleScript script, jsbytecode *pc,
michael@0:                      MutableHandleValue lval, MutableHandleValue vp)
michael@0: {
michael@0:     JSOp op = JSOp(*pc);
michael@0: 
michael@0:     if (op == JSOP_LENGTH) {
michael@0:         if (IsOptimizedArguments(fp, lval.address())) {
michael@0:             vp.setInt32(fp->numActualArgs());
michael@0:             return true;
michael@0:         }
michael@0: 
michael@0:         if (GetLengthProperty(lval, vp))
michael@0:             return true;
michael@0:     }
michael@0: 
michael@0:     Rooted<GlobalObject*> global(cx, &fp->global());
michael@0:     RootedId id(cx, NameToId(script->getName(pc)));
michael@0:     RootedObject obj(cx);
michael@0: 
michael@0:     /* Optimize (.1).toString(). */
michael@0:     if (lval.isNumber() && id == NameToId(cx->names().toString)) {
michael@0:         JSObject *proto = GlobalObject::getOrCreateNumberPrototype(cx, global);
michael@0:         if (!proto)
michael@0:             return false;
michael@0:         if (ClassMethodIsNative(cx, proto, &NumberObject::class_, id, js_num_toString))
michael@0:             obj = proto;
michael@0:     }
michael@0: 
michael@0:     if (!obj) {
michael@0:         obj = ToObjectFromStack(cx, lval);
michael@0:         if (!obj)
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     bool wasObject = lval.isObject();
michael@0: 
michael@0:     if (!JSObject::getGeneric(cx, obj, obj, id, vp))
michael@0:         return false;
michael@0: 
michael@0: #if JS_HAS_NO_SUCH_METHOD
michael@0:     if (op == JSOP_CALLPROP &&
michael@0:         MOZ_UNLIKELY(vp.isUndefined()) &&
michael@0:         wasObject)
michael@0:     {
michael@0:         if (!OnUnknownMethod(cx, obj, IdToValue(id), vp))
michael@0:             return false;
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static inline bool
michael@0: NameOperation(JSContext *cx, InterpreterFrame *fp, jsbytecode *pc, MutableHandleValue vp)
michael@0: {
michael@0:     JSObject *obj = fp->scopeChain();
michael@0:     PropertyName *name = fp->script()->getName(pc);
michael@0: 
michael@0:     /*
michael@0:      * Skip along the scope chain to the enclosing global object. This is
michael@0:      * used for GNAME opcodes where the bytecode emitter has determined a
michael@0:      * name access must be on the global. It also insulates us from bugs
michael@0:      * in the emitter: type inference will assume that GNAME opcodes are
michael@0:      * accessing the global object, and the inferred behavior should match
michael@0:      * the actual behavior even if the id could be found on the scope chain
michael@0:      * before the global object.
michael@0:      */
michael@0:     if (IsGlobalOp(JSOp(*pc)))
michael@0:         obj = &obj->global();
michael@0: 
michael@0:     Shape *shape = nullptr;
michael@0:     JSObject *scope = nullptr, *pobj = nullptr;
michael@0:     if (LookupNameNoGC(cx, name, obj, &scope, &pobj, &shape)) {
michael@0:         if (FetchNameNoGC(pobj, shape, vp))
michael@0:             return true;
michael@0:     }
michael@0: 
michael@0:     RootedObject objRoot(cx, obj), scopeRoot(cx), pobjRoot(cx);
michael@0:     RootedPropertyName nameRoot(cx, name);
michael@0:     RootedShape shapeRoot(cx);
michael@0: 
michael@0:     if (!LookupName(cx, nameRoot, objRoot, &scopeRoot, &pobjRoot, &shapeRoot))
michael@0:         return false;
michael@0: 
michael@0:     /* Kludge to allow (typeof foo == "undefined") tests. */
michael@0:     JSOp op2 = JSOp(pc[JSOP_NAME_LENGTH]);
michael@0:     if (op2 == JSOP_TYPEOF)
michael@0:         return FetchName<true>(cx, scopeRoot, pobjRoot, nameRoot, shapeRoot, vp);
michael@0:     return FetchName<false>(cx, scopeRoot, pobjRoot, nameRoot, shapeRoot, vp);
michael@0: }
michael@0: 
michael@0: static inline bool
michael@0: SetPropertyOperation(JSContext *cx, HandleScript script, jsbytecode *pc, HandleValue lval,
michael@0:                      HandleValue rval)
michael@0: {
michael@0:     JS_ASSERT(*pc == JSOP_SETPROP);
michael@0: 
michael@0:     RootedObject obj(cx, ToObjectFromStack(cx, lval));
michael@0:     if (!obj)
michael@0:         return false;
michael@0: 
michael@0:     RootedValue rref(cx, rval);
michael@0: 
michael@0:     RootedId id(cx, NameToId(script->getName(pc)));
michael@0:     if (MOZ_LIKELY(!obj->getOps()->setProperty)) {
michael@0:         if (!baseops::SetPropertyHelper<SequentialExecution>(cx, obj, obj, id, baseops::Qualified,
michael@0:                                                              &rref, script->strict()))
michael@0:         {
michael@0:             return false;
michael@0:         }
michael@0:     } else {
michael@0:         if (!JSObject::setGeneric(cx, obj, obj, id, &rref, script->strict()))
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::ReportIsNotFunction(JSContext *cx, HandleValue v, int numToSkip, MaybeConstruct construct)
michael@0: {
michael@0:     unsigned error = construct ? JSMSG_NOT_CONSTRUCTOR : JSMSG_NOT_FUNCTION;
michael@0:     int spIndex = numToSkip >= 0 ? -(numToSkip + 1) : JSDVG_SEARCH_STACK;
michael@0: 
michael@0:     js_ReportValueError3(cx, error, spIndex, v, NullPtr(), nullptr, nullptr);
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: JSObject *
michael@0: js::ValueToCallable(JSContext *cx, HandleValue v, int numToSkip, MaybeConstruct construct)
michael@0: {
michael@0:     if (v.isObject()) {
michael@0:         JSObject *callable = &v.toObject();
michael@0:         if (callable->isCallable())
michael@0:             return callable;
michael@0:     }
michael@0: 
michael@0:     ReportIsNotFunction(cx, v, numToSkip, construct);
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: static MOZ_NEVER_INLINE bool
michael@0: Interpret(JSContext *cx, RunState &state);
michael@0: 
michael@0: InterpreterFrame *
michael@0: InvokeState::pushInterpreterFrame(JSContext *cx)
michael@0: {
michael@0:     return cx->runtime()->interpreterStack().pushInvokeFrame(cx, args_, initial_);
michael@0: }
michael@0: 
michael@0: InterpreterFrame *
michael@0: ExecuteState::pushInterpreterFrame(JSContext *cx)
michael@0: {
michael@0:     return cx->runtime()->interpreterStack().pushExecuteFrame(cx, script_, thisv_, scopeChain_,
michael@0:                                                               type_, evalInFrame_);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::RunScript(JSContext *cx, RunState &state)
michael@0: {
michael@0:     JS_CHECK_RECURSION(cx, return false);
michael@0: 
michael@0:     SPSEntryMarker marker(cx->runtime());
michael@0: 
michael@0:     state.script()->ensureNonLazyCanonicalFunction(cx);
michael@0: 
michael@0: #ifdef JS_ION
michael@0:     if (jit::IsIonEnabled(cx)) {
michael@0:         jit::MethodStatus status = jit::CanEnter(cx, state);
michael@0:         if (status == jit::Method_Error)
michael@0:             return false;
michael@0:         if (status == jit::Method_Compiled) {
michael@0:             jit::IonExecStatus status = jit::IonCannon(cx, state);
michael@0:             return !IsErrorStatus(status);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (jit::IsBaselineEnabled(cx)) {
michael@0:         jit::MethodStatus status = jit::CanEnterBaselineMethod(cx, state);
michael@0:         if (status == jit::Method_Error)
michael@0:             return false;
michael@0:         if (status == jit::Method_Compiled) {
michael@0:             jit::IonExecStatus status = jit::EnterBaselineMethod(cx, state);
michael@0:             return !IsErrorStatus(status);
michael@0:         }
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     if (state.isInvoke()) {
michael@0:         InvokeState &invoke = *state.asInvoke();
michael@0:         TypeMonitorCall(cx, invoke.args(), invoke.constructing());
michael@0:     }
michael@0: 
michael@0:     return Interpret(cx, state);
michael@0: }
michael@0: 
michael@0: struct AutoGCIfNeeded
michael@0: {
michael@0:     JSContext *cx_;
michael@0:     AutoGCIfNeeded(JSContext *cx) : cx_(cx) {}
michael@0:     ~AutoGCIfNeeded() { js::gc::GCIfNeeded(cx_); }
michael@0: };
michael@0: 
michael@0: /*
michael@0:  * Find a function reference and its 'this' value implicit first parameter
michael@0:  * under argc arguments on cx's stack, and call the function.  Push missing
michael@0:  * required arguments, allocate declared local variables, and pop everything
michael@0:  * when done.  Then push the return value.
michael@0:  */
michael@0: bool
michael@0: js::Invoke(JSContext *cx, CallArgs args, MaybeConstruct construct)
michael@0: {
michael@0:     JS_ASSERT(args.length() <= ARGS_LENGTH_MAX);
michael@0:     JS_ASSERT(!cx->compartment()->activeAnalysis);
michael@0: 
michael@0:     /* We should never enter a new script while cx->iterValue is live. */
michael@0:     JS_ASSERT(cx->iterValue.isMagic(JS_NO_ITER_VALUE));
michael@0: 
michael@0:     /* Perform GC if necessary on exit from the function. */
michael@0:     AutoGCIfNeeded gcIfNeeded(cx);
michael@0: 
michael@0:     /* MaybeConstruct is a subset of InitialFrameFlags */
michael@0:     InitialFrameFlags initial = (InitialFrameFlags) construct;
michael@0: 
michael@0:     if (args.calleev().isPrimitive())
michael@0:         return ReportIsNotFunction(cx, args.calleev(), args.length() + 1, construct);
michael@0: 
michael@0:     JSObject &callee = args.callee();
michael@0:     const Class *clasp = callee.getClass();
michael@0: 
michael@0:     /* Invoke non-functions. */
michael@0:     if (MOZ_UNLIKELY(clasp != &JSFunction::class_)) {
michael@0: #if JS_HAS_NO_SUCH_METHOD
michael@0:         if (MOZ_UNLIKELY(clasp == &js_NoSuchMethodClass))
michael@0:             return NoSuchMethod(cx, args.length(), args.base());
michael@0: #endif
michael@0:         JS_ASSERT_IF(construct, !clasp->construct);
michael@0:         if (!clasp->call)
michael@0:             return ReportIsNotFunction(cx, args.calleev(), args.length() + 1, construct);
michael@0:         return CallJSNative(cx, clasp->call, args);
michael@0:     }
michael@0: 
michael@0:     /* Invoke native functions. */
michael@0:     JSFunction *fun = &callee.as<JSFunction>();
michael@0:     JS_ASSERT_IF(construct, !fun->isNativeConstructor());
michael@0:     if (fun->isNative())
michael@0:         return CallJSNative(cx, fun->native(), args);
michael@0: 
michael@0:     if (!fun->getOrCreateScript(cx))
michael@0:         return false;
michael@0: 
michael@0:     /* Run function until JSOP_RETRVAL, JSOP_RETURN or error. */
michael@0:     InvokeState state(cx, args, initial);
michael@0: 
michael@0:     // Check to see if useNewType flag should be set for this frame.
michael@0:     if (construct) {
michael@0:         FrameIter iter(cx);
michael@0:         if (!iter.done() && iter.hasScript()) {
michael@0:             JSScript *script = iter.script();
michael@0:             jsbytecode *pc = iter.pc();
michael@0:             if (UseNewType(cx, script, pc))
michael@0:                 state.setUseNewType();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     bool ok = RunScript(cx, state);
michael@0: 
michael@0:     JS_ASSERT_IF(ok && construct, !args.rval().isPrimitive());
michael@0:     return ok;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::Invoke(JSContext *cx, const Value &thisv, const Value &fval, unsigned argc, const Value *argv,
michael@0:            MutableHandleValue rval)
michael@0: {
michael@0:     InvokeArgs args(cx);
michael@0:     if (!args.init(argc))
michael@0:         return false;
michael@0: 
michael@0:     args.setCallee(fval);
michael@0:     args.setThis(thisv);
michael@0:     PodCopy(args.array(), argv, argc);
michael@0: 
michael@0:     if (args.thisv().isObject()) {
michael@0:         /*
michael@0:          * We must call the thisObject hook in case we are not called from the
michael@0:          * interpreter, where a prior bytecode has computed an appropriate
michael@0:          * |this| already.  But don't do that if fval is a DOM function.
michael@0:          */
michael@0:         if (!fval.isObject() || !fval.toObject().is<JSFunction>() ||
michael@0:             !fval.toObject().as<JSFunction>().isNative() ||
michael@0:             !fval.toObject().as<JSFunction>().jitInfo() ||
michael@0:             fval.toObject().as<JSFunction>().jitInfo()->needsOuterizedThisObject())
michael@0:         {
michael@0:             RootedObject thisObj(cx, &args.thisv().toObject());
michael@0:             JSObject *thisp = JSObject::thisObject(cx, thisObj);
michael@0:             if (!thisp)
michael@0:                 return false;
michael@0:             args.setThis(ObjectValue(*thisp));
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (!Invoke(cx, args))
michael@0:         return false;
michael@0: 
michael@0:     rval.set(args.rval());
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InvokeConstructor(JSContext *cx, CallArgs args)
michael@0: {
michael@0:     JS_ASSERT(!JSFunction::class_.construct);
michael@0: 
michael@0:     args.setThis(MagicValue(JS_IS_CONSTRUCTING));
michael@0: 
michael@0:     if (!args.calleev().isObject())
michael@0:         return ReportIsNotFunction(cx, args.calleev(), args.length() + 1, CONSTRUCT);
michael@0: 
michael@0:     JSObject &callee = args.callee();
michael@0:     if (callee.is<JSFunction>()) {
michael@0:         RootedFunction fun(cx, &callee.as<JSFunction>());
michael@0: 
michael@0:         if (fun->isNativeConstructor()) {
michael@0:             bool ok = CallJSNativeConstructor(cx, fun->native(), args);
michael@0:             return ok;
michael@0:         }
michael@0: 
michael@0:         if (!fun->isInterpretedConstructor()) {
michael@0:             RootedValue orig(cx, ObjectValue(*fun->originalFunction()));
michael@0:             return ReportIsNotFunction(cx, orig, args.length() + 1, CONSTRUCT);
michael@0:         }
michael@0:         if (!Invoke(cx, args, CONSTRUCT))
michael@0:             return false;
michael@0: 
michael@0:         JS_ASSERT(args.rval().isObject());
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     const Class *clasp = callee.getClass();
michael@0:     if (!clasp->construct)
michael@0:         return ReportIsNotFunction(cx, args.calleev(), args.length() + 1, CONSTRUCT);
michael@0: 
michael@0:     return CallJSNativeConstructor(cx, clasp->construct, args);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InvokeConstructor(JSContext *cx, Value fval, unsigned argc, Value *argv, Value *rval)
michael@0: {
michael@0:     InvokeArgs args(cx);
michael@0:     if (!args.init(argc))
michael@0:         return false;
michael@0: 
michael@0:     args.setCallee(fval);
michael@0:     args.setThis(MagicValue(JS_THIS_POISON));
michael@0:     PodCopy(args.array(), argv, argc);
michael@0: 
michael@0:     if (!InvokeConstructor(cx, args))
michael@0:         return false;
michael@0: 
michael@0:     *rval = args.rval();
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InvokeGetterOrSetter(JSContext *cx, JSObject *obj, Value fval, unsigned argc,
michael@0:                          Value *argv, MutableHandleValue rval)
michael@0: {
michael@0:     /*
michael@0:      * Invoke could result in another try to get or set the same id again, see
michael@0:      * bug 355497.
michael@0:      */
michael@0:     JS_CHECK_RECURSION(cx, return false);
michael@0: 
michael@0:     return Invoke(cx, ObjectValue(*obj), fval, argc, argv, rval);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::ExecuteKernel(JSContext *cx, HandleScript script, JSObject &scopeChainArg, const Value &thisv,
michael@0:                   ExecuteType type, AbstractFramePtr evalInFrame, Value *result)
michael@0: {
michael@0:     JS_ASSERT_IF(evalInFrame, type == EXECUTE_DEBUG);
michael@0:     JS_ASSERT_IF(type == EXECUTE_GLOBAL, !scopeChainArg.is<ScopeObject>());
michael@0: #ifdef DEBUG
michael@0:     if (thisv.isObject()) {
michael@0:         RootedObject thisObj(cx, &thisv.toObject());
michael@0:         AutoSuppressGC nogc(cx);
michael@0:         JS_ASSERT(GetOuterObject(cx, thisObj) == thisObj);
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     if (script->isEmpty()) {
michael@0:         if (result)
michael@0:             result->setUndefined();
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     TypeScript::SetThis(cx, script, thisv);
michael@0: 
michael@0:     probes::StartExecution(script);
michael@0:     ExecuteState state(cx, script, thisv, scopeChainArg, type, evalInFrame, result);
michael@0:     bool ok = RunScript(cx, state);
michael@0:     probes::StopExecution(script);
michael@0: 
michael@0:     return ok;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::Execute(JSContext *cx, HandleScript script, JSObject &scopeChainArg, Value *rval)
michael@0: {
michael@0:     /* The scope chain could be anything, so innerize just in case. */
michael@0:     RootedObject scopeChain(cx, &scopeChainArg);
michael@0:     scopeChain = GetInnerObject(cx, scopeChain);
michael@0:     if (!scopeChain)
michael@0:         return false;
michael@0: 
michael@0:     /* Ensure the scope chain is all same-compartment and terminates in a global. */
michael@0: #ifdef DEBUG
michael@0:     JSObject *s = scopeChain;
michael@0:     do {
michael@0:         assertSameCompartment(cx, s);
michael@0:         JS_ASSERT_IF(!s->enclosingScope(), s->is<GlobalObject>());
michael@0:     } while ((s = s->enclosingScope()));
michael@0: #endif
michael@0: 
michael@0:     /* The VAROBJFIX option makes varObj == globalObj in global code. */
michael@0:     if (!cx->options().varObjFix()) {
michael@0:         if (!scopeChain->setVarObj(cx))
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     /* Use the scope chain as 'this', modulo outerization. */
michael@0:     JSObject *thisObj = JSObject::thisObject(cx, scopeChain);
michael@0:     if (!thisObj)
michael@0:         return false;
michael@0:     Value thisv = ObjectValue(*thisObj);
michael@0: 
michael@0:     return ExecuteKernel(cx, script, *scopeChain, thisv, EXECUTE_GLOBAL,
michael@0:                          NullFramePtr() /* evalInFrame */, rval);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::HasInstance(JSContext *cx, HandleObject obj, HandleValue v, bool *bp)
michael@0: {
michael@0:     const Class *clasp = obj->getClass();
michael@0:     RootedValue local(cx, v);
michael@0:     if (clasp->hasInstance)
michael@0:         return clasp->hasInstance(cx, obj, &local, bp);
michael@0: 
michael@0:     RootedValue val(cx, ObjectValue(*obj));
michael@0:     js_ReportValueError(cx, JSMSG_BAD_INSTANCEOF_RHS,
michael@0:                         JSDVG_SEARCH_STACK, val, NullPtr());
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::LooselyEqual(JSContext *cx, const Value &lval, const Value &rval, bool *result)
michael@0: {
michael@0:     if (SameType(lval, rval)) {
michael@0:         if (lval.isString()) {
michael@0:             JSString *l = lval.toString();
michael@0:             JSString *r = rval.toString();
michael@0:             return EqualStrings(cx, l, r, result);
michael@0:         }
michael@0: 
michael@0:         if (lval.isDouble()) {
michael@0:             double l = lval.toDouble(), r = rval.toDouble();
michael@0:             *result = (l == r);
michael@0:             return true;
michael@0:         }
michael@0: 
michael@0:         if (lval.isObject()) {
michael@0:             JSObject *l = &lval.toObject();
michael@0:             JSObject *r = &rval.toObject();
michael@0:             *result = l == r;
michael@0:             return true;
michael@0:         }
michael@0: 
michael@0:         *result = lval.payloadAsRawUint32() == rval.payloadAsRawUint32();
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     if (lval.isNullOrUndefined()) {
michael@0:         *result = rval.isNullOrUndefined() ||
michael@0:                   (rval.isObject() && EmulatesUndefined(&rval.toObject()));
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     if (rval.isNullOrUndefined()) {
michael@0:         *result = (lval.isObject() && EmulatesUndefined(&lval.toObject()));
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     RootedValue lvalue(cx, lval);
michael@0:     RootedValue rvalue(cx, rval);
michael@0: 
michael@0:     if (!ToPrimitive(cx, &lvalue))
michael@0:         return false;
michael@0:     if (!ToPrimitive(cx, &rvalue))
michael@0:         return false;
michael@0: 
michael@0:     if (lvalue.get().isString() && rvalue.get().isString()) {
michael@0:         JSString *l = lvalue.get().toString();
michael@0:         JSString *r = rvalue.get().toString();
michael@0:         return EqualStrings(cx, l, r, result);
michael@0:     }
michael@0: 
michael@0:     double l, r;
michael@0:     if (!ToNumber(cx, lvalue, &l) || !ToNumber(cx, rvalue, &r))
michael@0:         return false;
michael@0:     *result = (l == r);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::StrictlyEqual(JSContext *cx, const Value &lref, const Value &rref, bool *equal)
michael@0: {
michael@0:     Value lval = lref, rval = rref;
michael@0:     if (SameType(lval, rval)) {
michael@0:         if (lval.isString())
michael@0:             return EqualStrings(cx, lval.toString(), rval.toString(), equal);
michael@0:         if (lval.isDouble()) {
michael@0:             *equal = (lval.toDouble() == rval.toDouble());
michael@0:             return true;
michael@0:         }
michael@0:         if (lval.isObject()) {
michael@0:             *equal = lval.toObject() == rval.toObject();
michael@0:             return true;
michael@0:         }
michael@0:         if (lval.isUndefined()) {
michael@0:             *equal = true;
michael@0:             return true;
michael@0:         }
michael@0:         *equal = lval.payloadAsRawUint32() == rval.payloadAsRawUint32();
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     if (lval.isDouble() && rval.isInt32()) {
michael@0:         double ld = lval.toDouble();
michael@0:         double rd = rval.toInt32();
michael@0:         *equal = (ld == rd);
michael@0:         return true;
michael@0:     }
michael@0:     if (lval.isInt32() && rval.isDouble()) {
michael@0:         double ld = lval.toInt32();
michael@0:         double rd = rval.toDouble();
michael@0:         *equal = (ld == rd);
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     *equal = false;
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static inline bool
michael@0: IsNegativeZero(const Value &v)
michael@0: {
michael@0:     return v.isDouble() && mozilla::IsNegativeZero(v.toDouble());
michael@0: }
michael@0: 
michael@0: static inline bool
michael@0: IsNaN(const Value &v)
michael@0: {
michael@0:     return v.isDouble() && mozilla::IsNaN(v.toDouble());
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::SameValue(JSContext *cx, const Value &v1, const Value &v2, bool *same)
michael@0: {
michael@0:     if (IsNegativeZero(v1)) {
michael@0:         *same = IsNegativeZero(v2);
michael@0:         return true;
michael@0:     }
michael@0:     if (IsNegativeZero(v2)) {
michael@0:         *same = false;
michael@0:         return true;
michael@0:     }
michael@0:     if (IsNaN(v1) && IsNaN(v2)) {
michael@0:         *same = true;
michael@0:         return true;
michael@0:     }
michael@0:     return StrictlyEqual(cx, v1, v2, same);
michael@0: }
michael@0: 
michael@0: JSType
michael@0: js::TypeOfObject(JSObject *obj)
michael@0: {
michael@0:     if (EmulatesUndefined(obj))
michael@0:         return JSTYPE_VOID;
michael@0:     if (obj->isCallable())
michael@0:         return JSTYPE_FUNCTION;
michael@0:     return JSTYPE_OBJECT;
michael@0: }
michael@0: 
michael@0: JSType
michael@0: js::TypeOfValue(const Value &v)
michael@0: {
michael@0:     if (v.isNumber())
michael@0:         return JSTYPE_NUMBER;
michael@0:     if (v.isString())
michael@0:         return JSTYPE_STRING;
michael@0:     if (v.isNull())
michael@0:         return JSTYPE_OBJECT;
michael@0:     if (v.isUndefined())
michael@0:         return JSTYPE_VOID;
michael@0:     if (v.isObject())
michael@0:         return TypeOfObject(&v.toObject());
michael@0:     JS_ASSERT(v.isBoolean());
michael@0:     return JSTYPE_BOOLEAN;
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * Enter the new with scope using an object at sp[-1] and associate the depth
michael@0:  * of the with block with sp + stackIndex.
michael@0:  */
michael@0: bool
michael@0: js::EnterWithOperation(JSContext *cx, AbstractFramePtr frame, HandleValue val,
michael@0:                        HandleObject staticWith)
michael@0: {
michael@0:     JS_ASSERT(staticWith->is<StaticWithObject>());
michael@0:     RootedObject obj(cx);
michael@0:     if (val.isObject()) {
michael@0:         obj = &val.toObject();
michael@0:     } else {
michael@0:         obj = ToObject(cx, val);
michael@0:         if (!obj)
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     RootedObject scopeChain(cx, frame.scopeChain());
michael@0:     DynamicWithObject *withobj = DynamicWithObject::create(cx, obj, scopeChain, staticWith);
michael@0:     if (!withobj)
michael@0:         return false;
michael@0: 
michael@0:     frame.pushOnScopeChain(*withobj);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: // Unwind scope chain and iterator to match the static scope corresponding to
michael@0: // the given bytecode position.
michael@0: void
michael@0: js::UnwindScope(JSContext *cx, ScopeIter &si, jsbytecode *pc)
michael@0: {
michael@0:     if (si.done())
michael@0:         return;
michael@0: 
michael@0:     Rooted<NestedScopeObject *> staticScope(cx, si.frame().script()->getStaticScope(pc));
michael@0: 
michael@0:     for (; si.staticScope() != staticScope; ++si) {
michael@0:         switch (si.type()) {
michael@0:           case ScopeIter::Block:
michael@0:             if (cx->compartment()->debugMode())
michael@0:                 DebugScopes::onPopBlock(cx, si);
michael@0:             if (si.staticBlock().needsClone())
michael@0:                 si.frame().popBlock(cx);
michael@0:             break;
michael@0:           case ScopeIter::With:
michael@0:             si.frame().popWith(cx);
michael@0:             break;
michael@0:           case ScopeIter::Call:
michael@0:           case ScopeIter::StrictEvalScope:
michael@0:             break;
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: static void
michael@0: ForcedReturn(JSContext *cx, ScopeIter &si, InterpreterRegs &regs)
michael@0: {
michael@0:     UnwindScope(cx, si, regs.fp()->script()->main());
michael@0:     regs.setToEndOfScript();
michael@0: }
michael@0: 
michael@0: static void
michael@0: ForcedReturn(JSContext *cx, InterpreterRegs &regs)
michael@0: {
michael@0:     ScopeIter si(regs.fp(), regs.pc, cx);
michael@0:     ForcedReturn(cx, si, regs);
michael@0: }
michael@0: 
michael@0: void
michael@0: js::UnwindForUncatchableException(JSContext *cx, const InterpreterRegs &regs)
michael@0: {
michael@0:     /* c.f. the regular (catchable) TryNoteIter loop in HandleError. */
michael@0:     for (TryNoteIter tni(cx, regs); !tni.done(); ++tni) {
michael@0:         JSTryNote *tn = *tni;
michael@0:         if (tn->kind == JSTRY_ITER) {
michael@0:             Value *sp = regs.spForStackDepth(tn->stackDepth);
michael@0:             UnwindIteratorForUncatchableException(cx, &sp[-1].toObject());
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: TryNoteIter::TryNoteIter(JSContext *cx, const InterpreterRegs &regs)
michael@0:   : regs(regs),
michael@0:     script(cx, regs.fp()->script()),
michael@0:     pcOffset(regs.pc - script->main())
michael@0: {
michael@0:     if (script->hasTrynotes()) {
michael@0:         tn = script->trynotes()->vector;
michael@0:         tnEnd = tn + script->trynotes()->length;
michael@0:     } else {
michael@0:         tn = tnEnd = nullptr;
michael@0:     }
michael@0:     settle();
michael@0: }
michael@0: 
michael@0: void
michael@0: TryNoteIter::operator++()
michael@0: {
michael@0:     ++tn;
michael@0:     settle();
michael@0: }
michael@0: 
michael@0: bool
michael@0: TryNoteIter::done() const
michael@0: {
michael@0:     return tn == tnEnd;
michael@0: }
michael@0: 
michael@0: void
michael@0: TryNoteIter::settle()
michael@0: {
michael@0:     for (; tn != tnEnd; ++tn) {
michael@0:         /* If pc is out of range, try the next one. */
michael@0:         if (pcOffset - tn->start >= tn->length)
michael@0:             continue;
michael@0: 
michael@0:         /*
michael@0:          * We have a note that covers the exception pc but we must check
michael@0:          * whether the interpreter has already executed the corresponding
michael@0:          * handler. This is possible when the executed bytecode implements
michael@0:          * break or return from inside a for-in loop.
michael@0:          *
michael@0:          * In this case the emitter generates additional [enditer] and [gosub]
michael@0:          * opcodes to close all outstanding iterators and execute the finally
michael@0:          * blocks. If such an [enditer] throws an exception, its pc can still
michael@0:          * be inside several nested for-in loops and try-finally statements
michael@0:          * even if we have already closed the corresponding iterators and
michael@0:          * invoked the finally blocks.
michael@0:          *
michael@0:          * To address this, we make [enditer] always decrease the stack even
michael@0:          * when its implementation throws an exception. Thus already executed
michael@0:          * [enditer] and [gosub] opcodes will have try notes with the stack
michael@0:          * depth exceeding the current one and this condition is what we use to
michael@0:          * filter them out.
michael@0:          */
michael@0:         if (tn->stackDepth <= regs.stackDepth())
michael@0:             break;
michael@0:     }
michael@0: }
michael@0: 
michael@0: enum HandleErrorContinuation
michael@0: {
michael@0:     SuccessfulReturnContinuation,
michael@0:     ErrorReturnContinuation,
michael@0:     CatchContinuation,
michael@0:     FinallyContinuation
michael@0: };
michael@0: 
michael@0: static HandleErrorContinuation
michael@0: HandleError(JSContext *cx, InterpreterRegs &regs)
michael@0: {
michael@0:     JS_ASSERT(regs.fp()->script()->containsPC(regs.pc));
michael@0: 
michael@0:     ScopeIter si(regs.fp(), regs.pc, cx);
michael@0:     bool ok = false;
michael@0: 
michael@0:   again:
michael@0:     if (cx->isExceptionPending()) {
michael@0:         /* Call debugger throw hooks. */
michael@0:         if (MOZ_UNLIKELY(cx->compartment()->debugMode())) {
michael@0:             JSTrapStatus status = DebugExceptionUnwind(cx, regs.fp(), regs.pc);
michael@0:             switch (status) {
michael@0:               case JSTRAP_ERROR:
michael@0:                 goto again;
michael@0: 
michael@0:               case JSTRAP_CONTINUE:
michael@0:               case JSTRAP_THROW:
michael@0:                 break;
michael@0: 
michael@0:               case JSTRAP_RETURN:
michael@0:                 ForcedReturn(cx, si, regs);
michael@0:                 return SuccessfulReturnContinuation;
michael@0: 
michael@0:               default:
michael@0:                 MOZ_ASSUME_UNREACHABLE("Invalid trap status");
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         RootedValue exception(cx);
michael@0:         for (TryNoteIter tni(cx, regs); !tni.done(); ++tni) {
michael@0:             JSTryNote *tn = *tni;
michael@0: 
michael@0:             UnwindScope(cx, si, regs.fp()->script()->main() + tn->start);
michael@0: 
michael@0:             /*
michael@0:              * Set pc to the first bytecode after the the try note to point
michael@0:              * to the beginning of catch or finally or to [enditer] closing
michael@0:              * the for-in loop.
michael@0:              */
michael@0:             regs.pc = regs.fp()->script()->main() + tn->start + tn->length;
michael@0:             regs.sp = regs.spForStackDepth(tn->stackDepth);
michael@0: 
michael@0:             switch (tn->kind) {
michael@0:               case JSTRY_CATCH:
michael@0:                 /* Catch cannot intercept the closing of a generator. */
michael@0:                 if (!cx->getPendingException(&exception))
michael@0:                     return ErrorReturnContinuation;
michael@0:                 if (exception.isMagic(JS_GENERATOR_CLOSING))
michael@0:                     break;
michael@0:                 return CatchContinuation;
michael@0: 
michael@0:               case JSTRY_FINALLY:
michael@0:                 return FinallyContinuation;
michael@0: 
michael@0:               case JSTRY_ITER: {
michael@0:                 /* This is similar to JSOP_ENDITER in the interpreter loop. */
michael@0:                 JS_ASSERT(JSOp(*regs.pc) == JSOP_ENDITER);
michael@0:                 RootedObject obj(cx, &regs.sp[-1].toObject());
michael@0:                 bool ok = UnwindIteratorForException(cx, obj);
michael@0:                 regs.sp -= 1;
michael@0:                 if (!ok)
michael@0:                     goto again;
michael@0:                 break;
michael@0:               }
michael@0: 
michael@0:               case JSTRY_LOOP:
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         /*
michael@0:          * Propagate the exception or error to the caller unless the exception
michael@0:          * is an asynchronous return from a generator.
michael@0:          */
michael@0:         if (cx->isExceptionPending()) {
michael@0:             RootedValue exception(cx);
michael@0:             if (!cx->getPendingException(&exception))
michael@0:                 return ErrorReturnContinuation;
michael@0: 
michael@0:             if (exception.isMagic(JS_GENERATOR_CLOSING)) {
michael@0:                 cx->clearPendingException();
michael@0:                 ok = true;
michael@0:                 regs.fp()->clearReturnValue();
michael@0:             }
michael@0:         }
michael@0:     } else {
michael@0:         UnwindForUncatchableException(cx, regs);
michael@0:     }
michael@0: 
michael@0:     ForcedReturn(cx, si, regs);
michael@0:     return ok ? SuccessfulReturnContinuation : ErrorReturnContinuation;
michael@0: }
michael@0: 
michael@0: #define REGS                     (activation.regs())
michael@0: #define PUSH_COPY(v)             do { *REGS.sp++ = (v); assertSameCompartmentDebugOnly(cx, REGS.sp[-1]); } while (0)
michael@0: #define PUSH_COPY_SKIP_CHECK(v)  *REGS.sp++ = (v)
michael@0: #define PUSH_NULL()              REGS.sp++->setNull()
michael@0: #define PUSH_UNDEFINED()         REGS.sp++->setUndefined()
michael@0: #define PUSH_BOOLEAN(b)          REGS.sp++->setBoolean(b)
michael@0: #define PUSH_DOUBLE(d)           REGS.sp++->setDouble(d)
michael@0: #define PUSH_INT32(i)            REGS.sp++->setInt32(i)
michael@0: #define PUSH_STRING(s)           do { REGS.sp++->setString(s); assertSameCompartmentDebugOnly(cx, REGS.sp[-1]); } while (0)
michael@0: #define PUSH_OBJECT(obj)         do { REGS.sp++->setObject(obj); assertSameCompartmentDebugOnly(cx, REGS.sp[-1]); } while (0)
michael@0: #define PUSH_OBJECT_OR_NULL(obj) do { REGS.sp++->setObjectOrNull(obj); assertSameCompartmentDebugOnly(cx, REGS.sp[-1]); } while (0)
michael@0: #define PUSH_HOLE()              REGS.sp++->setMagic(JS_ELEMENTS_HOLE)
michael@0: #define POP_COPY_TO(v)           (v) = *--REGS.sp
michael@0: #define POP_RETURN_VALUE()       REGS.fp()->setReturnValue(*--REGS.sp)
michael@0: 
michael@0: #define FETCH_OBJECT(cx, n, obj)                                              \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         HandleValue val = REGS.stackHandleAt(n);                              \
michael@0:         obj = ToObjectFromStack((cx), (val));                                 \
michael@0:         if (!obj)                                                             \
michael@0:             goto error;                                                       \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: /*
michael@0:  * Same for JSOP_SETNAME and JSOP_SETPROP, which differ only slightly but
michael@0:  * remain distinct for the decompiler.
michael@0:  */
michael@0: JS_STATIC_ASSERT(JSOP_SETNAME_LENGTH == JSOP_SETPROP_LENGTH);
michael@0: 
michael@0: /* See TRY_BRANCH_AFTER_COND. */
michael@0: JS_STATIC_ASSERT(JSOP_IFNE_LENGTH == JSOP_IFEQ_LENGTH);
michael@0: JS_STATIC_ASSERT(JSOP_IFNE == JSOP_IFEQ + 1);
michael@0: 
michael@0: /*
michael@0:  * Inline fast paths for iteration. js_IteratorMore and js_IteratorNext handle
michael@0:  * all cases, but we inline the most frequently taken paths here.
michael@0:  */
michael@0: bool
michael@0: js::IteratorMore(JSContext *cx, JSObject *iterobj, bool *cond, MutableHandleValue rval)
michael@0: {
michael@0:     if (iterobj->is<PropertyIteratorObject>()) {
michael@0:         NativeIterator *ni = iterobj->as<PropertyIteratorObject>().getNativeIterator();
michael@0:         if (ni->isKeyIter()) {
michael@0:             *cond = (ni->props_cursor < ni->props_end);
michael@0:             return true;
michael@0:         }
michael@0:     }
michael@0:     Rooted<JSObject*> iobj(cx, iterobj);
michael@0:     if (!js_IteratorMore(cx, iobj, rval))
michael@0:         return false;
michael@0:     *cond = rval.isTrue();
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::IteratorNext(JSContext *cx, HandleObject iterobj, MutableHandleValue rval)
michael@0: {
michael@0:     if (iterobj->is<PropertyIteratorObject>()) {
michael@0:         NativeIterator *ni = iterobj->as<PropertyIteratorObject>().getNativeIterator();
michael@0:         if (ni->isKeyIter()) {
michael@0:             JS_ASSERT(ni->props_cursor < ni->props_end);
michael@0:             rval.setString(*ni->current());
michael@0:             ni->incCursor();
michael@0:             return true;
michael@0:         }
michael@0:     }
michael@0:     return js_IteratorNext(cx, iterobj, rval);
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * Compute the implicit |this| parameter for a call expression where the callee
michael@0:  * funval was resolved from an unqualified name reference to a property on obj
michael@0:  * (an object on the scope chain).
michael@0:  *
michael@0:  * We can avoid computing |this| eagerly and push the implicit callee-coerced
michael@0:  * |this| value, undefined, if any of these conditions hold:
michael@0:  *
michael@0:  * 1. The nominal |this|, obj, is a global object.
michael@0:  *
michael@0:  * 2. The nominal |this|, obj, has one of Block, Call, or DeclEnv class (this
michael@0:  *    is what IsCacheableNonGlobalScope tests). Such objects-as-scopes must be
michael@0:  *    censored with undefined.
michael@0:  *
michael@0:  * Otherwise, we bind |this| to obj->thisObject(). Only names inside |with|
michael@0:  * statements and embedding-specific scope objects fall into this category.
michael@0:  *
michael@0:  * If the callee is a strict mode function, then code implementing JSOP_THIS
michael@0:  * in the interpreter and JITs will leave undefined as |this|. If funval is a
michael@0:  * function not in strict mode, JSOP_THIS code replaces undefined with funval's
michael@0:  * global.
michael@0:  *
michael@0:  * We set *vp to undefined early to reduce code size and bias this code for the
michael@0:  * common and future-friendly cases.
michael@0:  */
michael@0: static inline bool
michael@0: ComputeImplicitThis(JSContext *cx, HandleObject obj, MutableHandleValue vp)
michael@0: {
michael@0:     vp.setUndefined();
michael@0: 
michael@0:     if (obj->is<GlobalObject>())
michael@0:         return true;
michael@0: 
michael@0:     if (IsCacheableNonGlobalScope(obj))
michael@0:         return true;
michael@0: 
michael@0:     JSObject *nobj = JSObject::thisObject(cx, obj);
michael@0:     if (!nobj)
michael@0:         return false;
michael@0: 
michael@0:     vp.setObject(*nobj);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static MOZ_ALWAYS_INLINE bool
michael@0: AddOperation(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     if (lhs.isInt32() && rhs.isInt32()) {
michael@0:         int32_t l = lhs.toInt32(), r = rhs.toInt32();
michael@0:         int32_t t;
michael@0:         if (MOZ_LIKELY(SafeAdd(l, r, &t))) {
michael@0:             res.setInt32(t);
michael@0:             return true;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (!ToPrimitive(cx, lhs))
michael@0:         return false;
michael@0:     if (!ToPrimitive(cx, rhs))
michael@0:         return false;
michael@0: 
michael@0:     bool lIsString, rIsString;
michael@0:     if ((lIsString = lhs.isString()) | (rIsString = rhs.isString())) {
michael@0:         JSString *lstr, *rstr;
michael@0:         if (lIsString) {
michael@0:             lstr = lhs.toString();
michael@0:         } else {
michael@0:             lstr = ToString<CanGC>(cx, lhs);
michael@0:             if (!lstr)
michael@0:                 return false;
michael@0:         }
michael@0:         if (rIsString) {
michael@0:             rstr = rhs.toString();
michael@0:         } else {
michael@0:             // Save/restore lstr in case of GC activity under ToString.
michael@0:             lhs.setString(lstr);
michael@0:             rstr = ToString<CanGC>(cx, rhs);
michael@0:             if (!rstr)
michael@0:                 return false;
michael@0:             lstr = lhs.toString();
michael@0:         }
michael@0:         JSString *str = ConcatStrings<NoGC>(cx, lstr, rstr);
michael@0:         if (!str) {
michael@0:             RootedString nlstr(cx, lstr), nrstr(cx, rstr);
michael@0:             str = ConcatStrings<CanGC>(cx, nlstr, nrstr);
michael@0:             if (!str)
michael@0:                 return false;
michael@0:         }
michael@0:         res.setString(str);
michael@0:     } else {
michael@0:         double l, r;
michael@0:         if (!ToNumber(cx, lhs, &l) || !ToNumber(cx, rhs, &r))
michael@0:             return false;
michael@0:         res.setNumber(l + r);
michael@0:     }
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static MOZ_ALWAYS_INLINE bool
michael@0: SubOperation(JSContext *cx, HandleValue lhs, HandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     double d1, d2;
michael@0:     if (!ToNumber(cx, lhs, &d1) || !ToNumber(cx, rhs, &d2))
michael@0:         return false;
michael@0:     res.setNumber(d1 - d2);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static MOZ_ALWAYS_INLINE bool
michael@0: MulOperation(JSContext *cx, HandleValue lhs, HandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     double d1, d2;
michael@0:     if (!ToNumber(cx, lhs, &d1) || !ToNumber(cx, rhs, &d2))
michael@0:         return false;
michael@0:     res.setNumber(d1 * d2);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static MOZ_ALWAYS_INLINE bool
michael@0: DivOperation(JSContext *cx, HandleValue lhs, HandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     double d1, d2;
michael@0:     if (!ToNumber(cx, lhs, &d1) || !ToNumber(cx, rhs, &d2))
michael@0:         return false;
michael@0:     res.setNumber(NumberDiv(d1, d2));
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static MOZ_ALWAYS_INLINE bool
michael@0: ModOperation(JSContext *cx, HandleValue lhs, HandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     int32_t l, r;
michael@0:     if (lhs.isInt32() && rhs.isInt32() &&
michael@0:         (l = lhs.toInt32()) >= 0 && (r = rhs.toInt32()) > 0) {
michael@0:         int32_t mod = l % r;
michael@0:         res.setInt32(mod);
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     double d1, d2;
michael@0:     if (!ToNumber(cx, lhs, &d1) || !ToNumber(cx, rhs, &d2))
michael@0:         return false;
michael@0: 
michael@0:     res.setNumber(NumberMod(d1, d2));
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static MOZ_ALWAYS_INLINE bool
michael@0: SetObjectElementOperation(JSContext *cx, Handle<JSObject*> obj, HandleId id, const Value &value,
michael@0:                           bool strict, JSScript *script = nullptr, jsbytecode *pc = nullptr)
michael@0: {
michael@0:     types::TypeScript::MonitorAssign(cx, obj, id);
michael@0: 
michael@0: #ifdef JS_ION
michael@0:     if (obj->isNative() && JSID_IS_INT(id)) {
michael@0:         uint32_t length = obj->getDenseInitializedLength();
michael@0:         int32_t i = JSID_TO_INT(id);
michael@0:         if ((uint32_t)i >= length) {
michael@0:             // Annotate script if provided with information (e.g. baseline)
michael@0:             if (script && script->hasBaselineScript() && *pc == JSOP_SETELEM)
michael@0:                 script->baselineScript()->noteArrayWriteHole(script->pcToOffset(pc));
michael@0:         }
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     if (obj->isNative() && !JSID_IS_INT(id) && !obj->setHadElementsAccess(cx))
michael@0:         return false;
michael@0: 
michael@0:     RootedValue tmp(cx, value);
michael@0:     return JSObject::setGeneric(cx, obj, obj, id, &tmp, strict);
michael@0: }
michael@0: 
michael@0: static MOZ_NEVER_INLINE bool
michael@0: Interpret(JSContext *cx, RunState &state)
michael@0: {
michael@0: /*
michael@0:  * Define macros for an interpreter loop. Opcode dispatch may be either by a
michael@0:  * switch statement or by indirect goto (aka a threaded interpreter), depending
michael@0:  * on compiler support.
michael@0:  *
michael@0:  * Threaded interpretation appears to be well-supported by GCC 3 and higher.
michael@0:  * IBM's C compiler when run with the right options (e.g., -qlanglvl=extended)
michael@0:  * also supports threading. Ditto the SunPro C compiler.
michael@0:  */
michael@0: #if (__GNUC__ >= 3 ||                                                         \
michael@0:      (__IBMC__ >= 700 && defined __IBM_COMPUTED_GOTO) ||                      \
michael@0:      __SUNPRO_C >= 0x570)
michael@0: // Non-standard but faster indirect-goto-based dispatch.
michael@0: # define INTERPRETER_LOOP()
michael@0: # define CASE(OP)                 label_##OP:
michael@0: # define DEFAULT()                label_default:
michael@0: # define DISPATCH_TO(OP)          goto *addresses[(OP)]
michael@0: 
michael@0: # define LABEL(X)                 (&&label_##X)
michael@0: 
michael@0:     // Use addresses instead of offsets to optimize for runtime speed over
michael@0:     // load-time relocation overhead.
michael@0:     static const void *const addresses[EnableInterruptsPseudoOpcode + 1] = {
michael@0: # define OPCODE_LABEL(op, ...)  LABEL(op),
michael@0:         FOR_EACH_OPCODE(OPCODE_LABEL)
michael@0: # undef OPCODE_LABEL
michael@0: # define TRAILING_LABEL(v)                                                    \
michael@0:     ((v) == EnableInterruptsPseudoOpcode                                      \
michael@0:      ? LABEL(EnableInterruptsPseudoOpcode)                                    \
michael@0:      : LABEL(default)),
michael@0:         FOR_EACH_TRAILING_UNUSED_OPCODE(TRAILING_LABEL)
michael@0: # undef TRAILING_LABEL
michael@0:     };
michael@0: #else
michael@0: // Portable switch-based dispatch.
michael@0: # define INTERPRETER_LOOP()       the_switch: switch (switchOp)
michael@0: # define CASE(OP)                 case OP:
michael@0: # define DEFAULT()                default:
michael@0: # define DISPATCH_TO(OP)                                                      \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         switchOp = (OP);                                                      \
michael@0:         goto the_switch;                                                      \
michael@0:     JS_END_MACRO
michael@0: 
michael@0:     // This variable is effectively a parameter to the_switch.
michael@0:     jsbytecode switchOp;
michael@0: #endif
michael@0: 
michael@0:     /*
michael@0:      * Increment REGS.pc by N, load the opcode at that position,
michael@0:      * and jump to the code to execute it.
michael@0:      *
michael@0:      * When Debugger puts a script in single-step mode, all js::Interpret
michael@0:      * invocations that might be presently running that script must have
michael@0:      * interrupts enabled. It's not practical to simply check
michael@0:      * script->stepModeEnabled() at each point some callee could have changed
michael@0:      * it, because there are so many places js::Interpret could possibly cause
michael@0:      * JavaScript to run: each place an object might be coerced to a primitive
michael@0:      * or a number, for example. So instead, we expose a simple mechanism to
michael@0:      * let Debugger tweak the affected js::Interpret frames when an onStep
michael@0:      * handler is added: calling activation.enableInterruptsUnconditionally()
michael@0:      * will enable interrupts, and activation.opMask() is or'd with the opcode
michael@0:      * to implement a simple alternate dispatch.
michael@0:      */
michael@0: #define ADVANCE_AND_DISPATCH(N)                                               \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         REGS.pc += (N);                                                       \
michael@0:         SANITY_CHECKS();                                                      \
michael@0:         DISPATCH_TO(*REGS.pc | activation.opMask());                          \
michael@0:     JS_END_MACRO
michael@0: 
michael@0:    /*
michael@0:     * Shorthand for the common sequence at the end of a fixed-size opcode.
michael@0:     */
michael@0: #define END_CASE(OP)              ADVANCE_AND_DISPATCH(OP##_LENGTH);
michael@0: 
michael@0:     /*
michael@0:      * Prepare to call a user-supplied branch handler, and abort the script
michael@0:      * if it returns false.
michael@0:      */
michael@0: #define CHECK_BRANCH()                                                        \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         if (!CheckForInterrupt(cx))                                           \
michael@0:             goto error;                                                       \
michael@0:     JS_END_MACRO
michael@0: 
michael@0:     /*
michael@0:      * This is a simple wrapper around ADVANCE_AND_DISPATCH which also does
michael@0:      * a CHECK_BRANCH() if n is not positive, which possibly indicates that it
michael@0:      * is the backedge of a loop.
michael@0:      */
michael@0: #define BRANCH(n)                                                             \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         int32_t nlen = (n);                                                   \
michael@0:         if (nlen <= 0)                                                        \
michael@0:             CHECK_BRANCH();                                                   \
michael@0:         ADVANCE_AND_DISPATCH(nlen);                                           \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: #define LOAD_DOUBLE(PCOFF, dbl)                                               \
michael@0:     ((dbl) = script->getConst(GET_UINT32_INDEX(REGS.pc + (PCOFF))).toDouble())
michael@0: 
michael@0: #define SET_SCRIPT(s)                                                         \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         script = (s);                                                         \
michael@0:         if (script->hasAnyBreakpointsOrStepMode() || script->hasScriptCounts()) \
michael@0:             activation.enableInterruptsUnconditionally();                     \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: #define SANITY_CHECKS()                                                       \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         js::gc::MaybeVerifyBarriers(cx);                                      \
michael@0:         JS_ASSERT_IF(script->hasScriptCounts(),                               \
michael@0:                      activation.opMask() == EnableInterruptsPseudoOpcode);    \
michael@0:     JS_END_MACRO
michael@0: 
michael@0:     gc::MaybeVerifyBarriers(cx, true);
michael@0:     JS_ASSERT(!cx->compartment()->activeAnalysis);
michael@0: 
michael@0:     InterpreterFrame *entryFrame = state.pushInterpreterFrame(cx);
michael@0:     if (!entryFrame)
michael@0:         return false;
michael@0: 
michael@0:     InterpreterActivation activation(state, cx, entryFrame);
michael@0: 
michael@0:     /* The script is used frequently, so keep a local copy. */
michael@0:     RootedScript script(cx);
michael@0:     SET_SCRIPT(REGS.fp()->script());
michael@0: 
michael@0:     TraceLogger *logger = TraceLoggerForMainThread(cx->runtime());
michael@0:     uint32_t scriptLogId = TraceLogCreateTextId(logger, script);
michael@0:     TraceLogStartEvent(logger, scriptLogId);
michael@0:     TraceLogStartEvent(logger, TraceLogger::Interpreter);
michael@0: 
michael@0:     /*
michael@0:      * Pool of rooters for use in this interpreter frame. References to these
michael@0:      * are used for local variables within interpreter cases. This avoids
michael@0:      * creating new rooters each time an interpreter case is entered, and also
michael@0:      * correctness pitfalls due to incorrect compilation of destructor calls
michael@0:      * around computed gotos.
michael@0:      */
michael@0:     RootedValue rootValue0(cx), rootValue1(cx);
michael@0:     RootedString rootString0(cx), rootString1(cx);
michael@0:     RootedObject rootObject0(cx), rootObject1(cx), rootObject2(cx);
michael@0:     RootedFunction rootFunction0(cx);
michael@0:     RootedTypeObject rootType0(cx);
michael@0:     RootedPropertyName rootName0(cx);
michael@0:     RootedId rootId0(cx);
michael@0:     RootedShape rootShape0(cx);
michael@0:     RootedScript rootScript0(cx);
michael@0:     DebugOnly<uint32_t> blockDepth;
michael@0: 
michael@0:     if (MOZ_UNLIKELY(REGS.fp()->isGeneratorFrame())) {
michael@0:         JS_ASSERT(script->containsPC(REGS.pc));
michael@0:         JS_ASSERT(REGS.stackDepth() <= script->nslots());
michael@0: 
michael@0:         /*
michael@0:          * To support generator_throw and to catch ignored exceptions,
michael@0:          * fail if cx->isExceptionPending() is true.
michael@0:          */
michael@0:         if (cx->isExceptionPending()) {
michael@0:             probes::EnterScript(cx, script, script->functionNonDelazifying(), REGS.fp());
michael@0:             goto error;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /* State communicated between non-local jumps: */
michael@0:     bool interpReturnOK;
michael@0: 
michael@0:     if (!activation.entryFrame()->isGeneratorFrame()) {
michael@0:         if (!activation.entryFrame()->prologue(cx))
michael@0:             goto error;
michael@0:     } else {
michael@0:         if (!probes::EnterScript(cx, script, script->functionNonDelazifying(),
michael@0:                                  activation.entryFrame()))
michael@0:         {
michael@0:             goto error;
michael@0:         }
michael@0:     }
michael@0:     if (MOZ_UNLIKELY(cx->compartment()->debugMode())) {
michael@0:         JSTrapStatus status = ScriptDebugPrologue(cx, activation.entryFrame(), REGS.pc);
michael@0:         switch (status) {
michael@0:           case JSTRAP_CONTINUE:
michael@0:             break;
michael@0:           case JSTRAP_RETURN:
michael@0:             ForcedReturn(cx, REGS);
michael@0:             goto successful_return_continuation;
michael@0:           case JSTRAP_THROW:
michael@0:           case JSTRAP_ERROR:
michael@0:             goto error;
michael@0:           default:
michael@0:             MOZ_ASSUME_UNREACHABLE("bad ScriptDebugPrologue status");
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (cx->runtime()->profilingScripts || cx->runtime()->debugHooks.interruptHook)
michael@0:         activation.enableInterruptsUnconditionally();
michael@0: 
michael@0:     // Enter the interpreter loop starting at the current pc.
michael@0:     ADVANCE_AND_DISPATCH(0);
michael@0: 
michael@0: INTERPRETER_LOOP() {
michael@0: 
michael@0: CASE(EnableInterruptsPseudoOpcode)
michael@0: {
michael@0:     bool moreInterrupts = false;
michael@0:     jsbytecode op = *REGS.pc;
michael@0: 
michael@0:     if (cx->runtime()->profilingScripts) {
michael@0:         if (!script->hasScriptCounts())
michael@0:             script->initScriptCounts(cx);
michael@0:         moreInterrupts = true;
michael@0:     }
michael@0: 
michael@0:     if (script->hasScriptCounts()) {
michael@0:         PCCounts counts = script->getPCCounts(REGS.pc);
michael@0:         counts.get(PCCounts::BASE_INTERP)++;
michael@0:         moreInterrupts = true;
michael@0:     }
michael@0: 
michael@0:     if (cx->compartment()->debugMode()) {
michael@0:         JSInterruptHook hook = cx->runtime()->debugHooks.interruptHook;
michael@0:         if (hook || script->stepModeEnabled()) {
michael@0:             RootedValue rval(cx);
michael@0:             JSTrapStatus status = JSTRAP_CONTINUE;
michael@0:             if (hook)
michael@0:                 status = hook(cx, script, REGS.pc, rval.address(),
michael@0:                               cx->runtime()->debugHooks.interruptHookData);
michael@0:             if (status == JSTRAP_CONTINUE && script->stepModeEnabled())
michael@0:                 status = Debugger::onSingleStep(cx, &rval);
michael@0:             switch (status) {
michael@0:               case JSTRAP_ERROR:
michael@0:                 goto error;
michael@0:               case JSTRAP_CONTINUE:
michael@0:                 break;
michael@0:               case JSTRAP_RETURN:
michael@0:                 REGS.fp()->setReturnValue(rval);
michael@0:                 ForcedReturn(cx, REGS);
michael@0:                 goto successful_return_continuation;
michael@0:               case JSTRAP_THROW:
michael@0:                 cx->setPendingException(rval);
michael@0:                 goto error;
michael@0:               default:;
michael@0:             }
michael@0:             moreInterrupts = true;
michael@0:         }
michael@0: 
michael@0:         if (script->hasAnyBreakpointsOrStepMode())
michael@0:             moreInterrupts = true;
michael@0: 
michael@0:         if (script->hasBreakpointsAt(REGS.pc)) {
michael@0:             RootedValue rval(cx);
michael@0:             JSTrapStatus status = Debugger::onTrap(cx, &rval);
michael@0:             switch (status) {
michael@0:               case JSTRAP_ERROR:
michael@0:                 goto error;
michael@0:               case JSTRAP_RETURN:
michael@0:                 REGS.fp()->setReturnValue(rval);
michael@0:                 ForcedReturn(cx, REGS);
michael@0:                 goto successful_return_continuation;
michael@0:               case JSTRAP_THROW:
michael@0:                 cx->setPendingException(rval);
michael@0:                 goto error;
michael@0:               default:
michael@0:                 break;
michael@0:             }
michael@0:             JS_ASSERT(status == JSTRAP_CONTINUE);
michael@0:             JS_ASSERT(rval.isInt32() && rval.toInt32() == op);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     JS_ASSERT(activation.opMask() == EnableInterruptsPseudoOpcode);
michael@0:     if (!moreInterrupts)
michael@0:         activation.clearInterruptsMask();
michael@0: 
michael@0:     /* Commence executing the actual opcode. */
michael@0:     SANITY_CHECKS();
michael@0:     DISPATCH_TO(op);
michael@0: }
michael@0: 
michael@0: /* Various 1-byte no-ops. */
michael@0: CASE(JSOP_NOP)
michael@0: CASE(JSOP_UNUSED2)
michael@0: CASE(JSOP_UNUSED45)
michael@0: CASE(JSOP_UNUSED46)
michael@0: CASE(JSOP_UNUSED47)
michael@0: CASE(JSOP_UNUSED48)
michael@0: CASE(JSOP_UNUSED49)
michael@0: CASE(JSOP_UNUSED50)
michael@0: CASE(JSOP_UNUSED51)
michael@0: CASE(JSOP_UNUSED52)
michael@0: CASE(JSOP_UNUSED57)
michael@0: CASE(JSOP_UNUSED101)
michael@0: CASE(JSOP_UNUSED102)
michael@0: CASE(JSOP_UNUSED103)
michael@0: CASE(JSOP_UNUSED104)
michael@0: CASE(JSOP_UNUSED105)
michael@0: CASE(JSOP_UNUSED107)
michael@0: CASE(JSOP_UNUSED124)
michael@0: CASE(JSOP_UNUSED125)
michael@0: CASE(JSOP_UNUSED126)
michael@0: CASE(JSOP_UNUSED138)
michael@0: CASE(JSOP_UNUSED139)
michael@0: CASE(JSOP_UNUSED140)
michael@0: CASE(JSOP_UNUSED141)
michael@0: CASE(JSOP_UNUSED142)
michael@0: CASE(JSOP_UNUSED146)
michael@0: CASE(JSOP_UNUSED147)
michael@0: CASE(JSOP_UNUSED148)
michael@0: CASE(JSOP_BACKPATCH)
michael@0: CASE(JSOP_UNUSED150)
michael@0: CASE(JSOP_UNUSED156)
michael@0: CASE(JSOP_UNUSED157)
michael@0: CASE(JSOP_UNUSED158)
michael@0: CASE(JSOP_UNUSED159)
michael@0: CASE(JSOP_UNUSED161)
michael@0: CASE(JSOP_UNUSED162)
michael@0: CASE(JSOP_UNUSED163)
michael@0: CASE(JSOP_UNUSED164)
michael@0: CASE(JSOP_UNUSED165)
michael@0: CASE(JSOP_UNUSED166)
michael@0: CASE(JSOP_UNUSED167)
michael@0: CASE(JSOP_UNUSED168)
michael@0: CASE(JSOP_UNUSED169)
michael@0: CASE(JSOP_UNUSED170)
michael@0: CASE(JSOP_UNUSED171)
michael@0: CASE(JSOP_UNUSED172)
michael@0: CASE(JSOP_UNUSED173)
michael@0: CASE(JSOP_UNUSED174)
michael@0: CASE(JSOP_UNUSED175)
michael@0: CASE(JSOP_UNUSED176)
michael@0: CASE(JSOP_UNUSED177)
michael@0: CASE(JSOP_UNUSED178)
michael@0: CASE(JSOP_UNUSED179)
michael@0: CASE(JSOP_UNUSED180)
michael@0: CASE(JSOP_UNUSED181)
michael@0: CASE(JSOP_UNUSED182)
michael@0: CASE(JSOP_UNUSED183)
michael@0: CASE(JSOP_UNUSED185)
michael@0: CASE(JSOP_UNUSED186)
michael@0: CASE(JSOP_UNUSED187)
michael@0: CASE(JSOP_UNUSED189)
michael@0: CASE(JSOP_UNUSED190)
michael@0: CASE(JSOP_UNUSED191)
michael@0: CASE(JSOP_UNUSED192)
michael@0: CASE(JSOP_UNUSED196)
michael@0: CASE(JSOP_UNUSED201)
michael@0: CASE(JSOP_UNUSED205)
michael@0: CASE(JSOP_UNUSED206)
michael@0: CASE(JSOP_UNUSED207)
michael@0: CASE(JSOP_UNUSED208)
michael@0: CASE(JSOP_UNUSED209)
michael@0: CASE(JSOP_UNUSED210)
michael@0: CASE(JSOP_UNUSED211)
michael@0: CASE(JSOP_UNUSED212)
michael@0: CASE(JSOP_UNUSED213)
michael@0: CASE(JSOP_UNUSED219)
michael@0: CASE(JSOP_UNUSED220)
michael@0: CASE(JSOP_UNUSED221)
michael@0: CASE(JSOP_UNUSED222)
michael@0: CASE(JSOP_UNUSED223)
michael@0: CASE(JSOP_CONDSWITCH)
michael@0: CASE(JSOP_TRY)
michael@0: {
michael@0:     JS_ASSERT(js_CodeSpec[*REGS.pc].length == 1);
michael@0:     ADVANCE_AND_DISPATCH(1);
michael@0: }
michael@0: 
michael@0: CASE(JSOP_LOOPHEAD)
michael@0: END_CASE(JSOP_LOOPHEAD)
michael@0: 
michael@0: CASE(JSOP_LABEL)
michael@0: END_CASE(JSOP_LABEL)
michael@0: 
michael@0: CASE(JSOP_LOOPENTRY)
michael@0: 
michael@0: #ifdef JS_ION
michael@0:     // Attempt on-stack replacement with Baseline code.
michael@0:     if (jit::IsBaselineEnabled(cx)) {
michael@0:         jit::MethodStatus status = jit::CanEnterBaselineAtBranch(cx, REGS.fp(), false);
michael@0:         if (status == jit::Method_Error)
michael@0:             goto error;
michael@0:         if (status == jit::Method_Compiled) {
michael@0:             bool wasSPS = REGS.fp()->hasPushedSPSFrame();
michael@0:             jit::IonExecStatus maybeOsr = jit::EnterBaselineAtBranch(cx, REGS.fp(), REGS.pc);
michael@0: 
michael@0:             // We failed to call into baseline at all, so treat as an error.
michael@0:             if (maybeOsr == jit::IonExec_Aborted)
michael@0:                 goto error;
michael@0: 
michael@0:             interpReturnOK = (maybeOsr == jit::IonExec_Ok);
michael@0: 
michael@0:             // Pop the SPS frame pushed by the interpreter.  (The compiled version of the
michael@0:             // function popped a copy of the frame pushed by the OSR trampoline.)
michael@0:             if (wasSPS)
michael@0:                 cx->runtime()->spsProfiler.exit(script, script->functionNonDelazifying());
michael@0: 
michael@0:             if (activation.entryFrame() != REGS.fp())
michael@0:                 goto jit_return_pop_frame;
michael@0:             goto leave_on_safe_point;
michael@0:         }
michael@0:     }
michael@0: #endif /* JS_ION */
michael@0: 
michael@0: END_CASE(JSOP_LOOPENTRY)
michael@0: 
michael@0: CASE(JSOP_LINENO)
michael@0: END_CASE(JSOP_LINENO)
michael@0: 
michael@0: CASE(JSOP_UNDEFINED)
michael@0:     PUSH_UNDEFINED();
michael@0: END_CASE(JSOP_UNDEFINED)
michael@0: 
michael@0: CASE(JSOP_POP)
michael@0:     REGS.sp--;
michael@0: END_CASE(JSOP_POP)
michael@0: 
michael@0: CASE(JSOP_POPN)
michael@0:     JS_ASSERT(GET_UINT16(REGS.pc) <= REGS.stackDepth());
michael@0:     REGS.sp -= GET_UINT16(REGS.pc);
michael@0: END_CASE(JSOP_POPN)
michael@0: 
michael@0: CASE(JSOP_DUPAT)
michael@0: {
michael@0:     JS_ASSERT(GET_UINT24(REGS.pc) < REGS.stackDepth());
michael@0:     unsigned i = GET_UINT24(REGS.pc);
michael@0:     const Value &rref = REGS.sp[-int(i + 1)];
michael@0:     PUSH_COPY(rref);
michael@0: }
michael@0: END_CASE(JSOP_DUPAT)
michael@0: 
michael@0: CASE(JSOP_SETRVAL)
michael@0:     POP_RETURN_VALUE();
michael@0: END_CASE(JSOP_SETRVAL)
michael@0: 
michael@0: CASE(JSOP_ENTERWITH)
michael@0: {
michael@0:     RootedValue &val = rootValue0;
michael@0:     RootedObject &staticWith = rootObject0;
michael@0:     val = REGS.sp[-1];
michael@0:     REGS.sp--;
michael@0:     staticWith = script->getObject(REGS.pc);
michael@0: 
michael@0:     if (!EnterWithOperation(cx, REGS.fp(), val, staticWith))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_ENTERWITH)
michael@0: 
michael@0: CASE(JSOP_LEAVEWITH)
michael@0:     REGS.fp()->popWith(cx);
michael@0: END_CASE(JSOP_LEAVEWITH)
michael@0: 
michael@0: CASE(JSOP_RETURN)
michael@0:     POP_RETURN_VALUE();
michael@0:     /* FALL THROUGH */
michael@0: 
michael@0: CASE(JSOP_RETRVAL)
michael@0: {
michael@0:     /*
michael@0:      * When the inlined frame exits with an exception or an error, ok will be
michael@0:      * false after the inline_return label.
michael@0:      */
michael@0:     CHECK_BRANCH();
michael@0: 
michael@0:   successful_return_continuation:
michael@0:     interpReturnOK = true;
michael@0:   return_continuation:
michael@0:     if (activation.entryFrame() != REGS.fp())
michael@0:   inline_return:
michael@0:     {
michael@0:         // Stop the engine. (No details about which engine exactly, could be
michael@0:         // interpreter, Baseline or IonMonkey.)
michael@0:         TraceLogStopEvent(logger);
michael@0:         // Stop the script. (Again no details about which script exactly.)
michael@0:         TraceLogStopEvent(logger);
michael@0: 
michael@0:         if (MOZ_UNLIKELY(cx->compartment()->debugMode()))
michael@0:             interpReturnOK = ScriptDebugEpilogue(cx, REGS.fp(), REGS.pc, interpReturnOK);
michael@0: 
michael@0:         if (!REGS.fp()->isYielding())
michael@0:             REGS.fp()->epilogue(cx);
michael@0:         else
michael@0:             probes::ExitScript(cx, script, script->functionNonDelazifying(),
michael@0:                                REGS.fp()->hasPushedSPSFrame());
michael@0: 
michael@0: #if defined(JS_ION)
michael@0:   jit_return_pop_frame:
michael@0: #endif
michael@0: 
michael@0:         activation.popInlineFrame(REGS.fp());
michael@0:         SET_SCRIPT(REGS.fp()->script());
michael@0: 
michael@0: #if defined(JS_ION)
michael@0:   jit_return:
michael@0: #endif
michael@0: 
michael@0:         JS_ASSERT(js_CodeSpec[*REGS.pc].format & JOF_INVOKE);
michael@0: 
michael@0:         /* Resume execution in the calling frame. */
michael@0:         if (MOZ_LIKELY(interpReturnOK)) {
michael@0:             TypeScript::Monitor(cx, script, REGS.pc, REGS.sp[-1]);
michael@0: 
michael@0:             ADVANCE_AND_DISPATCH(JSOP_CALL_LENGTH);
michael@0:         }
michael@0: 
michael@0:         /* Increment pc so that |sp - fp->slots == ReconstructStackDepth(pc)|. */
michael@0:         REGS.pc += JSOP_CALL_LENGTH;
michael@0:         goto error;
michael@0:     } else {
michael@0:         JS_ASSERT(REGS.stackDepth() == 0);
michael@0:     }
michael@0:     goto exit;
michael@0: }
michael@0: 
michael@0: CASE(JSOP_DEFAULT)
michael@0:     REGS.sp--;
michael@0:     /* FALL THROUGH */
michael@0: CASE(JSOP_GOTO)
michael@0: {
michael@0:     BRANCH(GET_JUMP_OFFSET(REGS.pc));
michael@0: }
michael@0: 
michael@0: CASE(JSOP_IFEQ)
michael@0: {
michael@0:     bool cond = ToBooleanOp(REGS);
michael@0:     REGS.sp--;
michael@0:     if (!cond)
michael@0:         BRANCH(GET_JUMP_OFFSET(REGS.pc));
michael@0: }
michael@0: END_CASE(JSOP_IFEQ)
michael@0: 
michael@0: CASE(JSOP_IFNE)
michael@0: {
michael@0:     bool cond = ToBooleanOp(REGS);
michael@0:     REGS.sp--;
michael@0:     if (cond)
michael@0:         BRANCH(GET_JUMP_OFFSET(REGS.pc));
michael@0: }
michael@0: END_CASE(JSOP_IFNE)
michael@0: 
michael@0: CASE(JSOP_OR)
michael@0: {
michael@0:     bool cond = ToBooleanOp(REGS);
michael@0:     if (cond)
michael@0:         ADVANCE_AND_DISPATCH(GET_JUMP_OFFSET(REGS.pc));
michael@0: }
michael@0: END_CASE(JSOP_OR)
michael@0: 
michael@0: CASE(JSOP_AND)
michael@0: {
michael@0:     bool cond = ToBooleanOp(REGS);
michael@0:     if (!cond)
michael@0:         ADVANCE_AND_DISPATCH(GET_JUMP_OFFSET(REGS.pc));
michael@0: }
michael@0: END_CASE(JSOP_AND)
michael@0: 
michael@0: #define FETCH_ELEMENT_ID(n, id)                                               \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         if (!ValueToId<CanGC>(cx, REGS.stackHandleAt(n), &(id))) \
michael@0:             goto error;                                                       \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: #define TRY_BRANCH_AFTER_COND(cond,spdec)                                     \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         JS_ASSERT(js_CodeSpec[*REGS.pc].length == 1);                         \
michael@0:         unsigned diff_ = (unsigned) GET_UINT8(REGS.pc) - (unsigned) JSOP_IFEQ; \
michael@0:         if (diff_ <= 1) {                                                     \
michael@0:             REGS.sp -= (spdec);                                               \
michael@0:             if ((cond) == (diff_ != 0)) {                                     \
michael@0:                 ++REGS.pc;                                                    \
michael@0:                 BRANCH(GET_JUMP_OFFSET(REGS.pc));                             \
michael@0:             }                                                                 \
michael@0:             ADVANCE_AND_DISPATCH(1 + JSOP_IFEQ_LENGTH);                       \
michael@0:         }                                                                     \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: CASE(JSOP_IN)
michael@0: {
michael@0:     HandleValue rref = REGS.stackHandleAt(-1);
michael@0:     if (!rref.isObject()) {
michael@0:         js_ReportValueError(cx, JSMSG_IN_NOT_OBJECT, -1, rref, js::NullPtr());
michael@0:         goto error;
michael@0:     }
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &rref.toObject();
michael@0:     RootedId &id = rootId0;
michael@0:     FETCH_ELEMENT_ID(-2, id);
michael@0:     RootedObject &obj2 = rootObject1;
michael@0:     RootedShape &prop = rootShape0;
michael@0:     if (!JSObject::lookupGeneric(cx, obj, id, &obj2, &prop))
michael@0:         goto error;
michael@0:     bool cond = prop != nullptr;
michael@0:     prop = nullptr;
michael@0:     TRY_BRANCH_AFTER_COND(cond, 2);
michael@0:     REGS.sp--;
michael@0:     REGS.sp[-1].setBoolean(cond);
michael@0: }
michael@0: END_CASE(JSOP_IN)
michael@0: 
michael@0: CASE(JSOP_ITER)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 1);
michael@0:     uint8_t flags = GET_UINT8(REGS.pc);
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     if (!ValueToIterator(cx, flags, res))
michael@0:         goto error;
michael@0:     JS_ASSERT(!res.isPrimitive());
michael@0: }
michael@0: END_CASE(JSOP_ITER)
michael@0: 
michael@0: CASE(JSOP_MOREITER)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 1);
michael@0:     JS_ASSERT(REGS.sp[-1].isObject());
michael@0:     PUSH_NULL();
michael@0:     bool cond;
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     if (!IteratorMore(cx, &REGS.sp[-2].toObject(), &cond, res))
michael@0:         goto error;
michael@0:     REGS.sp[-1].setBoolean(cond);
michael@0: }
michael@0: END_CASE(JSOP_MOREITER)
michael@0: 
michael@0: CASE(JSOP_ITERNEXT)
michael@0: {
michael@0:     JS_ASSERT(REGS.sp[-1].isObject());
michael@0:     PUSH_NULL();
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-2].toObject();
michael@0:     if (!IteratorNext(cx, obj, res))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_ITERNEXT)
michael@0: 
michael@0: CASE(JSOP_ENDITER)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 1);
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-1].toObject();
michael@0:     bool ok = CloseIterator(cx, obj);
michael@0:     REGS.sp--;
michael@0:     if (!ok)
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_ENDITER)
michael@0: 
michael@0: CASE(JSOP_DUP)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 1);
michael@0:     const Value &rref = REGS.sp[-1];
michael@0:     PUSH_COPY(rref);
michael@0: }
michael@0: END_CASE(JSOP_DUP)
michael@0: 
michael@0: CASE(JSOP_DUP2)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 2);
michael@0:     const Value &lref = REGS.sp[-2];
michael@0:     const Value &rref = REGS.sp[-1];
michael@0:     PUSH_COPY(lref);
michael@0:     PUSH_COPY(rref);
michael@0: }
michael@0: END_CASE(JSOP_DUP2)
michael@0: 
michael@0: CASE(JSOP_SWAP)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 2);
michael@0:     Value &lref = REGS.sp[-2];
michael@0:     Value &rref = REGS.sp[-1];
michael@0:     lref.swap(rref);
michael@0: }
michael@0: END_CASE(JSOP_SWAP)
michael@0: 
michael@0: CASE(JSOP_PICK)
michael@0: {
michael@0:     unsigned i = GET_UINT8(REGS.pc);
michael@0:     JS_ASSERT(REGS.stackDepth() >= i + 1);
michael@0:     Value lval = REGS.sp[-int(i + 1)];
michael@0:     memmove(REGS.sp - (i + 1), REGS.sp - i, sizeof(Value) * i);
michael@0:     REGS.sp[-1] = lval;
michael@0: }
michael@0: END_CASE(JSOP_PICK)
michael@0: 
michael@0: CASE(JSOP_SETCONST)
michael@0: {
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     name = script->getName(REGS.pc);
michael@0: 
michael@0:     RootedValue &rval = rootValue0;
michael@0:     rval = REGS.sp[-1];
michael@0: 
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.fp()->varObj();
michael@0: 
michael@0:     if (!SetConstOperation(cx, obj, name, rval))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_SETCONST);
michael@0: 
michael@0: CASE(JSOP_BINDGNAME)
michael@0:     PUSH_OBJECT(REGS.fp()->global());
michael@0: END_CASE(JSOP_BINDGNAME)
michael@0: 
michael@0: CASE(JSOP_BINDINTRINSIC)
michael@0:     PUSH_OBJECT(*cx->global()->intrinsicsHolder());
michael@0: END_CASE(JSOP_BINDINTRINSIC)
michael@0: 
michael@0: CASE(JSOP_BINDNAME)
michael@0: {
michael@0:     RootedObject &scopeChain = rootObject0;
michael@0:     scopeChain = REGS.fp()->scopeChain();
michael@0: 
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     name = script->getName(REGS.pc);
michael@0: 
michael@0:     /* Assigning to an undeclared name adds a property to the global object. */
michael@0:     RootedObject &scope = rootObject1;
michael@0:     if (!LookupNameWithGlobalDefault(cx, name, scopeChain, &scope))
michael@0:         goto error;
michael@0: 
michael@0:     PUSH_OBJECT(*scope);
michael@0: }
michael@0: END_CASE(JSOP_BINDNAME)
michael@0: 
michael@0: #define BITWISE_OP(OP)                                                        \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         int32_t i, j;                                                         \
michael@0:         if (!ToInt32(cx, REGS.stackHandleAt(-2), &i))                         \
michael@0:             goto error;                                                       \
michael@0:         if (!ToInt32(cx, REGS.stackHandleAt(-1), &j))                         \
michael@0:             goto error;                                                       \
michael@0:         i = i OP j;                                                           \
michael@0:         REGS.sp--;                                                            \
michael@0:         REGS.sp[-1].setInt32(i);                                              \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: CASE(JSOP_BITOR)
michael@0:     BITWISE_OP(|);
michael@0: END_CASE(JSOP_BITOR)
michael@0: 
michael@0: CASE(JSOP_BITXOR)
michael@0:     BITWISE_OP(^);
michael@0: END_CASE(JSOP_BITXOR)
michael@0: 
michael@0: CASE(JSOP_BITAND)
michael@0:     BITWISE_OP(&);
michael@0: END_CASE(JSOP_BITAND)
michael@0: 
michael@0: #undef BITWISE_OP
michael@0: 
michael@0: CASE(JSOP_EQ)
michael@0:     if (!LooseEqualityOp<true>(cx, REGS))
michael@0:         goto error;
michael@0: END_CASE(JSOP_EQ)
michael@0: 
michael@0: CASE(JSOP_NE)
michael@0:     if (!LooseEqualityOp<false>(cx, REGS))
michael@0:         goto error;
michael@0: END_CASE(JSOP_NE)
michael@0: 
michael@0: #define STRICT_EQUALITY_OP(OP, COND)                                          \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         const Value &rref = REGS.sp[-1];                                      \
michael@0:         const Value &lref = REGS.sp[-2];                                      \
michael@0:         bool equal;                                                           \
michael@0:         if (!StrictlyEqual(cx, lref, rref, &equal))                           \
michael@0:             goto error;                                                       \
michael@0:         (COND) = equal OP true;                                               \
michael@0:         REGS.sp--;                                                            \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: CASE(JSOP_STRICTEQ)
michael@0: {
michael@0:     bool cond;
michael@0:     STRICT_EQUALITY_OP(==, cond);
michael@0:     REGS.sp[-1].setBoolean(cond);
michael@0: }
michael@0: END_CASE(JSOP_STRICTEQ)
michael@0: 
michael@0: CASE(JSOP_STRICTNE)
michael@0: {
michael@0:     bool cond;
michael@0:     STRICT_EQUALITY_OP(!=, cond);
michael@0:     REGS.sp[-1].setBoolean(cond);
michael@0: }
michael@0: END_CASE(JSOP_STRICTNE)
michael@0: 
michael@0: CASE(JSOP_CASE)
michael@0: {
michael@0:     bool cond;
michael@0:     STRICT_EQUALITY_OP(==, cond);
michael@0:     if (cond) {
michael@0:         REGS.sp--;
michael@0:         BRANCH(GET_JUMP_OFFSET(REGS.pc));
michael@0:     }
michael@0: }
michael@0: END_CASE(JSOP_CASE)
michael@0: 
michael@0: #undef STRICT_EQUALITY_OP
michael@0: 
michael@0: CASE(JSOP_LT)
michael@0: {
michael@0:     bool cond;
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-2);
michael@0:     MutableHandleValue rval = REGS.stackHandleAt(-1);
michael@0:     if (!LessThanOperation(cx, lval, rval, &cond))
michael@0:         goto error;
michael@0:     TRY_BRANCH_AFTER_COND(cond, 2);
michael@0:     REGS.sp[-2].setBoolean(cond);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_LT)
michael@0: 
michael@0: CASE(JSOP_LE)
michael@0: {
michael@0:     bool cond;
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-2);
michael@0:     MutableHandleValue rval = REGS.stackHandleAt(-1);
michael@0:     if (!LessThanOrEqualOperation(cx, lval, rval, &cond))
michael@0:         goto error;
michael@0:     TRY_BRANCH_AFTER_COND(cond, 2);
michael@0:     REGS.sp[-2].setBoolean(cond);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_LE)
michael@0: 
michael@0: CASE(JSOP_GT)
michael@0: {
michael@0:     bool cond;
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-2);
michael@0:     MutableHandleValue rval = REGS.stackHandleAt(-1);
michael@0:     if (!GreaterThanOperation(cx, lval, rval, &cond))
michael@0:         goto error;
michael@0:     TRY_BRANCH_AFTER_COND(cond, 2);
michael@0:     REGS.sp[-2].setBoolean(cond);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_GT)
michael@0: 
michael@0: CASE(JSOP_GE)
michael@0: {
michael@0:     bool cond;
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-2);
michael@0:     MutableHandleValue rval = REGS.stackHandleAt(-1);
michael@0:     if (!GreaterThanOrEqualOperation(cx, lval, rval, &cond))
michael@0:         goto error;
michael@0:     TRY_BRANCH_AFTER_COND(cond, 2);
michael@0:     REGS.sp[-2].setBoolean(cond);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_GE)
michael@0: 
michael@0: #define SIGNED_SHIFT_OP(OP)                                                   \
michael@0:     JS_BEGIN_MACRO                                                            \
michael@0:         int32_t i, j;                                                         \
michael@0:         if (!ToInt32(cx, REGS.stackHandleAt(-2), &i))                         \
michael@0:             goto error;                                                       \
michael@0:         if (!ToInt32(cx, REGS.stackHandleAt(-1), &j))                         \
michael@0:             goto error;                                                       \
michael@0:         i = i OP (j & 31);                                                    \
michael@0:         REGS.sp--;                                                            \
michael@0:         REGS.sp[-1].setInt32(i);                                              \
michael@0:     JS_END_MACRO
michael@0: 
michael@0: CASE(JSOP_LSH)
michael@0:     SIGNED_SHIFT_OP(<<);
michael@0: END_CASE(JSOP_LSH)
michael@0: 
michael@0: CASE(JSOP_RSH)
michael@0:     SIGNED_SHIFT_OP(>>);
michael@0: END_CASE(JSOP_RSH)
michael@0: 
michael@0: #undef SIGNED_SHIFT_OP
michael@0: 
michael@0: CASE(JSOP_URSH)
michael@0: {
michael@0:     HandleValue lval = REGS.stackHandleAt(-2);
michael@0:     HandleValue rval = REGS.stackHandleAt(-1);
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     if (!UrshOperation(cx, lval, rval, res))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_URSH)
michael@0: 
michael@0: CASE(JSOP_ADD)
michael@0: {
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-2);
michael@0:     MutableHandleValue rval = REGS.stackHandleAt(-1);
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     if (!AddOperation(cx, lval, rval, res))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_ADD)
michael@0: 
michael@0: CASE(JSOP_SUB)
michael@0: {
michael@0:     RootedValue &lval = rootValue0, &rval = rootValue1;
michael@0:     lval = REGS.sp[-2];
michael@0:     rval = REGS.sp[-1];
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     if (!SubOperation(cx, lval, rval, res))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_SUB)
michael@0: 
michael@0: CASE(JSOP_MUL)
michael@0: {
michael@0:     RootedValue &lval = rootValue0, &rval = rootValue1;
michael@0:     lval = REGS.sp[-2];
michael@0:     rval = REGS.sp[-1];
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     if (!MulOperation(cx, lval, rval, res))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_MUL)
michael@0: 
michael@0: CASE(JSOP_DIV)
michael@0: {
michael@0:     RootedValue &lval = rootValue0, &rval = rootValue1;
michael@0:     lval = REGS.sp[-2];
michael@0:     rval = REGS.sp[-1];
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     if (!DivOperation(cx, lval, rval, res))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_DIV)
michael@0: 
michael@0: CASE(JSOP_MOD)
michael@0: {
michael@0:     RootedValue &lval = rootValue0, &rval = rootValue1;
michael@0:     lval = REGS.sp[-2];
michael@0:     rval = REGS.sp[-1];
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     if (!ModOperation(cx, lval, rval, res))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_MOD)
michael@0: 
michael@0: CASE(JSOP_NOT)
michael@0: {
michael@0:     bool cond = ToBooleanOp(REGS);
michael@0:     REGS.sp--;
michael@0:     PUSH_BOOLEAN(!cond);
michael@0: }
michael@0: END_CASE(JSOP_NOT)
michael@0: 
michael@0: CASE(JSOP_BITNOT)
michael@0: {
michael@0:     int32_t i;
michael@0:     HandleValue value = REGS.stackHandleAt(-1);
michael@0:     if (!BitNot(cx, value, &i))
michael@0:         goto error;
michael@0:     REGS.sp[-1].setInt32(i);
michael@0: }
michael@0: END_CASE(JSOP_BITNOT)
michael@0: 
michael@0: CASE(JSOP_NEG)
michael@0: {
michael@0:     RootedValue &val = rootValue0;
michael@0:     val = REGS.sp[-1];
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     if (!NegOperation(cx, script, REGS.pc, val, res))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_NEG)
michael@0: 
michael@0: CASE(JSOP_POS)
michael@0:     if (!ToNumber(cx, REGS.stackHandleAt(-1)))
michael@0:         goto error;
michael@0: END_CASE(JSOP_POS)
michael@0: 
michael@0: CASE(JSOP_DELNAME)
michael@0: {
michael@0:     /* Strict mode code should never contain JSOP_DELNAME opcodes. */
michael@0:     JS_ASSERT(!script->strict());
michael@0: 
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     name = script->getName(REGS.pc);
michael@0: 
michael@0:     RootedObject &scopeObj = rootObject0;
michael@0:     scopeObj = REGS.fp()->scopeChain();
michael@0: 
michael@0:     PUSH_BOOLEAN(true);
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     if (!DeleteNameOperation(cx, name, scopeObj, res))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_DELNAME)
michael@0: 
michael@0: CASE(JSOP_DELPROP)
michael@0: {
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     name = script->getName(REGS.pc);
michael@0: 
michael@0:     RootedObject &obj = rootObject0;
michael@0:     FETCH_OBJECT(cx, -1, obj);
michael@0: 
michael@0:     bool succeeded;
michael@0:     if (!JSObject::deleteProperty(cx, obj, name, &succeeded))
michael@0:         goto error;
michael@0:     if (!succeeded && script->strict()) {
michael@0:         obj->reportNotConfigurable(cx, NameToId(name));
michael@0:         goto error;
michael@0:     }
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     res.setBoolean(succeeded);
michael@0: }
michael@0: END_CASE(JSOP_DELPROP)
michael@0: 
michael@0: CASE(JSOP_DELELEM)
michael@0: {
michael@0:     /* Fetch the left part and resolve it to a non-null object. */
michael@0:     RootedObject &obj = rootObject0;
michael@0:     FETCH_OBJECT(cx, -2, obj);
michael@0: 
michael@0:     RootedValue &propval = rootValue0;
michael@0:     propval = REGS.sp[-1];
michael@0: 
michael@0:     bool succeeded;
michael@0:     if (!JSObject::deleteByValue(cx, obj, propval, &succeeded))
michael@0:         goto error;
michael@0:     if (!succeeded && script->strict()) {
michael@0:         // XXX This observably calls ToString(propval).  We should convert to
michael@0:         //     PropertyKey and use that to delete, and to report an error if
michael@0:         //     necessary!
michael@0:         RootedId id(cx);
michael@0:         if (!ValueToId<CanGC>(cx, propval, &id))
michael@0:             goto error;
michael@0:         obj->reportNotConfigurable(cx, id);
michael@0:         goto error;
michael@0:     }
michael@0: 
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0:     res.setBoolean(succeeded);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_DELELEM)
michael@0: 
michael@0: CASE(JSOP_TOID)
michael@0: {
michael@0:     /*
michael@0:      * Increment or decrement requires use to lookup the same property twice,
michael@0:      * but we need to avoid the observable stringification the second time.
michael@0:      * There must be an object value below the id, which will not be popped.
michael@0:      */
michael@0:     RootedValue &objval = rootValue0, &idval = rootValue1;
michael@0:     objval = REGS.sp[-2];
michael@0:     idval = REGS.sp[-1];
michael@0: 
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     if (!ToIdOperation(cx, script, REGS.pc, objval, idval, res))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_TOID)
michael@0: 
michael@0: CASE(JSOP_TYPEOFEXPR)
michael@0: CASE(JSOP_TYPEOF)
michael@0: {
michael@0:     REGS.sp[-1].setString(TypeOfOperation(REGS.sp[-1], cx->runtime()));
michael@0: }
michael@0: END_CASE(JSOP_TYPEOF)
michael@0: 
michael@0: CASE(JSOP_VOID)
michael@0:     REGS.sp[-1].setUndefined();
michael@0: END_CASE(JSOP_VOID)
michael@0: 
michael@0: CASE(JSOP_THIS)
michael@0:     if (!ComputeThis(cx, REGS.fp()))
michael@0:         goto error;
michael@0:     PUSH_COPY(REGS.fp()->thisValue());
michael@0: END_CASE(JSOP_THIS)
michael@0: 
michael@0: CASE(JSOP_GETPROP)
michael@0: CASE(JSOP_GETXPROP)
michael@0: CASE(JSOP_LENGTH)
michael@0: CASE(JSOP_CALLPROP)
michael@0: {
michael@0: 
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-1);
michael@0:     if (!GetPropertyOperation(cx, REGS.fp(), script, REGS.pc, lval, lval))
michael@0:         goto error;
michael@0: 
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, lval);
michael@0:     assertSameCompartmentDebugOnly(cx, lval);
michael@0: }
michael@0: END_CASE(JSOP_GETPROP)
michael@0: 
michael@0: CASE(JSOP_SETINTRINSIC)
michael@0: {
michael@0:     HandleValue value = REGS.stackHandleAt(-1);
michael@0: 
michael@0:     if (!SetIntrinsicOperation(cx, script, REGS.pc, value))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp[-2] = REGS.sp[-1];
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_SETINTRINSIC)
michael@0: 
michael@0: CASE(JSOP_SETGNAME)
michael@0: CASE(JSOP_SETNAME)
michael@0: {
michael@0:     RootedObject &scope = rootObject0;
michael@0:     scope = &REGS.sp[-2].toObject();
michael@0: 
michael@0:     HandleValue value = REGS.stackHandleAt(-1);
michael@0: 
michael@0:     if (!SetNameOperation(cx, script, REGS.pc, scope, value))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp[-2] = REGS.sp[-1];
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_SETNAME)
michael@0: 
michael@0: CASE(JSOP_SETPROP)
michael@0: {
michael@0:     HandleValue lval = REGS.stackHandleAt(-2);
michael@0:     HandleValue rval = REGS.stackHandleAt(-1);
michael@0: 
michael@0:     if (!SetPropertyOperation(cx, script, REGS.pc, lval, rval))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp[-2] = REGS.sp[-1];
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_SETPROP)
michael@0: 
michael@0: CASE(JSOP_GETELEM)
michael@0: CASE(JSOP_CALLELEM)
michael@0: {
michael@0:     MutableHandleValue lval = REGS.stackHandleAt(-2);
michael@0:     HandleValue rval = REGS.stackHandleAt(-1);
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-2);
michael@0: 
michael@0:     bool done = false;
michael@0:     if (!GetElemOptimizedArguments(cx, REGS.fp(), lval, rval, res, &done))
michael@0:         goto error;
michael@0: 
michael@0:     if (!done) {
michael@0:         if (!GetElementOperation(cx, JSOp(*REGS.pc), lval, rval, res))
michael@0:             goto error;
michael@0:     }
michael@0: 
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, res);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_GETELEM)
michael@0: 
michael@0: CASE(JSOP_SETELEM)
michael@0: {
michael@0:     RootedObject &obj = rootObject0;
michael@0:     FETCH_OBJECT(cx, -3, obj);
michael@0:     RootedId &id = rootId0;
michael@0:     FETCH_ELEMENT_ID(-2, id);
michael@0:     Value &value = REGS.sp[-1];
michael@0:     if (!SetObjectElementOperation(cx, obj, id, value, script->strict()))
michael@0:         goto error;
michael@0:     REGS.sp[-3] = value;
michael@0:     REGS.sp -= 2;
michael@0: }
michael@0: END_CASE(JSOP_SETELEM)
michael@0: 
michael@0: CASE(JSOP_EVAL)
michael@0: {
michael@0:     CallArgs args = CallArgsFromSp(GET_ARGC(REGS.pc), REGS.sp);
michael@0:     if (REGS.fp()->scopeChain()->global().valueIsEval(args.calleev())) {
michael@0:         if (!DirectEval(cx, args))
michael@0:             goto error;
michael@0:     } else {
michael@0:         if (!Invoke(cx, args))
michael@0:             goto error;
michael@0:     }
michael@0:     REGS.sp = args.spAfterCall();
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, REGS.sp[-1]);
michael@0: }
michael@0: END_CASE(JSOP_EVAL)
michael@0: 
michael@0: CASE(JSOP_SPREADNEW)
michael@0: CASE(JSOP_SPREADCALL)
michael@0:     if (REGS.fp()->hasPushedSPSFrame())
michael@0:         cx->runtime()->spsProfiler.updatePC(script, REGS.pc);
michael@0:     /* FALL THROUGH */
michael@0: 
michael@0: CASE(JSOP_SPREADEVAL)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 3);
michael@0:     RootedObject &aobj = rootObject0;
michael@0:     aobj = &REGS.sp[-1].toObject();
michael@0: 
michael@0:     uint32_t length = aobj->as<ArrayObject>().length();
michael@0: 
michael@0:     if (length > ARGS_LENGTH_MAX) {
michael@0:         JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
michael@0:                              *REGS.pc == JSOP_SPREADNEW ? JSMSG_TOO_MANY_CON_SPREADARGS
michael@0:                                                         : JSMSG_TOO_MANY_FUN_SPREADARGS);
michael@0:         goto error;
michael@0:     }
michael@0: 
michael@0:     InvokeArgs args(cx);
michael@0: 
michael@0:     if (!args.init(length))
michael@0:         return false;
michael@0: 
michael@0:     args.setCallee(REGS.sp[-3]);
michael@0:     args.setThis(REGS.sp[-2]);
michael@0: 
michael@0:     if (!GetElements(cx, aobj, length, args.array()))
michael@0:         goto error;
michael@0: 
michael@0:     switch (*REGS.pc) {
michael@0:       case JSOP_SPREADNEW:
michael@0:         if (!InvokeConstructor(cx, args))
michael@0:             goto error;
michael@0:         break;
michael@0:       case JSOP_SPREADCALL:
michael@0:         if (!Invoke(cx, args))
michael@0:             goto error;
michael@0:         break;
michael@0:       case JSOP_SPREADEVAL:
michael@0:         if (REGS.fp()->scopeChain()->global().valueIsEval(args.calleev())) {
michael@0:             if (!DirectEval(cx, args))
michael@0:                 goto error;
michael@0:         } else {
michael@0:             if (!Invoke(cx, args))
michael@0:                 goto error;
michael@0:         }
michael@0:         break;
michael@0:       default:
michael@0:         MOZ_ASSUME_UNREACHABLE("bad spread opcode");
michael@0:     }
michael@0: 
michael@0:     REGS.sp -= 2;
michael@0:     REGS.sp[-1] = args.rval();
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, REGS.sp[-1]);
michael@0: }
michael@0: END_CASE(JSOP_SPREADCALL)
michael@0: 
michael@0: CASE(JSOP_FUNAPPLY)
michael@0: {
michael@0:     CallArgs args = CallArgsFromSp(GET_ARGC(REGS.pc), REGS.sp);
michael@0:     if (!GuardFunApplyArgumentsOptimization(cx, REGS.fp(), args.calleev(), args.array(),
michael@0:                                             args.length()))
michael@0:         goto error;
michael@0:     /* FALL THROUGH */
michael@0: }
michael@0: 
michael@0: CASE(JSOP_NEW)
michael@0: CASE(JSOP_CALL)
michael@0: CASE(JSOP_FUNCALL)
michael@0: {
michael@0:     if (REGS.fp()->hasPushedSPSFrame())
michael@0:         cx->runtime()->spsProfiler.updatePC(script, REGS.pc);
michael@0:     JS_ASSERT(REGS.stackDepth() >= 2 + GET_ARGC(REGS.pc));
michael@0:     CallArgs args = CallArgsFromSp(GET_ARGC(REGS.pc), REGS.sp);
michael@0: 
michael@0:     bool construct = (*REGS.pc == JSOP_NEW);
michael@0: 
michael@0:     RootedFunction &fun = rootFunction0;
michael@0:     RootedScript &funScript = rootScript0;
michael@0:     bool isFunction = IsFunctionObject(args.calleev(), fun.address());
michael@0: 
michael@0:     /*
michael@0:      * Some builtins are marked as clone-at-callsite to increase precision of
michael@0:      * TI and JITs.
michael@0:      */
michael@0:     if (isFunction && fun->isInterpreted()) {
michael@0:         funScript = fun->getOrCreateScript(cx);
michael@0:         if (!funScript)
michael@0:             goto error;
michael@0:         if (funScript->shouldCloneAtCallsite()) {
michael@0:             fun = CloneFunctionAtCallsite(cx, fun, script, REGS.pc);
michael@0:             if (!fun)
michael@0:                 goto error;
michael@0:             args.setCallee(ObjectValue(*fun));
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /* Don't bother trying to fast-path calls to scripted non-constructors. */
michael@0:     if (!isFunction || !fun->isInterpretedConstructor()) {
michael@0:         if (construct) {
michael@0:             if (!InvokeConstructor(cx, args))
michael@0:                 goto error;
michael@0:         } else {
michael@0:             if (!Invoke(cx, args))
michael@0:                 goto error;
michael@0:         }
michael@0:         Value *newsp = args.spAfterCall();
michael@0:         TypeScript::Monitor(cx, script, REGS.pc, newsp[-1]);
michael@0:         REGS.sp = newsp;
michael@0:         ADVANCE_AND_DISPATCH(JSOP_CALL_LENGTH);
michael@0:     }
michael@0: 
michael@0:     InitialFrameFlags initial = construct ? INITIAL_CONSTRUCT : INITIAL_NONE;
michael@0:     bool newType = UseNewType(cx, script, REGS.pc);
michael@0: 
michael@0:     TypeMonitorCall(cx, args, construct);
michael@0: 
michael@0: #ifdef JS_ION
michael@0:     {
michael@0:         InvokeState state(cx, args, initial);
michael@0:         if (newType)
michael@0:             state.setUseNewType();
michael@0: 
michael@0:         if (!newType && jit::IsIonEnabled(cx)) {
michael@0:             jit::MethodStatus status = jit::CanEnter(cx, state);
michael@0:             if (status == jit::Method_Error)
michael@0:                 goto error;
michael@0:             if (status == jit::Method_Compiled) {
michael@0:                 jit::IonExecStatus exec = jit::IonCannon(cx, state);
michael@0:                 CHECK_BRANCH();
michael@0:                 REGS.sp = args.spAfterCall();
michael@0:                 interpReturnOK = !IsErrorStatus(exec);
michael@0:                 goto jit_return;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         if (jit::IsBaselineEnabled(cx)) {
michael@0:             jit::MethodStatus status = jit::CanEnterBaselineMethod(cx, state);
michael@0:             if (status == jit::Method_Error)
michael@0:                 goto error;
michael@0:             if (status == jit::Method_Compiled) {
michael@0:                 jit::IonExecStatus exec = jit::EnterBaselineMethod(cx, state);
michael@0:                 CHECK_BRANCH();
michael@0:                 REGS.sp = args.spAfterCall();
michael@0:                 interpReturnOK = !IsErrorStatus(exec);
michael@0:                 goto jit_return;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     funScript = fun->nonLazyScript();
michael@0:     if (!activation.pushInlineFrame(args, funScript, initial))
michael@0:         goto error;
michael@0: 
michael@0:     if (newType)
michael@0:         REGS.fp()->setUseNewType();
michael@0: 
michael@0:     SET_SCRIPT(REGS.fp()->script());
michael@0: 
michael@0:     uint32_t scriptLogId = TraceLogCreateTextId(logger, script);
michael@0:     TraceLogStartEvent(logger, scriptLogId);
michael@0:     TraceLogStartEvent(logger, TraceLogger::Interpreter);
michael@0: 
michael@0:     if (!REGS.fp()->prologue(cx))
michael@0:         goto error;
michael@0:     if (MOZ_UNLIKELY(cx->compartment()->debugMode())) {
michael@0:         switch (ScriptDebugPrologue(cx, REGS.fp(), REGS.pc)) {
michael@0:           case JSTRAP_CONTINUE:
michael@0:             break;
michael@0:           case JSTRAP_RETURN:
michael@0:             ForcedReturn(cx, REGS);
michael@0:             goto successful_return_continuation;
michael@0:           case JSTRAP_THROW:
michael@0:           case JSTRAP_ERROR:
michael@0:             goto error;
michael@0:           default:
michael@0:             MOZ_ASSUME_UNREACHABLE("bad ScriptDebugPrologue status");
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /* Load first op and dispatch it (safe since JSOP_RETRVAL). */
michael@0:     ADVANCE_AND_DISPATCH(0);
michael@0: }
michael@0: 
michael@0: CASE(JSOP_SETCALL)
michael@0: {
michael@0:     JS_ALWAYS_FALSE(SetCallOperation(cx));
michael@0:     goto error;
michael@0: }
michael@0: END_CASE(JSOP_SETCALL)
michael@0: 
michael@0: CASE(JSOP_IMPLICITTHIS)
michael@0: {
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     name = script->getName(REGS.pc);
michael@0: 
michael@0:     RootedObject &scopeObj = rootObject0;
michael@0:     scopeObj = REGS.fp()->scopeChain();
michael@0: 
michael@0:     RootedObject &scope = rootObject1;
michael@0:     if (!LookupNameWithGlobalDefault(cx, name, scopeObj, &scope))
michael@0:         goto error;
michael@0: 
michael@0:     RootedValue &v = rootValue0;
michael@0:     if (!ComputeImplicitThis(cx, scope, &v))
michael@0:         goto error;
michael@0:     PUSH_COPY(v);
michael@0: }
michael@0: END_CASE(JSOP_IMPLICITTHIS)
michael@0: 
michael@0: CASE(JSOP_GETGNAME)
michael@0: CASE(JSOP_NAME)
michael@0: {
michael@0:     RootedValue &rval = rootValue0;
michael@0: 
michael@0:     if (!NameOperation(cx, REGS.fp(), REGS.pc, &rval))
michael@0:         goto error;
michael@0: 
michael@0:     PUSH_COPY(rval);
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, rval);
michael@0: }
michael@0: END_CASE(JSOP_NAME)
michael@0: 
michael@0: CASE(JSOP_GETINTRINSIC)
michael@0: {
michael@0:     RootedValue &rval = rootValue0;
michael@0: 
michael@0:     if (!GetIntrinsicOperation(cx, REGS.pc, &rval))
michael@0:         goto error;
michael@0: 
michael@0:     PUSH_COPY(rval);
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, rval);
michael@0: }
michael@0: END_CASE(JSOP_GETINTRINSIC)
michael@0: 
michael@0: CASE(JSOP_UINT16)
michael@0:     PUSH_INT32((int32_t) GET_UINT16(REGS.pc));
michael@0: END_CASE(JSOP_UINT16)
michael@0: 
michael@0: CASE(JSOP_UINT24)
michael@0:     PUSH_INT32((int32_t) GET_UINT24(REGS.pc));
michael@0: END_CASE(JSOP_UINT24)
michael@0: 
michael@0: CASE(JSOP_INT8)
michael@0:     PUSH_INT32(GET_INT8(REGS.pc));
michael@0: END_CASE(JSOP_INT8)
michael@0: 
michael@0: CASE(JSOP_INT32)
michael@0:     PUSH_INT32(GET_INT32(REGS.pc));
michael@0: END_CASE(JSOP_INT32)
michael@0: 
michael@0: CASE(JSOP_DOUBLE)
michael@0: {
michael@0:     double dbl;
michael@0:     LOAD_DOUBLE(0, dbl);
michael@0:     PUSH_DOUBLE(dbl);
michael@0: }
michael@0: END_CASE(JSOP_DOUBLE)
michael@0: 
michael@0: CASE(JSOP_STRING)
michael@0:     PUSH_STRING(script->getAtom(REGS.pc));
michael@0: END_CASE(JSOP_STRING)
michael@0: 
michael@0: CASE(JSOP_OBJECT)
michael@0: {
michael@0:     RootedObject &ref = rootObject0;
michael@0:     ref = script->getObject(REGS.pc);
michael@0:     if (JS::CompartmentOptionsRef(cx).cloneSingletons(cx)) {
michael@0:         JSObject *obj = js::DeepCloneObjectLiteral(cx, ref, js::MaybeSingletonObject);
michael@0:         if (!obj)
michael@0:             goto error;
michael@0:         PUSH_OBJECT(*obj);
michael@0:     } else {
michael@0:         JS::CompartmentOptionsRef(cx).setSingletonsAsValues();
michael@0:         PUSH_OBJECT(*ref);
michael@0:     }
michael@0: }
michael@0: END_CASE(JSOP_OBJECT)
michael@0: 
michael@0: CASE(JSOP_REGEXP)
michael@0: {
michael@0:     /*
michael@0:      * Push a regexp object cloned from the regexp literal object mapped by the
michael@0:      * bytecode at pc.
michael@0:      */
michael@0:     JSObject *obj = CloneRegExpObject(cx, script->getRegExp(REGS.pc));
michael@0:     if (!obj)
michael@0:         goto error;
michael@0:     PUSH_OBJECT(*obj);
michael@0: }
michael@0: END_CASE(JSOP_REGEXP)
michael@0: 
michael@0: CASE(JSOP_ZERO)
michael@0:     PUSH_INT32(0);
michael@0: END_CASE(JSOP_ZERO)
michael@0: 
michael@0: CASE(JSOP_ONE)
michael@0:     PUSH_INT32(1);
michael@0: END_CASE(JSOP_ONE)
michael@0: 
michael@0: CASE(JSOP_NULL)
michael@0:     PUSH_NULL();
michael@0: END_CASE(JSOP_NULL)
michael@0: 
michael@0: CASE(JSOP_FALSE)
michael@0:     PUSH_BOOLEAN(false);
michael@0: END_CASE(JSOP_FALSE)
michael@0: 
michael@0: CASE(JSOP_TRUE)
michael@0:     PUSH_BOOLEAN(true);
michael@0: END_CASE(JSOP_TRUE)
michael@0: 
michael@0: CASE(JSOP_TABLESWITCH)
michael@0: {
michael@0:     jsbytecode *pc2 = REGS.pc;
michael@0:     int32_t len = GET_JUMP_OFFSET(pc2);
michael@0: 
michael@0:     /*
michael@0:      * ECMAv2+ forbids conversion of discriminant, so we will skip to the
michael@0:      * default case if the discriminant isn't already an int jsval.  (This
michael@0:      * opcode is emitted only for dense int-domain switches.)
michael@0:      */
michael@0:     const Value &rref = *--REGS.sp;
michael@0:     int32_t i;
michael@0:     if (rref.isInt32()) {
michael@0:         i = rref.toInt32();
michael@0:     } else {
michael@0:         /* Use mozilla::NumberEqualsInt32 to treat -0 (double) as 0. */
michael@0:         if (!rref.isDouble() || !NumberEqualsInt32(rref.toDouble(), &i))
michael@0:             ADVANCE_AND_DISPATCH(len);
michael@0:     }
michael@0: 
michael@0:     pc2 += JUMP_OFFSET_LEN;
michael@0:     int32_t low = GET_JUMP_OFFSET(pc2);
michael@0:     pc2 += JUMP_OFFSET_LEN;
michael@0:     int32_t high = GET_JUMP_OFFSET(pc2);
michael@0: 
michael@0:     i -= low;
michael@0:     if ((uint32_t)i < (uint32_t)(high - low + 1)) {
michael@0:         pc2 += JUMP_OFFSET_LEN + JUMP_OFFSET_LEN * i;
michael@0:         int32_t off = (int32_t) GET_JUMP_OFFSET(pc2);
michael@0:         if (off)
michael@0:             len = off;
michael@0:     }
michael@0:     ADVANCE_AND_DISPATCH(len);
michael@0: }
michael@0: 
michael@0: CASE(JSOP_ARGUMENTS)
michael@0:     JS_ASSERT(!REGS.fp()->fun()->hasRest());
michael@0:     if (!script->ensureHasAnalyzedArgsUsage(cx))
michael@0:         goto error;
michael@0:     if (script->needsArgsObj()) {
michael@0:         ArgumentsObject *obj = ArgumentsObject::createExpected(cx, REGS.fp());
michael@0:         if (!obj)
michael@0:             goto error;
michael@0:         PUSH_COPY(ObjectValue(*obj));
michael@0:     } else {
michael@0:         PUSH_COPY(MagicValue(JS_OPTIMIZED_ARGUMENTS));
michael@0:     }
michael@0: END_CASE(JSOP_ARGUMENTS)
michael@0: 
michael@0: CASE(JSOP_RUNONCE)
michael@0: {
michael@0:     if (!RunOnceScriptPrologue(cx, script))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_RUNONCE)
michael@0: 
michael@0: CASE(JSOP_REST)
michael@0: {
michael@0:     RootedObject &rest = rootObject0;
michael@0:     rest = REGS.fp()->createRestParameter(cx);
michael@0:     if (!rest)
michael@0:         goto error;
michael@0:     PUSH_COPY(ObjectValue(*rest));
michael@0: }
michael@0: END_CASE(JSOP_REST)
michael@0: 
michael@0: CASE(JSOP_GETALIASEDVAR)
michael@0: {
michael@0:     ScopeCoordinate sc = ScopeCoordinate(REGS.pc);
michael@0:     PUSH_COPY(REGS.fp()->aliasedVarScope(sc).aliasedVar(sc));
michael@0:     TypeScript::Monitor(cx, script, REGS.pc, REGS.sp[-1]);
michael@0: }
michael@0: END_CASE(JSOP_GETALIASEDVAR)
michael@0: 
michael@0: CASE(JSOP_SETALIASEDVAR)
michael@0: {
michael@0:     ScopeCoordinate sc = ScopeCoordinate(REGS.pc);
michael@0:     ScopeObject &obj = REGS.fp()->aliasedVarScope(sc);
michael@0: 
michael@0:     // Avoid computing the name if no type updates are needed, as this may be
michael@0:     // expensive on scopes with large numbers of variables.
michael@0:     PropertyName *name = (obj.hasSingletonType() && !obj.hasLazyType())
michael@0:                          ? ScopeCoordinateName(cx->runtime()->scopeCoordinateNameCache, script, REGS.pc)
michael@0:                          : nullptr;
michael@0: 
michael@0:     obj.setAliasedVar(cx, sc, name, REGS.sp[-1]);
michael@0: }
michael@0: END_CASE(JSOP_SETALIASEDVAR)
michael@0: 
michael@0: CASE(JSOP_GETARG)
michael@0: {
michael@0:     unsigned i = GET_ARGNO(REGS.pc);
michael@0:     if (script->argsObjAliasesFormals())
michael@0:         PUSH_COPY(REGS.fp()->argsObj().arg(i));
michael@0:     else
michael@0:         PUSH_COPY(REGS.fp()->unaliasedFormal(i));
michael@0: }
michael@0: END_CASE(JSOP_GETARG)
michael@0: 
michael@0: CASE(JSOP_SETARG)
michael@0: {
michael@0:     unsigned i = GET_ARGNO(REGS.pc);
michael@0:     if (script->argsObjAliasesFormals())
michael@0:         REGS.fp()->argsObj().setArg(i, REGS.sp[-1]);
michael@0:     else
michael@0:         REGS.fp()->unaliasedFormal(i) = REGS.sp[-1];
michael@0: }
michael@0: END_CASE(JSOP_SETARG)
michael@0: 
michael@0: CASE(JSOP_GETLOCAL)
michael@0: {
michael@0:     uint32_t i = GET_LOCALNO(REGS.pc);
michael@0:     PUSH_COPY_SKIP_CHECK(REGS.fp()->unaliasedLocal(i));
michael@0: 
michael@0:     /*
michael@0:      * Skip the same-compartment assertion if the local will be immediately
michael@0:      * popped. We do not guarantee sync for dead locals when coming in from the
michael@0:      * method JIT, and a GETLOCAL followed by POP is not considered to be
michael@0:      * a use of the variable.
michael@0:      */
michael@0:     if (REGS.pc[JSOP_GETLOCAL_LENGTH] != JSOP_POP)
michael@0:         assertSameCompartmentDebugOnly(cx, REGS.sp[-1]);
michael@0: }
michael@0: END_CASE(JSOP_GETLOCAL)
michael@0: 
michael@0: CASE(JSOP_SETLOCAL)
michael@0: {
michael@0:     uint32_t i = GET_LOCALNO(REGS.pc);
michael@0:     REGS.fp()->unaliasedLocal(i) = REGS.sp[-1];
michael@0: }
michael@0: END_CASE(JSOP_SETLOCAL)
michael@0: 
michael@0: CASE(JSOP_DEFCONST)
michael@0: CASE(JSOP_DEFVAR)
michael@0: {
michael@0:     /* ES5 10.5 step 8 (with subsequent errata). */
michael@0:     unsigned attrs = JSPROP_ENUMERATE;
michael@0:     if (!REGS.fp()->isEvalFrame())
michael@0:         attrs |= JSPROP_PERMANENT;
michael@0:     if (*REGS.pc == JSOP_DEFCONST)
michael@0:         attrs |= JSPROP_READONLY;
michael@0: 
michael@0:     /* Step 8b. */
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.fp()->varObj();
michael@0: 
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     name = script->getName(REGS.pc);
michael@0: 
michael@0:     if (!DefVarOrConstOperation(cx, obj, name, attrs))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_DEFVAR)
michael@0: 
michael@0: CASE(JSOP_DEFFUN)
michael@0: {
michael@0:     /*
michael@0:      * A top-level function defined in Global or Eval code (see ECMA-262
michael@0:      * Ed. 3), or else a SpiderMonkey extension: a named function statement in
michael@0:      * a compound statement (not at the top statement level of global code, or
michael@0:      * at the top level of a function body).
michael@0:      */
michael@0:     RootedFunction &fun = rootFunction0;
michael@0:     fun = script->getFunction(GET_UINT32_INDEX(REGS.pc));
michael@0: 
michael@0:     if (!DefFunOperation(cx, script, REGS.fp()->scopeChain(), fun))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_DEFFUN)
michael@0: 
michael@0: CASE(JSOP_LAMBDA)
michael@0: {
michael@0:     /* Load the specified function object literal. */
michael@0:     RootedFunction &fun = rootFunction0;
michael@0:     fun = script->getFunction(GET_UINT32_INDEX(REGS.pc));
michael@0: 
michael@0:     JSObject *obj = Lambda(cx, fun, REGS.fp()->scopeChain());
michael@0:     if (!obj)
michael@0:         goto error;
michael@0:     JS_ASSERT(obj->getProto());
michael@0:     PUSH_OBJECT(*obj);
michael@0: }
michael@0: END_CASE(JSOP_LAMBDA)
michael@0: 
michael@0: CASE(JSOP_LAMBDA_ARROW)
michael@0: {
michael@0:     /* Load the specified function object literal. */
michael@0:     RootedFunction &fun = rootFunction0;
michael@0:     fun = script->getFunction(GET_UINT32_INDEX(REGS.pc));
michael@0:     RootedValue &thisv = rootValue0;
michael@0:     thisv = REGS.sp[-1];
michael@0:     JSObject *obj = LambdaArrow(cx, fun, REGS.fp()->scopeChain(), thisv);
michael@0:     if (!obj)
michael@0:         goto error;
michael@0:     JS_ASSERT(obj->getProto());
michael@0:     REGS.sp[-1].setObject(*obj);
michael@0: }
michael@0: END_CASE(JSOP_LAMBDA_ARROW)
michael@0: 
michael@0: CASE(JSOP_CALLEE)
michael@0:     JS_ASSERT(REGS.fp()->isNonEvalFunctionFrame());
michael@0:     PUSH_COPY(REGS.fp()->calleev());
michael@0: END_CASE(JSOP_CALLEE)
michael@0: 
michael@0: CASE(JSOP_INITPROP_GETTER)
michael@0: CASE(JSOP_INITPROP_SETTER)
michael@0: {
michael@0:     RootedObject &obj = rootObject0;
michael@0:     RootedPropertyName &name = rootName0;
michael@0:     RootedObject &val = rootObject1;
michael@0: 
michael@0:     JS_ASSERT(REGS.stackDepth() >= 2);
michael@0:     obj = &REGS.sp[-2].toObject();
michael@0:     name = script->getName(REGS.pc);
michael@0:     val = &REGS.sp[-1].toObject();
michael@0: 
michael@0:     if (!InitGetterSetterOperation(cx, REGS.pc, obj, name, val))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_INITPROP_GETTER)
michael@0: 
michael@0: CASE(JSOP_INITELEM_GETTER)
michael@0: CASE(JSOP_INITELEM_SETTER)
michael@0: {
michael@0:     RootedObject &obj = rootObject0;
michael@0:     RootedValue &idval = rootValue0;
michael@0:     RootedObject &val = rootObject1;
michael@0: 
michael@0:     JS_ASSERT(REGS.stackDepth() >= 3);
michael@0:     obj = &REGS.sp[-3].toObject();
michael@0:     idval = REGS.sp[-2];
michael@0:     val = &REGS.sp[-1].toObject();
michael@0: 
michael@0:     if (!InitGetterSetterOperation(cx, REGS.pc, obj, idval, val))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp -= 2;
michael@0: }
michael@0: END_CASE(JSOP_INITELEM_GETTER)
michael@0: 
michael@0: CASE(JSOP_HOLE)
michael@0:     PUSH_HOLE();
michael@0: END_CASE(JSOP_HOLE)
michael@0: 
michael@0: CASE(JSOP_NEWINIT)
michael@0: {
michael@0:     uint8_t i = GET_UINT8(REGS.pc);
michael@0:     JS_ASSERT(i == JSProto_Array || i == JSProto_Object);
michael@0: 
michael@0:     RootedObject &obj = rootObject0;
michael@0:     NewObjectKind newKind;
michael@0:     if (i == JSProto_Array) {
michael@0:         newKind = UseNewTypeForInitializer(script, REGS.pc, &ArrayObject::class_);
michael@0:         obj = NewDenseEmptyArray(cx, nullptr, newKind);
michael@0:     } else {
michael@0:         gc::AllocKind allocKind = GuessObjectGCKind(0);
michael@0:         newKind = UseNewTypeForInitializer(script, REGS.pc, &JSObject::class_);
michael@0:         obj = NewBuiltinClassInstance(cx, &JSObject::class_, allocKind, newKind);
michael@0:     }
michael@0:     if (!obj || !SetInitializerObjectType(cx, script, REGS.pc, obj, newKind))
michael@0:         goto error;
michael@0: 
michael@0:     PUSH_OBJECT(*obj);
michael@0: }
michael@0: END_CASE(JSOP_NEWINIT)
michael@0: 
michael@0: CASE(JSOP_NEWARRAY)
michael@0: {
michael@0:     unsigned count = GET_UINT24(REGS.pc);
michael@0:     RootedObject &obj = rootObject0;
michael@0:     NewObjectKind newKind = UseNewTypeForInitializer(script, REGS.pc, &ArrayObject::class_);
michael@0:     obj = NewDenseAllocatedArray(cx, count, nullptr, newKind);
michael@0:     if (!obj || !SetInitializerObjectType(cx, script, REGS.pc, obj, newKind))
michael@0:         goto error;
michael@0: 
michael@0:     PUSH_OBJECT(*obj);
michael@0: }
michael@0: END_CASE(JSOP_NEWARRAY)
michael@0: 
michael@0: CASE(JSOP_NEWOBJECT)
michael@0: {
michael@0:     RootedObject &baseobj = rootObject0;
michael@0:     baseobj = script->getObject(REGS.pc);
michael@0: 
michael@0:     RootedObject &obj = rootObject1;
michael@0:     NewObjectKind newKind = UseNewTypeForInitializer(script, REGS.pc, baseobj->getClass());
michael@0:     obj = CopyInitializerObject(cx, baseobj, newKind);
michael@0:     if (!obj || !SetInitializerObjectType(cx, script, REGS.pc, obj, newKind))
michael@0:         goto error;
michael@0: 
michael@0:     PUSH_OBJECT(*obj);
michael@0: }
michael@0: END_CASE(JSOP_NEWOBJECT)
michael@0: 
michael@0: CASE(JSOP_ENDINIT)
michael@0: {
michael@0:     /* FIXME remove JSOP_ENDINIT bug 588522 */
michael@0:     JS_ASSERT(REGS.stackDepth() >= 1);
michael@0:     JS_ASSERT(REGS.sp[-1].isObject() || REGS.sp[-1].isUndefined());
michael@0: }
michael@0: END_CASE(JSOP_ENDINIT)
michael@0: 
michael@0: CASE(JSOP_MUTATEPROTO)
michael@0: {
michael@0:     MOZ_ASSERT(REGS.stackDepth() >= 2);
michael@0: 
michael@0:     if (REGS.sp[-1].isObjectOrNull()) {
michael@0:         RootedObject &newProto = rootObject1;
michael@0:         rootObject1 = REGS.sp[-1].toObjectOrNull();
michael@0: 
michael@0:         RootedObject &obj = rootObject0;
michael@0:         obj = &REGS.sp[-2].toObject();
michael@0:         MOZ_ASSERT(obj->is<JSObject>());
michael@0: 
michael@0:         bool succeeded;
michael@0:         if (!JSObject::setProto(cx, obj, newProto, &succeeded))
michael@0:             goto error;
michael@0:         MOZ_ASSERT(succeeded);
michael@0:     }
michael@0: 
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_MUTATEPROTO);
michael@0: 
michael@0: CASE(JSOP_INITPROP)
michael@0: {
michael@0:     /* Load the property's initial value into rval. */
michael@0:     JS_ASSERT(REGS.stackDepth() >= 2);
michael@0:     RootedValue &rval = rootValue0;
michael@0:     rval = REGS.sp[-1];
michael@0: 
michael@0:     /* Load the object being initialized into lval/obj. */
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-2].toObject();
michael@0:     JS_ASSERT(obj->is<JSObject>());
michael@0: 
michael@0:     PropertyName *name = script->getName(REGS.pc);
michael@0: 
michael@0:     RootedId &id = rootId0;
michael@0:     id = NameToId(name);
michael@0: 
michael@0:     if (!DefineNativeProperty(cx, obj, id, rval, nullptr, nullptr, JSPROP_ENUMERATE))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_INITPROP);
michael@0: 
michael@0: CASE(JSOP_INITELEM)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 3);
michael@0:     HandleValue val = REGS.stackHandleAt(-1);
michael@0:     HandleValue id = REGS.stackHandleAt(-2);
michael@0: 
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-3].toObject();
michael@0: 
michael@0:     if (!InitElemOperation(cx, obj, id, val))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp -= 2;
michael@0: }
michael@0: END_CASE(JSOP_INITELEM)
michael@0: 
michael@0: CASE(JSOP_INITELEM_ARRAY)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 2);
michael@0:     HandleValue val = REGS.stackHandleAt(-1);
michael@0: 
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-2].toObject();
michael@0: 
michael@0:     JS_ASSERT(obj->is<ArrayObject>());
michael@0: 
michael@0:     uint32_t index = GET_UINT24(REGS.pc);
michael@0:     if (!InitArrayElemOperation(cx, REGS.pc, obj, index, val))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_INITELEM_ARRAY)
michael@0: 
michael@0: CASE(JSOP_INITELEM_INC)
michael@0: {
michael@0:     JS_ASSERT(REGS.stackDepth() >= 3);
michael@0:     HandleValue val = REGS.stackHandleAt(-1);
michael@0: 
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-3].toObject();
michael@0: 
michael@0:     uint32_t index = REGS.sp[-2].toInt32();
michael@0:     if (!InitArrayElemOperation(cx, REGS.pc, obj, index, val))
michael@0:         goto error;
michael@0: 
michael@0:     REGS.sp[-2].setInt32(index + 1);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_INITELEM_INC)
michael@0: 
michael@0: CASE(JSOP_SPREAD)
michael@0: {
michael@0:     int32_t count = REGS.sp[-2].toInt32();
michael@0:     RootedObject &arr = rootObject0;
michael@0:     arr = &REGS.sp[-3].toObject();
michael@0:     const Value iterable = REGS.sp[-1];
michael@0:     ForOfIterator iter(cx);
michael@0:     RootedValue &iterVal = rootValue0;
michael@0:     iterVal.set(iterable);
michael@0:     if (!iter.init(iterVal))
michael@0:         goto error;
michael@0:     while (true) {
michael@0:         bool done;
michael@0:         if (!iter.next(&iterVal, &done))
michael@0:             goto error;
michael@0:         if (done)
michael@0:             break;
michael@0:         if (count == INT32_MAX) {
michael@0:             JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
michael@0:                                  JSMSG_SPREAD_TOO_LARGE);
michael@0:             goto error;
michael@0:         }
michael@0:         if (!JSObject::defineElement(cx, arr, count++, iterVal, nullptr, nullptr,
michael@0:                                      JSPROP_ENUMERATE))
michael@0:             goto error;
michael@0:     }
michael@0:     REGS.sp[-2].setInt32(count);
michael@0:     REGS.sp--;
michael@0: }
michael@0: END_CASE(JSOP_SPREAD)
michael@0: 
michael@0: CASE(JSOP_GOSUB)
michael@0: {
michael@0:     PUSH_BOOLEAN(false);
michael@0:     int32_t i = script->pcToOffset(REGS.pc) + JSOP_GOSUB_LENGTH;
michael@0:     int32_t len = GET_JUMP_OFFSET(REGS.pc);
michael@0:     PUSH_INT32(i);
michael@0:     ADVANCE_AND_DISPATCH(len);
michael@0: }
michael@0: 
michael@0: CASE(JSOP_RETSUB)
michael@0: {
michael@0:     /* Pop [exception or hole, retsub pc-index]. */
michael@0:     Value rval, lval;
michael@0:     POP_COPY_TO(rval);
michael@0:     POP_COPY_TO(lval);
michael@0:     JS_ASSERT(lval.isBoolean());
michael@0:     if (lval.toBoolean()) {
michael@0:         /*
michael@0:          * Exception was pending during finally, throw it *before* we adjust
michael@0:          * pc, because pc indexes into script->trynotes.  This turns out not to
michael@0:          * be necessary, but it seems clearer.  And it points out a FIXME:
michael@0:          * 350509, due to Igor Bukanov.
michael@0:          */
michael@0:         cx->setPendingException(rval);
michael@0:         goto error;
michael@0:     }
michael@0:     JS_ASSERT(rval.isInt32());
michael@0: 
michael@0:     /* Increment the PC by this much. */
michael@0:     int32_t len = rval.toInt32() - int32_t(script->pcToOffset(REGS.pc));
michael@0:     ADVANCE_AND_DISPATCH(len);
michael@0: }
michael@0: 
michael@0: CASE(JSOP_EXCEPTION)
michael@0: {
michael@0:     PUSH_NULL();
michael@0:     MutableHandleValue res = REGS.stackHandleAt(-1);
michael@0:     if (!GetAndClearException(cx, res))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_EXCEPTION)
michael@0: 
michael@0: CASE(JSOP_FINALLY)
michael@0:     CHECK_BRANCH();
michael@0: END_CASE(JSOP_FINALLY)
michael@0: 
michael@0: CASE(JSOP_THROWING)
michael@0: {
michael@0:     JS_ASSERT(!cx->isExceptionPending());
michael@0:     Value v;
michael@0:     POP_COPY_TO(v);
michael@0:     cx->setPendingException(v);
michael@0: }
michael@0: END_CASE(JSOP_THROWING)
michael@0: 
michael@0: CASE(JSOP_THROW)
michael@0: {
michael@0:     CHECK_BRANCH();
michael@0:     RootedValue &v = rootValue0;
michael@0:     POP_COPY_TO(v);
michael@0:     JS_ALWAYS_FALSE(Throw(cx, v));
michael@0:     /* let the code at error try to catch the exception. */
michael@0:     goto error;
michael@0: }
michael@0: 
michael@0: CASE(JSOP_INSTANCEOF)
michael@0: {
michael@0:     RootedValue &rref = rootValue0;
michael@0:     rref = REGS.sp[-1];
michael@0:     if (rref.isPrimitive()) {
michael@0:         js_ReportValueError(cx, JSMSG_BAD_INSTANCEOF_RHS, -1, rref, js::NullPtr());
michael@0:         goto error;
michael@0:     }
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &rref.toObject();
michael@0:     bool cond = false;
michael@0:     if (!HasInstance(cx, obj, REGS.stackHandleAt(-2), &cond))
michael@0:         goto error;
michael@0:     REGS.sp--;
michael@0:     REGS.sp[-1].setBoolean(cond);
michael@0: }
michael@0: END_CASE(JSOP_INSTANCEOF)
michael@0: 
michael@0: CASE(JSOP_DEBUGGER)
michael@0: {
michael@0:     JSTrapStatus st = JSTRAP_CONTINUE;
michael@0:     RootedValue rval(cx);
michael@0:     if (JSDebuggerHandler handler = cx->runtime()->debugHooks.debuggerHandler)
michael@0:         st = handler(cx, script, REGS.pc, rval.address(), cx->runtime()->debugHooks.debuggerHandlerData);
michael@0:     if (st == JSTRAP_CONTINUE)
michael@0:         st = Debugger::onDebuggerStatement(cx, &rval);
michael@0:     switch (st) {
michael@0:       case JSTRAP_ERROR:
michael@0:         goto error;
michael@0:       case JSTRAP_CONTINUE:
michael@0:         break;
michael@0:       case JSTRAP_RETURN:
michael@0:         REGS.fp()->setReturnValue(rval);
michael@0:         ForcedReturn(cx, REGS);
michael@0:         goto successful_return_continuation;
michael@0:       case JSTRAP_THROW:
michael@0:         cx->setPendingException(rval);
michael@0:         goto error;
michael@0:       default:;
michael@0:     }
michael@0: }
michael@0: END_CASE(JSOP_DEBUGGER)
michael@0: 
michael@0: CASE(JSOP_PUSHBLOCKSCOPE)
michael@0: {
michael@0:     StaticBlockObject &blockObj = script->getObject(REGS.pc)->as<StaticBlockObject>();
michael@0: 
michael@0:     JS_ASSERT(blockObj.needsClone());
michael@0:     // Clone block and push on scope chain.
michael@0:     if (!REGS.fp()->pushBlock(cx, blockObj))
michael@0:         goto error;
michael@0: }
michael@0: END_CASE(JSOP_PUSHBLOCKSCOPE)
michael@0: 
michael@0: CASE(JSOP_POPBLOCKSCOPE)
michael@0: {
michael@0: #ifdef DEBUG
michael@0:     // Pop block from scope chain.
michael@0:     JS_ASSERT(*(REGS.pc - JSOP_DEBUGLEAVEBLOCK_LENGTH) == JSOP_DEBUGLEAVEBLOCK);
michael@0:     NestedScopeObject *scope = script->getStaticScope(REGS.pc - JSOP_DEBUGLEAVEBLOCK_LENGTH);
michael@0:     JS_ASSERT(scope && scope->is<StaticBlockObject>());
michael@0:     StaticBlockObject &blockObj = scope->as<StaticBlockObject>();
michael@0:     JS_ASSERT(blockObj.needsClone());
michael@0: #endif
michael@0: 
michael@0:     // Pop block from scope chain.
michael@0:     REGS.fp()->popBlock(cx);
michael@0: }
michael@0: END_CASE(JSOP_POPBLOCKSCOPE)
michael@0: 
michael@0: CASE(JSOP_DEBUGLEAVEBLOCK)
michael@0: {
michael@0:     JS_ASSERT(script->getStaticScope(REGS.pc));
michael@0:     JS_ASSERT(script->getStaticScope(REGS.pc)->is<StaticBlockObject>());
michael@0: 
michael@0:     // FIXME: This opcode should not be necessary.  The debugger shouldn't need
michael@0:     // help from bytecode to do its job.  See bug 927782.
michael@0: 
michael@0:     if (MOZ_UNLIKELY(cx->compartment()->debugMode()))
michael@0:         DebugScopes::onPopBlock(cx, REGS.fp(), REGS.pc);
michael@0: }
michael@0: END_CASE(JSOP_DEBUGLEAVEBLOCK)
michael@0: 
michael@0: CASE(JSOP_GENERATOR)
michael@0: {
michael@0:     JS_ASSERT(!cx->isExceptionPending());
michael@0:     REGS.fp()->initGeneratorFrame();
michael@0:     REGS.pc += JSOP_GENERATOR_LENGTH;
michael@0:     JSObject *obj = js_NewGenerator(cx, REGS);
michael@0:     if (!obj)
michael@0:         goto error;
michael@0:     REGS.fp()->setReturnValue(ObjectValue(*obj));
michael@0:     REGS.fp()->setYielding();
michael@0:     interpReturnOK = true;
michael@0:     if (activation.entryFrame() != REGS.fp())
michael@0:         goto inline_return;
michael@0:     goto exit;
michael@0: }
michael@0: 
michael@0: CASE(JSOP_YIELD)
michael@0:     JS_ASSERT(!cx->isExceptionPending());
michael@0:     JS_ASSERT(REGS.fp()->isNonEvalFunctionFrame());
michael@0:     if (cx->innermostGenerator()->state == JSGEN_CLOSING) {
michael@0:         RootedValue &val = rootValue0;
michael@0:         val.setObject(REGS.fp()->callee());
michael@0:         js_ReportValueError(cx, JSMSG_BAD_GENERATOR_YIELD, JSDVG_SEARCH_STACK, val, js::NullPtr());
michael@0:         goto error;
michael@0:     }
michael@0:     REGS.fp()->setReturnValue(REGS.sp[-1]);
michael@0:     REGS.fp()->setYielding();
michael@0:     REGS.pc += JSOP_YIELD_LENGTH;
michael@0:     interpReturnOK = true;
michael@0:     goto exit;
michael@0: 
michael@0: CASE(JSOP_ARRAYPUSH)
michael@0: {
michael@0:     RootedObject &obj = rootObject0;
michael@0:     obj = &REGS.sp[-1].toObject();
michael@0:     if (!NewbornArrayPush(cx, obj, REGS.sp[-2]))
michael@0:         goto error;
michael@0:     REGS.sp -= 2;
michael@0: }
michael@0: END_CASE(JSOP_ARRAYPUSH)
michael@0: 
michael@0: DEFAULT()
michael@0: {
michael@0:     char numBuf[12];
michael@0:     JS_snprintf(numBuf, sizeof numBuf, "%d", *REGS.pc);
michael@0:     JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
michael@0:                          JSMSG_BAD_BYTECODE, numBuf);
michael@0:     goto error;
michael@0: }
michael@0: 
michael@0: } /* interpreter loop */
michael@0: 
michael@0:     MOZ_ASSUME_UNREACHABLE("Interpreter loop exited via fallthrough");
michael@0: 
michael@0:   error:
michael@0:     switch (HandleError(cx, REGS)) {
michael@0:       case SuccessfulReturnContinuation:
michael@0:         goto successful_return_continuation;
michael@0: 
michael@0:       case ErrorReturnContinuation:
michael@0:         interpReturnOK = false;
michael@0:         goto return_continuation;
michael@0: 
michael@0:       case CatchContinuation:
michael@0:         ADVANCE_AND_DISPATCH(0);
michael@0: 
michael@0:       case FinallyContinuation:
michael@0:         /*
michael@0:          * Push (true, exception) pair for finally to indicate that [retsub]
michael@0:          * should rethrow the exception.
michael@0:          */
michael@0:         RootedValue &exception = rootValue0;
michael@0:         if (!cx->getPendingException(&exception)) {
michael@0:             interpReturnOK = false;
michael@0:             goto return_continuation;
michael@0:         }
michael@0:         PUSH_BOOLEAN(true);
michael@0:         PUSH_COPY(exception);
michael@0:         cx->clearPendingException();
michael@0:         ADVANCE_AND_DISPATCH(0);
michael@0:     }
michael@0:     MOZ_ASSUME_UNREACHABLE("Invalid HandleError continuation");
michael@0: 
michael@0:   exit:
michael@0:     if (MOZ_UNLIKELY(cx->compartment()->debugMode()))
michael@0:         interpReturnOK = ScriptDebugEpilogue(cx, REGS.fp(), REGS.pc, interpReturnOK);
michael@0:     if (!REGS.fp()->isYielding())
michael@0:         REGS.fp()->epilogue(cx);
michael@0:     else
michael@0:         probes::ExitScript(cx, script, script->functionNonDelazifying(),
michael@0:                            REGS.fp()->hasPushedSPSFrame());
michael@0: 
michael@0:     gc::MaybeVerifyBarriers(cx, true);
michael@0: 
michael@0:     TraceLogStopEvent(logger);
michael@0:     TraceLogStopEvent(logger, scriptLogId);
michael@0: 
michael@0: #ifdef JS_ION
michael@0:     /*
michael@0:      * This path is used when it's guaranteed the method can be finished
michael@0:      * inside the JIT.
michael@0:      */
michael@0:   leave_on_safe_point:
michael@0: #endif
michael@0: 
michael@0:     if (interpReturnOK)
michael@0:         state.setReturnValue(activation.entryFrame()->returnValue());
michael@0: 
michael@0:     return interpReturnOK;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::Throw(JSContext *cx, HandleValue v)
michael@0: {
michael@0:     JS_ASSERT(!cx->isExceptionPending());
michael@0:     cx->setPendingException(v);
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::GetProperty(JSContext *cx, HandleValue v, HandlePropertyName name, MutableHandleValue vp)
michael@0: {
michael@0:     if (name == cx->names().length) {
michael@0:         // Fast path for strings, arrays and arguments.
michael@0:         if (GetLengthProperty(v, vp))
michael@0:             return true;
michael@0:     }
michael@0: 
michael@0:     RootedObject obj(cx, ToObjectFromStack(cx, v));
michael@0:     if (!obj)
michael@0:         return false;
michael@0:     return JSObject::getProperty(cx, obj, obj, name, vp);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::CallProperty(JSContext *cx, HandleValue v, HandlePropertyName name, MutableHandleValue vp)
michael@0: {
michael@0:     if (!GetProperty(cx, v, name, vp))
michael@0:         return false;
michael@0: 
michael@0: #if JS_HAS_NO_SUCH_METHOD
michael@0:     if (MOZ_UNLIKELY(vp.isUndefined()) && v.isObject())
michael@0:     {
michael@0:         RootedObject obj(cx, &v.toObject());
michael@0:         if (!OnUnknownMethod(cx, obj, StringValue(name), vp))
michael@0:             return false;
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::GetScopeName(JSContext *cx, HandleObject scopeChain, HandlePropertyName name, MutableHandleValue vp)
michael@0: {
michael@0:     RootedShape shape(cx);
michael@0:     RootedObject obj(cx), pobj(cx);
michael@0:     if (!LookupName(cx, name, scopeChain, &obj, &pobj, &shape))
michael@0:         return false;
michael@0: 
michael@0:     if (!shape) {
michael@0:         JSAutoByteString printable;
michael@0:         if (AtomToPrintableString(cx, name, &printable))
michael@0:             js_ReportIsNotDefined(cx, printable.ptr());
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     return JSObject::getProperty(cx, obj, obj, name, vp);
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * Alternate form for NAME opcodes followed immediately by a TYPEOF,
michael@0:  * which do not report an exception on (typeof foo == "undefined") tests.
michael@0:  */
michael@0: bool
michael@0: js::GetScopeNameForTypeOf(JSContext *cx, HandleObject scopeChain, HandlePropertyName name,
michael@0:                           MutableHandleValue vp)
michael@0: {
michael@0:     RootedShape shape(cx);
michael@0:     RootedObject obj(cx), pobj(cx);
michael@0:     if (!LookupName(cx, name, scopeChain, &obj, &pobj, &shape))
michael@0:         return false;
michael@0: 
michael@0:     if (!shape) {
michael@0:         vp.set(UndefinedValue());
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     return JSObject::getProperty(cx, obj, obj, name, vp);
michael@0: }
michael@0: 
michael@0: JSObject *
michael@0: js::Lambda(JSContext *cx, HandleFunction fun, HandleObject parent)
michael@0: {
michael@0:     MOZ_ASSERT(!fun->isArrow());
michael@0: 
michael@0:     RootedObject clone(cx, CloneFunctionObjectIfNotSingleton(cx, fun, parent, TenuredObject));
michael@0:     if (!clone)
michael@0:         return nullptr;
michael@0: 
michael@0:     MOZ_ASSERT(clone->global() == clone->global());
michael@0:     return clone;
michael@0: }
michael@0: 
michael@0: JSObject *
michael@0: js::LambdaArrow(JSContext *cx, HandleFunction fun, HandleObject parent, HandleValue thisv)
michael@0: {
michael@0:     MOZ_ASSERT(fun->isArrow());
michael@0: 
michael@0:     RootedObject clone(cx, CloneFunctionObjectIfNotSingleton(cx, fun, parent, TenuredObject));
michael@0:     if (!clone)
michael@0:         return nullptr;
michael@0: 
michael@0:     MOZ_ASSERT(clone->as<JSFunction>().isArrow());
michael@0:     clone->as<JSFunction>().setExtendedSlot(0, thisv);
michael@0: 
michael@0:     MOZ_ASSERT(clone->global() == clone->global());
michael@0:     return clone;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::DefFunOperation(JSContext *cx, HandleScript script, HandleObject scopeChain,
michael@0:                     HandleFunction funArg)
michael@0: {
michael@0:     /*
michael@0:      * If static link is not current scope, clone fun's object to link to the
michael@0:      * current scope via parent. We do this to enable sharing of compiled
michael@0:      * functions among multiple equivalent scopes, amortizing the cost of
michael@0:      * compilation over a number of executions.  Examples include XUL scripts
michael@0:      * and event handlers shared among Firefox or other Mozilla app chrome
michael@0:      * windows, and user-defined JS functions precompiled and then shared among
michael@0:      * requests in server-side JS.
michael@0:      */
michael@0:     RootedFunction fun(cx, funArg);
michael@0:     if (fun->isNative() || fun->environment() != scopeChain) {
michael@0:         fun = CloneFunctionObjectIfNotSingleton(cx, fun, scopeChain, TenuredObject);
michael@0:         if (!fun)
michael@0:             return false;
michael@0:     } else {
michael@0:         JS_ASSERT(script->compileAndGo());
michael@0:         JS_ASSERT(!script->functionNonDelazifying());
michael@0:     }
michael@0: 
michael@0:     /*
michael@0:      * We define the function as a property of the variable object and not the
michael@0:      * current scope chain even for the case of function expression statements
michael@0:      * and functions defined by eval inside let or with blocks.
michael@0:      */
michael@0:     RootedObject parent(cx, scopeChain);
michael@0:     while (!parent->isVarObj())
michael@0:         parent = parent->enclosingScope();
michael@0: 
michael@0:     /* ES5 10.5 (NB: with subsequent errata). */
michael@0:     RootedPropertyName name(cx, fun->atom()->asPropertyName());
michael@0: 
michael@0:     RootedShape shape(cx);
michael@0:     RootedObject pobj(cx);
michael@0:     if (!JSObject::lookupProperty(cx, parent, name, &pobj, &shape))
michael@0:         return false;
michael@0: 
michael@0:     RootedValue rval(cx, ObjectValue(*fun));
michael@0: 
michael@0:     /*
michael@0:      * ECMA requires functions defined when entering Eval code to be
michael@0:      * impermanent.
michael@0:      */
michael@0:     unsigned attrs = script->isActiveEval()
michael@0:                      ? JSPROP_ENUMERATE
michael@0:                      : JSPROP_ENUMERATE | JSPROP_PERMANENT;
michael@0: 
michael@0:     /* Steps 5d, 5f. */
michael@0:     if (!shape || pobj != parent) {
michael@0:         return JSObject::defineProperty(cx, parent, name, rval, JS_PropertyStub,
michael@0:                                         JS_StrictPropertyStub, attrs);
michael@0:     }
michael@0: 
michael@0:     /* Step 5e. */
michael@0:     JS_ASSERT(parent->isNative());
michael@0:     if (parent->is<GlobalObject>()) {
michael@0:         if (shape->configurable()) {
michael@0:             return JSObject::defineProperty(cx, parent, name, rval, JS_PropertyStub,
michael@0:                                             JS_StrictPropertyStub, attrs);
michael@0:         }
michael@0: 
michael@0:         if (shape->isAccessorDescriptor() || !shape->writable() || !shape->enumerable()) {
michael@0:             JSAutoByteString bytes;
michael@0:             if (AtomToPrintableString(cx, name, &bytes)) {
michael@0:                 JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_CANT_REDEFINE_PROP,
michael@0:                                      bytes.ptr());
michael@0:             }
michael@0: 
michael@0:             return false;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /*
michael@0:      * Non-global properties, and global properties which we aren't simply
michael@0:      * redefining, must be set.  First, this preserves their attributes.
michael@0:      * Second, this will produce warnings and/or errors as necessary if the
michael@0:      * specified Call object property is not writable (const).
michael@0:      */
michael@0: 
michael@0:     /* Step 5f. */
michael@0:     return JSObject::setProperty(cx, parent, parent, name, &rval, script->strict());
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::SetCallOperation(JSContext *cx)
michael@0: {
michael@0:     JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_LEFTSIDE_OF_ASS);
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::GetAndClearException(JSContext *cx, MutableHandleValue res)
michael@0: {
michael@0:     bool status = cx->getPendingException(res);
michael@0:     cx->clearPendingException();
michael@0:     if (!status)
michael@0:         return false;
michael@0: 
michael@0:     // Allow interrupting deeply nested exception handling.
michael@0:     return CheckForInterrupt(cx);
michael@0: }
michael@0: 
michael@0: template <bool strict>
michael@0: bool
michael@0: js::SetProperty(JSContext *cx, HandleObject obj, HandleId id, const Value &value)
michael@0: {
michael@0:     RootedValue v(cx, value);
michael@0:     return JSObject::setGeneric(cx, obj, obj, id, &v, strict);
michael@0: }
michael@0: 
michael@0: template bool js::SetProperty<true> (JSContext *cx, HandleObject obj, HandleId id, const Value &value);
michael@0: template bool js::SetProperty<false>(JSContext *cx, HandleObject obj, HandleId id, const Value &value);
michael@0: 
michael@0: template <bool strict>
michael@0: bool
michael@0: js::DeleteProperty(JSContext *cx, HandleValue v, HandlePropertyName name, bool *bp)
michael@0: {
michael@0:     RootedObject obj(cx, ToObjectFromStack(cx, v));
michael@0:     if (!obj)
michael@0:         return false;
michael@0: 
michael@0:     if (!JSObject::deleteProperty(cx, obj, name, bp))
michael@0:         return false;
michael@0: 
michael@0:     if (strict && !*bp) {
michael@0:         obj->reportNotConfigurable(cx, NameToId(name));
michael@0:         return false;
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: template bool js::DeleteProperty<true> (JSContext *cx, HandleValue val, HandlePropertyName name, bool *bp);
michael@0: template bool js::DeleteProperty<false>(JSContext *cx, HandleValue val, HandlePropertyName name, bool *bp);
michael@0: 
michael@0: template <bool strict>
michael@0: bool
michael@0: js::DeleteElement(JSContext *cx, HandleValue val, HandleValue index, bool *bp)
michael@0: {
michael@0:     RootedObject obj(cx, ToObjectFromStack(cx, val));
michael@0:     if (!obj)
michael@0:         return false;
michael@0: 
michael@0:     if (!JSObject::deleteByValue(cx, obj, index, bp))
michael@0:         return false;
michael@0: 
michael@0:     if (strict && !*bp) {
michael@0:         // XXX This observably calls ToString(propval).  We should convert to
michael@0:         //     PropertyKey and use that to delete, and to report an error if
michael@0:         //     necessary!
michael@0:         RootedId id(cx);
michael@0:         if (!ValueToId<CanGC>(cx, index, &id))
michael@0:             return false;
michael@0:         obj->reportNotConfigurable(cx, id);
michael@0:         return false;
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: template bool js::DeleteElement<true> (JSContext *, HandleValue, HandleValue, bool *succeeded);
michael@0: template bool js::DeleteElement<false>(JSContext *, HandleValue, HandleValue, bool *succeeded);
michael@0: 
michael@0: bool
michael@0: js::GetElement(JSContext *cx, MutableHandleValue lref, HandleValue rref, MutableHandleValue vp)
michael@0: {
michael@0:     return GetElementOperation(cx, JSOP_GETELEM, lref, rref, vp);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::CallElement(JSContext *cx, MutableHandleValue lref, HandleValue rref, MutableHandleValue res)
michael@0: {
michael@0:     return GetElementOperation(cx, JSOP_CALLELEM, lref, rref, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::SetObjectElement(JSContext *cx, HandleObject obj, HandleValue index, HandleValue value,
michael@0:                      bool strict)
michael@0: {
michael@0:     RootedId id(cx);
michael@0:     if (!ValueToId<CanGC>(cx, index, &id))
michael@0:         return false;
michael@0:     return SetObjectElementOperation(cx, obj, id, value, strict);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::SetObjectElement(JSContext *cx, HandleObject obj, HandleValue index, HandleValue value,
michael@0:                      bool strict, HandleScript script, jsbytecode *pc)
michael@0: {
michael@0:     JS_ASSERT(pc);
michael@0:     RootedId id(cx);
michael@0:     if (!ValueToId<CanGC>(cx, index, &id))
michael@0:         return false;
michael@0:     return SetObjectElementOperation(cx, obj, id, value, strict, script, pc);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InitElementArray(JSContext *cx, jsbytecode *pc, HandleObject obj, uint32_t index, HandleValue value)
michael@0: {
michael@0:     return InitArrayElemOperation(cx, pc, obj, index, value);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::AddValues(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     return AddOperation(cx, lhs, rhs, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::SubValues(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     return SubOperation(cx, lhs, rhs, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::MulValues(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     return MulOperation(cx, lhs, rhs, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::DivValues(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     return DivOperation(cx, lhs, rhs, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::ModValues(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     return ModOperation(cx, lhs, rhs, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::UrshValues(JSContext *cx, MutableHandleValue lhs, MutableHandleValue rhs, MutableHandleValue res)
michael@0: {
michael@0:     return UrshOperation(cx, lhs, rhs, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::DeleteNameOperation(JSContext *cx, HandlePropertyName name, HandleObject scopeObj,
michael@0:                         MutableHandleValue res)
michael@0: {
michael@0:     RootedObject scope(cx), pobj(cx);
michael@0:     RootedShape shape(cx);
michael@0:     if (!LookupName(cx, name, scopeObj, &scope, &pobj, &shape))
michael@0:         return false;
michael@0: 
michael@0:     if (!scope) {
michael@0:         // Return true for non-existent names.
michael@0:         res.setBoolean(true);
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     bool succeeded;
michael@0:     if (!JSObject::deleteProperty(cx, scope, name, &succeeded))
michael@0:         return false;
michael@0:     res.setBoolean(succeeded);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::ImplicitThisOperation(JSContext *cx, HandleObject scopeObj, HandlePropertyName name,
michael@0:                           MutableHandleValue res)
michael@0: {
michael@0:     RootedObject obj(cx);
michael@0:     if (!LookupNameWithGlobalDefault(cx, name, scopeObj, &obj))
michael@0:         return false;
michael@0: 
michael@0:     return ComputeImplicitThis(cx, obj, res);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::RunOnceScriptPrologue(JSContext *cx, HandleScript script)
michael@0: {
michael@0:     JS_ASSERT(script->treatAsRunOnce());
michael@0: 
michael@0:     if (!script->hasRunOnce()) {
michael@0:         script->setHasRunOnce();
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     // Force instantiation of the script's function's type to ensure the flag
michael@0:     // is preserved in type information.
michael@0:     if (!script->functionNonDelazifying()->getType(cx))
michael@0:         return false;
michael@0: 
michael@0:     types::MarkTypeObjectFlags(cx, script->functionNonDelazifying(),
michael@0:                                types::OBJECT_FLAG_RUNONCE_INVALIDATED);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InitGetterSetterOperation(JSContext *cx, jsbytecode *pc, HandleObject obj, HandleId id,
michael@0:                               HandleObject val)
michael@0: {
michael@0:     JS_ASSERT(val->isCallable());
michael@0:     PropertyOp getter;
michael@0:     StrictPropertyOp setter;
michael@0:     unsigned attrs = JSPROP_ENUMERATE | JSPROP_SHARED;
michael@0: 
michael@0:     JSOp op = JSOp(*pc);
michael@0: 
michael@0:     if (op == JSOP_INITPROP_GETTER || op == JSOP_INITELEM_GETTER) {
michael@0:         getter = CastAsPropertyOp(val);
michael@0:         setter = JS_StrictPropertyStub;
michael@0:         attrs |= JSPROP_GETTER;
michael@0:     } else {
michael@0:         JS_ASSERT(op == JSOP_INITPROP_SETTER || op == JSOP_INITELEM_SETTER);
michael@0:         getter = JS_PropertyStub;
michael@0:         setter = CastAsStrictPropertyOp(val);
michael@0:         attrs |= JSPROP_SETTER;
michael@0:     }
michael@0: 
michael@0:     RootedValue scratch(cx);
michael@0:     return JSObject::defineGeneric(cx, obj, id, scratch, getter, setter, attrs);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InitGetterSetterOperation(JSContext *cx, jsbytecode *pc, HandleObject obj,
michael@0:                               HandlePropertyName name, HandleObject val)
michael@0: {
michael@0:     RootedId id(cx, NameToId(name));
michael@0:     return InitGetterSetterOperation(cx, pc, obj, id, val);
michael@0: }
michael@0: 
michael@0: bool
michael@0: js::InitGetterSetterOperation(JSContext *cx, jsbytecode *pc, HandleObject obj, HandleValue idval,
michael@0:                               HandleObject val)
michael@0: {
michael@0:     RootedId id(cx);
michael@0:     if (!ValueToId<CanGC>(cx, idval, &id))
michael@0:         return false;
michael@0: 
michael@0:     return InitGetterSetterOperation(cx, pc, obj, id, val);
michael@0: }