static bool
CloneValue(JSContext *cx, HandleValue selfHostedValue, MutableHandleValue vp)
{
if (selfHostedValue.isObject()) {
RootedObject selfHostedObject(cx, &selfHostedValue.toObject());
JSObject *clone = CloneObject(cx, selfHostedObject);
if (!clone)
return false;
vp.setObject(*clone);
} else if (selfHostedValue.isBoolean() || selfHostedValue.isNumber() || selfHostedValue.isNullOrUndefined()) {
// Nothing to do here: these are represented inline in the value.
vp.set(selfHostedValue);
} else if (selfHostedValue.isString()) {
if (!selfHostedValue.toString()->isFlat())
MOZ_CRASH();
JSFlatString *selfHostedString = &selfHostedValue.toString()->asFlat();
JSString *clone = CloneString(cx, selfHostedString);
if (!clone)
return false;
vp.setString(clone);
} else {
MOZ_CRASH("Self-hosting CloneValue can't clone given value.");
}
return true;
}
static bool
CloneValue(JSContext *cx, HandleValue selfHostedValue, MutableHandleValue vp)
{
if (selfHostedValue.isObject()) {
RootedNativeObject selfHostedObject(cx, &selfHostedValue.toObject().as<NativeObject>());
JSObject *clone = CloneObject(cx, selfHostedObject);
if (!clone)
return false;
vp.setObject(*clone);
} else if (selfHostedValue.isBoolean() || selfHostedValue.isNumber() || selfHostedValue.isNullOrUndefined()) {
// Nothing to do here: these are represented inline in the value.
vp.set(selfHostedValue);
} else if (selfHostedValue.isString()) {
if (!selfHostedValue.toString()->isFlat())
MOZ_CRASH();
JSFlatString *selfHostedString = &selfHostedValue.toString()->asFlat();
JSString *clone = CloneString(cx, selfHostedString);
if (!clone)
return false;
vp.setString(clone);
} else if (selfHostedValue.isSymbol()) {
// Well-known symbols are shared.
mozilla::DebugOnly<JS::Symbol *> sym = selfHostedValue.toSymbol();
MOZ_ASSERT(sym->isWellKnownSymbol());
MOZ_ASSERT(cx->wellKnownSymbols().get(size_t(sym->code())) == sym);
vp.set(selfHostedValue);
} else {
MOZ_CRASH("Self-hosting CloneValue can't clone given value.");
}
return true;
}
static bool
CompareMaybeStringsPar(ForkJoinContext *cx, HandleValue v1, HandleValue v2, int32_t *res)
{
if (!v1.isString())
return false;
if (!v2.isString())
return false;
return CompareStringsPar(cx, v1.toString(), v2.toString(), res);
}
static ParallelResult
CompareMaybeStringsPar(ForkJoinSlice *slice, HandleValue v1, HandleValue v2, int32_t *res)
{
if (!v1.isString())
return TP_RETRY_SEQUENTIALLY;
if (!v2.isString())
return TP_RETRY_SEQUENTIALLY;
return CompareStringsPar(slice, v1.toString(), v2.toString(), res);
}
bool
HashableValue::setValue(JSContext* cx, HandleValue v)
{
if (v.isString()) {
// Atomize so that hash() and operator==() are fast and infallible.
JSString* str = AtomizeString(cx, v.toString(), DoNotPinAtom);
if (!str)
return false;
value = StringValue(str);
} else if (v.isDouble()) {
double d = v.toDouble();
int32_t i;
if (NumberEqualsInt32(d, &i)) {
// Normalize int32_t-valued doubles to int32_t for faster hashing and testing.
value = Int32Value(i);
} else if (IsNaN(d)) {
// NaNs with different bits must hash and test identically.
value = DoubleNaNValue();
} else {
value = v;
}
} else {
value = v;
}
MOZ_ASSERT(value.isUndefined() || value.isNull() || value.isBoolean() || value.isNumber() ||
value.isString() || value.isSymbol() || value.isObject());
return true;
}
js::ToBooleanSlow(HandleValue v)
{
if (v.isString())
return v.toString()->length() != 0;
JS_ASSERT(v.isObject());
return !EmulatesUndefined(&v.toObject());
}
Node::Node(HandleValue value)
{
if (value.isObject())
construct(&value.toObject());
else if (value.isString())
construct(value.toString());
else if (value.isSymbol())
construct(value.toSymbol());
else
construct<void>(nullptr);
}
bool
js::DirectEvalValueFromIon(JSContext *cx,
HandleObject scopeobj, HandleScript callerScript,
HandleValue thisValue, HandleValue evalArg,
jsbytecode *pc, MutableHandleValue vp)
{
// Act as identity on non-strings per ES5 15.1.2.1 step 1.
if (!evalArg.isString()) {
vp.set(evalArg);
return true;
}
RootedString string(cx, evalArg.toString());
return DirectEvalStringFromIon(cx, scopeobj, callerScript, thisValue, string, pc, vp);
}
// Common code implementing direct and indirect eval.
//
// Evaluate call.argv[2], if it is a string, in the context of the given calling
// frame, with the provided scope chain, with the semantics of either a direct
// or indirect eval (see ES5 10.4.2). If this is an indirect eval, scopeobj
// must be a global object.
//
// On success, store the completion value in call.rval and return true.
static bool
EvalKernel(JSContext* cx, HandleValue v, EvalType evalType, AbstractFramePtr caller,
HandleObject scopeobj, jsbytecode* pc, MutableHandleValue vp)
{
MOZ_ASSERT((evalType == INDIRECT_EVAL) == !caller);
MOZ_ASSERT((evalType == INDIRECT_EVAL) == !pc);
MOZ_ASSERT_IF(evalType == INDIRECT_EVAL, IsGlobalLexicalScope(scopeobj));
AssertInnerizedScopeChain(cx, *scopeobj);
Rooted<GlobalObject*> scopeObjGlobal(cx, &scopeobj->global());
if (!GlobalObject::isRuntimeCodeGenEnabled(cx, scopeObjGlobal)) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_CSP_BLOCKED_EVAL);
return false;
}
// ES5 15.1.2.1 step 1.
if (!v.isString()) {
vp.set(v);
return true;
}
RootedString str(cx, v.toString());
// ES5 15.1.2.1 steps 2-8.
// Per ES5, indirect eval runs in the global scope. (eval is specified this
// way so that the compiler can make assumptions about what bindings may or
// may not exist in the current frame if it doesn't see 'eval'.)
MOZ_ASSERT_IF(evalType != DIRECT_EVAL,
cx->global() == &scopeobj->as<ClonedBlockObject>().global());
RootedLinearString linearStr(cx, str->ensureLinear(cx));
if (!linearStr)
return false;
RootedScript callerScript(cx, caller ? caller.script() : nullptr);
EvalJSONResult ejr = TryEvalJSON(cx, linearStr, vp);
if (ejr != EvalJSON_NotJSON)
return ejr == EvalJSON_Success;
EvalScriptGuard esg(cx);
if (evalType == DIRECT_EVAL && caller.isFunctionFrame())
esg.lookupInEvalCache(linearStr, callerScript, pc);
if (!esg.foundScript()) {
RootedScript maybeScript(cx);
unsigned lineno;
const char* filename;
bool mutedErrors;
uint32_t pcOffset;
DescribeScriptedCallerForCompilation(cx, &maybeScript, &filename, &lineno, &pcOffset,
&mutedErrors,
evalType == DIRECT_EVAL
? CALLED_FROM_JSOP_EVAL
: NOT_CALLED_FROM_JSOP_EVAL);
const char* introducerFilename = filename;
if (maybeScript && maybeScript->scriptSource()->introducerFilename())
introducerFilename = maybeScript->scriptSource()->introducerFilename();
RootedObject enclosing(cx);
if (evalType == DIRECT_EVAL)
enclosing = callerScript->innermostStaticScope(pc);
else
enclosing = &cx->global()->lexicalScope().staticBlock();
Rooted<StaticEvalScope*> staticScope(cx, StaticEvalScope::create(cx, enclosing));
if (!staticScope)
return false;
CompileOptions options(cx);
options.setIsRunOnce(true)
.setForEval(true)
.setNoScriptRval(false)
.setMutedErrors(mutedErrors)
.maybeMakeStrictMode(evalType == DIRECT_EVAL && IsStrictEvalPC(pc));
if (introducerFilename) {
options.setFileAndLine(filename, 1);
options.setIntroductionInfo(introducerFilename, "eval", lineno, maybeScript, pcOffset);
} else {
options.setFileAndLine("eval", 1);
options.setIntroductionType("eval");
}
AutoStableStringChars linearChars(cx);
if (!linearChars.initTwoByte(cx, linearStr))
return false;
const char16_t* chars = linearChars.twoByteRange().start().get();
SourceBufferHolder::Ownership ownership = linearChars.maybeGiveOwnershipToCaller()
? SourceBufferHolder::GiveOwnership
: SourceBufferHolder::NoOwnership;
SourceBufferHolder srcBuf(chars, linearStr->length(), ownership);
JSScript* compiled = frontend::CompileScript(cx, &cx->tempLifoAlloc(),
scopeobj, staticScope, callerScript,
options, srcBuf, linearStr);
if (!compiled)
return false;
if (compiled->strict())
staticScope->setStrict();
esg.setNewScript(compiled);
}
// Look up the newTarget from the frame iterator.
Value newTargetVal = NullValue();
return ExecuteKernel(cx, esg.script(), *scopeobj, newTargetVal,
NullFramePtr() /* evalInFrame */, vp.address());
}