static bool
ValidateGlobalVariable(JSContext *cx, const AsmJSModule &module, AsmJSModule::Global &global,
HandleValue importVal)
{
JS_ASSERT(global.which() == AsmJSModule::Global::Variable);
void *datum = module.globalVarIndexToGlobalDatum(global.varIndex());
switch (global.varInitKind()) {
case AsmJSModule::Global::InitConstant: {
const Value &v = global.varInitConstant();
switch (global.varInitCoercion()) {
case AsmJS_ToInt32:
*(int32_t *)datum = v.toInt32();
break;
case AsmJS_ToNumber:
*(double *)datum = v.toDouble();
break;
case AsmJS_FRound:
*(float *)datum = static_cast<float>(v.toDouble());
break;
}
break;
}
case AsmJSModule::Global::InitImport: {
RootedPropertyName field(cx, global.varImportField());
RootedValue v(cx);
if (!GetDataProperty(cx, importVal, field, &v))
return false;
switch (global.varInitCoercion()) {
case AsmJS_ToInt32:
if (!ToInt32(cx, v, (int32_t *)datum))
return false;
break;
case AsmJS_ToNumber:
if (!ToNumber(cx, v, (double *)datum))
return false;
break;
case AsmJS_FRound:
if (!RoundFloat32(cx, v, (float *)datum))
return false;
break;
}
break;
}
}
return true;
}
static bool
ValidateGlobalVariable(JSContext *cx, const AsmJSModule &module, AsmJSModule::Global &global,
HandleValue importVal)
{
JS_ASSERT(global.which() == AsmJSModule::Global::Variable);
void *datum = module.globalVarIndexToGlobalDatum(global.varIndex());
switch (global.varInitKind()) {
case AsmJSModule::Global::InitConstant: {
const AsmJSNumLit &lit = global.varInitNumLit();
const Value &v = lit.value();
switch (lit.which()) {
case AsmJSNumLit::Fixnum:
case AsmJSNumLit::NegativeInt:
case AsmJSNumLit::BigUnsigned:
*(int32_t *)datum = v.toInt32();
break;
case AsmJSNumLit::Double:
*(double *)datum = v.toDouble();
break;
case AsmJSNumLit::Float:
*(float *)datum = static_cast<float>(v.toDouble());
break;
case AsmJSNumLit::OutOfRangeInt:
MOZ_MAKE_COMPILER_ASSUME_IS_UNREACHABLE("OutOfRangeInt isn't valid in the first place");
}
break;
}
case AsmJSModule::Global::InitImport: {
RootedPropertyName field(cx, global.varImportField());
RootedValue v(cx);
if (!GetDataProperty(cx, importVal, field, &v))
return false;
if (!v.isPrimitive()) {
// Ideally, we'd reject all non-primitives, but Emscripten has a bug
// that generates code that passes functions for some imports. To
// avoid breaking all the code that contains this bug, we make an
// exception for functions that don't have user-defined valueOf or
// toString, for their coercions are not observable and coercion via
// ToNumber/ToInt32 definitely produces NaN/0. We should remove this
// special case later once most apps have been built with newer
// Emscripten.
jsid toString = NameToId(cx->names().toString);
if (!v.toObject().is<JSFunction>() ||
!HasObjectValueOf(&v.toObject(), cx) ||
!ClassMethodIsNative(cx, &v.toObject(), &JSFunction::class_, toString, fun_toString))
{
return LinkFail(cx, "Imported values must be primitives");
}
}
switch (global.varInitCoercion()) {
case AsmJS_ToInt32:
if (!ToInt32(cx, v, (int32_t *)datum))
return false;
break;
case AsmJS_ToNumber:
if (!ToNumber(cx, v, (double *)datum))
return false;
break;
case AsmJS_FRound:
if (!RoundFloat32(cx, v, (float *)datum))
return false;
break;
}
break;
}
}
return true;
}
