/work/obj-fuzz/dom/bindings/BlobBinding.cpp

Source (jump to first uncovered line)
/* THIS FILE IS AUTOGENERATED FROM Blob.webidl BY Codegen.py - DO NOT EDIT */

#include "AtomList.h"
#include "BlobBinding.h"
#include "WrapperFactory.h"
#include "jsapi.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/Blob.h"
#include "mozilla/dom/DOMJSClass.h"
#include "mozilla/dom/NonRefcountedDOMObject.h"
#include "mozilla/dom/PrimitiveConversions.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/SimpleGlobalObject.h"
#include "mozilla/dom/UnionConversions.h"
#include "mozilla/dom/XrayExpandoClass.h"

namespace mozilla {
namespace dom {

namespace binding_detail {}; // Just to make sure it's known as a namespace
using namespace mozilla::dom::binding_detail;


namespace EndingTypesValues {
extern const EnumEntry strings[3] = {
  {"transparent", 11},
  {"native", 6},
  { nullptr, 0 }
};
} // namespace EndingTypesValues

bool
ToJSValue(JSContext* aCx, EndingTypes aArgument, JS::MutableHandle<JS::Value> aValue)
{
  MOZ_ASSERT(uint32_t(aArgument) < ArrayLength(EndingTypesValues::strings));
  JSString* resultStr =
    JS_NewStringCopyN(aCx, EndingTypesValues::strings[uint32_t(aArgument)].value,
                      EndingTypesValues::strings[uint32_t(aArgument)].length);
  if (!resultStr) {
    return false;
  }
  aValue.setString(resultStr);
  return true;
}


void
ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback, OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString& aUnion, const char* aName, uint32_t aFlags)
{
  if (aUnion.IsBlob()) {
    ImplCycleCollectionTraverse(aCallback, aUnion.GetAsBlob(), "mBlob", aFlags);
  }
}


void
ImplCycleCollectionUnlink(OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString& aUnion)
{
  aUnion.Uninit();
}


bool
ArrayBufferViewOrArrayBufferOrBlobOrUSVString::ToJSVal(JSContext* cx, JS::Handle<JSObject*> scopeObj, JS::MutableHandle<JS::Value> rval) const
{
  switch (mType) {
    case eUninitialized: {
      return false;
      break;
    }
    case eArrayBufferView: {
      rval.setObject(*mValue.mArrayBufferView.Value().Obj());
      if (!MaybeWrapNonDOMObjectValue(cx, rval)) {
        return false;
      }
      return true;
      break;
    }
    case eArrayBuffer: {
      rval.setObject(*mValue.mArrayBuffer.Value().Obj());
      if (!MaybeWrapNonDOMObjectValue(cx, rval)) {
        return false;
      }
      return true;
      break;
    }
    case eBlob: {
      if (!GetOrCreateDOMReflector(cx, mValue.mBlob.Value(), rval)) {
        MOZ_ASSERT(JS_IsExceptionPending(cx));
        return false;
      }
      return true;
      break;
    }
    case eUSVString: {
      if (!xpc::NonVoidStringToJsval(cx, mValue.mUSVString.Value(), rval)) {
        return false;
      }
      return true;
      break;
    }
    default: {
      return false;
      break;
    }
  }

  return false;
}


ArrayBufferView&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::RawSetAsArrayBufferView()
{
  if (mType == eArrayBufferView) {
    return mValue.mArrayBufferView.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eArrayBufferView;
  return mValue.mArrayBufferView.SetValue();
}

ArrayBufferView&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::SetAsArrayBufferView()
{
  if (mType == eArrayBufferView) {
    return mValue.mArrayBufferView.Value();
  }
  Uninit();
  mType = eArrayBufferView;
  return mValue.mArrayBufferView.SetValue();
}

bool
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::TrySetToArrayBufferView(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    ArrayBufferView& memberSlot = RawSetAsArrayBufferView();
    if (!memberSlot.Init(&value.toObject())) {
      DestroyArrayBufferView();
      tryNext = true;
      return true;
    }
  }
  return true;
}

void
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::DestroyArrayBufferView()
{
  MOZ_ASSERT(IsArrayBufferView(), "Wrong type!");
  mValue.mArrayBufferView.Destroy();
  mType = eUninitialized;
}




ArrayBuffer&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::RawSetAsArrayBuffer()
{
  if (mType == eArrayBuffer) {
    return mValue.mArrayBuffer.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eArrayBuffer;
  return mValue.mArrayBuffer.SetValue();
}

ArrayBuffer&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::SetAsArrayBuffer()
{
  if (mType == eArrayBuffer) {
    return mValue.mArrayBuffer.Value();
  }
  Uninit();
  mType = eArrayBuffer;
  return mValue.mArrayBuffer.SetValue();
}

bool
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::TrySetToArrayBuffer(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    ArrayBuffer& memberSlot = RawSetAsArrayBuffer();
    if (!memberSlot.Init(&value.toObject())) {
      DestroyArrayBuffer();
      tryNext = true;
      return true;
    }
  }
  return true;
}

void
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::DestroyArrayBuffer()
{
  MOZ_ASSERT(IsArrayBuffer(), "Wrong type!");
  mValue.mArrayBuffer.Destroy();
  mType = eUninitialized;
}




OwningNonNull<mozilla::dom::Blob>&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::RawSetAsBlob()
{
  if (mType == eBlob) {
    return mValue.mBlob.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eBlob;
  return mValue.mBlob.SetValue();
}

OwningNonNull<mozilla::dom::Blob>&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::SetAsBlob()
{
  if (mType == eBlob) {
    return mValue.mBlob.Value();
  }
  Uninit();
  mType = eBlob;
  return mValue.mBlob.SetValue();
}

bool
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::TrySetToBlob(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    OwningNonNull<mozilla::dom::Blob>& memberSlot = RawSetAsBlob();
    static_assert(IsRefcounted<mozilla::dom::Blob>::value, "We can only store refcounted classes.");{
      nsresult rv = UnwrapObject<prototypes::id::Blob, mozilla::dom::Blob>(value, memberSlot);
      if (NS_FAILED(rv)) {
        DestroyBlob();
        tryNext = true;
        return true;
      }
    }
  }
  return true;
}

void
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::DestroyBlob()
{
  MOZ_ASSERT(IsBlob(), "Wrong type!");
  mValue.mBlob.Destroy();
  mType = eUninitialized;
}




nsString&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::RawSetAsUSVString()
{
  if (mType == eUSVString) {
    return mValue.mUSVString.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eUSVString;
  return mValue.mUSVString.SetValue();
}

nsString&
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::SetAsUSVString()
{
  if (mType == eUSVString) {
    return mValue.mUSVString.Value();
  }
  Uninit();
  mType = eUSVString;
  return mValue.mUSVString.SetValue();
}

bool
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::TrySetToUSVString(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    nsString& memberSlot = RawSetAsUSVString();
    if (!ConvertJSValueToString(cx, value, eStringify, eStringify, memberSlot)) {
      return false;
    }
    NormalizeUSVString(memberSlot);
  }
  return true;
}


void
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::DestroyUSVString()
{
  MOZ_ASSERT(IsUSVString(), "Wrong type!");
  mValue.mUSVString.Destroy();
  mType = eUninitialized;
}




void
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::Uninit()
{
  switch (mType) {
    case eUninitialized: {
      break;
    }
    case eArrayBufferView: {
      DestroyArrayBufferView();
      break;
    }
    case eArrayBuffer: {
      DestroyArrayBuffer();
      break;
    }
    case eBlob: {
      DestroyBlob();
      break;
    }
    case eUSVString: {
      DestroyUSVString();
      break;
    }
  }
}

bool
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::ToJSVal(JSContext* cx, JS::Handle<JSObject*> scopeObj, JS::MutableHandle<JS::Value> rval) const
{
  switch (mType) {
    case eUninitialized: {
      return false;
      break;
    }
    case eArrayBufferView: {
      rval.setObject(*mValue.mArrayBufferView.Value().Obj());
      if (!MaybeWrapNonDOMObjectValue(cx, rval)) {
        return false;
      }
      return true;
      break;
    }
    case eArrayBuffer: {
      rval.setObject(*mValue.mArrayBuffer.Value().Obj());
      if (!MaybeWrapNonDOMObjectValue(cx, rval)) {
        return false;
      }
      return true;
      break;
    }
    case eBlob: {
      if (!GetOrCreateDOMReflector(cx, mValue.mBlob.Value(), rval)) {
        MOZ_ASSERT(JS_IsExceptionPending(cx));
        return false;
      }
      return true;
      break;
    }
    case eUSVString: {
      if (!xpc::NonVoidStringToJsval(cx, mValue.mUSVString.Value(), rval)) {
        return false;
      }
      return true;
      break;
    }
    default: {
      return false;
      break;
    }
  }

  return false;
}

void
OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString::TraceUnion(JSTracer* trc)
{
  switch (mType) {
    case eArrayBufferView: {
      mValue.mArrayBufferView.Value().TraceSelf(trc);
      break;
    }
    case eArrayBuffer: {
      mValue.mArrayBuffer.Value().TraceSelf(trc);
      break;
    }
    default: {
      break;
    }
  }
}



BlobPropertyBag::BlobPropertyBag()
{
  // Safe to pass a null context if we pass a null value
  Init(nullptr, JS::NullHandleValue);
}



bool
BlobPropertyBag::InitIds(JSContext* cx, BlobPropertyBagAtoms* atomsCache)
{
  MOZ_ASSERT(!*reinterpret_cast<jsid**>(atomsCache));

  // Initialize these in reverse order so that any failure leaves the first one
  // uninitialized.
  if (!atomsCache->type_id.init(cx, "type") ||
      !atomsCache->endings_id.init(cx, "endings")) {
    return false;
  }
  return true;
}

bool
BlobPropertyBag::Init(JSContext* cx, JS::Handle<JS::Value> val, const char* sourceDescription, bool passedToJSImpl)
{
  // Passing a null JSContext is OK only if we're initing from null,
  // Since in that case we will not have to do any property gets
  // Also evaluate isNullOrUndefined in order to avoid false-positive
  // checkers by static analysis tools
  MOZ_ASSERT_IF(!cx, val.isNull() && val.isNullOrUndefined());
  BlobPropertyBagAtoms* atomsCache = nullptr;
  if (cx) {
    atomsCache = GetAtomCache<BlobPropertyBagAtoms>(cx);
    if (!*reinterpret_cast<jsid**>(atomsCache) && !InitIds(cx, atomsCache)) {
      return false;
    }
  }

  if (!IsConvertibleToDictionary(val)) {
    return ThrowErrorMessage(cx, MSG_NOT_DICTIONARY, sourceDescription);
  }

  bool isNull = val.isNullOrUndefined();
  // We only need these if !isNull, in which case we have |cx|.
  Maybe<JS::Rooted<JSObject *> > object;
  Maybe<JS::Rooted<JS::Value> > temp;
  if (!isNull) {
    MOZ_ASSERT(cx);
    object.emplace(cx, &val.toObject());
    temp.emplace(cx);
  }
  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->endings_id, temp.ptr())) {
      return false;
    }
  }
  if (!isNull && !temp->isUndefined()) {
    {
      int index;
      if (!FindEnumStringIndex<true>(cx, temp.ref(), EndingTypesValues::strings, "EndingTypes", "'endings' member of BlobPropertyBag", &index)) {
        return false;
      }
      MOZ_ASSERT(index >= 0);
      mEndings = static_cast<EndingTypes>(index);
    }
  } else {
    mEndings = EndingTypes::Transparent;
  }
  mIsAnyMemberPresent = true;

  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->type_id, temp.ptr())) {
      return false;
    }
  }
  if (!isNull && !temp->isUndefined()) {
    if (!ConvertJSValueToString(cx, temp.ref(), eStringify, eStringify, mType)) {
      return false;
    }
  } else {
    static const char16_t data[] = { 0 };
    mType.Rebind(data, ArrayLength(data) - 1);
  }
  mIsAnyMemberPresent = true;
  return true;
}

bool
BlobPropertyBag::Init(const nsAString& aJSON)
{
  AutoJSAPI jsapi;
  JSObject* cleanGlobal = SimpleGlobalObject::Create(SimpleGlobalObject::GlobalType::BindingDetail);
  if (!cleanGlobal) {
    return false;
  }
  if (!jsapi.Init(cleanGlobal)) {
    return false;
  }
  JSContext* cx = jsapi.cx();
  JS::Rooted<JS::Value> json(cx);
  bool ok = ParseJSON(cx, aJSON, &json);
  NS_ENSURE_TRUE(ok, false);
  return Init(cx, json);
}

bool
BlobPropertyBag::ToObjectInternal(JSContext* cx, JS::MutableHandle<JS::Value> rval) const
{
  BlobPropertyBagAtoms* atomsCache = GetAtomCache<BlobPropertyBagAtoms>(cx);
  if (!*reinterpret_cast<jsid**>(atomsCache) && !InitIds(cx, atomsCache)) {
    return false;
  }

  JS::Rooted<JSObject*> obj(cx, JS_NewPlainObject(cx));
  if (!obj) {
    return false;
  }
  rval.set(JS::ObjectValue(*obj));

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    EndingTypes const & currentValue = mEndings;
    if (!ToJSValue(cx, currentValue, &temp)) {
      return false;
    }
    if (!JS_DefinePropertyById(cx, obj, atomsCache->endings_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    nsString const & currentValue = mType;
    if (!xpc::NonVoidStringToJsval(cx, currentValue, &temp)) {
      return false;
    }
    if (!JS_DefinePropertyById(cx, obj, atomsCache->type_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  return true;
}

bool
BlobPropertyBag::ToJSON(nsAString& aJSON) const
{
  AutoJSAPI jsapi;
  jsapi.Init();
  JSContext *cx = jsapi.cx();
  // It's safe to use UnprivilegedJunkScopeOrWorkerGlobal here
  // because we'll only be creating objects, in ways that have no
  // side-effects, followed by a call to JS::ToJSONMaybeSafely,
  // which likewise guarantees no side-effects for the sorts of
  // things we will pass it.
  JSAutoRealm ar(cx, UnprivilegedJunkScopeOrWorkerGlobal());
  JS::Rooted<JS::Value> val(cx);
  if (!ToObjectInternal(cx, &val)) {
    return false;
  }
  JS::Rooted<JSObject*> obj(cx, &val.toObject());
  return StringifyToJSON(cx, obj, aJSON);
}

void
BlobPropertyBag::TraceDictionary(JSTracer* trc)
{
}

BlobPropertyBag&
BlobPropertyBag::operator=(const BlobPropertyBag& aOther)
{
  DictionaryBase::operator=(aOther);
  mEndings = aOther.mEndings;
  mType = aOther.mType;
  return *this;
}

namespace binding_detail {
} // namespace binding_detail


namespace Blob_Binding {

MOZ_CAN_RUN_SCRIPT static bool
get_size(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::Blob* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get Blob.size", DOM, cx);

  FastErrorResult rv;
  uint64_t result(self->GetSize(rv));
  if (MOZ_UNLIKELY(rv.MaybeSetPendingException(cx))) {
    return false;
  }
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  args.rval().set(JS_NumberValue(double(result)));
  return true;
}

static const JSJitInfo size_getterinfo = {
  { (JSJitGetterOp)get_size },
  { prototypes::id::Blob },
  { PrototypeTraits<prototypes::id::Blob>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_DOUBLE,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 1, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
get_type(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::Blob* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get Blob.type", DOM, cx);

  DOMString result;
  self->GetType(result);
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  if (!xpc::NonVoidStringToJsval(cx, result, args.rval())) {
    return false;
  }
  return true;
}

static const JSJitInfo type_getterinfo = {
  { (JSJitGetterOp)get_type },
  { prototypes::id::Blob },
  { PrototypeTraits<prototypes::id::Blob>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_STRING,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 1, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
slice(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::Blob* self, const JSJitMethodCallArgs& args)
{
  AUTO_PROFILER_LABEL_FAST("Blob.slice", DOM, cx);

  Optional<int64_t> arg0;
  if (args.hasDefined(0)) {
    arg0.Construct();
    if (!ValueToPrimitive<int64_t, eClamp>(cx, args[0], &arg0.Value())) {
      return false;
    }
  }
  Optional<int64_t> arg1;
  if (args.hasDefined(1)) {
    arg1.Construct();
    if (!ValueToPrimitive<int64_t, eClamp>(cx, args[1], &arg1.Value())) {
      return false;
    }
  }
  Optional<nsAString> arg2;
  binding_detail::FakeString arg2_holder;
  if (args.hasDefined(2)) {
    if (!ConvertJSValueToString(cx, args[2], eStringify, eStringify, arg2_holder)) {
      return false;
    }
    arg2 = &arg2_holder;
  }
  FastErrorResult rv;
  auto result(StrongOrRawPtr<mozilla::dom::Blob>(self->Slice(Constify(arg0), Constify(arg1), NonNullHelper(Constify(arg2)), rv)));
  if (MOZ_UNLIKELY(rv.MaybeSetPendingException(cx))) {
    return false;
  }
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  if (!GetOrCreateDOMReflector(cx, result, args.rval())) {
    MOZ_ASSERT(JS_IsExceptionPending(cx));
    return false;
  }
  return true;
}

static const JSJitInfo slice_methodinfo = {
  { (JSJitGetterOp)slice },
  { prototypes::id::Blob },
  { PrototypeTraits<prototypes::id::Blob>::Depth },
  JSJitInfo::Method,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_OBJECT,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 1, "There is no slot for us");

static bool
_addProperty(JSContext* cx, JS::Handle<JSObject*> obj, JS::Handle<jsid> id, JS::Handle<JS::Value> val)
{
  mozilla::dom::Blob* self = UnwrapPossiblyNotInitializedDOMObject<mozilla::dom::Blob>(obj);
  // We don't want to preserve if we don't have a wrapper, and we
  // obviously can't preserve if we're not initialized.
  if (self && self->GetWrapperPreserveColor()) {
    PreserveWrapper(self);
  }
  return true;
}

static void
_finalize(js::FreeOp* fop, JSObject* obj)
{
  mozilla::dom::Blob* self = UnwrapPossiblyNotInitializedDOMObject<mozilla::dom::Blob>(obj);
  if (self) {
    ClearWrapper(self, self, obj);
    AddForDeferredFinalization<mozilla::dom::Blob>(self);
  }
}

static size_t
_objectMoved(JSObject* obj, JSObject* old)
{
  mozilla::dom::Blob* self = UnwrapPossiblyNotInitializedDOMObject<mozilla::dom::Blob>(obj);
  if (self) {
    UpdateWrapper(self, self, obj, old);
  }

  return 0;
}

// We deliberately use brace-elision to make Visual Studio produce better initalization code.
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-braces"
#endif
static const JSFunctionSpec sMethods_specs[] = {
  JS_FNSPEC("slice", (GenericMethod<NormalThisPolicy, ThrowExceptions>), reinterpret_cast<const JSJitInfo*>(&slice_methodinfo), 0, JSPROP_ENUMERATE, nullptr),
  JS_FS_END
};
#if defined(__clang__)
#pragma clang diagnostic pop
#endif


static const Prefable<const JSFunctionSpec> sMethods[] = {
  { nullptr, &sMethods_specs[0] },
  { nullptr, nullptr }
};

static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_PREF_INDEX,
    "We have a prefable index that is >= (1 << NUM_BITS_PROPERTY_INFO_PREF_INDEX)");
static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_SPEC_INDEX,
    "We have a spec index that is >= (1 << NUM_BITS_PROPERTY_INFO_SPEC_INDEX)");

// We deliberately use brace-elision to make Visual Studio produce better initalization code.
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-braces"
#endif
static const JSPropertySpec sAttributes_specs[] = {
  { "size", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &size_getterinfo, nullptr, nullptr },
  { "type", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &type_getterinfo, nullptr, nullptr },
  { nullptr, 0, nullptr, nullptr, nullptr, nullptr }
};
#if defined(__clang__)
#pragma clang diagnostic pop
#endif


static const Prefable<const JSPropertySpec> sAttributes[] = {
  { nullptr, &sAttributes_specs[0] },
  { nullptr, nullptr }
};

static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_PREF_INDEX,
    "We have a prefable index that is >= (1 << NUM_BITS_PROPERTY_INFO_PREF_INDEX)");
static_assert(2 <= 1ull << NUM_BITS_PROPERTY_INFO_SPEC_INDEX,
    "We have a spec index that is >= (1 << NUM_BITS_PROPERTY_INFO_SPEC_INDEX)");


static uint16_t sNativeProperties_sortedPropertyIndices[3];
static PropertyInfo sNativeProperties_propertyInfos[3];

static const NativePropertiesN<2> sNativeProperties = {
  false, 0,
  false, 0,
  true,  0 /* sMethods */,
  true,  1 /* sAttributes */,
  false, 0,
  false, 0,
  false, 0,
  -1,
  3,
  sNativeProperties_sortedPropertyIndices,
  {
    { sMethods, &sNativeProperties_propertyInfos[0] },
    { sAttributes, &sNativeProperties_propertyInfos[1] }
  }
};
static_assert(3 < 1ull << CHAR_BIT * sizeof(sNativeProperties.propertyInfoCount),
    "We have a property info count that is oversized");

static bool
_constructor(JSContext* cx, unsigned argc, JS::Value* vp)
{
  AUTO_PROFILER_LABEL_FAST("Blob constructor", DOM, cx);

  JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
  JS::Rooted<JSObject*> obj(cx, &args.callee());
  if (!args.isConstructing()) {
    // XXXbz wish I could get the name from the callee instead of
    // Adding more relocations
    return ThrowConstructorWithoutNew(cx, "Blob");
  }

  JS::Rooted<JSObject*> desiredProto(cx);
  if (!GetDesiredProto(cx, args, &desiredProto)) {
    return false;
  }

  GlobalObject global(cx, obj);
  if (global.Failed()) {
    return false;
  }

  bool objIsXray = xpc::WrapperFactory::IsXrayWrapper(obj);
  Optional<Sequence<OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString>> arg0;
  Maybe<SequenceRooter<OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString>> arg0_holder;
  if (args.hasDefined(0)) {
    arg0.Construct();
    arg0_holder.emplace(cx, &arg0.Value());
    if (args[0].isObject()) {
      JS::ForOfIterator iter(cx);
      if (!iter.init(args[0], JS::ForOfIterator::AllowNonIterable)) {
        return false;
      }
      if (!iter.valueIsIterable()) {
        ThrowErrorMessage(cx, MSG_NOT_SEQUENCE, "Argument 1 of Blob.constructor");
        return false;
      }
      Sequence<OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString> &arr = arg0.Value();
      JS::Rooted<JS::Value> temp(cx);
      while (true) {
        bool done;
        if (!iter.next(&temp, &done)) {
          return false;
        }
        if (done) {
          break;
        }
        OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString* slotPtr = arr.AppendElement(mozilla::fallible);
        if (!slotPtr) {
          JS_ReportOutOfMemory(cx);
          return false;
        }
        OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString& slot = *slotPtr;
        {
          bool done = false, failed = false, tryNext;
          if (temp.isObject()) {
            done = (failed = !slot.TrySetToArrayBufferView(cx, temp, tryNext, false)) || !tryNext ||
                   (failed = !slot.TrySetToArrayBuffer(cx, temp, tryNext, false)) || !tryNext ||
                   (failed = !slot.TrySetToBlob(cx, temp, tryNext, false)) || !tryNext;

          }
          if (!done) {
            do {
              done = (failed = !slot.TrySetToUSVString(cx, temp, tryNext)) || !tryNext;
              break;
            } while (false);
          }
          if (failed) {
            return false;
          }
          if (!done) {
            ThrowErrorMessage(cx, MSG_NOT_IN_UNION, "Element of argument 1 of Blob.constructor", "ArrayBufferView, ArrayBuffer, Blob");
            return false;
          }
        }
      }
    } else {
      ThrowErrorMessage(cx, MSG_NOT_SEQUENCE, "Argument 1 of Blob.constructor");
      return false;
    }
  }
  binding_detail::FastBlobPropertyBag arg1;
  if (!arg1.Init(cx, (args.hasDefined(1)) ? args[1] : JS::NullHandleValue,  "Argument 2 of Blob.constructor", false)) {
    return false;
  }
  Maybe<JSAutoRealm> ar;
  if (objIsXray) {
    obj = js::CheckedUnwrap(obj);
    if (!obj) {
      return false;
    }
    ar.emplace(cx, obj);
    if (!JS_WrapObject(cx, &desiredProto)) {
      return false;
    }
    if (arg0.WasPassed()) {
      for (uint32_t indexName0 = 0; indexName0 < arg0.Value().Length(); ++indexName0) {
        if (arg0.Value()[indexName0].IsArrayBufferView()) {
          if (!arg0.Value()[indexName0].GetAsArrayBufferView().WrapIntoNewCompartment(cx)) {
            return false;
          }
        }
        else if (arg0.Value()[indexName0].IsArrayBuffer()) {
          if (!arg0.Value()[indexName0].GetAsArrayBuffer().WrapIntoNewCompartment(cx)) {
            return false;
          }
        }
      }
    }
  }
  FastErrorResult rv;
  auto result(StrongOrRawPtr<mozilla::dom::Blob>(mozilla::dom::Blob::Constructor(global, Constify(arg0), Constify(arg1), rv)));
  if (MOZ_UNLIKELY(rv.MaybeSetPendingException(cx))) {
    return false;
  }
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  static_assert(!IsPointer<decltype(result)>::value,
                "NewObject implies that we need to keep the object alive with a strong reference.");
  if (!GetOrCreateDOMReflector(cx, result, args.rval(), desiredProto)) {
    MOZ_ASSERT(JS_IsExceptionPending(cx));
    return false;
  }
  return true;
}

static const js::ClassOps sInterfaceObjectClassOps = {
    nullptr,               /* addProperty */
    nullptr,               /* delProperty */
    nullptr,               /* enumerate */
    nullptr,               /* newEnumerate */
    nullptr,               /* resolve */
    nullptr,               /* mayResolve */
    nullptr,               /* finalize */
    _constructor, /* call */
    nullptr,               /* hasInstance */
    _constructor, /* construct */
    nullptr,               /* trace */
};

static const DOMIfaceAndProtoJSClass sInterfaceObjectClass = {
  {
    "Function",
    JSCLASS_IS_DOMIFACEANDPROTOJSCLASS | JSCLASS_HAS_RESERVED_SLOTS(DOM_INTERFACE_SLOTS_BASE),
    &sInterfaceObjectClassOps,
    JS_NULL_CLASS_SPEC,
    JS_NULL_CLASS_EXT,
    &sInterfaceObjectClassObjectOps
  },
  eInterface,
  true,
  prototypes::id::Blob,
  PrototypeTraits<prototypes::id::Blob>::Depth,
  sNativePropertyHooks,
  "function Blob() {\n    [native code]\n}",
  JS::GetRealmFunctionPrototype
};

static const DOMIfaceAndProtoJSClass sPrototypeClass = {
  {
    "BlobPrototype",
    JSCLASS_IS_DOMIFACEANDPROTOJSCLASS | JSCLASS_HAS_RESERVED_SLOTS(DOM_INTERFACE_PROTO_SLOTS_BASE),
    JS_NULL_CLASS_OPS,
    JS_NULL_CLASS_SPEC,
    JS_NULL_CLASS_EXT,
    JS_NULL_OBJECT_OPS
  },
  eInterfacePrototype,
  false,
  prototypes::id::Blob,
  PrototypeTraits<prototypes::id::Blob>::Depth,
  sNativePropertyHooks,
  "[object BlobPrototype]",
  JS::GetRealmObjectPrototype
};

static const js::ClassOps sClassOps = {
  _addProperty, /* addProperty */
  nullptr,               /* delProperty */
  nullptr,               /* enumerate */
  nullptr, /* newEnumerate */
  nullptr, /* resolve */
  nullptr, /* mayResolve */
  _finalize, /* finalize */
  nullptr, /* call */
  nullptr,               /* hasInstance */
  nullptr,               /* construct */
  nullptr, /* trace */
};

static const js::ClassExtension sClassExtension = {
  nullptr, /* weakmapKeyDelegateOp */
  _objectMoved /* objectMovedOp */
};

static const DOMJSClass sClass = {
  { "Blob",
    JSCLASS_IS_DOMJSCLASS | JSCLASS_FOREGROUND_FINALIZE | JSCLASS_HAS_RESERVED_SLOTS(1),
    &sClassOps,
    JS_NULL_CLASS_SPEC,
    &sClassExtension,
    JS_NULL_OBJECT_OPS
  },
  { prototypes::id::Blob, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count },
  IsBaseOf<nsISupports, mozilla::dom::Blob >::value,
  sNativePropertyHooks,
  FindAssociatedGlobalForNative<mozilla::dom::Blob>::Get,
  GetProtoObjectHandle,
  GetCCParticipant<mozilla::dom::Blob>::Get()
};
static_assert(1 == DOM_INSTANCE_RESERVED_SLOTS,
              "Must have the right minimal number of reserved slots.");
static_assert(1 >= 1,
              "Must have enough reserved slots.");

const JSClass*
GetJSClass()
{
  return sClass.ToJSClass();
}

bool
Wrap(JSContext* aCx, mozilla::dom::Blob* aObject, nsWrapperCache* aCache, JS::Handle<JSObject*> aGivenProto, JS::MutableHandle<JSObject*> aReflector)
{
  static_assert(!IsBaseOf<NonRefcountedDOMObject, mozilla::dom::Blob>::value,
                "Shouldn't have wrappercached things that are not refcounted.");
  MOZ_ASSERT(static_cast<mozilla::dom::Blob*>(aObject) ==
             reinterpret_cast<mozilla::dom::Blob*>(aObject),
             "Multiple inheritance for mozilla::dom::Blob is broken.");
  MOZ_ASSERT(ToSupportsIsCorrect(aObject));
  MOZ_ASSERT_IF(aGivenProto, js::IsObjectInContextCompartment(aGivenProto, aCx));
  MOZ_ASSERT(!aCache->GetWrapper(),
             "You should probably not be using Wrap() directly; use "
             "GetOrCreateDOMReflector instead");

  MOZ_ASSERT(ToSupportsIsOnPrimaryInheritanceChain(aObject, aCache),
             "nsISupports must be on our primary inheritance chain");

  JS::Rooted<JSObject*> global(aCx, FindAssociatedGlobal(aCx, aObject->GetParentObject()));
  if (!global) {
    return false;
  }
  MOZ_ASSERT(JS_IsGlobalObject(global));
  MOZ_ASSERT(JS::ObjectIsNotGray(global));

  // That might have ended up wrapping us already, due to the wonders
  // of XBL.  Check for that, and bail out as needed.
  aReflector.set(aCache->GetWrapper());
  if (aReflector) {
#ifdef DEBUG
    AssertReflectorHasGivenProto(aCx, aReflector, aGivenProto);
#endif // DEBUG
    return true;
  }

  JSAutoRealm ar(aCx, global);
  JS::Handle<JSObject*> canonicalProto = GetProtoObjectHandle(aCx);
  if (!canonicalProto) {
    return false;
  }
  JS::Rooted<JSObject*> proto(aCx);
  if (aGivenProto) {
    proto = aGivenProto;
    // Unfortunately, while aGivenProto was in the compartment of aCx
    // coming in, we changed compartments to that of "parent" so may need
    // to wrap the proto here.
    if (js::GetContextCompartment(aCx) != js::GetObjectCompartment(proto)) {
      if (!JS_WrapObject(aCx, &proto)) {
        return false;
      }
    }
  } else {
    proto = canonicalProto;
  }

  BindingJSObjectCreator<mozilla::dom::Blob> creator(aCx);
  creator.CreateObject(aCx, sClass.ToJSClass(), proto, aObject, aReflector);
  if (!aReflector) {
    return false;
  }

  aCache->SetWrapper(aReflector);
  creator.InitializationSucceeded();

  MOZ_ASSERT(aCache->GetWrapperPreserveColor() &&
             aCache->GetWrapperPreserveColor() == aReflector);
  // If proto != canonicalProto, we have to preserve our wrapper;
  // otherwise we won't be able to properly recreate it later, since
  // we won't know what proto to use.  Note that we don't check
  // aGivenProto here, since it's entirely possible (and even
  // somewhat common) to have a non-null aGivenProto which is the
  // same as canonicalProto.
  if (proto != canonicalProto) {
    PreserveWrapper(aObject);
  }

  return true;
}

const NativePropertyHooks sNativePropertyHooks[] = { {
  nullptr,
  nullptr,
  nullptr,
  { sNativeProperties.Upcast(), nullptr },
  prototypes::id::Blob,
  constructors::id::Blob,
  nullptr,
  &DefaultXrayExpandoObjectClass
} };

void
CreateInterfaceObjects(JSContext* aCx, JS::Handle<JSObject*> aGlobal, ProtoAndIfaceCache& aProtoAndIfaceCache, bool aDefineOnGlobal)
{
  JS::Rooted<JSObject*> parentProto(aCx, JS::GetRealmObjectPrototype(aCx));
  if (!parentProto) {
    return;
  }

  JS::Rooted<JSObject*> constructorProto(aCx, JS::GetRealmFunctionPrototype(aCx));
  if (!constructorProto) {
    return;
  }

  static bool sIdsInited = false;
  if (!sIdsInited && NS_IsMainThread()) {
    if (!InitIds(aCx, sNativeProperties.Upcast())) {
      return;
    }
    sIdsInited = true;
  }

  JS::Heap<JSObject*>* protoCache = &aProtoAndIfaceCache.EntrySlotOrCreate(prototypes::id::Blob);
  JS::Heap<JSObject*>* interfaceCache = &aProtoAndIfaceCache.EntrySlotOrCreate(constructors::id::Blob);
  dom::CreateInterfaceObjects(aCx, aGlobal, parentProto,
                              &sPrototypeClass.mBase, protoCache,
                              nullptr,
                              constructorProto, &sInterfaceObjectClass.mBase, 0, nullptr,
                              interfaceCache,
                              sNativeProperties.Upcast(),
                              nullptr,
                              "Blob", aDefineOnGlobal,
                              nullptr,
                              false);
}

JSObject*
GetProtoObject(JSContext* aCx)
{
  return GetProtoObjectHandle(aCx);
}

JSObject*
GetConstructorObject(JSContext* aCx)
{
  return GetConstructorObjectHandle(aCx);
}

} // namespace Blob_Binding



} // namespace dom
} // namespace mozilla

Coverage Report

Created: 2018-09-25 14:53