Google Git
Sign in
chromium / v8 / v8 / refs/heads/main / . / src / diagnostics / objects-debug.cc
blob: a9ae42de8a347d3788b5849c9748e05ff40f9246 [file] [log] [blame]
// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/base/logging.h"
#include "src/codegen/assembler-inl.h"
#include "src/common/globals.h"
#include "src/date/date.h"
#include "src/diagnostics/disasm.h"
#include "src/diagnostics/disassembler.h"
#include "src/heap/combined-heap.h"
#include "src/heap/heap-write-barrier-inl.h"
#include "src/heap/read-only-heap.h"
#include "src/ic/handler-configuration-inl.h"
#include "src/init/bootstrapper.h"
#include "src/logging/runtime-call-stats-scope.h"
#include "src/objects/allocation-site-inl.h"
#include "src/objects/arguments-inl.h"
#include "src/objects/bigint.h"
#include "src/objects/call-site-info-inl.h"
#include "src/objects/cell-inl.h"
#include "src/objects/code-inl.h"
#include "src/objects/data-handler-inl.h"
#include "src/objects/debug-objects-inl.h"
#include "src/objects/elements.h"
#include "src/objects/embedder-data-array-inl.h"
#include "src/objects/embedder-data-slot-inl.h"
#include "src/objects/feedback-cell-inl.h"
#include "src/objects/field-type.h"
#include "src/objects/foreign-inl.h"
#include "src/objects/free-space-inl.h"
#include "src/objects/function-kind.h"
#include "src/objects/hash-table-inl.h"
#include "src/objects/instance-type.h"
#include "src/objects/js-array-buffer-inl.h"
#include "src/objects/js-array-inl.h"
#include "src/objects/js-atomics-synchronization-inl.h"
#include "src/objects/objects-inl.h"
#include "src/objects/objects.h"
#include "src/objects/trusted-object.h"
#include "src/objects/turbofan-types-inl.h"
#include "src/objects/turboshaft-types-inl.h"
#include "src/roots/roots.h"
#ifdef V8_INTL_SUPPORT
#include "src/objects/js-break-iterator-inl.h"
#include "src/objects/js-collator-inl.h"
#endif // V8_INTL_SUPPORT
#include "src/objects/js-collection-inl.h"
#ifdef V8_INTL_SUPPORT
#include "src/objects/js-date-time-format-inl.h"
#include "src/objects/js-display-names-inl.h"
#include "src/objects/js-duration-format-inl.h"
#endif // V8_INTL_SUPPORT
#include "src/objects/js-disposable-stack-inl.h"
#include "src/objects/js-generator-inl.h"
#include "src/objects/js-iterator-helpers-inl.h"
#ifdef V8_INTL_SUPPORT
#include "src/objects/js-list-format-inl.h"
#include "src/objects/js-locale-inl.h"
#include "src/objects/js-number-format-inl.h"
#include "src/objects/js-plural-rules-inl.h"
#endif // V8_INTL_SUPPORT
#include "src/objects/js-regexp-inl.h"
#include "src/objects/js-regexp-string-iterator-inl.h"
#include "src/objects/js-shadow-realm-inl.h"
#ifdef V8_INTL_SUPPORT
#include "src/objects/js-relative-time-format-inl.h"
#include "src/objects/js-segment-iterator-inl.h"
#include "src/objects/js-segmenter-inl.h"
#include "src/objects/js-segments-inl.h"
#endif // V8_INTL_SUPPORT
#include "src/objects/hole-inl.h"
#include "src/objects/js-raw-json-inl.h"
#include "src/objects/js-shared-array-inl.h"
#include "src/objects/js-struct-inl.h"
#include "src/objects/js-temporal-objects-inl.h"
#include "src/objects/js-weak-refs-inl.h"
#include "src/objects/literal-objects-inl.h"
#include "src/objects/maybe-object.h"
#include "src/objects/megadom-handler-inl.h"
#include "src/objects/microtask-inl.h"
#include "src/objects/module-inl.h"
#include "src/objects/oddball-inl.h"
#include "src/objects/promise-inl.h"
#include "src/objects/property-descriptor-object-inl.h"
#include "src/objects/struct-inl.h"
#include "src/objects/swiss-name-dictionary-inl.h"
#include "src/objects/synthetic-module-inl.h"
#include "src/objects/template-objects-inl.h"
#include "src/objects/torque-defined-classes-inl.h"
#include "src/objects/transitions-inl.h"
#include "src/regexp/regexp.h"
#include "src/utils/ostreams.h"
#include "torque-generated/class-verifiers.h"
#if V8_ENABLE_WEBASSEMBLY
#include "src/base/strings.h"
#include "src/debug/debug-wasm-objects-inl.h"
#include "src/wasm/wasm-objects-inl.h"
#endif // V8_ENABLE_WEBASSEMBLY
namespace v8 {
namespace internal {
// Heap Verification Overview
// --------------------------
// - Each InstanceType has a separate XXXVerify method which checks an object's
// integrity in isolation.
// - --verify-heap will iterate over all gc spaces and call ObjectVerify() on
// every encountered tagged pointer.
// - Verification should be pushed down to the specific instance type if its
// integrity is independent of an outer object.
// - In cases where the InstanceType is too generic (e.g. FixedArray) the
// XXXVerify of the outer method has to do recursive verification.
// - If the corresponding objects have inheritence the parent's Verify method
// is called as well.
// - For any field containing pointes VerifyPointer(...) should be called.
//
// Caveats
// -------
// - Assume that any of the verify methods is incomplete!
// - Some integrity checks are only partially done due to objects being in
// partially initialized states when a gc happens, for instance when outer
// objects are allocted before inner ones.
//
#ifdef VERIFY_HEAP
#define USE_TORQUE_VERIFIER(Class) \
void Class::Class##Verify(Isolate* isolate) { \
TorqueGeneratedClassVerifiers::Class##Verify(*this, isolate); \
}
// static
void Object::ObjectVerify(Tagged<Object> obj, Isolate* isolate) {
RCS_SCOPE(isolate, RuntimeCallCounterId::kObjectVerify);
if (IsSmi(obj)) {
Smi::SmiVerify(Smi::cast(obj), isolate);
} else {
HeapObject::cast(obj)->HeapObjectVerify(isolate);
}
PtrComprCageBase cage_base(isolate);
CHECK(!IsConstructor(obj, cage_base) || IsCallable(obj, cage_base));
}
void Object::VerifyPointer(Isolate* isolate, Tagged<Object> p) {
if (IsHeapObject(p)) {
HeapObject::VerifyHeapPointer(isolate, p);
} else {
CHECK(IsSmi(p));
}
}
void Object::VerifyAnyTagged(Isolate* isolate, Tagged<Object> p) {
if (IsHeapObject(p)) {
if (V8_EXTERNAL_CODE_SPACE_BOOL) {
CHECK(IsValidHeapObject(isolate->heap(), HeapObject::cast(p)));
} else {
HeapObject::VerifyHeapPointer(isolate, p);
}
} else {
CHECK(IsSmi(p));
}
}
void Object::VerifyMaybeObjectPointer(Isolate* isolate, Tagged<MaybeObject> p) {
Tagged<HeapObject> heap_object;
if (p.GetHeapObject(&heap_object)) {
HeapObject::VerifyHeapPointer(isolate, heap_object);
} else {
CHECK(p.IsSmi() || p.IsCleared() || MapWord::IsPacked(p.ptr()));
}
}
// static
void Smi::SmiVerify(Tagged<Smi> obj, Isolate* isolate) {
CHECK(IsSmi(obj));
CHECK(!IsCallable(obj));
CHECK(!IsConstructor(obj));
}
// static
void TaggedIndex::TaggedIndexVerify(Tagged<TaggedIndex> obj, Isolate* isolate) {
CHECK(IsTaggedIndex(obj));
}
void HeapObject::HeapObjectVerify(Isolate* isolate) {
CHECK(IsHeapObject(*this));
PtrComprCageBase cage_base(isolate);
Object::VerifyPointer(isolate, map(cage_base));
CHECK(IsMap(map(cage_base), cage_base));
CHECK(CheckRequiredAlignment(isolate));
// Only TrustedObjects live in trusted space. See also TrustedObjectVerify.
CHECK_IMPLIES(!IsTrustedObject(*this) && !IsFreeSpaceOrFiller(*this),
!IsTrustedSpaceObject(*this));
switch (map(cage_base)->instance_type()) {
#define STRING_TYPE_CASE(TYPE, size, name, CamelName) case TYPE:
STRING_TYPE_LIST(STRING_TYPE_CASE)
#undef STRING_TYPE_CASE
if (IsConsString(*this, cage_base)) {
ConsString::cast(*this)->ConsStringVerify(isolate);
} else if (IsSlicedString(*this, cage_base)) {
SlicedString::cast(*this)->SlicedStringVerify(isolate);
} else if (IsThinString(*this, cage_base)) {
ThinString::cast(*this)->ThinStringVerify(isolate);
} else if (IsSeqString(*this, cage_base)) {
SeqString::cast(*this)->SeqStringVerify(isolate);
} else if (IsExternalString(*this, cage_base)) {
ExternalString::cast(*this)->ExternalStringVerify(isolate);
} else {
String::cast(*this)->StringVerify(isolate);
}
break;
// FixedArray types
case HASH_TABLE_TYPE:
case ORDERED_HASH_MAP_TYPE:
case ORDERED_HASH_SET_TYPE:
case ORDERED_NAME_DICTIONARY_TYPE:
case NAME_TO_INDEX_HASH_TABLE_TYPE:
case REGISTERED_SYMBOL_TABLE_TYPE:
case NAME_DICTIONARY_TYPE:
case GLOBAL_DICTIONARY_TYPE:
case NUMBER_DICTIONARY_TYPE:
case SIMPLE_NUMBER_DICTIONARY_TYPE:
case EPHEMERON_HASH_TABLE_TYPE:
FixedArray::cast(*this)->FixedArrayVerify(isolate);
break;
case AWAIT_CONTEXT_TYPE:
case BLOCK_CONTEXT_TYPE:
case CATCH_CONTEXT_TYPE:
case DEBUG_EVALUATE_CONTEXT_TYPE:
case EVAL_CONTEXT_TYPE:
case FUNCTION_CONTEXT_TYPE:
case MODULE_CONTEXT_TYPE:
case SCRIPT_CONTEXT_TYPE:
case WITH_CONTEXT_TYPE:
Context::cast(*this)->ContextVerify(isolate);
break;
case NATIVE_CONTEXT_TYPE:
NativeContext::cast(*this)->NativeContextVerify(isolate);
break;
case FEEDBACK_METADATA_TYPE:
FeedbackMetadata::cast(*this)->FeedbackMetadataVerify(isolate);
break;
case TRANSITION_ARRAY_TYPE:
TransitionArray::cast(*this)->TransitionArrayVerify(isolate);
break;
case INSTRUCTION_STREAM_TYPE:
InstructionStream::cast(*this)->InstructionStreamVerify(isolate);
break;
case JS_API_OBJECT_TYPE:
case JS_ARRAY_ITERATOR_PROTOTYPE_TYPE:
case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
case JS_ERROR_TYPE:
case JS_ITERATOR_PROTOTYPE_TYPE:
case JS_MAP_ITERATOR_PROTOTYPE_TYPE:
case JS_OBJECT_PROTOTYPE_TYPE:
case JS_PROMISE_PROTOTYPE_TYPE:
case JS_REG_EXP_PROTOTYPE_TYPE:
case JS_SET_ITERATOR_PROTOTYPE_TYPE:
case JS_SET_PROTOTYPE_TYPE:
case JS_SPECIAL_API_OBJECT_TYPE:
case JS_STRING_ITERATOR_PROTOTYPE_TYPE:
case JS_TYPED_ARRAY_PROTOTYPE_TYPE:
JSObject::cast(*this)->JSObjectVerify(isolate);
break;
#if V8_ENABLE_WEBASSEMBLY
case WASM_TRUSTED_INSTANCE_DATA_TYPE:
WasmTrustedInstanceData::cast(*this)->WasmTrustedInstanceDataVerify(
isolate);
break;
case WASM_DISPATCH_TABLE_TYPE:
WasmDispatchTable::cast(*this)->WasmDispatchTableVerify(isolate);
break;
case WASM_VALUE_OBJECT_TYPE:
WasmValueObject::cast(*this)->WasmValueObjectVerify(isolate);
break;
case WASM_EXCEPTION_PACKAGE_TYPE:
WasmExceptionPackage::cast(*this)->WasmExceptionPackageVerify(isolate);
break;
#endif // V8_ENABLE_WEBASSEMBLY
case JS_SET_KEY_VALUE_ITERATOR_TYPE:
case JS_SET_VALUE_ITERATOR_TYPE:
JSSetIterator::cast(*this)->JSSetIteratorVerify(isolate);
break;
case JS_MAP_KEY_ITERATOR_TYPE:
case JS_MAP_KEY_VALUE_ITERATOR_TYPE:
case JS_MAP_VALUE_ITERATOR_TYPE:
JSMapIterator::cast(*this)->JSMapIteratorVerify(isolate);
break;
case FILLER_TYPE:
break;
case CODE_TYPE:
Code::cast(*this)->CodeVerify(isolate);
break;
case CODE_WRAPPER_TYPE:
CodeWrapper::cast(*this)->CodeWrapperVerify(isolate);
break;
#define MAKE_TORQUE_CASE(Name, TYPE) \
case TYPE: \
Name::cast(*this)->Name##Verify(isolate); \
break;
// Every class that has its fields defined in a .tq file and corresponds
// to exactly one InstanceType value is included in the following list.
TORQUE_INSTANCE_CHECKERS_SINGLE_FULLY_DEFINED(MAKE_TORQUE_CASE)
TORQUE_INSTANCE_CHECKERS_MULTIPLE_FULLY_DEFINED(MAKE_TORQUE_CASE)
#undef MAKE_TORQUE_CASE
case ALLOCATION_SITE_TYPE:
AllocationSite::cast(*this)->AllocationSiteVerify(isolate);
break;
case LOAD_HANDLER_TYPE:
LoadHandler::cast(*this)->LoadHandlerVerify(isolate);
break;
case STORE_HANDLER_TYPE:
StoreHandler::cast(*this)->StoreHandlerVerify(isolate);
break;
case BIG_INT_BASE_TYPE:
BigIntBase::cast(*this)->BigIntBaseVerify(isolate);
break;
case JS_CLASS_CONSTRUCTOR_TYPE:
case JS_PROMISE_CONSTRUCTOR_TYPE:
case JS_REG_EXP_CONSTRUCTOR_TYPE:
case JS_ARRAY_CONSTRUCTOR_TYPE:
#define TYPED_ARRAY_CONSTRUCTORS_SWITCH(Type, type, TYPE, Ctype) \
case TYPE##_TYPED_ARRAY_CONSTRUCTOR_TYPE:
TYPED_ARRAYS(TYPED_ARRAY_CONSTRUCTORS_SWITCH)
#undef TYPED_ARRAY_CONSTRUCTORS_SWITCH
JSFunction::cast(*this)->JSFunctionVerify(isolate);
break;
case JS_LAST_DUMMY_API_OBJECT_TYPE:
UNREACHABLE();
}
}
// static
void HeapObject::VerifyHeapPointer(Isolate* isolate, Tagged<Object> p) {
CHECK(IsHeapObject(p));
// If you crashed here and {isolate->is_shared()}, there is a bug causing the
// host of {p} to point to a non-shared object.
CHECK(IsValidHeapObject(isolate->heap(), HeapObject::cast(p)));
CHECK_IMPLIES(V8_EXTERNAL_CODE_SPACE_BOOL, !IsInstructionStream(p));
}
// static
void HeapObject::VerifyCodePointer(Isolate* isolate, Tagged<Object> p) {
CHECK(IsHeapObject(p));
CHECK(IsValidCodeObject(isolate->heap(), HeapObject::cast(p)));
PtrComprCageBase cage_base(isolate);
CHECK(IsInstructionStream(HeapObject::cast(p), cage_base));
}
void Name::NameVerify(Isolate* isolate) {
PrimitiveHeapObjectVerify(isolate);
CHECK(IsName(this));
}
void Symbol::SymbolVerify(Isolate* isolate) {
NameVerify(isolate);
CHECK(IsSymbol(this));
uint32_t hash;
const bool has_hash = TryGetHash(&hash);
CHECK(has_hash);
CHECK_GT(hash, 0);
CHECK(IsUndefined(description(), isolate) || IsString(description()));
CHECK_IMPLIES(IsPrivateName(), IsPrivate());
CHECK_IMPLIES(IsPrivateBrand(), IsPrivateName());
}
void BytecodeArray::BytecodeArrayVerify(Isolate* isolate) {
ExposedTrustedObjectVerify(isolate);
{
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
CHECK_LE(0, length());
CHECK_LE(length(), kMaxLength);
}
{
auto o = constant_pool();
Object::VerifyPointer(isolate, o);
CHECK(IsTrustedFixedArray(o));
}
{
auto o = handler_table();
Object::VerifyPointer(isolate, o);
CHECK(IsTrustedByteArray(o));
}
{
auto o = wrapper();
Object::VerifyPointer(isolate, o);
CHECK(IsBytecodeWrapper(o));
// Our wrapper must point back to us.
CHECK_EQ(o->bytecode(isolate), *this);
}
{
// Use the raw accessor here as source positions may not be available.
auto o = raw_source_position_table(kAcquireLoad);
Object::VerifyPointer(isolate, o);
CHECK(o == Smi::zero() || IsTrustedByteArray(o));
}
for (int i = 0; i < constant_pool()->length(); ++i) {
// No ThinStrings in the constant pool.
CHECK(!IsThinString(constant_pool()->get(i), isolate));
}
// TODO(oth): Walk bytecodes and immediate values to validate sanity.
// - All bytecodes are known and well formed.
// - Jumps must go to new instructions starts.
// - No Illegal bytecodes.
// - No consecutive sequences of prefix Wide / ExtraWide.
}
void BytecodeWrapper::BytecodeWrapperVerify(Isolate* isolate) {
if (!this->has_bytecode()) return;
auto bytecode = this->bytecode(isolate);
Object::VerifyPointer(isolate, bytecode);
CHECK_EQ(bytecode->wrapper(), *this);
}
bool JSObject::ElementsAreSafeToExamine(PtrComprCageBase cage_base) const {
// If a GC was caused while constructing this object, the elements
// pointer may point to a one pointer filler map.
return elements(cage_base) !=
GetReadOnlyRoots(cage_base).one_pointer_filler_map();
}
namespace {
void VerifyJSObjectElements(Isolate* isolate, Tagged<JSObject> object) {
// Only TypedArrays can have these specialized elements.
if (IsJSTypedArray(object)) {
// TODO(bmeurer,v8:4153): Fix CreateTypedArray to either not instantiate
// the object or propertly initialize it on errors during construction.
/* CHECK(object->HasTypedArrayOrRabGsabTypedArrayElements()); */
return;
}
CHECK(!IsByteArray(object->elements()));
if (object->HasDoubleElements()) {
if (object->elements()->length() > 0) {
CHECK(IsFixedDoubleArray(object->elements()));
}
return;
}
if (object->HasSloppyArgumentsElements()) {
CHECK(IsSloppyArgumentsElements(object->elements()));
return;
}
Tagged<FixedArray> elements = FixedArray::cast(object->elements());
if (object->HasSmiElements()) {
// We might have a partially initialized backing store, in which case we
// allow the hole + smi values.
for (int i = 0; i < elements->length(); i++) {
Tagged<Object> value = elements->get(i);
CHECK(IsSmi(value) || IsTheHole(value, isolate));
}
} else if (object->HasObjectElements()) {
for (int i = 0; i < elements->length(); i++) {
Tagged<Object> element = elements->get(i);
CHECK(!HasWeakHeapObjectTag(element));
}
}
}
} // namespace
void JSObject::JSObjectVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSObjectVerify(*this, isolate);
VerifyHeapPointer(isolate, elements());
CHECK_IMPLIES(HasSloppyArgumentsElements(), IsJSArgumentsObject(*this));
if (HasFastProperties()) {
int actual_unused_property_fields = map()->GetInObjectProperties() +
property_array()->length() -
map()->NextFreePropertyIndex();
if (map()->UnusedPropertyFields() != actual_unused_property_fields) {
// There are two reasons why this can happen:
// - in the middle of StoreTransitionStub when the new extended backing
// store is already set into the object and the allocation of the
// HeapNumber triggers GC while the map isn't updated yet.
// - deletion of the last property can leave additional backing store
// capacity behind.
CHECK_GT(actual_unused_property_fields, map()->UnusedPropertyFields());
int delta = actual_unused_property_fields - map()->UnusedPropertyFields();
CHECK_EQ(0, delta % JSObject::kFieldsAdded);
}
Tagged<DescriptorArray> descriptors = map()->instance_descriptors(isolate);
bool is_transitionable_fast_elements_kind =
IsTransitionableFastElementsKind(map()->elements_kind());
for (InternalIndex i : map()->IterateOwnDescriptors()) {
PropertyDetails details = descriptors->GetDetails(i);
if (details.location() == PropertyLocation::kField) {
DCHECK_EQ(PropertyKind::kData, details.kind());
Representation r = details.representation();
FieldIndex index = FieldIndex::ForDetails(map(), details);
if (COMPRESS_POINTERS_BOOL && index.is_inobject()) {
VerifyObjectField(isolate, index.offset());
}
Tagged<Object> value = RawFastPropertyAt(index);
if (r.IsDouble()) DCHECK(IsHeapNumber(value));
if (IsUninitialized(value, isolate)) continue;
if (r.IsSmi()) DCHECK(IsSmi(value));
if (r.IsHeapObject()) DCHECK(IsHeapObject(value));
Tagged<FieldType> field_type = descriptors->GetFieldType(i);
bool type_is_none = IsNone(field_type);
bool type_is_any = IsAny(field_type);
if (r.IsNone()) {
CHECK(type_is_none);
} else if (!type_is_any && !(type_is_none && r.IsHeapObject())) {
CHECK(!FieldType::NowStable(field_type) ||
FieldType::NowContains(field_type, value));
}
CHECK_IMPLIES(is_transitionable_fast_elements_kind,
Map::IsMostGeneralFieldType(r, field_type));
}
}
if (map()->EnumLength() != kInvalidEnumCacheSentinel) {
Tagged<EnumCache> enum_cache = descriptors->enum_cache();
Tagged<FixedArray> keys = enum_cache->keys();
Tagged<FixedArray> indices = enum_cache->indices();
CHECK_LE(map()->EnumLength(), keys->length());
CHECK_IMPLIES(indices != ReadOnlyRoots(isolate).empty_fixed_array(),
keys->length() == indices->length());
}
}
// If a GC was caused while constructing this object, the elements
// pointer may point to a one pointer filler map.
if (ElementsAreSafeToExamine(isolate)) {
CHECK_EQ((map()->has_fast_smi_or_object_elements() ||
map()->has_any_nonextensible_elements() ||
(elements() == GetReadOnlyRoots().empty_fixed_array()) ||
HasFastStringWrapperElements()),
(elements()->map() == GetReadOnlyRoots().fixed_array_map() ||
elements()->map() == GetReadOnlyRoots().fixed_cow_array_map()));
CHECK_EQ(map()->has_fast_object_elements(), HasObjectElements());
VerifyJSObjectElements(isolate, *this);
}
}
void Map::MapVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::MapVerify(*this, isolate);
Heap* heap = isolate->heap();
CHECK(!ObjectInYoungGeneration(*this));
CHECK(FIRST_TYPE <= instance_type() && instance_type() <= LAST_TYPE);
CHECK(instance_size() == kVariableSizeSentinel ||
(kTaggedSize <= instance_size() &&
static_cast<size_t>(instance_size()) < heap->Capacity()));
if (IsContextMap(*this)) {
// The map for the NativeContext is allocated before the NativeContext
// itself, so it may happen that during a GC the native_context() is still
// null.
CHECK(IsNull(native_context_or_null()) ||
IsNativeContext(native_context_or_null()));
// The context's meta map is tied to the same native context.
CHECK_EQ(native_context_or_null(), map()->native_context_or_null());
} else {
if (IsUndefined(GetBackPointer(), isolate)) {
// Root maps must not have descriptors in the descriptor array that do not
// belong to the map.
CHECK_EQ(NumberOfOwnDescriptors(),
instance_descriptors(isolate)->number_of_descriptors());
} else {
// If there is a parent map it must be non-stable.
Tagged<Map> parent = Map::cast(GetBackPointer());
CHECK(!parent->is_stable());
Tagged<DescriptorArray> descriptors = instance_descriptors(isolate);
if (descriptors == parent->instance_descriptors(isolate)) {
if (NumberOfOwnDescriptors() == parent->NumberOfOwnDescriptors() + 1) {
// Descriptors sharing through property transitions takes over
// ownership from the parent map.
CHECK(!parent->owns_descriptors());
} else {
CHECK_EQ(NumberOfOwnDescriptors(), parent->NumberOfOwnDescriptors());
// Descriptors sharing through special transitions properly takes over
// ownership from the parent map unless it uses the canonical empty
// descriptor array.
if (descriptors != ReadOnlyRoots(isolate).empty_descriptor_array()) {
CHECK_IMPLIES(owns_descriptors(), !parent->owns_descriptors());
CHECK_IMPLIES(parent->owns_descriptors(), !owns_descriptors());
}
}
}
}
}
SLOW_DCHECK(instance_descriptors(isolate)->IsSortedNoDuplicates());
SLOW_DCHECK(TransitionsAccessor(isolate, *this).IsSortedNoDuplicates());
SLOW_DCHECK(
TransitionsAccessor(isolate, *this).IsConsistentWithBackPointers());
// Only JSFunction maps have has_prototype_slot() bit set and constructible
// JSFunction objects must have prototype slot.
CHECK_IMPLIES(has_prototype_slot(), IsJSFunctionMap(*this));
if (InstanceTypeChecker::IsNativeContextSpecific(instance_type())) {
// Native context-specific objects must have their own contextful meta map
// modulo the following exceptions.
if (instance_type() == NATIVE_CONTEXT_TYPE ||
instance_type() == JS_GLOBAL_PROXY_TYPE) {
// 1) Diring creation of the NativeContext the native context field might
// be not be initialized yet.
// 2) The same applies to the placeholder JSGlobalProxy object created by
// Factory::NewUninitializedJSGlobalProxy.
CHECK(IsNull(map()->native_context_or_null()) ||
IsNativeContext(map()->native_context_or_null()));
} else if (instance_type() == JS_SPECIAL_API_OBJECT_TYPE) {
// 3) Remote Api objects' maps have the RO meta map (and thus are not
// tied to any native context) while all the other Api objects are
// tied to a native context.
CHECK_IMPLIES(map() != GetReadOnlyRoots().meta_map(),
IsNativeContext(map()->native_context_or_null()));
} else {
// For all the other objects native context specific objects the
// native context field must already be initialized.
CHECK(IsNativeContext(map()->native_context_or_null()));
}
} else if (InstanceTypeChecker::IsAlwaysSharedSpaceJSObject(
instance_type())) {
// Shared objects' maps must use the RO meta map.
CHECK_EQ(map(), GetReadOnlyRoots().meta_map());
}
if (IsJSObjectMap(*this)) {
int header_end_offset = JSObject::GetHeaderSize(*this);
int inobject_fields_start_offset = GetInObjectPropertyOffset(0);
// Ensure that embedder fields are located exactly between header and
// inobject properties.
CHECK_EQ(header_end_offset, JSObject::GetEmbedderFieldsStartOffset(*this));
CHECK_EQ(header_end_offset +
JSObject::GetEmbedderFieldCount(*this) * kEmbedderDataSlotSize,
inobject_fields_start_offset);
if (IsJSSharedStructMap(*this) || IsJSSharedArrayMap(*this) ||
IsJSAtomicsMutex(*this) || IsJSAtomicsCondition(*this)) {
if (COMPRESS_POINTERS_IN_MULTIPLE_CAGES_BOOL) {
// TODO(v8:14089): Verify what should be checked in this configuration
// and again merge with the else-branch below.
// CHECK(InSharedHeap());
CHECK(IsUndefined(GetBackPointer(), isolate));
// Object maybe_cell = prototype_validity_cell(kRelaxedLoad);
// if (maybe_cell.IsCell()) CHECK(maybe_cell.InSharedHeap());
CHECK(!is_extensible());
CHECK(!is_prototype_map());
CHECK(OnlyHasSimpleProperties());
// CHECK(instance_descriptors(isolate).InSharedHeap());
if (IsJSSharedArrayMap(*this)) {
CHECK(has_shared_array_elements());
}
} else {
CHECK(InAnySharedSpace(*this));
CHECK(IsUndefined(GetBackPointer(), isolate));
Tagged<Object> maybe_cell = prototype_validity_cell(kRelaxedLoad);
if (IsCell(maybe_cell)) CHECK(InAnySharedSpace(Cell::cast(maybe_cell)));
CHECK(!is_extensible());
CHECK(!is_prototype_map());
CHECK(OnlyHasSimpleProperties());
CHECK(InAnySharedSpace(instance_descriptors(isolate)));
if (IsJSSharedArrayMap(*this)) {
CHECK(has_shared_array_elements());
}
}
}
// Check constuctor value in JSFunction's maps.
if (IsJSFunctionMap(*this) && !IsMap(constructor_or_back_pointer())) {
Tagged<Object> maybe_constructor = constructor_or_back_pointer();
// Constructor field might still contain a tuple if this map used to
// have non-instance prototype earlier.
CHECK_IMPLIES(has_non_instance_prototype(), IsTuple2(maybe_constructor));
if (IsTuple2(maybe_constructor)) {
Tagged<Tuple2> tuple = Tuple2::cast(maybe_constructor);
// Unwrap the {constructor, non-instance_prototype} pair.
maybe_constructor = tuple->value1();
CHECK(!IsJSReceiver(tuple->value2()));
}
CHECK(IsJSFunction(maybe_constructor) ||
IsFunctionTemplateInfo(maybe_constructor) ||
// The above check might fail until empty function setup is done.
IsUndefined(isolate->raw_native_context()->get(
Context::EMPTY_FUNCTION_INDEX)));
}
}
if (!may_have_interesting_properties()) {
CHECK(!has_named_interceptor());
CHECK(!is_dictionary_map());
CHECK(!is_access_check_needed());
Tagged<DescriptorArray> const descriptors = instance_descriptors(isolate);
for (InternalIndex i : IterateOwnDescriptors()) {
CHECK(!descriptors->GetKey(i)->IsInteresting(isolate));
}
}
CHECK_IMPLIES(has_named_interceptor(), may_have_interesting_properties());
CHECK_IMPLIES(is_dictionary_map(), may_have_interesting_properties());
CHECK_IMPLIES(is_access_check_needed(), may_have_interesting_properties());
CHECK_IMPLIES(
IsJSObjectMap(*this) && !CanHaveFastTransitionableElementsKind(),
IsDictionaryElementsKind(elements_kind()) ||
IsTerminalElementsKind(elements_kind()) ||
IsAnyHoleyNonextensibleElementsKind(elements_kind()) ||
IsSharedArrayElementsKind(elements_kind()));
CHECK_IMPLIES(is_deprecated(), !is_stable());
if (is_prototype_map()) {
CHECK(prototype_info() == Smi::zero() || IsPrototypeInfo(prototype_info()));
}
}
void Map::DictionaryMapVerify(Isolate* isolate) {
MapVerify(isolate);
CHECK(is_dictionary_map());
CHECK_EQ(kInvalidEnumCacheSentinel, EnumLength());
CHECK_EQ(ReadOnlyRoots(isolate).empty_descriptor_array(),
instance_descriptors(isolate));
CHECK_EQ(0, UnusedPropertyFields());
CHECK_EQ(Map::GetVisitorId(*this), visitor_id());
}
void EmbedderDataArray::EmbedderDataArrayVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::EmbedderDataArrayVerify(*this, isolate);
EmbedderDataSlot start(*this, 0);
EmbedderDataSlot end(*this, length());
for (EmbedderDataSlot slot = start; slot < end; ++slot) {
Tagged<Object> e = slot.load_tagged();
Object::VerifyPointer(isolate, e);
}
}
void FixedArrayBase::FixedArrayBaseVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
}
void FixedArray::FixedArrayVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
for (int i = 0; i < length(); ++i) {
Object::VerifyPointer(isolate, get(i));
}
if (*this == ReadOnlyRoots(isolate).empty_fixed_array()) {
CHECK_EQ(length(), 0);
CHECK_EQ(map(), ReadOnlyRoots(isolate).fixed_array_map());
}
}
void TrustedFixedArray::TrustedFixedArrayVerify(Isolate* isolate) {
TrustedObjectVerify(isolate);
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
for (int i = 0; i < length(); ++i) {
Object::VerifyPointer(isolate, get(i));
}
}
void ProtectedFixedArray::ProtectedFixedArrayVerify(Isolate* isolate) {
TrustedObjectVerify(isolate);
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
for (int i = 0; i < length(); ++i) {
Tagged<Object> element = get(i);
CHECK(IsSmi(element) || IsTrustedObject(element));
Object::VerifyPointer(isolate, element);
}
}
void RegExpMatchInfo::RegExpMatchInfoVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kCapacityOffset)));
CHECK_GE(capacity(), kMinCapacity);
CHECK_LE(capacity(), kMaxCapacity);
CHECK_GE(number_of_capture_registers(), kMinCapacity);
CHECK_LE(number_of_capture_registers(), capacity());
CHECK(IsString(last_subject()));
Object::VerifyPointer(isolate, last_input());
for (int i = 0; i < capacity(); ++i) {
CHECK(IsSmi(get(i)));
}
}
void ClosureFeedbackCellArray::ClosureFeedbackCellArrayVerify(
Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kCapacityOffset)));
for (int i = 0; i < length(); ++i) {
Object::VerifyPointer(isolate, get(i));
}
}
void WeakFixedArray::WeakFixedArrayVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
for (int i = 0; i < length(); i++) {
Object::VerifyMaybeObjectPointer(isolate, get(i));
}
}
void TrustedWeakFixedArray::TrustedWeakFixedArrayVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
for (int i = 0; i < length(); i++) {
Object::VerifyMaybeObjectPointer(isolate, get(i));
}
}
void ScriptContextTable::ScriptContextTableVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kCapacityOffset)));
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
int len = length(kAcquireLoad);
CHECK_LE(0, len);
CHECK_LE(len, capacity());
CHECK(IsNameToIndexHashTable(names_to_context_index()));
for (int i = 0; i < len; ++i) {
Tagged<Context> o = get(i);
Object::VerifyPointer(isolate, o);
CHECK(IsContext(o));
CHECK(o->IsScriptContext());
}
}
void ArrayList::ArrayListVerify(Isolate* isolate) {
CHECK_LE(0, length());
CHECK_LE(length(), capacity());
CHECK_IMPLIES(capacity() == 0,
*this == ReadOnlyRoots(isolate).empty_array_list());
for (int i = 0; i < capacity(); ++i) {
Object::VerifyPointer(isolate, get(i));
}
}
void PropertyArray::PropertyArrayVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::PropertyArrayVerify(*this, isolate);
if (length() == 0) {
CHECK_EQ(*this, ReadOnlyRoots(isolate).empty_property_array());
return;
}
// There are no empty PropertyArrays.
CHECK_LT(0, length());
for (int i = 0; i < length(); i++) {
Tagged<Object> e = get(i);
Object::VerifyPointer(isolate, e);
}
}
void ByteArray::ByteArrayVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
}
void TrustedByteArray::TrustedByteArrayVerify(Isolate* isolate) {
TrustedObjectVerify(isolate);
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
}
void ExternalPointerArray::ExternalPointerArrayVerify(Isolate* isolate) {
FixedArrayBase::FixedArrayBaseVerify(isolate);
}
void FixedDoubleArray::FixedDoubleArrayVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kLengthOffset)));
for (int i = 0; i < length(); i++) {
if (!is_the_hole(i)) {
uint64_t value = get_representation(i);
uint64_t unexpected =
base::bit_cast<uint64_t>(std::numeric_limits<double>::quiet_NaN()) &
uint64_t{0x7FF8000000000000};
// Create implementation specific sNaN by inverting relevant bit.
unexpected ^= uint64_t{0x0008000000000000};
CHECK((value & uint64_t{0x7FF8000000000000}) != unexpected ||
(value & uint64_t{0x0007FFFFFFFFFFFF}) == uint64_t{0});
}
}
}
void Context::ContextVerify(Isolate* isolate) {
if (has_extension()) VerifyExtensionSlot(extension());
TorqueGeneratedClassVerifiers::ContextVerify(*this, isolate);
for (int i = 0; i < length(); i++) {
VerifyObjectField(isolate, OffsetOfElementAt(i));
}
if (IsScriptContext()) {
Tagged<Object> side_data = get(CONST_TRACKING_LET_SIDE_DATA_INDEX);
CHECK(IsFixedArray(side_data));
Tagged<FixedArray> side_data_array = FixedArray::cast(side_data);
if (v8_flags.const_tracking_let) {
for (int i = 0; i < side_data_array->length(); i++) {
Tagged<Object> element = side_data_array->get(i);
if (IsSmi(element)) {
CHECK(element == ConstTrackingLetCell::kConstMarker ||
element == ConstTrackingLetCell::kNonConstMarker);
} else {
// The slot contains `undefined` before the variable is initialized.
CHECK(IsUndefined(element) || IsConstTrackingLetCell(element));
}
}
} else {
CHECK_EQ(0, side_data_array->length());
}
}
}
void NativeContext::NativeContextVerify(Isolate* isolate) {
ContextVerify(isolate);
CHECK(retained_maps() == Smi::zero() || IsWeakArrayList(retained_maps()));
CHECK_EQ(length(), NativeContext::NATIVE_CONTEXT_SLOTS);
CHECK_EQ(kVariableSizeSentinel, map()->instance_size());
}
void FeedbackMetadata::FeedbackMetadataVerify(Isolate* isolate) {
if (slot_count() == 0 && create_closure_slot_count() == 0) {
CHECK_EQ(ReadOnlyRoots(isolate).empty_feedback_metadata(), *this);
} else {
FeedbackMetadataIterator iter(*this);
while (iter.HasNext()) {
iter.Next();
FeedbackSlotKind kind = iter.kind();
CHECK_NE(FeedbackSlotKind::kInvalid, kind);
CHECK_GT(kFeedbackSlotKindCount, kind);
}
}
}
void DescriptorArray::DescriptorArrayVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::DescriptorArrayVerify(*this, isolate);
if (number_of_all_descriptors() == 0) {
CHECK_EQ(ReadOnlyRoots(isolate).empty_descriptor_array(), *this);
CHECK_EQ(0, number_of_all_descriptors());
CHECK_EQ(0, number_of_descriptors());
CHECK_EQ(ReadOnlyRoots(isolate).empty_enum_cache(), enum_cache());
} else {
CHECK_LT(0, number_of_all_descriptors());
CHECK_LE(number_of_descriptors(), number_of_all_descriptors());
// Check that properties with private symbols names are non-enumerable, and
// that fields are in order.
int expected_field_index = 0;
for (InternalIndex descriptor :
InternalIndex::Range(number_of_descriptors())) {
Tagged<Object> key =
*(GetDescriptorSlot(descriptor.as_int()) + kEntryKeyIndex);
// number_of_descriptors() may be out of sync with the actual descriptors
// written during descriptor array construction.
if (IsUndefined(key, isolate)) continue;
PropertyDetails details = GetDetails(descriptor);
if (Name::cast(key)->IsPrivate()) {
CHECK_NE(details.attributes() & DONT_ENUM, 0);
}
Tagged<MaybeObject> value = GetValue(descriptor);
Tagged<HeapObject> heap_object;
if (details.location() == PropertyLocation::kField) {
CHECK_EQ(details.field_index(), expected_field_index);
CHECK(value == FieldType::None() || value == FieldType::Any() ||
value.IsCleared() ||
(value.GetHeapObjectIfWeak(&heap_object) && IsMap(heap_object)));
expected_field_index += details.field_width_in_words();
} else {
CHECK(!value.IsWeakOrCleared());
CHECK(!IsMap(Tagged<Object>::cast(value)));
}
}
}
}
void TransitionArray::TransitionArrayVerify(Isolate* isolate) {
WeakFixedArrayVerify(isolate);
CHECK_LE(LengthFor(number_of_transitions()), length());
}
namespace {
void SloppyArgumentsElementsVerify(Isolate* isolate,
Tagged<SloppyArgumentsElements> elements,
Tagged<JSObject> holder) {
elements->SloppyArgumentsElementsVerify(isolate);
ElementsKind kind = holder->GetElementsKind();
bool is_fast = kind == FAST_SLOPPY_ARGUMENTS_ELEMENTS;
Tagged<Context> context_object = elements->context();
Tagged<FixedArray> arg_elements = elements->arguments();
if (arg_elements->length() == 0) {
CHECK(arg_elements == ReadOnlyRoots(isolate).empty_fixed_array());
return;
}
ElementsAccessor* accessor;
if (is_fast) {
accessor = ElementsAccessor::ForKind(HOLEY_ELEMENTS);
} else {
accessor = ElementsAccessor::ForKind(DICTIONARY_ELEMENTS);
}
int nofMappedParameters = 0;
int maxMappedIndex = 0;
for (int i = 0; i < nofMappedParameters; i++) {
// Verify that each context-mapped argument is either the hole or a valid
// Smi within context length range.
Tagged<Object> mapped = elements->mapped_entries(i, kRelaxedLoad);
if (IsTheHole(mapped, isolate)) {
// Slow sloppy arguments can be holey.
if (!is_fast) continue;
// Fast sloppy arguments elements are never holey. Either the element is
// context-mapped or present in the arguments elements.
CHECK(accessor->HasElement(holder, i, arg_elements));
continue;
}
int mappedIndex = Smi::ToInt(mapped);
nofMappedParameters++;
CHECK_LE(maxMappedIndex, mappedIndex);
maxMappedIndex = mappedIndex;
Tagged<Object> value = context_object->get(mappedIndex);
CHECK(IsObject(value));
// None of the context-mapped entries should exist in the arguments
// elements.
CHECK(!accessor->HasElement(holder, i, arg_elements));
}
CHECK_LE(nofMappedParameters, context_object->length());
CHECK_LE(nofMappedParameters, arg_elements->length());
CHECK_LE(maxMappedIndex, context_object->length());
CHECK_LE(maxMappedIndex, arg_elements->length());
}
} // namespace
void JSArgumentsObject::JSArgumentsObjectVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSArgumentsObjectVerify(*this, isolate);
if (IsSloppyArgumentsElementsKind(GetElementsKind())) {
SloppyArgumentsElementsVerify(
isolate, SloppyArgumentsElements::cast(elements()), *this);
}
if (isolate->IsInAnyContext(map(), Context::SLOPPY_ARGUMENTS_MAP_INDEX) ||
isolate->IsInAnyContext(map(),
Context::SLOW_ALIASED_ARGUMENTS_MAP_INDEX) ||
isolate->IsInAnyContext(map(),
Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX)) {
VerifyObjectField(isolate, JSSloppyArgumentsObject::kLengthOffset);
VerifyObjectField(isolate, JSSloppyArgumentsObject::kCalleeOffset);
} else if (isolate->IsInAnyContext(map(),
Context::STRICT_ARGUMENTS_MAP_INDEX)) {
VerifyObjectField(isolate, JSStrictArgumentsObject::kLengthOffset);
}
}
void JSAsyncFunctionObject::JSAsyncFunctionObjectVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSAsyncFunctionObjectVerify(*this, isolate);
}
void JSAsyncGeneratorObject::JSAsyncGeneratorObjectVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSAsyncGeneratorObjectVerify(*this, isolate);
}
void JSDate::JSDateVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSDateVerify(*this, isolate);
if (IsSmi(month())) {
int month = Smi::ToInt(this->month());
CHECK(0 <= month && month <= 11);
}
if (IsSmi(day())) {
int day = Smi::ToInt(this->day());
CHECK(1 <= day && day <= 31);
}
if (IsSmi(hour())) {
int hour = Smi::ToInt(this->hour());
CHECK(0 <= hour && hour <= 23);
}
if (IsSmi(min())) {
int min = Smi::ToInt(this->min());
CHECK(0 <= min && min <= 59);
}
if (IsSmi(sec())) {
int sec = Smi::ToInt(this->sec());
CHECK(0 <= sec && sec <= 59);
}
if (IsSmi(weekday())) {
int weekday = Smi::ToInt(this->weekday());
CHECK(0 <= weekday && weekday <= 6);
}
if (IsSmi(cache_stamp())) {
CHECK(Smi::ToInt(cache_stamp()) <=
Smi::ToInt(isolate->date_cache()->stamp()));
}
}
void String::StringVerify(Isolate* isolate) {
PrimitiveHeapObjectVerify(isolate);
CHECK(IsString(this, isolate));
CHECK(length() >= 0 && length() <= Smi::kMaxValue);
CHECK_IMPLIES(length() == 0, this == ReadOnlyRoots(isolate).empty_string());
if (IsInternalizedString(this)) {
CHECK(HasHashCode());
CHECK(!ObjectInYoungGeneration(this));
}
}
void ConsString::ConsStringVerify(Isolate* isolate) {
StringVerify(isolate);
CHECK(IsConsString(this, isolate));
CHECK_GE(length(), ConsString::kMinLength);
CHECK(length() == first()->length() + second()->length());
if (IsFlat()) {
// A flat cons can only be created by String::SlowFlatten.
// Afterwards, the first part may be externalized or internalized.
CHECK(IsSeqString(first()) || IsExternalString(first()) ||
IsThinString(first()));
}
}
void ThinString::ThinStringVerify(Isolate* isolate) {
StringVerify(isolate);
CHECK(IsThinString(this, isolate));
CHECK(!HasForwardingIndex(kAcquireLoad));
CHECK(IsInternalizedString(actual()));
CHECK(IsSeqString(actual()) || IsExternalString(actual()));
}
void SlicedString::SlicedStringVerify(Isolate* isolate) {
StringVerify(isolate);
CHECK(IsSlicedString(this, isolate));
CHECK(!IsConsString(parent()));
CHECK(!IsSlicedString(parent()));
#ifdef DEBUG
if (!isolate->has_turbofan_string_builders()) {
// Turbofan's string builder optimization can introduce SlicedString that
// are less than SlicedString::kMinLength characters. Their live range and
// scope are pretty limitted, but they can be visible to the GC, which
// shouldn't treat them as invalid.
CHECK_GE(length(), SlicedString::kMinLength);
}
#endif
}
void ExternalString::ExternalStringVerify(Isolate* isolate) {
StringVerify(isolate);
CHECK(IsExternalString(this, isolate));
}
void JSBoundFunction::JSBoundFunctionVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSBoundFunctionVerify(*this, isolate);
CHECK(IsCallable(*this));
CHECK_EQ(IsConstructor(*this), IsConstructor(bound_target_function()));
// Ensure that the function's meta map belongs to the same native context
// as the target function (i.e. meta maps are the same).
CHECK_EQ(map()->map(), bound_target_function()->map()->map());
}
void JSFunction::JSFunctionVerify(Isolate* isolate) {
// Don't call TorqueGeneratedClassVerifiers::JSFunctionVerify here because the
// Torque class definition contains the field `prototype_or_initial_map` which
// may not be allocated.
// This assertion exists to encourage updating this verification function if
// new fields are added in the Torque class layout definition.
static_assert(JSFunction::TorqueGeneratedClass::kHeaderSize ==
8 * kTaggedSize);
JSFunctionOrBoundFunctionOrWrappedFunctionVerify(isolate);
CHECK(IsJSFunction(*this));
Object::VerifyPointer(isolate, shared(isolate));
CHECK(IsSharedFunctionInfo(shared(isolate)));
Object::VerifyPointer(isolate, context(isolate, kRelaxedLoad));
CHECK(IsContext(context(isolate, kRelaxedLoad)));
Object::VerifyPointer(isolate, raw_feedback_cell(isolate));
CHECK(IsFeedbackCell(raw_feedback_cell(isolate)));
Object::VerifyPointer(isolate, code(isolate));
CHECK(IsCode(code(isolate)));
CHECK(map(isolate)->is_callable());
// Ensure that the function's meta map belongs to the same native context.
CHECK_EQ(map()->map()->native_context_or_null(), native_context());
Handle<JSFunction> function(*this, isolate);
LookupIterator it(isolate, function, isolate->factory()->prototype_string(),
LookupIterator::OWN_SKIP_INTERCEPTOR);
if (has_prototype_slot()) {
VerifyObjectField(isolate, kPrototypeOrInitialMapOffset);
}
if (has_prototype_property()) {
CHECK(it.IsFound());
CHECK_EQ(LookupIterator::ACCESSOR, it.state());
CHECK(IsAccessorInfo(*it.GetAccessors()));
} else {
CHECK(!it.IsFound() || it.state() != LookupIterator::ACCESSOR ||
!IsAccessorInfo(*it.GetAccessors()));
}
}
void JSWrappedFunction::JSWrappedFunctionVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSWrappedFunctionVerify(*this, isolate);
CHECK(IsCallable(*this));
// Ensure that the function's meta map belongs to the same native context.
CHECK_EQ(map()->map()->native_context_or_null(), context());
}
void SharedFunctionInfo::SharedFunctionInfoVerify(Isolate* isolate) {
// TODO(leszeks): Add a TorqueGeneratedClassVerifier for LocalIsolate.
SharedFunctionInfoVerify(ReadOnlyRoots(isolate));
}
void SharedFunctionInfo::SharedFunctionInfoVerify(LocalIsolate* isolate) {
SharedFunctionInfoVerify(ReadOnlyRoots(isolate));
}
namespace {
bool ShouldVerifySharedFunctionInfoFunctionIndex(
Tagged<SharedFunctionInfo> sfi) {
if (!sfi->HasBuiltinId()) return true;
switch (sfi->builtin_id()) {
case Builtin::kPromiseCapabilityDefaultReject:
case Builtin::kPromiseCapabilityDefaultResolve:
// For these we manually set custom function indices.
return false;
default:
return true;
}
UNREACHABLE();
}
} // namespace
void SharedFunctionInfo::SharedFunctionInfoVerify(ReadOnlyRoots roots) {
Tagged<Object> value = name_or_scope_info(kAcquireLoad);
if (IsScopeInfo(value)) {
CHECK(!ScopeInfo::cast(value)->IsEmpty());
CHECK_NE(value, roots.empty_scope_info());
}
#if V8_ENABLE_WEBASSEMBLY
bool is_wasm = HasWasmExportedFunctionData() || HasAsmWasmData() ||
HasWasmJSFunctionData() || HasWasmCapiFunctionData() ||
HasWasmResumeData();
#else
bool is_wasm = false;
#endif // V8_ENABLE_WEBASSEMBLY
CHECK(is_wasm || IsApiFunction() || HasBytecodeArray() || HasBuiltinId() ||
HasUncompiledDataWithPreparseData() ||
HasUncompiledDataWithoutPreparseData());
{
Tagged<HeapObject> script = this->script(kAcquireLoad);
CHECK(IsUndefined(script, roots) || IsScript(script));
}
if (!is_compiled()) {
CHECK(!HasFeedbackMetadata());
CHECK(IsScopeInfo(outer_scope_info()) ||
IsTheHole(outer_scope_info(), roots));
} else if (HasBytecodeArray() && HasFeedbackMetadata()) {
CHECK(IsFeedbackMetadata(feedback_metadata()));
}
if (ShouldVerifySharedFunctionInfoFunctionIndex(*this)) {
int expected_map_index =
Context::FunctionMapIndex(language_mode(), kind(), HasSharedName());
CHECK_EQ(expected_map_index, function_map_index());
}
Tagged<ScopeInfo> info = EarlyScopeInfo(kAcquireLoad);
if (!info->IsEmpty()) {
CHECK(kind() == info->function_kind());
CHECK_EQ(internal::IsModule(kind()), info->scope_type() == MODULE_SCOPE);
}
if (IsApiFunction()) {
CHECK(construct_as_builtin());
} else if (!HasBuiltinId()) {
CHECK(!construct_as_builtin());
} else {
if (builtin_id() != Builtin::kCompileLazy &&
builtin_id() != Builtin::kEmptyFunction) {
CHECK(construct_as_builtin());
} else {
CHECK(!construct_as_builtin());
}
}
}
void SharedFunctionInfoWrapper::SharedFunctionInfoWrapperVerify(
Isolate* isolate) {
Object::VerifyPointer(isolate, shared_info());
}
void JSGlobalProxy::JSGlobalProxyVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSGlobalProxyVerify(*this, isolate);
CHECK(map()->is_access_check_needed());
// Make sure that this object has no properties, elements.
CHECK_EQ(0, FixedArray::cast(elements())->length());
}
void JSGlobalObject::JSGlobalObjectVerify(Isolate* isolate) {
CHECK(IsJSGlobalObject(*this));
// Do not check the dummy global object for the builtins.
if (global_dictionary(kAcquireLoad)->NumberOfElements() == 0 &&
elements()->length() == 0) {
return;
}
JSObjectVerify(isolate);
}
void PrimitiveHeapObject::PrimitiveHeapObjectVerify(Isolate* isolate) {
CHECK(IsPrimitiveHeapObject(this, isolate));
}
void HeapNumber::HeapNumberVerify(Isolate* isolate) {
PrimitiveHeapObjectVerify(isolate);
CHECK(IsHeapNumber(this, isolate));
}
void Oddball::OddballVerify(Isolate* isolate) {
PrimitiveHeapObjectVerify(isolate);
CHECK(IsOddball(this, isolate));
Heap* heap = isolate->heap();
Tagged<Object> string = to_string();
Object::VerifyPointer(isolate, string);
CHECK(IsString(string));
Tagged<Object> type = type_of();
Object::VerifyPointer(isolate, type);
CHECK(IsString(type));
Tagged<Object> kind_value = kind_.load();
Object::VerifyPointer(isolate, kind_value);
CHECK(IsSmi(kind_value));
Tagged<Object> number = to_number();
Object::VerifyPointer(isolate, number);
CHECK(IsSmi(number) || IsHeapNumber(number));
if (IsHeapObject(number)) {
CHECK(number == ReadOnlyRoots(heap).nan_value() ||
number == ReadOnlyRoots(heap).hole_nan_value());
} else {
CHECK(IsSmi(number));
int value = Smi::ToInt(number);
// Hidden oddballs have negative smis.
const int kLeastHiddenOddballNumber = -7;
CHECK_LE(value, 1);
CHECK_GE(value, kLeastHiddenOddballNumber);
}
ReadOnlyRoots roots(heap);
if (map() == roots.undefined_map()) {
CHECK(this == roots.undefined_value());
} else if (map() == roots.null_map()) {
CHECK(this == roots.null_value());
} else if (map() == roots.boolean_map()) {
CHECK(this == roots.true_value() || this == roots.false_value());
} else {
UNREACHABLE();
}
}
void Hole::HoleVerify(Isolate* isolate) {
ReadOnlyRoots roots(isolate->heap());
CHECK_EQ(map(), roots.hole_map());
#define COMPARE_ROOTS_VALUE(_, Value, __) \
if (*this == roots.Value()) { \
return; \
}
HOLE_LIST(COMPARE_ROOTS_VALUE);
#undef COMPARE_ROOTS_VALUE
UNREACHABLE();
}
void PropertyCell::PropertyCellVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::PropertyCellVerify(*this, isolate);
CHECK(IsUniqueName(name()));
CheckDataIsCompatible(property_details(), value());
}
void ConstTrackingLetCell::ConstTrackingLetCellVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::ConstTrackingLetCellVerify(*this, isolate);
}
void TrustedObject::TrustedObjectVerify(Isolate* isolate) {
#if defined(V8_ENABLE_SANDBOX)
// All trusted objects must live in trusted space.
// TODO(saelo): Some objects are trusted but do not yet live in trusted space.
CHECK(IsTrustedSpaceObject(*this) || IsCode(*this));
#endif
}
void ExposedTrustedObject::ExposedTrustedObjectVerify(Isolate* isolate) {
TrustedObjectVerify(isolate);
#if defined(V8_ENABLE_SANDBOX)
// Check that the self indirect pointer is consistent, i.e. points back to
// this object.
InstanceType instance_type = map()->instance_type();
IndirectPointerTag tag = IndirectPointerTagFromInstanceType(instance_type);
// We can't use ReadIndirectPointerField here because the tag is not a
// compile-time constant.
IndirectPointerSlot slot =
RawIndirectPointerField(kSelfIndirectPointerOffset, tag);
Tagged<Object> self = slot.load(isolate);
CHECK_EQ(self, *this);
// If the object is in the read-only space, the self indirect pointer entry
// must be in the read-only segment, and vice versa.
if (tag == kCodeIndirectPointerTag) {
CodePointerTable::Space* space =
IsolateForSandbox(isolate).GetCodePointerTableSpaceFor(slot.address());
// During snapshot creation, the code pointer space of the read-only heap is
// not marked as an internal read-only space.
bool is_space_read_only =
space == isolate->read_only_heap()->code_pointer_space();
CHECK_EQ(is_space_read_only, InReadOnlySpace(*this));
} else {
CHECK(!InReadOnlySpace(*this));
}
#endif
}
void Code::CodeVerify(Isolate* isolate) {
ExposedTrustedObjectVerify(isolate);
CHECK(IsCode(*this));
if (has_instruction_stream()) {
Tagged<InstructionStream> istream = instruction_stream();
CHECK_EQ(istream->code(kAcquireLoad), *this);
CHECK_EQ(safepoint_table_offset(), 0);
CHECK_LE(safepoint_table_offset(), handler_table_offset());
CHECK_LE(handler_table_offset(), constant_pool_offset());
CHECK_LE(constant_pool_offset(), code_comments_offset());
CHECK_LE(code_comments_offset(), unwinding_info_offset());
CHECK_LE(unwinding_info_offset(), metadata_size());
// Ensure the cached code entry point corresponds to the InstructionStream
// object associated with this Code.
#if defined(V8_COMPRESS_POINTERS) && defined(V8_SHORT_BUILTIN_CALLS)
if (istream->instruction_start() == instruction_start()) {
// Most common case, all good.
} else {
// When shared pointer compression cage is enabled and it has the
// embedded code blob copy then the
// InstructionStream::instruction_start() might return the address of
// the remapped builtin regardless of whether the builtins copy existed
// when the instruction_start value was cached in the Code (see
// InstructionStream::OffHeapInstructionStart()). So, do a reverse
// Code object lookup via instruction_start value to ensure it
// corresponds to this current Code object.
Tagged<Code> lookup_result =
isolate->heap()->FindCodeForInnerPointer(instruction_start());
CHECK_EQ(lookup_result, *this);
}
#else
CHECK_EQ(istream->instruction_start(), instruction_start());
#endif // V8_COMPRESS_POINTERS && V8_SHORT_BUILTIN_CALLS
}
// Our wrapper must point back to us.
CHECK_EQ(wrapper()->code(isolate), *this);
}
void CodeWrapper::CodeWrapperVerify(Isolate* isolate) {
if (!this->has_code()) return;
auto code = this->code(isolate);
Object::VerifyPointer(isolate, code);
CHECK_EQ(code->wrapper(), *this);
}
void InstructionStream::InstructionStreamVerify(Isolate* isolate) {
TrustedObjectVerify(isolate);
Tagged<Code> code;
if (!TryGetCode(&code, kAcquireLoad)) return;
CHECK(
IsAligned(code->instruction_size(),
static_cast<unsigned>(InstructionStream::kMetadataAlignment)));
#if !defined(_MSC_VER) || defined(__clang__)
// See also: PlatformEmbeddedFileWriterWin::AlignToCodeAlignment.
CHECK_IMPLIES(!ReadOnlyHeap::Contains(*this),
IsAligned(instruction_start(), kCodeAlignment));
#endif // !defined(_MSC_VER) || defined(__clang__)
CHECK_IMPLIES(!ReadOnlyHeap::Contains(*this),
IsAligned(instruction_start(), kCodeAlignment));
CHECK_EQ(*this, code->instruction_stream());
CHECK(V8_ENABLE_THIRD_PARTY_HEAP_BOOL ||
Size() <= MemoryChunkLayout::MaxRegularCodeObjectSize() ||
isolate->heap()->InSpace(*this, CODE_LO_SPACE));
Address last_gc_pc = kNullAddress;
Object::ObjectVerify(relocation_info(), isolate);
for (RelocIterator it(code); !it.done(); it.next()) {
it.rinfo()->Verify(isolate);
// Ensure that GC will not iterate twice over the same pointer.
if (RelocInfo::IsGCRelocMode(it.rinfo()->rmode())) {
CHECK(it.rinfo()->pc() != last_gc_pc);
last_gc_pc = it.rinfo()->pc();
}
}
}
void JSArray::JSArrayVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSArrayVerify(*this, isolate);
// If a GC was caused while constructing this array, the elements
// pointer may point to a one pointer filler map.
if (!ElementsAreSafeToExamine(isolate)) return;
if (IsUndefined(elements(), isolate)) return;
CHECK(IsFixedArray(elements()) || IsFixedDoubleArray(elements()));
if (elements()->length() == 0) {
CHECK_EQ(elements(), ReadOnlyRoots(isolate).empty_fixed_array());
}
// Verify that the length and the elements backing store are in sync.
if (IsSmi(length()) && (HasFastElements() || HasAnyNonextensibleElements())) {
if (elements()->length() > 0) {
CHECK_IMPLIES(HasDoubleElements(), IsFixedDoubleArray(elements()));
CHECK_IMPLIES(HasSmiOrObjectElements() || HasAnyNonextensibleElements(),
IsFixedArray(elements()));
}
int size = Smi::ToInt(length());
// Holey / Packed backing stores might have slack or might have not been
// properly initialized yet.
CHECK(size <= elements()->length() ||
elements() == ReadOnlyRoots(isolate).empty_fixed_array());
} else {
CHECK(HasDictionaryElements());
uint32_t array_length;
CHECK(Object::ToArrayLength(length(), &array_length));
if (array_length == 0xFFFFFFFF) {
CHECK(Object::ToArrayLength(length(), &array_length));
}
if (array_length != 0) {
Tagged<NumberDictionary> dict = NumberDictionary::cast(elements());
// The dictionary can never have more elements than the array length + 1.
// If the backing store grows the verification might be triggered with
// the old length in place.
uint32_t nof_elements = static_cast<uint32_t>(dict->NumberOfElements());
if (nof_elements != 0) nof_elements--;
CHECK_LE(nof_elements, array_length);
}
}
}
void JSSet::JSSetVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSSetVerify(*this, isolate);
CHECK(IsOrderedHashSet(table()) || IsUndefined(table(), isolate));
// TODO(arv): Verify OrderedHashTable too.
}
void JSMap::JSMapVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSMapVerify(*this, isolate);
CHECK(IsOrderedHashMap(table()) || IsUndefined(table(), isolate));
// TODO(arv): Verify OrderedHashTable too.
}
void JSSetIterator::JSSetIteratorVerify(Isolate* isolate) {
CHECK(IsJSSetIterator(*this));
JSCollectionIteratorVerify(isolate);
CHECK(IsOrderedHashSet(table()));
CHECK(IsSmi(index()));
}
void JSMapIterator::JSMapIteratorVerify(Isolate* isolate) {
CHECK(IsJSMapIterator(*this));
JSCollectionIteratorVerify(isolate);
CHECK(IsOrderedHashMap(table()));
CHECK(IsSmi(index()));
}
USE_TORQUE_VERIFIER(JSShadowRealm)
namespace {
void VerifyElementIsShared(Tagged<Object> element) {
// Exception for ThinStrings:
// When storing a ThinString in a shared object, we want to store the actual
// string, which is shared when sharing the string table.
// It is possible that a stored shared string migrates to a ThinString later
// on, which is fine as the ThinString resides in shared space if the original
// string was in shared space.
if (IsThinString(element)) {
CHECK(v8_flags.shared_string_table);
CHECK(InWritableSharedSpace(ThinString::cast(element)));
} else {
CHECK(IsShared(element));
}
}
} // namespace
void JSSharedStruct::JSSharedStructVerify(Isolate* isolate) {
CHECK(IsJSSharedStruct(*this));
CHECK(InWritableSharedSpace(*this));
JSObjectVerify(isolate);
CHECK(HasFastProperties());
// Shared structs can only point to primitives or other shared HeapObjects,
// even internally.
Tagged<Map> struct_map = map();
CHECK(InAnySharedSpace(property_array()));
Tagged<DescriptorArray> descriptors =
struct_map->instance_descriptors(isolate);
for (InternalIndex i : struct_map->IterateOwnDescriptors()) {
PropertyDetails details = descriptors->GetDetails(i);
CHECK_EQ(PropertyKind::kData, details.kind());
if (JSSharedStruct::IsRegistryKeyDescriptor(isolate, struct_map, i)) {
CHECK_EQ(PropertyLocation::kDescriptor, details.location());
CHECK(IsInternalizedString(descriptors->GetStrongValue(i)));
} else if (JSSharedStruct::IsElementsTemplateDescriptor(isolate, struct_map,
i)) {
CHECK_EQ(PropertyLocation::kDescriptor, details.location());
CHECK(IsNumberDictionary(descriptors->GetStrongValue(i)));
} else {
CHECK_EQ(PropertyLocation::kField, details.location());
CHECK(details.representation().IsTagged());
CHECK(!IsNumberDictionary(descriptors->GetStrongValue(i)));
CHECK(!IsInternalizedString(descriptors->GetStrongValue(i)));
FieldIndex field_index = FieldIndex::ForDetails(struct_map, details);
VerifyElementIsShared(RawFastPropertyAt(field_index));
}
}
}
void JSAtomicsMutex::JSAtomicsMutexVerify(Isolate* isolate) {
CHECK(IsJSAtomicsMutex(*this));
CHECK(InWritableSharedSpace(*this));
JSObjectVerify(isolate);
}
void JSAtomicsCondition::JSAtomicsConditionVerify(Isolate* isolate) {
CHECK(IsJSAtomicsCondition(*this));
CHECK(InAnySharedSpace(*this));
JSObjectVerify(isolate);
}
void JSDisposableStack::JSDisposableStackVerify(Isolate* isolate) {
CHECK(IsJSDisposableStack(*this));
JSObjectVerify(isolate);
CHECK_EQ(length() % 2, 0);
CHECK_GE(stack()->capacity(), length());
}
void JSSharedArray::JSSharedArrayVerify(Isolate* isolate) {
CHECK(IsJSSharedArray(*this));
JSObjectVerify(isolate);
CHECK(HasFastProperties());
// Shared arrays can only point to primitives or other shared HeapObjects,
// even internally.
Tagged<FixedArray> storage = FixedArray::cast(elements());
uint32_t length = storage->length();
for (uint32_t j = 0; j < length; j++) {
Tagged<Object> element_value = storage->get(j);
VerifyElementIsShared(element_value);
}
}
void JSIteratorMapHelper::JSIteratorMapHelperVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSIteratorMapHelperVerify(*this, isolate);
CHECK(IsCallable(mapper()));
CHECK_GE(Object::Number(counter()), 0);
}
void JSIteratorFilterHelper::JSIteratorFilterHelperVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSIteratorFilterHelperVerify(*this, isolate);
CHECK(IsCallable(predicate()));
CHECK_GE(Object::Number(counter()), 0);
}
void JSIteratorTakeHelper::JSIteratorTakeHelperVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSIteratorTakeHelperVerify(*this, isolate);
CHECK_GE(Object::Number(remaining()), 0);
}
void JSIteratorDropHelper::JSIteratorDropHelperVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSIteratorDropHelperVerify(*this, isolate);
CHECK_GE(Object::Number(remaining()), 0);
}
void JSIteratorFlatMapHelper::JSIteratorFlatMapHelperVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSIteratorFlatMapHelperVerify(*this, isolate);
CHECK(IsCallable(mapper()));
CHECK_GE(Object::Number(counter()), 0);
}
void WeakCell::WeakCellVerify(Isolate* isolate) {
CHECK(IsWeakCell(*this));
CHECK(IsUndefined(target(), isolate) || Object::CanBeHeldWeakly(target()));
CHECK(IsWeakCell(prev()) || IsUndefined(prev(), isolate));
if (IsWeakCell(prev())) {
CHECK_EQ(WeakCell::cast(prev())->next(), *this);
}
CHECK(IsWeakCell(next()) || IsUndefined(next(), isolate));
if (IsWeakCell(next())) {
CHECK_EQ(WeakCell::cast(next())->prev(), *this);
}
CHECK_IMPLIES(IsUndefined(unregister_token(), isolate),
IsUndefined(key_list_prev(), isolate));
CHECK_IMPLIES(IsUndefined(unregister_token(), isolate),
IsUndefined(key_list_next(), isolate));
CHECK(IsWeakCell(key_list_prev()) || IsUndefined(key_list_prev(), isolate));
CHECK(IsWeakCell(key_list_next()) || IsUndefined(key_list_next(), isolate));
CHECK(IsUndefined(finalization_registry(), isolate) ||
IsJSFinalizationRegistry(finalization_registry()));
}
void JSWeakRef::JSWeakRefVerify(Isolate* isolate) {
CHECK(IsJSWeakRef(*this));
JSObjectVerify(isolate);
CHECK(IsUndefined(target(), isolate) || Object::CanBeHeldWeakly(target()));
}
void JSFinalizationRegistry::JSFinalizationRegistryVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSFinalizationRegistryVerify(*this, isolate);
if (IsWeakCell(active_cells())) {
CHECK(IsUndefined(WeakCell::cast(active_cells())->prev(), isolate));
}
if (IsWeakCell(cleared_cells())) {
CHECK(IsUndefined(WeakCell::cast(cleared_cells())->prev(), isolate));
}
}
void JSWeakMap::JSWeakMapVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSWeakMapVerify(*this, isolate);
CHECK(IsEphemeronHashTable(table()) || IsUndefined(table(), isolate));
}
void JSArrayIterator::JSArrayIteratorVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSArrayIteratorVerify(*this, isolate);
CHECK_GE(Object::Number(next_index()), 0);
CHECK_LE(Object::Number(next_index()), kMaxSafeInteger);
if (IsJSTypedArray(iterated_object())) {
// JSTypedArray::length is limited to Smi range.
CHECK(IsSmi(next_index()));
CHECK_LE(Object::Number(next_index()), Smi::kMaxValue);
} else if (IsJSArray(iterated_object())) {
// JSArray::length is limited to Uint32 range.
CHECK_LE(Object::Number(next_index()), kMaxUInt32);
}
}
void JSStringIterator::JSStringIteratorVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSStringIteratorVerify(*this, isolate);
CHECK_GE(index(), 0);
CHECK_LE(index(), String::kMaxLength);
}
void JSWeakSet::JSWeakSetVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSWeakSetVerify(*this, isolate);
CHECK(IsEphemeronHashTable(table()) || IsUndefined(table(), isolate));
}
void CallableTask::CallableTaskVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::CallableTaskVerify(*this, isolate);
CHECK(IsCallable(callable()));
}
void JSPromise::JSPromiseVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSPromiseVerify(*this, isolate);
if (status() == Promise::kPending) {
CHECK(IsSmi(reactions()) || IsPromiseReaction(reactions()));
}
}
template <typename Derived>
void SmallOrderedHashTable<Derived>::SmallOrderedHashTableVerify(
Isolate* isolate) {
CHECK(IsSmallOrderedHashTable(*this));
int capacity = Capacity();
CHECK_GE(capacity, kMinCapacity);
CHECK_LE(capacity, kMaxCapacity);
for (int entry = 0; entry < NumberOfBuckets(); entry++) {
int bucket = GetFirstEntry(entry);
if (bucket == kNotFound) continue;
CHECK_GE(bucket, 0);
CHECK_LE(bucket, capacity);
}
for (int entry = 0; entry < NumberOfElements(); entry++) {
int chain = GetNextEntry(entry);
if (chain == kNotFound) continue;
CHECK_GE(chain, 0);
CHECK_LE(chain, capacity);
}
for (int entry = 0; entry < NumberOfElements(); entry++) {
for (int offset = 0; offset < Derived::kEntrySize; offset++) {
Tagged<Object> val = GetDataEntry(entry, offset);
Object::VerifyPointer(isolate, val);
}
}
for (int entry = NumberOfElements() + NumberOfDeletedElements();
entry < Capacity(); entry++) {
for (int offset = 0; offset < Derived::kEntrySize; offset++) {
Tagged<Object> val = GetDataEntry(entry, offset);
CHECK(IsTheHole(val, isolate));
}
}
}
void SmallOrderedHashMap::SmallOrderedHashMapVerify(Isolate* isolate) {
CHECK(IsSmallOrderedHashMap(*this));
SmallOrderedHashTable<SmallOrderedHashMap>::SmallOrderedHashTableVerify(
isolate);
for (int entry = NumberOfElements(); entry < NumberOfDeletedElements();
entry++) {
for (int offset = 0; offset < kEntrySize; offset++) {
Tagged<Object> val = GetDataEntry(entry, offset);
CHECK(IsTheHole(val, isolate));
}
}
}
void SmallOrderedHashSet::SmallOrderedHashSetVerify(Isolate* isolate) {
CHECK(IsSmallOrderedHashSet(*this));
SmallOrderedHashTable<SmallOrderedHashSet>::SmallOrderedHashTableVerify(
isolate);
for (int entry = NumberOfElements(); entry < NumberOfDeletedElements();
entry++) {
for (int offset = 0; offset < kEntrySize; offset++) {
Tagged<Object> val = GetDataEntry(entry, offset);
CHECK(IsTheHole(val, isolate));
}
}
}
void SmallOrderedNameDictionary::SmallOrderedNameDictionaryVerify(
Isolate* isolate) {
CHECK(IsSmallOrderedNameDictionary(*this));
SmallOrderedHashTable<
SmallOrderedNameDictionary>::SmallOrderedHashTableVerify(isolate);
for (int entry = NumberOfElements(); entry < NumberOfDeletedElements();
entry++) {
for (int offset = 0; offset < kEntrySize; offset++) {
Tagged<Object> val = GetDataEntry(entry, offset);
CHECK(IsTheHole(val, isolate) ||
(PropertyDetails::Empty().AsSmi() == Smi::cast(val)));
}
}
}
void SwissNameDictionary::SwissNameDictionaryVerify(Isolate* isolate) {
this->SwissNameDictionaryVerify(isolate, false);
}
void SwissNameDictionary::SwissNameDictionaryVerify(Isolate* isolate,
bool slow_checks) {
DisallowHeapAllocation no_gc;
CHECK(IsValidCapacity(Capacity()));
meta_table()->ByteArrayVerify(isolate);
int seen_deleted = 0;
int seen_present = 0;
for (int i = 0; i < Capacity(); i++) {
ctrl_t ctrl = GetCtrl(i);
if (IsFull(ctrl) || slow_checks) {
Tagged<Object> key = KeyAt(i);
Tagged<Object> value = ValueAtRaw(i);
if (IsFull(ctrl)) {
++seen_present;
Tagged<Name> name = Name::cast(key);
if (slow_checks) {
CHECK_EQ(swiss_table::H2(name->hash()), ctrl);
}
CHECK(!IsTheHole(key));
CHECK(!IsTheHole(value));
name->NameVerify(isolate);
Object::ObjectVerify(value, isolate);
} else if (IsDeleted(ctrl)) {
++seen_deleted;
CHECK(IsTheHole(key));
CHECK(IsTheHole(value));
} else if (IsEmpty(ctrl)) {
CHECK(IsTheHole(key));
CHECK(IsTheHole(value));
} else {
// Something unexpected. Note that we don't use kSentinel at the moment.
UNREACHABLE();
}
}
}
CHECK_EQ(seen_present, NumberOfElements());
if (slow_checks) {
CHECK_EQ(seen_deleted, NumberOfDeletedElements());
// Verify copy of first group at end (= after Capacity() slots) of control
// table.
for (int i = 0; i < std::min(static_cast<int>(Group::kWidth), Capacity());
++i) {
CHECK_EQ(CtrlTable()[i], CtrlTable()[Capacity() + i]);
}
// If 2 * capacity is smaller than the capacity plus group width, the slots
// after that must be empty.
for (int i = 2 * Capacity(); i < Capacity() + kGroupWidth; ++i) {
CHECK_EQ(Ctrl::kEmpty, CtrlTable()[i]);
}
for (int enum_index = 0; enum_index < UsedCapacity(); ++enum_index) {
int entry = EntryForEnumerationIndex(enum_index);
CHECK_LT(entry, Capacity());
ctrl_t ctrl = GetCtrl(entry);
// Enum table must not point to empty slots.
CHECK(IsFull(ctrl) || IsDeleted(ctrl));
}
}
}
void JSRegExp::JSRegExpVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSRegExpVerify(*this, isolate);
switch (type_tag()) {
case JSRegExp::ATOM: {
Tagged<FixedArray> arr = FixedArray::cast(data());
CHECK(IsString(arr->get(JSRegExp::kAtomPatternIndex)));
break;
}
case JSRegExp::EXPERIMENTAL: {
Tagged<FixedArray> arr = FixedArray::cast(data());
Tagged<Smi> uninitialized = Smi::FromInt(JSRegExp::kUninitializedValue);
Tagged<Object> latin1_code = arr->get(JSRegExp::kIrregexpLatin1CodeIndex);
Tagged<Object> uc16_code = arr->get(JSRegExp::kIrregexpUC16CodeIndex);
Tagged<Object> latin1_bytecode =
arr->get(JSRegExp::kIrregexpLatin1BytecodeIndex);
Tagged<Object> uc16_bytecode =
arr->get(JSRegExp::kIrregexpUC16BytecodeIndex);
bool is_compiled = IsCodeWrapper(latin1_code);
if (is_compiled) {
CHECK_EQ(CodeWrapper::cast(latin1_code)->code(isolate)->builtin_id(),
Builtin::kRegExpExperimentalTrampoline);
CHECK_EQ(uc16_code, latin1_code);
CHECK(IsByteArray(latin1_bytecode));
CHECK_EQ(uc16_bytecode, latin1_bytecode);
} else {
CHECK_EQ(latin1_code, uninitialized);
CHECK_EQ(uc16_code, uninitialized);
CHECK_EQ(latin1_bytecode, uninitialized);
CHECK_EQ(uc16_bytecode, uninitialized);
}
CHECK_EQ(arr->get(JSRegExp::kIrregexpMaxRegisterCountIndex),
uninitialized);
CHECK(IsSmi(arr->get(JSRegExp::kIrregexpCaptureCountIndex)));
CHECK_GE(Smi::ToInt(arr->get(JSRegExp::kIrregexpCaptureCountIndex)), 0);
CHECK_EQ(arr->get(JSRegExp::kIrregexpTicksUntilTierUpIndex),
uninitialized);
CHECK_EQ(arr->get(JSRegExp::kIrregexpBacktrackLimit), uninitialized);
break;
}
case JSRegExp::IRREGEXP: {
bool can_be_interpreted = RegExp::CanGenerateBytecode();
Tagged<FixedArray> arr = FixedArray::cast(data());
Tagged<Object> one_byte_data =
arr->get(JSRegExp::kIrregexpLatin1CodeIndex);
// Smi : Not compiled yet (-1).
// InstructionStream: Compiled irregexp code or trampoline to the
// interpreter.
CHECK((IsSmi(one_byte_data) &&
Smi::ToInt(one_byte_data) == JSRegExp::kUninitializedValue) ||
IsCodeWrapper(one_byte_data));
Tagged<Object> uc16_data = arr->get(JSRegExp::kIrregexpUC16CodeIndex);
CHECK((IsSmi(uc16_data) &&
Smi::ToInt(uc16_data) == JSRegExp::kUninitializedValue) ||
IsCodeWrapper(uc16_data));
Tagged<Object> one_byte_bytecode =
arr->get(JSRegExp::kIrregexpLatin1BytecodeIndex);
// Smi : Not compiled yet (-1).
// ByteArray: Bytecode to interpret regexp.
CHECK((IsSmi(one_byte_bytecode) &&
Smi::ToInt(one_byte_bytecode) == JSRegExp::kUninitializedValue) ||
(can_be_interpreted && IsByteArray(one_byte_bytecode)));
Tagged<Object> uc16_bytecode =
arr->get(JSRegExp::kIrregexpUC16BytecodeIndex);
CHECK((IsSmi(uc16_bytecode) &&
Smi::ToInt(uc16_bytecode) == JSRegExp::kUninitializedValue) ||
(can_be_interpreted && IsByteArray(uc16_bytecode)));
CHECK_IMPLIES(IsSmi(one_byte_data), IsSmi(one_byte_bytecode));
CHECK_IMPLIES(IsSmi(uc16_data), IsSmi(uc16_bytecode));
CHECK(IsSmi(arr->get(JSRegExp::kIrregexpCaptureCountIndex)));
CHECK_GE(Smi::ToInt(arr->get(JSRegExp::kIrregexpCaptureCountIndex)), 0);
CHECK(IsSmi(arr->get(JSRegExp::kIrregexpMaxRegisterCountIndex)));
CHECK(IsSmi(arr->get(JSRegExp::kIrregexpTicksUntilTierUpIndex)));
CHECK(IsSmi(arr->get(JSRegExp::kIrregexpBacktrackLimit)));
break;
}
default:
CHECK_EQ(JSRegExp::NOT_COMPILED, type_tag());
CHECK(IsUndefined(data(), isolate));
break;
}
}
void JSProxy::JSProxyVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSProxyVerify(*this, isolate);
CHECK(IsJSFunction(map()->GetConstructor()));
if (!IsRevoked()) {
CHECK_EQ(IsCallable(target()), map()->is_callable());
CHECK_EQ(IsConstructor(target()), map()->is_constructor());
}
CHECK(IsNull(map()->prototype(), isolate));
// There should be no properties on a Proxy.
CHECK_EQ(0, map()->NumberOfOwnDescriptors());
}
void JSArrayBuffer::JSArrayBufferVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSArrayBufferVerify(*this, isolate);
if (FIELD_SIZE(kOptionalPaddingOffset) != 0) {
CHECK_EQ(4, FIELD_SIZE(kOptionalPaddingOffset));
CHECK_EQ(0,
*reinterpret_cast<uint32_t*>(address() + kOptionalPaddingOffset));
}
}
void JSArrayBufferView::JSArrayBufferViewVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSArrayBufferViewVerify(*this, isolate);
CHECK_LE(byte_length(), JSArrayBuffer::kMaxByteLength);
CHECK_LE(byte_offset(), JSArrayBuffer::kMaxByteLength);
}
void JSTypedArray::JSTypedArrayVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSTypedArrayVerify(*this, isolate);
CHECK_LE(GetLength(), JSTypedArray::kMaxByteLength / element_size());
}
void JSDataView::JSDataViewVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSDataViewVerify(*this, isolate);
CHECK(!IsVariableLength());
if (!WasDetached()) {
CHECK_EQ(reinterpret_cast<uint8_t*>(
JSArrayBuffer::cast(buffer())->backing_store()) +
byte_offset(),
data_pointer());
}
}
void JSRabGsabDataView::JSRabGsabDataViewVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::JSRabGsabDataViewVerify(*this, isolate);
CHECK(IsVariableLength());
if (!WasDetached()) {
CHECK_EQ(reinterpret_cast<uint8_t*>(
JSArrayBuffer::cast(buffer())->backing_store()) +
byte_offset(),
data_pointer());
}
}
void AsyncGeneratorRequest::AsyncGeneratorRequestVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::AsyncGeneratorRequestVerify(*this, isolate);
CHECK_GE(resume_mode(), JSGeneratorObject::kNext);
CHECK_LE(resume_mode(), JSGeneratorObject::kThrow);
}
void BigIntBase::BigIntBaseVerify(Isolate* isolate) {
CHECK_GE(length(), 0);
CHECK_IMPLIES(is_zero(), !sign()); // There is no -0n.
}
void SourceTextModuleInfoEntry::SourceTextModuleInfoEntryVerify(
Isolate* isolate) {
TorqueGeneratedClassVerifiers::SourceTextModuleInfoEntryVerify(*this,
isolate);
CHECK_IMPLIES(IsString(import_name()), module_request() >= 0);
CHECK_IMPLIES(IsString(export_name()) && IsString(import_name()),
IsUndefined(local_name(), isolate));
}
void Module::ModuleVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::ModuleVerify(*this, isolate);
CHECK_EQ(status() == Module::kErrored, !IsTheHole(exception(), isolate));
CHECK(IsUndefined(module_namespace(), isolate) ||
IsJSModuleNamespace(module_namespace()));
if (IsJSModuleNamespace(module_namespace())) {
CHECK_LE(Module::kLinking, status());
CHECK_EQ(JSModuleNamespace::cast(module_namespace())->module(), *this);
}
if (!(status() == kErrored || status() == kEvaluating ||
status() == kEvaluated)) {
CHECK(IsUndefined(top_level_capability()));
}
CHECK_NE(hash(), 0);
}
void ModuleRequest::ModuleRequestVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::ModuleRequestVerify(*this, isolate);
CHECK_EQ(0,
import_attributes()->length() % ModuleRequest::kAttributeEntrySize);
for (int i = 0; i < import_attributes()->length();
i += ModuleRequest::kAttributeEntrySize) {
CHECK(IsString(import_attributes()->get(i))); // Attribute key
CHECK(IsString(import_attributes()->get(i + 1))); // Attribute value
CHECK(IsSmi(import_attributes()->get(i + 2))); // Attribute location
}
}
void SourceTextModule::SourceTextModuleVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::SourceTextModuleVerify(*this, isolate);
if (status() == kErrored) {
CHECK(IsSharedFunctionInfo(code()));
} else if (status() == kEvaluating || status() == kEvaluated) {
CHECK(IsJSGeneratorObject(code()));
} else {
if (status() == kLinked) {
CHECK(IsJSGeneratorObject(code()));
} else if (status() == kLinking) {
CHECK(IsJSFunction(code()));
} else if (status() == kPreLinking) {
CHECK(IsSharedFunctionInfo(code()));
} else if (status() == kUnlinked) {
CHECK(IsSharedFunctionInfo(code()));
}
CHECK(!AsyncParentModuleCount());
CHECK(!pending_async_dependencies());
CHECK(!IsAsyncEvaluating());
}
CHECK_EQ(requested_modules()->length(), info()->module_requests()->length());
}
void SyntheticModule::SyntheticModuleVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::SyntheticModuleVerify(*this, isolate);
for (int i = 0; i < export_names()->length(); i++) {
CHECK(IsString(export_names()->get(i)));
}
}
void PrototypeInfo::PrototypeInfoVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::PrototypeInfoVerify(*this, isolate);
if (IsWeakArrayList(prototype_users())) {
PrototypeUsers::Verify(WeakArrayList::cast(prototype_users()));
} else {
CHECK(IsSmi(prototype_users()));
}
Tagged<HeapObject> derived = derived_maps(isolate);
if (!IsUndefined(derived)) {
auto derived_list = WeakArrayList::cast(derived);
CHECK_GT(derived_list->length(), 0);
for (int i = 0; i < derived_list->length(); ++i) {
derived_list->Get(i).IsWeakOrCleared();
}
}
}
void PrototypeUsers::Verify(Tagged<WeakArrayList> array) {
if (array->length() == 0) {
// Allow empty & uninitialized lists.
return;
}
// Verify empty slot chain.
int empty_slot = Smi::ToInt(empty_slot_index(array));
int empty_slots_count = 0;
while (empty_slot != kNoEmptySlotsMarker) {
CHECK_GT(empty_slot, 0);
CHECK_LT(empty_slot, array->length());
empty_slot = array->Get(empty_slot).ToSmi().value();
++empty_slots_count;
}
// Verify that all elements are either weak pointers or SMIs marking empty
// slots.
int weak_maps_count = 0;
for (int i = kFirstIndex; i < array->length(); ++i) {
Tagged<HeapObject> heap_object;
Tagged<MaybeObject> object = array->Get(i);
if ((object.GetHeapObjectIfWeak(&heap_object) && IsMap(heap_object)) ||
object.IsCleared()) {
++weak_maps_count;
} else {
CHECK(IsSmi(object));
}
}
CHECK_EQ(weak_maps_count + empty_slots_count + 1, array->length());
}
void EnumCache::EnumCacheVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::EnumCacheVerify(*this, isolate);
Heap* heap = isolate->heap();
if (*this == ReadOnlyRoots(heap).empty_enum_cache()) {
CHECK_EQ(ReadOnlyRoots(heap).empty_fixed_array(), keys());
CHECK_EQ(ReadOnlyRoots(heap).empty_fixed_array(), indices());
}
}
void ObjectBoilerplateDescription::ObjectBoilerplateDescriptionVerify(
Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, Shape::kCapacityOffset)));
CHECK(
IsSmi(TaggedField<Object>::load(*this, Shape::kBackingStoreSizeOffset)));
CHECK(IsSmi(TaggedField<Object>::load(*this, Shape::kFlagsOffset)));
for (int i = 0; i < capacity(); ++i) {
CHECK(!IsThinString(get(i), isolate));
}
}
void ClassBoilerplate::ClassBoilerplateVerify(Isolate* isolate) {
CHECK(IsSmi(TaggedField<Object>::load(*this, kArgumentsCountOffset)));
Object::VerifyPointer(isolate, static_properties_template());
Object::VerifyPointer(isolate, static_elements_template());
Object::VerifyPointer(isolate, static_computed_properties());
CHECK(IsFixedArray(static_computed_properties()));
Object::VerifyPointer(isolate, instance_properties_template());
Object::VerifyPointer(isolate, instance_elements_template());
Object::VerifyPointer(isolate, instance_computed_properties());
CHECK(IsFixedArray(instance_computed_properties()));
}
#if V8_ENABLE_WEBASSEMBLY
void WasmTrustedInstanceData::WasmTrustedInstanceDataVerify(Isolate* isolate) {
// Check all tagged fields.
for (uint16_t offset : kTaggedFieldOffsets) {
VerifyObjectField(isolate, offset);
}
// Check all protected fields.
for (uint16_t offset : kProtectedFieldOffsets) {
VerifyProtectedPointerField(isolate, offset);
}
int num_dispatch_tables = dispatch_tables()->length();
for (int i = 0; i < num_dispatch_tables; ++i) {
Tagged<Object> table = dispatch_tables()->get(i);
if (table == Smi::zero()) continue;
CHECK(IsWasmDispatchTable(table));
if (i == 0) CHECK_EQ(table, dispatch_table0());
}
if (num_dispatch_tables == 0) CHECK_EQ(0, dispatch_table0()->length());
}
void WasmDispatchTable::WasmDispatchTableVerify(Isolate* isolate) {
TrustedObjectVerify(isolate);
int len = length();
CHECK_LE(len, capacity());
for (int i = 0; i < len; ++i) {
Tagged<Object> call_ref = ref(i);
Object::VerifyPointer(isolate, call_ref);
CHECK(IsWasmTrustedInstanceData(call_ref) ||
IsWasmApiFunctionRef(call_ref) || call_ref == Smi::zero());
CHECK_EQ(ref(i) == Smi::zero(), target(i) == kNullAddress);
}
}
void WasmValueObject::WasmValueObjectVerify(Isolate* isolate) {
JSObjectVerify(isolate);
CHECK(IsWasmValueObject(*this));
}
void WasmExceptionPackage::WasmExceptionPackageVerify(Isolate* isolate) {
JSObjectVerify(isolate);
CHECK(IsWasmExceptionPackage(*this));
}
void WasmExportedFunctionData::WasmExportedFunctionDataVerify(
Isolate* isolate) {
TorqueGeneratedClassVerifiers::WasmExportedFunctionDataVerify(*this, isolate);
Tagged<Code> wrapper = wrapper_code(isolate);
CHECK(wrapper->kind() == CodeKind::JS_TO_WASM_FUNCTION ||
wrapper->kind() == CodeKind::C_WASM_ENTRY ||
(wrapper->is_builtin() &&
(wrapper->builtin_id() == Builtin::kJSToWasmWrapper ||
wrapper->builtin_id() == Builtin::kWasmReturnPromiseOnSuspend)));
}
#endif // V8_ENABLE_WEBASSEMBLY
void DataHandler::DataHandlerVerify(Isolate* isolate) {
// Don't call TorqueGeneratedClassVerifiers::DataHandlerVerify because the
// Torque definition of this class includes all of the optional fields.
// This assertion exists to encourage updating this verification function if
// new fields are added in the Torque class layout definition.
static_assert(DataHandler::kHeaderSize == 6 * kTaggedSize);
StructVerify(isolate);
CHECK(IsDataHandler(*this));
Object::VerifyPointer(isolate, smi_handler(isolate));
CHECK_IMPLIES(!IsSmi(smi_handler()),
IsStoreHandler(*this) && IsCode(smi_handler()));
Object::VerifyPointer(isolate, validity_cell(isolate));
CHECK(IsSmi(validity_cell()) || IsCell(validity_cell()));
int data_count = data_field_count();
if (data_count >= 1) {
VerifyMaybeObjectField(isolate, kData1Offset);
}
if (data_count >= 2) {
VerifyMaybeObjectField(isolate, kData2Offset);
}
if (data_count >= 3) {
VerifyMaybeObjectField(isolate, kData3Offset);
}
}
void LoadHandler::LoadHandlerVerify(Isolate* isolate) {
DataHandler::DataHandlerVerify(isolate);
// TODO(ishell): check handler integrity
}
void StoreHandler::StoreHandlerVerify(Isolate* isolate) {
DataHandler::DataHandlerVerify(isolate);
// TODO(ishell): check handler integrity
}
void AllocationSite::AllocationSiteVerify(Isolate* isolate) {
CHECK(IsAllocationSite(*this));
CHECK(IsDependentCode(dependent_code()));
CHECK(IsSmi(transition_info_or_boilerplate()) ||
IsJSObject(transition_info_or_boilerplate()));
CHECK(IsAllocationSite(nested_site()) || nested_site() == Smi::zero());
}
void Script::ScriptVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::ScriptVerify(*this, isolate);
#if V8_ENABLE_WEBASSEMBLY
if (type() == Script::Type::kWasm) {
CHECK_EQ(line_ends(), ReadOnlyRoots(isolate).empty_fixed_array());
} else {
CHECK(CanHaveLineEnds());
}
#else // V8_ENABLE_WEBASSEMBLY
CHECK(CanHaveLineEnds());
#endif // V8_ENABLE_WEBASSEMBLY
for (int i = 0; i < shared_function_info_count(); ++i) {
Tagged<MaybeObject> maybe_object = shared_function_infos()->get(i);
Tagged<HeapObject> heap_object;
CHECK(maybe_object.IsWeak() || maybe_object.IsCleared() ||
(maybe_object.GetHeapObjectIfStrong(&heap_object) &&
IsUndefined(heap_object, isolate)));
}
}
void NormalizedMapCache::NormalizedMapCacheVerify(Isolate* isolate) {
WeakFixedArray::cast(*this)->WeakFixedArrayVerify(isolate);
if (v8_flags.enable_slow_asserts) {
for (int i = 0; i < length(); i++) {
Tagged<MaybeObject> e = WeakFixedArray::get(i);
Tagged<HeapObject> heap_object;
if (e.GetHeapObjectIfWeak(&heap_object)) {
Map::cast(heap_object)->DictionaryMapVerify(isolate);
} else {
CHECK(e.IsCleared() || (e.GetHeapObjectIfStrong(&heap_object) &&
IsUndefined(heap_object, isolate)));
}
}
}
}
void PreparseData::PreparseDataVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::PreparseDataVerify(*this, isolate);
CHECK_LE(0, data_length());
CHECK_LE(0, children_length());
for (int i = 0; i < children_length(); ++i) {
Tagged<Object> child = get_child_raw(i);
CHECK(IsNull(child) || IsPreparseData(child));
Object::VerifyPointer(isolate, child);
}
}
void CallSiteInfo::CallSiteInfoVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::CallSiteInfoVerify(*this, isolate);
#if V8_ENABLE_WEBASSEMBLY
CHECK_IMPLIES(IsAsmJsWasm(), IsWasm());
CHECK_IMPLIES(IsWasm(), IsWasmInstanceObject(receiver_or_instance()));
CHECK_IMPLIES(IsWasm() || IsBuiltin(), IsSmi(function()));
CHECK_IMPLIES(!IsWasm() && !IsBuiltin(), IsJSFunction(function()));
CHECK_IMPLIES(IsAsync(), !IsWasm());
CHECK_IMPLIES(IsConstructor(), !IsWasm());
#endif // V8_ENABLE_WEBASSEMBLY
}
void FunctionTemplateRareData::FunctionTemplateRareDataVerify(
Isolate* isolate) {
CHECK(IsFixedArray(c_function_overloads()) ||
IsUndefined(c_function_overloads(), isolate));
}
void StackFrameInfo::StackFrameInfoVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::StackFrameInfoVerify(*this, isolate);
}
void ErrorStackData::ErrorStackDataVerify(Isolate* isolate) {
TorqueGeneratedClassVerifiers::ErrorStackDataVerify(*this, isolate);
CHECK_IMPLIES(!IsFixedArray(call_site_infos_or_formatted_stack()),
IsFixedArray(limit_or_stack_frame_infos()));
}
void SloppyArgumentsElements::SloppyArgumentsElementsVerify(Isolate* isolate) {
FixedArrayBaseVerify(isolate);
{
auto o = context();
Object::VerifyPointer(isolate, o);
CHECK(IsContext(o));
}
{
auto o = arguments();
Object::VerifyPointer(isolate, o);
CHECK(IsFixedArray(o));
}
for (int i = 0; i < length(); ++i) {
auto o = mapped_entries(i, kRelaxedLoad);
CHECK(IsSmi(o) || IsTheHole(o));
}
}
// Helper class for verifying the string table.
class StringTableVerifier : public RootVisitor {
public:
explicit StringTableVerifier(Isolate* isolate) : isolate_(isolate) {}
void VisitRootPointers(Root root, const char* description,
FullObjectSlot start, FullObjectSlot end) override {
UNREACHABLE();
}
void VisitRootPointers(Root root, const char* description,
OffHeapObjectSlot start,
OffHeapObjectSlot end) override {
// Visit all HeapObject pointers in [start, end).
for (OffHeapObjectSlot p = start; p < end; ++p) {
Tagged<Object> o = p.load(isolate_);
DCHECK(!HasWeakHeapObjectTag(o));
if (IsHeapObject(o)) {
Tagged<HeapObject> object = HeapObject::cast(o);
// Check that the string is actually internalized.
CHECK(IsInternalizedString(object));
}
}
}
private:
Isolate* isolate_;
};
void StringTable::VerifyIfOwnedBy(Isolate* isolate) {
DCHECK_EQ(isolate->string_table(), this);
if (!isolate->OwnsStringTables()) return;
StringTableVerifier verifier(isolate);
IterateElements(&verifier);
}
#endif // VERIFY_HEAP
#ifdef DEBUG
void JSObject::IncrementSpillStatistics(Isolate* isolate,
SpillInformation* info) {
info->number_of_objects_++;
// Named properties
if (HasFastProperties()) {
info->number_of_objects_with_fast_properties_++;
info->number_of_fast_used_fields_ += map()->NextFreePropertyIndex();
info->number_of_fast_unused_fields_ += map()->UnusedPropertyFields();
} else if (IsJSGlobalObject(*this)) {
Tagged<GlobalDictionary> dict =
JSGlobalObject::cast(*this)->global_dictionary(kAcquireLoad);
info->number_of_slow_used_properties_ += dict->NumberOfElements();
info->number_of_slow_unused_properties_ +=
dict->Capacity() - dict->NumberOfElements();
} else if (V8_ENABLE_SWISS_NAME_DICTIONARY_BOOL) {
Tagged<SwissNameDictionary> dict = property_dictionary_swiss();
info->number_of_slow_used_properties_ += dict->NumberOfElements();
info->number_of_slow_unused_properties_ +=
dict->Capacity() - dict->NumberOfElements();
} else {
Tagged<NameDictionary> dict = property_dictionary();
info->number_of_slow_used_properties_ += dict->NumberOfElements();
info->number_of_slow_unused_properties_ +=
dict->Capacity() - dict->NumberOfElements();
}
// Indexed properties
switch (GetElementsKind()) {
case HOLEY_SMI_ELEMENTS:
case PACKED_SMI_ELEMENTS:
case HOLEY_DOUBLE_ELEMENTS:
case PACKED_DOUBLE_ELEMENTS:
case HOLEY_ELEMENTS:
case HOLEY_FROZEN_ELEMENTS:
case HOLEY_SEALED_ELEMENTS:
case HOLEY_NONEXTENSIBLE_ELEMENTS:
case PACKED_ELEMENTS:
case PACKED_FROZEN_ELEMENTS:
case PACKED_SEALED_ELEMENTS:
case PACKED_NONEXTENSIBLE_ELEMENTS:
case FAST_STRING_WRAPPER_ELEMENTS:
case SHARED_ARRAY_ELEMENTS: {
info->number_of_objects_with_fast_elements_++;
int holes = 0;
Tagged<FixedArray> e = FixedArray::cast(elements());
int len = e->length();
for (int i = 0; i < len; i++) {
if (IsTheHole(e->get(i), isolate)) holes++;
}
info->number_of_fast_used_elements_ += len - holes;
info->number_of_fast_unused_elements_ += holes;
break;
}
#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype) case TYPE##_ELEMENTS:
TYPED_ARRAYS(TYPED_ARRAY_CASE)
RAB_GSAB_TYPED_ARRAYS(TYPED_ARRAY_CASE)
#undef TYPED_ARRAY_CASE
{
info->number_of_objects_with_fast_elements_++;
Tagged<FixedArrayBase> e = FixedArrayBase::cast(elements());
info->number_of_fast_used_elements_ += e->length();
break;
}
case DICTIONARY_ELEMENTS:
case SLOW_STRING_WRAPPER_ELEMENTS: {
Tagged<NumberDictionary> dict = element_dictionary();
info->number_of_slow_used_elements_ += dict->NumberOfElements();
info->number_of_slow_unused_elements_ +=
dict->Capacity() - dict->NumberOfElements();
break;
}
case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
case WASM_ARRAY_ELEMENTS:
case NO_ELEMENTS:
break;
}
}
void JSObject::SpillInformation::Clear() {
number_of_objects_ = 0;
number_of_objects_with_fast_properties_ = 0;
number_of_objects_with_fast_elements_ = 0;
number_of_fast_used_fields_ = 0;
number_of_fast_unused_fields_ = 0;
number_of_slow_used_properties_ = 0;
number_of_slow_unused_properties_ = 0;
number_of_fast_used_elements_ = 0;
number_of_fast_unused_elements_ = 0;
number_of_slow_used_elements_ = 0;
number_of_slow_unused_elements_ = 0;
}
void JSObject::SpillInformation::Print() {
PrintF("\n JSObject Spill Statistics (#%d):\n", number_of_objects_);
PrintF(" - fast properties (#%d): %d (used) %d (unused)\n",
number_of_objects_with_fast_properties_, number_of_fast_used_fields_,
number_of_fast_unused_fields_);
PrintF(" - slow properties (#%d): %d (used) %d (unused)\n",
number_of_objects_ - number_of_objects_with_fast_properties_,
number_of_slow_used_properties_, number_of_slow_unused_properties_);
PrintF(" - fast elements (#%d): %d (used) %d (unused)\n",
number_of_objects_with_fast_elements_, number_of_fast_used_elements_,
number_of_fast_unused_elements_);
PrintF(" - slow elements (#%d): %d (used) %d (unused)\n",
number_of_objects_ - number_of_objects_with_fast_elements_,
number_of_slow_used_elements_, number_of_slow_unused_elements_);
PrintF("\n");
}
bool DescriptorArray::IsSortedNoDuplicates() {
Tagged<Name> current_key;
uint32_t current = 0;
for (int i = 0; i < number_of_descriptors(); i++) {
Tagged<Name> key = GetSortedKey(i);
uint32_t hash;
const bool has_hash = key->TryGetHash(&hash);
CHECK(has_hash);
if (key == current_key) {
Print(*this);
return false;
}
current_key = key;
if (hash < current) {
Print(*this);
return false;
}
current = hash;
}
return true;
}
bool TransitionArray::IsSortedNoDuplicates() {
Tagged<Name> prev_key;
PropertyKind prev_kind = PropertyKind::kData;
PropertyAttributes prev_attributes = NONE;
uint32_t prev_hash = 0;
for (int i = 0; i < number_of_transitions(); i++) {
Tagged<Name> key = GetSortedKey(i);
uint32_t hash;
const bool has_hash = key->TryGetHash(&hash);
CHECK(has_hash);
PropertyKind kind = PropertyKind::kData;
PropertyAttributes attributes = NONE;
if (!TransitionsAccessor::IsSpecialTransition(key->GetReadOnlyRoots(),
key)) {
Tagged<Map> target = GetTarget(i);
PropertyDetails details =
TransitionsAccessor::GetTargetDetails(key, target);
kind = details.kind();
attributes = details.attributes();
} else {
// Duplicate entries are not allowed for non-property transitions.
DCHECK_NE(prev_key, key);
}
int cmp = CompareKeys(prev_key, prev_hash, prev_kind, prev_attributes, key,
hash, kind, attributes);
if (cmp >= 0) {
Print(*this);
return false;
}
prev_key = key;
prev_hash = hash;
prev_attributes = attributes;
prev_kind = kind;
}
return true;
}
bool TransitionsAccessor::IsSortedNoDuplicates() {
// Simple and non-existent transitions are always sorted.
if (encoding() != kFullTransitionArray) return true;
return transitions()->IsSortedNoDuplicates();
}
static bool CheckOneBackPointer(Tagged<Map> current_map, Tagged<Map> target) {
return target->GetBackPointer() == current_map;
}
bool TransitionsAccessor::IsConsistentWithBackPointers() {
int num_transitions = NumberOfTransitions();
for (int i = 0; i < num_transitions; i++) {
Tagged<Map> target = GetTarget(i);
// Ensure maps belong to the same NativeContext (i.e. have the same
// meta map).
DCHECK_EQ(map_->map(), target->map());
if (!CheckOneBackPointer(map_, target)) return false;
}
return true;
}
#undef USE_TORQUE_VERIFIER
#endif // DEBUG
} // namespace internal
} // namespace v8