From a67650f4be5d0a12d033321ecde3855bf7ff1d56 Mon Sep 17 00:00:00 2001 From: Yang Guo Date: Thu, 4 Oct 2018 14:25:50 +0200 Subject: deps: V8: cherry-pick 64-bit hash seed commits This serves as mitigation for the so-called HashWick vulnerability. Original commit messages: commit 3833fef57368c53c6170559ffa524c8c69f16ee5 Author: Yang Guo Date: Thu Sep 20 11:43:13 2018 Refactor integer hashing function names We now clearly differentiate between: - unseeded hash for 32-bit integers - unseeded hash for 64-bit integers - seeded hash for 32-bit integers - seeded hash for strings R=bmeurer@chromium.org Bug: chromium:680662 Change-Id: I7459958c4158ee3501c962943dff8f33258bb5ce Reviewed-on: https://chromium-review.googlesource.com/1235973 Commit-Queue: Yang Guo Reviewed-by: Benedikt Meurer Cr-Commit-Position: refs/heads/master@{#56068} commit 95a979e02d7154e45b293261a6998c99d71fc238 Author: Yang Guo Date: Thu Sep 20 14:34:48 2018 Call into C++ to compute seeded integer hash R=bmeurer@chromium.org Bug: chromium:680662 Change-Id: I8dace89d576dfcc5833fd539ce698a9ade1cb5a0 Reviewed-on: https://chromium-review.googlesource.com/1235928 Commit-Queue: Yang Guo Reviewed-by: Benedikt Meurer Cr-Commit-Position: refs/heads/master@{#56091} commit 2c2af0022d5feb9e525a00a76cb15db9f3e38dba Author: Yang Guo Date: Thu Sep 27 16:37:57 2018 Use 64-bit for seeded integer hashes R=petermarshall@chromium.org Bug: chromium:680662 Change-Id: If48d1043dbe1e1bb695ec890c23e103a6cacf2d4 Reviewed-on: https://chromium-review.googlesource.com/1244220 Commit-Queue: Yang Guo Reviewed-by: Peter Marshall Cr-Commit-Position: refs/heads/master@{#56271} Refs: https://github.com/nodejs/node/issues/23259 PR-URL: https://github.com/nodejs/node/pull/23264 Reviewed-By: Matteo Collina Reviewed-By: Anna Henningsen Reviewed-By: Ali Ijaz Sheikh Reviewed-By: James M Snell Reviewed-By: Michael Dawson --- deps/v8/src/builtins/builtins-collections-gen.cc | 11 ++-- deps/v8/src/code-stub-assembler.cc | 69 ++++++----------------- deps/v8/src/code-stub-assembler.h | 8 +-- deps/v8/src/compiler/effect-control-linearizer.cc | 6 +- deps/v8/src/compiler/effect-control-linearizer.h | 2 +- deps/v8/src/external-reference.cc | 9 +++ deps/v8/src/external-reference.h | 1 + deps/v8/src/frames.cc | 2 +- deps/v8/src/objects-inl.h | 12 ++-- deps/v8/src/objects/bigint.h | 2 +- deps/v8/src/objects/ordered-hash-table.h | 2 +- deps/v8/src/profiler/allocation-tracker.cc | 2 +- deps/v8/src/profiler/heap-snapshot-generator.cc | 2 +- deps/v8/src/profiler/heap-snapshot-generator.h | 4 +- deps/v8/src/profiler/profile-generator.cc | 12 ++-- deps/v8/src/profiler/profile-generator.h | 2 +- deps/v8/src/utils.h | 18 +++--- deps/v8/test/cctest/test-code-stub-assembler.cc | 12 +--- 18 files changed, 69 insertions(+), 107 deletions(-) (limited to 'deps') diff --git a/deps/v8/src/builtins/builtins-collections-gen.cc b/deps/v8/src/builtins/builtins-collections-gen.cc index 5808d2a98ca..aab0475e21b 100644 --- a/deps/v8/src/builtins/builtins-collections-gen.cc +++ b/deps/v8/src/builtins/builtins-collections-gen.cc @@ -689,7 +689,7 @@ class CollectionsBuiltinsAssembler : public BaseCollectionsAssembler { Node* key_tagged, Variable* result, Label* entry_found, Label* not_found); - Node* ComputeIntegerHashForString(Node* context, Node* string_key); + Node* ComputeStringHash(Node* context, Node* string_key); void SameValueZeroString(Node* context, Node* key_string, Node* candidate_key, Label* if_same, Label* if_not_same); @@ -846,8 +846,7 @@ void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForSmiKey( Node* table, Node* smi_key, Variable* result, Label* entry_found, Label* not_found) { Node* const key_untagged = SmiUntag(smi_key); - Node* const hash = - ChangeInt32ToIntPtr(ComputeIntegerHash(key_untagged, Int32Constant(0))); + Node* const hash = ChangeInt32ToIntPtr(ComputeUnseededHash(key_untagged)); CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0))); result->Bind(hash); FindOrderedHashTableEntry( @@ -862,7 +861,7 @@ template void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForStringKey( Node* context, Node* table, Node* key_tagged, Variable* result, Label* entry_found, Label* not_found) { - Node* const hash = ComputeIntegerHashForString(context, key_tagged); + Node* const hash = ComputeStringHash(context, key_tagged); CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0))); result->Bind(hash); FindOrderedHashTableEntry( @@ -920,8 +919,8 @@ void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForOtherKey( result, entry_found, not_found); } -Node* CollectionsBuiltinsAssembler::ComputeIntegerHashForString( - Node* context, Node* string_key) { +Node* CollectionsBuiltinsAssembler::ComputeStringHash(Node* context, + Node* string_key) { VARIABLE(var_result, MachineType::PointerRepresentation()); Label hash_not_computed(this), done(this, &var_result); diff --git a/deps/v8/src/code-stub-assembler.cc b/deps/v8/src/code-stub-assembler.cc index 2527e89a250..5bd780b520b 100644 --- a/deps/v8/src/code-stub-assembler.cc +++ b/deps/v8/src/code-stub-assembler.cc @@ -253,40 +253,6 @@ HEAP_IMMUTABLE_IMMOVABLE_OBJECT_LIST(HEAP_CONSTANT_ACCESSOR); HEAP_IMMOVABLE_OBJECT_LIST(HEAP_CONSTANT_TEST); #undef HEAP_CONSTANT_TEST -TNode CodeStubAssembler::HashSeed() { - DCHECK(Is64()); - TNode hash_seed_root = - TNode::UncheckedCast(LoadRoot(Heap::kHashSeedRootIndex)); - return TNode::UncheckedCast(LoadObjectField( - hash_seed_root, ByteArray::kHeaderSize, MachineType::Int64())); -} - -TNode CodeStubAssembler::HashSeedHigh() { - DCHECK(!Is64()); -#ifdef V8_TARGET_BIG_ENDIAN - static int kOffset = 0; -#else - static int kOffset = kInt32Size; -#endif - TNode hash_seed_root = - TNode::UncheckedCast(LoadRoot(Heap::kHashSeedRootIndex)); - return TNode::UncheckedCast(LoadObjectField( - hash_seed_root, ByteArray::kHeaderSize + kOffset, MachineType::Int32())); -} - -TNode CodeStubAssembler::HashSeedLow() { - DCHECK(!Is64()); -#ifdef V8_TARGET_BIG_ENDIAN - static int kOffset = kInt32Size; -#else - static int kOffset = 0; -#endif - TNode hash_seed_root = - TNode::UncheckedCast(LoadRoot(Heap::kHashSeedRootIndex)); - return TNode::UncheckedCast(LoadObjectField( - hash_seed_root, ByteArray::kHeaderSize + kOffset, MachineType::Int32())); -} - Node* CodeStubAssembler::IntPtrOrSmiConstant(int value, ParameterMode mode) { if (mode == SMI_PARAMETERS) { return SmiConstant(value); @@ -7709,14 +7675,9 @@ template void CodeStubAssembler::NameDictionaryLookup( TNode, TNode, Label*, TVariable*, Label*, int, LookupMode); -Node* CodeStubAssembler::ComputeIntegerHash(Node* key) { - return ComputeIntegerHash(key, IntPtrConstant(kZeroHashSeed)); -} - -Node* CodeStubAssembler::ComputeIntegerHash(Node* key, Node* seed) { - // See v8::internal::ComputeIntegerHash() +Node* CodeStubAssembler::ComputeUnseededHash(Node* key) { + // See v8::internal::ComputeUnseededHash() Node* hash = TruncateIntPtrToInt32(key); - hash = Word32Xor(hash, seed); hash = Int32Add(Word32Xor(hash, Int32Constant(0xFFFFFFFF)), Word32Shl(hash, Int32Constant(15))); hash = Word32Xor(hash, Word32Shr(hash, Int32Constant(12))); @@ -7727,6 +7688,21 @@ Node* CodeStubAssembler::ComputeIntegerHash(Node* key, Node* seed) { return Word32And(hash, Int32Constant(0x3FFFFFFF)); } +Node* CodeStubAssembler::ComputeSeededHash(Node* key) { + Node* const function_addr = + ExternalConstant(ExternalReference::compute_integer_hash()); + Node* const isolate_ptr = + ExternalConstant(ExternalReference::isolate_address(isolate())); + + MachineType type_ptr = MachineType::Pointer(); + MachineType type_uint32 = MachineType::Uint32(); + + Node* const result = + CallCFunction2(type_uint32, type_ptr, type_uint32, function_addr, + isolate_ptr, TruncateIntPtrToInt32(key)); + return result; +} + void CodeStubAssembler::NumberDictionaryLookup( TNode dictionary, TNode intptr_index, Label* if_found, TVariable* var_entry, Label* if_not_found) { @@ -7737,16 +7713,7 @@ void CodeStubAssembler::NumberDictionaryLookup( TNode capacity = SmiUntag(GetCapacity(dictionary)); TNode mask = IntPtrSub(capacity, IntPtrConstant(1)); - TNode int32_seed; - - if (Is64()) { - int32_seed = TruncateInt64ToInt32(HashSeed()); - } else { - int32_seed = HashSeedLow(); - } - - TNode hash = - ChangeUint32ToWord(ComputeIntegerHash(intptr_index, int32_seed)); + TNode hash = ChangeUint32ToWord(ComputeSeededHash(intptr_index)); Node* key_as_float64 = RoundIntPtrToFloat64(intptr_index); // See Dictionary::FirstProbe(). diff --git a/deps/v8/src/code-stub-assembler.h b/deps/v8/src/code-stub-assembler.h index 51ed647412b..38fc9717de0 100644 --- a/deps/v8/src/code-stub-assembler.h +++ b/deps/v8/src/code-stub-assembler.h @@ -450,10 +450,6 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler { HEAP_IMMOVABLE_OBJECT_LIST(HEAP_CONSTANT_TEST) #undef HEAP_CONSTANT_TEST - TNode HashSeed(); - TNode HashSeedHigh(); - TNode HashSeedLow(); - Node* IntPtrOrSmiConstant(int value, ParameterMode mode); TNode LanguageModeConstant(LanguageMode mode) { return SmiConstant(static_cast(mode)); @@ -2288,8 +2284,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler { int inlined_probes = kInlinedDictionaryProbes, LookupMode mode = kFindExisting); - Node* ComputeIntegerHash(Node* key); - Node* ComputeIntegerHash(Node* key, Node* seed); + Node* ComputeUnseededHash(Node* key); + Node* ComputeSeededHash(Node* key); void NumberDictionaryLookup(TNode dictionary, TNode intptr_index, Label* if_found, diff --git a/deps/v8/src/compiler/effect-control-linearizer.cc b/deps/v8/src/compiler/effect-control-linearizer.cc index 9b12c022c49..4bb4f8df776 100644 --- a/deps/v8/src/compiler/effect-control-linearizer.cc +++ b/deps/v8/src/compiler/effect-control-linearizer.cc @@ -4768,8 +4768,8 @@ Node* EffectControlLinearizer::LowerFindOrderedHashMapEntry(Node* node) { } } -Node* EffectControlLinearizer::ComputeIntegerHash(Node* value) { - // See v8::internal::ComputeIntegerHash() +Node* EffectControlLinearizer::ComputeUnseededHash(Node* value) { + // See v8::internal::ComputeUnseededHash() value = __ Int32Add(__ Word32Xor(value, __ Int32Constant(0xFFFFFFFF)), __ Word32Shl(value, __ Int32Constant(15))); value = __ Word32Xor(value, __ Word32Shr(value, __ Int32Constant(12))); @@ -4787,7 +4787,7 @@ Node* EffectControlLinearizer::LowerFindOrderedHashMapEntryForInt32Key( Node* key = NodeProperties::GetValueInput(node, 1); // Compute the integer hash code. - Node* hash = ChangeUint32ToUintPtr(ComputeIntegerHash(key)); + Node* hash = ChangeUint32ToUintPtr(ComputeUnseededHash(key)); Node* number_of_buckets = ChangeSmiToIntPtr(__ LoadField( AccessBuilder::ForOrderedHashTableBaseNumberOfBuckets(), table)); diff --git a/deps/v8/src/compiler/effect-control-linearizer.h b/deps/v8/src/compiler/effect-control-linearizer.h index aa174ed45e8..272bc445996 100644 --- a/deps/v8/src/compiler/effect-control-linearizer.h +++ b/deps/v8/src/compiler/effect-control-linearizer.h @@ -182,7 +182,7 @@ class V8_EXPORT_PRIVATE EffectControlLinearizer { Node* BuildFloat64RoundDown(Node* value); Node* BuildFloat64RoundTruncate(Node* input); Node* BuildUint32Mod(Node* lhs, Node* rhs); - Node* ComputeIntegerHash(Node* value); + Node* ComputeUnseededHash(Node* value); Node* LowerStringComparison(Callable const& callable, Node* node); Node* IsElementsKindGreaterThan(Node* kind, ElementsKind reference_kind); diff --git a/deps/v8/src/external-reference.cc b/deps/v8/src/external-reference.cc index 8f6bf22d385..0fbde95a1cb 100644 --- a/deps/v8/src/external-reference.cc +++ b/deps/v8/src/external-reference.cc @@ -764,6 +764,15 @@ ExternalReference ExternalReference::jsreceiver_create_identity_hash( return ExternalReference(Redirect(FUNCTION_ADDR(f))); } +static uint32_t ComputeSeededIntegerHash(Isolate* isolate, uint32_t key) { + DisallowHeapAllocation no_gc; + return ComputeSeededHash(key, isolate->heap()->HashSeed()); +} + +ExternalReference ExternalReference::compute_integer_hash() { + return ExternalReference(Redirect(FUNCTION_ADDR(ComputeSeededIntegerHash))); +} + ExternalReference ExternalReference::copy_fast_number_jsarray_elements_to_typed_array() { return ExternalReference( diff --git a/deps/v8/src/external-reference.h b/deps/v8/src/external-reference.h index 2f779469826..fb3ec07c8bf 100644 --- a/deps/v8/src/external-reference.h +++ b/deps/v8/src/external-reference.h @@ -83,6 +83,7 @@ class StatsCounter; V(address_of_uint32_bias, "uint32_bias") \ V(bytecode_size_table_address, "Bytecodes::bytecode_size_table_address") \ V(check_object_type, "check_object_type") \ + V(compute_integer_hash, "ComputeSeededHash") \ V(compute_output_frames_function, "Deoptimizer::ComputeOutputFrames()") \ V(copy_fast_number_jsarray_elements_to_typed_array, \ "copy_fast_number_jsarray_elements_to_typed_array") \ diff --git a/deps/v8/src/frames.cc b/deps/v8/src/frames.cc index e5751e2bb70..9dee01698e3 100644 --- a/deps/v8/src/frames.cc +++ b/deps/v8/src/frames.cc @@ -2133,7 +2133,7 @@ InnerPointerToCodeCache::InnerPointerToCodeCacheEntry* InnerPointerToCodeCache::GetCacheEntry(Address inner_pointer) { isolate_->counters()->pc_to_code()->Increment(); DCHECK(base::bits::IsPowerOfTwo(kInnerPointerToCodeCacheSize)); - uint32_t hash = ComputeIntegerHash( + uint32_t hash = ComputeUnseededHash( ObjectAddressForHashing(reinterpret_cast(inner_pointer))); uint32_t index = hash & (kInnerPointerToCodeCacheSize - 1); InnerPointerToCodeCacheEntry* entry = cache(index); diff --git a/deps/v8/src/objects-inl.h b/deps/v8/src/objects-inl.h index 05b2b9653fd..ed3e15ed9e9 100644 --- a/deps/v8/src/objects-inl.h +++ b/deps/v8/src/objects-inl.h @@ -2980,14 +2980,14 @@ bool NumberDictionaryBaseShape::IsMatch(uint32_t key, Object* other) { } uint32_t NumberDictionaryBaseShape::Hash(Isolate* isolate, uint32_t key) { - return ComputeIntegerHash(key, isolate->heap()->HashSeed()); + return ComputeSeededHash(key, isolate->heap()->HashSeed()); } uint32_t NumberDictionaryBaseShape::HashForObject(Isolate* isolate, Object* other) { DCHECK(other->IsNumber()); - return ComputeIntegerHash(static_cast(other->Number()), - isolate->heap()->HashSeed()); + return ComputeSeededHash(static_cast(other->Number()), + isolate->heap()->HashSeed()); } Handle NumberDictionaryBaseShape::AsHandle(Isolate* isolate, @@ -3067,18 +3067,18 @@ uint32_t ObjectHashTableShape::HashForObject(Isolate* isolate, Object* other) { Object* Object::GetSimpleHash(Object* object) { DisallowHeapAllocation no_gc; if (object->IsSmi()) { - uint32_t hash = ComputeIntegerHash(Smi::ToInt(object)); + uint32_t hash = ComputeUnseededHash(Smi::ToInt(object)); return Smi::FromInt(hash & Smi::kMaxValue); } if (object->IsHeapNumber()) { double num = HeapNumber::cast(object)->value(); if (std::isnan(num)) return Smi::FromInt(Smi::kMaxValue); - // Use ComputeIntegerHash for all values in Signed32 range, including -0, + // Use ComputeUnseededHash for all values in Signed32 range, including -0, // which is considered equal to 0 because collections use SameValueZero. uint32_t hash; // Check range before conversion to avoid undefined behavior. if (num >= kMinInt && num <= kMaxInt && FastI2D(FastD2I(num)) == num) { - hash = ComputeIntegerHash(FastD2I(num)); + hash = ComputeUnseededHash(FastD2I(num)); } else { hash = ComputeLongHash(double_to_uint64(num)); } diff --git a/deps/v8/src/objects/bigint.h b/deps/v8/src/objects/bigint.h index f8c5c3dbf69..a30a4779dee 100644 --- a/deps/v8/src/objects/bigint.h +++ b/deps/v8/src/objects/bigint.h @@ -137,7 +137,7 @@ class V8_EXPORT_PRIVATE BigInt : public BigIntBase { bool ToBoolean() { return !is_zero(); } uint32_t Hash() { // TODO(jkummerow): Improve this. At least use length and sign. - return is_zero() ? 0 : ComputeIntegerHash(static_cast(digit(0))); + return is_zero() ? 0 : ComputeLongHash(static_cast(digit(0))); } static bool EqualToString(Isolate* isolate, Handle x, diff --git a/deps/v8/src/objects/ordered-hash-table.h b/deps/v8/src/objects/ordered-hash-table.h index 20f3fe2eda6..0ee0f71c5c8 100644 --- a/deps/v8/src/objects/ordered-hash-table.h +++ b/deps/v8/src/objects/ordered-hash-table.h @@ -144,7 +144,7 @@ class OrderedHashTable : public OrderedHashTableBase { // This special cases for Smi, so that we avoid the HandleScope // creation below. if (key->IsSmi()) { - uint32_t hash = ComputeIntegerHash(Smi::ToInt(key)); + uint32_t hash = ComputeUnseededHash(Smi::ToInt(key)); return HashToEntry(hash & Smi::kMaxValue); } HandleScope scope(isolate); diff --git a/deps/v8/src/profiler/allocation-tracker.cc b/deps/v8/src/profiler/allocation-tracker.cc index 21843325f93..e5b31397855 100644 --- a/deps/v8/src/profiler/allocation-tracker.cc +++ b/deps/v8/src/profiler/allocation-tracker.cc @@ -239,7 +239,7 @@ void AllocationTracker::AllocationEvent(Address addr, int size) { static uint32_t SnapshotObjectIdHash(SnapshotObjectId id) { - return ComputeIntegerHash(static_cast(id)); + return ComputeUnseededHash(static_cast(id)); } diff --git a/deps/v8/src/profiler/heap-snapshot-generator.cc b/deps/v8/src/profiler/heap-snapshot-generator.cc index 96ac785273c..5d98a98b8ea 100644 --- a/deps/v8/src/profiler/heap-snapshot-generator.cc +++ b/deps/v8/src/profiler/heap-snapshot-generator.cc @@ -535,7 +535,7 @@ SnapshotObjectId HeapObjectsMap::GenerateId(v8::RetainedObjectInfo* info) { heap_->HashSeed()); intptr_t element_count = info->GetElementCount(); if (element_count != -1) { - id ^= ComputeIntegerHash(static_cast(element_count)); + id ^= ComputeUnseededHash(static_cast(element_count)); } return id << 1; } diff --git a/deps/v8/src/profiler/heap-snapshot-generator.h b/deps/v8/src/profiler/heap-snapshot-generator.h index f28852fdc21..f25bee9f464 100644 --- a/deps/v8/src/profiler/heap-snapshot-generator.h +++ b/deps/v8/src/profiler/heap-snapshot-generator.h @@ -309,7 +309,7 @@ class HeapEntriesMap { private: static uint32_t Hash(HeapThing thing) { - return ComputeIntegerHash( + return ComputeUnseededHash( static_cast(reinterpret_cast(thing))); } @@ -520,7 +520,7 @@ class NativeObjectsExplorer { struct RetainedInfoHasher { std::size_t operator()(v8::RetainedObjectInfo* info) const { - return ComputeIntegerHash(static_cast(info->GetHash())); + return ComputeUnseededHash(static_cast(info->GetHash())); } }; struct RetainedInfoEquals { diff --git a/deps/v8/src/profiler/profile-generator.cc b/deps/v8/src/profiler/profile-generator.cc index c0c5242219c..d60da5a44df 100644 --- a/deps/v8/src/profiler/profile-generator.cc +++ b/deps/v8/src/profiler/profile-generator.cc @@ -84,16 +84,16 @@ CodeEntry* CodeEntry::UnresolvedEntryCreateTrait::Create() { } uint32_t CodeEntry::GetHash() const { - uint32_t hash = ComputeIntegerHash(tag()); + uint32_t hash = ComputeUnseededHash(tag()); if (script_id_ != v8::UnboundScript::kNoScriptId) { - hash ^= ComputeIntegerHash(static_cast(script_id_)); - hash ^= ComputeIntegerHash(static_cast(position_)); + hash ^= ComputeUnseededHash(static_cast(script_id_)); + hash ^= ComputeUnseededHash(static_cast(position_)); } else { - hash ^= ComputeIntegerHash( + hash ^= ComputeUnseededHash( static_cast(reinterpret_cast(name_))); - hash ^= ComputeIntegerHash( + hash ^= ComputeUnseededHash( static_cast(reinterpret_cast(resource_name_))); - hash ^= ComputeIntegerHash(line_number_); + hash ^= ComputeUnseededHash(line_number_); } return hash; } diff --git a/deps/v8/src/profiler/profile-generator.h b/deps/v8/src/profiler/profile-generator.h index 8eef05bcdb3..ac9506ab219 100644 --- a/deps/v8/src/profiler/profile-generator.h +++ b/deps/v8/src/profiler/profile-generator.h @@ -243,7 +243,7 @@ class ProfileNode { }; struct Hasher { std::size_t operator()(CodeEntryAndLineNumber pair) const { - return pair.code_entry->GetHash() ^ ComputeIntegerHash(pair.line_number); + return pair.code_entry->GetHash() ^ ComputeUnseededHash(pair.line_number); } }; diff --git a/deps/v8/src/utils.h b/deps/v8/src/utils.h index 9f4bb08614a..f4669524a72 100644 --- a/deps/v8/src/utils.h +++ b/deps/v8/src/utils.h @@ -476,10 +476,9 @@ class BitSetComputer { static const uint64_t kZeroHashSeed = 0; // Thomas Wang, Integer Hash Functions. -// http://www.concentric.net/~Ttwang/tech/inthash.htm -inline uint32_t ComputeIntegerHash(uint32_t key, uint64_t seed) { +// http://www.concentric.net/~Ttwang/tech/inthash.htm` +inline uint32_t ComputeUnseededHash(uint32_t key) { uint32_t hash = key; - hash = hash ^ static_cast(seed); hash = ~hash + (hash << 15); // hash = (hash << 15) - hash - 1; hash = hash ^ (hash >> 12); hash = hash + (hash << 2); @@ -489,10 +488,6 @@ inline uint32_t ComputeIntegerHash(uint32_t key, uint64_t seed) { return hash & 0x3fffffff; } -inline uint32_t ComputeIntegerHash(uint32_t key) { - return ComputeIntegerHash(key, kZeroHashSeed); -} - inline uint32_t ComputeLongHash(uint64_t key) { uint64_t hash = key; hash = ~hash + (hash << 18); // hash = (hash << 18) - hash - 1; @@ -501,17 +496,20 @@ inline uint32_t ComputeLongHash(uint64_t key) { hash = hash ^ (hash >> 11); hash = hash + (hash << 6); hash = hash ^ (hash >> 22); - return static_cast(hash); + return static_cast(hash & 0x3fffffff); } +inline uint32_t ComputeSeededHash(uint32_t key, uint64_t seed) { + return ComputeLongHash(static_cast(key) ^ seed); +} inline uint32_t ComputePointerHash(void* ptr) { - return ComputeIntegerHash( + return ComputeUnseededHash( static_cast(reinterpret_cast(ptr))); } inline uint32_t ComputeAddressHash(Address address) { - return ComputeIntegerHash(static_cast(address & 0xFFFFFFFFul)); + return ComputeUnseededHash(static_cast(address & 0xFFFFFFFFul)); } // ---------------------------------------------------------------------------- diff --git a/deps/v8/test/cctest/test-code-stub-assembler.cc b/deps/v8/test/cctest/test-code-stub-assembler.cc index d7cdb39933f..2036e134505 100644 --- a/deps/v8/test/cctest/test-code-stub-assembler.cc +++ b/deps/v8/test/cctest/test-code-stub-assembler.cc @@ -332,15 +332,7 @@ TEST(ComputeIntegerHash) { CodeAssemblerTester asm_tester(isolate, kNumParams); CodeStubAssembler m(asm_tester.state()); - TNode int32_seed; - if (m.Is64()) { - int32_seed = m.TruncateInt64ToInt32(m.HashSeed()); - } else { - int32_seed = m.HashSeedLow(); - } - - m.Return(m.SmiFromInt32( - m.ComputeIntegerHash(m.SmiUntag(m.Parameter(0)), int32_seed))); + m.Return(m.SmiFromInt32(m.ComputeSeededHash(m.SmiUntag(m.Parameter(0))))); FunctionTester ft(asm_tester.GenerateCode(), kNumParams); @@ -352,7 +344,7 @@ TEST(ComputeIntegerHash) { Handle key(Smi::FromInt(k), isolate); Handle result = ft.Call(key).ToHandleChecked(); - uint32_t hash = ComputeIntegerHash(k, isolate->heap()->HashSeed()); + uint32_t hash = ComputeSeededHash(k, isolate->heap()->HashSeed()); Smi* expected = Smi::FromInt(hash & Smi::kMaxValue); CHECK_EQ(expected, Smi::cast(*result)); } -- cgit v1.2.3