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// Copyright 2014 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/execution/arguments-inl.h"
#include "src/heap/factory.h"
#include "src/heap/heap-inl.h" // For ToBoolean. TODO(jkummerow): Drop.
#include "src/logging/counters.h"
#include "src/numbers/conversions-inl.h"
#include "src/objects/hash-table-inl.h"
#include "src/objects/js-collection-inl.h"
#include "src/runtime/runtime-utils.h"
namespace v8 {
namespace internal {
RUNTIME_FUNCTION(Runtime_TheHole) {
SealHandleScope shs(isolate);
DCHECK_EQ(0, args.length());
return ReadOnlyRoots(isolate).the_hole_value();
}
RUNTIME_FUNCTION(Runtime_SetGrow) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()), isolate);
MaybeHandle<OrderedHashSet> table_candidate =
OrderedHashSet::EnsureGrowable(isolate, table);
if (!table_candidate.ToHandle(&table)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError(MessageTemplate::kValueOutOfRange));
}
holder->set_table(*table);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_SetShrink) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()), isolate);
table = OrderedHashSet::Shrink(isolate, table);
holder->set_table(*table);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_MapShrink) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()), isolate);
table = OrderedHashMap::Shrink(isolate, table);
holder->set_table(*table);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_MapGrow) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()), isolate);
MaybeHandle<OrderedHashMap> table_candidate =
OrderedHashMap::EnsureGrowable(isolate, table);
if (!table_candidate.ToHandle(&table)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError(MessageTemplate::kValueOutOfRange));
}
holder->set_table(*table);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_WeakCollectionDelete) {
HandleScope scope(isolate);
DCHECK_EQ(3, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
CONVERT_SMI_ARG_CHECKED(hash, 2)
#ifdef DEBUG
DCHECK(key->IsJSReceiver());
DCHECK(EphemeronHashTableShape::IsLive(ReadOnlyRoots(isolate), *key));
Handle<EphemeronHashTable> table(
EphemeronHashTable::cast(weak_collection->table()), isolate);
// Should only be called when shrinking the table is necessary. See
// HashTable::Shrink().
DCHECK(table->NumberOfElements() - 1 <= (table->Capacity() >> 2) &&
table->NumberOfElements() - 1 >= 16);
#endif
bool was_present = JSWeakCollection::Delete(weak_collection, key, hash);
return isolate->heap()->ToBoolean(was_present);
}
RUNTIME_FUNCTION(Runtime_WeakCollectionSet) {
HandleScope scope(isolate);
DCHECK_EQ(4, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
CONVERT_SMI_ARG_CHECKED(hash, 3)
#ifdef DEBUG
DCHECK(key->IsJSReceiver());
DCHECK(EphemeronHashTableShape::IsLive(ReadOnlyRoots(isolate), *key));
Handle<EphemeronHashTable> table(
EphemeronHashTable::cast(weak_collection->table()), isolate);
// Should only be called when rehashing or resizing the table is necessary.
// See EphemeronHashTable::Put() and HashTable::HasSufficientCapacityToAdd().
DCHECK((table->NumberOfDeletedElements() << 1) > table->NumberOfElements() ||
!table->HasSufficientCapacityToAdd(1));
#endif
JSWeakCollection::Set(weak_collection, key, value, hash);
return *weak_collection;
}
} // namespace internal
} // namespace v8