// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_OBJECTS_COMPILATION_CACHE_INL_H_
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#define V8_OBJECTS_COMPILATION_CACHE_INL_H_
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#include "src/objects/compilation-cache.h"
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#include "src/objects/name-inl.h"
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#include "src/objects/script-inl.h"
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#include "src/objects/shared-function-info.h"
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#include "src/objects/string.h"
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// Has to be the last include (doesn't have include guards):
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#include "src/objects/object-macros.h"
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namespace v8 {
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namespace internal {
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CAST_ACCESSOR(CompilationCacheTable)
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uint32_t CompilationCacheShape::RegExpHash(String* string, Smi* flags) {
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return string->Hash() + flags->value();
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}
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uint32_t CompilationCacheShape::StringSharedHash(String* source,
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SharedFunctionInfo* shared,
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LanguageMode language_mode,
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int position) {
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uint32_t hash = source->Hash();
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if (shared->HasSourceCode()) {
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// Instead of using the SharedFunctionInfo pointer in the hash
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// code computation, we use a combination of the hash of the
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// script source code and the start position of the calling scope.
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// We do this to ensure that the cache entries can survive garbage
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// collection.
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Script* script(Script::cast(shared->script()));
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hash ^= String::cast(script->source())->Hash();
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STATIC_ASSERT(LanguageModeSize == 2);
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if (is_strict(language_mode)) hash ^= 0x8000;
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hash += position;
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}
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return hash;
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}
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uint32_t CompilationCacheShape::HashForObject(Isolate* isolate,
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Object* object) {
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if (object->IsNumber()) return static_cast<uint32_t>(object->Number());
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FixedArray* val = FixedArray::cast(object);
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if (val->map() == val->GetReadOnlyRoots().fixed_cow_array_map()) {
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DCHECK_EQ(4, val->length());
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SharedFunctionInfo* shared = SharedFunctionInfo::cast(val->get(0));
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String* source = String::cast(val->get(1));
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int language_unchecked = Smi::ToInt(val->get(2));
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DCHECK(is_valid_language_mode(language_unchecked));
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LanguageMode language_mode = static_cast<LanguageMode>(language_unchecked);
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int position = Smi::ToInt(val->get(3));
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return StringSharedHash(source, shared, language_mode, position);
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}
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DCHECK_LT(2, val->length());
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return RegExpHash(String::cast(val->get(JSRegExp::kSourceIndex)),
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Smi::cast(val->get(JSRegExp::kFlagsIndex)));
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}
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} // namespace internal
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} // namespace v8
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#include "src/objects/object-macros-undef.h"
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#endif // V8_OBJECTS_COMPILATION_CACHE_INL_H_
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