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// Copyright 2017 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.
#ifndef V8_OBJECTS_COMPILATION_CACHE_INL_H_
#define V8_OBJECTS_COMPILATION_CACHE_INL_H_
#include "src/objects/compilation-cache.h"
#include "src/objects/name-inl.h"
#include "src/objects/script-inl.h"
#include "src/objects/shared-function-info.h"
#include "src/objects/smi.h"
#include "src/objects/string.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
CompilationCacheTable::CompilationCacheTable(Address ptr)
: HashTable<CompilationCacheTable, CompilationCacheShape>(ptr) {
SLOW_DCHECK(IsCompilationCacheTable());
}
NEVER_READ_ONLY_SPACE_IMPL(CompilationCacheTable)
CAST_ACCESSOR(CompilationCacheTable)
uint32_t CompilationCacheShape::RegExpHash(String string, Smi flags) {
return string.Hash() + flags.value();
}
uint32_t CompilationCacheShape::StringSharedHash(String source,
SharedFunctionInfo shared,
LanguageMode language_mode,
int position) {
uint32_t hash = source.Hash();
if (shared.HasSourceCode()) {
// Instead of using the SharedFunctionInfo pointer in the hash
// code computation, we use a combination of the hash of the
// script source code and the start position of the calling scope.
// We do this to ensure that the cache entries can survive garbage
// collection.
Script script(Script::cast(shared.script()));
hash ^= String::cast(script.source()).Hash();
STATIC_ASSERT(LanguageModeSize == 2);
if (is_strict(language_mode)) hash ^= 0x8000;
hash += position;
}
return hash;
}
uint32_t CompilationCacheShape::HashForObject(ReadOnlyRoots roots,
Object object) {
if (object.IsNumber()) return static_cast<uint32_t>(object.Number());
FixedArray val = FixedArray::cast(object);
if (val.map() == roots.fixed_cow_array_map()) {
DCHECK_EQ(4, val.length());
SharedFunctionInfo shared = SharedFunctionInfo::cast(val.get(0));
String source = String::cast(val.get(1));
int language_unchecked = Smi::ToInt(val.get(2));
DCHECK(is_valid_language_mode(language_unchecked));
LanguageMode language_mode = static_cast<LanguageMode>(language_unchecked);
int position = Smi::ToInt(val.get(3));
return StringSharedHash(source, shared, language_mode, position);
}
DCHECK_LT(2, val.length());
return RegExpHash(String::cast(val.get(JSRegExp::kSourceIndex)),
Smi::cast(val.get(JSRegExp::kFlagsIndex)));
}
InfoCellPair::InfoCellPair(SharedFunctionInfo shared,
FeedbackCell feedback_cell)
: is_compiled_scope_(!shared.is_null() ? shared.is_compiled_scope()
: IsCompiledScope()),
shared_(shared),
feedback_cell_(feedback_cell) {}
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_COMPILATION_CACHE_INL_H_