Vyacheslav Egorov
f496e538f4
This is the next step towards preventing compiler from directly peeking into runtime and instead interact with runtime through a well defined surface. The goal of the refactoring to locate all places where compiler accesses some runtime information and partion those accesses into two categories: - creating objects in the host runtime (e.g. allocating strings, numbers, etc) during compilation; - accessing properties of the target runtime (e.g. offsets of fields) to embed those into the generated code; This change introduces dart::compiler and dart::compiler::target namespaces. All code in the compiler will gradually be moved into dart::compiler namespace. One of the motivations for this change is to be able to prevent access to globally defined host constants like kWordSize by shadowing them in the dart::compiler namespace. The nested namespace dart::compiler::target hosts all information about target runtime that compiler could access, e.g. compiler::target::kWordSize defines word size of the target which will eventually be made different from the host kWordSize (defined by dart::kWordSize). The API for compiler to runtime interaction is placed into compiler_api.h. Note that we still permit runtime to access compiler internals directly - this is not going to be decoupled as part of this work. Issue https://github.com/dart-lang/sdk/issues/31709 Change-Id: If4396d295879391becfa6c38d4802bbff81f5b20 Reviewed-on: https://dart-review.googlesource.com/c/90242 Commit-Queue: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_MEGAMORPHIC_CACHE_TABLE_H_
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#define RUNTIME_VM_MEGAMORPHIC_CACHE_TABLE_H_
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#include "vm/allocation.h"
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namespace dart {
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namespace compiler {
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class ObjectPoolBuilder;
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}
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class Array;
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class Function;
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class Isolate;
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class ObjectPointerVisitor;
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class RawArray;
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class RawFunction;
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class RawCode;
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class RawMegamorphicCache;
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class RawString;
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class String;
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class MegamorphicCacheTable : public AllStatic {
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public:
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static RawFunction* miss_handler(Isolate* isolate);
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NOT_IN_PRECOMPILED(static void InitMissHandler(Isolate* isolate));
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// Re-initializes the megamorphic miss handler function in the object store.
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//
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// Normally we initialize the megamorphic miss handler during isolate startup.
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// Though if we AOT compile with bare instructions support, we need to
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// re-generate the handler to ensure it uses the common object pool.
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NOT_IN_PRECOMPILED(
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static void ReInitMissHandlerCode(Isolate* isolate,
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compiler::ObjectPoolBuilder* wrapper));
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static RawMegamorphicCache* Lookup(Isolate* isolate,
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const String& name,
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const Array& descriptor);
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static void PrintSizes(Isolate* isolate);
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};
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} // namespace dart
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#endif // RUNTIME_VM_MEGAMORPHIC_CACHE_TABLE_H_
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