// Copyright 2018 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_INSTRUCTION_STREAM_H_
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#define V8_INSTRUCTION_STREAM_H_
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#include "src/base/macros.h"
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#include "src/globals.h"
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namespace v8 {
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namespace internal {
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class Code;
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class Isolate;
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// Wraps an off-heap instruction stream.
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// TODO(jgruber,v8:6666): Remove this class.
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class InstructionStream final : public AllStatic {
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public:
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// Returns true, iff the given pc points into an off-heap instruction stream.
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static bool PcIsOffHeap(Isolate* isolate, Address pc);
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// Returns the corresponding Code object if it exists, and nullptr otherwise.
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static Code* TryLookupCode(Isolate* isolate, Address address);
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// During snapshot creation, we first create an executable off-heap area
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// containing all off-heap code. The area is guaranteed to be contiguous.
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// Note that this only applies when building the snapshot, e.g. for
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// mksnapshot. Otherwise, off-heap code is embedded directly into the binary.
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static void CreateOffHeapInstructionStream(Isolate* isolate, uint8_t** data,
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uint32_t* size);
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static void FreeOffHeapInstructionStream(uint8_t* data, uint32_t size);
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_INSTRUCTION_STREAM_H_
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