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