| // 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_ |