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https://github.com/bytecodealliance/wasm-micro-runtime.git
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2f45911641
Import basic codes of GC feature: - Add basic GC related macros, data structures and APIs - Change WASMType to WASMFuncType/AOTFuncType and re-org interp/aot codes - Import GC opcodes and add empty opcode handling in loader and interpreter - Implement type section loading to resolve func/struct/array type - Implement is_subtype_of for func/struct/array, implement struct field offset calculation - Add -G option for test_wamr.sh to test GC spec cases Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#ifndef _GC_OBJECT_H_
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#define _GC_OBJECT_H_
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#include "gc_type.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Object header of a WASM object, can be a pointer of
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* defined type (WASMFuncType/WASMStructType or WASMArrayType),
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* or rtt type (WASMRttObject),
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* or ExternRef type (bit_1 = 1).
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* And use bit_0 to mark whether it is an weakref object.
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*/
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typedef uintptr_t WASMObjectHeader;
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/* Representation of WASM objects. */
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typedef struct WASMObject {
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WASMObjectHeader header;
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} WASMObject, *WASMObjectRef;
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/* Representation of WASM struct objects. */
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typedef struct WASMStructObject {
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WASMObject super_;
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} WASMStructObject;
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/* Representation of WASM array objects. */
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typedef struct WASMArrayObject {
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WASMObject super_;
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/* (<array length> << 2) | <array element size>,
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* actual_length = lenght >> 2
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* elem_size = 2 ^ (length & 0x3)
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*/
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uint32 length;
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} WASMArrayObject;
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/* Representation of WASM function objects. */
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typedef struct WASMFuncObject {
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WASMObject super_;
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} WASMFuncObject;
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/* Representation of WASM externref objects. */
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typedef struct WASMExternrefObject {
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WASMObject super_;
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} WASMExternrefObject;
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/* Representation of WASM rtt objects. */
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typedef struct WASMRttObject {
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/* type must be 2, denotes an Rtt object */
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uintptr_t type;
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/* 0/1/2 means it is rtt object of
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func/struct/array type */
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uint16 flag;
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uint16 n;
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WASMType *defined_type;
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struct WASMRttObject *root;
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struct WASMRttObject *parent;
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} WASMRttObject;
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#ifdef __cplusplus
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} /* end of extern "C" */
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#endif
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#endif /* end of _GC_OBJECT_H_ */
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