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105 lines
3.5 KiB
Markdown
105 lines
3.5 KiB
Markdown
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WAMR Go binding: Embedding WAMR in Go guideline
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===============================================
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This Go library uses CGO to consume the runtime APIs of the WAMR project which are defined in [core/iwasm/include/wasm_export.h](../../core/iwasm/include/wasm_export.h). The API details are available in the header files.
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## Installation
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### Installing from the source code
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Installing from local source tree is in _development mode_.
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Run `./build.sh` in this folder to build the package, which builds the WAMR runtime library firstly and then builds the Go binding library.
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Run `./build.sh` under `samples` folder to build and test the sample.
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```bash
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cd samples
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./build.sh
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```
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## Supported APIs
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All the embedding APIs supported are defined under folder [wamr](./wamr).
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### Runtime APIs
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```Go
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func Runtime() *_Runtime
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func (self *_Runtime) FullInit(alloc_with_pool bool, heap_buf []byte,
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max_thread_num uint) error
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func (self *_Runtime) Init() error
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func (self *_Runtime) Destroy()
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func (self *_Runtime) SetLogLevel(level LogLevel)
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func (self *_Runtime) Malloc(size uint32) *uint8
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func (self *_Runtime) Free(ptr *uint8)
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```
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### Module APIs
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```Go
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func NewModule(wasmBytes []byte) (*Module, error)
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func (self *Module) Destroy()
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func (self *Module) SetWasiArgs(dirList [][]byte, mapDirList [][]byte,
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env [][]byte, argv[][]byte)
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func (self *Module) SetWasiArgsEx(dirList [][]byte, mapDirList [][]byte,
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env [][]byte, argv[][]byte,
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stdinfd int, stdoutfd int, stderrfd int)
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func (self *Module) SetWasiAddrPool(addrPool [][]byte)
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```
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### Instance APIs
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```Go
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func NewInstance(module *Module,
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stackSize uint, heapSize uint) (*Instance, error)
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func (self *Instance) Destroy()
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func (self *Instance) CallFunc(funcName string,
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argc uint32, args []uint32) error
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func (self *Instance) CallFuncV(funcName string,
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num_results uint32, results []interface{},
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args ... interface{}) error
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func (self *Instance) GetException() string
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func (self Instance) ModuleMalloc(size uint32) (uint32, *uint8)
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func (self Instance) ModuleFree(offset uint32)
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func (self Instance) ValidateAppAddr(app_offset uint32, size uint32) bool
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func (self Instance) ValidateNativeAddr(native_ptr *uint8, size uint32) bool
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func (self Instance) AddrAppToNative(app_offset uint32) *uint8
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func (self Instance) AddrNativeToApp(native_ptr *uint8) uint32
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func (self Instance) GetAppAddrRange(app_offset uint32) (bool, uint32, uint32)
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func (self Instance) GetNativeAddrRange(native_ptr *uint8) (bool, *uint8, *uint8)
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func (self Instance) DumpMemoryConsumption()
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func (self Instance) DumpCallStack()
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```
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## Sample codes
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```Go
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var module *wamr.Module
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var instance *wamr.Instance
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var results []interface{}
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var err error
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/* Runtime initialization */
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err = wamr.Runtime().FullInit(false, nil, 1)
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/* Read WASM/AOT file into a memory buffer */
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wasmBytes := read_wasm_binary_to_buffer(...)
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/* Load WASM/AOT module from the memory buffer */
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module, err = wamr.NewModule(wasmBytes)
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/* Create WASM/AOT instance from the module */
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instance, err = wamr.NewInstance(module, 16384, 16384)
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/* Call the `fib` function */
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results = make([]interface{}, 1, 1)
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err = instance.CallFuncV("fib", 1, results, (int32)32)
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fmt.Printf("fib(32) return: %d\n", results[0].(int32));
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/* Destroy runtime */
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wamr.Runtime().Destroy()
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```
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More samples can be found in [test.go](./samples/test.go)
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