45ff2fe12f
This prepares for exposing operations like Memory.Grow while keeping the ability to trace what did that, by adding a `context.Context` initial parameter. This adds this to all API methods that mutate or return mutated data. Before, we made a change to trace functions and general lifecycle commands, but we missed this part. Ex. We track functions, but can't track what closed the module, changed memory or a mutable constant. Changing to do this now is not only more consistent, but helps us optimize at least the interpreter to help users identify otherwise opaque code that can cause harm. This is critical before we add more functions that can cause harm, such as Memory.Grow. Signed-off-by: Adrian Cole <adrian@tetrate.io>
89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
//go:build amd64 && cgo && wasmedge
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// wasmedge depends on manual installation of a shared library, so is guarded by a flag by default.
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package vs
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import (
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"context"
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"fmt"
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"github.com/second-state/WasmEdge-go/wasmedge"
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)
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func init() {
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runtimes["WasmEdge-go"] = newWasmedgeRuntime
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}
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func newWasmedgeRuntime() runtime {
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return &wasmedgeRuntime{}
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}
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type wasmedgeRuntime struct {
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conf *wasmedge.Configure
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}
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type wasmedgeModule struct {
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store *wasmedge.Store
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vm *wasmedge.VM
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}
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func (r *wasmedgeRuntime) Compile(_ context.Context, _ *runtimeConfig) (err error) {
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r.conf = wasmedge.NewConfigure()
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// We can't re-use a store because "module name conflict" occurs even after releasing a VM
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return
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}
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func (r *wasmedgeRuntime) Instantiate(_ context.Context, cfg *runtimeConfig) (mod module, err error) {
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m := &wasmedgeModule{store: wasmedge.NewStore()}
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m.vm = wasmedge.NewVMWithConfigAndStore(r.conf, m.store)
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if err = m.vm.RegisterWasmBuffer(cfg.moduleName, cfg.moduleWasm); err != nil {
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return
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}
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if err = m.vm.LoadWasmBuffer(cfg.moduleWasm); err != nil {
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return
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}
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if err = m.vm.Validate(); err != nil {
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return
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}
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if err = m.vm.Instantiate(); err != nil {
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return
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}
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for _, funcName := range cfg.funcNames {
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if fn := m.vm.GetFunctionType(funcName); fn == nil {
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err = fmt.Errorf("%s is not an exported function", funcName)
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return
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}
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}
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mod = m
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return
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}
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func (r *wasmedgeRuntime) Close(_ context.Context) error {
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if conf := r.conf; conf != nil {
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conf.Release()
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}
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r.conf = nil
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return nil
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}
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func (m *wasmedgeModule) CallI64_I64(_ context.Context, funcName string, param uint64) (uint64, error) {
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if result, err := m.vm.Execute(funcName, int64(param)); err != nil {
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return 0, err
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} else {
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return uint64(result[0].(int64)), nil
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}
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}
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func (m *wasmedgeModule) Close(_ context.Context) error {
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if vm := m.vm; vm != nil {
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vm.Release()
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}
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m.vm = nil
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if store := m.store; store != nil {
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store.Release()
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}
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m.store = nil
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return nil
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}
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