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package org.graalvm.wasm;
import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.Truffle;
import com.oracle.truffle.api.TruffleLanguage;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.RootNode;
import org.graalvm.options.OptionDescriptors;
import org.graalvm.wasm.api.WebAssembly;
import org.graalvm.wasm.memory.UnsafeWasmMemory;
import org.graalvm.wasm.memory.WasmMemory;
@TruffleLanguage.Registration(id = "wasm", name = "WebAssembly", defaultMimeType = "application/wasm", byteMimeTypes = "application/wasm", contextPolicy = TruffleLanguage.ContextPolicy.EXCLUSIVE, fileTypeDetectors = WasmFileDetector.class, //
interactive = false)
public final class WasmLanguage extends TruffleLanguage<WasmContext> {
private boolean isFirst = true;
@Override
protected WasmContext createContext(Env env) {
WasmContext context = new WasmContext(env, this);
if (env.isPolyglotBindingsAccessAllowed()) {
env.exportSymbol("WebAssembly", new WebAssembly(context));
}
return context;
}
@Override
protected CallTarget parse(ParsingRequest request) {
final WasmContext context = getCurrentContext();
final String moduleName = isFirst ? "main" : request.getSource().getName();
isFirst = false;
final byte[] data = request.getSource().getBytes().toByteArray();
final WasmModule module = context.readModule(moduleName, data, null);
final WasmInstance instance = context.readInstance(module);
return Truffle.getRuntime().createCallTarget(new RootNode(this) {
@Override
public WasmInstance execute(VirtualFrame frame) {
return instance;
}
});
}
@Override
protected Object getScope(WasmContext context) {
return context.getScope();
}
@Override
protected OptionDescriptors getOptionDescriptors() {
return new WasmOptionsOptionDescriptors();
}
static WasmContext getCurrentContext() {
return getCurrentContext(WasmLanguage.class);
}
@Override
protected void finalizeContext(WasmContext context) {
super.finalizeContext(context);
for (int i = 0; i < context.memories().count(); ++i) {
final WasmMemory memory = context.memories().memory(i);
if (memory instanceof UnsafeWasmMemory) {
((UnsafeWasmMemory) memory).free();
}
}
}
}