examples(js stdout node): add example using new api, switch wasm modu…

…le used in example

js/packages/observe-sdk-stdout/test/node/index.js

@@ -1,28 +1,61 @@
 const fs = require("fs");
 const { WASI } = require("wasi");
 const { StdOutAdapter } = require("@dylibso/observe-sdk-stdout");
+//const { StdOutAdapter } = require("../../dist/cjs/index.js");
 const { env, argv } = require('node:process')
 
-const wasi = new WASI({
-  version: 'preview1',
-  args: argv.slice(1),
-  env,
-});
+const bytes = fs.readFileSync("../../../observe-api/test/cxx_guest_2.wasm");
 
-const adapter = new StdOutAdapter();
-const bytes = fs.readFileSync("../../test-data/test.c.instr.wasm");
-adapter.start(bytes, {
-  spanFilter: {
-    minDurationMicroseconds: 0,
-  }
-}).then((traceContext) => {
-  const module = new WebAssembly.Module(bytes);
+// old (verbose) api
+{
+  const wasi = new WASI({
+    version: 'preview1',
+    args: argv.slice(1),
+    env,
+  });
+  const adapter = new StdOutAdapter();
+  adapter.start(bytes, {
+    spanFilter: {
+      minDurationMicroseconds: 0,
+    }
+  }).then((traceContext) => {
+    const module = new WebAssembly.Module(bytes);
+
+    WebAssembly.instantiate(module, {
+      ...wasi.getImportObject(),
+      ...traceContext.getImportObject(),
+    }).then((instance) => {
+      traceContext.initSpanEnter(instance.exports.memory.buffer);
+      wasi.start(instance);
+      traceContext.stop();
+    });
+  });
+}
 
-  WebAssembly.instantiate(module, {
-    ...wasi.getImportObject(),
-    ...traceContext.getImportObject(),
-  }).then((instance) => {
-    wasi.start(instance);
-    traceContext.stop();
+// new API using instantiateWasm
+// SetTimeout as temporary hack as demangling multiple modules at the same time fails:
+// TypeError: wasm.__wbindgen_add_to_stack_pointer is not a function
+{
+  const wasi = new WASI({
+    version: 'preview1',
+    args: argv.slice(1),
+    env,
   });
-});
+  const adapter = new StdOutAdapter();
+  setTimeout(() => {
+    adapter.start(bytes, {
+      spanFilter: {
+        minDurationMicroseconds: 0,
+      },
+      instantiateWasm: async (module, traceContext) => {
+        return WebAssembly.instantiate(module, {
+          ...wasi.getImportObject(),
+          ...traceContext.getImportObject(),
+        });
+      }
+    }).then(({ collector: traceContext, instance }) => {
+      wasi.start(instance);
+      traceContext.stop()
+    });
+  }, 5000);
+}