src: use TryCatch.SetVerbose(true)

Signed-off-by: Darshan Sen <raisinten@gmail.com>

Author: RaisinTen

lib/dgram.js

@@ -159,7 +159,7 @@ function startListening(socket) {
   const state = socket[kStateSymbol];
 
   state.handle.onmessage = onMessage;
-  // Todo: handle errors
+  state.handle.onerror = onError;
   state.handle.recvStart();
   state.receiving = true;
   state.bindState = BIND_STATE_BOUND;
@@ -923,6 +923,12 @@ function onMessage(nread, handle, buf, rinfo) {
 }
 
 
+function onError(nread, handle, error) {
+  const self = handle[owner_symbol];
+  return self.emit('error', error);
+}
+
+
 Socket.prototype.ref = function() {
   const handle = this[kStateSymbol].handle;
 

src/udp_wrap.cc

@@ -22,13 +22,15 @@
 #include "udp_wrap.h"
 #include "env-inl.h"
 #include "node_buffer.h"
+#include "node_errors.h"
 #include "node_sockaddr-inl.h"
 #include "handle_wrap.h"
 #include "req_wrap-inl.h"
 #include "util-inl.h"
 
 namespace node {
 
+using errors::TryCatchScope;
 using v8::Array;
 using v8::ArrayBuffer;
 using v8::BackingStore;
@@ -729,10 +731,32 @@ void UDPWrap::OnRecv(ssize_t nread,
   }
 
   Local<Object> address;
-  if (!AddressToJS(env, addr).ToLocal(&address)) return;
+  {
+    TryCatchScope try_catch(env);
+    try_catch.SetVerbose(true);
+    DCHECK(try_catch.IsVerbose());
+    if (!AddressToJS(env, addr).ToLocal(&address)) {
+      DCHECK(try_catch.HasCaught() && !try_catch.HasTerminated());
+      argv[2] = try_catch.Exception();
+      DCHECK(!argv[2].IsEmpty());
+      MakeCallback(env->onerror_string(), arraysize(argv), argv);
+      return;
+    }
+  }
 
   Local<ArrayBuffer> ab = ArrayBuffer::New(isolate, std::move(bs));
-  argv[2] = Buffer::New(env, ab, 0, ab->ByteLength()).ToLocalChecked();
+  {
+    TryCatchScope try_catch(env);
+    try_catch.SetVerbose(true);
+    DCHECK(try_catch.IsVerbose());
+    if (!Buffer::New(env, ab, 0, ab->ByteLength()).ToLocal(&argv[2])) {
+      DCHECK(try_catch.HasCaught() && !try_catch.HasTerminated());
+      argv[2] = try_catch.Exception();
+      DCHECK(!argv[2].IsEmpty());
+      MakeCallback(env->onerror_string(), arraysize(argv), argv);
+      return;
+    }
+  }
   argv[3] = address;
   MakeCallback(env->onmessage_string(), arraysize(argv), argv);
 }