rpcrt4: Dereference interface pointers in union arms.

Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/rpcrt4/ndr_marshall.c

@@ -5745,6 +5745,10 @@ static unsigned char *union_arm_marshall(PMIDL_STUB_MESSAGE pStubMsg, unsigned c
                   pStubMsg->Buffer = saved_buffer + 4;
                 }
                 break;
+            case RPC_FC_IP:
+                /* must be dereferenced first */
+                m(pStubMsg, *(unsigned char **)pMemory, desc);
+                break;
             default:
                 m(pStubMsg, pMemory, desc);
             }
@@ -5814,6 +5818,10 @@ static unsigned char *union_arm_unmarshall(PMIDL_STUB_MESSAGE pStubMsg,
                   pStubMsg->Buffer = saved_buffer + 4;
                 }
                 break;
+            case RPC_FC_IP:
+                /* must be dereferenced first */
+                m(pStubMsg, *(unsigned char ***)ppMemory, desc, fMustAlloc);
+                break;
             default:
                 m(pStubMsg, ppMemory, desc, fMustAlloc);
             }
@@ -5868,6 +5876,10 @@ static void union_arm_buffer_size(PMIDL_STUB_MESSAGE pStubMsg,
                     pStubMsg->BufferLength = saved_buffer_length;
                 }
                 break;
+            case RPC_FC_IP:
+                /* must be dereferenced first */
+                m(pStubMsg, *(unsigned char **)pMemory, desc);
+                break;
             default:
                 m(pStubMsg, pMemory, desc);
             }
@@ -5955,6 +5967,10 @@ static void union_arm_free(PMIDL_STUB_MESSAGE pStubMsg,
             case RPC_FC_FP:
                 PointerFree(pStubMsg, *(unsigned char **)pMemory, desc);
                 break;
+            case RPC_FC_IP:
+                /* must be dereferenced first */
+                m(pStubMsg, *(unsigned char **)pMemory, desc);
+                break;
             default:
                 m(pStubMsg, pMemory, desc);
             }

dlls/rpcrt4/tests/server.c

@@ -844,6 +844,15 @@ void __cdecl s_stop(void)
   }
 }
 
+void __cdecl s_ip_test(ipu_t *a)
+{
+    STATSTG st;
+    HRESULT hr;
+
+    hr = IStream_Stat(a->tagged_union.stream, &st, STATFLAG_NONAME);
+    ok(hr == S_OK, "got %#x\n", hr);
+}
+
 static void
 make_cmdline(char buffer[MAX_PATH], const char *test)
 {
@@ -1044,6 +1053,8 @@ union_tests(void)
   encu_t eu;
   unencu_t uneu;
   sun_t su;
+  ipu_t ipu;
+  LONG ref;
   int i;
 
   su.s = SUN_I;
@@ -1084,6 +1095,15 @@ union_tests(void)
   eue.t = E2;
   eue.tagged_union.f2 = 10.0;
   ok(square_encue(&eue) == 100.0, "RPC square_encue\n");
+
+  CoInitializeEx(NULL, COINIT_MULTITHREADED);
+
+  CreateStreamOnHGlobal(NULL, TRUE, &ipu.tagged_union.stream);
+  ip_test(&ipu);
+  ref = IStream_Release(ipu.tagged_union.stream);
+  ok(!ref, "got %u refs\n", ref);
+
+  CoUninitialize();
 }
 
 static test_list_t *
@@ -1701,6 +1721,9 @@ server(void)
   RPC_STATUS status, iptcp_status, np_status, ncalrpc_status;
   DWORD ret;
 
+  /* needed for tests involving interface pointers */
+  CoInitializeEx(NULL, COINIT_MULTITHREADED);
+
   iptcp_status = RpcServerUseProtseqEpA(iptcp, 20, port, NULL);
   ok(iptcp_status == RPC_S_OK, "RpcServerUseProtseqEp(ncacn_ip_tcp) failed with status %d\n", iptcp_status);
 
@@ -1766,6 +1789,8 @@ server(void)
 
   CloseHandle(stop_event);
   stop_event = NULL;
+
+  CoUninitialize();
 }
 
 static DWORD WINAPI listen_test_client_thread(void *binding)

dlls/rpcrt4/tests/server.idl

@@ -21,6 +21,8 @@
 #pragma makedep client
 #pragma makedep server
 
+import "objidl.idl";
+
 #include "server_defines.h"
 
 typedef struct tag_vector
@@ -383,4 +385,11 @@ cpp_quote("#endif")
   void authinfo_test(unsigned int protseq, int secure);
 
   void stop(void);
+
+  typedef union ipu switch(int t)
+  {
+    default: IStream *stream;
+  } ipu_t;
+
+  void ip_test([in] ipu_t *a);
 }