Fixes for il2cpp debugger running with Visual Studio for Mac:

* Returning an empty "list" of custom attributes for types, fields,
properties, and methods instead of a not-implemented error.
* Updating debugger ASSEMBLY_GET_NAME command to use Il2Cpp code for
generating the fully qualified name with public key tokens.  The Mono
code generates invalid strings for the token with the Il2Cpp assembly
name data, which will cause the VSfM debug client to disconnect.

Author: Brian Raderman

mono/mini/debugger-agent.c

@@ -9418,14 +9418,17 @@ assembly_commands (int command, guint8 *p, guint8 *end, Buffer *buf)
 	case CMD_ASSEMBLY_GET_NAME: {
 		gchar *name;
 		MonoAssembly *mass = ass;
+#ifdef RUNTIME_IL2CPP
+        name = il2cpp_assembly_get_full_name(mass);
+#else
 		name = g_strdup_printf (
 		  "%s, Version=%d.%d.%d.%d, Culture=%s, PublicKeyToken=%s%s",
 		  mass->aname.name,
 		  mass->aname.major, mass->aname.minor, mass->aname.build, mass->aname.revision,
 		  mass->aname.culture && *mass->aname.culture ? mass->aname.culture : "neutral",
 		  mass->aname.public_key_token[0] ? (char *)mass->aname.public_key_token : "null",
 		  (mass->aname.flags & ASSEMBLYREF_RETARGETABLE_FLAG) ? ", Retargetable=Yes" : "");
-
+#endif
 		buffer_add_string (buf, name);
 		g_free (name);
 		break;
@@ -9775,7 +9778,8 @@ type_commands_internal (int command, MonoClass *klass, MonoDomain *domain, guint
 			return err;
 		break;
 #else
-		return ERR_NOT_IMPLEMENTED;
+        buffer_add_int (buf, 0);
+        return ERR_NONE;
 #endif //RUNTIME_IL2CPP
 	}
 	case CMD_TYPE_GET_FIELD_CATTRS: {
@@ -9802,7 +9806,8 @@ type_commands_internal (int command, MonoClass *klass, MonoDomain *domain, guint
 			return err;
 		break;
 #else
-		return ERR_NOT_IMPLEMENTED;
+        buffer_add_int (buf, 0);
+        return ERR_NONE;
 #endif //RUNTIME_IL2CPP
 	}
 	case CMD_TYPE_GET_PROPERTY_CATTRS: {
@@ -9829,7 +9834,8 @@ type_commands_internal (int command, MonoClass *klass, MonoDomain *domain, guint
 			return err;
 		break;
 #else
-		return ERR_NOT_IMPLEMENTED;
+        buffer_add_int (buf, 0);
+        return ERR_NONE;
 #endif //RUNTIME_IL2CPP
 	}
 	case CMD_TYPE_GET_VALUES:
@@ -10707,7 +10713,8 @@ method_commands_internal (int command, MonoMethod *method, MonoDomain *domain, g
 			return err;
 		break;
 #else
-		return ERR_NOT_IMPLEMENTED;
+        buffer_add_int (buf, 0);
+        return ERR_NONE;
 #endif //RUNTIME_IL2CPP
 	}
 	case CMD_METHOD_MAKE_GENERIC_METHOD: {

mono/mini/il2cpp-compat.h

@@ -445,5 +445,6 @@ MonoClass* il2cpp_generic_class_get_container_class(MonoGenericClass *gclass);
 void il2cpp_mono_thread_detach(MonoThread* thread);
 MonoClass* il2cpp_mono_get_string_class (void);
 Il2CppSequencePoint* il2cpp_get_sequence_point(int id);
+char* il2cpp_assembly_get_full_name(MonoAssembly *assembly);
 
 #endif // RUNTIME_IL2CPP

mono/mini/il2cpp-stubs.cpp

@@ -1490,5 +1490,12 @@ Il2CppSequencePoint* il2cpp_get_sequence_point(int id)
     return NULL;
 #endif
 }
+    
+char* il2cpp_assembly_get_full_name(MonoAssembly *assembly)
+{
+    std::string s = il2cpp::vm::AssemblyName::AssemblyNameToString(assembly->aname);
+    return g_strdup(s.c_str());
+}
+
 }
 #endif // RUNTIME_IL2CPP