Refactored to split common code between Manticore and Angr out into common.py. Implemented the new deferred streaming stuff, it seems to work semi-well for this simple cases I've tested, but there's still work to do. The latest code has some remaining issues. Printing out the final input bytes in Angr shows the wrong thing, although what gets streamed out is right. This is visible when running mctest-angr examples/ArtihmeticProperties. With Manticore, the big issue is that it doesn't properly pickle smt expressions (or something to this effect), so I'm ending up with multiple definitions of the same stuff and that throws exceptions. This is tricky to deal with because the streaming of output needs to be able to save symbolic data.

examples/StreamingAndFormatting.cpp

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017 Trail of Bits, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <mctest/McUnit.hpp>
+
+TEST(Streaming, BasicLevels) {
+  LOG(DEBUG) << "This is a debug message";
+  LOG(INFO) << "This is an info message";
+  LOG(WARNING) << "This is a warning message";
+  LOG(ERROR) << "This is a error message";
+  LOG(INFO) << "This is a info message again";
+  ASSERT(true) << "This should not be printed.";
+}
+
+TEST(Streaming, BasicTypes) {
+  LOG(INFO) << 'a';
+  LOG(INFO) << 1;
+  LOG(INFO) << 1.0;
+  LOG(INFO) << "string";
+  LOG(INFO) << nullptr;
+}
+
+TEST(Formatting, OverridePrintf) {
+  printf("hello string=%s hex_lower=%x hex_upper=%X octal=%o char=%c dec=%d"
+         "double=%f sci=%e SCI=%E pointer=%p",
+         "world", 999, 999, 999, 'a', 999, 999.0, 999.0, 999.0, "world");
+}
+
+int main(void) {
+  return McTest_Run();
+}