Add KLEE example

examples/CMakeLists.txt

@@ -46,3 +46,6 @@ set_target_properties(Squares PROPERTIES COMPILE_DEFINITIONS "DEEPSTATE_TEST")
 
 add_executable(TakeOver TakeOver.cpp)
 target_link_libraries(TakeOver deepstate)
+
+add_executable(Klee Klee.c)
+target_link_libraries(Klee deepstate)

examples/Klee.c

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2018 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 <deepstate/Klee.h>
+
+DEEPSTATE_NOINLINE int get_sign(int x) {
+  if (x == 0) {
+    printf("zero\n");
+    return 0;
+  }
+
+  if (x < 0) {
+    printf("negative\n");
+    return -1;
+  } else {
+    printf("positive\n");
+    return 1;
+  }
+}
+
+int main(int argc, char *argv[]) {
+  int a;
+  klee_make_symbolic(&a, sizeof(a), "a");
+
+  return get_sign(a);
+}