Add direct test case for threadfence_system workaround

Change-Id: I5b21b590e957c901044741ac94e816cd8b1426f9

tests/src/runtimeApi/memory/hipMemoryAllocateCoherentDriver.cpp

@@ -0,0 +1,60 @@
+/* Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO
+EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
+THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+/* HIT_START
+ * BUILD: %t %s ../../test_common.cpp NVCC_OPTIONS -std=c++11
+ * RUN: %t
+ * HIT_END
+ */
+
+#include <iostream>
+#include <sstream>
+#include <vector>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string>
+#include "hip/hip_runtime.h"
+using namespace std;
+
+string getRes(){
+    FILE *in;
+    char buff[512], buff_2[512];
+    string str = "./hipMemoryAllocateCoherent";
+    if(!(in = popen(str.c_str(), "r"))){
+        exit(1);
+    }
+    fgets(buff, sizeof(buff), in);
+    fgets(buff_2, sizeof(buff_2), in);
+    string str_buff = buff;
+    str_buff += buff_2;
+    pclose(in);
+    return str_buff;
+}
+
+int main() {
+    setenv("HIP_COHERENT_HOST_ALLOC","1000,0,1",1);
+    string output = getRes();
+    istringstream buffer(output);
+    double res1, res2;
+    buffer >> res1;
+    buffer >> res2;
+    if((res2-res1*2)>0.000001)
+        exit(1);
+    std::cout << "PASSED" << std::endl;
+    return 0;
+}