kfdtest: Factor out multi-process test into a base class

Create KFDMultiProcessTest base class for tests forking multiple
child processes. Derive KFDEvictTest from that class.

Change-Id: Ie5f3362c45be2b807bf7a83839ab3820352a67f9
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>


[ROCm/ROCR-Runtime commit: 6704b051d2]

projects/rocr-runtime/tests/kfdtest/src/KFDMultiProcessTest.hpp

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2019 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.
+ *
+ */
+
+#ifndef __KFD_MULTI_PROCESS_TEST__H__
+#define __KFD_MULTI_PROCESS_TEST__H__
+
+#include <string>
+#include <vector>
+#include "KFDBaseComponentTest.hpp"
+
+// @class KFDMultiProcessTest
+// Base class for tests forking multiple child processes
+class KFDMultiProcessTest :  public KFDBaseComponentTest {
+ public:
+    KFDMultiProcessTest(void): m_ChildStatus(HSAKMT_STATUS_ERROR), m_IsParent(true) {}
+
+    ~KFDMultiProcessTest(void) {
+        if (!m_IsParent) {
+            /* Child process has to exit
+             * otherwise gtest will continue other tests
+             */
+            exit(m_ChildStatus);
+        }
+
+        try {
+            WaitChildProcesses();
+        } catch (...) {}
+    }
+
+ protected:
+    void ForkChildProcesses(int nprocesses);
+    void WaitChildProcesses();
+
+ protected:  // Members
+    std::string     m_psName;
+    int             m_ProcessIndex;
+    std::vector<pid_t> m_ChildPids;
+    HSAKMT_STATUS   m_ChildStatus;
+    bool            m_IsParent;
+};
+
+#endif  // __KFD_MULTI_PROCESS_TEST__H__