Initial set of changes for ThreadTrace

Change-Id: I07ce31f9b4f508cef0fc9ca6dadcf26b6c90361e

runtime/hsa-runtime/core/inc/amd_hsa_loader.hpp

@@ -399,6 +399,10 @@ public:
     hsa_ven_amd_loader_segment_descriptor_t *segment_descriptors,
     size_t *num_segment_descriptors) = 0;
 
+  /// @brief Finds the handle of @p executable to which the device
+  /// address belongs. Return NULL handle if device address is invalid
+  virtual hsa_executable_t FindExecutable(uint64_t device_address) = 0;
+
   /// @brief Returns host address given @p device_address. If @p device_address
   /// is already host address, returns null pointer. If @p device_address is
   /// invalid address, returns null pointer.