Initial set of changes for ThreadTrace

Change-Id: I07ce31f9b4f508cef0fc9ca6dadcf26b6c90361e

runtime/hsa-runtime/core/util/flag.h

@@ -69,6 +69,12 @@ class Flag {
     var = os::GetEnvVar("HSA_ENABLE_INTERRUPT");
     enable_interrupt_ = (var == "0") ? false : true;
 
+    var = os::GetEnvVar("HSA_ENABLE_THREAD_TRACE");
+    enable_thread_trace_ = (var == "1") ? true : false;
+
+    var = os::GetEnvVar("HSA_THREAD_TRACE_MEM_SIZE");
+    thread_trace_buff_size_ = atoi(var.c_str());
+
     var = os::GetEnvVar("HSA_ENABLE_SDMA");
     enable_sdma_ = (var == "0") ? false : true;
 
@@ -98,6 +104,9 @@ class Flag {
 
   bool enable_interrupt() const { return enable_interrupt_; }
 
+  bool enable_thread_trace() const { return enable_thread_trace_; }
+  bool thread_trace_buff_size() const { return thread_trace_buff_size_; }
+
   bool enable_sdma() const { return enable_sdma_; }
 
   bool emulate_aql() const { return emulate_aql_; }
@@ -122,6 +131,9 @@ class Flag {
   bool sdma_wait_idle_;
   bool enable_queue_fault_message_;
 
+  bool enable_thread_trace_;
+  size_t thread_trace_buff_size_;
+
   uint32_t max_queues_;
 
   size_t scratch_mem_size_;