[rocprofiler-systems] Overhaul skip condition of implicit_task and add ROCPD validation test (#1589)

- Add rocpd validation check and fix implicit_task check
- SWDEV-562896

projects/rocprofiler-systems/source/lib/rocprof-sys/library/rocprofiler-sdk.cpp

@@ -1242,14 +1242,28 @@ tool_tracing_callback(rocprofiler_callback_tracing_record_t record,
     };
 
 #if(ROCPROFILER_VERSION >= 600)
-    static bool is_first_implicit_task = false;
-    if(!is_first_implicit_task && record.operation == ROCPROFILER_OMPT_ID_implicit_task)
+    // Skip implicit_task associated with an "initial-task-begin" occurrence
+    // as it is generated by our tool.
+    //  Occurs after our tool initializes OMPT but before the first OpenMP
+    //  region (user code) begins.
+    // Note: Can occur multiple times (Ex: MPI+OpenMP hybrid)
+    if(record.kind == ROCPROFILER_CALLBACK_TRACING_OMPT &&
+       record.operation == ROCPROFILER_OMPT_ID_implicit_task)
     {
-        // We do not capture implicit task with flags = 1 on main thread
-        //  For now, this is identified as the first implicit task call
-        is_first_implicit_task = true;
-        return;
+        auto* payload_data =
+            static_cast<rocprofiler_callback_tracing_ompt_data_t*>(record.payload);
+        int flag = payload_data->args.implicit_task.flags;
+        if(flag & ompt_task_initial) return;
     }
+    // TODO: Once ompt_callback_thread_begin is supported, we need to skip
+    //  every occurrence of an "initial-thread-begin" for similar reasons.
+    // This callback is identified with thread_type == ompt_thread_initial.
+
+    // Note: If the finalization issue is resolved, the corresponding ends of these
+    //  callbacks (which should be discarded) can be identified with:
+    // - implicit_task: (flag & ompt_task_initial) && endpoint == ompt_scope_end
+    // - thread_end: The thread_data ptr from the thread_begin callback generated
+    //    by the "initial-thread-begin" needs to match the thread_end's thread_data ptr
 #endif
 
     auto ts = rocprofiler_timestamp_t{};

projects/rocprofiler-systems/tests/rocpd-validation-rules/default-rules.json

@@ -68,6 +68,24 @@
                 "end",
                 "name"
             ]
+        },
+        {
+            "name": "regions",
+            "required_columns": [
+                "tid",
+                "start",
+                "end",
+                "name"
+            ],
+            "validation_queries": [
+                {
+                    "comparison": "equals",
+                    "description": "Verify entries have non-zero start times",
+                    "error_message": "Found entries with zero start times in table",
+                    "expected_result": 0,
+                    "query": "SELECT COUNT(*) as count FROM regions WHERE start = 0"
+                }
+            ]
         }
     ]
 }