Separate agent cache from queue controller (#145)

* Update lib/rocprofiler/agent.{hpp,cpp}

- get_agents() function for internal access to agent pointers

* Update AgentCache

- make member variables and member functions distinguish b/t hsa agent and rocprofiler agent clear

* Change ctor of AgentCache

* Update lib/rocprofiler/hsa/queue_controller.cpp

- QueueController::init uses agent::get_agent_cache

* Update lib/rocprofiler/hsa/agent_cache.*

- member function to get index
- operator== for rocprofiler_agent_t and hsa_agent_t
- removed hsa_iterate_agents from ctor (now in agent.cpp)

* Update lib/rocprofiler/agent.*

- construct_agent_cache function
- functions for rocprofiler agent <-> HSA agent
- functions for getting agent cache

* Update lib/rocprofiler/registration.cpp

- invoke construct_agent_cache when HSA table is receieved

* Update lib/rocprofiler/agent.cpp

- loosen failure conditions
- handle spurious duplicate entry warning

* Update lib/rocprofiler/agent.cpp

- improve read_map diagnostics

* Update lib/rocprofiler/agent.cpp

- avoid infinite loop in read_map

* Update lib/rocprofiler/agent.cpp

- handle empty kfd node properties file

* Update lib/rocprofiler/agent.cpp

- check for permissions to read a node properties file

* Update lib/rocprofiler/agent.cpp

- more checks on file readability

* Update lib/rocprofiler/tests/agent.cpp

- print virtual kfd topology

* Update lib/rocprofiler/tests/agent.cpp

- verify id.handle == hsa_agent internal node id

* Update lib/rocprofiler/tests/agent.cpp

- check node_id
- check location id
- check device id
- update abi test

* Update include/rocprofiler/agent.h

- add node_id field
- add reserved0 field to ensure new field increases struct size

* Update lib/rocprofiler/agent.cpp

- node_id instead of id.handle

* Update lib/rocprofiler/agent_cache.cpp

- node_id instead of id.handle

* Update samples/pc_sampling

- node_id for agent instead of id.handle

* Update lib/rocprofiler/buffer.cpp

- remove debug prints

samples/pc_sampling/single-user-multiple-agents.cpp

@@ -38,20 +38,20 @@ find_all_gpu_agents_supporting_pc_sampling_impl(const rocprofiler_agent_t** agen
 
             _out_agents->push_back(*agents[i]);
 
-            printf("[%s] %s :: id=%zu, type=%i, num pc sample configs=%zu\n",
+            printf("[%s] %s :: id=%u, type=%i, num pc sample configs=%zu\n",
                    __FUNCTION__,
                    agents[i]->name,
-                   agents[i]->id.handle,
+                   agents[i]->node_id,
                    agents[i]->type,
                    agents[i]->num_pc_sampling_configs);
             return ROCPROFILER_STATUS_SUCCESS;
         }
         else
         {
-            printf("[%s] %s :: id=%zu, type=%i, num pc sample configs=%zu\n",
+            printf("[%s] %s :: id=%u, type=%i, num pc sample configs=%zu\n",
                    __FUNCTION__,
                    agents[i]->name,
-                   agents[i]->id.handle,
+                   agents[i]->node_id,
                    agents[i]->type,
                    agents[i]->num_pc_sampling_configs);
         }