DatabaseCampaign: abstract campain for interaction with MySQL Database

The DatabaseCampaign interacts with the MySQL tables that are created
by the import-trace and prune-trace tools. It does offer all
unfinished experiment pilots from the database to the
fail-clients. Those clients send back a (by the experiment) defined
protobuf message as a result. The custom protobuf message does have to
need the form:

   import "DatabaseCampaignMessage.proto";

   message ExperimentMsg {
       required DatabaseCampaignMessage fsppilot = 1;

       repeated group Result = 2 {
          // custom fields
          required int32 bitoffset = 1;
          optional int32 result = 2;
       }
   }

The DatabaseCampaignMessage is the pilot identifier from the
database. For each of the repeated result entries a row in a table is
allocated. The structure of this table is constructed (by protobuf
reflection) from the description of the message. Each field in the
Result group becomes a column in the result table. For the given
example it would be:

    CREATE TABLE result_ExperimentMessage(
           pilot_id INT,
           bitoffset INT NOT NULL,
           result INT,
           PRIMARY_KEY(pilot_id)
    )

Change-Id: I28fb5488e739d4098b823b42426c5760331027f8

src/core/comm/CMakeLists.txt

@@ -5,8 +5,10 @@ set(SRCS
 )
 
 ## Setup desired protobuf descriptions HERE ##
-set(MY_PROTOS
+set(PROTOS
 	FailControlMessage.proto
+	DatabaseCampaignMessage.proto
+	TracePlugin.proto
 )
 
 #### PROTOBUFS ####
@@ -14,7 +16,7 @@ find_package(Protobuf REQUIRED)
 include_directories(${PROTOBUF_INCLUDE_DIRS})
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
-PROTOBUF_GENERATE_CPP(PROTO_SRCS PROTO_HDRS ${MY_PROTOS})
+PROTOBUF_GENERATE_CPP(PROTO_SRCS PROTO_HDRS ${PROTOS})
 
 add_library(fail-comm ${SRCS} ${PROTO_SRCS} ${PROTO_HDRS})
 target_link_libraries(fail-comm ${PROTOBUF_LIBRARY})

src/core/comm/DatabaseCampaignMessage.proto

@@ -0,0 +1,13 @@
+import "google/protobuf/descriptor.proto";
+extend google.protobuf.FieldOptions {
+    optional bool sql_primary_key = 32382 [ default = false];
+    optional bool sql_ignore      = 32383 [ default = false];
+}
+
+message DatabaseCampaignMessage {
+    required int32 pilot_id      = 1 [(sql_primary_key) = true];
+    required int32 variant_id    = 2 [(sql_ignore) = true];
+    required int32 fspmethod_id  = 3 [(sql_ignore) = true];
+    required int32 instr2        = 4 [(sql_ignore) = true];
+    required int32 data_address  = 5 [(sql_ignore) = true];
+}

src/core/comm/ExperimentData.hpp

@@ -24,6 +24,7 @@ public:
 	ExperimentData(google::protobuf::Message* m) : msg(m) , m_workloadID(0) { }
 
 	google::protobuf::Message& getMessage()  { return *msg; }
+	void setMessage(google::protobuf::Message *msg)  { this->msg = msg; }
 	uint32_t getWorkloadID() const { return m_workloadID; };
 	void setWorkloadID(uint32_t id) { m_workloadID = id; }
 	/**

src/core/comm/TracePlugin.proto

@@ -0,0 +1,30 @@
+message Trace_Event_Extended {
+	// data value read/written
+	optional uint64 data = 5;
+	// register contents
+	repeated group Registers = 6 {
+		// register ID
+		required uint32 id = 1;
+		// register value
+		optional uint64 value = 2;
+		// data register points to
+		optional uint32 value_deref = 3;
+	}
+	// selected stack content
+	repeated group Stack = 7 {
+		required uint32 value = 1;
+	}
+}
+
+message Trace_Event {
+	required uint64 ip = 1;
+	optional uint64 memaddr = 2;
+	optional uint32 width = 3;
+	enum AccessType {
+		READ = 1;
+		WRITE = 2;
+	}
+	optional AccessType accesstype = 4;
+
+	optional Trace_Event_Extended trace_ext = 5;
+}