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VelodromeEvent.java
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VelodromeEvent.java
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package engine.atomicity.conflictserializability.velodome;
import java.util.HashSet;
import engine.atomicity.AtomicityEvent;
import event.Lock;
import event.Thread;
import event.Variable;
import util.Pair;
import util.Transaction;
public class VelodromeEvent extends AtomicityEvent<VelodromeState> {
@Override
public void printRaceInfoLockType(VelodromeState state) {
if(this.getType().isLockType()){
if(state.verbosity == 2){
String str = "#";
str += Integer.toString(getLocId());
str += "|";
str += this.getType().toString();
str += "|";
str += this.getLock().toString();
str += "|";
str += this.getThread().getName();
System.out.println(str);
}
}
}
@Override
public void printRaceInfoTransactionType(VelodromeState state) {
if(this.getType().isLockType()){
if(state.verbosity == 2){
String str = "#";
str += Integer.toString(getLocId());
str += "|";
str += this.getType().toString();
str += "|";
str += this.getLock().toString();
str += "|";
str += this.getThread().getName();
System.out.println(str);
}
}
}
@Override
public void printRaceInfoAccessType(VelodromeState state) {
if(this.getType().isAccessType()){
if(state.verbosity == 1 || state.verbosity == 2){
String str = "#";
str += Integer.toString(getLocId());
str += "|";
str += this.getType().toString();
str += "|";
str += this.getVariable().getName();
str += "|";
str += this.getThread().getName();
str += "|";
str += this.getAuxId();
System.out.println(str);
}
}
}
@Override
public void printRaceInfoExtremeType(VelodromeState state) {
if(this.getType().isExtremeType()){
if(state.verbosity == 2){
String str = "#";
str += Integer.toString(getLocId());
str += "|";
str += this.getType().toString();
str += "|";
str += this.getTarget().toString();
str += "|";
str += this.getThread().getName();
System.out.println(str);
}
}
}
@Override
public boolean HandleSubAcquire(VelodromeState state) {
boolean violationDetected = false;
Thread t = this.getThread();
Lock l = this.getLock();
state.checkAndAddLock(l);
boolean outside = VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t));
if(outside) {
HashSet<Transaction> txn_set = new HashSet<Transaction> ();
txn_set.add(state.threadToLastOpTransaction.get(t));
txn_set.add(state.lockToLastReleaseTransaction.get(l));
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
txn_set.add(state.parentTransaction.get(t));
}
state.startedThreads.add(t);
}
Pair<Transaction, Boolean> n_cycle = state.mergeAndCheckCycle(t, txn_set);
state.threadToLastOpTransaction.put(t, n_cycle.first);
violationDetected = n_cycle.second;
}
else {
Transaction n = state.threadToCurrentTransaction.get(t);
Transaction u_l = state.lockToLastReleaseTransaction.get(l);
violationDetected = state.specialUnionAndCheckCycle(u_l, n);
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
Transaction parent_tr = state.parentTransaction.get(t);
violationDetected = violationDetected || state.specialUnionAndCheckCycle(parent_tr, n);
}
state.startedThreads.add(t);
}
}
return violationDetected;
}
@Override
public boolean HandleSubRelease(VelodromeState state) {
Thread t = this.getThread();
Lock l = this.getLock();
state.checkAndAddLock(l);
boolean outside = VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t));
if(outside){
state.lockToLastReleaseTransaction.put(l, state.threadToLastOpTransaction.get(t));
// You cannot release without acquiring, so skipping the check for a parent
}
else {
Transaction n = state.threadToCurrentTransaction.get(t);
state.lockToLastReleaseTransaction.put(l, n);
}
return false;
}
@Override
public boolean HandleSubRead(VelodromeState state) {
boolean violationDetected = false;
Thread t = this.getThread();
Variable v = this.getVariable();
state.checkAndAddVariable(v);
boolean outside = VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t));
if(outside){
HashSet<Transaction> txn_set = new HashSet<Transaction> ();
txn_set.add(state.threadToLastOpTransaction.get(t));
txn_set.add(state.writeVariableToTransaction.get(v));
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
txn_set.add(state.parentTransaction.get(t));
}
state.startedThreads.add(t);
}
Pair<Transaction, Boolean> n_cycle = state.mergeAndCheckCycle(t, txn_set);
state.threadToLastOpTransaction.put(t, n_cycle.first);
state.readVariableThreadToTransaction.get(v).put(t, n_cycle.first);
violationDetected = n_cycle.second;
}
else {
Transaction n = state.threadToCurrentTransaction.get(t);
state.readVariableThreadToTransaction.get(v).put(t, n);
Transaction w_v = state.writeVariableToTransaction.get(v);
violationDetected = state.specialUnionAndCheckCycle(w_v, n);
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
Transaction parent_tr = state.parentTransaction.get(t);
violationDetected = violationDetected || state.specialUnionAndCheckCycle(parent_tr, n);
}
state.startedThreads.add(t);
}
}
return violationDetected;
}
@Override
public boolean HandleSubWrite(VelodromeState state) {
boolean violationDetected = false;
Thread t = this.getThread();
Variable v = this.getVariable();
state.checkAndAddVariable(v);
boolean outside = VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t));
if(outside){
HashSet<Transaction> txn_set = new HashSet<Transaction> ();
txn_set.add(state.threadToLastOpTransaction.get(t));
txn_set.add(state.writeVariableToTransaction.get(v));
for(Thread tprime: state.threadToIndex.keySet()) {
txn_set.add(state.readVariableThreadToTransaction.get(v).get(tprime));
}
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
txn_set.add(state.parentTransaction.get(t));
}
state.startedThreads.add(t);
}
Pair<Transaction, Boolean> n_cycle = state.mergeAndCheckCycle(t, txn_set);
state.threadToLastOpTransaction.put(t, n_cycle.first);
state.writeVariableToTransaction.put(v, n_cycle.first);
violationDetected = n_cycle.second;
}
else {
Transaction n = state.threadToCurrentTransaction.get(t);
for(Thread tprime : state.threadToIndex.keySet()){
Transaction r_v_tprime = state.readVariableThreadToTransaction.get(v).get(tprime);
violationDetected = violationDetected || state.specialUnionAndCheckCycle(r_v_tprime, n);
}
Transaction w_v = state.writeVariableToTransaction.get(v);
violationDetected = violationDetected || state.specialUnionAndCheckCycle(w_v, n);
state.writeVariableToTransaction.put(v, n);
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
Transaction parent_tr = state.parentTransaction.get(t);
violationDetected = violationDetected || state.specialUnionAndCheckCycle(parent_tr, n);
}
state.startedThreads.add(t);
}
}
return violationDetected;
}
@Override
public boolean HandleSubFork(VelodromeState state) {
Thread t = this.getThread();
Thread child = this.getTarget();
Transaction n = null;
if(!VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t)))
n = state.threadToCurrentTransaction.get(t);
else if (!VelodromeState.isBottomTransaction(state.threadToLastOpTransaction.get(t))) n = state.threadToLastOpTransaction.get(t);
if(n != null) state.parentTransaction.put(child, n);
return false;
}
@Override
public boolean HandleSubJoin(VelodromeState state) {
boolean violationDetected = false;
Thread t = this.getThread();
Thread child_t = this.getTarget();
Transaction child_tr = state.threadToLastOpTransaction.get(child_t);
boolean outside = VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t));
if(outside){
HashSet<Transaction> txn_set = new HashSet<Transaction> ();
txn_set.add(state.threadToLastOpTransaction.get(t));
txn_set.add(child_tr);
Pair<Transaction, Boolean> n_cycle = state.mergeAndCheckCycle(t, txn_set);
state.threadToLastOpTransaction.put(t, n_cycle.first);
violationDetected = n_cycle.second;
}
else {
Transaction n = state.threadToCurrentTransaction.get(t);
violationDetected = state.specialUnionAndCheckCycle(child_tr, n);
}
return violationDetected;
}
@Override
public boolean HandleSubBegin(VelodromeState state) {
Thread t = this.getThread();
int cur_depth = state.threadToNestingDepth.get(t);
state.threadToNestingDepth.put(t, cur_depth + 1);
boolean violationDetected = false;
if(VelodromeState.isBottomTransaction(state.threadToCurrentTransaction.get(t))){
// This is the case when cur_depth = 0;
Transaction n = state.getFreshTransaction(t);
Transaction last_t = state.threadToLastOpTransaction.get(t);
violationDetected = state.specialUnionAndCheckCycle(last_t, n);
state.threadToCurrentTransaction.put(t, n);
// If this is the first event of the thread and there is a thread that forked this thread, add the previous transaction.
if(!state.startedThreads.contains(t)) {
if(state.parentTransaction.containsKey(t)) {
Transaction parent_tr = state.parentTransaction.get(t);
violationDetected = violationDetected || state.specialUnionAndCheckCycle(parent_tr, n);
}
state.startedThreads.add(t);
}
}
else{
// Treat this as a no-op
}
return violationDetected;
}
@Override
public boolean HandleSubEnd(VelodromeState state) {
Thread t = this.getThread();
int cur_depth = state.threadToNestingDepth.get(t);
state.threadToNestingDepth.put(t, cur_depth - 1);
if(cur_depth == 1) {
Transaction n = state.threadToCurrentTransaction.get(t);
state.threadToCurrentTransaction.put(t, state.getBottomTransaction());
state.threadToLastOpTransaction.put(t, n);
state.garbageCollect(n);
}
else {
// Treat this as no-op
}
return false;
}
}