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Merged
VincenzoArceri merged 1 commit into from
Dec 18, 2025
Merged

Add head and tail parameters to constructors and mk methods #59

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29 changes: 17 additions & 12 deletions src/main/java/it/unipr/analysis/taint/RandomnessDependencyAbstractDomain.java
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Original file line number Diff line number Diff line change
Expand Up @@ -6,26 +6,32 @@
import java.util.Set;

public class RandomnessDependencyAbstractDomain extends TaintAbstractDomain {

private static final RandomnessDependencyAbstractDomain TOP = new RandomnessDependencyAbstractDomain(
createFilledArray(TaintAbstractDomain.STACK_LIMIT, TaintElement.BOTTOM), TaintElement.CLEAN);
private static final RandomnessDependencyAbstractDomain BOTTOM = new RandomnessDependencyAbstractDomain(null,
createFilledArray(TaintAbstractDomain.STACK_LIMIT, TaintElement.BOTTOM), 0, 0, TaintElement.CLEAN);
private static final RandomnessDependencyAbstractDomain BOTTOM = new RandomnessDependencyAbstractDomain(null, 0, 0,
TaintElement.BOTTOM);

/**
* Builds an initial symbolic stack.
* Constructs a new {@code RandomnessDependencyAbstractDomain} with an empty
* (BOTTOM) stack, zero head/tail, and CLEAN memory state.
*/
public RandomnessDependencyAbstractDomain() {
this(createFilledArray(STACK_LIMIT, TaintElement.BOTTOM), TaintElement.CLEAN);
this(createFilledArray(STACK_LIMIT, TaintElement.BOTTOM), 0, 0, TaintElement.CLEAN);
}

/**
* Builds a taint abstract stack starting from a given stack and a list of
* elements that push taint.
* Constructs a new {@code RandomnessDependencyAbstractDomain} with the
* given stack state, stack pointers, and memory state.
*
* @param stack the stack of values
* @param stack the stack array containing taint information for each
* element
* @param head the current head pointer of the stack
* @param tail the current tail pointer of the stack
* @param memory the taint state of the memory
*/
protected RandomnessDependencyAbstractDomain(TaintElement[] stack, TaintElement memory) {
super(stack, memory);
protected RandomnessDependencyAbstractDomain(TaintElement[] stack, int head, int tail, TaintElement memory) {
super(stack, head, tail, memory);
}

@Override
Expand All @@ -52,8 +58,7 @@ public RandomnessDependencyAbstractDomain bottom() {
}

@Override
public TaintAbstractDomain mk(TaintElement[] stack, TaintElement memory) {
return new RandomnessDependencyAbstractDomain(stack, memory);
public TaintAbstractDomain mk(TaintElement[] stack, int head, int tail, TaintElement memory) {
return new RandomnessDependencyAbstractDomain(stack, head, tail, memory);
}

}
38 changes: 26 additions & 12 deletions src/main/java/it/unipr/analysis/taint/TaintAbstractDomain.java
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Expand Up @@ -74,18 +74,30 @@ public abstract class TaintAbstractDomain
private final TaintElement memory;

/**
* Builds a taint abstract stack starting from a given stack and a list of
* elements that push taint. Builds a taint abstract stack starting from a
* given stack and a memory element.
* Builds a taint abstract stack starting from a given stack and a taint
* memory. Builds a taint abstract stack starting from a given stack and a
* memory element.
*
* @param stack the stack of values
* @param memory the memory element
*/
protected TaintAbstractDomain(TaintElement[] stack, TaintElement memory) {
this(stack, 0, 0, memory);
}

/**
* Builds a taint abstract stack starting from a given stack, its head
* index, its tail index and a taint memory. Builds a taint abstract stack
* starting from a given stack and a memory element.
*
* @param stack the stack of values
* @param memory the memory element
*/
protected TaintAbstractDomain(TaintElement[] stack, int head, int tail, TaintElement memory) {
this.stack = stack;
this.memory = memory;
this.head = 0;
this.tail = 0;
this.head = head;
this.tail = tail;
}

@Override
Expand Down Expand Up @@ -187,7 +199,7 @@ public TaintAbstractDomain smallStepSemantics(ValueExpression expression, Progra
resultStack.popX(3);

if (this.isTainted((Statement) pp))
return mk(resultStack.stack, TaintElement.TAINT);
return mk(resultStack.stack, resultStack.head, resultStack.tail, TaintElement.TAINT);

return resultStack;
}
Expand Down Expand Up @@ -233,7 +245,7 @@ else if (memory.isClean())
TaintElement value = resultStack.pop();

if (value.isTaint())
return mk(resultStack.stack, TaintElement.TAINT);
return mk(resultStack.stack, resultStack.head, resultStack.tail, TaintElement.TAINT);
else if (value.isClean())
return resultStack;
}
Expand Down Expand Up @@ -749,7 +761,7 @@ public TaintAbstractDomain glbAux(TaintAbstractDomain other) throws SemanticExce
for (int i = 0; i < STACK_LIMIT; i++) {
result[i] = this.get(i).glb(other.get(i));
}
return mk(result, this.memory.glb(other.memory));
return mk(result, this.head, this.tail, this.memory.glb(other.memory));
}

/**
Expand All @@ -767,7 +779,7 @@ public TaintAbstractDomain lubAux(TaintAbstractDomain other) throws SemanticExce
for (int i = 0; i < STACK_LIMIT; i++) {
result[i] = this.get(i).lub(other.get(i));
}
return mk(result, this.memory.lub(other.memory));
return mk(result, this.head, this.tail, this.memory.lub(other.memory));
}

/**
Expand Down Expand Up @@ -859,7 +871,7 @@ public boolean hasBottomUntil(int x) {
@Override
public TaintAbstractDomain clone() {
TaintElement[] newArray = stack.clone();
TaintAbstractDomain copy = mk(newArray, memory);
TaintAbstractDomain copy = mk(newArray, head, tail, memory);
copy.head = this.head;
copy.tail = this.tail;
return copy;
Expand Down Expand Up @@ -955,12 +967,14 @@ else if (isTop())

/**
* Utility for creating a concrete instance of {@link TaintAbstractDomain}
* given the stack and the memory.
* given the stack, its head index, its tail index and the memory.
*
* @param stack the stack
* @param head the head index
* @param tail the tail index
* @param memory the memory
*
* @return a new concrete instance of {@link TaintAbstractDomain}
*/
public abstract TaintAbstractDomain mk(TaintElement[] stack, TaintElement memory);
public abstract TaintAbstractDomain mk(TaintElement[] stack, int head, int tail, TaintElement memory);
}
27 changes: 16 additions & 11 deletions src/main/java/it/unipr/analysis/taint/TxOriginAbstractDomain.java
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Original file line number Diff line number Diff line change
Expand Up @@ -8,24 +8,29 @@
public class TxOriginAbstractDomain extends TaintAbstractDomain {

private static final TxOriginAbstractDomain TOP = new TxOriginAbstractDomain(
createFilledArray(TaintAbstractDomain.STACK_LIMIT, TaintElement.BOTTOM), TaintElement.CLEAN);
private static final TxOriginAbstractDomain BOTTOM = new TxOriginAbstractDomain(null, TaintElement.BOTTOM);
createFilledArray(TaintAbstractDomain.STACK_LIMIT, TaintElement.BOTTOM), 0, 0, TaintElement.CLEAN);
private static final TxOriginAbstractDomain BOTTOM = new TxOriginAbstractDomain(null, 0, 0, TaintElement.BOTTOM);

/**
* Builds an initial symbolic stack.
* Constructs a new {@code TxOriginAbstractDomain} with an empty (BOTTOM)
* stack, zero head/tail, and CLEAN memory state.
*/
public TxOriginAbstractDomain() {
this(createFilledArray(STACK_LIMIT, TaintElement.BOTTOM), TaintElement.CLEAN);
this(createFilledArray(STACK_LIMIT, TaintElement.BOTTOM), 0, 0, TaintElement.CLEAN);
}

/**
* Builds a taint abstract stack starting from a given stack and a list of
* elements that push taint.
* Constructs a new {@code TxOriginAbstractDomain} with the given stack
* state, stack pointers, and memory state.
*
* @param stack the stack of values
* @param stack the stack array containing taint information for each
* element
* @param head the current head pointer of the stack
* @param tail the current tail pointer of the stack
* @param memory the taint state of the memory
*/
protected TxOriginAbstractDomain(TaintElement[] stack, TaintElement memory) {
super(stack, memory);
protected TxOriginAbstractDomain(TaintElement[] stack, int head, int tail, TaintElement memory) {
super(stack, head, tail, memory);
}

@Override
Expand All @@ -49,7 +54,7 @@ public TxOriginAbstractDomain bottom() {
}

@Override
public TaintAbstractDomain mk(TaintElement[] stack, TaintElement memory) {
return new TxOriginAbstractDomain(stack, memory);
public TaintAbstractDomain mk(TaintElement[] stack, int head, int tail, TaintElement memory) {
return new TxOriginAbstractDomain(stack, head, tail, memory);
}
}