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Fuzzer fails to find combinations with constants from switch-case #291 #294

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Merged
merged 1 commit into from
Jul 4, 2022
Merged

Fuzzer fails to find combinations with constants from switch-case #291 #294

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28 changes: 26 additions & 2 deletions utbot-framework/src/main/kotlin/org/utbot/fuzzer/FuzzerFunctions.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -17,14 +17,17 @@ import soot.CharType
import soot.DoubleType
import soot.FloatType
import soot.IntType
import soot.Local
import soot.LongType
import soot.ShortType
import soot.Unit
import soot.Value
import soot.ValueBox
import soot.jimple.Constant
import soot.jimple.IntConstant
import soot.jimple.InvokeExpr
import soot.jimple.NullConstant
import soot.jimple.internal.AbstractSwitchStmt
import soot.jimple.internal.ImmediateBox
import soot.jimple.internal.JAssignStmt
import soot.jimple.internal.JCastExpr
Expand All @@ -33,8 +36,10 @@ import soot.jimple.internal.JGeExpr
import soot.jimple.internal.JGtExpr
import soot.jimple.internal.JIfStmt
import soot.jimple.internal.JLeExpr
import soot.jimple.internal.JLookupSwitchStmt
import soot.jimple.internal.JLtExpr
import soot.jimple.internal.JNeExpr
import soot.jimple.internal.JTableSwitchStmt
import soot.jimple.internal.JVirtualInvokeExpr
import soot.toolkits.graph.ExceptionalUnitGraph

Expand All @@ -45,17 +50,18 @@ private val logger = KotlinLogging.logger {}
*/
fun collectConstantsForFuzzer(graph: ExceptionalUnitGraph): Set<FuzzedConcreteValue> {
return graph.body.units.reversed().asSequence()
.filter { it is JIfStmt || it is JAssignStmt }
.filter { it is JIfStmt || it is JAssignStmt || it is AbstractSwitchStmt}
.flatMap { unit ->
unit.useBoxes.map { unit to it.value }
}
.filter { (_, value) ->
value is Constant || value is JCastExpr || value is InvokeExpr
value is Constant || value is Local || value is JCastExpr || value is InvokeExpr
}
.flatMap { (unit, value) ->
sequenceOf(
ConstantsFromIfStatement,
ConstantsFromCast,
ConstantsFromSwitchCase,
BoundValuesForDoubleChecks,
StringConstant,
).flatMap { finder ->
Expand Down Expand Up @@ -158,6 +164,24 @@ private object ConstantsFromCast: ConstantsFinder {

}

private object ConstantsFromSwitchCase: ConstantsFinder {
override fun find(graph: ExceptionalUnitGraph, unit: Unit, value: Value): List<FuzzedConcreteValue> {
if (unit !is JTableSwitchStmt && unit !is JLookupSwitchStmt) return emptyList()
val result = mutableListOf<FuzzedConcreteValue>()
if (unit is JTableSwitchStmt) {
for (i in unit.lowIndex..unit.highIndex) {
result.add(FuzzedConcreteValue(intClassId, i, FuzzedOp.EQ))
}
}
if (unit is JLookupSwitchStmt) {
unit.lookupValues.asSequence().filterIsInstance<IntConstant>().forEach {
result.add(FuzzedConcreteValue(intClassId, it.value, FuzzedOp.EQ))
}
}
return result
}
}

private object BoundValuesForDoubleChecks: ConstantsFinder {
override fun find(graph: ExceptionalUnitGraph, unit: Unit, value: Value): List<FuzzedConcreteValue> {
if (value !is InvokeExpr) return emptyList()
Expand Down