stioner.lib.2024.8.0.source-code.QuestionHelpers.kt Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of lib Show documentation
Show all versions of lib Show documentation
Question authoring library for CS 124.
package edu.illinois.cs.cs125.questioner.lib
import com.beyondgrader.resourceagent.jeed.IsolatedFileSystemProvider
import com.beyondgrader.resourceagent.jeed.VirtualFilesystem
import com.beyondgrader.resourceagent.jeed.populate
import edu.illinois.cs.cs125.jeed.core.CheckstyleArguments
import edu.illinois.cs.cs125.jeed.core.CheckstyleFailed
import edu.illinois.cs.cs125.jeed.core.CompilationArguments
import edu.illinois.cs.cs125.jeed.core.CompilationError
import edu.illinois.cs.cs125.jeed.core.CompilationFailed
import edu.illinois.cs.cs125.jeed.core.CompiledSource
import edu.illinois.cs.cs125.jeed.core.Features
import edu.illinois.cs.cs125.jeed.core.JeedClassLoader
import edu.illinois.cs.cs125.jeed.core.KompilationArguments
import edu.illinois.cs.cs125.jeed.core.KtLintArguments
import edu.illinois.cs.cs125.jeed.core.KtLintFailed
import edu.illinois.cs.cs125.jeed.core.Sandbox
import edu.illinois.cs.cs125.jeed.core.Source
import edu.illinois.cs.cs125.jeed.core.TemplatingFailed
import edu.illinois.cs.cs125.jeed.core.allFixedMutations
import edu.illinois.cs.cs125.jeed.core.checkstyle
import edu.illinois.cs.cs125.jeed.core.compile
import edu.illinois.cs.cs125.jeed.core.complexity
import edu.illinois.cs.cs125.jeed.core.countLines
import edu.illinois.cs.cs125.jeed.core.fromJavaSnippet
import edu.illinois.cs.cs125.jeed.core.fromKotlinSnippet
import edu.illinois.cs.cs125.jeed.core.fromTemplates
import edu.illinois.cs.cs125.jeed.core.getEmptyJavaClassSize
import edu.illinois.cs.cs125.jeed.core.getEmptyKotlinClassSize
import edu.illinois.cs.cs125.jeed.core.kompile
import edu.illinois.cs.cs125.jeed.core.ktLint
import edu.illinois.cs.cs125.jeed.core.moshi.CompiledSourceResult
import edu.illinois.cs.cs125.jeed.core.stripComments
import edu.illinois.cs.cs125.jenisol.core.CaptureOutputControlInput
import edu.illinois.cs.cs125.jenisol.core.CapturedResult
import edu.illinois.cs.cs125.jenisol.core.isPackagePrivate
import edu.illinois.cs.cs125.jenisol.core.isProtected
import edu.illinois.cs.cs125.jenisol.core.unwrap
import edu.illinois.cs.cs125.questioner.lib.compilation.filterSuppressions
import edu.illinois.cs.cs125.questioner.lib.compilation.removeExpected
import org.objectweb.asm.ClassReader
import org.objectweb.asm.ClassVisitor
import org.objectweb.asm.ClassWriter
import org.objectweb.asm.Opcodes
import org.objectweb.asm.Type
import java.io.ByteArrayInputStream
import java.io.InputStream
import java.lang.reflect.Method
import kotlin.random.Random
internal fun String.pluralize(count: Int, plural: String? = null) = if (count == 1) {
this
} else plural ?: "${this}s"
fun Question.templateSubmission(contents: String, language: Language): Source {
val template = getTemplate(language)
return if (template == null) {
Source(mapOf(filename(language) to contents))
} else {
Source.fromTemplates(
mapOf(filename(language) to contents.trimEnd()),
mapOf("${filename(language)}.hbs" to template)
)
}
}
fun Question.contentsToSource(contents: String, language: Language, testResults: TestResults): Source {
val cleanedContents = contents.lines().joinToString("\n") {
it.ifBlank { "" }
}
return templateSubmission(cleanedContents, language).also {
if (getTemplate(language) != null) {
testResults.completedSteps.add(TestResults.Step.templateSubmission)
}
}
}
fun Question.checkInitialSubmission(contents: String, language: Language, testResults: TestResults): Boolean {
val snippetProperties = try {
when (language) {
Language.java -> Source.fromJavaSnippet(contents)
Language.kotlin -> Source.fromKotlinSnippet(contents)
}.snippetProperties
} catch (e: Exception) {
testResults.completedSteps.add(TestResults.Step.checkInitialSubmission)
// If the code doesn't parse as a snippet, fall back to compiler error messages which are usually more useful
return true
}
when (published.type) {
Question.Type.SNIPPET -> {
if (snippetProperties.importCount > 0) {
testResults.failed.checkInitialSubmission = "import statements are not allowed for this problem"
} else if (snippetProperties.methodCount > 0) {
testResults.failed.checkInitialSubmission = "Method declarations are not allowed for this problem"
} else if (snippetProperties.classCount > 0) {
testResults.failed.checkInitialSubmission = "Class declarations are not allowed for this problem"
}
}
Question.Type.METHOD -> {
if (snippetProperties.importCount > 0) {
testResults.failed.checkInitialSubmission = "import statements are not allowed for this problem"
} else if (snippetProperties.classCount > 0) {
testResults.failed.checkInitialSubmission = "Class declarations are not allowed for this problem"
} else if (snippetProperties.looseCount > 0) {
testResults.failed.checkInitialSubmission =
"Submission should be a single method declaration with no code outside"
}
}
Question.Type.KLASS -> {
if (language == Language.java) {
if (snippetProperties.methodCount > 0) {
testResults.failed.checkInitialSubmission =
"Top-level method declarations are not allowed for this problem"
}
} else if (language == Language.kotlin) {
if (snippetProperties.classCount > 0 && snippetProperties.methodCount > 0) {
testResults.failed.checkInitialSubmission =
"Can't mix top-level classes and methods for this problem"
}
}
if (snippetProperties.looseCount > 0) {
testResults.failed.checkInitialSubmission = "Submission should be a single class with no code outside"
} else if (snippetProperties.classCount > 1) {
testResults.failed.checkInitialSubmission = "Submission should define a single class"
}
}
}
return if (testResults.failed.checkInitialSubmission != null) {
testResults.failedSteps.add(TestResults.Step.checkInitialSubmission)
false
} else {
testResults.completedSteps.add(TestResults.Step.checkInitialSubmission)
true
}
}
@Suppress("ThrowsCount")
suspend fun Question.compileSubmission(
source: Source,
parentClassLoader: ClassLoader,
testResults: TestResults,
suppressions: Set
): CompiledSource {
return try {
val actualParents = Pair(compiledCommon?.classLoader ?: parentClassLoader, compiledCommon?.fileManager)
val compiledSource = source.compile(
CompilationArguments(
parentClassLoader = actualParents.first,
parentFileManager = actualParents.second,
parameters = true,
)
).also { compiledSource ->
val errorMessages = compiledSource.messages.removeExpected().filterSuppressions(suppressions)
if (errorMessages.isNotEmpty()) {
throw CompilationFailed(errorMessages.map { CompilationError(it.location, it.message) })
}
testResults.complete.compileSubmission = CompiledSourceResult(compiledSource)
testResults.completedSteps.add(TestResults.Step.compileSubmission)
}
val checkstyleSuppressions = suppressions
.map {
if (it == "checkstyle") {
"checkstyle:*"
} else {
it
}
}
.filter { it.startsWith("checkstyle:") }
.map { it.removePrefix("checkstyle:") }
.toSet()
testResults.addCheckstyleResults(
source.checkstyle(
CheckstyleArguments(
failOnError = false,
suppressions = checkstyleSuppressions
)
)
)
compiledSource
} catch (e: TemplatingFailed) {
testResults.failed.templateSubmission = e
testResults.failedSteps.add(TestResults.Step.templateSubmission)
throw e
} catch (e: CheckstyleFailed) {
testResults.failed.checkstyle = e
testResults.failedSteps.add(TestResults.Step.checkstyle)
throw e
} catch (e: CompilationFailed) {
testResults.failed.compileSubmission = e
testResults.failedSteps.add(TestResults.Step.compileSubmission)
throw e
}
}
@Suppress("ThrowsCount")
suspend fun Question.kompileSubmission(
source: Source,
parentClassLoader: ClassLoader,
testResults: TestResults,
@Suppress("UNUSED_PARAMETER") suppressions: Set
): CompiledSource {
return try {
val actualParents = Pair(compiledCommon?.classLoader ?: parentClassLoader, compiledCommon?.fileManager)
val compiledSource = source.kompile(
KompilationArguments(
parentClassLoader = actualParents.first,
parentFileManager = actualParents.second,
parameters = true,
)
).also {
testResults.complete.compileSubmission = CompiledSourceResult(it)
testResults.completedSteps.add(TestResults.Step.compileSubmission)
}
testResults.addKtlintResults(
source.ktLint(
KtLintArguments(
failOnError = false,
indent = 2,
maxLineLength = 120,
)
)
)
compiledSource
} catch (e: TemplatingFailed) {
testResults.failed.templateSubmission = e
testResults.failedSteps.add(TestResults.Step.templateSubmission)
throw e
} catch (e: KtLintFailed) {
testResults.failed.ktlint = e
testResults.failedSteps.add(TestResults.Step.ktlint)
throw e
} catch (e: CompilationFailed) {
testResults.failed.compileSubmission = e
testResults.failedSteps.add(TestResults.Step.compileSubmission)
throw e
}
}
fun Question.checkCompiledSubmission(
compiledSubmission: CompiledSource,
testResults: TestResults
): String? = compiledSubmission.classLoader.definedClasses.topLevelClasses().let {
when {
it.isEmpty() -> {
testResults.failed.checkCompiledSubmission = "Submission defined no classes"
testResults.failedSteps.add(TestResults.Step.checkCompiledSubmission)
return null
}
it.size > 1 -> {
testResults.failed.checkCompiledSubmission = "Submission defined multiple classes"
testResults.failedSteps.add(TestResults.Step.checkCompiledSubmission)
return null
}
}
var klass = it.first()
if (compiledSubmission.source.type == Source.SourceType.KOTLIN &&
(solution.skipReceiver || solution.fauxStatic) &&
klass == "${compilationDefinedClass}Kt"
) {
klass = "${compilationDefinedClass}Kt"
} else {
if (klass != compilationDefinedClass) {
testResults.failed.checkCompiledSubmission =
"Submission defines incorrect class: ${it.first()} != $compilationDefinedClass"
testResults.failedSteps.add(TestResults.Step.checkCompiledSubmission)
return null
}
}
return klass
}
@Suppress("ReturnCount")
fun Question.checkExecutedSubmission(
taskResults: Sandbox.TaskResults<*>,
testResults: TestResults,
language: Language
): Boolean {
var message: String? = null
taskResults.sandboxedClassLoader!!.definedClasses.topLevelClasses().let {
when {
it.isEmpty() -> message = "Submission defined no classes"
it.size > 1 -> message = "Submission defined multiple classes"
}
val klass = it.first()
if (!(
language == Language.kotlin &&
solution.skipReceiver &&
klass == "${compilationDefinedClass}Kt"
)
) {
if (klass != compilationDefinedClass) {
message =
"Submission defines incorrect class: ${it.first()} != $compilationDefinedClass"
}
}
}
taskResults.sandboxedClassLoader!!.loadedClasses.find { imported ->
importBlacklist.any { imported.startsWith(it) }
}?.let {
message = "Cannot use $it for this problem"
}
taskResults.permissionRequests.filter { !it.granted }.let { denied ->
if (denied.isNotEmpty()) {
val deniedPermission = denied.find { it.permission.name.startsWith("loadClass") }
message = if (deniedPermission != null) {
"Cannot use ${deniedPermission.permission.name.removePrefix("loadClass ")} for this problem"
} else {
"Submission permission requests were denied: ${denied.first().permission}"
}
}
}
return if (message != null) {
testResults.failed.checkExecutedSubmission = message
testResults.failedSteps.add(TestResults.Step.checkExecutedSubmission)
false
} else {
true
}
}
suspend fun Question.mutations(seed: Int, count: Int) =
templateSubmission(
if (getTemplate(Language.java) != null) {
"// TEMPLATE_START\n" + solutionByLanguage[Language.java]!!.contents + "\n// TEMPLATE_END \n"
} else {
solutionByLanguage[Language.java]!!.contents
}, Language.java
).allFixedMutations(random = Random(seed)).mapNotNull {
try {
it.formatted()
} catch (e: Exception) {
println(
"""
Failed to format mutation sources for mutation type: ${it.mutations.firstOrNull()!!.mutation.mutationType}
Mutated:
---
${it.contents}
---
Original:
---
${it.originalSources.contents}
---
Please report a bug so that we can improve the mutation engine.
""".trimIndent()
)
null
}
}
.map {
// Mutations will sometimes break the entire template
Pair(
try {
it.contents.deTemplate(getTemplate(Language.java))
} catch (e: Exception) {
getCorrect(Language.java)!!
}, it
)
}
.filter { (contents, _) ->
// Templated questions sometimes will mutate the template
contents != getCorrect(Language.java)!!
}
.distinctBy { (contents, _) ->
contents.stripComments(Source.FileType.JAVA).hashCode()
}
.shuffled(random = Random(seed))
.take(count)
.map { (contents, source) ->
Question.IncorrectFile(
published.klass,
contents,
Question.IncorrectFile.Reason.TEST,
Language.java,
null,
false,
mutation = source
)
}
class MaxClassSizeExceeded(message: String) : RuntimeException(message)
private object EmptyClassSizes {
val EMPTY_JAVA_CLASS_SIZE by lazy {
getEmptyJavaClassSize()
}
val EMPTY_KOTLIN_CLASS_SIZE by lazy {
getEmptyKotlinClassSize()
}
}
fun Question.computeClassSize(
compiledSubmission: CompiledSource,
language: Language,
settings: Question.TestingSettings
): TestResults.ResourceUsageComparison {
val emptyClassSize = when (language) {
Language.java -> EmptyClassSizes.EMPTY_JAVA_CLASS_SIZE
Language.kotlin -> EmptyClassSizes.EMPTY_KOTLIN_CLASS_SIZE
}
val submissionClassSize = (compiledSubmission.classLoader.sizeInBytes.toLong() - emptyClassSize).let { size ->
when {
size < 0 -> {
logger.warn { "Negative relative class size value: $size" }
0
}
else -> size
}
}
val solutionClassSize = when (language) {
Language.java -> validationResults?.solutionMaxClassSize?.java ?: settings.solutionClassSize?.java
Language.kotlin -> validationResults?.solutionMaxClassSize?.kotlin
?: settings.solutionClassSize?.kotlin
} ?: submissionClassSize
val maxClassSize = solutionClassSize * Question.TestingControl.DEFAULT_MIN_FAIL_FAST_CLASS_SIZE_MULTIPLIER
if (submissionClassSize > maxClassSize) {
throw MaxClassSizeExceeded(
"Submission class size $submissionClassSize exceeds maximum of $maxClassSize.\n" +
"The solution has class size of $solutionClassSize."
)
}
return TestResults.ResourceUsageComparison(
solutionClassSize,
submissionClassSize,
(solutionClassSize.toDouble() * control.maxClassSizeMultiplier!!).toLong()
)
}
class MaxComplexityExceeded(message: String) : RuntimeException(message)
fun Question.computeComplexity(contents: String, language: Language): TestResults.ComplexityComparison {
val solutionComplexity = classification.complexity[language]
check(solutionComplexity != null) { "Solution complexity not available for $language" }
val maxComplexity =
(control.maxComplexityMultiplier!! * solutionComplexity)
.toInt()
.coerceAtLeast(Question.TestingControl.DEFAULT_MIN_FAIL_FAST_COMPLEXITY)
val submissionComplexity = when {
published.type == Question.Type.SNIPPET && contents.isBlank() -> 0
language == Language.java -> {
val source = when (published.type) {
Question.Type.KLASS -> Source(mapOf("${published.klass}.java" to contents))
Question.Type.METHOD -> Source(
mapOf(
"${published.klass}.java" to """
public class ${published.klass} {
$contents
}""".trimStart()
)
)
Question.Type.SNIPPET -> Source.fromJavaSnippet(contents, trim = false)
}
source.complexity().let { results ->
when (published.type) {
Question.Type.KLASS -> results.lookupFile("${published.klass}.java")
Question.Type.METHOD -> results.lookup(published.klass, "${published.klass}.java").complexity
Question.Type.SNIPPET -> results.lookup("").complexity
}
}
}
language == Language.kotlin -> {
val source = when (published.type) {
Question.Type.SNIPPET -> Source.fromKotlinSnippet(contents, trim = false)
else -> Source(mapOf("${published.klass}.kt" to contents))
}
source.complexity().let { results ->
when (published.type) {
Question.Type.SNIPPET -> results.lookup("").complexity
else -> results.lookupFile("${published.klass}.kt")
}
}
}
else -> error("Shouldn't get here")
}
if (submissionComplexity > maxComplexity) {
throw MaxComplexityExceeded(
"Submission complexity $submissionComplexity exceeds maximum of $maxComplexity.\n" +
"The solution has $solutionComplexity code ${"path".pluralize(solutionComplexity)}."
)
}
return TestResults.ComplexityComparison(solutionComplexity, submissionComplexity, control.maxExtraComplexity!!)
}
fun Question.checkFeatures(
submissionFeatures: Features,
language: Language
): TestResults.FeaturesComparison {
val solutionFeatures = classification.featuresByLanguage[language]
check(solutionFeatures != null) { "Solution features not available" }
val errors = if (featureChecker != null) {
@Suppress("UNCHECKED_CAST")
if (featureChecker!!.parameters.size == 2) {
unwrap { featureChecker!!.invoke(null, solutionFeatures, submissionFeatures) } as List
} else {
unwrap { featureChecker!!.invoke(null, language, solutionFeatures, submissionFeatures) } as List
}
} else {
listOf()
}
return TestResults.FeaturesComparison(errors)
}
class MaxLineCountExceeded(message: String) : RuntimeException(message)
fun Question.computeLineCounts(contents: String, language: Language): TestResults.LineCountComparison {
val solutionLineCount = classification.lineCounts[language]
check(solutionLineCount != null) { "Solution line count not available" }
val maxLineCount = (control.maxLineCountMultiplier!! * solutionLineCount.source).toInt()
val type = when (language) {
Language.java -> Source.FileType.JAVA
Language.kotlin -> Source.FileType.KOTLIN
}
val submissionLineCount = contents.countLines(type)
if (submissionLineCount.source > maxLineCount) {
throw MaxLineCountExceeded(
"Submission line count ${submissionLineCount.source} exceeds maximum of $maxLineCount.\n" +
"The solution has ${solutionLineCount.source} source ${"line".pluralize(solutionLineCount.source)}."
)
}
return TestResults.LineCountComparison(
solutionLineCount,
submissionLineCount,
(solutionLineCount.source * control.sourceLinesMultiplier!!).toInt(),
control.minExtraSourceLines!!
)
}
fun Question.checkRecursion(
klassName: String,
language: Language,
settings: Question.TestingSettings,
isSolution: Boolean,
results: TestResults,
): TestResults.RecursionComparison {
val submissionRecursiveMethods = results.tests()!!.asSequence().filter {
it.submissionResourceUsage!!.invokedRecursiveFunctions.isNotEmpty()
}.map {
it.jenisol!!.solutionExecutable
}.filterIsInstance().map {
ResourceMonitoringResults.MethodInfo(klassName, it.name, Type.getMethodDescriptor(it))
}.toSet()
val expectedRecursiveMethods = when {
isSolution -> submissionRecursiveMethods
else -> classification.recursiveMethodsByLanguage?.get(language) ?: settings.solutionRecursiveMethods?.get(
language
)
}
check(expectedRecursiveMethods != null)
if (isSolution) {
results.foundRecursiveMethods = expectedRecursiveMethods
}
val missingRecursiveMethods = (expectedRecursiveMethods - submissionRecursiveMethods).map { it.methodName }
return TestResults.RecursionComparison(missingRecursiveMethods)
}
class InvertingClassLoader(
private val inversions: Set,
parent: ClassLoader = getSystemClassLoader()
) : ClassLoader(parent) {
// Invert the usual delegation strategy for classes in this package to avoid using the system ClassLoader
override fun loadClass(name: String): Class<*> {
return if (name in inversions) {
throw ClassNotFoundException()
} else {
super.loadClass(name)
}
}
override fun loadClass(name: String, resolve: Boolean): Class<*> {
return if (name in inversions) {
throw ClassNotFoundException()
} else {
super.loadClass(name, resolve)
}
}
}
class BumpingInputStream : InputStream() {
private var stream = ByteArrayInputStream("".toByteArray())
private lateinit var inputs: List
private var index = 0
private var usedIndex = false
fun setInputs(ourInputs: List) {
index = 0
usedIndex = false
inputs = ourInputs
stream = ByteArrayInputStream(inputs.getOrNull(index) ?: "".toByteArray())
}
fun bump() {
if (usedIndex) {
index++
stream = ByteArrayInputStream(inputs.getOrNull(index) ?: "".toByteArray())
usedIndex = false
}
}
override fun read(): Int {
usedIndex = true
return stream.read()
}
}
fun bindJeedCaptureOutputControlInput(
stdinStream: BumpingInputStream,
perTestOutputLimit: Int
): CaptureOutputControlInput {
return fun(stdin: List, jeedFileSystem: Map, run: () -> Any?): CapturedResult {
stdinStream.setInputs(stdin.map { "$it\n".toByteArray() })
val outputListener = object : Sandbox.OutputListener {
override fun stdout(int: Int) {
stdinStream.bump()
}
override fun stderr(int: Int) {}
}
VirtualFilesystem.currentFilesystem = IsolatedFileSystemProvider().apply {
fileSystem.populate(jeedFileSystem)
}
var resourceUsage: ResourceMonitoringCheckpoint? = null
val jeedOutput = Sandbox.redirectOutput(outputListener, perTestOutputLimit, squashNormalOutput = true) {
ResourceMonitoring.beginSubmissionCall()
try {
run()
} finally {
resourceUsage = ResourceMonitoring.finishSubmissionCall()
}
}
return CapturedResult(
jeedOutput.returned,
jeedOutput.threw,
jeedOutput.stdout,
jeedOutput.stderr,
jeedOutput.stdin,
jeedOutput.interleavedInputOutput,
jeedOutput.truncatedLines,
resourceUsage
)
}
}
private fun fixAccess(access: Int) = (access and Opcodes.ACC_PROTECTED.inv()) or Opcodes.ACC_PUBLIC
fun JeedClassLoader.fixProtectedAndPackagePrivate(): ClassLoader {
val klasses = definedClasses.associateWith { className ->
val klass = loadClass(className)
val classesToOpen = klass.declaredClasses
.filter { innerClass -> innerClass.isPackagePrivate() || innerClass.isProtected() }
.map { innerClass -> innerClass.name }
val fieldsToOpen = klass.declaredFields
.filter { field -> !field.isSynthetic && field.isPackagePrivate() || field.isProtected() }
.map { field -> field.name }
val methodsToOpen = klass.declaredMethods
.filter { method -> !method.isSynthetic && method.isPackagePrivate() || method.isProtected() }
.map { method -> method.name }.toMutableSet()
if (klass.enclosingClass != null && (klass.isProtected() || klass.isPackagePrivate())) {
methodsToOpen += ""
}
val classReader = ClassReader(bytecodeForClasses[className])
val classWriter = ClassWriter(classReader, 0)
val openingVisitor = object : ClassVisitor(Opcodes.ASM8, classWriter) {
override fun visitInnerClass(name: String, outerName: String?, innerName: String?, access: Int) =
when {
name in classesToOpen -> super.visitInnerClass(name, outerName, innerName, fixAccess(access))
else -> super.visitInnerClass(name, outerName, innerName, access)
}
override fun visitField(
access: Int,
name: String,
descriptor: String?,
signature: String?,
value: Any?
) = when (name) {
in fieldsToOpen -> super.visitField(fixAccess(access), name, descriptor, signature, value)
else -> super.visitField(access, name, descriptor, signature, value)
}
override fun visitMethod(
access: Int,
name: String,
descriptor: String?,
signature: String?,
exceptions: Array?
) = when (name) {
in methodsToOpen -> super.visitMethod(fixAccess(access), name, descriptor, signature, exceptions)
else -> super.visitMethod(access, name, descriptor, signature, exceptions)
}
}
classReader.accept(openingVisitor, 0)
classWriter.toByteArray()
}
return CopyableClassLoader(klasses, classLoader.parent)
}