-
Notifications
You must be signed in to change notification settings - Fork 19
/
InstructionConcolicChecker.kt
201 lines (173 loc) · 8.11 KB
/
InstructionConcolicChecker.kt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
package org.vorpal.research.kex.asm.analysis.concolic
import kotlinx.coroutines.DelicateCoroutinesApi
import kotlinx.coroutines.TimeoutCancellationException
import kotlinx.coroutines.async
import kotlinx.coroutines.awaitAll
import kotlinx.coroutines.runBlocking
import kotlinx.coroutines.withTimeoutOrNull
import kotlinx.coroutines.yield
import kotlinx.serialization.ExperimentalSerializationApi
import kotlinx.serialization.InternalSerializationApi
import org.vorpal.research.kex.ExecutionContext
import org.vorpal.research.kex.asm.analysis.concolic.bfs.BfsPathSelectorManager
import org.vorpal.research.kex.asm.analysis.concolic.cgs.ContextGuidedSelectorManager
import org.vorpal.research.kex.asm.analysis.concolic.coverage.CoverageGuidedSelectorManager
import org.vorpal.research.kex.asm.analysis.util.analyzeOrTimeout
import org.vorpal.research.kex.asm.analysis.util.checkAsync
import org.vorpal.research.kex.compile.CompilerHelper
import org.vorpal.research.kex.config.kexConfig
import org.vorpal.research.kex.descriptor.Descriptor
import org.vorpal.research.kex.parameters.Parameters
import org.vorpal.research.kex.parameters.asDescriptors
import org.vorpal.research.kex.reanimator.UnsafeGenerator
import org.vorpal.research.kex.reanimator.codegen.ExecutorTestCasePrinter
import org.vorpal.research.kex.reanimator.codegen.klassName
import org.vorpal.research.kex.trace.runner.SymbolicExternalTracingRunner
import org.vorpal.research.kex.trace.runner.generateDefaultParameters
import org.vorpal.research.kex.trace.runner.generateParameters
import org.vorpal.research.kex.trace.symbolic.SymbolicState
import org.vorpal.research.kex.trace.symbolic.persistentSymbolicState
import org.vorpal.research.kex.trace.symbolic.protocol.ExecutionCompletedResult
import org.vorpal.research.kex.trace.symbolic.protocol.ExecutionResult
import org.vorpal.research.kex.util.newFixedThreadPoolContextWithMDC
import org.vorpal.research.kfg.ClassManager
import org.vorpal.research.kfg.ir.Method
import org.vorpal.research.kthelper.assert.unreachable
import org.vorpal.research.kthelper.logging.debug
import org.vorpal.research.kthelper.logging.log
import org.vorpal.research.kthelper.logging.warn
import org.vorpal.research.kthelper.tryOrNull
import java.util.concurrent.atomic.AtomicInteger
import kotlin.time.Duration.Companion.seconds
import kotlin.time.ExperimentalTime
interface TestNameGenerator {
fun generateName(method: Method, parameters: Parameters<Descriptor>): String
}
class TestNameGeneratorImpl : TestNameGenerator {
private var testIndex = AtomicInteger(0)
override fun generateName(method: Method, parameters: Parameters<Descriptor>): String =
method.klassName + testIndex.getAndIncrement()
}
@ExperimentalSerializationApi
@InternalSerializationApi
class InstructionConcolicChecker(
val ctx: ExecutionContext,
private val pathSelector: ConcolicPathSelector,
private val testNameGenerator: TestNameGenerator,
) {
val cm: ClassManager
get() = ctx.cm
private val compilerHelper = CompilerHelper(ctx)
companion object {
private fun buildSelectorManager(
ctx: ExecutionContext,
targets: Set<Method>,
strategyName: String,
): ConcolicPathSelectorManager = when (strategyName) {
"bfs" -> BfsPathSelectorManager(ctx, targets)
"cgs" -> ContextGuidedSelectorManager(ctx, targets)
"coverage" -> CoverageGuidedSelectorManager(ctx, targets)
else -> unreachable { log.error("Unknown type of search strategy $strategyName") }
}
@ExperimentalTime
@DelicateCoroutinesApi
fun run(context: ExecutionContext, targets: Set<Method>) {
val executors = kexConfig.getIntValue("concolic", "numberOfExecutors", 8)
val timeLimit = kexConfig.getIntValue("concolic", "timeLimit", 100)
val searchStrategy = kexConfig.getStringValue("concolic", "searchStrategy", "bfs")
val actualNumberOfExecutors = maxOf(1, minOf(executors, targets.size))
val coroutineContext = newFixedThreadPoolContextWithMDC(actualNumberOfExecutors, "concolic-dispatcher")
val selectorManager = buildSelectorManager(context, targets, searchStrategy)
val testNameGenerator = TestNameGeneratorImpl()
runBlocking(coroutineContext) {
withTimeoutOrNull(timeLimit.seconds) {
targets.map {
async {
InstructionConcolicChecker(
context,
selectorManager.createPathSelectorFor(it),
testNameGenerator
).start(it)
}
}.awaitAll()
}
}
}
}
suspend fun start(method: Method) {
method.analyzeOrTimeout(ctx.accessLevel) {
processMethod(it)
}
}
private suspend fun getDefaultTrace(method: Method): ExecutionResult? = try {
val params = generateDefaultParameters(ctx.loader, method)
params?.let { collectTraceFromAny(method, it) }
} catch (e: Throwable) {
log.warn("Error while collecting random trace:", e)
null
}
private suspend fun getRandomTrace(method: Method): ExecutionResult? = try {
val params = ctx.random.generateParameters(ctx.loader, method)
params?.let { collectTraceFromAny(method, it) }
} catch (e: Throwable) {
log.warn("Error while collecting random trace:", e)
null
}
private suspend fun collectTraceFromAny(method: Method, parameters: Parameters<Any?>): ExecutionResult? =
collectTrace(method, parameters.asDescriptors)
private suspend fun collectTrace(method: Method, parameters: Parameters<Descriptor>): ExecutionResult? = tryOrNull {
val generator = UnsafeGenerator(ctx, method, testNameGenerator.generateName(method, parameters))
generator.generate(parameters)
val testFile = generator.emit()
compilerHelper.compileFile(testFile)
collectTrace(generator.testKlassName)
}
private suspend fun collectTrace(klassName: String): ExecutionResult {
val runner = SymbolicExternalTracingRunner(ctx)
return runner.run(klassName, ExecutorTestCasePrinter.SETUP_METHOD, ExecutorTestCasePrinter.TEST_METHOD)
}
private suspend fun check(method: Method, state: SymbolicState): ExecutionResult? = try {
method.checkAsync(ctx, state, enableInlining = true)?.let { collectTrace(method, it) }
} catch (e: Throwable) {
if (e !is TimeoutCancellationException) {
log.error("Exception during asyncCheck:", e)
}
null
}
private suspend fun initializeExecutionGraph(
method: Method,
pathIterator: ConcolicPathSelector
) {
val initialExecution = when (val randomTrace = getRandomTrace(method)) {
is ExecutionCompletedResult -> randomTrace
else -> getDefaultTrace(method)
}
when (initialExecution) {
is ExecutionCompletedResult -> {
pathIterator.addExecutionTrace(method, persistentSymbolicState(), initialExecution)
}
else -> {
log.warn("Failed to generate random trace for method $method: $initialExecution")
}
}
}
private suspend fun processMethod(startingMethod: Method) {
initializeExecutionGraph(startingMethod, pathSelector)
yield()
while (pathSelector.hasNext()) {
val (method, state) = pathSelector.next()
log.debug { "Checking state: $state" }
log.debug { "Path:\n${state.path.asState()}" }
yield()
val newState = check(method, state) ?: continue
when (newState) {
is ExecutionCompletedResult -> when {
newState.trace.isEmpty() -> log.warn { "Collected empty state from $state" }
else -> pathSelector.addExecutionTrace(method, state, newState)
}
else -> log.warn("Failure during execution: $newState")
}
yield()
}
}
}