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RunningThreadStackMergeTest.kt
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/*
* Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.debug
import kotlinx.coroutines.*
import org.junit.Test
import java.util.concurrent.*
import kotlin.test.*
class RunningThreadStackMergeTest : DebugTestBase() {
private val testMainBlocker = CountDownLatch(1) // Test body blocks on it
private val coroutineBlocker = CyclicBarrier(2) // Launched coroutine blocks on it
@Test
fun testStackMergeWithContext() = runTest {
launchCoroutine()
awaitCoroutineStarted()
verifyDump(
"Coroutine \"coroutine#1\":BlockingCoroutine{Active}@62230679", // <- this one is ignored
"Coroutine \"coroutine#2\":StandaloneCoroutine{Active}@50284dc4, state: RUNNING\n" +
"\tat jdk.internal.misc.Unsafe.park(Native Method)\n" +
"\tat java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)\n" +
"\tat java.util.concurrent.locks.AbstractQueuedSynchronizer\$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)\n" +
"\tat java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)\n" +
"\tat java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.nonSuspendingFun(RunningThreadStackMergeTest.kt:86)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.access\$nonSuspendingFun(RunningThreadStackMergeTest.kt:12)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest\$suspendingFunction\$2.invokeSuspend(RunningThreadStackMergeTest.kt:77)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.suspendingFunction(RunningThreadStackMergeTest.kt:75)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest\$launchCoroutine\$1.invokeSuspend(RunningThreadStackMergeTest.kt:68)\n" +
"\t(Coroutine creation stacktrace)\n" +
"\tat kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:116)",
ignoredCoroutine = ":BlockingCoroutine"
) {
coroutineBlocker.await()
}
}
private fun awaitCoroutineStarted() {
testMainBlocker.await()
while (coroutineBlocker.numberWaiting != 1) {
Thread.sleep(10)
}
}
private fun CoroutineScope.launchCoroutine() {
launch(Dispatchers.Default) {
suspendingFunction()
assertTrue(true)
}
}
private suspend fun suspendingFunction() {
// Typical use-case
withContext(Dispatchers.IO) {
yield()
nonSuspendingFun()
}
assertTrue(true)
}
private fun nonSuspendingFun() {
testMainBlocker.countDown()
coroutineBlocker.await()
}
@Test
fun testStackMergeEscapeSuspendMethod() = runTest {
launchEscapingCoroutine()
awaitCoroutineStarted()
Thread.sleep(10)
verifyDump(
"Coroutine \"coroutine#1\":BlockingCoroutine{Active}@62230679", // <- this one is ignored
"Coroutine \"coroutine#2\":StandaloneCoroutine{Active}@3aea3c67, state: RUNNING\n" +
"\tat jdk.internal.misc.Unsafe.park(Native Method)\n" +
"\tat java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)\n" +
"\tat java.util.concurrent.locks.AbstractQueuedSynchronizer\$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)\n" +
"\tat java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)\n" +
"\tat java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.nonSuspendingFun(RunningThreadStackMergeTest.kt:83)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.access\$nonSuspendingFun(RunningThreadStackMergeTest.kt:12)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest\$suspendingFunctionWithContext\$2.invokeSuspend(RunningThreadStackMergeTest.kt:124)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.suspendingFunctionWithContext(RunningThreadStackMergeTest.kt:122)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest\$launchEscapingCoroutine\$1.invokeSuspend(RunningThreadStackMergeTest.kt:116)\n" +
"\t(Coroutine creation stacktrace)\n" +
"\tat kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:116)",
ignoredCoroutine = ":BlockingCoroutine"
) {
coroutineBlocker.await()
}
}
private fun CoroutineScope.launchEscapingCoroutine() {
launch(Dispatchers.Default) {
suspendingFunctionWithContext()
assertTrue(true)
}
}
private suspend fun suspendingFunctionWithContext() {
withContext(Dispatchers.IO) {
actualSuspensionPoint()
nonSuspendingFun()
}
assertTrue(true)
}
@Test
fun testMergeThroughInvokeSuspend() = runTest {
launchEscapingCoroutineWithoutContext()
awaitCoroutineStarted()
verifyDump(
"Coroutine \"coroutine#1\":BlockingCoroutine{Active}@62230679", // <- this one is ignored
"Coroutine \"coroutine#2\":StandaloneCoroutine{Active}@3aea3c67, state: RUNNING\n" +
"\tat jdk.internal.misc.Unsafe.park(Native Method)\n" +
"\tat java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)\n" +
"\tat java.util.concurrent.locks.AbstractQueuedSynchronizer\$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)\n" +
"\tat java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)\n" +
"\tat java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.nonSuspendingFun(RunningThreadStackMergeTest.kt:83)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest.suspendingFunctionWithoutContext(RunningThreadStackMergeTest.kt:160)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest\$launchEscapingCoroutineWithoutContext\$1.invokeSuspend(RunningThreadStackMergeTest.kt:153)\n" +
"\t(Coroutine creation stacktrace)\n" +
"\tat kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:116)",
ignoredCoroutine = ":BlockingCoroutine"
) {
coroutineBlocker.await()
}
}
private fun CoroutineScope.launchEscapingCoroutineWithoutContext() {
launch(Dispatchers.Default) {
suspendingFunctionWithoutContext()
assertTrue(true)
}
}
private suspend fun suspendingFunctionWithoutContext() {
actualSuspensionPoint()
nonSuspendingFun()
assertTrue(true)
}
@Test
fun testRunBlocking() = runBlocking {
verifyDump("Coroutine \"coroutine#1\":BlockingCoroutine{Active}@4bcd176c, state: RUNNING\n" +
"\tat java.lang.Thread.getStackTrace(Thread.java:1552)\n" +
"\tat kotlinx.coroutines.debug.internal.DebugProbesImpl.enhanceStackTraceWithThreadDump(DebugProbesImpl.kt:147)\n" +
"\tat kotlinx.coroutines.debug.internal.DebugProbesImpl.dumpCoroutinesSynchronized(DebugProbesImpl.kt:122)\n" +
"\tat kotlinx.coroutines.debug.internal.DebugProbesImpl.dumpCoroutines(DebugProbesImpl.kt:109)\n" +
"\tat kotlinx.coroutines.debug.DebugProbes.dumpCoroutines(DebugProbes.kt:122)\n" +
"\tat kotlinx.coroutines.debug.StracktraceUtilsKt.verifyDump(StracktraceUtils.kt)\n" +
"\tat kotlinx.coroutines.debug.StracktraceUtilsKt.verifyDump\$default(StracktraceUtils.kt)\n" +
"\tat kotlinx.coroutines.debug.RunningThreadStackMergeTest\$testRunBlocking\$1.invokeSuspend(RunningThreadStackMergeTest.kt:112)\n" +
"\t(Coroutine creation stacktrace)\n" +
"\tat kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:116)\n")
}
private suspend fun actualSuspensionPoint() {
nestedSuspensionPoint()
assertTrue(true)
}
private suspend fun nestedSuspensionPoint() {
yield()
assertTrue(true)
}
@Test
fun testActiveThread() = runBlocking<Unit> {
launchCoroutine()
awaitCoroutineStarted()
val info = DebugProbes.dumpCoroutinesInfo().find { it.state == State.RUNNING }
assertNotNull(info)
@Suppress("INVISIBLE_MEMBER") // IDEA bug
assertNotNull(info.lastObservedThread)
coroutineBlocker.await()
}
}