Alexander Shabalin
9fd05632f0
Previously object count was tracked via allocator. It adds additional burden on every allocation. Tracking via sweeper is better because it mostly happens on the GC thread during a concurrent sweep.
62 lines
1.7 KiB
Kotlin
62 lines
1.7 KiB
Kotlin
/*
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* Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
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*/
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@file:OptIn(kotlin.ExperimentalStdlibApi::class, kotlin.native.runtime.NativeRuntimeApi::class)
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import kotlin.native.runtime.GC
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import kotlin.test.*
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@Test
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fun `nothing new collected`() {
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GC.collect()
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GC.collect()
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val stat = GC.lastGCInfo
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assertNotNull(stat)
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for (key in stat.sweepStatistics.keys) {
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assertEquals(stat.sweepStatistics[key]!!.sweptCount, 0L)
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}
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}
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object Global {
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val x = listOf(1, 2, 3)
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}
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@Test
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fun `stable refs in root set`() {
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GC.collect()
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val stat0 = GC.lastGCInfo
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assertNotNull(stat0)
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val rootSet0 = stat0.rootSet
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assertNotNull(rootSet0)
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val x = listOf(1, 2, 3)
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val stable = kotlinx.cinterop.StableRef.create(x)
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GC.collect();
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val stat1 = GC.lastGCInfo
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assertNotNull(stat1)
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val rootSet1 = stat1.rootSet
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assertNotNull(rootSet1)
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assertEquals(rootSet0.stableReferences + 1, rootSet1.stableReferences)
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stable.dispose()
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Global.x // to initialize and register global object
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GC.collect();
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val stat2 = GC.lastGCInfo
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assertNotNull(stat2)
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val rootSet2 = stat2.rootSet
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assertNotNull(rootSet2)
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assertEquals(rootSet0.stableReferences, rootSet2.stableReferences)
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assertEquals(rootSet1.globalReferences + 1, rootSet2.globalReferences)
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}
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@Test
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fun `check everything is filled at the end`() {
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GC.collect()
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val stat = GC.lastGCInfo
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assertNotNull(stat)
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// GC.collect is waiting for finalizers, so it should bet not null
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assertNotNull(stat.postGcCleanupTimeNs)
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}
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