/
RetainedSizeTest.kt
358 lines (301 loc) · 9.8 KB
/
RetainedSizeTest.kt
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package shark
import org.assertj.core.api.Assertions.assertThat
import org.junit.Before
import org.junit.Rule
import org.junit.Test
import org.junit.rules.TemporaryFolder
import shark.ValueHolder.IntHolder
import shark.ValueHolder.LongHolder
import shark.ValueHolder.ReferenceHolder
import shark.ValueHolder.ShortHolder
import java.io.File
import shark.GcRoot.JavaFrame
import shark.GcRoot.ThreadObject
import shark.HeapObject.HeapInstance
class RetainedSizeTest {
@get:Rule
var testFolder = TemporaryFolder()
private lateinit var hprofFile: File
@Before
fun setUp() {
hprofFile = testFolder.newFile("temp.hprof")
}
@Test fun emptyLeakingInstance() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
assertThat(retainedSize).isEqualTo(0)
}
@Test fun leakingInstanceWithPrimitiveType() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = LongHolder(42)
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 8 bytes for long
assertThat(retainedSize).isEqualTo(8)
}
@Test fun leakingInstanceWithPrimitiveArray() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = "42".charArrayDump
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference, 2 bytes per char
assertThat(retainedSize).isEqualTo(8)
}
@Test fun leakingInstanceWithString() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = string("42")
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference, string (4 array ref + 4 int + 2 byte per char)
assertThat(retainedSize).isEqualTo(16)
}
@Test fun leakingInstanceWithInstance() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = "FortyTwo" instance {
field["number"] = IntHolder(42)
}
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference + 4 byte int
assertThat(retainedSize).isEqualTo(8)
}
@Test fun leakingInstanceWithPrimitiveWrapper() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = "java.lang.Integer" instance {
field["value"] = IntHolder(42)
}
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference, int field
assertThat(retainedSize).isEqualTo(8)
}
@Test fun leakingInstanceWithPrimitiveWrapperArray() {
hprofFile.dump {
val intWrapperClass = clazz("java.lang.Integer", fields = listOf("value" to IntHolder::class))
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = objectArrayOf(
intWrapperClass,
instance(
intWrapperClass,
fields = listOf<ValueHolder>(IntHolder(4))
),
instance(
intWrapperClass,
fields = listOf<ValueHolder>(IntHolder(2))
)
)
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference * 3, 2 ints
assertThat(retainedSize).isEqualTo(20)
}
@Test fun leakingInstanceWithObjectArray() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = objectArray("Forty" instance {}, "Two" instance {})
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference, 4 bytes per object entry
assertThat(retainedSize).isEqualTo(12)
}
@Test fun leakingInstanceWithDeepRetainedObjects() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = "Forty" instance {
field["forty"] = "Two" instance {
field["two"] = string("42")
}
}
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference * 3, string (4 array ref + 4 int + 2 byte per char)
assertThat(retainedSize).isEqualTo(24)
}
@Test fun leakingInstanceNotDominating() {
hprofFile.dump {
val fortyTwo = string("42")
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = fortyTwo
}
staticField["rootDominator"] = fortyTwo
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference
assertThat(retainedSize).isEqualTo(4)
}
@Test fun leakingInstanceWithSuperClass() {
hprofFile.dump {
val parentClass = clazz("Parent", fields = listOf("value" to LongHolder::class))
val childClass =
clazz("Child", superclassId = parentClass, fields = listOf("value" to IntHolder::class))
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["answer"] = instance(childClass, listOf(LongHolder(42), IntHolder(42)))
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference + Long + Int
assertThat(retainedSize).isEqualTo(16)
}
@Test fun leakingInstanceDominatedByOther() {
hprofFile.dump {
"GcRoot" clazz {
staticField["shortestPath"] = "GrandParentLeaking" watchedInstance {
field["answer"] = ShortHolder(42)
field["child"] = "ParentLeaking" watchedInstance {
field["answer"] = IntHolder(42)
field["child"] = "ChildLeaking" watchedInstance {
field["answer"] = LongHolder(42)
}
}
}
}
}
val retainedInstances = retainedInstances()
require(retainedInstances.size == 1)
val instance = retainedInstances[0]
assertThat(instance.leakTraces.first().leakingObject.className).isEqualTo("GrandParentLeaking")
// 4 bytes per ref * 2 + short + int + long
assertThat(instance.totalRetainedHeapByteSize).isEqualTo(22)
}
@Test fun crossDominatedIsNotDominated() {
hprofFile.dump {
val fortyTwo = string("42")
"GcRoot1" clazz {
staticField["shortestPath"] = "Leaking1" watchedInstance {
field["answer"] = fortyTwo
}
}
"GcRoot2" clazz {
staticField["shortestPath"] = "Leaking2" watchedInstance {
field["answer"] = fortyTwo
}
}
}
val retainedInstances = retainedInstances()
require(retainedInstances.size == 2)
retainedInstances.forEach { instance ->
// 4 byte reference
assertThat(instance.totalRetainedHeapByteSize).isEqualTo(4)
}
}
@Test fun nativeSizeAccountedFor() {
val width = 24
val height = 16
// pixel count * 4 bytes per pixel (ARGB_8888)
val nativeBitmapSize = width * height * 4
hprofFile.dump {
val bitmap = "android.graphics.Bitmap" instance {
field["mWidth"] = IntHolder(width)
field["mHeight"] = IntHolder(height)
}
val referenceClass =
clazz("java.lang.ref.Reference", fields = listOf("referent" to ReferenceHolder::class))
val cleanerClass = clazz(
"sun.misc.Cleaner", clazz("java.lang.ref.PhantomReference", referenceClass),
fields = listOf("thunk" to ReferenceHolder::class)
)
instance(
cleanerClass,
fields = listOf("libcore.util.NativeAllocationRegistry\$CleanerThunk" instance {
field["this\$0"] = "libcore.util.NativeAllocationRegistry" instance {
field["size"] = LongHolder(nativeBitmapSize.toLong())
}
}, bitmap)
)
"GcRoot" clazz {
staticField["shortestPath"] = "Leaking" watchedInstance {
field["bitmap"] = bitmap
}
}
}
val retainedSize = retainedInstances()
.firstRetainedSize()
// 4 byte reference + 2 * Int + native size
assertThat(retainedSize).isEqualTo(12 + nativeBitmapSize)
}
@Test fun `thread retained size includes java local references`() {
hprofFile.dump {
val threadInstance = Thread::class.java.name instance { }
gcRoot(
ThreadObject(
id = threadInstance.value,
threadSerialNumber = 42,
stackTraceSerialNumber = 0
)
)
val longArrayId = primitiveLongArray(LongArray(3))
gcRoot(JavaFrame(id = longArrayId, threadSerialNumber = 42, frameNumber = 0))
}
val analysis = hprofFile.checkForLeaks<HeapAnalysis>(
computeRetainedHeapSize = true,
leakingObjectFinder = FilteringLeakingObjectFinder(listOf(FilteringLeakingObjectFinder.LeakingObjectFilter { heapObject ->
heapObject is HeapInstance &&
heapObject.instanceClassName == Thread::class.java.name
}))
)
println(analysis.toString())
analysis as HeapAnalysisSuccess
val retainedInstances = analysis.applicationLeaks
val retainedSize = retainedInstances.firstRetainedSize()
// LongArray(3), 8 bytes per long
assertThat(retainedSize).isEqualTo(3 * 8)
}
private fun retainedInstances(): List<Leak> {
val analysis = hprofFile.checkForLeaks<HeapAnalysis>(computeRetainedHeapSize = true)
println(analysis.toString())
analysis as HeapAnalysisSuccess
return analysis.applicationLeaks
}
private fun List<Leak>.firstRetainedSize(): Int {
return map { it.totalRetainedHeapByteSize!! }
.first()
}
}