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Restore fix #1599
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@vmishenev
vmishenev committed Aug 31, 2023
1 parent 97bccc0 commit 67a4441
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107 changes: 56 additions & 51 deletions ...ains/dokka/analysis/kotlin/descriptors/compiler/configuration/JvmDependenciesIndexImpl.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -14,23 +14,35 @@
* limitations under the License.
*/

package org.jetbrains.dokka.analysis.kotlin.descriptors.compiler.configuration
/**
* DO NOT MOVE IT
* This is a hack for https://github.com/Kotlin/dokka/issues/1599
*
* Copy-pasted from 1.9.20-Beta-1
* Can be removed for Kotlin compiler 1.9.20 and later
*
* It makes this class threadsafe for Dokka
*/
@file:Suppress("PackageDirectoryMismatch")
package org.jetbrains.kotlin.cli.jvm.index

import com.intellij.ide.highlighter.JavaClassFileType
import com.intellij.ide.highlighter.JavaFileType
import com.intellij.openapi.vfs.VfsUtilCore
import com.intellij.openapi.vfs.VirtualFile
import gnu.trove.THashMap
import it.unimi.dsi.fastutil.ints.IntArrayList
import org.jetbrains.kotlin.cli.jvm.index.JavaRoot
import org.jetbrains.kotlin.cli.jvm.index.JvmDependenciesIndex
import org.jetbrains.kotlin.name.ClassId
import org.jetbrains.kotlin.name.FqName
import java.util.*
import java.util.concurrent.locks.ReentrantLock
import kotlin.concurrent.withLock

// speeds up finding files/classes in classpath/java source roots
// NOT THREADSAFE, needs to be adapted/removed if we want compiler to be multithreaded
// TODO: KT-58327 needs to be adapted/removed if we want compiler to be multithreaded
// the main idea of this class is for each package to store roots which contains it to avoid excessive file system traversal
internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependenciesIndex {
class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependenciesIndex {
private val lock = ReentrantLock()

//these fields are computed based on _roots passed to constructor which are filled in later
private val roots: List<JavaRoot> by lazy { _roots.toList() }

Expand All @@ -46,7 +58,8 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
// indices of roots that are known to contain this package
// if this list contains [1, 3, 5] then roots with indices 1, 3 and 5 are known to contain this package, 2 and 4 are known not to (no information about roots 6 or higher)
// if this list contains maxIndex that means that all roots containing this package are known
val rootIndices = IntArrayList(2)
@Suppress("DEPRECATION") // TODO: fix deprecation
val rootIndices = com.intellij.util.containers.IntArrayList(2)
}

// root "Cache" object corresponds to DefaultPackage which exists in every root. Roots with non-default fqname are also listed here but
Expand All @@ -55,7 +68,7 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
Cache().apply {
roots.indices.forEach(rootIndices::add)
rootIndices.add(maxIndex)
rootIndices.trimToSize(0)
rootIndices.trimToSize()
}
}

Expand All @@ -74,8 +87,10 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
acceptedRootTypes: Set<JavaRoot.RootType>,
continueSearch: (VirtualFile, JavaRoot.RootType) -> Boolean
) {
search(TraverseRequest(packageFqName, acceptedRootTypes)) { dir, rootType ->
if (continueSearch(dir, rootType)) null else Unit
lock.withLock {
search(TraverseRequest(packageFqName, acceptedRootTypes)) { dir, rootType ->
if (continueSearch(dir, rootType)) null else Unit
}
}
}

Expand All @@ -85,34 +100,37 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
acceptedRootTypes: Set<JavaRoot.RootType>,
findClassGivenDirectory: (VirtualFile, JavaRoot.RootType) -> T?
): T? {
// make a decision based on information saved from last class search
if (lastClassSearch?.first?.classId != classId) {
return search(FindClassRequest(classId, acceptedRootTypes), findClassGivenDirectory)
}
lock.withLock {
// TODO: KT-58327 probably should be changed to thread local to fix fast-path
// make a decision based on information saved from last class search
if (lastClassSearch?.first?.classId != classId) {
return search(FindClassRequest(classId, acceptedRootTypes), findClassGivenDirectory)
}

val (cachedRequest, cachedResult) = lastClassSearch!!
return when (cachedResult) {
is SearchResult.NotFound -> {
val limitedRootTypes = acceptedRootTypes - cachedRequest.acceptedRootTypes
if (limitedRootTypes.isEmpty()) {
null
} else {
search(FindClassRequest(classId, limitedRootTypes), findClassGivenDirectory)
val (cachedRequest, cachedResult) = lastClassSearch!!
return when (cachedResult) {
is SearchResult.NotFound -> {
val limitedRootTypes = acceptedRootTypes - cachedRequest.acceptedRootTypes
if (limitedRootTypes.isEmpty()) {
null
} else {
search(FindClassRequest(classId, limitedRootTypes), findClassGivenDirectory)
}
}
}
is SearchResult.Found -> {
if (cachedRequest.acceptedRootTypes == acceptedRootTypes) {
findClassGivenDirectory(cachedResult.packageDirectory, cachedResult.root.type)
} else {
search(FindClassRequest(classId, acceptedRootTypes), findClassGivenDirectory)
is SearchResult.Found -> {
if (cachedRequest.acceptedRootTypes == acceptedRootTypes) {
findClassGivenDirectory(cachedResult.packageDirectory, cachedResult.root.type)
} else {
search(FindClassRequest(classId, acceptedRootTypes), findClassGivenDirectory)
}
}
}
}
}

private fun <T : Any> search(request: SearchRequest, handler: (VirtualFile, JavaRoot.RootType) -> T?): T? {
// a list of package sub names, ["org", "jb", "kotlin"]
val packagesPath = request.packageFqName.pathSegments().map { it.identifier }
val packagesPath = request.packageFqName.pathSegments().map { it.identifierOrNullIfSpecial ?: return null }
// a list of caches corresponding to packages, [default, "org", "org.jb", "org.jb.kotlin"]
val caches = cachesPath(packagesPath)

Expand All @@ -122,12 +140,11 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
// NOTE: indices manipulation instead of using caches.reversed() is here for performance reasons
for (cacheIndex in caches.lastIndex downTo 0) {
val cacheRootIndices = caches[cacheIndex].rootIndices
for (i in 0 until cacheRootIndices.size) {
val rootIndex = cacheRootIndices.getInt(i)
for (i in 0 until cacheRootIndices.size()) {
val rootIndex = cacheRootIndices[i]
if (rootIndex <= processedRootsUpTo) continue // roots with those indices have been processed by now

val directoryInRoot =
travelPath(rootIndex, request.packageFqName, packagesPath, cacheIndex, caches) ?: continue
val directoryInRoot = travelPath(rootIndex, request.packageFqName, packagesPath, cacheIndex, caches) ?: continue
val root = roots[rootIndex]
if (root.type in request.acceptedRootTypes) {
val result = handler(directoryInRoot, root.type)
Expand All @@ -139,12 +156,7 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
}
}
}
processedRootsUpTo =
if (cacheRootIndices.isEmpty()) {
processedRootsUpTo
} else {
cacheRootIndices.getInt(cacheRootIndices.size - 1)
}
processedRootsUpTo = if (cacheRootIndices.isEmpty) processedRootsUpTo else cacheRootIndices[cacheRootIndices.size() - 1]
}

if (request is FindClassRequest) {
Expand All @@ -166,15 +178,13 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
for (i in (fillCachesAfter + 1) until cachesPath.size) {
// we all know roots that contain this package by now
cachesPath[i].rootIndices.add(maxIndex)
cachesPath[i].rootIndices.trimToSize(0)
cachesPath[i].rootIndices.trimToSize()
}
return null
}

return synchronized(packageCache) {
packageCache[rootIndex].getOrPut(packageFqName.asString()) {
doTravelPath(rootIndex, packagesPath, fillCachesAfter, cachesPath)
}
return packageCache[rootIndex].getOrPut(packageFqName.asString()) {
doTravelPath(rootIndex, packagesPath, fillCachesAfter, cachesPath)
}
}

Expand Down Expand Up @@ -236,12 +246,7 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie
return caches
}

private fun <E> MutableList<E>.trimToSize(newSize: Int) {
subList(newSize, size).clear()
}

private data class FindClassRequest(val classId: ClassId, override val acceptedRootTypes: Set<JavaRoot.RootType>) :
SearchRequest {
private data class FindClassRequest(val classId: ClassId, override val acceptedRootTypes: Set<JavaRoot.RootType>) : SearchRequest {
override val packageFqName: FqName
get() = classId.packageFqName
}
Expand All @@ -261,4 +266,4 @@ internal class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependencie

object NotFound : SearchResult()
}
}
}
13 changes: 11 additions & 2 deletions .../dokka/analysis/kotlin/descriptors/compiler/configuration/KotlinCliJavaFileManagerImpl.kt
View file
Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,17 @@
* limitations under the License.
*/

package org.jetbrains.dokka.analysis.kotlin.descriptors.compiler.configuration
/**
* DO NOT MOVE IT
* This is a hack for https://github.com/Kotlin/dokka/issues/1599
*
* Copy-pasted from Kotlin compiler
*
* It makes this class threadsafe (`topLevelClassesCache` and `binaryCache`) for Dokka
*
*/
@file:Suppress("PackageDirectoryMismatch")
package org.jetbrains.kotlin.cli.jvm.compiler

import com.intellij.core.CoreJavaFileManager
import com.intellij.openapi.diagnostic.Logger
Expand All @@ -25,7 +35,6 @@ import com.intellij.psi.impl.file.PsiPackageImpl
import com.intellij.psi.search.GlobalSearchScope
import gnu.trove.THashMap
import gnu.trove.THashSet
import org.jetbrains.kotlin.cli.jvm.compiler.JvmPackagePartProvider
import org.jetbrains.kotlin.cli.jvm.index.JavaRoot
import org.jetbrains.kotlin.cli.jvm.index.JvmDependenciesIndex
import org.jetbrains.kotlin.cli.jvm.index.SingleJavaFileRootsIndex
Expand Down

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