From 2b2fce5949473e31e1297904451ebecb053b36ab Mon Sep 17 00:00:00 2001
From: Alexander Gorshenev <alexander.gorshenev@jetbrains.com>
Date: Thu, 18 Jun 2020 18:34:08 +0300
Subject: [PATCH] Fix for KT-37761. Don't use mmap. It causes more troubles
 than it produce benefits

---
 .../jetbrains/kotlin/library/impl/IrFileReaders.kt   | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt
index 2797991f46d..c6e8bfdf5d8 100644
--- a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt
+++ b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt
@@ -34,7 +34,7 @@ abstract class IrArrayReader(private val buffer: ByteBuffer) {
     }
 }
 
-class IrArrayFileReader(file: File) : IrArrayReader(file.memoryMappedBuffer)
+class IrArrayFileReader(file: File) : IrArrayReader(file.readBuffer)
 class IrArrayMemoryReader(bytes: ByteArray) : IrArrayReader(bytes.buffer)
 
 abstract class IrMultiArrayReader(private val buffer: ByteBuffer) {
@@ -85,7 +85,7 @@ abstract class IrMultiArrayReader(private val buffer: ByteBuffer) {
     }
 }
 
-class IrMultiArrayFileReader(file: File) : IrMultiArrayReader(file.memoryMappedBuffer)
+class IrMultiArrayFileReader(file: File) : IrMultiArrayReader(file.readBuffer)
 class IrMultiArrayMemoryReader(bytes: ByteArray) : IrMultiArrayReader(bytes.buffer)
 
 abstract class IrMultiTableReader<K>(private val buffer: ByteBuffer, private val keyReader: ByteBuffer.() -> K) {
@@ -169,16 +169,16 @@ abstract class IrTableReader<K>(private val buffer: ByteBuffer, keyReader: ByteB
     }
 }
 
-val File.memoryMappedBuffer: ByteBuffer get() = map(FileChannel.MapMode.READ_ONLY)
+val File.readBuffer: ByteBuffer get() = this.readBytes().buffer
 val ByteArray.buffer: ByteBuffer get() = ByteBuffer.wrap(this)
 
-class IndexIrTableFileReader(file: File) : IrTableReader<Long>(file.memoryMappedBuffer, { long })
+class IndexIrTableFileReader(file: File) : IrTableReader<Long>(file.readBuffer, { long })
 class IndexIrTableMemoryReader(bytes: ByteArray) : IrTableReader<Long>(bytes.buffer, { long })
 
 data class DeclarationId(val id: Int)
 
-class DeclarationIrTableFileReader(file: File) : IrTableReader<DeclarationId>(file.memoryMappedBuffer, { DeclarationId(int) })
+class DeclarationIrTableFileReader(file: File) : IrTableReader<DeclarationId>(file.readBuffer, { DeclarationId(int) })
 class DeclarationIrTableMemoryReader(bytes: ByteArray) : IrTableReader<DeclarationId>(bytes.buffer, { DeclarationId(int) })
 
-class DeclarationIrMultiTableFileReader(file: File) : IrMultiTableReader<DeclarationId>(file.memoryMappedBuffer, { DeclarationId(int) })
+class DeclarationIrMultiTableFileReader(file: File) : IrMultiTableReader<DeclarationId>(file.readBuffer, { DeclarationId(int) })
 class DeclarationIrMultiTableMemoryReader(bytes: ByteArray) : IrMultiTableReader<DeclarationId>(bytes.buffer, { DeclarationId(int) })
\ No newline at end of file