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[platform] fixes direct access to internal JDK API

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This commit is contained in:
Roman Shevchenko
2016-01-29 20:15:34 +03:00
parent 50ea805732
commit f50e99ed18
1 changed files with 21 additions and 2 deletions
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platform/util/src/com/intellij/util/io/PagedFileStorage.java
+21 -2
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@@ -25,12 +25,12 @@ import com.intellij.util.containers.hash.LinkedHashMap;
import jsr166e.extra.SequenceLock;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import sun.misc.VM;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.*;
@@ -53,13 +53,32 @@ public class PagedFileStorage implements Forceable {
final int upper = SystemInfo.is64Bit ? 500 : 200;
BUFFER_SIZE = Math.max(1, SystemProperties.getIntProperty("idea.paged.storage.page.size", 10)) * MB;
final long max = VM.maxDirectMemory() - 2 * BUFFER_SIZE;
final long max = maxDirectMemory() - 2 * BUFFER_SIZE;
LOWER_LIMIT = (int)Math.min(lower * MB, max);
UPPER_LIMIT = (int)Math.min(Math.max(LOWER_LIMIT, SystemProperties.getIntProperty("idea.max.paged.storage.cache", upper) * MB), max);
LOG.info("lower=" + (LOWER_LIMIT / MB) + "; upper=" + (UPPER_LIMIT / MB) + "; buffer=" + (BUFFER_SIZE / MB) + "; max=" + (max / MB));
}
private static long maxDirectMemory() {
try {
Class<?> aClass = Class.forName("sun.misc.VM");
Method maxDirectMemory = aClass.getMethod("maxDirectMemory");
return (Long)maxDirectMemory.invoke(null);
}
catch (Throwable ignore) { }
try {
Class<?> aClass = Class.forName("java.nio.Bits");
Field maxMemory = aClass.getDeclaredField("maxMemory");
maxMemory.setAccessible(true);
return (Long)maxMemory.get(null);
}
catch (Throwable ignore) { }
return Runtime.getRuntime().maxMemory();
}
private static final int UNKNOWN_PAGE = -1;
private static final int MAX_PAGES_COUNT = 0xFFFF;
private static final int MAX_LIVE_STORAGES_COUNT = 0xFFFF;