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Don't use sun.misc.Unsafe when IKVM.NET is used (#9042)

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Motivation:

IKVM.NET seems to ship a bug sun.misc.Unsafe class, for this reason we should better disable our sun.misc.Unsafe usage when we detect IKVM.NET is used.

Modifications:

Check if IKVM.NET is used and if so do not use sun.misc.Unsafe by default.

Result:

Fixes https://github.com/netty/netty/issues/9035 and https://github.com/netty/netty/issues/8916.
This commit is contained in:
Norman Maurer 2019-04-12 22:41:53 +02:00 committed by GitHub
parent 48edf40861
commit 34aa2c841c
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1 changed files with 19 additions and 0 deletions
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19
common/src/main/java/io/netty/util/internal/PlatformDependent.java
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@ -75,6 +75,7 @@ public final class PlatformDependent {
private static final boolean IS_WINDOWS = isWindows0();
private static final boolean IS_OSX = isOsx0();
private static final boolean IS_J9_JVM = isJ9Jvm0();
private static final boolean IS_IVKVM_DOT_NET = isIkvmDotNet0();
private static final boolean MAYBE_SUPER_USER;
@ -953,6 +954,12 @@ public final class PlatformDependent {
logger.debug("sun.misc.Unsafe: unavailable (Android)");
return new UnsupportedOperationException("sun.misc.Unsafe: unavailable (Android)");
}
if (isIkvmDotNet()) {
logger.debug("sun.misc.Unsafe: unavailable (IKVM.NET)");
return new UnsupportedOperationException("sun.misc.Unsafe: unavailable (IKVM.NET)");
}
Throwable cause = PlatformDependent0.getUnsafeUnavailabilityCause();
if (cause != null) {
return cause;
@ -982,6 +989,18 @@ public final class PlatformDependent {
return vmName.startsWith("ibm j9") || vmName.startsWith("eclipse openj9");
}
/**
* Returns {@code true} if the running JVM is <a href="https://www.ikvm.net">IKVM.NET</a>, {@code false} otherwise.
*/
public static boolean isIkvmDotNet() {
return IS_IVKVM_DOT_NET;
}
private static boolean isIkvmDotNet0() {
String vmName = SystemPropertyUtil.get("java.vm.name", "").toUpperCase(Locale.US);
return vmName.equals("IKVM.NET");
}
private static long maxDirectMemory0() {
long maxDirectMemory = 0;