Review Request: 8187442 Xcheck:jni produces various "WARNING in native method" in launcher
david.holmes at oracle.com
Tue Sep 12 20:56:17 UTC 2017
On 13/09/2017 5:18 AM, Sergey Bylokhov wrote:
> Please review the fix for jdk10/jdk10.
> Bug: https://bugs.openjdk.java.net/browse/JDK-8187442
> Webrev can be found at: http://cr.openjdk.java.net/~serb/8187442/webrev.00
This doesn't look right to me:
str = (*env)->CallStaticObjectMethod(env, cls,
makePlatformStringMID, USE_STDERR, ary);
If there is an exception pending you fail to delete the local ref. And
there's no need to clear the exception before calling DeleteLocalRef as
that is okay to call with a pending exception. But there is no point
returning zero if an exception occurred because in that case str will
already be 0/NULL.
The same here:
1596 appClass = (*env)->CallStaticObjectMethod(env, cls, mid);
1598 return appClass;
If an exception is pending then appClass will be 0/NULL.
In addition CHECK_EXCEPTION_RETURN_VALUE doesn't clear the pending
exception so I can't see what warnings this would be clearing up ???
> The simple application with empty main method produce some "warnings"
> when Xcheck:jni is used. Because of that it is hard to cleanup other
> parts of jdk from such warnings.
> Two additional checks were added, in both cases the new code will return
> 0 in the same way as NULL_CHECK0 in the same methods.
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