8232588: G1 concurrent System.gc can return early or late
8233279: G1: GCLocker GC with +GCLockerInvokesConcurrent spins while cycle in progress
Summary: Refactor G1CH::try_collect and fix bugs with concurrent collections.
Reviewed-by: tschatzl, sjohanss
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/*
* @test
* @bug 6731826
* @summary There should be no RuntimeException.
* @run main TestRaceCond
*/
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
public class TestRaceCond {
public static void main(String argv[]) {
trial();
}
static void trial() {
PrintService pserv1 = PrintServiceLookup.lookupDefaultPrintService();
PrintService[] pservs = PrintServiceLookup.lookupPrintServices(null, null);
PrintService pserv2 = PrintServiceLookup.lookupDefaultPrintService();
if ((pserv1 == null) || (pserv2==null)) {
return;
}
if (pserv1.hashCode() != pserv2.hashCode()) {
throw new RuntimeException("Different hashCodes for equal print "
+ "services: " + pserv1.hashCode() + " "
+ pserv2.hashCode());
}
}
}