RFR(XS) 8193897 - JDK-8191374 caused windows_i586 build to fail

[Ioi Lam]

Hi,

Please review this fix for jprt breakage.

I'd like to use the trivial fixrule since it affects JPRT.


https://bugs.openjdk.java.net/browse/JDK-8193897


--- a/src/hotspot/share/classfile/classLoader.cpp    Tue Dec 19 11:29:07 
2017 -0800
+++ b/src/hotspot/share/classfile/classLoader.cpp    Wed Dec 20 09:44:58 
2017 -0800
@@ -803,7 +803,7 @@
    bool set_base_piece = true;

  #if INCLUDE_CDS
-  if (DumpSharedSpaces || UseSharedSpaces) {
+  if (DumpSharedSpaces) {
      if (!Arguments::has_jimage()) {
        vm_exit_during_initialization("CDS is not supported in exploded 
JDK build", NULL);
      }


The failure happens on 32-bit platforms where UseSharedSpaces is true by 
default.

We actually just needed to check for DumpSharedSpaces and disable archive
creation for exploded builds.

Without an archive, the user won't be able to run with CDS using an 
exploded build.
(Archive loading checks for the JVM which created the archive, so the 
exploded build
can't use an archive created by another JVM).

Thanks
- Ioi