6989669: Coops: -Xshare:dump causes crash

Temporarily fix to disable compressed oops with CDS

Reviewed-by: dholmes, twisti, kvn, never

hotspot/src/share/vm/runtime/arguments.cpp

@@ -2979,6 +2979,13 @@ jint Arguments::parse(const JavaVMInitArgs* args) {
   UseCompressedOops = false;
 #endif
 
+#if defined(_LP64)
+  if ((DumpSharedSpaces || RequireSharedSpaces) && UseCompressedOops) {
+    // Disable compressed oops with shared spaces
+    UseCompressedOops = false;
+  }
+#endif
+
   // Set object alignment values.
   set_object_alignment();
 

hotspot/src/share/vm/runtime/globals.hpp

@@ -3545,7 +3545,7 @@ class CommandLineFlags {
   product(uintx, SharedDummyBlockSize, 512*M,                               \
           "Size of dummy block used to shift heap addresses (in bytes)")    \
                                                                             \
-  product(uintx, SharedReadWriteSize,  12*M,                                \
+  product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(13*M),      \
           "Size of read-write space in permanent generation (in bytes)")    \
                                                                             \
   product(uintx, SharedReadOnlySize,   10*M,                                \