7195867: NPG: SAJDI tests fail with sun.jvm.hotspot.types.WrongTypeException:...

7195867: NPG: SAJDI tests fail with sun.jvm.hotspot.types.WrongTypeException: No suitable match for type
Summary: Need to restore the vtable in metadata when we restore the type from the shared archive.
Reviewed-by: acorn, jcoomes, jmasa, jrose

src/share/vm/memory/metaspaceShared.cpp

@@ -153,9 +153,9 @@ static void calculate_fingerprints() {
 //
 // Execution time:
 //   First virtual method call for any object of these metadata types:
-//   1. object->klass->klass_part
-//   2. vtable entry for that klass_part points to the jump table entries
-//   3. branches to common_code with %O0/klass_part, %L0: Klass index <<8 + method index
+//   1. object->klass
+//   2. vtable entry for that klass points to the jump table entries
+//   3. branches to common_code with %O0/klass, %L0: Klass index <<8 + method index
 //   4. common_code:
 //      Get address of new vtbl pointer for this Klass from updated table
 //      Update new vtbl pointer in the Klass: future virtual calls go direct

src/share/vm/oops/constantPool.cpp

@@ -152,6 +152,10 @@ void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data,
 
 // CDS support. Create a new resolved_references array.
 void ConstantPool::restore_unshareable_info(TRAPS) {
+
+  // restore the C++ vtable from the shared archive
+  restore_vtable();
+
   if (SystemDictionary::Object_klass_loaded()) {
     // Recreate the object array and add to ClassLoaderData.
     int map_length = resolved_reference_length();

src/share/vm/oops/constantPool.hpp

@@ -643,6 +643,11 @@ class ConstantPool : public Metadata {
   void remove_unshareable_info();
   void restore_unshareable_info(TRAPS);
   bool resolve_class_constants(TRAPS);
+  // The ConstantPool vtable is restored by this call when the ConstantPool is
+  // in the shared archive.  See patch_klass_vtables() in metaspaceShared.cpp for
+  // all the gory details.  SA, dtrace and pstack helpers distinguish metadata
+  // by their vtable.
+  void restore_vtable() { guarantee(is_constantPool(), "vtable restored by this call"); }
 
  private:
   enum { _no_index_sentinel = -1, _possible_index_sentinel = -2 };

src/share/vm/oops/instanceKlass.cpp

@@ -2165,6 +2165,8 @@ void InstanceKlass::restore_unshareable_info(TRAPS) {
   for (int index2 = 0; index2 < num_methods; ++index2) {
     methodHandle m(THREAD, methods->at(index2));
     m()->link_method(m, CHECK);
+    // restore method's vtable by calling a virtual function
+    m->restore_vtable();
   }
   if (JvmtiExport::has_redefined_a_class()) {
     // Reinitialize vtable because RedefineClasses may have changed some

src/share/vm/oops/method.hpp

@@ -168,9 +168,16 @@ class Method : public Metadata {
                             TRAPS);
 
   Method() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
+
+  // The Method vtable is restored by this call when the Method is in the
+  // shared archive.  See patch_klass_vtables() in metaspaceShared.cpp for
+  // all the gory details.  SA, dtrace and pstack helpers distinguish metadata
+  // by their vtable.
+  void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); }
   bool is_method() const volatile { return true; }
 
   // accessors for instance variables
+
   ConstMethod* constMethod() const             { return _constMethod; }
   void set_constMethod(ConstMethod* xconst)    { _constMethod = xconst; }