8068162: jvmtiRedefineClasses.cpp: guarantee(false) failed: OLD and/or OBSOLETE method(s) found

Summary: adjust Unsafe methods in the itable/vtable if Unsafe is redefined
Reviewed-by: coleenp, dcubed
Contributed-by: serguei.spitsyn@oracle.com

src/share/vm/memory/universe.cpp

@@ -114,6 +114,7 @@ oop Universe::_the_min_jint_string                   = NULL;
 LatestMethodCache* Universe::_finalizer_register_cache = NULL;
 LatestMethodCache* Universe::_loader_addClass_cache    = NULL;
 LatestMethodCache* Universe::_pd_implies_cache         = NULL;
+LatestMethodCache* Universe::_throw_illegal_access_error_cache = NULL;
 oop Universe::_out_of_memory_error_java_heap          = NULL;
 oop Universe::_out_of_memory_error_metaspace          = NULL;
 oop Universe::_out_of_memory_error_class_metaspace    = NULL;
@@ -129,7 +130,6 @@ oop Universe::_virtual_machine_error_instance         = NULL;
 oop Universe::_vm_exception                           = NULL;
 oop Universe::_allocation_context_notification_obj    = NULL;
 
-Method* Universe::_throw_illegal_access_error         = NULL;
 Array<int>* Universe::_the_empty_int_array            = NULL;
 Array<u2>* Universe::_the_empty_short_array           = NULL;
 Array<Klass*>* Universe::_the_empty_klass_array     = NULL;
@@ -235,6 +235,7 @@ void Universe::serialize(SerializeClosure* f, bool do_all) {
   _finalizer_register_cache->serialize(f);
   _loader_addClass_cache->serialize(f);
   _pd_implies_cache->serialize(f);
+  _throw_illegal_access_error_cache->serialize(f);
 }
 
 void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
@@ -663,6 +664,7 @@ jint universe_init() {
   Universe::_finalizer_register_cache = new LatestMethodCache();
   Universe::_loader_addClass_cache    = new LatestMethodCache();
   Universe::_pd_implies_cache         = new LatestMethodCache();
+  Universe::_throw_illegal_access_error_cache = new LatestMethodCache();
 
   if (UseSharedSpaces) {
     // Read the data structures supporting the shared spaces (shared
@@ -1135,7 +1137,8 @@ bool universe_post_init() {
     tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method");
     return false; // initialization failed (cannot throw exception yet)
   }
-  Universe::_throw_illegal_access_error = m;
+  Universe::_throw_illegal_access_error_cache->init(
+    SystemDictionary::misc_Unsafe_klass(), m);
 
   // Setup method for registering loaded classes in class loader vector
   InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false);
@@ -1161,7 +1164,7 @@ bool universe_post_init() {
       return false; // initialization failed
     }
     Universe::_pd_implies_cache->init(
-      SystemDictionary::ProtectionDomain_klass(), m);;
+      SystemDictionary::ProtectionDomain_klass(), m);
   }
 
   // The folowing is initializing converter functions for serialization in

src/share/vm/memory/universe.hpp

@@ -148,8 +148,7 @@ class Universe: AllStatic {
   static LatestMethodCache* _finalizer_register_cache; // static method for registering finalizable objects
   static LatestMethodCache* _loader_addClass_cache;    // method for registering loaded classes in class loader vector
   static LatestMethodCache* _pd_implies_cache;         // method for checking protection domain attributes
-
-  static Method* _throw_illegal_access_error;
+  static LatestMethodCache* _throw_illegal_access_error_cache; // Unsafe.throwIllegalAccessError() method
 
   // preallocated error objects (no backtrace)
   static oop          _out_of_memory_error_java_heap;
@@ -305,6 +304,7 @@ class Universe: AllStatic {
   static Method*      loader_addClass_method()        { return _loader_addClass_cache->get_method(); }
 
   static Method*      protection_domain_implies_method() { return _pd_implies_cache->get_method(); }
+  static Method*      throw_illegal_access_error()    { return _throw_illegal_access_error_cache->get_method(); }
 
   static oop          null_ptr_exception_instance()   { return _null_ptr_exception_instance;   }
   static oop          arithmetic_exception_instance() { return _arithmetic_exception_instance; }
@@ -314,8 +314,6 @@ class Universe: AllStatic {
   static inline oop   allocation_context_notification_obj();
   static inline void  set_allocation_context_notification_obj(oop obj);
 
-  static Method*      throw_illegal_access_error()    { return _throw_illegal_access_error; }
-
   static Array<int>*       the_empty_int_array()    { return _the_empty_int_array; }
   static Array<u2>*        the_empty_short_array()  { return _the_empty_short_array; }
   static Array<Method*>* the_empty_method_array() { return _the_empty_method_array; }

src/share/vm/prims/jvmtiRedefineClasses.cpp

@@ -3378,7 +3378,9 @@ void VM_RedefineClasses::AdjustCpoolCacheAndVtable::do_klass(Klass* k) {
     // not yet in the vtable, because the vtable setup is in progress.
     // This must be done after we adjust the default_methods and
     // default_vtable_indices for methods already in the vtable.
+    // If redefining Unsafe, walk all the vtables looking for entries.
     if (ik->vtable_length() > 0 && (_the_class_oop->is_interface()
+        || _the_class_oop == SystemDictionary::misc_Unsafe_klass()
         || ik->is_subtype_of(_the_class_oop))) {
       // ik->vtable() creates a wrapper object; rm cleans it up
       ResourceMark rm(_thread);
@@ -3393,7 +3395,9 @@ void VM_RedefineClasses::AdjustCpoolCacheAndVtable::do_klass(Klass* k) {
     // interface, then we have to call adjust_method_entries() for
     // every InstanceKlass that has an itable since there isn't a
     // subclass relationship between an interface and an InstanceKlass.
+    // If redefining Unsafe, walk all the itables looking for entries.
     if (ik->itable_length() > 0 && (_the_class_oop->is_interface()
+        || _the_class_oop == SystemDictionary::misc_Unsafe_klass()
         || ik->is_subclass_of(_the_class_oop))) {
       // ik->itable() creates a wrapper object; rm cleans it up
       ResourceMark rm(_thread);