src/hotspot/share/ci/ciInstanceKlass.cpp

rev 58565 : 8238358: Implementation of JEP 371: Hidden Classes
Reviewed-by: duke
Contributed-by: mandy.chung@oracle.com, lois.foltan@oracle.com, david.holmes@oracle.com, harold.seigel@oracle.com, serguei.spitsyn@oracle.com, alex.buckley@oracle.com, jamsheed.c.m@oracle.com

*** 61,87 ****
    _init_state = ik->init_state();
    _nonstatic_field_size = ik->nonstatic_field_size();
    _has_nonstatic_fields = ik->has_nonstatic_fields();
    _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
    _is_unsafe_anonymous = ik->is_unsafe_anonymous();
    _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
    _has_injected_fields = -1;
    _implementor = NULL; // we will fill these lazily
  
    // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
    // This is primarily useful for metadata which is considered as weak roots
    // by the GC but need to be strong roots if reachable from a current compilation.
    // InstanceKlass are created for both weak and strong metadata.  Ensuring this metadata
    // alive covers the cases where there are weak roots without performance cost.
    oop holder = ik->klass_holder();
!   if (ik->is_unsafe_anonymous()) {
      // Though ciInstanceKlass records class loader oop, it's not enough to keep
!     // VM unsafe anonymous classes alive (loader == NULL). Klass holder should
      // be used instead. It is enough to record a ciObject, since cached elements are never removed
      // during ciObjectFactory lifetime. ciObjectFactory itself is created for
      // every compilation and lives for the whole duration of the compilation.
!     assert(holder != NULL, "holder of unsafe anonymous class is the mirror which is never null");
      (void)CURRENT_ENV->get_object(holder);
    }
  
    Thread *thread = Thread::current();
    if (ciObjectFactory::is_initialized()) {
--- 61,88 ----
    _init_state = ik->init_state();
    _nonstatic_field_size = ik->nonstatic_field_size();
    _has_nonstatic_fields = ik->has_nonstatic_fields();
    _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
    _is_unsafe_anonymous = ik->is_unsafe_anonymous();
+   _is_hidden = ik->is_hidden();
    _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
    _has_injected_fields = -1;
    _implementor = NULL; // we will fill these lazily
  
    // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
    // This is primarily useful for metadata which is considered as weak roots
    // by the GC but need to be strong roots if reachable from a current compilation.
    // InstanceKlass are created for both weak and strong metadata.  Ensuring this metadata
    // alive covers the cases where there are weak roots without performance cost.
    oop holder = ik->klass_holder();
!   if (ik->class_loader_data()->has_class_mirror_holder()) {
      // Though ciInstanceKlass records class loader oop, it's not enough to keep
!     // VM weak hidden and unsafe anonymous classes alive (loader == NULL). Klass holder should
      // be used instead. It is enough to record a ciObject, since cached elements are never removed
      // during ciObjectFactory lifetime. ciObjectFactory itself is created for
      // every compilation and lives for the whole duration of the compilation.
!     assert(holder != NULL, "holder of hidden or unsafe anonymous class is the mirror which is never null");
      (void)CURRENT_ENV->get_object(holder);
    }
  
    Thread *thread = Thread::current();
    if (ciObjectFactory::is_initialized()) {
*** 121,130 ****
--- 122,132 ----
    _nonstatic_field_size = -1;
    _has_nonstatic_fields = false;
    _nonstatic_fields = NULL;
    _has_injected_fields = -1;
    _is_unsafe_anonymous = false;
+   _is_hidden = false;
    _loader = loader;
    _protection_domain = protection_domain;
    _is_shared = false;
    _super = NULL;
    _java_mirror = NULL;