454 CPKlassSlot kslot = this_cp->klass_slot_at(which);
455 int resolved_klass_index = kslot.resolved_klass_index();
456 int name_index = kslot.name_index();
457 assert(this_cp->tag_at(name_index).is_symbol(), "sanity");
458
459 Klass* klass = this_cp->resolved_klasses()->at(resolved_klass_index);
460 if (klass != NULL) {
461 return klass;
462 }
463
464 // This tag doesn't change back to unresolved class unless at a safepoint.
465 if (this_cp->tag_at(which).is_unresolved_klass_in_error()) {
466 // The original attempt to resolve this constant pool entry failed so find the
467 // class of the original error and throw another error of the same class
468 // (JVMS 5.4.3).
469 // If there is a detail message, pass that detail message to the error.
470 // The JVMS does not strictly require us to duplicate the same detail message,
471 // or any internal exception fields such as cause or stacktrace. But since the
472 // detail message is often a class name or other literal string, we will repeat it
473 // if we can find it in the symbol table.
474 throw_resolution_error(this_cp, which, CHECK_0);
475 ShouldNotReachHere();
476 }
477
478 Handle mirror_handle;
479 Symbol* name = this_cp->symbol_at(name_index);
480 Handle loader (THREAD, this_cp->pool_holder()->class_loader());
481 Handle protection_domain (THREAD, this_cp->pool_holder()->protection_domain());
482 Klass* k = SystemDictionary::resolve_or_fail(name, loader, protection_domain, true, THREAD);
483 if (!HAS_PENDING_EXCEPTION) {
484 // preserve the resolved klass from unloading
485 mirror_handle = Handle(THREAD, k->java_mirror());
486 // Do access check for klasses
487 verify_constant_pool_resolve(this_cp, k, THREAD);
488 }
489
490 // Failed to resolve class. We must record the errors so that subsequent attempts
491 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
492 if (HAS_PENDING_EXCEPTION) {
493 if (save_resolution_error) {
494 save_and_throw_exception(this_cp, which, constantTag(JVM_CONSTANT_UnresolvedClass), CHECK_NULL);
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454 CPKlassSlot kslot = this_cp->klass_slot_at(which);
455 int resolved_klass_index = kslot.resolved_klass_index();
456 int name_index = kslot.name_index();
457 assert(this_cp->tag_at(name_index).is_symbol(), "sanity");
458
459 Klass* klass = this_cp->resolved_klasses()->at(resolved_klass_index);
460 if (klass != NULL) {
461 return klass;
462 }
463
464 // This tag doesn't change back to unresolved class unless at a safepoint.
465 if (this_cp->tag_at(which).is_unresolved_klass_in_error()) {
466 // The original attempt to resolve this constant pool entry failed so find the
467 // class of the original error and throw another error of the same class
468 // (JVMS 5.4.3).
469 // If there is a detail message, pass that detail message to the error.
470 // The JVMS does not strictly require us to duplicate the same detail message,
471 // or any internal exception fields such as cause or stacktrace. But since the
472 // detail message is often a class name or other literal string, we will repeat it
473 // if we can find it in the symbol table.
474 throw_resolution_error(this_cp, which, CHECK_NULL);
475 ShouldNotReachHere();
476 }
477
478 Handle mirror_handle;
479 Symbol* name = this_cp->symbol_at(name_index);
480 Handle loader (THREAD, this_cp->pool_holder()->class_loader());
481 Handle protection_domain (THREAD, this_cp->pool_holder()->protection_domain());
482 Klass* k = SystemDictionary::resolve_or_fail(name, loader, protection_domain, true, THREAD);
483 if (!HAS_PENDING_EXCEPTION) {
484 // preserve the resolved klass from unloading
485 mirror_handle = Handle(THREAD, k->java_mirror());
486 // Do access check for klasses
487 verify_constant_pool_resolve(this_cp, k, THREAD);
488 }
489
490 // Failed to resolve class. We must record the errors so that subsequent attempts
491 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
492 if (HAS_PENDING_EXCEPTION) {
493 if (save_resolution_error) {
494 save_and_throw_exception(this_cp, which, constantTag(JVM_CONSTANT_UnresolvedClass), CHECK_NULL);
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