Mercurial > hg > graal-jvmci-8
diff src/share/vm/ci/ciObjectFactory.cpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
---|---|
date | Tue, 07 Apr 2015 14:58:49 +0200 |
parents | 89152779163c 6a528388c7da |
children | f13e777eb255 |
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--- a/src/share/vm/ci/ciObjectFactory.cpp Tue Apr 07 11:20:51 2015 +0200 +++ b/src/share/vm/ci/ciObjectFactory.cpp Tue Apr 07 14:58:49 2015 +0200 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -46,6 +46,9 @@ #include "oops/oop.inline.hpp" #include "oops/oop.inline2.hpp" #include "runtime/fieldType.hpp" +#if INCLUDE_ALL_GCS +# include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" +#endif // ciObjectFactory // @@ -109,7 +112,7 @@ // This Arena is long lived and exists in the resource mark of the // compiler thread that initializes the initial ciObjectFactory which // creates the shared ciObjects that all later ciObjectFactories use. - Arena* arena = new (mtCompiler) Arena(); + Arena* arena = new (mtCompiler) Arena(mtCompiler); ciEnv initial(arena); ciEnv* env = ciEnv::current(); env->_factory->init_shared_objects(); @@ -236,7 +239,7 @@ ciObject* ciObjectFactory::get(oop key) { ASSERT_IN_VM; - assert(key == NULL || Universe::heap()->is_in_reserved(key), "must be"); + assert(Universe::heap()->is_in_reserved(key), "must be"); NonPermObject* &bucket = find_non_perm(key); if (bucket != NULL) { @@ -257,10 +260,10 @@ } // ------------------------------------------------------------------ -// ciObjectFactory::get +// ciObjectFactory::get_metadata // -// Get the ciObject corresponding to some oop. If the ciObject has -// already been created, it is returned. Otherwise, a new ciObject +// Get the ciMetadata corresponding to some Metadata. If the ciMetadata has +// already been created, it is returned. Otherwise, a new ciMetadata // is created. ciMetadata* ciObjectFactory::get_metadata(Metadata* key) { ASSERT_IN_VM; @@ -287,9 +290,9 @@ } #endif if (!is_found_at(index, key, _ci_metadata)) { - // The ciObject does not yet exist. Create it and insert it + // The ciMetadata does not yet exist. Create it and insert it // into the cache. - ciMetadata* new_object = create_new_object(key); + ciMetadata* new_object = create_new_metadata(key); init_ident_of(new_object); assert(new_object->is_metadata(), "must be"); @@ -341,15 +344,28 @@ } // ------------------------------------------------------------------ -// ciObjectFactory::create_new_object +// ciObjectFactory::create_new_metadata // -// Create a new ciObject from a Metadata*. +// Create a new ciMetadata from a Metadata*. // -// Implementation note: this functionality could be virtual behavior -// of the oop itself. For now, we explicitly marshal the object. -ciMetadata* ciObjectFactory::create_new_object(Metadata* o) { +// Implementation note: in order to keep Metadata live, an auxiliary ciObject +// is used, which points to it's holder. +ciMetadata* ciObjectFactory::create_new_metadata(Metadata* o) { EXCEPTION_CONTEXT; + // Hold metadata from unloading by keeping it's holder alive. + if (_initialized && o->is_klass()) { + Klass* holder = ((Klass*)o); + if (holder->oop_is_instance() && InstanceKlass::cast(holder)->is_anonymous()) { + // Though ciInstanceKlass records class loader oop, it's not enough to keep + // VM 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. + ciObject* h = get(holder->klass_holder()); + } + } + if (o->is_klass()) { KlassHandle h_k(THREAD, (Klass*)o); Klass* k = (Klass*)o; @@ -362,18 +378,51 @@ } } else if (o->is_method()) { methodHandle h_m(THREAD, (Method*)o); - return new (arena()) ciMethod(h_m); + ciEnv *env = CURRENT_THREAD_ENV; + ciInstanceKlass* holder = env->get_instance_klass(h_m()->method_holder()); + return new (arena()) ciMethod(h_m, holder); } else if (o->is_methodData()) { // Hold methodHandle alive - might not be necessary ??? methodHandle h_m(THREAD, ((MethodData*)o)->method()); return new (arena()) ciMethodData((MethodData*)o); } - // The oop is of some type not supported by the compiler interface. + // The Metadata* is of some type not supported by the compiler interface. ShouldNotReachHere(); return NULL; } +// ------------------------------------------------------------------ +// ciObjectFactory::ensure_metadata_alive +// +// 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. +// +void ciObjectFactory::ensure_metadata_alive(ciMetadata* m) { + ASSERT_IN_VM; // We're handling raw oops here. + +#if INCLUDE_ALL_GCS + if (!UseG1GC) { + return; + } + Klass* metadata_owner_klass; + if (m->is_klass()) { + metadata_owner_klass = m->as_klass()->get_Klass(); + } else if (m->is_method()) { + metadata_owner_klass = m->as_method()->get_Method()->constants()->pool_holder(); + } else { + fatal("Not implemented for other types of metadata"); + } + + oop metadata_holder = metadata_owner_klass->klass_holder(); + if (metadata_holder != NULL) { + G1SATBCardTableModRefBS::enqueue(metadata_holder); + } + +#endif +} + //------------------------------------------------------------------ // ciObjectFactory::get_unloaded_method // @@ -667,7 +716,7 @@ // If there is no entry in the cache corresponding to this oop, return // the null tail of the bucket into which the oop should be inserted. ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { - assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); + assert(Universe::heap()->is_in_reserved(key), "must be"); ciMetadata* klass = get_metadata(key->klass()); NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) {