288 lines
11 KiB
C++
288 lines
11 KiB
C++
/*
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* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "gc_implementation/shared/markSweep.inline.hpp"
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#include "interpreter/interpreter.hpp"
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#include "memory/gcLocker.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/constMethodKlass.hpp"
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#include "oops/constMethodOop.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/oop.inline2.hpp"
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#include "runtime/handles.inline.hpp"
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klassOop constMethodKlass::create_klass(TRAPS) {
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constMethodKlass o;
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KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
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KlassHandle k = base_create_klass(h_this_klass, header_size(),
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o.vtbl_value(), CHECK_NULL);
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// Make sure size calculation is right
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assert(k()->size() == align_object_size(header_size()),
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"wrong size for object");
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//java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
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return k();
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}
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int constMethodKlass::oop_size(oop obj) const {
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assert(obj->is_constMethod(), "must be constMethod oop");
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return constMethodOop(obj)->object_size();
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}
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bool constMethodKlass::oop_is_parsable(oop obj) const {
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assert(obj->is_constMethod(), "must be constMethod oop");
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return constMethodOop(obj)->object_is_parsable();
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}
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bool constMethodKlass::oop_is_conc_safe(oop obj) const {
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assert(obj->is_constMethod(), "must be constMethod oop");
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return constMethodOop(obj)->is_conc_safe();
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}
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constMethodOop constMethodKlass::allocate(int byte_code_size,
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int compressed_line_number_size,
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int localvariable_table_length,
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int checked_exceptions_length,
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bool is_conc_safe,
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TRAPS) {
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int size = constMethodOopDesc::object_size(byte_code_size,
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compressed_line_number_size,
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localvariable_table_length,
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checked_exceptions_length);
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KlassHandle h_k(THREAD, as_klassOop());
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constMethodOop cm = (constMethodOop)
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CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);
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assert(!cm->is_parsable(), "Not yet safely parsable");
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No_Safepoint_Verifier no_safepoint;
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cm->set_interpreter_kind(Interpreter::invalid);
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cm->init_fingerprint();
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cm->set_method(NULL);
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cm->set_stackmap_data(NULL);
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cm->set_exception_table(NULL);
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cm->set_code_size(byte_code_size);
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cm->set_constMethod_size(size);
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cm->set_inlined_tables_length(checked_exceptions_length,
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compressed_line_number_size,
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localvariable_table_length);
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assert(cm->size() == size, "wrong size for object");
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cm->set_is_conc_safe(is_conc_safe);
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cm->set_partially_loaded();
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assert(cm->is_parsable(), "Is safely parsable by gc");
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return cm;
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}
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void constMethodKlass::oop_follow_contents(oop obj) {
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assert (obj->is_constMethod(), "object must be constMethod");
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constMethodOop cm = constMethodOop(obj);
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MarkSweep::mark_and_push(cm->adr_method());
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MarkSweep::mark_and_push(cm->adr_stackmap_data());
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MarkSweep::mark_and_push(cm->adr_exception_table());
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// Performance tweak: We skip iterating over the klass pointer since we
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// know that Universe::constMethodKlassObj never moves.
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}
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#ifndef SERIALGC
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void constMethodKlass::oop_follow_contents(ParCompactionManager* cm,
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oop obj) {
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assert (obj->is_constMethod(), "object must be constMethod");
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constMethodOop cm_oop = constMethodOop(obj);
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PSParallelCompact::mark_and_push(cm, cm_oop->adr_method());
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PSParallelCompact::mark_and_push(cm, cm_oop->adr_stackmap_data());
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PSParallelCompact::mark_and_push(cm, cm_oop->adr_exception_table());
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// Performance tweak: We skip iterating over the klass pointer since we
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// know that Universe::constMethodKlassObj never moves.
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}
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#endif // SERIALGC
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int constMethodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
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assert (obj->is_constMethod(), "object must be constMethod");
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constMethodOop cm = constMethodOop(obj);
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blk->do_oop(cm->adr_method());
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blk->do_oop(cm->adr_stackmap_data());
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blk->do_oop(cm->adr_exception_table());
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// Get size before changing pointers.
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// Don't call size() or oop_size() since that is a virtual call.
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int size = cm->object_size();
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return size;
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}
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int constMethodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
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assert (obj->is_constMethod(), "object must be constMethod");
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constMethodOop cm = constMethodOop(obj);
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oop* adr;
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adr = cm->adr_method();
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if (mr.contains(adr)) blk->do_oop(adr);
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adr = cm->adr_stackmap_data();
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if (mr.contains(adr)) blk->do_oop(adr);
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adr = cm->adr_exception_table();
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if (mr.contains(adr)) blk->do_oop(adr);
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// Get size before changing pointers.
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// Don't call size() or oop_size() since that is a virtual call.
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int size = cm->object_size();
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// Performance tweak: We skip iterating over the klass pointer since we
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// know that Universe::constMethodKlassObj never moves.
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return size;
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}
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int constMethodKlass::oop_adjust_pointers(oop obj) {
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assert(obj->is_constMethod(), "should be constMethod");
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constMethodOop cm = constMethodOop(obj);
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MarkSweep::adjust_pointer(cm->adr_method());
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MarkSweep::adjust_pointer(cm->adr_stackmap_data());
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MarkSweep::adjust_pointer(cm->adr_exception_table());
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// Get size before changing pointers.
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// Don't call size() or oop_size() since that is a virtual call.
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int size = cm->object_size();
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// Performance tweak: We skip iterating over the klass pointer since we
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// know that Universe::constMethodKlassObj never moves.
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return size;
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}
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#ifndef SERIALGC
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void constMethodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
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assert(obj->is_constMethod(), "should be constMethod");
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}
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int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
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assert(obj->is_constMethod(), "should be constMethod");
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constMethodOop cm_oop = constMethodOop(obj);
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oop* const beg_oop = cm_oop->oop_block_beg();
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oop* const end_oop = cm_oop->oop_block_end();
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for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
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PSParallelCompact::adjust_pointer(cur_oop);
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}
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return cm_oop->object_size();
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}
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#endif // SERIALGC
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// Printing
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void constMethodKlass::oop_print_on(oop obj, outputStream* st) {
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ResourceMark rm;
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assert(obj->is_constMethod(), "must be constMethod");
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Klass::oop_print_on(obj, st);
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constMethodOop m = constMethodOop(obj);
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st->print(" - method: " INTPTR_FORMAT " ", (address)m->method());
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m->method()->print_value_on(st); st->cr();
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st->print(" - exceptions: " INTPTR_FORMAT "\n", (address)m->exception_table());
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if (m->has_stackmap_table()) {
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st->print(" - stackmap data: ");
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m->stackmap_data()->print_value_on(st);
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st->cr();
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}
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}
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// Short version of printing constMethodOop - just print the name of the
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// method it belongs to.
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void constMethodKlass::oop_print_value_on(oop obj, outputStream* st) {
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assert(obj->is_constMethod(), "must be constMethod");
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constMethodOop m = constMethodOop(obj);
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st->print(" const part of method " );
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m->method()->print_value_on(st);
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}
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const char* constMethodKlass::internal_name() const {
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return "{constMethod}";
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}
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// Verification
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void constMethodKlass::oop_verify_on(oop obj, outputStream* st) {
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Klass::oop_verify_on(obj, st);
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guarantee(obj->is_constMethod(), "object must be constMethod");
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constMethodOop m = constMethodOop(obj);
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guarantee(m->is_perm(), "should be in permspace");
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// Verification can occur during oop construction before the method or
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// other fields have been initialized.
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if (!obj->partially_loaded()) {
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guarantee(m->method()->is_perm(), "should be in permspace");
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guarantee(m->method()->is_method(), "should be method");
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typeArrayOop stackmap_data = m->stackmap_data();
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guarantee(stackmap_data == NULL ||
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stackmap_data->is_perm(), "should be in permspace");
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guarantee(m->exception_table()->is_perm(), "should be in permspace");
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guarantee(m->exception_table()->is_typeArray(), "should be type array");
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address m_end = (address)((oop*) m + m->size());
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address compressed_table_start = m->code_end();
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guarantee(compressed_table_start <= m_end, "invalid method layout");
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address compressed_table_end = compressed_table_start;
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// Verify line number table
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if (m->has_linenumber_table()) {
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CompressedLineNumberReadStream stream(m->compressed_linenumber_table());
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while (stream.read_pair()) {
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guarantee(stream.bci() >= 0 && stream.bci() <= m->code_size(), "invalid bci in line number table");
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}
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compressed_table_end += stream.position();
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}
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guarantee(compressed_table_end <= m_end, "invalid method layout");
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// Verify checked exceptions and local variable tables
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if (m->has_checked_exceptions()) {
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u2* addr = m->checked_exceptions_length_addr();
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guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
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}
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if (m->has_localvariable_table()) {
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u2* addr = m->localvariable_table_length_addr();
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guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
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}
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// Check compressed_table_end relative to uncompressed_table_start
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u2* uncompressed_table_start;
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if (m->has_localvariable_table()) {
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uncompressed_table_start = (u2*) m->localvariable_table_start();
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} else {
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if (m->has_checked_exceptions()) {
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uncompressed_table_start = (u2*) m->checked_exceptions_start();
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} else {
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uncompressed_table_start = (u2*) m_end;
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}
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}
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int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end;
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int max_gap = align_object_size(1)*BytesPerWord;
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guarantee(gap >= 0 && gap < max_gap, "invalid method layout");
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}
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}
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bool constMethodKlass::oop_partially_loaded(oop obj) const {
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assert(obj->is_constMethod(), "object must be klass");
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constMethodOop m = constMethodOop(obj);
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// check whether exception_table points to self (flag for partially loaded)
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return m->exception_table() == (typeArrayOop)obj;
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}
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// The exception_table is the last field set when loading an object.
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void constMethodKlass::oop_set_partially_loaded(oop obj) {
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assert(obj->is_constMethod(), "object must be klass");
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constMethodOop m = constMethodOop(obj);
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// Temporarily set exception_table to point to self
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m->set_exception_table((typeArrayOop)obj);
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}
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