jdk8-mips64-public/hotspot: src/share/vm/oops/constMethodKlass.cpp@2fe087c3e814 (annotated)

src/share/vm/oops/constMethodKlass.cpp@2fe087c3e814 (annotated)

src/share/vm/oops/constMethodKlass.cpp

Wed, 06 Jun 2012 14:33:43 -0400

author: jiangli
date: Wed, 06 Jun 2012 14:33:43 -0400
changeset 3826: 2fe087c3e814
parent 3099: c124e2e7463e
child 3917: 8150fa46d2ed
permissions: -rw-r--r--

7172967: Eliminate constMethod's _method backpointer to methodOop.
Summary: Eliminate constMethod's _method backpointer to methodOop, and move the _constant field from methodOop to constMethod.
Reviewed-by: roland, bdelsart, kamg

 /*
  * Copyright (c) 2003, 2012, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "gc_implementation/shared/markSweep.inline.hpp"
 #include "interpreter/interpreter.hpp"
 #include "memory/gcLocker.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/constMethodKlass.hpp"
 #include "oops/constMethodOop.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/oop.inline2.hpp"
 #include "runtime/handles.inline.hpp"
 klassOop constMethodKlass::create_klass(TRAPS) {
   constMethodKlass o;
   KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
   KlassHandle k = base_create_klass(h_this_klass, header_size(),
                                     o.vtbl_value(), CHECK_NULL);
   // Make sure size calculation is right
   assert(k()->size() == align_object_size(header_size()),
          "wrong size for object");
   //java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
   return k();
 }
 int constMethodKlass::oop_size(oop obj) const {
   assert(obj->is_constMethod(), "must be constMethod oop");
   return constMethodOop(obj)->object_size();
 }
 bool constMethodKlass::oop_is_parsable(oop obj) const {
   assert(obj->is_constMethod(), "must be constMethod oop");
   return constMethodOop(obj)->object_is_parsable();
 }
 bool constMethodKlass::oop_is_conc_safe(oop obj) const {
   assert(obj->is_constMethod(), "must be constMethod oop");
   return constMethodOop(obj)->is_conc_safe();
 }
 constMethodOop constMethodKlass::allocate(int byte_code_size,
                                           int compressed_line_number_size,
                                           int localvariable_table_length,
                                           int checked_exceptions_length,
                                           bool is_conc_safe,
                                           TRAPS) {
   int size = constMethodOopDesc::object_size(byte_code_size,
                                              compressed_line_number_size,
                                              localvariable_table_length,
                                              checked_exceptions_length);
   KlassHandle h_k(THREAD, as_klassOop());
   constMethodOop cm = (constMethodOop)
     CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);
   assert(!cm->is_parsable(), "Not yet safely parsable");
   No_Safepoint_Verifier no_safepoint;
   cm->set_interpreter_kind(Interpreter::invalid);
   cm->init_fingerprint();
   cm->set_constants(NULL);
   cm->set_stackmap_data(NULL);
   cm->set_exception_table(NULL);
   cm->set_code_size(byte_code_size);
   cm->set_constMethod_size(size);
   cm->set_inlined_tables_length(checked_exceptions_length,
                                 compressed_line_number_size,
                                 localvariable_table_length);
   assert(cm->size() == size, "wrong size for object");
   cm->set_is_conc_safe(is_conc_safe);
   cm->set_partially_loaded();
   assert(cm->is_parsable(), "Is safely parsable by gc");
   return cm;
 }
 void constMethodKlass::oop_follow_contents(oop obj) {
   assert (obj->is_constMethod(), "object must be constMethod");
   constMethodOop cm = constMethodOop(obj);
   MarkSweep::mark_and_push(cm->adr_constants());
   MarkSweep::mark_and_push(cm->adr_stackmap_data());
   MarkSweep::mark_and_push(cm->adr_exception_table());
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::constMethodKlassObj never moves.
 }
 #ifndef SERIALGC
 void constMethodKlass::oop_follow_contents(ParCompactionManager* cm,
                                            oop obj) {
   assert (obj->is_constMethod(), "object must be constMethod");
   constMethodOop cm_oop = constMethodOop(obj);
   PSParallelCompact::mark_and_push(cm, cm_oop->adr_constants());
   PSParallelCompact::mark_and_push(cm, cm_oop->adr_stackmap_data());
   PSParallelCompact::mark_and_push(cm, cm_oop->adr_exception_table());
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::constMethodKlassObj never moves.
 }
 #endif // SERIALGC
 int constMethodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
   assert (obj->is_constMethod(), "object must be constMethod");
   constMethodOop cm = constMethodOop(obj);
   blk->do_oop(cm->adr_constants());
   blk->do_oop(cm->adr_stackmap_data());
   blk->do_oop(cm->adr_exception_table());
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = cm->object_size();
   return size;
 }
 int constMethodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
   assert (obj->is_constMethod(), "object must be constMethod");
   constMethodOop cm = constMethodOop(obj);
   oop* adr;
   adr = cm->adr_constants();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = cm->adr_stackmap_data();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = cm->adr_exception_table();
   if (mr.contains(adr)) blk->do_oop(adr);
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = cm->object_size();
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::constMethodKlassObj never moves.
   return size;
 }
 int constMethodKlass::oop_adjust_pointers(oop obj) {
   assert(obj->is_constMethod(), "should be constMethod");
   constMethodOop cm = constMethodOop(obj);
   MarkSweep::adjust_pointer(cm->adr_constants());
   MarkSweep::adjust_pointer(cm->adr_stackmap_data());
   MarkSweep::adjust_pointer(cm->adr_exception_table());
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = cm->object_size();
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::constMethodKlassObj never moves.
   return size;
 }
 #ifndef SERIALGC
 void constMethodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
   assert(obj->is_constMethod(), "should be constMethod");
 }
 int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   assert(obj->is_constMethod(), "should be constMethod");
   constMethodOop cm_oop = constMethodOop(obj);
   oop* const beg_oop = cm_oop->oop_block_beg();
   oop* const end_oop = cm_oop->oop_block_end();
   for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
     PSParallelCompact::adjust_pointer(cur_oop);
   }
   return cm_oop->object_size();
 }
 #endif // SERIALGC
 // Printing
 void constMethodKlass::oop_print_on(oop obj, outputStream* st) {
   ResourceMark rm;
   assert(obj->is_constMethod(), "must be constMethod");
   Klass::oop_print_on(obj, st);
   constMethodOop m = constMethodOop(obj);
   st->print(" - constants:       " INTPTR_FORMAT " ", (address)m->constants());
   m->constants()->print_value_on(st); st->cr();
   st->print(" - exceptions:   " INTPTR_FORMAT "\n", (address)m->exception_table());
   if (m->has_stackmap_table()) {
     st->print(" - stackmap data:       ");
     m->stackmap_data()->print_value_on(st);
     st->cr();
   }
 }
 // Short version of printing constMethodOop - just print the name of the
 // method it belongs to.
 void constMethodKlass::oop_print_value_on(oop obj, outputStream* st) {
   assert(obj->is_constMethod(), "must be constMethod");
   constMethodOop m = constMethodOop(obj);
   st->print(" const part of method " );
   m->method()->print_value_on(st);
 }
 const char* constMethodKlass::internal_name() const {
   return "{constMethod}";
 }
 // Verification
 void constMethodKlass::oop_verify_on(oop obj, outputStream* st) {
   Klass::oop_verify_on(obj, st);
   guarantee(obj->is_constMethod(), "object must be constMethod");
   constMethodOop m = constMethodOop(obj);
   guarantee(m->is_perm(),                            "should be in permspace");
   // Verification can occur during oop construction before the method or
   // other fields have been initialized.
   if (!obj->partially_loaded()) {
     guarantee(m->constants()->is_perm(), "should be in permspace");
     guarantee(m->constants()->is_constantPool(), "should be constant pool");
     typeArrayOop stackmap_data = m->stackmap_data();
     guarantee(stackmap_data == NULL ||
               stackmap_data->is_perm(),  "should be in permspace");
     guarantee(m->exception_table()->is_perm(), "should be in permspace");
     guarantee(m->exception_table()->is_typeArray(), "should be type array");
     address m_end = (address)((oop*) m + m->size());
     address compressed_table_start = m->code_end();
     guarantee(compressed_table_start <= m_end, "invalid method layout");
     address compressed_table_end = compressed_table_start;
     // Verify line number table
     if (m->has_linenumber_table()) {
       CompressedLineNumberReadStream stream(m->compressed_linenumber_table());
       while (stream.read_pair()) {
         guarantee(stream.bci() >= 0 && stream.bci() <= m->code_size(), "invalid bci in line number table");
       }
       compressed_table_end += stream.position();
     }
     guarantee(compressed_table_end <= m_end, "invalid method layout");
     // Verify checked exceptions and local variable tables
     if (m->has_checked_exceptions()) {
       u2* addr = m->checked_exceptions_length_addr();
       guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
     }
     if (m->has_localvariable_table()) {
       u2* addr = m->localvariable_table_length_addr();
       guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
     }
     // Check compressed_table_end relative to uncompressed_table_start
     u2* uncompressed_table_start;
     if (m->has_localvariable_table()) {
       uncompressed_table_start = (u2*) m->localvariable_table_start();
     } else {
       if (m->has_checked_exceptions()) {
         uncompressed_table_start = (u2*) m->checked_exceptions_start();
       } else {
         uncompressed_table_start = (u2*) m_end;
       }
     }
     int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end;
     int max_gap = align_object_size(1)*BytesPerWord;
     guarantee(gap >= 0 && gap < max_gap, "invalid method layout");
   }
 }
 bool constMethodKlass::oop_partially_loaded(oop obj) const {
   assert(obj->is_constMethod(), "object must be klass");
   constMethodOop m = constMethodOop(obj);
   // check whether exception_table points to self (flag for partially loaded)
   return m->exception_table() == (typeArrayOop)obj;
 }
 // The exception_table is the last field set when loading an object.
 void constMethodKlass::oop_set_partially_loaded(oop obj) {
   assert(obj->is_constMethod(), "object must be klass");
   constMethodOop m = constMethodOop(obj);
   // Temporarily set exception_table to point to self
   m->set_exception_table((typeArrayOop)obj);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/constMethodKlass.cpp@2fe087c3e814 (annotated)

src/share/vm/oops/constMethodKlass.cpp