Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2003, 2010, 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_method(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_method());

   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_method());

   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_method());

   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_method();

   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_method());

   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);

 #if 0

   PSParallelCompact::adjust_pointer(cm_oop->adr_method());

   PSParallelCompact::adjust_pointer(cm_oop->adr_exception_table());

   PSParallelCompact::adjust_pointer(cm_oop->adr_stackmap_data());

 #endif

   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();

 }

 int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,

                                           HeapWord* beg_addr,

                                           HeapWord* end_addr) {

   assert(obj->is_constMethod(), "should be constMethod");

   constMethodOop cm_oop = constMethodOop(obj);

   oop* const beg_oop = MAX2((oop*)beg_addr, cm_oop->oop_block_beg());

   oop* const end_oop = MIN2((oop*)end_addr, 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(" - method:       " INTPTR_FORMAT " ", (address)m->method());

   m->method()->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->method()->is_perm(), "should be in permspace");

     guarantee(m->method()->is_method(), "should be method");

     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);

 }