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

 /*

  * Copyright (c) 1997, 2011, 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 "classfile/javaClasses.hpp"

 #include "gc_implementation/shared/markSweep.inline.hpp"

 #include "gc_interface/collectedHeap.inline.hpp"

 #include "interpreter/interpreter.hpp"

 #include "memory/gcLocker.hpp"

 #include "memory/resourceArea.hpp"

 #include "memory/universe.inline.hpp"

 #include "oops/constMethodKlass.hpp"

 #include "oops/klassOop.hpp"

 #include "oops/methodDataOop.hpp"

 #include "oops/methodKlass.hpp"

 #include "oops/oop.inline.hpp"

 #include "oops/oop.inline2.hpp"

 #include "oops/symbol.hpp"

 #include "runtime/handles.inline.hpp"

 klassOop methodKlass::create_klass(TRAPS) {

   methodKlass 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 methodKlass::oop_size(oop obj) const {

   assert(obj->is_method(), "must be method oop");

   return methodOop(obj)->object_size();

 }

 bool methodKlass::oop_is_parsable(oop obj) const {

   assert(obj->is_method(), "must be method oop");

   return methodOop(obj)->object_is_parsable();

 }

 methodOop methodKlass::allocate(constMethodHandle xconst,

                                 AccessFlags access_flags, TRAPS) {

   int size = methodOopDesc::object_size(access_flags.is_native());

   KlassHandle h_k(THREAD, as_klassOop());

   assert(xconst()->is_parsable(), "possible publication protocol violation");

   methodOop m = (methodOop)CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);

   assert(!m->is_parsable(), "not expecting parsability yet.");

   No_Safepoint_Verifier no_safepoint;  // until m becomes parsable below

   m->set_constMethod(xconst());

   m->set_access_flags(access_flags);

   m->set_method_size(size);

   m->set_name_index(0);

   m->set_signature_index(0);

 #ifdef CC_INTERP

   m->set_result_index(T_VOID);

 #endif

   m->set_constants(NULL);

   m->set_max_stack(0);

   m->set_max_locals(0);

   m->set_intrinsic_id(vmIntrinsics::_none);

   m->set_method_data(NULL);

   m->set_interpreter_throwout_count(0);

   m->set_vtable_index(methodOopDesc::garbage_vtable_index);

   // Fix and bury in methodOop

   m->set_interpreter_entry(NULL); // sets i2i entry and from_int

   m->set_adapter_entry(NULL);

   m->clear_code(); // from_c/from_i get set to c2i/i2i

   if (access_flags.is_native()) {

     m->clear_native_function();

     m->set_signature_handler(NULL);

   }

   NOT_PRODUCT(m->set_compiled_invocation_count(0);)

   m->set_interpreter_invocation_count(0);

   m->invocation_counter()->init();

   m->backedge_counter()->init();

   m->clear_number_of_breakpoints();

   assert(m->is_parsable(), "must be parsable here.");

   assert(m->size() == size, "wrong size for object");

   // We should not publish an uprasable object's reference

   // into one that is parsable, since that presents problems

   // for the concurrent parallel marking and precleaning phases

   // of concurrent gc (CMS).

   xconst->set_method(m);

   return m;

 }

 void methodKlass::oop_follow_contents(oop obj) {

   assert (obj->is_method(), "object must be method");

   methodOop m = methodOop(obj);

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::methodKlassObj never moves.

   MarkSweep::mark_and_push(m->adr_constMethod());

   MarkSweep::mark_and_push(m->adr_constants());

   if (m->method_data() != NULL) {

     MarkSweep::mark_and_push(m->adr_method_data());

   }

 }

 #ifndef SERIALGC

 void methodKlass::oop_follow_contents(ParCompactionManager* cm,

                                       oop obj) {

   assert (obj->is_method(), "object must be method");

   methodOop m = methodOop(obj);

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::methodKlassObj never moves.

   PSParallelCompact::mark_and_push(cm, m->adr_constMethod());

   PSParallelCompact::mark_and_push(cm, m->adr_constants());

 #ifdef COMPILER2

   if (m->method_data() != NULL) {

     PSParallelCompact::mark_and_push(cm, m->adr_method_data());

   }

 #endif // COMPILER2

 }

 #endif // SERIALGC

 int methodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {

   assert (obj->is_method(), "object must be method");

   methodOop m = methodOop(obj);

   // Get size before changing pointers.

   // Don't call size() or oop_size() since that is a virtual call.

   int size = m->object_size();

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::methodKlassObj never moves

   blk->do_oop(m->adr_constMethod());

   blk->do_oop(m->adr_constants());

   if (m->method_data() != NULL) {

     blk->do_oop(m->adr_method_data());

   }

   return size;

 }

 int methodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {

   assert (obj->is_method(), "object must be method");

   methodOop m = methodOop(obj);

   // Get size before changing pointers.

   // Don't call size() or oop_size() since that is a virtual call.

   int size = m->object_size();

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::methodKlassObj never moves.

   oop* adr;

   adr = m->adr_constMethod();

   if (mr.contains(adr)) blk->do_oop(adr);

   adr = m->adr_constants();

   if (mr.contains(adr)) blk->do_oop(adr);

   if (m->method_data() != NULL) {

     adr = m->adr_method_data();

     if (mr.contains(adr)) blk->do_oop(adr);

   }

   return size;

 }

 int methodKlass::oop_adjust_pointers(oop obj) {

   assert(obj->is_method(), "should be method");

   methodOop m = methodOop(obj);

   // Get size before changing pointers.

   // Don't call size() or oop_size() since that is a virtual call.

   int size = m->object_size();

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::methodKlassObj never moves.

   MarkSweep::adjust_pointer(m->adr_constMethod());

   MarkSweep::adjust_pointer(m->adr_constants());

   if (m->method_data() != NULL) {

     MarkSweep::adjust_pointer(m->adr_method_data());

   }

   return size;

 }

 #ifndef SERIALGC

 void methodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {

   assert(obj->is_method(), "should be method");

 }

 int methodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {

   assert(obj->is_method(), "should be method");

   methodOop m = methodOop(obj);

   PSParallelCompact::adjust_pointer(m->adr_constMethod());

   PSParallelCompact::adjust_pointer(m->adr_constants());

 #ifdef COMPILER2

   if (m->method_data() != NULL) {

     PSParallelCompact::adjust_pointer(m->adr_method_data());

   }

 #endif // COMPILER2

   return m->object_size();

 }

 #endif // SERIALGC

 #ifndef PRODUCT

 // Printing

 void methodKlass::oop_print_on(oop obj, outputStream* st) {

   ResourceMark rm;

   assert(obj->is_method(), "must be method");

   Klass::oop_print_on(obj, st);

   methodOop m = methodOop(obj);

   // get the effect of PrintOopAddress, always, for methods:

   st->print_cr(" - this oop:          "INTPTR_FORMAT, (intptr_t)m);

   st->print   (" - method holder:     ");    m->method_holder()->print_value_on(st); st->cr();

   st->print   (" - constants:         "INTPTR_FORMAT" ", (address)m->constants());

   m->constants()->print_value_on(st); st->cr();

   st->print   (" - access:            0x%x  ", m->access_flags().as_int()); m->access_flags().print_on(st); st->cr();

   st->print   (" - name:              ");    m->name()->print_value_on(st); st->cr();

   st->print   (" - signature:         ");    m->signature()->print_value_on(st); st->cr();

   st->print_cr(" - max stack:         %d",   m->max_stack());

   st->print_cr(" - max locals:        %d",   m->max_locals());

   st->print_cr(" - size of params:    %d",   m->size_of_parameters());

   st->print_cr(" - method size:       %d",   m->method_size());

   if (m->intrinsic_id() != vmIntrinsics::_none)

     st->print_cr(" - intrinsic id:      %d %s", m->intrinsic_id(), vmIntrinsics::name_at(m->intrinsic_id()));

   if (m->highest_comp_level() != CompLevel_none)

     st->print_cr(" - highest level:     %d", m->highest_comp_level());

   st->print_cr(" - vtable index:      %d",   m->_vtable_index);

   st->print_cr(" - i2i entry:         " INTPTR_FORMAT, m->interpreter_entry());

   st->print_cr(" - adapter:           " INTPTR_FORMAT, m->adapter());

   st->print_cr(" - compiled entry     " INTPTR_FORMAT, m->from_compiled_entry());

   st->print_cr(" - code size:         %d",   m->code_size());

   if (m->code_size() != 0) {

     st->print_cr(" - code start:        " INTPTR_FORMAT, m->code_base());

     st->print_cr(" - code end (excl):   " INTPTR_FORMAT, m->code_base() + m->code_size());

   }

   if (m->method_data() != NULL) {

     st->print_cr(" - method data:       " INTPTR_FORMAT, (address)m->method_data());

   }

   st->print_cr(" - checked ex length: %d",   m->checked_exceptions_length());

   if (m->checked_exceptions_length() > 0) {

     CheckedExceptionElement* table = m->checked_exceptions_start();

     st->print_cr(" - checked ex start:  " INTPTR_FORMAT, table);

     if (Verbose) {

       for (int i = 0; i < m->checked_exceptions_length(); i++) {

         st->print_cr("   - throws %s", m->constants()->printable_name_at(table[i].class_cp_index));

       }

     }

   }

   if (m->has_linenumber_table()) {

     u_char* table = m->compressed_linenumber_table();

     st->print_cr(" - linenumber start:  " INTPTR_FORMAT, table);

     if (Verbose) {

       CompressedLineNumberReadStream stream(table);

       while (stream.read_pair()) {

         st->print_cr("   - line %d: %d", stream.line(), stream.bci());

       }

     }

   }

   st->print_cr(" - localvar length:   %d",   m->localvariable_table_length());

   if (m->localvariable_table_length() > 0) {

     LocalVariableTableElement* table = m->localvariable_table_start();

     st->print_cr(" - localvar start:    " INTPTR_FORMAT, table);

     if (Verbose) {

       for (int i = 0; i < m->localvariable_table_length(); i++) {

         int bci = table[i].start_bci;

         int len = table[i].length;

         const char* name = m->constants()->printable_name_at(table[i].name_cp_index);

         const char* desc = m->constants()->printable_name_at(table[i].descriptor_cp_index);

         int slot = table[i].slot;

         st->print_cr("   - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot);

       }

     }

   }

   if (m->code() != NULL) {

     st->print   (" - compiled code: ");

     m->code()->print_value_on(st);

     st->cr();

   }

   if (m->is_method_handle_invoke()) {

     st->print_cr(" - invoke method type: " INTPTR_FORMAT, (address) m->method_handle_type());

     // m is classified as native, but it does not have an interesting

     // native_function or signature handler

   } else if (m->is_native()) {

     st->print_cr(" - native function:   " INTPTR_FORMAT, m->native_function());

     st->print_cr(" - signature handler: " INTPTR_FORMAT, m->signature_handler());

   }

 }

 #endif //PRODUCT

 void methodKlass::oop_print_value_on(oop obj, outputStream* st) {

   assert(obj->is_method(), "must be method");

   Klass::oop_print_value_on(obj, st);

   methodOop m = methodOop(obj);

   st->print(" ");

   m->name()->print_value_on(st);

   st->print(" ");

   m->signature()->print_value_on(st);

   st->print(" in ");

   m->method_holder()->print_value_on(st);

   if (WizardMode) st->print("[%d,%d]", m->size_of_parameters(), m->max_locals());

   if (WizardMode && m->code() != NULL) st->print(" ((nmethod*)%p)", m->code());

 }

 const char* methodKlass::internal_name() const {

   return "{method}";

 }

 // Verification

 void methodKlass::oop_verify_on(oop obj, outputStream* st) {

   Klass::oop_verify_on(obj, st);

   guarantee(obj->is_method(), "object must be method");

   if (!obj->partially_loaded()) {

     methodOop m = methodOop(obj);

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

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

     guarantee(m->constants()->is_constantPool(), "should be constant pool");

     guarantee(m->constMethod()->is_constMethod(), "should be constMethodOop");

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

     methodDataOop method_data = m->method_data();

     guarantee(method_data == NULL ||

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

     guarantee(method_data == NULL ||

               method_data->is_methodData(), "should be method data");

   }

 }

 bool methodKlass::oop_partially_loaded(oop obj) const {

   assert(obj->is_method(), "object must be method");

   methodOop m = methodOop(obj);

   constMethodOop xconst = m->constMethod();

   assert(xconst != NULL, "const method must be set");

   constMethodKlass* ck = constMethodKlass::cast(xconst->klass());

   return ck->oop_partially_loaded(xconst);

 }

 void methodKlass::oop_set_partially_loaded(oop obj) {

   assert(obj->is_method(), "object must be method");

   methodOop m = methodOop(obj);

   constMethodOop xconst = m->constMethod();

   assert(xconst != NULL, "const method must be set");

   constMethodKlass* ck = constMethodKlass::cast(xconst->klass());

   ck->oop_set_partially_loaded(xconst);

 }