hotspot/src/share/vm/oops/constMethodKlass.cpp
author jrose
Fri, 08 Jan 2010 13:47:01 -0800
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child 5547 f4b087cbb361
permissions -rw-r--r--
6912062: disassembler plugin needs to produce symbolic information in product mode Summary: More informative disassembly in product mode. Also, a more consistent CompileCommand syntax. Reviewed-by: never
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/*
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 * Copyright 2003-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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# include "incls/_precompiled.incl"
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# include "incls/_constMethodKlass.cpp.incl"
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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_copy_contents(PSPromotionManager* pm, oop obj) {
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  assert(obj->is_constMethod(), "should be constMethod");
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}
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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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#if 0
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  PSParallelCompact::adjust_pointer(cm_oop->adr_method());
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  PSParallelCompact::adjust_pointer(cm_oop->adr_exception_table());
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  PSParallelCompact::adjust_pointer(cm_oop->adr_stackmap_data());
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#endif
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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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int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
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                                          HeapWord* beg_addr,
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                                          HeapWord* end_addr) {
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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 = MAX2((oop*)beg_addr, cm_oop->oop_block_beg());
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  oop* const end_oop = MIN2((oop*)end_addr, 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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#ifndef PRODUCT
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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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4584
e2a449e8cc6f 6912062: disassembler plugin needs to produce symbolic information in product mode
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#endif //PRODUCT
1
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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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}