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

 /*

  * Copyright (c) 1997, 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 "code/debugInfo.hpp"

 #include "code/debugInfoRec.hpp"

 #include "code/nmethod.hpp"

 #include "runtime/handles.inline.hpp"

 // Comstructors

 DebugInfoWriteStream::DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size)

 : CompressedWriteStream(initial_size) {

   _recorder = recorder;

 }

 // Serializing oops

 void DebugInfoWriteStream::write_handle(jobject h) {

   write_int(recorder()->oop_recorder()->find_index(h));

 }

 void DebugInfoWriteStream::write_metadata(Metadata* h) {

   write_int(recorder()->oop_recorder()->find_index(h));

 }

 ScopeValue* DebugInfoReadStream::read_object_value() {

   int id = read_int();

 #ifdef ASSERT

   assert(_obj_pool != NULL, "object pool does not exist");

   for (int i = _obj_pool->length() - 1; i >= 0; i--) {

     assert(((ObjectValue*) _obj_pool->at(i))->id() != id, "should not be read twice");

   }

 #endif

   ObjectValue* result = new ObjectValue(id);

   // Cache the object since an object field could reference it.

   _obj_pool->push(result);

   result->read_object(this);

   return result;

 }

 ScopeValue* DebugInfoReadStream::get_cached_object() {

   int id = read_int();

   assert(_obj_pool != NULL, "object pool does not exist");

   for (int i = _obj_pool->length() - 1; i >= 0; i--) {

     ObjectValue* ov = (ObjectValue*) _obj_pool->at(i);

     if (ov->id() == id) {

       return ov;

     }

   }

   ShouldNotReachHere();

   return NULL;

 }

 // Serializing scope values

 enum { LOCATION_CODE = 0, CONSTANT_INT_CODE = 1,  CONSTANT_OOP_CODE = 2,

                           CONSTANT_LONG_CODE = 3, CONSTANT_DOUBLE_CODE = 4,

                           OBJECT_CODE = 5,        OBJECT_ID_CODE = 6 };

 ScopeValue* ScopeValue::read_from(DebugInfoReadStream* stream) {

   ScopeValue* result = NULL;

   switch(stream->read_int()) {

    case LOCATION_CODE:        result = new LocationValue(stream);        break;

    case CONSTANT_INT_CODE:    result = new ConstantIntValue(stream);     break;

    case CONSTANT_OOP_CODE:    result = new ConstantOopReadValue(stream); break;

    case CONSTANT_LONG_CODE:   result = new ConstantLongValue(stream);    break;

    case CONSTANT_DOUBLE_CODE: result = new ConstantDoubleValue(stream);  break;

    case OBJECT_CODE:          result = stream->read_object_value();      break;

    case OBJECT_ID_CODE:       result = stream->get_cached_object();      break;

    default: ShouldNotReachHere();

   }

   return result;

 }

 // LocationValue

 LocationValue::LocationValue(DebugInfoReadStream* stream) {

   _location = Location(stream);

 }

 void LocationValue::write_on(DebugInfoWriteStream* stream) {

   stream->write_int(LOCATION_CODE);

   location().write_on(stream);

 }

 void LocationValue::print_on(outputStream* st) const {

   location().print_on(st);

 }

 // ObjectValue

 void ObjectValue::read_object(DebugInfoReadStream* stream) {

   _klass = read_from(stream);

   assert(_klass->is_constant_oop(), "should be constant java mirror oop");

   int length = stream->read_int();

   for (int i = 0; i < length; i++) {

     ScopeValue* val = read_from(stream);

     _field_values.append(val);

   }

 }

 void ObjectValue::write_on(DebugInfoWriteStream* stream) {

   if (_visited) {

     stream->write_int(OBJECT_ID_CODE);

     stream->write_int(_id);

   } else {

     _visited = true;

     stream->write_int(OBJECT_CODE);

     stream->write_int(_id);

     _klass->write_on(stream);

     int length = _field_values.length();

     stream->write_int(length);

     for (int i = 0; i < length; i++) {

       _field_values.at(i)->write_on(stream);

     }

   }

 }

 void ObjectValue::print_on(outputStream* st) const {

   st->print("obj[%d]", _id);

 }

 void ObjectValue::print_fields_on(outputStream* st) const {

 #ifndef PRODUCT

   if (_field_values.length() > 0) {

     _field_values.at(0)->print_on(st);

   }

   for (int i = 1; i < _field_values.length(); i++) {

     st->print(", ");

     _field_values.at(i)->print_on(st);

   }

 #endif

 }

 // ConstantIntValue

 ConstantIntValue::ConstantIntValue(DebugInfoReadStream* stream) {

   _value = stream->read_signed_int();

 }

 void ConstantIntValue::write_on(DebugInfoWriteStream* stream) {

   stream->write_int(CONSTANT_INT_CODE);

   stream->write_signed_int(value());

 }

 void ConstantIntValue::print_on(outputStream* st) const {

   st->print("%d", value());

 }

 // ConstantLongValue

 ConstantLongValue::ConstantLongValue(DebugInfoReadStream* stream) {

   _value = stream->read_long();

 }

 void ConstantLongValue::write_on(DebugInfoWriteStream* stream) {

   stream->write_int(CONSTANT_LONG_CODE);

   stream->write_long(value());

 }

 void ConstantLongValue::print_on(outputStream* st) const {

   st->print(INT64_FORMAT, value());

 }

 // ConstantDoubleValue

 ConstantDoubleValue::ConstantDoubleValue(DebugInfoReadStream* stream) {

   _value = stream->read_double();

 }

 void ConstantDoubleValue::write_on(DebugInfoWriteStream* stream) {

   stream->write_int(CONSTANT_DOUBLE_CODE);

   stream->write_double(value());

 }

 void ConstantDoubleValue::print_on(outputStream* st) const {

   st->print("%f", value());

 }

 // ConstantOopWriteValue

 void ConstantOopWriteValue::write_on(DebugInfoWriteStream* stream) {

   assert(JNIHandles::resolve(value()) == NULL ||

          Universe::heap()->is_in_reserved(JNIHandles::resolve(value())),

          "Should be in heap");

   stream->write_int(CONSTANT_OOP_CODE);

   stream->write_handle(value());

 }

 void ConstantOopWriteValue::print_on(outputStream* st) const {

   JNIHandles::resolve(value())->print_value_on(st);

 }

 // ConstantOopReadValue

 ConstantOopReadValue::ConstantOopReadValue(DebugInfoReadStream* stream) {

   _value = Handle(stream->read_oop());

   assert(_value() == NULL ||

          Universe::heap()->is_in_reserved(_value()), "Should be in heap");

 }

 void ConstantOopReadValue::write_on(DebugInfoWriteStream* stream) {

   ShouldNotReachHere();

 }

 void ConstantOopReadValue::print_on(outputStream* st) const {

   value()()->print_value_on(st);

 }

 // MonitorValue

 MonitorValue::MonitorValue(ScopeValue* owner, Location basic_lock, bool eliminated) {

   _owner       = owner;

   _basic_lock  = basic_lock;

   _eliminated  = eliminated;

 }

 MonitorValue::MonitorValue(DebugInfoReadStream* stream) {

   _basic_lock  = Location(stream);

   _owner       = ScopeValue::read_from(stream);

   _eliminated  = (stream->read_bool() != 0);

 }

 void MonitorValue::write_on(DebugInfoWriteStream* stream) {

   _basic_lock.write_on(stream);

   _owner->write_on(stream);

   stream->write_bool(_eliminated);

 }

 #ifndef PRODUCT

 void MonitorValue::print_on(outputStream* st) const {

   st->print("monitor{");

   owner()->print_on(st);

   st->print(",");

   basic_lock().print_on(st);

   st->print("}");

   if (_eliminated) {

     st->print(" (eliminated)");

   }

 }

 #endif