Mercurial > hg > graal-compiler
view src/share/vm/code/debugInfo.cpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
author | johnc |
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date | Wed, 12 Oct 2011 10:25:51 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
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/* * Copyright (c) 1997, 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 "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)); } 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 klass 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) { 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()); } 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