| /* |
| * Copyright (c) 1997, 2016, 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/debugInfoRec.hpp" |
| #include "code/pcDesc.hpp" |
| #include "code/scopeDesc.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/handles.inline.hpp" |
| |
| ScopeDesc::ScopeDesc(const CompiledMethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool rethrow_exception, bool return_oop) { |
| _code = code; |
| _decode_offset = decode_offset; |
| _objects = decode_object_values(obj_decode_offset); |
| _reexecute = reexecute; |
| _rethrow_exception = rethrow_exception; |
| _return_oop = return_oop; |
| decode_body(); |
| } |
| |
| ScopeDesc::ScopeDesc(const CompiledMethod* code, int decode_offset, bool reexecute, bool rethrow_exception, bool return_oop) { |
| _code = code; |
| _decode_offset = decode_offset; |
| _objects = decode_object_values(DebugInformationRecorder::serialized_null); |
| _reexecute = reexecute; |
| _rethrow_exception = rethrow_exception; |
| _return_oop = return_oop; |
| decode_body(); |
| } |
| |
| |
| ScopeDesc::ScopeDesc(const ScopeDesc* parent) { |
| _code = parent->_code; |
| _decode_offset = parent->_sender_decode_offset; |
| _objects = parent->_objects; |
| _reexecute = false; //reexecute only applies to the first scope |
| _rethrow_exception = false; |
| _return_oop = false; |
| decode_body(); |
| } |
| |
| |
| void ScopeDesc::decode_body() { |
| if (decode_offset() == DebugInformationRecorder::serialized_null) { |
| // This is a sentinel record, which is only relevant to |
| // approximate queries. Decode a reasonable frame. |
| _sender_decode_offset = DebugInformationRecorder::serialized_null; |
| _method = _code->method(); |
| _bci = InvocationEntryBci; |
| _locals_decode_offset = DebugInformationRecorder::serialized_null; |
| _expressions_decode_offset = DebugInformationRecorder::serialized_null; |
| _monitors_decode_offset = DebugInformationRecorder::serialized_null; |
| } else { |
| // decode header |
| DebugInfoReadStream* stream = stream_at(decode_offset()); |
| |
| _sender_decode_offset = stream->read_int(); |
| _method = stream->read_method(); |
| _bci = stream->read_bci(); |
| |
| // decode offsets for body and sender |
| _locals_decode_offset = stream->read_int(); |
| _expressions_decode_offset = stream->read_int(); |
| _monitors_decode_offset = stream->read_int(); |
| } |
| } |
| |
| |
| GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) { |
| if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
| DebugInfoReadStream* stream = stream_at(decode_offset); |
| int length = stream->read_int(); |
| GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length); |
| for (int index = 0; index < length; index++) { |
| result->push(ScopeValue::read_from(stream)); |
| } |
| return result; |
| } |
| |
| GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) { |
| if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
| GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>(); |
| DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result); |
| int length = stream->read_int(); |
| for (int index = 0; index < length; index++) { |
| // Objects values are pushed to 'result' array during read so that |
| // object's fields could reference it (OBJECT_ID_CODE). |
| (void)ScopeValue::read_from(stream); |
| } |
| assert(result->length() == length, "inconsistent debug information"); |
| return result; |
| } |
| |
| |
| GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) { |
| if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
| DebugInfoReadStream* stream = stream_at(decode_offset); |
| int length = stream->read_int(); |
| GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length); |
| for (int index = 0; index < length; index++) { |
| result->push(new MonitorValue(stream)); |
| } |
| return result; |
| } |
| |
| DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const { |
| return new DebugInfoReadStream(_code, decode_offset, _objects); |
| } |
| |
| GrowableArray<ScopeValue*>* ScopeDesc::locals() { |
| return decode_scope_values(_locals_decode_offset); |
| } |
| |
| GrowableArray<ScopeValue*>* ScopeDesc::expressions() { |
| return decode_scope_values(_expressions_decode_offset); |
| } |
| |
| GrowableArray<MonitorValue*>* ScopeDesc::monitors() { |
| return decode_monitor_values(_monitors_decode_offset); |
| } |
| |
| GrowableArray<ScopeValue*>* ScopeDesc::objects() { |
| return _objects; |
| } |
| |
| bool ScopeDesc::is_top() const { |
| return _sender_decode_offset == DebugInformationRecorder::serialized_null; |
| } |
| |
| ScopeDesc* ScopeDesc::sender() const { |
| if (is_top()) return NULL; |
| return new ScopeDesc(this); |
| } |
| |
| |
| #ifndef PRODUCT |
| |
| void ScopeDesc::print_value_on(outputStream* st) const { |
| st->print(" "); |
| method()->print_short_name(st); |
| int lineno = method()->line_number_from_bci(bci()); |
| if (lineno != -1) { |
| st->print("@%d (line %d)", bci(), lineno); |
| } else { |
| st->print("@%d", bci()); |
| } |
| if (should_reexecute()) { |
| st->print(" reexecute=true"); |
| } |
| st->cr(); |
| } |
| |
| void ScopeDesc::print_on(outputStream* st) const { |
| print_on(st, NULL); |
| } |
| |
| void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const { |
| // header |
| if (pd != NULL) { |
| st->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", p2i(pd->real_pc(_code)), pd->pc_offset()); |
| } |
| |
| print_value_on(st); |
| // decode offsets |
| if (WizardMode) { |
| st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, p2i(_code->content_begin())); |
| st->print_cr(" offset: %d", _decode_offset); |
| st->print_cr(" bci: %d", bci()); |
| st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false"); |
| st->print_cr(" locals: %d", _locals_decode_offset); |
| st->print_cr(" stack: %d", _expressions_decode_offset); |
| st->print_cr(" monitor: %d", _monitors_decode_offset); |
| st->print_cr(" sender: %d", _sender_decode_offset); |
| } |
| // locals |
| { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals(); |
| if (l != NULL) { |
| st->print_cr(" Locals"); |
| for (int index = 0; index < l->length(); index++) { |
| st->print(" - l%d: ", index); |
| l->at(index)->print_on(st); |
| st->cr(); |
| } |
| } |
| } |
| // expressions |
| { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions(); |
| if (l != NULL) { |
| st->print_cr(" Expression stack"); |
| for (int index = 0; index < l->length(); index++) { |
| st->print(" - @%d: ", index); |
| l->at(index)->print_on(st); |
| st->cr(); |
| } |
| } |
| } |
| // monitors |
| { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors(); |
| if (l != NULL) { |
| st->print_cr(" Monitor stack"); |
| for (int index = 0; index < l->length(); index++) { |
| st->print(" - @%d: ", index); |
| l->at(index)->print_on(st); |
| st->cr(); |
| } |
| } |
| } |
| |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| if (NOT_JVMCI(DoEscapeAnalysis &&) is_top() && _objects != NULL) { |
| st->print_cr(" Objects"); |
| for (int i = 0; i < _objects->length(); i++) { |
| ObjectValue* sv = (ObjectValue*) _objects->at(i); |
| st->print(" - %d: ", sv->id()); |
| st->print("%s ", java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())->external_name()); |
| sv->print_fields_on(st); |
| st->cr(); |
| } |
| } |
| #endif // COMPILER2 || INCLUDE_JVMCI |
| } |
| |
| #endif |
| |
| void ScopeDesc::verify() { |
| ResourceMark rm; |
| guarantee(method()->is_method(), "type check"); |
| |
| // check if we have any illegal elements on the expression stack |
| { GrowableArray<ScopeValue*>* l = expressions(); |
| if (l != NULL) { |
| for (int index = 0; index < l->length(); index++) { |
| //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal"); |
| } |
| } |
| } |
| } |