1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/code/scopeDesc.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,237 @@
1.4 +/*
1.5 + * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +# include "incls/_precompiled.incl"
1.29 +# include "incls/_scopeDesc.cpp.incl"
1.30 +
1.31 +
1.32 +ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset) {
1.33 + _code = code;
1.34 + _decode_offset = decode_offset;
1.35 + _objects = decode_object_values(obj_decode_offset);
1.36 + decode_body();
1.37 +}
1.38 +
1.39 +ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset) {
1.40 + _code = code;
1.41 + _decode_offset = decode_offset;
1.42 + _objects = decode_object_values(DebugInformationRecorder::serialized_null);
1.43 + decode_body();
1.44 +}
1.45 +
1.46 +
1.47 +ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
1.48 + _code = parent->_code;
1.49 + _decode_offset = parent->_sender_decode_offset;
1.50 + _objects = parent->_objects;
1.51 + decode_body();
1.52 +}
1.53 +
1.54 +
1.55 +void ScopeDesc::decode_body() {
1.56 + if (decode_offset() == DebugInformationRecorder::serialized_null) {
1.57 + // This is a sentinel record, which is only relevant to
1.58 + // approximate queries. Decode a reasonable frame.
1.59 + _sender_decode_offset = DebugInformationRecorder::serialized_null;
1.60 + _method = methodHandle(_code->method());
1.61 + _bci = InvocationEntryBci;
1.62 + _locals_decode_offset = DebugInformationRecorder::serialized_null;
1.63 + _expressions_decode_offset = DebugInformationRecorder::serialized_null;
1.64 + _monitors_decode_offset = DebugInformationRecorder::serialized_null;
1.65 + } else {
1.66 + // decode header
1.67 + DebugInfoReadStream* stream = stream_at(decode_offset());
1.68 +
1.69 + _sender_decode_offset = stream->read_int();
1.70 + _method = methodHandle((methodOop) stream->read_oop());
1.71 + _bci = stream->read_bci();
1.72 + // decode offsets for body and sender
1.73 + _locals_decode_offset = stream->read_int();
1.74 + _expressions_decode_offset = stream->read_int();
1.75 + _monitors_decode_offset = stream->read_int();
1.76 + }
1.77 +}
1.78 +
1.79 +
1.80 +GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) {
1.81 + if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
1.82 + DebugInfoReadStream* stream = stream_at(decode_offset);
1.83 + int length = stream->read_int();
1.84 + GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length);
1.85 + for (int index = 0; index < length; index++) {
1.86 + result->push(ScopeValue::read_from(stream));
1.87 + }
1.88 + return result;
1.89 +}
1.90 +
1.91 +GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) {
1.92 + if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
1.93 + GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>();
1.94 + DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result);
1.95 + int length = stream->read_int();
1.96 + for (int index = 0; index < length; index++) {
1.97 + result->push(ScopeValue::read_from(stream));
1.98 + }
1.99 + assert(result->length() == length, "inconsistent debug information");
1.100 + return result;
1.101 +}
1.102 +
1.103 +
1.104 +GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
1.105 + if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
1.106 + DebugInfoReadStream* stream = stream_at(decode_offset);
1.107 + int length = stream->read_int();
1.108 + GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
1.109 + for (int index = 0; index < length; index++) {
1.110 + result->push(new MonitorValue(stream));
1.111 + }
1.112 + return result;
1.113 +}
1.114 +
1.115 +DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
1.116 + return new DebugInfoReadStream(_code, decode_offset, _objects);
1.117 +}
1.118 +
1.119 +GrowableArray<ScopeValue*>* ScopeDesc::locals() {
1.120 + return decode_scope_values(_locals_decode_offset);
1.121 +}
1.122 +
1.123 +GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
1.124 + return decode_scope_values(_expressions_decode_offset);
1.125 +}
1.126 +
1.127 +GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
1.128 + return decode_monitor_values(_monitors_decode_offset);
1.129 +}
1.130 +
1.131 +GrowableArray<ScopeValue*>* ScopeDesc::objects() {
1.132 + return _objects;
1.133 +}
1.134 +
1.135 +bool ScopeDesc::is_top() const {
1.136 + return _sender_decode_offset == DebugInformationRecorder::serialized_null;
1.137 +}
1.138 +
1.139 +ScopeDesc* ScopeDesc::sender() const {
1.140 + if (is_top()) return NULL;
1.141 + return new ScopeDesc(this);
1.142 +}
1.143 +
1.144 +
1.145 +#ifndef PRODUCT
1.146 +
1.147 +void ScopeDesc::print_value_on(outputStream* st) const {
1.148 + tty->print(" ");
1.149 + method()()->print_short_name(st);
1.150 + int lineno = method()->line_number_from_bci(bci());
1.151 + if (lineno != -1) {
1.152 + st->print_cr("@%d (line %d)", bci(), lineno);
1.153 + } else {
1.154 + st->print_cr("@%d", bci());
1.155 + }
1.156 +}
1.157 +
1.158 +void ScopeDesc::print_on(outputStream* st) const {
1.159 + print_on(st, NULL);
1.160 +}
1.161 +
1.162 +void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
1.163 + // header
1.164 + if (pd != NULL) {
1.165 + tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
1.166 + }
1.167 +
1.168 + print_value_on(st);
1.169 + // decode offsets
1.170 + if (WizardMode) {
1.171 + st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
1.172 + st->print_cr(" offset: %d", _decode_offset);
1.173 + st->print_cr(" bci: %d", bci());
1.174 + st->print_cr(" locals: %d", _locals_decode_offset);
1.175 + st->print_cr(" stack: %d", _expressions_decode_offset);
1.176 + st->print_cr(" monitor: %d", _monitors_decode_offset);
1.177 + st->print_cr(" sender: %d", _sender_decode_offset);
1.178 + }
1.179 + // locals
1.180 + { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
1.181 + if (l != NULL) {
1.182 + tty->print_cr(" Locals");
1.183 + for (int index = 0; index < l->length(); index++) {
1.184 + st->print(" - l%d: ", index);
1.185 + l->at(index)->print_on(st);
1.186 + st->cr();
1.187 + }
1.188 + }
1.189 + }
1.190 + // expressions
1.191 + { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
1.192 + if (l != NULL) {
1.193 + st->print_cr(" Expression stack");
1.194 + for (int index = 0; index < l->length(); index++) {
1.195 + st->print(" - @%d: ", index);
1.196 + l->at(index)->print_on(st);
1.197 + st->cr();
1.198 + }
1.199 + }
1.200 + }
1.201 + // monitors
1.202 + { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
1.203 + if (l != NULL) {
1.204 + st->print_cr(" Monitor stack");
1.205 + for (int index = 0; index < l->length(); index++) {
1.206 + st->print(" - @%d: ", index);
1.207 + l->at(index)->print_on(st);
1.208 + st->cr();
1.209 + }
1.210 + }
1.211 + }
1.212 +
1.213 +#ifdef COMPILER2
1.214 + if (DoEscapeAnalysis && is_top() && _objects != NULL) {
1.215 + tty->print_cr("Objects");
1.216 + for (int i = 0; i < _objects->length(); i++) {
1.217 + ObjectValue* sv = (ObjectValue*) _objects->at(i);
1.218 + tty->print(" - %d: ", sv->id());
1.219 + sv->print_fields_on(tty);
1.220 + tty->cr();
1.221 + }
1.222 + }
1.223 +#endif // COMPILER2
1.224 +}
1.225 +
1.226 +#endif
1.227 +
1.228 +void ScopeDesc::verify() {
1.229 + ResourceMark rm;
1.230 + guarantee(method()->is_method(), "type check");
1.231 +
1.232 + // check if we have any illegal elements on the expression stack
1.233 + { GrowableArray<ScopeValue*>* l = expressions();
1.234 + if (l != NULL) {
1.235 + for (int index = 0; index < l->length(); index++) {
1.236 + //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
1.237 + }
1.238 + }
1.239 + }
1.240 +}
