1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/code/debugInfo.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,272 @@
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 +// Classes used for serializing debugging information.
1.29 +// These abstractions are introducted to provide symmetric
1.30 +// read and write operations.
1.31 +
1.32 +// ScopeValue describes the value of a variable/expression in a scope
1.33 +// - LocationValue describes a value in a given location (in frame or register)
1.34 +// - ConstantValue describes a constant
1.35 +
1.36 +class ScopeValue: public ResourceObj {
1.37 + public:
1.38 + // Testers
1.39 + virtual bool is_location() const { return false; }
1.40 + virtual bool is_object() const { return false; }
1.41 + virtual bool is_constant_int() const { return false; }
1.42 + virtual bool is_constant_double() const { return false; }
1.43 + virtual bool is_constant_long() const { return false; }
1.44 + virtual bool is_constant_oop() const { return false; }
1.45 + virtual bool equals(ScopeValue* other) const { return false; }
1.46 +
1.47 + // Serialization of debugging information
1.48 + virtual void write_on(DebugInfoWriteStream* stream) = 0;
1.49 + static ScopeValue* read_from(DebugInfoReadStream* stream);
1.50 +};
1.51 +
1.52 +
1.53 +// A Location value describes a value in a given location; i.e. the corresponding
1.54 +// logical entity (e.g., a method temporary) lives in this location.
1.55 +
1.56 +class LocationValue: public ScopeValue {
1.57 + private:
1.58 + Location _location;
1.59 + public:
1.60 + LocationValue(Location location) { _location = location; }
1.61 + bool is_location() const { return true; }
1.62 + Location location() const { return _location; }
1.63 +
1.64 + // Serialization of debugging information
1.65 + LocationValue(DebugInfoReadStream* stream);
1.66 + void write_on(DebugInfoWriteStream* stream);
1.67 +
1.68 + // Printing
1.69 + void print_on(outputStream* st) const;
1.70 +};
1.71 +
1.72 +
1.73 +// An ObjectValue describes an object eliminated by escape analysis.
1.74 +
1.75 +class ObjectValue: public ScopeValue {
1.76 + private:
1.77 + int _id;
1.78 + ScopeValue* _klass;
1.79 + GrowableArray<ScopeValue*> _field_values;
1.80 + Handle _value;
1.81 + bool _visited;
1.82 +
1.83 + public:
1.84 + ObjectValue(int id, ScopeValue* klass)
1.85 + : _id(id)
1.86 + , _klass(klass)
1.87 + , _field_values()
1.88 + , _value()
1.89 + , _visited(false) {
1.90 + assert(klass->is_constant_oop(), "should be constant klass oop");
1.91 + }
1.92 +
1.93 + ObjectValue(int id)
1.94 + : _id(id)
1.95 + , _klass(NULL)
1.96 + , _field_values()
1.97 + , _value()
1.98 + , _visited(false) {}
1.99 +
1.100 + // Accessors
1.101 + bool is_object() const { return true; }
1.102 + int id() const { return _id; }
1.103 + ScopeValue* klass() const { return _klass; }
1.104 + GrowableArray<ScopeValue*>* field_values() { return &_field_values; }
1.105 + ScopeValue* field_at(int i) const { return _field_values.at(i); }
1.106 + int field_size() { return _field_values.length(); }
1.107 + Handle value() const { return _value; }
1.108 + bool is_visited() const { return _visited; }
1.109 +
1.110 + void set_value(oop value) { _value = Handle(value); }
1.111 + void set_visited(bool visited) { _visited = false; }
1.112 +
1.113 + // Serialization of debugging information
1.114 + void read_object(DebugInfoReadStream* stream);
1.115 + void write_on(DebugInfoWriteStream* stream);
1.116 +
1.117 + // Printing
1.118 + void print_on(outputStream* st) const;
1.119 + void print_fields_on(outputStream* st) const;
1.120 +};
1.121 +
1.122 +
1.123 +// A ConstantIntValue describes a constant int; i.e., the corresponding logical entity
1.124 +// is either a source constant or its computation has been constant-folded.
1.125 +
1.126 +class ConstantIntValue: public ScopeValue {
1.127 + private:
1.128 + jint _value;
1.129 + public:
1.130 + ConstantIntValue(jint value) { _value = value; }
1.131 + jint value() const { return _value; }
1.132 + bool is_constant_int() const { return true; }
1.133 + bool equals(ScopeValue* other) const { return false; }
1.134 +
1.135 + // Serialization of debugging information
1.136 + ConstantIntValue(DebugInfoReadStream* stream);
1.137 + void write_on(DebugInfoWriteStream* stream);
1.138 +
1.139 + // Printing
1.140 + void print_on(outputStream* st) const;
1.141 +};
1.142 +
1.143 +class ConstantLongValue: public ScopeValue {
1.144 + private:
1.145 + jlong _value;
1.146 + public:
1.147 + ConstantLongValue(jlong value) { _value = value; }
1.148 + jlong value() const { return _value; }
1.149 + bool is_constant_long() const { return true; }
1.150 + bool equals(ScopeValue* other) const { return false; }
1.151 +
1.152 + // Serialization of debugging information
1.153 + ConstantLongValue(DebugInfoReadStream* stream);
1.154 + void write_on(DebugInfoWriteStream* stream);
1.155 +
1.156 + // Printing
1.157 + void print_on(outputStream* st) const;
1.158 +};
1.159 +
1.160 +class ConstantDoubleValue: public ScopeValue {
1.161 + private:
1.162 + jdouble _value;
1.163 + public:
1.164 + ConstantDoubleValue(jdouble value) { _value = value; }
1.165 + jdouble value() const { return _value; }
1.166 + bool is_constant_double() const { return true; }
1.167 + bool equals(ScopeValue* other) const { return false; }
1.168 +
1.169 + // Serialization of debugging information
1.170 + ConstantDoubleValue(DebugInfoReadStream* stream);
1.171 + void write_on(DebugInfoWriteStream* stream);
1.172 +
1.173 + // Printing
1.174 + void print_on(outputStream* st) const;
1.175 +};
1.176 +
1.177 +// A ConstantOopWriteValue is created by the compiler to
1.178 +// be written as debugging information.
1.179 +
1.180 +class ConstantOopWriteValue: public ScopeValue {
1.181 + private:
1.182 + jobject _value;
1.183 + public:
1.184 + ConstantOopWriteValue(jobject value) { _value = value; }
1.185 + jobject value() const { return _value; }
1.186 + bool is_constant_oop() const { return true; }
1.187 + bool equals(ScopeValue* other) const { return false; }
1.188 +
1.189 + // Serialization of debugging information
1.190 + void write_on(DebugInfoWriteStream* stream);
1.191 +
1.192 + // Printing
1.193 + void print_on(outputStream* st) const;
1.194 +};
1.195 +
1.196 +// A ConstantOopReadValue is created by the VM when reading
1.197 +// debug information
1.198 +
1.199 +class ConstantOopReadValue: public ScopeValue {
1.200 + private:
1.201 + Handle _value;
1.202 + public:
1.203 + Handle value() const { return _value; }
1.204 + bool is_constant_oop() const { return true; }
1.205 + bool equals(ScopeValue* other) const { return false; }
1.206 +
1.207 + // Serialization of debugging information
1.208 + ConstantOopReadValue(DebugInfoReadStream* stream);
1.209 + void write_on(DebugInfoWriteStream* stream);
1.210 +
1.211 + // Printing
1.212 + void print_on(outputStream* st) const;
1.213 +};
1.214 +
1.215 +// MonitorValue describes the pair used for monitor_enter and monitor_exit.
1.216 +
1.217 +class MonitorValue: public ResourceObj {
1.218 + private:
1.219 + ScopeValue* _owner;
1.220 + Location _basic_lock;
1.221 + bool _eliminated;
1.222 + public:
1.223 + // Constructor
1.224 + MonitorValue(ScopeValue* owner, Location basic_lock, bool eliminated = false);
1.225 +
1.226 + // Accessors
1.227 + ScopeValue* owner() const { return _owner; }
1.228 + Location basic_lock() const { return _basic_lock; }
1.229 + bool eliminated() const { return _eliminated; }
1.230 +
1.231 + // Serialization of debugging information
1.232 + MonitorValue(DebugInfoReadStream* stream);
1.233 + void write_on(DebugInfoWriteStream* stream);
1.234 +
1.235 + // Printing
1.236 + void print_on(outputStream* st) const;
1.237 +};
1.238 +
1.239 +// DebugInfoReadStream specializes CompressedReadStream for reading
1.240 +// debugging information. Used by ScopeDesc.
1.241 +
1.242 +class DebugInfoReadStream : public CompressedReadStream {
1.243 + private:
1.244 + const nmethod* _code;
1.245 + const nmethod* code() const { return _code; }
1.246 + GrowableArray<ScopeValue*>* _obj_pool;
1.247 + public:
1.248 + DebugInfoReadStream(const nmethod* code, int offset, GrowableArray<ScopeValue*>* obj_pool = NULL) :
1.249 + CompressedReadStream(code->scopes_data_begin(), offset) {
1.250 + _code = code;
1.251 + _obj_pool = obj_pool;
1.252 +
1.253 + } ;
1.254 +
1.255 + oop read_oop() {
1.256 + return code()->oop_at(read_int());
1.257 + }
1.258 + ScopeValue* read_object_value();
1.259 + ScopeValue* get_cached_object();
1.260 + // BCI encoding is mostly unsigned, but -1 is a distinguished value
1.261 + int read_bci() { return read_int() + InvocationEntryBci; }
1.262 +};
1.263 +
1.264 +// DebugInfoWriteStream specializes CompressedWriteStream for
1.265 +// writing debugging information. Used by ScopeDescRecorder.
1.266 +
1.267 +class DebugInfoWriteStream : public CompressedWriteStream {
1.268 + private:
1.269 + DebugInformationRecorder* _recorder;
1.270 + DebugInformationRecorder* recorder() const { return _recorder; }
1.271 + public:
1.272 + DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
1.273 + void write_handle(jobject h);
1.274 + void write_bci(int bci) { write_int(bci - InvocationEntryBci); }
1.275 +};
