1 /*
2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // Classes used for serializing debugging information.
26 // These abstractions are introducted to provide symmetric
27 // read and write operations.
28
29 // ScopeValue describes the value of a variable/expression in a scope
30 // - LocationValue describes a value in a given location (in frame or register)
31 // - ConstantValue describes a constant
32
33 class ScopeValue: public ResourceObj {
34 public:
35 // Testers
36 virtual bool is_location() const { return false; }
37 virtual bool is_object() const { return false; }
38 virtual bool is_constant_int() const { return false; }
39 virtual bool is_constant_double() const { return false; }
40 virtual bool is_constant_long() const { return false; }
41 virtual bool is_constant_oop() const { return false; }
42 virtual bool equals(ScopeValue* other) const { return false; }
43
44 // Serialization of debugging information
253 return code()->oop_at(read_int());
254 }
255 ScopeValue* read_object_value();
256 ScopeValue* get_cached_object();
257 // BCI encoding is mostly unsigned, but -1 is a distinguished value
258 int read_bci() { return read_int() + InvocationEntryBci; }
259 };
260
261 // DebugInfoWriteStream specializes CompressedWriteStream for
262 // writing debugging information. Used by ScopeDescRecorder.
263
264 class DebugInfoWriteStream : public CompressedWriteStream {
265 private:
266 DebugInformationRecorder* _recorder;
267 DebugInformationRecorder* recorder() const { return _recorder; }
268 public:
269 DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
270 void write_handle(jobject h);
271 void write_bci(int bci) { write_int(bci - InvocationEntryBci); }
272 };
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1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_CODE_DEBUGINFO_HPP
26 #define SHARE_VM_CODE_DEBUGINFO_HPP
27
28 #include "code/compressedStream.hpp"
29 #include "code/location.hpp"
30 #include "code/nmethod.hpp"
31 #include "code/oopRecorder.hpp"
32 #include "runtime/stackValue.hpp"
33 #include "utilities/growableArray.hpp"
34
35 // Classes used for serializing debugging information.
36 // These abstractions are introducted to provide symmetric
37 // read and write operations.
38
39 // ScopeValue describes the value of a variable/expression in a scope
40 // - LocationValue describes a value in a given location (in frame or register)
41 // - ConstantValue describes a constant
42
43 class ScopeValue: public ResourceObj {
44 public:
45 // Testers
46 virtual bool is_location() const { return false; }
47 virtual bool is_object() const { return false; }
48 virtual bool is_constant_int() const { return false; }
49 virtual bool is_constant_double() const { return false; }
50 virtual bool is_constant_long() const { return false; }
51 virtual bool is_constant_oop() const { return false; }
52 virtual bool equals(ScopeValue* other) const { return false; }
53
54 // Serialization of debugging information
263 return code()->oop_at(read_int());
264 }
265 ScopeValue* read_object_value();
266 ScopeValue* get_cached_object();
267 // BCI encoding is mostly unsigned, but -1 is a distinguished value
268 int read_bci() { return read_int() + InvocationEntryBci; }
269 };
270
271 // DebugInfoWriteStream specializes CompressedWriteStream for
272 // writing debugging information. Used by ScopeDescRecorder.
273
274 class DebugInfoWriteStream : public CompressedWriteStream {
275 private:
276 DebugInformationRecorder* _recorder;
277 DebugInformationRecorder* recorder() const { return _recorder; }
278 public:
279 DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
280 void write_handle(jobject h);
281 void write_bci(int bci) { write_int(bci - InvocationEntryBci); }
282 };
283
284 #endif // SHARE_VM_CODE_DEBUGINFO_HPP
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