1 /*
2 * Copyright 2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.debugger.linux;
26
27 import sun.jvm.hotspot.debugger.*;
28
29 class LinuxAddress implements Address {
30 protected LinuxDebugger debugger;
31 protected long addr;
32
33 LinuxAddress(LinuxDebugger debugger, long addr) {
34 this.debugger = debugger;
35 this.addr = addr;
36 }
37
38 //
39 // Basic Java routines
40 //
41
42 public boolean equals(Object arg) {
43 if (arg == null) {
44 return false;
45 }
46
47 if (!(arg instanceof LinuxAddress)) {
48 return false;
49 }
50
51 return (addr == ((LinuxAddress) arg).addr);
52 }
53
54 public int hashCode() {
55 // FIXME: suggestions on a better hash code?
56 return (int) addr;
57 }
58
59 public String toString() {
60 return debugger.addressValueToString(addr);
61 }
62
63 //
64 // C/C++-related routines
65 //
66
67 public long getCIntegerAt(long offset, long numBytes, boolean isUnsigned)
68 throws UnalignedAddressException, UnmappedAddressException {
69 return debugger.readCInteger(addr + offset, numBytes, isUnsigned);
70 }
71
72 public Address getAddressAt(long offset)
73 throws UnalignedAddressException, UnmappedAddressException {
74 return debugger.readAddress(addr + offset);
75 }
76
77 //
78 // Java-related routines
79 //
80
81 public boolean getJBooleanAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
82 return debugger.readJBoolean(addr + offset);
83 }
84
85 public byte getJByteAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
86 return debugger.readJByte(addr + offset);
87 }
88
89 public char getJCharAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
90 return debugger.readJChar(addr + offset);
91 }
92
93 public double getJDoubleAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
94 return debugger.readJDouble(addr + offset);
95 }
96
97 public float getJFloatAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
98 return debugger.readJFloat(addr + offset);
99 }
100
101 public int getJIntAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
102 return debugger.readJInt(addr + offset);
103 }
104
105 public long getJLongAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
106 return debugger.readJLong(addr + offset);
107 }
108
109 public short getJShortAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
110 return debugger.readJShort(addr + offset);
111 }
112
113 public OopHandle getOopHandleAt(long offset)
114 throws UnalignedAddressException, UnmappedAddressException, NotInHeapException {
115 return debugger.readOopHandle(addr + offset);
116 }
117
118 // Mutators -- not implemented for now (FIXME)
119 public void setCIntegerAt(long offset, long numBytes, long value) {
120 throw new DebuggerException("Unimplemented");
121 }
122 public void setAddressAt(long offset, Address value) {
123 throw new DebuggerException("Unimplemented");
124 }
125 public void setJBooleanAt (long offset, boolean value)
126 throws UnmappedAddressException, UnalignedAddressException {
127 throw new DebuggerException("Unimplemented");
128 }
129 public void setJByteAt (long offset, byte value)
130 throws UnmappedAddressException, UnalignedAddressException {
131 throw new DebuggerException("Unimplemented");
132 }
133 public void setJCharAt (long offset, char value)
134 throws UnmappedAddressException, UnalignedAddressException {
135 throw new DebuggerException("Unimplemented");
136 }
137 public void setJDoubleAt (long offset, double value)
138 throws UnmappedAddressException, UnalignedAddressException {
139 throw new DebuggerException("Unimplemented");
140 }
141 public void setJFloatAt (long offset, float value)
142 throws UnmappedAddressException, UnalignedAddressException {
143 throw new DebuggerException("Unimplemented");
144 }
145 public void setJIntAt (long offset, int value)
146 throws UnmappedAddressException, UnalignedAddressException {
147 throw new DebuggerException("Unimplemented");
148 }
149 public void setJLongAt (long offset, long value)
150 throws UnmappedAddressException, UnalignedAddressException {
151 throw new DebuggerException("Unimplemented");
152 }
153 public void setJShortAt (long offset, short value)
154 throws UnmappedAddressException, UnalignedAddressException {
155 throw new DebuggerException("Unimplemented");
156 }
157 public void setOopHandleAt (long offset, OopHandle value)
158 throws UnmappedAddressException, UnalignedAddressException {
159 throw new DebuggerException("Unimplemented");
160 }
161
162 //
163 // Arithmetic operations -- necessary evil.
164 //
165
166 public Address addOffsetTo (long offset) throws UnsupportedOperationException {
167 long value = addr + offset;
168 if (value == 0) {
169 return null;
170 }
171 return new LinuxAddress(debugger, value);
172 }
173
174 public OopHandle addOffsetToAsOopHandle(long offset) throws UnsupportedOperationException {
175 long value = addr + offset;
176 if (value == 0) {
177 return null;
178 }
179 return new LinuxOopHandle(debugger, value);
180 }
181
182 /** (FIXME: any signed/unsigned issues? Should this work for
183 OopHandles?) */
184 public long minus(Address arg) {
185 if (arg == null) {
186 return addr;
187 }
188 return addr - ((LinuxAddress) arg).addr;
189 }
190
191 // Two's complement representation.
192 // All negative numbers are larger than positive numbers.
193 // Numbers with the same sign can be compared normally.
194 // Test harness is below in main().
195
196 public boolean lessThan (Address a) {
197 if (a == null) {
198 return false;
199 }
200 LinuxAddress arg = (LinuxAddress) a;
201 if ((addr >= 0) && (arg.addr < 0)) {
202 return true;
203 }
204 if ((addr < 0) && (arg.addr >= 0)) {
205 return false;
206 }
207 return (addr < arg.addr);
208 }
209
210 public boolean lessThanOrEqual (Address a) {
211 if (a == null) {
212 return false;
213 }
214 LinuxAddress arg = (LinuxAddress) a;
215 if ((addr >= 0) && (arg.addr < 0)) {
216 return true;
217 }
218 if ((addr < 0) && (arg.addr >= 0)) {
219 return false;
220 }
221 return (addr <= arg.addr);
222 }
223
224 public boolean greaterThan (Address a) {
225 if (a == null) {
226 return true;
227 }
228 LinuxAddress arg = (LinuxAddress) a;
229 if ((addr >= 0) && (arg.addr < 0)) {
230 return false;
231 }
232 if ((addr < 0) && (arg.addr >= 0)) {
233 return true;
234 }
235 return (addr > arg.addr);
236 }
237
238 public boolean greaterThanOrEqual(Address a) {
239 if (a == null) {
240 return true;
241 }
242 LinuxAddress arg = (LinuxAddress) a;
243 if ((addr >= 0) && (arg.addr < 0)) {
244 return false;
245 }
246 if ((addr < 0) && (arg.addr >= 0)) {
247 return true;
248 }
249 return (addr >= arg.addr);
250 }
251
252 public Address andWithMask(long mask) throws UnsupportedOperationException {
253 long value = addr & mask;
254 if (value == 0) {
255 return null;
256 }
257 return new LinuxAddress(debugger, value);
258 }
259
260 public Address orWithMask(long mask) throws UnsupportedOperationException {
261 long value = addr | mask;
262 if (value == 0) {
263 return null;
264 }
265 return new LinuxAddress(debugger, value);
266 }
267
268 public Address xorWithMask(long mask) throws UnsupportedOperationException {
269 long value = addr ^ mask;
270 if (value == 0) {
271 return null;
272 }
273 return new LinuxAddress(debugger, value);
274 }
275
276
277 //--------------------------------------------------------------------------------
278 // Internals only below this point
279 //
280
281 long getValue() {
282 return addr;
283 }
284
285
286 private static void check(boolean arg, String failMessage) {
287 if (!arg) {
288 System.err.println(failMessage + ": FAILED");
289 System.exit(1);
290 }
291 }
292
293 // Test harness
294 public static void main(String[] args) {
295 // p/n indicates whether the interior address is really positive
296 // or negative. In unsigned terms, p1 < p2 < n1 < n2.
297
298 LinuxAddress p1 = new LinuxAddress(null, 0x7FFFFFFFFFFFFFF0L);
299 LinuxAddress p2 = (LinuxAddress) p1.addOffsetTo(10);
300 LinuxAddress n1 = (LinuxAddress) p2.addOffsetTo(10);
301 LinuxAddress n2 = (LinuxAddress) n1.addOffsetTo(10);
302
303 // lessThan positive tests
304 check(p1.lessThan(p2), "lessThan 1");
305 check(p1.lessThan(n1), "lessThan 2");
306 check(p1.lessThan(n2), "lessThan 3");
307 check(p2.lessThan(n1), "lessThan 4");
308 check(p2.lessThan(n2), "lessThan 5");
309 check(n1.lessThan(n2), "lessThan 6");
310
311 // lessThan negative tests
312 check(!p1.lessThan(p1), "lessThan 7");
313 check(!p2.lessThan(p2), "lessThan 8");
314 check(!n1.lessThan(n1), "lessThan 9");
315 check(!n2.lessThan(n2), "lessThan 10");
316
317 check(!p2.lessThan(p1), "lessThan 11");
318 check(!n1.lessThan(p1), "lessThan 12");
319 check(!n2.lessThan(p1), "lessThan 13");
320 check(!n1.lessThan(p2), "lessThan 14");
321 check(!n2.lessThan(p2), "lessThan 15");
322 check(!n2.lessThan(n1), "lessThan 16");
323
324 // lessThanOrEqual positive tests
325 check(p1.lessThanOrEqual(p1), "lessThanOrEqual 1");
326 check(p2.lessThanOrEqual(p2), "lessThanOrEqual 2");
327 check(n1.lessThanOrEqual(n1), "lessThanOrEqual 3");
328 check(n2.lessThanOrEqual(n2), "lessThanOrEqual 4");
329
330 check(p1.lessThanOrEqual(p2), "lessThanOrEqual 5");
331 check(p1.lessThanOrEqual(n1), "lessThanOrEqual 6");
332 check(p1.lessThanOrEqual(n2), "lessThanOrEqual 7");
333 check(p2.lessThanOrEqual(n1), "lessThanOrEqual 8");
334 check(p2.lessThanOrEqual(n2), "lessThanOrEqual 9");
335 check(n1.lessThanOrEqual(n2), "lessThanOrEqual 10");
336
337 // lessThanOrEqual negative tests
338 check(!p2.lessThanOrEqual(p1), "lessThanOrEqual 11");
339 check(!n1.lessThanOrEqual(p1), "lessThanOrEqual 12");
340 check(!n2.lessThanOrEqual(p1), "lessThanOrEqual 13");
341 check(!n1.lessThanOrEqual(p2), "lessThanOrEqual 14");
342 check(!n2.lessThanOrEqual(p2), "lessThanOrEqual 15");
343 check(!n2.lessThanOrEqual(n1), "lessThanOrEqual 16");
344
345 // greaterThan positive tests
346 check(n2.greaterThan(p1), "greaterThan 1");
347 check(n2.greaterThan(p2), "greaterThan 2");
348 check(n2.greaterThan(n1), "greaterThan 3");
349 check(n1.greaterThan(p1), "greaterThan 4");
350 check(n1.greaterThan(p2), "greaterThan 5");
351 check(p2.greaterThan(p1), "greaterThan 6");
352
353 // greaterThan negative tests
354 check(!p1.greaterThan(p1), "greaterThan 7");
355 check(!p2.greaterThan(p2), "greaterThan 8");
356 check(!n1.greaterThan(n1), "greaterThan 9");
357 check(!n2.greaterThan(n2), "greaterThan 10");
358
359 check(!p1.greaterThan(n2), "greaterThan 11");
360 check(!p2.greaterThan(n2), "greaterThan 12");
361 check(!n1.greaterThan(n2), "greaterThan 13");
362 check(!p1.greaterThan(n1), "greaterThan 14");
363 check(!p2.greaterThan(n1), "greaterThan 15");
364 check(!p1.greaterThan(p2), "greaterThan 16");
365
366 // greaterThanOrEqual positive tests
367 check(p1.greaterThanOrEqual(p1), "greaterThanOrEqual 1");
368 check(p2.greaterThanOrEqual(p2), "greaterThanOrEqual 2");
369 check(n1.greaterThanOrEqual(n1), "greaterThanOrEqual 3");
370 check(n2.greaterThanOrEqual(n2), "greaterThanOrEqual 4");
371
372 check(n2.greaterThanOrEqual(p1), "greaterThanOrEqual 5");
373 check(n2.greaterThanOrEqual(p2), "greaterThanOrEqual 6");
374 check(n2.greaterThanOrEqual(n1), "greaterThanOrEqual 7");
375 check(n1.greaterThanOrEqual(p1), "greaterThanOrEqual 8");
376 check(n1.greaterThanOrEqual(p2), "greaterThanOrEqual 9");
377 check(p2.greaterThanOrEqual(p1), "greaterThanOrEqual 10");
378
379 // greaterThanOrEqual negative tests
380 check(!p1.greaterThanOrEqual(n2), "greaterThanOrEqual 11");
381 check(!p2.greaterThanOrEqual(n2), "greaterThanOrEqual 12");
382 check(!n1.greaterThanOrEqual(n2), "greaterThanOrEqual 13");
383 check(!p1.greaterThanOrEqual(n1), "greaterThanOrEqual 14");
384 check(!p2.greaterThanOrEqual(n1), "greaterThanOrEqual 15");
385 check(!p1.greaterThanOrEqual(p2), "greaterThanOrEqual 16");
386
387 System.err.println("LinuxAddress: all tests passed successfully.");
388 }
389 }