41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 3. Neither the name of the copyright holders nor the names of its
44 * contributors may be used to endorse or promote products derived from
45 * this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
48 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
51 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
57 * THE POSSIBILITY OF SUCH DAMAGE.
58 */
59 package jdk.internal.org.objectweb.asm;
60
61 /**
62 * A non standard class, field, method or code attribute.
63 *
64 * @author Eric Bruneton
65 * @author Eugene Kuleshov
66 */
67 public class Attribute {
68
69 /**
70 * The type of this attribute.
71 */
72 public final String type;
73
74 /**
75 * The raw value of this attribute, used only for unknown attributes.
76 */
77 byte[] value;
78
79 /**
80 * The next attribute in this attribute list. May be <tt>null</tt>.
264 * the maximum stack size of the method corresponding to these
265 * code attributes, or -1 if these attributes are not code
266 * attributes.
267 * @param maxLocals
268 * the maximum number of local variables of the method
269 * corresponding to these code attributes, or -1 if these
270 * attributes are not code attributes.
271 * @param out
272 * where the attributes must be written.
273 */
274 final void put(final ClassWriter cw, final byte[] code, final int len,
275 final int maxStack, final int maxLocals, final ByteVector out) {
276 Attribute attr = this;
277 while (attr != null) {
278 ByteVector b = attr.write(cw, code, len, maxStack, maxLocals);
279 out.putShort(cw.newUTF8(attr.type)).putInt(b.length);
280 out.putByteArray(b.data, 0, b.length);
281 attr = attr.next;
282 }
283 }
284 }
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41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 3. Neither the name of the copyright holders nor the names of its
44 * contributors may be used to endorse or promote products derived from
45 * this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
48 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
51 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
57 * THE POSSIBILITY OF SUCH DAMAGE.
58 */
59 package jdk.internal.org.objectweb.asm;
60
61 import java.util.Arrays;
62
63 /**
64 * A non standard class, field, method or code attribute.
65 *
66 * @author Eric Bruneton
67 * @author Eugene Kuleshov
68 */
69 public class Attribute {
70
71 /**
72 * The type of this attribute.
73 */
74 public final String type;
75
76 /**
77 * The raw value of this attribute, used only for unknown attributes.
78 */
79 byte[] value;
80
81 /**
82 * The next attribute in this attribute list. May be <tt>null</tt>.
266 * the maximum stack size of the method corresponding to these
267 * code attributes, or -1 if these attributes are not code
268 * attributes.
269 * @param maxLocals
270 * the maximum number of local variables of the method
271 * corresponding to these code attributes, or -1 if these
272 * attributes are not code attributes.
273 * @param out
274 * where the attributes must be written.
275 */
276 final void put(final ClassWriter cw, final byte[] code, final int len,
277 final int maxStack, final int maxLocals, final ByteVector out) {
278 Attribute attr = this;
279 while (attr != null) {
280 ByteVector b = attr.write(cw, code, len, maxStack, maxLocals);
281 out.putShort(cw.newUTF8(attr.type)).putInt(b.length);
282 out.putByteArray(b.data, 0, b.length);
283 attr = attr.next;
284 }
285 }
286
287 //The stuff below is temporary - once proper support for nestmate attribute has been added, it can be safely removed.
288 //see also changes in ClassReader.accept.
289
290 public static class NestMembers extends Attribute {
291 public NestMembers() {
292 super("NestMembers");
293 }
294
295 byte[] bytes;
296 String[] classes;
297
298 @Override
299 protected Attribute read(ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels) {
300 int offset = off;
301 NestMembers a = new NestMembers();
302 int size = cr.readShort(off);
303 a.classes = new String[size];
304 off += 2;
305 for (int i = 0; i < size ; i++) {
306 a.classes[i] = cr.readClass(off, buf);
307 off += 2;
308 }
309 a.bytes = Arrays.copyOfRange(cr.b, offset, offset + len);
310 return a;
311 }
312
313 @Override
314 protected ByteVector write(ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals) {
315 ByteVector v = new ByteVector(bytes.length);
316 v.putShort(classes.length);
317 for (String s : classes) {
318 v.putShort(cw.newClass(s));
319 }
320 return v;
321 }
322 }
323
324 public static class NestHost extends Attribute {
325
326 byte[] bytes;
327 String clazz;
328
329 public NestHost() {
330 super("NestHost");
331 }
332
333 @Override
334 protected Attribute read(ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels) {
335 int offset = off;
336 NestHost a = new NestHost();
337 a.clazz = cr.readClass(off, buf);
338 a.bytes = Arrays.copyOfRange(cr.b, offset, offset + len);
339 return a;
340 }
341
342 @Override
343 protected ByteVector write(ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals) {
344 ByteVector v = new ByteVector(bytes.length);
345 v.putShort(cw.newClass(clazz));
346 return v;
347 }
348 }
349
350 static final Attribute[] DEFAULT_ATTRIBUTE_PROTOS = new Attribute[] {
351 new NestMembers(),
352 new NestHost()
353 };
354 }
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