1 /*
2 * Copyright (c) 1997, 2024, 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 #include "precompiled.hpp"
26 #include "classfile/classPrinter.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/bytecodeStream.hpp"
30 #include "interpreter/bytecodeTracer.hpp"
31 #include "interpreter/bytecodes.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "oops/constantPool.inline.hpp"
36 #include "oops/methodData.hpp"
37 #include "oops/method.hpp"
38 #include "oops/resolvedFieldEntry.hpp"
39 #include "oops/resolvedIndyEntry.hpp"
40 #include "oops/resolvedMethodEntry.hpp"
41 #include "runtime/handles.inline.hpp"
42 #include "runtime/mutexLocker.hpp"
43 #include "runtime/osThread.hpp"
44 #include "runtime/timer.hpp"
45 #include "utilities/align.hpp"
46
47 // Prints the current bytecode and its attributes using bytecode-specific information.
48
49 class BytecodePrinter {
50 private:
51 // %%% This field is not GC-ed, and so can contain garbage
52 // between critical sections. Use only pointer-comparison
53 // operations on the pointer, except within a critical section.
54 // (Also, ensure that occasional false positives are benign.)
55 Method* _current_method;
56 bool _is_wide;
57 Bytecodes::Code _code;
58 address _next_pc; // current decoding position
59 int _flags;
60 bool _is_linked;
61
62 bool is_linked() const { return _is_linked; }
63 void align() { _next_pc = align_up(_next_pc, sizeof(jint)); }
64 int get_byte() { return *(jbyte*) _next_pc++; } // signed
65 int get_index_u1() { return *(address)_next_pc++; } // returns 0x00 - 0xff as an int
66 short get_short() { short i = Bytes::get_Java_u2 (_next_pc); _next_pc += 2; return i; }
67 int get_int() { int i = Bytes::get_Java_u4 (_next_pc); _next_pc += 4; return i; }
68 int get_native_index_u2() { int i = Bytes::get_native_u2(_next_pc); _next_pc += 2; return i; }
69 int get_native_index_u4() { int i = Bytes::get_native_u4(_next_pc); _next_pc += 4; return i; }
70 int get_Java_index_u2() { int i = Bytes::get_Java_u2 (_next_pc); _next_pc += 2; return i; }
71 int get_Java_index_u4() { int i = Bytes::get_Java_u4 (_next_pc); _next_pc += 4; return i; }
72 int get_index_special() { return (is_wide()) ? get_Java_index_u2() : get_index_u1(); }
73 Method* method() const { return _current_method; }
74 bool is_wide() const { return _is_wide; }
75 Bytecodes::Code raw_code() const { return Bytecodes::Code(_code); }
76 ConstantPool* constants() const { return method()->constants(); }
77 ConstantPoolCache* cpcache() const { assert(is_linked(), "must be"); return constants()->cache(); }
78
79 void print_constant(int i, outputStream* st);
80 void print_cpcache_entry(int cpc_index, outputStream* st);
81 void print_invokedynamic(int indy_index, int cp_index, outputStream* st);
82 void print_bsm(int cp_index, outputStream* st);
83 void print_field_or_method(int cp_index, outputStream* st);
84 void print_dynamic(int cp_index, outputStream* st);
85 void print_attributes(int bci, outputStream* st);
86 void bytecode_epilog(int bci, outputStream* st);
87
88 public:
89 BytecodePrinter(int flags = 0) {
90 _is_wide = false;
91 _code = Bytecodes::_illegal;
92 _flags = flags;
93 }
94
95 // This method is called while executing the raw bytecodes, so none of
96 // the adjustments that BytecodeStream performs applies.
97 void trace(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) {
98 ResourceMark rm;
99 bool method_changed = _current_method != method();
100 if (method_changed) {
101 // Note 1: This code will not work as expected with true MT/MP.
102 // Need an explicit lock or a different solution.
103 // It is possible for this block to be skipped, if a garbage
104 // _current_method pointer happens to have the same bits as
105 // the incoming method. We could lose a line of trace output.
106 // This is acceptable in a debug-only feature.
107 st->cr();
108 st->print("[" UINTX_FORMAT "] ", Thread::current()->osthread()->thread_id_for_printing());
109 method->print_name(st);
110 st->cr();
111 _current_method = method();
112 _is_linked = method->method_holder()->is_linked();
113 assert(_is_linked, "this function must be called on methods that are already executing");
114 }
115 Bytecodes::Code code;
116 if (is_wide()) {
117 // bcp wasn't advanced if previous bytecode was _wide.
118 code = Bytecodes::code_at(method(), bcp+1);
119 } else {
120 code = Bytecodes::code_at(method(), bcp);
121 }
122 _code = code;
123 _next_pc = is_wide() ? bcp+2 : bcp+1;
124 // Trace each bytecode unless we're truncating the tracing output, then only print the first
125 // bytecode in every method as well as returns/throws that pop control flow
126 if (!TraceBytecodesTruncated || method_changed ||
127 code == Bytecodes::_athrow ||
128 code == Bytecodes::_return_register_finalizer ||
129 (code >= Bytecodes::_ireturn && code <= Bytecodes::_return)) {
130 int bci = (int)(bcp - method->code_base());
131 st->print("[" UINTX_FORMAT "] ", Thread::current()->osthread()->thread_id_for_printing());
132 if (Verbose) {
133 st->print("%8d %4d " INTPTR_FORMAT " " INTPTR_FORMAT " %s",
134 BytecodeCounter::counter_value(), bci, tos, tos2, Bytecodes::name(code));
135 } else {
136 st->print("%8d %4d %s",
137 BytecodeCounter::counter_value(), bci, Bytecodes::name(code));
138 }
139 print_attributes(bci, st);
140 }
141 // Set is_wide for the next one, since the caller of this doesn't skip
142 // the next bytecode.
143 _is_wide = (code == Bytecodes::_wide);
144 _code = Bytecodes::_illegal;
145
146 #ifndef PRODUCT
147 if (TraceBytecodesStopAt != 0 && BytecodeCounter::counter_value() >= TraceBytecodesStopAt) {
148 TraceBytecodes = false;
149 }
150 #endif
151 }
152
153 // Used for Method*::print_codes(). The input bcp comes from
154 // BytecodeStream, which will skip wide bytecodes.
155 void trace(const methodHandle& method, address bcp, outputStream* st) {
156 _current_method = method();
157 _is_linked = method->method_holder()->is_linked();
158 ResourceMark rm;
159 Bytecodes::Code code = Bytecodes::code_at(method(), bcp);
160 // Set is_wide
161 _is_wide = (code == Bytecodes::_wide);
162 if (is_wide()) {
163 code = Bytecodes::code_at(method(), bcp+1);
164 }
165 _code = code;
166 int bci = (int)(bcp - method->code_base());
167 // Print bytecode index and name
168 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_BYTECODE_ADDR)) {
169 st->print(INTPTR_FORMAT " ", p2i(bcp));
170 }
171 if (is_wide()) {
172 st->print("%4d %s_w", bci, Bytecodes::name(code));
173 } else {
174 st->print("%4d %s", bci, Bytecodes::name(code));
175 }
176 _next_pc = is_wide() ? bcp+2 : bcp+1;
177 print_attributes(bci, st);
178 bytecode_epilog(bci, st);
179 }
180 };
181
182 // We need a global instance to keep track of the states when the bytecodes
183 // are executed. Access by multiple threads are controlled by ttyLocker.
184 static BytecodePrinter _interpreter_printer;
185
186 void BytecodeTracer::trace_interpreter(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) {
187 if (TraceBytecodes && BytecodeCounter::counter_value() >= TraceBytecodesAt) {
188 ttyLocker ttyl; // 5065316: keep the following output coherent
189 // The ttyLocker also prevents races between two threads
190 // trying to use the single instance of BytecodePrinter.
191 //
192 // There used to be a leaf mutex here, but the ttyLocker will
193 // work just as well, as long as the printing operations never block.
194 _interpreter_printer.trace(method, bcp, tos, tos2, st);
195 }
196 }
197
198 void BytecodeTracer::print_method_codes(const methodHandle& method, int from, int to, outputStream* st, int flags) {
199 BytecodePrinter method_printer(flags);
200 BytecodeStream s(method);
201 s.set_interval(from, to);
202
203 // Keep output to st coherent: collect all lines and print at once.
204 ResourceMark rm;
205 stringStream ss;
206 while (s.next() >= 0) {
207 method_printer.trace(method, s.bcp(), &ss);
208 }
209 st->print("%s", ss.as_string());
210 }
211
212 void BytecodePrinter::print_constant(int cp_index, outputStream* st) {
213 ConstantPool* constants = method()->constants();
214 constantTag tag = constants->tag_at(cp_index);
215
216 if (tag.is_int()) {
217 st->print_cr(" " INT32_FORMAT, constants->int_at(cp_index));
218 } else if (tag.is_long()) {
219 st->print_cr(" " INT64_FORMAT, (int64_t)(constants->long_at(cp_index)));
220 } else if (tag.is_float()) {
221 st->print_cr(" %f", constants->float_at(cp_index));
222 } else if (tag.is_double()) {
223 st->print_cr(" %f", constants->double_at(cp_index));
224 } else if (tag.is_string()) {
225 const char* string = constants->unresolved_string_at(cp_index)->as_quoted_ascii();
226 st->print_cr(" \"%s\"", string);
227 } else if (tag.is_klass()) {
228 st->print_cr(" %s", constants->resolved_klass_at(cp_index)->external_name());
229 } else if (tag.is_unresolved_klass()) {
230 st->print_cr(" %s", constants->klass_at_noresolve(cp_index)->as_quoted_ascii());
231 } else if (tag.is_method_type()) {
232 int i2 = constants->method_type_index_at(cp_index);
233 st->print(" <MethodType> %d", i2);
234 st->print_cr(" %s", constants->symbol_at(i2)->as_quoted_ascii());
235 } else if (tag.is_method_handle()) {
236 int kind = constants->method_handle_ref_kind_at(cp_index);
237 int i2 = constants->method_handle_index_at(cp_index);
238 st->print(" <MethodHandle of kind %d index at %d>", kind, i2);
239 print_field_or_method(i2, st);
240 } else if (tag.is_dynamic_constant()) {
241 print_dynamic(cp_index, st);
242 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_DYNAMIC)) {
243 print_bsm(cp_index, st);
244 }
245 } else {
246 st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
247 }
248 }
249
250 // Fieldref, Methodref, or InterfaceMethodref
251 void BytecodePrinter::print_field_or_method(int cp_index, outputStream* st) {
252 ConstantPool* constants = method()->constants();
253 constantTag tag = constants->tag_at(cp_index);
254
255 switch (tag.value()) {
256 case JVM_CONSTANT_Fieldref:
257 case JVM_CONSTANT_Methodref:
258 case JVM_CONSTANT_InterfaceMethodref:
259 break;
260 default:
261 st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
262 return;
263 }
264
265 Symbol* name = constants->uncached_name_ref_at(cp_index);
266 Symbol* signature = constants->uncached_signature_ref_at(cp_index);
267 Symbol* klass = constants->klass_name_at(constants->uncached_klass_ref_index_at(cp_index));
268 const char* sep = (tag.is_field() ? ":" : "");
269 st->print_cr(" %d <%s.%s%s%s> ", cp_index, klass->as_C_string(), name->as_C_string(), sep, signature->as_C_string());
270 }
271
272 // JVM_CONSTANT_Dynamic or JVM_CONSTANT_InvokeDynamic
273 void BytecodePrinter::print_dynamic(int cp_index, outputStream* st) {
274 ConstantPool* constants = method()->constants();
275 constantTag tag = constants->tag_at(cp_index);
276
277 switch (tag.value()) {
278 case JVM_CONSTANT_Dynamic:
279 case JVM_CONSTANT_InvokeDynamic:
280 break;
281 default:
282 st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
283 return;
284 }
285
286 int bsm = constants->bootstrap_method_ref_index_at(cp_index);
287 st->print(" bsm=%d", bsm);
288
289 Symbol* name = constants->uncached_name_ref_at(cp_index);
290 Symbol* signature = constants->uncached_signature_ref_at(cp_index);
291 const char* sep = tag.is_dynamic_constant() ? ":" : "";
292 st->print_cr(" %d <%s%s%s>", cp_index, name->as_C_string(), sep, signature->as_C_string());
293 }
294
295 void BytecodePrinter::print_invokedynamic(int indy_index, int cp_index, outputStream* st) {
296 print_dynamic(cp_index, st);
297
298 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_DYNAMIC)) {
299 print_bsm(cp_index, st);
300
301 if (is_linked()) {
302 ResolvedIndyEntry* indy_entry = constants()->resolved_indy_entry_at(indy_index);
303 st->print(" ResolvedIndyEntry: ");
304 indy_entry->print_on(st);
305 }
306 }
307 }
308
309 // cp_index: must be the cp_index of a JVM_CONSTANT_{Dynamic, DynamicInError, InvokeDynamic}
310 void BytecodePrinter::print_bsm(int cp_index, outputStream* st) {
311 assert(constants()->tag_at(cp_index).has_bootstrap(), "must be");
312 int bsm = constants()->bootstrap_method_ref_index_at(cp_index);
313 const char* ref_kind = "";
314 switch (constants()->method_handle_ref_kind_at(bsm)) {
315 case JVM_REF_getField : ref_kind = "REF_getField"; break;
316 case JVM_REF_getStatic : ref_kind = "REF_getStatic"; break;
317 case JVM_REF_putField : ref_kind = "REF_putField"; break;
318 case JVM_REF_putStatic : ref_kind = "REF_putStatic"; break;
319 case JVM_REF_invokeVirtual : ref_kind = "REF_invokeVirtual"; break;
320 case JVM_REF_invokeStatic : ref_kind = "REF_invokeStatic"; break;
321 case JVM_REF_invokeSpecial : ref_kind = "REF_invokeSpecial"; break;
322 case JVM_REF_newInvokeSpecial : ref_kind = "REF_newInvokeSpecial"; break;
323 case JVM_REF_invokeInterface : ref_kind = "REF_invokeInterface"; break;
324 default : ShouldNotReachHere();
325 }
326 st->print(" BSM: %s", ref_kind);
327 print_field_or_method(constants()->method_handle_index_at(bsm), st);
328 int argc = constants()->bootstrap_argument_count_at(cp_index);
329 st->print(" arguments[%d] = {", argc);
330 if (argc > 0) {
331 st->cr();
332 for (int arg_i = 0; arg_i < argc; arg_i++) {
333 int arg = constants()->bootstrap_argument_index_at(cp_index, arg_i);
334 st->print(" ");
335 print_constant(arg, st);
336 }
337 }
338 st->print_cr(" }");
339 }
340
341 void BytecodePrinter::print_attributes(int bci, outputStream* st) {
342 // Show attributes of pre-rewritten codes
343 Bytecodes::Code code = Bytecodes::java_code(raw_code());
344 // If the code doesn't have any fields there's nothing to print.
345 // note this is ==1 because the tableswitch and lookupswitch are
346 // zero size (for some reason) and we want to print stuff out for them.
347 // Also skip this if we're truncating bytecode output
348 if (TraceBytecodesTruncated || Bytecodes::length_for(code) == 1) {
349 st->cr();
350 return;
351 }
352
353 switch(code) {
354 // Java specific bytecodes only matter.
355 case Bytecodes::_bipush:
356 st->print_cr(" " INT32_FORMAT, get_byte());
357 break;
358 case Bytecodes::_sipush:
359 st->print_cr(" " INT32_FORMAT, get_short());
360 break;
361 case Bytecodes::_ldc:
362 {
363 int cp_index;
364 if (Bytecodes::uses_cp_cache(raw_code())) {
365 assert(is_linked(), "fast ldc bytecode must be in linked classes");
366 int obj_index = get_index_u1();
367 cp_index = constants()->object_to_cp_index(obj_index);
368 } else {
369 cp_index = get_index_u1();
370 }
371 print_constant(cp_index, st);
372 }
373 break;
374
375 case Bytecodes::_ldc_w:
376 case Bytecodes::_ldc2_w:
377 {
378 int cp_index;
379 if (Bytecodes::uses_cp_cache(raw_code())) {
380 assert(is_linked(), "fast ldc bytecode must be in linked classes");
381 int obj_index = get_native_index_u2();
382 cp_index = constants()->object_to_cp_index(obj_index);
383 } else {
384 cp_index = get_Java_index_u2();
385 }
386 print_constant(cp_index, st);
387 }
388 break;
389
390 case Bytecodes::_iload:
391 case Bytecodes::_lload:
392 case Bytecodes::_fload:
393 case Bytecodes::_dload:
394 case Bytecodes::_aload:
395 case Bytecodes::_istore:
396 case Bytecodes::_lstore:
397 case Bytecodes::_fstore:
398 case Bytecodes::_dstore:
399 case Bytecodes::_astore:
400 st->print_cr(" #%d", get_index_special());
401 break;
402
403 case Bytecodes::_iinc:
404 { int index = get_index_special();
405 jint offset = is_wide() ? get_short(): get_byte();
406 st->print_cr(" #%d " INT32_FORMAT, index, offset);
407 }
408 break;
409
410 case Bytecodes::_newarray: {
411 BasicType atype = (BasicType)get_index_u1();
412 const char* str = type2name(atype);
413 if (str == nullptr || is_reference_type(atype)) {
414 assert(false, "Unidentified basic type");
415 }
416 st->print_cr(" %s", str);
417 }
418 break;
419 case Bytecodes::_anewarray: {
420 int klass_index = get_Java_index_u2();
421 ConstantPool* constants = method()->constants();
422 Symbol* name = constants->klass_name_at(klass_index);
423 st->print_cr(" %s ", name->as_C_string());
424 }
425 break;
426 case Bytecodes::_multianewarray: {
427 int klass_index = get_Java_index_u2();
428 int nof_dims = get_index_u1();
429 ConstantPool* constants = method()->constants();
430 Symbol* name = constants->klass_name_at(klass_index);
431 st->print_cr(" %s %d", name->as_C_string(), nof_dims);
432 }
433 break;
434
435 case Bytecodes::_ifeq:
436 case Bytecodes::_ifnull:
437 case Bytecodes::_iflt:
438 case Bytecodes::_ifle:
439 case Bytecodes::_ifne:
440 case Bytecodes::_ifnonnull:
441 case Bytecodes::_ifgt:
442 case Bytecodes::_ifge:
443 case Bytecodes::_if_icmpeq:
444 case Bytecodes::_if_icmpne:
445 case Bytecodes::_if_icmplt:
446 case Bytecodes::_if_icmpgt:
447 case Bytecodes::_if_icmple:
448 case Bytecodes::_if_icmpge:
449 case Bytecodes::_if_acmpeq:
450 case Bytecodes::_if_acmpne:
451 case Bytecodes::_goto:
452 case Bytecodes::_jsr:
453 st->print_cr(" %d", bci + get_short());
454 break;
455
456 case Bytecodes::_goto_w:
457 case Bytecodes::_jsr_w:
458 st->print_cr(" %d", bci + get_int());
459 break;
460
461 case Bytecodes::_ret: st->print_cr(" %d", get_index_special()); break;
462
463 case Bytecodes::_tableswitch:
464 { align();
465 int default_dest = bci + get_int();
466 int lo = get_int();
467 int hi = get_int();
468 int len = hi - lo + 1;
469 jint* dest = NEW_RESOURCE_ARRAY(jint, len);
470 for (int i = 0; i < len; i++) {
471 dest[i] = bci + get_int();
472 }
473 st->print(" %d " INT32_FORMAT " " INT32_FORMAT " ",
474 default_dest, lo, hi);
475 const char *comma = "";
476 for (int ll = lo; ll <= hi; ll++) {
477 int idx = ll - lo;
478 st->print("%s %d:" INT32_FORMAT " (delta: %d)", comma, ll, dest[idx], dest[idx]-bci);
479 comma = ",";
480 }
481 st->cr();
482 }
483 break;
484 case Bytecodes::_lookupswitch:
485 { align();
486 int default_dest = bci + get_int();
487 int len = get_int();
488 jint* key = NEW_RESOURCE_ARRAY(jint, len);
489 jint* dest = NEW_RESOURCE_ARRAY(jint, len);
490 for (int i = 0; i < len; i++) {
491 key [i] = get_int();
492 dest[i] = bci + get_int();
493 };
494 st->print(" %d %d ", default_dest, len);
495 const char *comma = "";
496 for (int ll = 0; ll < len; ll++) {
497 st->print("%s " INT32_FORMAT ":" INT32_FORMAT, comma, key[ll], dest[ll]);
498 comma = ",";
499 }
500 st->cr();
501 }
502 break;
503
504 case Bytecodes::_putstatic:
505 case Bytecodes::_getstatic:
506 case Bytecodes::_putfield:
507 case Bytecodes::_getfield:
508 {
509 int cp_index;
510 if (is_linked()) {
511 int field_index = get_native_index_u2();
512 cp_index = cpcache()->resolved_field_entry_at(field_index)->constant_pool_index();
513 } else {
514 cp_index = get_Java_index_u2();
515 }
516 print_field_or_method(cp_index, st);
517 }
518 break;
519
520 case Bytecodes::_invokevirtual:
521 case Bytecodes::_invokespecial:
522 case Bytecodes::_invokestatic:
523 {
524 int cp_index;
525 if (is_linked()) {
526 int method_index = get_native_index_u2();
527 ResolvedMethodEntry* method_entry = cpcache()->resolved_method_entry_at(method_index);
528 cp_index = method_entry->constant_pool_index();
529 print_field_or_method(cp_index, st);
530
531 if (raw_code() == Bytecodes::_invokehandle &&
532 ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_METHOD_HANDLE)) {
533 assert(is_linked(), "invokehandle is only in rewritten methods");
534 method_entry->print_on(st);
535 if (method_entry->has_appendix()) {
536 st->print(" appendix: ");
537 constants()->resolved_reference_from_method(method_index)->print_on(st);
538 }
539 }
540 } else {
541 cp_index = get_Java_index_u2();
542 print_field_or_method(cp_index, st);
543 }
544 }
545 break;
546
547 case Bytecodes::_invokeinterface:
548 {
549 int cp_index;
550 if (is_linked()) {
551 int method_index = get_native_index_u2();
552 cp_index = cpcache()->resolved_method_entry_at(method_index)->constant_pool_index();
553 } else {
554 cp_index = get_Java_index_u2();
555 }
556 int count = get_index_u1(); // TODO: this is not printed.
557 get_byte(); // ignore zero byte
558 print_field_or_method(cp_index, st);
559 }
560 break;
561
562 case Bytecodes::_invokedynamic:
563 {
564 int indy_index;
565 int cp_index;
566 if (is_linked()) {
567 indy_index = get_native_index_u4();
568 cp_index = constants()->resolved_indy_entry_at(indy_index)->constant_pool_index();
569 } else {
570 indy_index = -1;
571 cp_index = get_Java_index_u2();
572 get_byte(); // ignore zero byte
573 get_byte(); // ignore zero byte
574 }
575 print_invokedynamic(indy_index, cp_index, st);
576 }
577 break;
578
579 case Bytecodes::_new:
580 case Bytecodes::_checkcast:
581 case Bytecodes::_instanceof:
582 { int i = get_Java_index_u2();
583 ConstantPool* constants = method()->constants();
584 Symbol* name = constants->klass_name_at(i);
585 st->print_cr(" %d <%s>", i, name->as_C_string());
586 }
587 break;
588
589 case Bytecodes::_wide:
590 // length is zero not one, but printed with no more info.
591 break;
592
593 default:
594 ShouldNotReachHere();
595 break;
596 }
597 }
598
599
600 void BytecodePrinter::bytecode_epilog(int bci, outputStream* st) {
601 MethodData* mdo = method()->method_data();
602 if (mdo != nullptr) {
603
604 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
605 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
606
607 ProfileData* data = mdo->bci_to_data(bci);
608 if (data != nullptr) {
609 st->print(" %d ", mdo->dp_to_di(data->dp()));
610 st->fill_to(7);
611 data->print_data_on(st, mdo);
612 }
613 }
614 }