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 "cds/heapShared.hpp"
27 #include "classfile/classPrinter.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "interpreter/bytecodeHistogram.hpp"
30 #include "interpreter/bytecodeStream.hpp"
31 #include "interpreter/bytecodeTracer.hpp"
32 #include "interpreter/bytecodes.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/constantPool.inline.hpp"
37 #include "oops/methodData.hpp"
38 #include "oops/method.hpp"
39 #include "oops/resolvedFieldEntry.hpp"
40 #include "oops/resolvedIndyEntry.hpp"
41 #include "oops/resolvedMethodEntry.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/mutexLocker.hpp"
44 #include "runtime/osThread.hpp"
45 #include "runtime/timer.hpp"
46 #include "utilities/align.hpp"
47
48 // Prints the current bytecode and its attributes using bytecode-specific information.
49
50 class BytecodePrinter {
51 private:
52 // %%% This field is not GC-ed, and so can contain garbage
53 // between critical sections. Use only pointer-comparison
54 // operations on the pointer, except within a critical section.
55 // (Also, ensure that occasional false positives are benign.)
56 Method* _current_method;
57 bool _is_wide;
58 Bytecodes::Code _code;
59 address _next_pc; // current decoding position
60 int _flags;
61 bool _is_linked;
62
63 bool is_linked() const { return _is_linked; }
64 void align() { _next_pc = align_up(_next_pc, sizeof(jint)); }
65 int get_byte() { return *(jbyte*) _next_pc++; } // signed
66 int get_index_u1() { return *(address)_next_pc++; } // returns 0x00 - 0xff as an int
67 short get_short() { short i = Bytes::get_Java_u2 (_next_pc); _next_pc += 2; return i; }
68 int get_int() { int i = Bytes::get_Java_u4 (_next_pc); _next_pc += 4; return i; }
69 int get_native_index_u2() { int i = Bytes::get_native_u2(_next_pc); _next_pc += 2; return i; }
70 int get_native_index_u4() { int i = Bytes::get_native_u4(_next_pc); _next_pc += 4; return i; }
71 int get_Java_index_u2() { int i = Bytes::get_Java_u2 (_next_pc); _next_pc += 2; return i; }
72 int get_Java_index_u4() { int i = Bytes::get_Java_u4 (_next_pc); _next_pc += 4; return i; }
73 int get_index_special() { return (is_wide()) ? get_Java_index_u2() : get_index_u1(); }
74 Method* method() const { return _current_method; }
75 bool is_wide() const { return _is_wide; }
76 Bytecodes::Code raw_code() const { return Bytecodes::Code(_code); }
77 ConstantPool* constants() const { return method()->constants(); }
78 ConstantPoolCache* cpcache() const { assert(is_linked(), "must be"); return constants()->cache(); }
79
80 void print_constant(int i, outputStream* st);
81 void print_cpcache_entry(int cpc_index, outputStream* st);
82 void print_invokedynamic(int indy_index, int cp_index, outputStream* st);
83 void print_bsm(int cp_index, outputStream* st);
84 void print_field_or_method(int cp_index, outputStream* st);
85 void print_dynamic(int cp_index, outputStream* st);
86 void print_attributes(int bci, outputStream* st);
87 void bytecode_epilog(int bci, outputStream* st);
88
89 public:
90 BytecodePrinter(int flags = 0) {
91 _is_wide = false;
92 _code = Bytecodes::_illegal;
93 _flags = flags;
94 }
95
96 // This method is called while executing the raw bytecodes, so none of
97 // the adjustments that BytecodeStream performs applies.
98 void trace(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) {
99 ResourceMark rm;
100 bool method_changed = _current_method != method();
101 if (method_changed) {
102 // Note 1: This code will not work as expected with true MT/MP.
103 // Need an explicit lock or a different solution.
104 // It is possible for this block to be skipped, if a garbage
105 // _current_method pointer happens to have the same bits as
106 // the incoming method. We could lose a line of trace output.
107 // This is acceptable in a debug-only feature.
108 st->cr();
109 st->print("[" UINTX_FORMAT "] ", Thread::current()->osthread()->thread_id_for_printing());
110 method->print_name(st);
111 st->cr();
112 _current_method = method();
113 _is_linked = method->method_holder()->is_linked();
114 assert(_is_linked, "this function must be called on methods that are already executing");
115 }
116 Bytecodes::Code code;
117 if (is_wide()) {
118 // bcp wasn't advanced if previous bytecode was _wide.
119 code = Bytecodes::code_at(method(), bcp+1);
120 } else {
121 code = Bytecodes::code_at(method(), bcp);
122 }
123 _code = code;
124 _next_pc = is_wide() ? bcp+2 : bcp+1;
125 // Trace each bytecode unless we're truncating the tracing output, then only print the first
126 // bytecode in every method as well as returns/throws that pop control flow
127 if (!TraceBytecodesTruncated || method_changed ||
128 code == Bytecodes::_athrow ||
129 code == Bytecodes::_return_register_finalizer ||
130 (code >= Bytecodes::_ireturn && code <= Bytecodes::_return)) {
131 int bci = (int)(bcp - method->code_base());
132 st->print("[" UINTX_FORMAT "] ", Thread::current()->osthread()->thread_id_for_printing());
133 if (Verbose) {
134 st->print(JLONG_FORMAT_W(8) " %4d " INTPTR_FORMAT " " INTPTR_FORMAT " %s",
135 BytecodeCounter::counter_value(), bci, tos, tos2, Bytecodes::name(code));
136 } else {
137 st->print(JLONG_FORMAT_W(8) " %4d %s",
138 BytecodeCounter::counter_value(), bci, Bytecodes::name(code));
139 }
140 print_attributes(bci, st);
141 }
142 // Set is_wide for the next one, since the caller of this doesn't skip
143 // the next bytecode.
144 _is_wide = (code == Bytecodes::_wide);
145 _code = Bytecodes::_illegal;
146
147 #ifndef PRODUCT
148 if (TraceBytecodesStopAt != 0 && BytecodeCounter::counter_value() >= TraceBytecodesStopAt) {
149 TraceBytecodes = false;
150 }
151 #endif
152 }
153
154 // Used for Method*::print_codes(). The input bcp comes from
155 // BytecodeStream, which will skip wide bytecodes.
156 void trace(const methodHandle& method, address bcp, outputStream* st) {
157 _current_method = method();
158 _is_linked = method->method_holder()->is_linked();
159 ResourceMark rm;
160 Bytecodes::Code code = Bytecodes::code_at(method(), bcp);
161 // Set is_wide
162 _is_wide = (code == Bytecodes::_wide);
163 if (is_wide()) {
164 code = Bytecodes::code_at(method(), bcp+1);
165 }
166 _code = code;
167 int bci = (int)(bcp - method->code_base());
168 // Print bytecode index and name
169 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_BYTECODE_ADDR)) {
170 st->print(INTPTR_FORMAT " ", p2i(bcp));
171 }
172 if (is_wide()) {
173 st->print("%4d %s_w", bci, Bytecodes::name(code));
174 } else {
175 st->print("%4d %s", bci, Bytecodes::name(code));
176 }
177 _next_pc = is_wide() ? bcp+2 : bcp+1;
178 print_attributes(bci, st);
179 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_PROFILE)) {
180 bytecode_epilog(bci, st);
181 }
182 }
183 };
184
185 // We need a global instance to keep track of the states when the bytecodes
186 // are executed. Access by multiple threads are controlled by ttyLocker.
187 static BytecodePrinter _interpreter_printer;
188
189 void BytecodeTracer::trace_interpreter(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) {
190 if (TraceBytecodes && BytecodeCounter::counter_value() >= TraceBytecodesAt) {
191 ttyLocker ttyl; // 5065316: keep the following output coherent
192 // The ttyLocker also prevents races between two threads
193 // trying to use the single instance of BytecodePrinter.
194 //
195 // There used to be a leaf mutex here, but the ttyLocker will
196 // work just as well, as long as the printing operations never block.
197 _interpreter_printer.trace(method, bcp, tos, tos2, st);
198 }
199 }
200
201 void BytecodeTracer::print_method_codes(const methodHandle& method, int from, int to, outputStream* st, int flags) {
202 BytecodePrinter method_printer(flags);
203 BytecodeStream s(method);
204 s.set_interval(from, to);
205
206 // Keep output to st coherent: collect all lines and print at once.
207 ResourceMark rm;
208 stringStream ss;
209 while (s.next() >= 0) {
210 method_printer.trace(method, s.bcp(), &ss);
211 }
212 st->print("%s", ss.as_string());
213 }
214
215 void BytecodePrinter::print_constant(int cp_index, outputStream* st) {
216 ConstantPool* constants = method()->constants();
217 constantTag tag = constants->tag_at(cp_index);
218
219 if (tag.is_int()) {
220 st->print_cr(" " INT32_FORMAT, constants->int_at(cp_index));
221 } else if (tag.is_long()) {
222 st->print_cr(" " INT64_FORMAT, (int64_t)(constants->long_at(cp_index)));
223 } else if (tag.is_float()) {
224 st->print_cr(" %f", constants->float_at(cp_index));
225 } else if (tag.is_double()) {
226 st->print_cr(" %f", constants->double_at(cp_index));
227 } else if (tag.is_string()) {
228 const char* string = constants->unresolved_string_at(cp_index)->as_quoted_ascii();
229 st->print_cr(" \"%s\"", string);
230 } else if (tag.is_klass()) {
231 st->print_cr(" %s", constants->resolved_klass_at(cp_index)->external_name());
232 } else if (tag.is_unresolved_klass()) {
233 st->print_cr(" %s", constants->klass_at_noresolve(cp_index)->as_quoted_ascii());
234 } else if (tag.is_method_type()) {
235 int i2 = constants->method_type_index_at(cp_index);
236 st->print(" <MethodType> %d", i2);
237 st->print_cr(" %s", constants->symbol_at(i2)->as_quoted_ascii());
238 } else if (tag.is_method_handle()) {
239 int kind = constants->method_handle_ref_kind_at(cp_index);
240 int i2 = constants->method_handle_index_at(cp_index);
241 st->print(" <MethodHandle of kind %d index at %d>", kind, i2);
242 print_field_or_method(i2, st);
243 } else if (tag.is_dynamic_constant()) {
244 print_dynamic(cp_index, st);
245 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_DYNAMIC)) {
246 print_bsm(cp_index, st);
247 }
248 } else {
249 st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
250 }
251 }
252
253 // Fieldref, Methodref, or InterfaceMethodref
254 void BytecodePrinter::print_field_or_method(int cp_index, outputStream* st) {
255 ConstantPool* constants = method()->constants();
256 constantTag tag = constants->tag_at(cp_index);
257
258 switch (tag.value()) {
259 case JVM_CONSTANT_Fieldref:
260 case JVM_CONSTANT_Methodref:
261 case JVM_CONSTANT_InterfaceMethodref:
262 break;
263 default:
264 st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
265 return;
266 }
267
268 Symbol* name = constants->uncached_name_ref_at(cp_index);
269 Symbol* signature = constants->uncached_signature_ref_at(cp_index);
270 Symbol* klass = constants->klass_name_at(constants->uncached_klass_ref_index_at(cp_index));
271 const char* sep = (tag.is_field() ? ":" : "");
272 st->print_cr(" %d <%s.%s%s%s> ", cp_index, klass->as_C_string(), name->as_C_string(), sep, signature->as_C_string());
273 }
274
275 // JVM_CONSTANT_Dynamic or JVM_CONSTANT_InvokeDynamic
276 void BytecodePrinter::print_dynamic(int cp_index, outputStream* st) {
277 ConstantPool* constants = method()->constants();
278 constantTag tag = constants->tag_at(cp_index);
279
280 switch (tag.value()) {
281 case JVM_CONSTANT_Dynamic:
282 case JVM_CONSTANT_InvokeDynamic:
283 break;
284 default:
285 st->print_cr(" bad tag=%d at %d", tag.value(), cp_index);
286 return;
287 }
288
289 int bsm = constants->bootstrap_method_ref_index_at(cp_index);
290 st->print(" bsm=%d", bsm);
291
292 Symbol* name = constants->uncached_name_ref_at(cp_index);
293 Symbol* signature = constants->uncached_signature_ref_at(cp_index);
294 const char* sep = tag.is_dynamic_constant() ? ":" : "";
295 st->print_cr(" %d <%s%s%s>", cp_index, name->as_C_string(), sep, signature->as_C_string());
296 }
297
298 void BytecodePrinter::print_invokedynamic(int indy_index, int cp_index, outputStream* st) {
299 print_dynamic(cp_index, st);
300
301 if (ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_DYNAMIC)) {
302 print_bsm(cp_index, st);
303
304 if (is_linked()) {
305 ResolvedIndyEntry* indy_entry = constants()->resolved_indy_entry_at(indy_index);
306 st->print(" ResolvedIndyEntry: ");
307 indy_entry->print_on(st);
308 if (indy_entry->has_appendix()) {
309 oop apx = constants()->resolved_reference_from_indy(indy_index);
310 //FIXME: lock out of order with runtime/interpreter/BytecodeTracerTest.java
311 //int perm_index = HeapShared::get_archived_object_permanent_index(apx);
312 st->print_cr(" - appendix = " INTPTR_FORMAT, p2i(apx));
313 }
314 }
315 }
316 }
317
318 // cp_index: must be the cp_index of a JVM_CONSTANT_{Dynamic, DynamicInError, InvokeDynamic}
319 void BytecodePrinter::print_bsm(int cp_index, outputStream* st) {
320 assert(constants()->tag_at(cp_index).has_bootstrap(), "must be");
321 int bsm = constants()->bootstrap_method_ref_index_at(cp_index);
322 const char* ref_kind = "";
323 switch (constants()->method_handle_ref_kind_at(bsm)) {
324 case JVM_REF_getField : ref_kind = "REF_getField"; break;
325 case JVM_REF_getStatic : ref_kind = "REF_getStatic"; break;
326 case JVM_REF_putField : ref_kind = "REF_putField"; break;
327 case JVM_REF_putStatic : ref_kind = "REF_putStatic"; break;
328 case JVM_REF_invokeVirtual : ref_kind = "REF_invokeVirtual"; break;
329 case JVM_REF_invokeStatic : ref_kind = "REF_invokeStatic"; break;
330 case JVM_REF_invokeSpecial : ref_kind = "REF_invokeSpecial"; break;
331 case JVM_REF_newInvokeSpecial : ref_kind = "REF_newInvokeSpecial"; break;
332 case JVM_REF_invokeInterface : ref_kind = "REF_invokeInterface"; break;
333 default : ShouldNotReachHere();
334 }
335 st->print(" BSM: %s", ref_kind);
336 print_field_or_method(constants()->method_handle_index_at(bsm), st);
337 int argc = constants()->bootstrap_argument_count_at(cp_index);
338 st->print(" arguments[%d] = {", argc);
339 if (argc > 0) {
340 st->cr();
341 for (int arg_i = 0; arg_i < argc; arg_i++) {
342 int arg = constants()->bootstrap_argument_index_at(cp_index, arg_i);
343 st->print(" ");
344 print_constant(arg, st);
345 }
346 }
347 st->print_cr(" }");
348 }
349
350 void BytecodePrinter::print_attributes(int bci, outputStream* st) {
351 // Show attributes of pre-rewritten codes
352 Bytecodes::Code code = Bytecodes::java_code(raw_code());
353 // If the code doesn't have any fields there's nothing to print.
354 // note this is ==1 because the tableswitch and lookupswitch are
355 // zero size (for some reason) and we want to print stuff out for them.
356 // Also skip this if we're truncating bytecode output
357 if (TraceBytecodesTruncated || Bytecodes::length_for(code) == 1) {
358 st->cr();
359 return;
360 }
361
362 switch(code) {
363 // Java specific bytecodes only matter.
364 case Bytecodes::_bipush:
365 st->print_cr(" " INT32_FORMAT, get_byte());
366 break;
367 case Bytecodes::_sipush:
368 st->print_cr(" " INT32_FORMAT, get_short());
369 break;
370 case Bytecodes::_ldc:
371 {
372 int cp_index;
373 if (Bytecodes::uses_cp_cache(raw_code())) {
374 assert(is_linked(), "fast ldc bytecode must be in linked classes");
375 int obj_index = get_index_u1();
376 cp_index = constants()->object_to_cp_index(obj_index);
377 } else {
378 cp_index = get_index_u1();
379 }
380 print_constant(cp_index, st);
381 }
382 break;
383
384 case Bytecodes::_ldc_w:
385 case Bytecodes::_ldc2_w:
386 {
387 int cp_index;
388 if (Bytecodes::uses_cp_cache(raw_code())) {
389 assert(is_linked(), "fast ldc bytecode must be in linked classes");
390 int obj_index = get_native_index_u2();
391 cp_index = constants()->object_to_cp_index(obj_index);
392 } else {
393 cp_index = get_Java_index_u2();
394 }
395 print_constant(cp_index, st);
396 }
397 break;
398
399 case Bytecodes::_iload:
400 case Bytecodes::_lload:
401 case Bytecodes::_fload:
402 case Bytecodes::_dload:
403 case Bytecodes::_aload:
404 case Bytecodes::_istore:
405 case Bytecodes::_lstore:
406 case Bytecodes::_fstore:
407 case Bytecodes::_dstore:
408 case Bytecodes::_astore:
409 st->print_cr(" #%d", get_index_special());
410 break;
411
412 case Bytecodes::_iinc:
413 { int index = get_index_special();
414 jint offset = is_wide() ? get_short(): get_byte();
415 st->print_cr(" #%d " INT32_FORMAT, index, offset);
416 }
417 break;
418
419 case Bytecodes::_newarray: {
420 BasicType atype = (BasicType)get_index_u1();
421 const char* str = type2name(atype);
422 if (str == nullptr || is_reference_type(atype)) {
423 assert(false, "Unidentified basic type");
424 }
425 st->print_cr(" %s", str);
426 }
427 break;
428 case Bytecodes::_anewarray: {
429 int klass_index = get_Java_index_u2();
430 ConstantPool* constants = method()->constants();
431 Symbol* name = constants->klass_name_at(klass_index);
432 st->print_cr(" %s ", name->as_C_string());
433 }
434 break;
435 case Bytecodes::_multianewarray: {
436 int klass_index = get_Java_index_u2();
437 int nof_dims = get_index_u1();
438 ConstantPool* constants = method()->constants();
439 Symbol* name = constants->klass_name_at(klass_index);
440 st->print_cr(" %s %d", name->as_C_string(), nof_dims);
441 }
442 break;
443
444 case Bytecodes::_ifeq:
445 case Bytecodes::_ifnull:
446 case Bytecodes::_iflt:
447 case Bytecodes::_ifle:
448 case Bytecodes::_ifne:
449 case Bytecodes::_ifnonnull:
450 case Bytecodes::_ifgt:
451 case Bytecodes::_ifge:
452 case Bytecodes::_if_icmpeq:
453 case Bytecodes::_if_icmpne:
454 case Bytecodes::_if_icmplt:
455 case Bytecodes::_if_icmpgt:
456 case Bytecodes::_if_icmple:
457 case Bytecodes::_if_icmpge:
458 case Bytecodes::_if_acmpeq:
459 case Bytecodes::_if_acmpne:
460 case Bytecodes::_goto:
461 case Bytecodes::_jsr:
462 st->print_cr(" %d", bci + get_short());
463 break;
464
465 case Bytecodes::_goto_w:
466 case Bytecodes::_jsr_w:
467 st->print_cr(" %d", bci + get_int());
468 break;
469
470 case Bytecodes::_ret: st->print_cr(" %d", get_index_special()); break;
471
472 case Bytecodes::_tableswitch:
473 { align();
474 int default_dest = bci + get_int();
475 int lo = get_int();
476 int hi = get_int();
477 int len = hi - lo + 1;
478 jint* dest = NEW_RESOURCE_ARRAY(jint, len);
479 for (int i = 0; i < len; i++) {
480 dest[i] = bci + get_int();
481 }
482 st->print(" %d " INT32_FORMAT " " INT32_FORMAT " ",
483 default_dest, lo, hi);
484 const char *comma = "";
485 for (int ll = lo; ll <= hi; ll++) {
486 int idx = ll - lo;
487 st->print("%s %d:" INT32_FORMAT " (delta: %d)", comma, ll, dest[idx], dest[idx]-bci);
488 comma = ",";
489 }
490 st->cr();
491 }
492 break;
493 case Bytecodes::_lookupswitch:
494 { align();
495 int default_dest = bci + get_int();
496 int len = get_int();
497 jint* key = NEW_RESOURCE_ARRAY(jint, len);
498 jint* dest = NEW_RESOURCE_ARRAY(jint, len);
499 for (int i = 0; i < len; i++) {
500 key [i] = get_int();
501 dest[i] = bci + get_int();
502 };
503 st->print(" %d %d ", default_dest, len);
504 const char *comma = "";
505 for (int ll = 0; ll < len; ll++) {
506 st->print("%s " INT32_FORMAT ":" INT32_FORMAT, comma, key[ll], dest[ll]);
507 comma = ",";
508 }
509 st->cr();
510 }
511 break;
512
513 case Bytecodes::_putstatic:
514 case Bytecodes::_getstatic:
515 case Bytecodes::_putfield:
516 case Bytecodes::_getfield:
517 {
518 int cp_index;
519 if (is_linked()) {
520 int field_index = get_native_index_u2();
521 cp_index = cpcache()->resolved_field_entry_at(field_index)->constant_pool_index();
522 } else {
523 cp_index = get_Java_index_u2();
524 }
525 print_field_or_method(cp_index, st);
526 }
527 break;
528
529 case Bytecodes::_invokevirtual:
530 case Bytecodes::_invokespecial:
531 case Bytecodes::_invokestatic:
532 {
533 int cp_index;
534 if (is_linked()) {
535 int method_index = get_native_index_u2();
536 ResolvedMethodEntry* method_entry = cpcache()->resolved_method_entry_at(method_index);
537 cp_index = method_entry->constant_pool_index();
538 print_field_or_method(cp_index, st);
539
540 if (raw_code() == Bytecodes::_invokehandle &&
541 ClassPrinter::has_mode(_flags, ClassPrinter::PRINT_METHOD_HANDLE)) {
542 assert(is_linked(), "invokehandle is only in rewritten methods");
543 method_entry->print_on(st);
544 if (method_entry->has_appendix()) {
545 st->print(" appendix: ");
546 constants()->resolved_reference_from_method(method_index)->print_on(st);
547 }
548 }
549 } else {
550 cp_index = get_Java_index_u2();
551 print_field_or_method(cp_index, st);
552 }
553 }
554 break;
555
556 case Bytecodes::_invokeinterface:
557 {
558 int cp_index;
559 if (is_linked()) {
560 int method_index = get_native_index_u2();
561 cp_index = cpcache()->resolved_method_entry_at(method_index)->constant_pool_index();
562 } else {
563 cp_index = get_Java_index_u2();
564 }
565 int count = get_index_u1(); // TODO: this is not printed.
566 get_byte(); // ignore zero byte
567 print_field_or_method(cp_index, st);
568 }
569 break;
570
571 case Bytecodes::_invokedynamic:
572 {
573 int indy_index;
574 int cp_index;
575 if (is_linked()) {
576 indy_index = get_native_index_u4();
577 cp_index = constants()->resolved_indy_entry_at(indy_index)->constant_pool_index();
578 } else {
579 indy_index = -1;
580 cp_index = get_Java_index_u2();
581 get_byte(); // ignore zero byte
582 get_byte(); // ignore zero byte
583 }
584 print_invokedynamic(indy_index, cp_index, st);
585 }
586 break;
587
588 case Bytecodes::_new:
589 case Bytecodes::_checkcast:
590 case Bytecodes::_instanceof:
591 { int i = get_Java_index_u2();
592 ConstantPool* constants = method()->constants();
593 Symbol* name = constants->klass_name_at(i);
594 st->print_cr(" %d <%s>", i, name->as_C_string());
595 }
596 break;
597
598 case Bytecodes::_wide:
599 // length is zero not one, but printed with no more info.
600 break;
601
602 default:
603 ShouldNotReachHere();
604 break;
605 }
606 }
607
608
609 void BytecodePrinter::bytecode_epilog(int bci, outputStream* st) {
610 MethodData* mdo = method()->method_data();
611 if (mdo != nullptr) {
612
613 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
614 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
615
616 ProfileData* data = mdo->bci_to_data(bci);
617 if (data != nullptr) {
618 st->print(" %d ", mdo->dp_to_di(data->dp()));
619 st->fill_to(7);
620 data->print_data_on(st, mdo);
621 }
622 }
623 }