1 /*
   2  * Copyright (c) 2008, 2016, 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/javaClasses.hpp"
  27 #include "code/codeCache.hpp"
  28 #include "compiler/disassembler.hpp"
  29 #include "gc/shared/cardTableModRefBS.hpp"
  30 #include "gc/shared/collectedHeap.hpp"
  31 #include "memory/resourceArea.hpp"
  32 #include "oops/oop.inline.hpp"
  33 #include "runtime/fprofiler.hpp"
  34 #include "runtime/handles.inline.hpp"
  35 #include "runtime/os.hpp"
  36 #include "runtime/stubCodeGenerator.hpp"
  37 #include "runtime/stubRoutines.hpp"
  38 #ifdef TARGET_ARCH_x86
  39 # include "depChecker_x86.hpp"
  40 #endif
  41 #ifdef TARGET_ARCH_sparc
  42 # include "depChecker_sparc.hpp"
  43 #endif
  44 #ifdef TARGET_ARCH_zero
  45 # include "depChecker_zero.hpp"
  46 #endif
  47 #ifdef TARGET_ARCH_arm
  48 # include "depChecker_arm.hpp"
  49 #endif
  50 #ifdef TARGET_ARCH_ppc
  51 # include "depChecker_ppc.hpp"
  52 #endif
  53 #ifdef TARGET_ARCH_aarch64
  54 # include "depChecker_aarch64.hpp"
  55 #endif
  56 #ifdef SHARK
  57 #include "shark/sharkEntry.hpp"
  58 #endif
  59 
  60 void*       Disassembler::_library               = NULL;
  61 bool        Disassembler::_tried_to_load_library = false;
  62 
  63 // This routine is in the shared library:
  64 Disassembler::decode_func_virtual Disassembler::_decode_instructions_virtual = NULL;
  65 Disassembler::decode_func Disassembler::_decode_instructions = NULL;
  66 
  67 static const char hsdis_library_name[] = "hsdis-" HOTSPOT_LIB_ARCH;
  68 static const char decode_instructions_virtual_name[] = "decode_instructions_virtual";
  69 static const char decode_instructions_name[] = "decode_instructions";
  70 static bool use_new_version = true;
  71 #define COMMENT_COLUMN  40 LP64_ONLY(+8) /*could be an option*/
  72 #define BYTES_COMMENT   ";..."  /* funky byte display comment */
  73 
  74 bool Disassembler::load_library() {
  75   if (_decode_instructions_virtual != NULL || _decode_instructions != NULL) {
  76     // Already succeeded.
  77     return true;
  78   }
  79   if (_tried_to_load_library) {
  80     // Do not try twice.
  81     // To force retry in debugger: assign _tried_to_load_library=0
  82     return false;
  83   }
  84   // Try to load it.
  85   char ebuf[1024];
  86   char buf[JVM_MAXPATHLEN];
  87   os::jvm_path(buf, sizeof(buf));
  88   int jvm_offset = -1;
  89   int lib_offset = -1;
  90 #ifdef STATIC_BUILD
  91   char* p = strrchr(buf, '/');
  92   *p = '\0';
  93   strcat(p, "/lib/");
  94   lib_offset = jvm_offset = strlen(buf);
  95 #else
  96   {
  97     // Match "jvm[^/]*" in jvm_path.
  98     const char* base = buf;
  99     const char* p = strrchr(buf, *os::file_separator());
 100     if (p != NULL) lib_offset = p - base + 1;
 101     p = strstr(p ? p : base, "jvm");
 102     if (p != NULL) jvm_offset = p - base;
 103   }
 104 #endif
 105   // Find the disassembler shared library.
 106   // Search for several paths derived from libjvm, in this order:
 107   // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so  (for compatibility)
 108   // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so
 109   // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so
 110   // 4. hsdis-<arch>.so  (using LD_LIBRARY_PATH)
 111   if (jvm_offset >= 0) {
 112     // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so
 113     strcpy(&buf[jvm_offset], hsdis_library_name);
 114     strcat(&buf[jvm_offset], os::dll_file_extension());
 115     _library = os::dll_load(buf, ebuf, sizeof ebuf);
 116     if (_library == NULL && lib_offset >= 0) {
 117       // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so
 118       strcpy(&buf[lib_offset], hsdis_library_name);
 119       strcat(&buf[lib_offset], os::dll_file_extension());
 120       _library = os::dll_load(buf, ebuf, sizeof ebuf);
 121     }
 122     if (_library == NULL && lib_offset > 0) {
 123       // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so
 124       buf[lib_offset - 1] = '\0';
 125       const char* p = strrchr(buf, *os::file_separator());
 126       if (p != NULL) {
 127         lib_offset = p - buf + 1;
 128         strcpy(&buf[lib_offset], hsdis_library_name);
 129         strcat(&buf[lib_offset], os::dll_file_extension());
 130         _library = os::dll_load(buf, ebuf, sizeof ebuf);
 131       }
 132     }
 133   }
 134   if (_library == NULL) {
 135     // 4. hsdis-<arch>.so  (using LD_LIBRARY_PATH)
 136     strcpy(&buf[0], hsdis_library_name);
 137     strcat(&buf[0], os::dll_file_extension());
 138     _library = os::dll_load(buf, ebuf, sizeof ebuf);
 139   }
 140   if (_library != NULL) {
 141     _decode_instructions_virtual = CAST_TO_FN_PTR(Disassembler::decode_func_virtual,
 142                                           os::dll_lookup(_library, decode_instructions_virtual_name));
 143   }
 144   if (_decode_instructions_virtual == NULL) {
 145     // could not spot in new version, try old version
 146     _decode_instructions = CAST_TO_FN_PTR(Disassembler::decode_func,
 147                                           os::dll_lookup(_library, decode_instructions_name));
 148     use_new_version = false;
 149   } else {
 150     use_new_version = true;
 151   }
 152   _tried_to_load_library = true;
 153   if (_decode_instructions_virtual == NULL && _decode_instructions == NULL) {
 154     tty->print_cr("Could not load %s; %s; %s", buf,
 155                   ((_library != NULL)
 156                    ? "entry point is missing"
 157                    : (WizardMode || PrintMiscellaneous)
 158                    ? (const char*)ebuf
 159                    : "library not loadable"),
 160                   "PrintAssembly is disabled");
 161     return false;
 162   }
 163 
 164   // Success.
 165   tty->print_cr("Loaded disassembler from %s", buf);
 166   return true;
 167 }
 168 
 169 
 170 class decode_env {
 171  private:
 172   nmethod*      _nm;
 173   CodeBlob*     _code;
 174   CodeStrings   _strings;
 175   outputStream* _output;
 176   address       _start, _end;
 177 
 178   char          _option_buf[512];
 179   char          _print_raw;
 180   bool          _print_pc;
 181   bool          _print_bytes;
 182   address       _cur_insn;
 183   int           _total_ticks;
 184   int           _bytes_per_line; // arch-specific formatting option
 185 
 186   static bool match(const char* event, const char* tag) {
 187     size_t taglen = strlen(tag);
 188     if (strncmp(event, tag, taglen) != 0)
 189       return false;
 190     char delim = event[taglen];
 191     return delim == '\0' || delim == ' ' || delim == '/' || delim == '=';
 192   }
 193 
 194   void collect_options(const char* p) {
 195     if (p == NULL || p[0] == '\0')  return;
 196     size_t opt_so_far = strlen(_option_buf);
 197     if (opt_so_far + 1 + strlen(p) + 1 > sizeof(_option_buf))  return;
 198     char* fillp = &_option_buf[opt_so_far];
 199     if (opt_so_far > 0) *fillp++ = ',';
 200     strcat(fillp, p);
 201     // replace white space by commas:
 202     char* q = fillp;
 203     while ((q = strpbrk(q, " \t\n")) != NULL)
 204       *q++ = ',';
 205     // Note that multiple PrintAssemblyOptions flags accumulate with \n,
 206     // which we want to be changed to a comma...
 207   }
 208 
 209   void print_insn_labels();
 210   void print_insn_bytes(address pc0, address pc);
 211   void print_address(address value);
 212 
 213  public:
 214   decode_env(CodeBlob* code, outputStream* output, CodeStrings c = CodeStrings());
 215 
 216   address decode_instructions(address start, address end);
 217 
 218   void start_insn(address pc) {
 219     _cur_insn = pc;
 220     output()->bol();
 221     print_insn_labels();
 222   }
 223 
 224   void end_insn(address pc) {
 225     address pc0 = cur_insn();
 226     outputStream* st = output();
 227     if (_print_bytes && pc > pc0)
 228       print_insn_bytes(pc0, pc);
 229     if (_nm != NULL) {
 230       _nm->print_code_comment_on(st, COMMENT_COLUMN, pc0, pc);
 231       // this calls reloc_string_for which calls oop::print_value_on
 232     }
 233 
 234     // Output pc bucket ticks if we have any
 235     if (total_ticks() != 0) {
 236       address bucket_pc = FlatProfiler::bucket_start_for(pc);
 237       if (bucket_pc != NULL && bucket_pc > pc0 && bucket_pc <= pc) {
 238         int bucket_count = FlatProfiler::bucket_count_for(pc0);
 239         if (bucket_count != 0) {
 240           st->bol();
 241           st->print_cr("%3.1f%% [%d]", bucket_count*100.0/total_ticks(), bucket_count);
 242         }
 243       }
 244     }
 245     // follow each complete insn by a nice newline
 246     st->cr();
 247   }
 248 
 249   address handle_event(const char* event, address arg);
 250 
 251   outputStream* output() { return _output; }
 252   address cur_insn() { return _cur_insn; }
 253   int total_ticks() { return _total_ticks; }
 254   void set_total_ticks(int n) { _total_ticks = n; }
 255   const char* options() { return _option_buf; }
 256 };
 257 
 258 decode_env::decode_env(CodeBlob* code, outputStream* output, CodeStrings c) {
 259   memset(this, 0, sizeof(*this)); // Beware, this zeroes bits of fields.
 260   _output = output ? output : tty;
 261   _code = code;
 262   if (code != NULL && code->is_nmethod())
 263     _nm = (nmethod*) code;
 264   _strings.copy(c);
 265 
 266   // by default, output pc but not bytes:
 267   _print_pc       = true;
 268   _print_bytes    = false;
 269   _bytes_per_line = Disassembler::pd_instruction_alignment();
 270 
 271   // parse the global option string:
 272   collect_options(Disassembler::pd_cpu_opts());
 273   collect_options(PrintAssemblyOptions);
 274 
 275   if (strstr(options(), "hsdis-")) {
 276     if (strstr(options(), "hsdis-print-raw"))
 277       _print_raw = (strstr(options(), "xml") ? 2 : 1);
 278     if (strstr(options(), "hsdis-print-pc"))
 279       _print_pc = !_print_pc;
 280     if (strstr(options(), "hsdis-print-bytes"))
 281       _print_bytes = !_print_bytes;
 282   }
 283   if (strstr(options(), "help")) {
 284     tty->print_cr("PrintAssemblyOptions help:");
 285     tty->print_cr("  hsdis-print-raw       test plugin by requesting raw output");
 286     tty->print_cr("  hsdis-print-raw-xml   test plugin by requesting raw xml");
 287     tty->print_cr("  hsdis-print-pc        turn off PC printing (on by default)");
 288     tty->print_cr("  hsdis-print-bytes     turn on instruction byte output");
 289     tty->print_cr("combined options: %s", options());
 290   }
 291 }
 292 
 293 address decode_env::handle_event(const char* event, address arg) {
 294   if (match(event, "insn")) {
 295     start_insn(arg);
 296   } else if (match(event, "/insn")) {
 297     end_insn(arg);
 298   } else if (match(event, "addr")) {
 299     if (arg != NULL) {
 300       print_address(arg);
 301       return arg;
 302     }
 303   } else if (match(event, "mach")) {
 304     static char buffer[32] = { 0, };
 305     if (strcmp(buffer, (const char*)arg) != 0 ||
 306         strlen((const char*)arg) > sizeof(buffer) - 1) {
 307       // Only print this when the mach changes
 308       strncpy(buffer, (const char*)arg, sizeof(buffer) - 1);
 309       buffer[sizeof(buffer) - 1] = '\0';
 310       output()->print_cr("[Disassembling for mach='%s']", arg);
 311     }
 312   } else if (match(event, "format bytes-per-line")) {
 313     _bytes_per_line = (int) (intptr_t) arg;
 314   } else {
 315     // ignore unrecognized markup
 316   }
 317   return NULL;
 318 }
 319 
 320 // called by the disassembler to print out jump targets and data addresses
 321 void decode_env::print_address(address adr) {
 322   outputStream* st = _output;
 323 
 324   if (adr == NULL) {
 325     st->print("NULL");
 326     return;
 327   }
 328 
 329   int small_num = (int)(intptr_t)adr;
 330   if ((intptr_t)adr == (intptr_t)small_num
 331       && -1 <= small_num && small_num <= 9) {
 332     st->print("%d", small_num);
 333     return;
 334   }
 335 
 336   if (Universe::is_fully_initialized()) {
 337     if (StubRoutines::contains(adr)) {
 338       StubCodeDesc* desc = StubCodeDesc::desc_for(adr);
 339       if (desc == NULL) {
 340         desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset);
 341       }
 342       if (desc != NULL) {
 343         st->print("Stub::%s", desc->name());
 344         if (desc->begin() != adr) {
 345           st->print(INTX_FORMAT_W(+) " " PTR_FORMAT, adr - desc->begin(), p2i(adr));
 346         } else if (WizardMode) {
 347           st->print(" " PTR_FORMAT, p2i(adr));
 348         }
 349         return;
 350       }
 351       st->print("Stub::<unknown> " PTR_FORMAT, p2i(adr));
 352       return;
 353     }
 354 
 355     BarrierSet* bs = Universe::heap()->barrier_set();
 356     if (bs->is_a(BarrierSet::CardTableModRef) &&
 357         adr == (address)(barrier_set_cast<CardTableModRefBS>(bs)->byte_map_base)) {
 358       st->print("word_map_base");
 359       if (WizardMode) st->print(" " INTPTR_FORMAT, p2i(adr));
 360       return;
 361     }
 362   }
 363 
 364   if (_nm == NULL) {
 365     // Don't do this for native methods, as the function name will be printed in
 366     // nmethod::reloc_string_for().
 367     ResourceMark rm;
 368     const int buflen = 1024;
 369     char* buf = NEW_RESOURCE_ARRAY(char, buflen);
 370     int offset;
 371     if (os::dll_address_to_function_name(adr, buf, buflen, &offset)) {
 372       st->print(PTR_FORMAT " = %s",  p2i(adr), buf);
 373       if (offset != 0) {
 374         st->print("+%d", offset);
 375       }
 376       return;
 377     }
 378   }
 379 
 380   // Fall through to a simple (hexadecimal) numeral.
 381   st->print(PTR_FORMAT, p2i(adr));
 382 }
 383 
 384 void decode_env::print_insn_labels() {
 385   address p = cur_insn();
 386   outputStream* st = output();
 387   CodeBlob* cb = _code;
 388   if (cb != NULL) {
 389     cb->print_block_comment(st, p);
 390   }
 391   _strings.print_block_comment(st, (intptr_t)(p - _start));
 392   if (_print_pc) {
 393     st->print("  " PTR_FORMAT ": ", p2i(p));
 394   }
 395 }
 396 
 397 void decode_env::print_insn_bytes(address pc, address pc_limit) {
 398   outputStream* st = output();
 399   size_t incr = 1;
 400   size_t perline = _bytes_per_line;
 401   if ((size_t) Disassembler::pd_instruction_alignment() >= sizeof(int)
 402       && !((uintptr_t)pc % sizeof(int))
 403       && !((uintptr_t)pc_limit % sizeof(int))) {
 404     incr = sizeof(int);
 405     if (perline % incr)  perline += incr - (perline % incr);
 406   }
 407   while (pc < pc_limit) {
 408     // tab to the desired column:
 409     st->move_to(COMMENT_COLUMN);
 410     address pc0 = pc;
 411     address pc1 = pc + perline;
 412     if (pc1 > pc_limit)  pc1 = pc_limit;
 413     for (; pc < pc1; pc += incr) {
 414       if (pc == pc0) {
 415         st->print(BYTES_COMMENT);
 416       } else if ((uint)(pc - pc0) % sizeof(int) == 0) {
 417         st->print(" ");         // put out a space on word boundaries
 418       }
 419       if (incr == sizeof(int)) {
 420         st->print("%08x", *(int*)pc);
 421       } else {
 422         st->print("%02x", (*pc)&0xFF);
 423       }
 424     }
 425     st->cr();
 426   }
 427 }
 428 
 429 
 430 static void* event_to_env(void* env_pv, const char* event, void* arg) {
 431   decode_env* env = (decode_env*) env_pv;
 432   return env->handle_event(event, (address) arg);
 433 }
 434 
 435 ATTRIBUTE_PRINTF(2, 3)
 436 static int printf_to_env(void* env_pv, const char* format, ...) {
 437   decode_env* env = (decode_env*) env_pv;
 438   outputStream* st = env->output();
 439   size_t flen = strlen(format);
 440   const char* raw = NULL;
 441   if (flen == 0)  return 0;
 442   if (flen == 1 && format[0] == '\n') { st->bol(); return 1; }
 443   if (flen < 2 ||
 444       strchr(format, '%') == NULL) {
 445     raw = format;
 446   } else if (format[0] == '%' && format[1] == '%' &&
 447              strchr(format+2, '%') == NULL) {
 448     // happens a lot on machines with names like %foo
 449     flen--;
 450     raw = format+1;
 451   }
 452   if (raw != NULL) {
 453     st->print_raw(raw, (int) flen);
 454     return (int) flen;
 455   }
 456   va_list ap;
 457   va_start(ap, format);
 458   julong cnt0 = st->count();
 459   st->vprint(format, ap);
 460   julong cnt1 = st->count();
 461   va_end(ap);
 462   return (int)(cnt1 - cnt0);
 463 }
 464 
 465 address decode_env::decode_instructions(address start, address end) {
 466   _start = start; _end = end;
 467 
 468   assert(((((intptr_t)start | (intptr_t)end) % Disassembler::pd_instruction_alignment()) == 0), "misaligned insn addr");
 469 
 470   const int show_bytes = false; // for disassembler debugging
 471 
 472   //_version = Disassembler::pd_cpu_version();
 473 
 474   if (!Disassembler::can_decode()) {
 475     return NULL;
 476   }
 477 
 478   // decode a series of instructions and return the end of the last instruction
 479 
 480   if (_print_raw) {
 481     // Print whatever the library wants to print, w/o fancy callbacks.
 482     // This is mainly for debugging the library itself.
 483     FILE* out = stdout;
 484     FILE* xmlout = (_print_raw > 1 ? out : NULL);
 485     return use_new_version ?
 486       (address)
 487       (*Disassembler::_decode_instructions_virtual)((uintptr_t)start, (uintptr_t)end,
 488                                                     start, end - start,
 489                                                     NULL, (void*) xmlout,
 490                                                     NULL, (void*) out,
 491                                                     options(), 0/*nice new line*/)
 492       :
 493       (address)
 494       (*Disassembler::_decode_instructions)(start, end,
 495                                             NULL, (void*) xmlout,
 496                                             NULL, (void*) out,
 497                                             options());
 498   }
 499 
 500   return use_new_version ?
 501     (address)
 502     (*Disassembler::_decode_instructions_virtual)((uintptr_t)start, (uintptr_t)end,
 503                                                   start, end - start,
 504                                                   &event_to_env,  (void*) this,
 505                                                   &printf_to_env, (void*) this,
 506                                                   options(), 0/*nice new line*/)
 507     :
 508     (address)
 509     (*Disassembler::_decode_instructions)(start, end,
 510                                           &event_to_env,  (void*) this,
 511                                           &printf_to_env, (void*) this,
 512                                           options());
 513 }
 514 
 515 
 516 void Disassembler::decode(CodeBlob* cb, outputStream* st) {
 517   ttyLocker ttyl;
 518   if (!load_library())  return;
 519   if (cb->is_nmethod()) {
 520     decode((nmethod*)cb, st);
 521     return;
 522   }
 523   decode_env env(cb, st);
 524   env.output()->print_cr("----------------------------------------------------------------------");
 525   env.output()->print_cr("%s", cb->name());
 526   env.output()->print_cr(" at  [" PTR_FORMAT ", " PTR_FORMAT "]  " JLONG_FORMAT " bytes", p2i(cb->code_begin()), p2i(cb->code_end()), ((jlong)(cb->code_end() - cb->code_begin())) * sizeof(unsigned char*));
 527   env.decode_instructions(cb->code_begin(), cb->code_end());
 528 }
 529 
 530 void Disassembler::decode(address start, address end, outputStream* st, CodeStrings c) {
 531   ttyLocker ttyl;
 532   if (!load_library())  return;
 533   decode_env env(CodeCache::find_blob_unsafe(start), st, c);
 534   env.decode_instructions(start, end);
 535 }
 536 
 537 void Disassembler::decode(nmethod* nm, outputStream* st) {
 538   ttyLocker ttyl;
 539   if (!load_library())  return;
 540   decode_env env(nm, st);
 541   env.output()->print_cr("----------------------------------------------------------------------");
 542 
 543 #ifdef SHARK
 544   SharkEntry* entry = (SharkEntry *) nm->code_begin();
 545   unsigned char* p   = entry->code_start();
 546   unsigned char* end = entry->code_limit();
 547 #else
 548   unsigned char* p   = nm->code_begin();
 549   unsigned char* end = nm->code_end();
 550 #endif // SHARK
 551 
 552   nm->method()->method_holder()->name()->print_symbol_on(env.output());
 553   env.output()->print(".");
 554   nm->method()->name()->print_symbol_on(env.output());
 555   nm->method()->signature()->print_symbol_on(env.output());
 556 #if INCLUDE_JVMCI
 557   {
 558     char buffer[O_BUFLEN];
 559     char* jvmciName = nm->jvmci_installed_code_name(buffer, O_BUFLEN);
 560     if (jvmciName != NULL) {
 561       env.output()->print(" (%s)", jvmciName);
 562     }
 563   }
 564 #endif
 565   env.output()->print_cr("  [" PTR_FORMAT ", " PTR_FORMAT "]  " JLONG_FORMAT " bytes", p2i(p), p2i(end), ((jlong)(end - p)));
 566 
 567   // If there has been profiling, print the buckets.
 568   if (FlatProfiler::bucket_start_for(p) != NULL) {
 569     unsigned char* p1 = p;
 570     int total_bucket_count = 0;
 571     while (p1 < end) {
 572       unsigned char* p0 = p1;
 573       p1 += pd_instruction_alignment();
 574       address bucket_pc = FlatProfiler::bucket_start_for(p1);
 575       if (bucket_pc != NULL && bucket_pc > p0 && bucket_pc <= p1)
 576         total_bucket_count += FlatProfiler::bucket_count_for(p0);
 577     }
 578     env.set_total_ticks(total_bucket_count);
 579   }
 580 
 581   // Print constant table.
 582   if (nm->consts_size() > 0) {
 583     nm->print_nmethod_labels(env.output(), nm->consts_begin());
 584     int offset = 0;
 585     for (address p = nm->consts_begin(); p < nm->consts_end(); p += 4, offset += 4) {
 586       if ((offset % 8) == 0) {
 587         env.output()->print_cr("  " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT "   " PTR64_FORMAT, p2i(p), offset, *((int32_t*) p), *((int64_t*) p));
 588       } else {
 589         env.output()->print_cr("  " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT,                    p2i(p), offset, *((int32_t*) p));
 590       }
 591     }
 592   }
 593 
 594   env.decode_instructions(p, end);
 595 }