1 /* 2 * Copyright (c) 2008, 2019, 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 "asm/macroAssembler.hpp" 27 #include "ci/ciUtilities.hpp" 28 #include "classfile/javaClasses.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/disassembler.hpp" 31 #include "gc/shared/cardTable.hpp" 32 #include "gc/shared/cardTableBarrierSet.hpp" 33 #include "gc/shared/collectedHeap.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "runtime/handles.inline.hpp" 38 #include "runtime/os.inline.hpp" 39 #include "runtime/stubCodeGenerator.hpp" 40 #include "runtime/stubRoutines.hpp" 41 #include "utilities/resourceHash.hpp" 42 #include CPU_HEADER(depChecker) 43 44 void* Disassembler::_library = NULL; 45 bool Disassembler::_tried_to_load_library = false; 46 47 // This routine is in the shared library: 48 Disassembler::decode_func_virtual Disassembler::_decode_instructions_virtual = NULL; 49 Disassembler::decode_func Disassembler::_decode_instructions = NULL; 50 51 static const char hsdis_library_name[] = "hsdis-" HOTSPOT_LIB_ARCH; 52 static const char decode_instructions_virtual_name[] = "decode_instructions_virtual"; 53 static const char decode_instructions_name[] = "decode_instructions"; 54 static bool use_new_version = true; 55 #define COMMENT_COLUMN 52 LP64_ONLY(+8) /*could be an option*/ 56 #define BYTES_COMMENT ";..." /* funky byte display comment */ 57 58 bool Disassembler::load_library() { 59 if (_decode_instructions_virtual != NULL || _decode_instructions != NULL) { 60 // Already succeeded. 61 return true; 62 } 63 if (_tried_to_load_library) { 64 // Do not try twice. 65 // To force retry in debugger: assign _tried_to_load_library=0 66 return false; 67 } 68 // Try to load it. 69 char ebuf[1024]; 70 char buf[JVM_MAXPATHLEN]; 71 os::jvm_path(buf, sizeof(buf)); 72 int jvm_offset = -1; 73 int lib_offset = -1; 74 #ifdef STATIC_BUILD 75 char* p = strrchr(buf, '/'); 76 *p = '\0'; 77 strcat(p, "/lib/"); 78 lib_offset = jvm_offset = strlen(buf); 79 #else 80 { 81 // Match "jvm[^/]*" in jvm_path. 82 const char* base = buf; 83 const char* p = strrchr(buf, *os::file_separator()); 84 if (p != NULL) lib_offset = p - base + 1; 85 p = strstr(p ? p : base, "jvm"); 86 if (p != NULL) jvm_offset = p - base; 87 } 88 #endif 89 // Find the disassembler shared library. 90 // Search for several paths derived from libjvm, in this order: 91 // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so (for compatibility) 92 // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so 93 // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so 94 // 4. hsdis-<arch>.so (using LD_LIBRARY_PATH) 95 if (jvm_offset >= 0) { 96 // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so 97 strcpy(&buf[jvm_offset], hsdis_library_name); 98 strcat(&buf[jvm_offset], os::dll_file_extension()); 99 _library = os::dll_load(buf, ebuf, sizeof ebuf); 100 if (_library == NULL && lib_offset >= 0) { 101 // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so 102 strcpy(&buf[lib_offset], hsdis_library_name); 103 strcat(&buf[lib_offset], os::dll_file_extension()); 104 _library = os::dll_load(buf, ebuf, sizeof ebuf); 105 } 106 if (_library == NULL && lib_offset > 0) { 107 // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so 108 buf[lib_offset - 1] = '\0'; 109 const char* p = strrchr(buf, *os::file_separator()); 110 if (p != NULL) { 111 lib_offset = p - buf + 1; 112 strcpy(&buf[lib_offset], hsdis_library_name); 113 strcat(&buf[lib_offset], os::dll_file_extension()); 114 _library = os::dll_load(buf, ebuf, sizeof ebuf); 115 } 116 } 117 } 118 if (_library == NULL) { 119 // 4. hsdis-<arch>.so (using LD_LIBRARY_PATH) 120 strcpy(&buf[0], hsdis_library_name); 121 strcat(&buf[0], os::dll_file_extension()); 122 _library = os::dll_load(buf, ebuf, sizeof ebuf); 123 } 124 if (_library != NULL) { 125 _decode_instructions_virtual = CAST_TO_FN_PTR(Disassembler::decode_func_virtual, 126 os::dll_lookup(_library, decode_instructions_virtual_name)); 127 } 128 if (_decode_instructions_virtual == NULL && _library != NULL) { 129 // could not spot in new version, try old version 130 _decode_instructions = CAST_TO_FN_PTR(Disassembler::decode_func, 131 os::dll_lookup(_library, decode_instructions_name)); 132 use_new_version = false; 133 } else { 134 use_new_version = true; 135 } 136 _tried_to_load_library = true; 137 if (_decode_instructions_virtual == NULL && _decode_instructions == NULL) { 138 tty->print_cr("Could not load %s; %s; %s", buf, 139 ((_library != NULL) 140 ? "entry point is missing" 141 : (WizardMode || PrintMiscellaneous) 142 ? (const char*)ebuf 143 : "library not loadable"), 144 "PrintAssembly is disabled"); 145 return false; 146 } 147 148 // Success. 149 tty->print_cr("Loaded disassembler from %s", buf); 150 return true; 151 } 152 153 154 class decode_env { 155 private: 156 nmethod* _nm; 157 CodeBlob* _code; 158 CodeStrings _strings; 159 outputStream* _output; 160 address _start, _end; 161 ptrdiff_t _offset; 162 163 char _option_buf[512]; 164 char _print_raw; 165 bool _print_pc; 166 bool _print_bytes; 167 address _cur_insn; 168 int _bytes_per_line; // arch-specific formatting option 169 bool _print_file_name; 170 171 static bool match(const char* event, const char* tag) { 172 size_t taglen = strlen(tag); 173 if (strncmp(event, tag, taglen) != 0) 174 return false; 175 char delim = event[taglen]; 176 return delim == '\0' || delim == ' ' || delim == '/' || delim == '='; 177 } 178 179 void collect_options(const char* p) { 180 if (p == NULL || p[0] == '\0') return; 181 size_t opt_so_far = strlen(_option_buf); 182 if (opt_so_far + 1 + strlen(p) + 1 > sizeof(_option_buf)) return; 183 char* fillp = &_option_buf[opt_so_far]; 184 if (opt_so_far > 0) *fillp++ = ','; 185 strcat(fillp, p); 186 // replace white space by commas: 187 char* q = fillp; 188 while ((q = strpbrk(q, " \t\n")) != NULL) 189 *q++ = ','; 190 // Note that multiple PrintAssemblyOptions flags accumulate with \n, 191 // which we want to be changed to a comma... 192 } 193 194 void print_insn_labels(); 195 void print_insn_bytes(address pc0, address pc); 196 void print_address(address value); 197 198 struct SourceFileInfo { 199 struct Link : public CHeapObj<mtCode> { 200 const char* file; 201 int line; 202 Link* next; 203 Link(const char* f, int l) : file(f), line(l), next(NULL) {} 204 }; 205 Link *head, *tail; 206 207 static unsigned hash(const address& a) { 208 return primitive_hash<address>(a); 209 } 210 static bool equals(const address& a0, const address& a1) { 211 return primitive_equals<address>(a0, a1); 212 } 213 void append(const char* file, int line) { 214 if (tail != NULL && tail->file == file && tail->line == line) { 215 // Don't print duplicated lines at the same address. This could happen with C 216 // macros that end up having multiple "__" tokens on the same __LINE__. 217 return; 218 } 219 Link *link = new Link(file, line); 220 if (head == NULL) { 221 head = tail = link; 222 } else { 223 tail->next = link; 224 tail = link; 225 } 226 } 227 SourceFileInfo(const char* file, int line) : head(NULL), tail(NULL) { 228 append(file, line); 229 } 230 }; 231 232 typedef ResourceHashtable< 233 address, SourceFileInfo, 234 SourceFileInfo::hash, 235 SourceFileInfo::equals, 236 15889, // prime number 237 ResourceObj::C_HEAP> SourceFileInfoTable; 238 239 static SourceFileInfoTable _src_table; 240 static const char* _cached_src; 241 static GrowableArray<const char*>* _cached_src_lines; 242 243 public: 244 decode_env(CodeBlob* code, outputStream* output, 245 CodeStrings c = CodeStrings(), ptrdiff_t offset = 0); 246 247 address decode_instructions(address start, address end); 248 249 void start_insn(address pc) { 250 _cur_insn = pc; 251 output()->bol(); 252 print_insn_labels(); 253 } 254 255 void end_insn(address pc) { 256 address pc0 = cur_insn(); 257 outputStream* st = output(); 258 if (_print_bytes && pc > pc0) 259 print_insn_bytes(pc0, pc); 260 if (_nm != NULL) { 261 _nm->print_code_comment_on(st, COMMENT_COLUMN, pc0, pc); 262 // this calls reloc_string_for which calls oop::print_value_on 263 } 264 print_hook_comments(pc0, _nm != NULL); 265 // follow each complete insn by a nice newline 266 st->cr(); 267 } 268 269 address handle_event(const char* event, address arg); 270 271 outputStream* output() { return _output; } 272 address cur_insn() { return _cur_insn; } 273 const char* options() { return _option_buf; } 274 static void hook(const char* file, int line, address pc); 275 void print_hook_comments(address pc, bool newline); 276 }; 277 278 decode_env::SourceFileInfoTable decode_env::_src_table; 279 const char* decode_env::_cached_src = NULL; 280 GrowableArray<const char*>* decode_env::_cached_src_lines = NULL; 281 282 void decode_env::hook(const char* file, int line, address pc) { 283 // For simplication, we never free from this table. It's really not 284 // necessary as we add to the table only when PrintInterpreter is true, 285 // which means we are debugging the VM and a little bit of extra 286 // memory usage doesn't matter. 287 SourceFileInfo* found = _src_table.get(pc); 288 if (found != NULL) { 289 found->append(file, line); 290 } else { 291 SourceFileInfo sfi(file, line); 292 _src_table.put(pc, sfi); // sfi is copied by value 293 } 294 } 295 296 void decode_env::print_hook_comments(address pc, bool newline) { 297 SourceFileInfo* found = _src_table.get(pc); 298 outputStream* st = output(); 299 if (found != NULL) { 300 for (SourceFileInfo::Link *link = found->head; link; link = link->next) { 301 const char* file = link->file; 302 int line = link->line; 303 if (_cached_src == NULL || strcmp(_cached_src, file) != 0) { 304 FILE* fp; 305 306 // _cached_src_lines is a single cache of the lines of a source file, and we refill this cache 307 // every time we need to print a line from a different source file. It's not the fastest, 308 // but seems bearable. 309 if (_cached_src_lines != NULL) { 310 for (int i=0; i<_cached_src_lines->length(); i++) { 311 os::free((void*)_cached_src_lines->at(i)); 312 } 313 _cached_src_lines->clear(); 314 } else { 315 _cached_src_lines = new (ResourceObj::C_HEAP, mtCode)GrowableArray<const char*>(0, true); 316 } 317 318 if ((fp = fopen(file, "r")) == NULL) { 319 _cached_src = NULL; 320 return; 321 } 322 _cached_src = file; 323 324 char line[500]; // don't write lines that are too long in your source files! 325 while (fgets(line, sizeof(line), fp) != NULL) { 326 size_t len = strlen(line); 327 if (len > 0 && line[len-1] == '\n') { 328 line[len-1] = '\0'; 329 } 330 _cached_src_lines->append(os::strdup(line)); 331 } 332 fclose(fp); 333 _print_file_name = true; 334 } 335 336 if (_print_file_name) { 337 // We print the file name whenever we switch to a new file, or when 338 // Disassembler::decode is called to disassemble a new block of code. 339 _print_file_name = false; 340 if (newline) { 341 st->cr(); 342 } 343 st->move_to(COMMENT_COLUMN); 344 st->print(";;@FILE: %s", file); 345 newline = true; 346 } 347 348 int index = line - 1; // 1-based line number -> 0-based index. 349 if (index >= _cached_src_lines->length()) { 350 // This could happen if source file is mismatched. 351 } else { 352 const char* source_line = _cached_src_lines->at(index); 353 if (newline) { 354 st->cr(); 355 } 356 st->move_to(COMMENT_COLUMN); 357 st->print(";;%5d: %s", line, source_line); 358 newline = true; 359 } 360 } 361 } 362 } 363 364 decode_env::decode_env(CodeBlob* code, outputStream* output, CodeStrings c, 365 ptrdiff_t offset) : _nm(NULL), 366 _start(NULL), 367 _end(NULL), 368 _option_buf(), 369 _print_raw('\0'), 370 _cur_insn(NULL) { 371 _output = output ? output : tty; 372 _code = code; 373 if (code != NULL && code->is_nmethod()) 374 _nm = (nmethod*) code; 375 _strings.copy(c); 376 _offset = offset; 377 378 // by default, output pc but not bytes: 379 _print_pc = true; 380 _print_bytes = false; 381 _bytes_per_line = Disassembler::pd_instruction_alignment(); 382 _print_file_name= true; 383 384 // parse the global option string: 385 collect_options(Disassembler::pd_cpu_opts()); 386 collect_options(PrintAssemblyOptions); 387 388 if (strstr(options(), "hsdis-")) { 389 if (strstr(options(), "hsdis-print-raw")) 390 _print_raw = (strstr(options(), "xml") ? 2 : 1); 391 if (strstr(options(), "hsdis-print-pc")) 392 _print_pc = !_print_pc; 393 if (strstr(options(), "hsdis-print-bytes")) 394 _print_bytes = !_print_bytes; 395 } 396 if (strstr(options(), "help")) { 397 tty->print_cr("PrintAssemblyOptions help:"); 398 tty->print_cr(" hsdis-print-raw test plugin by requesting raw output"); 399 tty->print_cr(" hsdis-print-raw-xml test plugin by requesting raw xml"); 400 tty->print_cr(" hsdis-print-pc turn off PC printing (on by default)"); 401 tty->print_cr(" hsdis-print-bytes turn on instruction byte output"); 402 tty->print_cr("combined options: %s", options()); 403 } 404 } 405 406 address decode_env::handle_event(const char* event, address arg) { 407 if (match(event, "insn")) { 408 start_insn(arg); 409 } else if (match(event, "/insn")) { 410 end_insn(arg); 411 } else if (match(event, "addr")) { 412 if (arg != NULL) { 413 print_address(arg); 414 return arg; 415 } 416 } else if (match(event, "mach")) { 417 static char buffer[32] = { 0, }; 418 if (strcmp(buffer, (const char*)arg) != 0 || 419 strlen((const char*)arg) > sizeof(buffer) - 1) { 420 // Only print this when the mach changes 421 strncpy(buffer, (const char*)arg, sizeof(buffer) - 1); 422 buffer[sizeof(buffer) - 1] = '\0'; 423 output()->print_cr("[Disassembling for mach='%s']", arg); 424 } 425 } else if (match(event, "format bytes-per-line")) { 426 _bytes_per_line = (int) (intptr_t) arg; 427 } else { 428 // ignore unrecognized markup 429 } 430 return NULL; 431 } 432 433 // called by the disassembler to print out jump targets and data addresses 434 void decode_env::print_address(address adr) { 435 outputStream* st = _output; 436 437 if (adr == NULL) { 438 st->print("NULL"); 439 return; 440 } 441 442 int small_num = (int)(intptr_t)adr; 443 if ((intptr_t)adr == (intptr_t)small_num 444 && -1 <= small_num && small_num <= 9) { 445 st->print("%d", small_num); 446 return; 447 } 448 449 if (Universe::is_fully_initialized()) { 450 if (StubRoutines::contains(adr)) { 451 StubCodeDesc* desc = StubCodeDesc::desc_for(adr); 452 if (desc == NULL) { 453 desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset); 454 } 455 if (desc != NULL) { 456 st->print("Stub::%s", desc->name()); 457 if (desc->begin() != adr) { 458 st->print(INTX_FORMAT_W(+) " " PTR_FORMAT, adr - desc->begin(), p2i(adr)); 459 } else if (WizardMode) { 460 st->print(" " PTR_FORMAT, p2i(adr)); 461 } 462 return; 463 } 464 st->print("Stub::<unknown> " PTR_FORMAT, p2i(adr)); 465 return; 466 } 467 468 BarrierSet* bs = BarrierSet::barrier_set(); 469 if (bs->is_a(BarrierSet::CardTableBarrierSet) && 470 adr == ci_card_table_address_as<address>()) { 471 st->print("word_map_base"); 472 if (WizardMode) st->print(" " INTPTR_FORMAT, p2i(adr)); 473 return; 474 } 475 } 476 477 if (_nm == NULL) { 478 // Don't do this for native methods, as the function name will be printed in 479 // nmethod::reloc_string_for(). 480 ResourceMark rm; 481 const int buflen = 1024; 482 char* buf = NEW_RESOURCE_ARRAY(char, buflen); 483 int offset; 484 if (os::dll_address_to_function_name(adr, buf, buflen, &offset)) { 485 st->print(PTR_FORMAT " = %s", p2i(adr), buf); 486 if (offset != 0) { 487 st->print("+%d", offset); 488 } 489 return; 490 } 491 } 492 493 // Fall through to a simple (hexadecimal) numeral. 494 st->print(PTR_FORMAT, p2i(adr)); 495 } 496 497 void decode_env::print_insn_labels() { 498 address p = cur_insn(); 499 outputStream* st = output(); 500 CodeBlob* cb = _code; 501 if (cb != NULL) { 502 cb->print_block_comment(st, p); 503 } 504 _strings.print_block_comment(st, (intptr_t)(p - _start + _offset)); 505 if (_print_pc) { 506 st->print(" " PTR_FORMAT ": ", p2i(p)); 507 } 508 } 509 510 void decode_env::print_insn_bytes(address pc, address pc_limit) { 511 outputStream* st = output(); 512 size_t incr = 1; 513 size_t perline = _bytes_per_line; 514 if ((size_t) Disassembler::pd_instruction_alignment() >= sizeof(int) 515 && !((uintptr_t)pc % sizeof(int)) 516 && !((uintptr_t)pc_limit % sizeof(int))) { 517 incr = sizeof(int); 518 if (perline % incr) perline += incr - (perline % incr); 519 } 520 while (pc < pc_limit) { 521 // tab to the desired column: 522 st->move_to(COMMENT_COLUMN); 523 address pc0 = pc; 524 address pc1 = pc + perline; 525 if (pc1 > pc_limit) pc1 = pc_limit; 526 for (; pc < pc1; pc += incr) { 527 if (pc == pc0) { 528 st->print(BYTES_COMMENT); 529 } else if ((uint)(pc - pc0) % sizeof(int) == 0) { 530 st->print(" "); // put out a space on word boundaries 531 } 532 if (incr == sizeof(int)) { 533 st->print("%08x", *(int*)pc); 534 } else { 535 st->print("%02x", (*pc)&0xFF); 536 } 537 } 538 st->cr(); 539 } 540 } 541 542 543 static void* event_to_env(void* env_pv, const char* event, void* arg) { 544 decode_env* env = (decode_env*) env_pv; 545 return env->handle_event(event, (address) arg); 546 } 547 548 ATTRIBUTE_PRINTF(2, 3) 549 static int printf_to_env(void* env_pv, const char* format, ...) { 550 decode_env* env = (decode_env*) env_pv; 551 outputStream* st = env->output(); 552 size_t flen = strlen(format); 553 const char* raw = NULL; 554 if (flen == 0) return 0; 555 if (flen == 1 && format[0] == '\n') { st->bol(); return 1; } 556 if (flen < 2 || 557 strchr(format, '%') == NULL) { 558 raw = format; 559 } else if (format[0] == '%' && format[1] == '%' && 560 strchr(format+2, '%') == NULL) { 561 // happens a lot on machines with names like %foo 562 flen--; 563 raw = format+1; 564 } 565 if (raw != NULL) { 566 st->print_raw(raw, (int) flen); 567 return (int) flen; 568 } 569 va_list ap; 570 va_start(ap, format); 571 julong cnt0 = st->count(); 572 st->vprint(format, ap); 573 julong cnt1 = st->count(); 574 va_end(ap); 575 return (int)(cnt1 - cnt0); 576 } 577 578 address decode_env::decode_instructions(address start, address end) { 579 _start = start; _end = end; 580 581 assert(((((intptr_t)start | (intptr_t)end) % Disassembler::pd_instruction_alignment()) == 0), "misaligned insn addr"); 582 583 const int show_bytes = false; // for disassembler debugging 584 585 //_version = Disassembler::pd_cpu_version(); 586 587 if (!Disassembler::can_decode()) { 588 return NULL; 589 } 590 591 // decode a series of instructions and return the end of the last instruction 592 593 if (_print_raw) { 594 // Print whatever the library wants to print, w/o fancy callbacks. 595 // This is mainly for debugging the library itself. 596 FILE* out = stdout; 597 FILE* xmlout = (_print_raw > 1 ? out : NULL); 598 return use_new_version ? 599 (address) 600 (*Disassembler::_decode_instructions_virtual)((uintptr_t)start, (uintptr_t)end, 601 start, end - start, 602 NULL, (void*) xmlout, 603 NULL, (void*) out, 604 options(), 0/*nice new line*/) 605 : 606 (address) 607 (*Disassembler::_decode_instructions)(start, end, 608 NULL, (void*) xmlout, 609 NULL, (void*) out, 610 options()); 611 } 612 613 return use_new_version ? 614 (address) 615 (*Disassembler::_decode_instructions_virtual)((uintptr_t)start, (uintptr_t)end, 616 start, end - start, 617 &event_to_env, (void*) this, 618 &printf_to_env, (void*) this, 619 options(), 0/*nice new line*/) 620 : 621 (address) 622 (*Disassembler::_decode_instructions)(start, end, 623 &event_to_env, (void*) this, 624 &printf_to_env, (void*) this, 625 options()); 626 } 627 628 629 void Disassembler::decode(CodeBlob* cb, outputStream* st) { 630 ttyLocker ttyl; 631 if (!load_library()) return; 632 if (cb->is_nmethod()) { 633 decode((nmethod*)cb, st); 634 return; 635 } 636 decode_env env(cb, st); 637 env.output()->print_cr("----------------------------------------------------------------------"); 638 if (cb->is_aot()) { 639 env.output()->print("A "); 640 if (cb->is_compiled()) { 641 CompiledMethod* cm = (CompiledMethod*)cb; 642 env.output()->print("%d ",cm->compile_id()); 643 cm->method()->method_holder()->name()->print_symbol_on(env.output()); 644 env.output()->print("."); 645 cm->method()->name()->print_symbol_on(env.output()); 646 cm->method()->signature()->print_symbol_on(env.output()); 647 } else { 648 env.output()->print_cr("%s", cb->name()); 649 } 650 } else { 651 env.output()->print_cr("%s", cb->name()); 652 } 653 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*)); 654 env.decode_instructions(cb->code_begin(), cb->code_end()); 655 } 656 657 void Disassembler::decode(address start, address end, outputStream* st, CodeStrings c, 658 ptrdiff_t offset) { 659 ttyLocker ttyl; 660 if (!load_library()) return; 661 decode_env env(CodeCache::find_blob_unsafe(start), st, c, offset); 662 env.decode_instructions(start, end); 663 } 664 665 void Disassembler::decode(nmethod* nm, outputStream* st) { 666 ttyLocker ttyl; 667 if (!load_library()) return; 668 decode_env env(nm, st); 669 env.output()->print_cr("----------------------------------------------------------------------"); 670 671 unsigned char* p = nm->code_begin(); 672 unsigned char* end = nm->code_end(); 673 674 nm->method()->method_holder()->name()->print_symbol_on(env.output()); 675 env.output()->print("."); 676 nm->method()->name()->print_symbol_on(env.output()); 677 nm->method()->signature()->print_symbol_on(env.output()); 678 #if INCLUDE_JVMCI 679 { 680 const char* jvmciName = nm->jvmci_name(); 681 if (jvmciName != NULL) { 682 env.output()->print(" (%s)", jvmciName); 683 } 684 } 685 #endif 686 env.output()->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT "] " JLONG_FORMAT " bytes", p2i(p), p2i(end), ((jlong)(end - p))); 687 688 // Print constant table. 689 if (nm->consts_size() > 0) { 690 nm->print_nmethod_labels(env.output(), nm->consts_begin()); 691 int offset = 0; 692 for (address p = nm->consts_begin(); p < nm->consts_end(); p += 4, offset += 4) { 693 if ((offset % 8) == 0) { 694 env.output()->print_cr(" " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT " " PTR64_FORMAT, p2i(p), offset, *((int32_t*) p), *((int64_t*) p)); 695 } else { 696 env.output()->print_cr(" " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT, p2i(p), offset, *((int32_t*) p)); 697 } 698 } 699 } 700 701 env.decode_instructions(p, end); 702 } 703 704 // To prevent excessive code expansion in the interpreter generator, we 705 // do not inline this function into Disassembler::hook(). 706 void Disassembler::_hook(const char* file, int line, MacroAssembler* masm) { 707 decode_env::hook(file, line, masm->code_section()->end()); 708 }