jdk8-mips64-public/hotspot: src/share/vm/compiler/disassembler.cpp@710a3c8b516e

     1 /*

     2  * Copyright (c) 2008, 2014, 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  */

    25 /*

    26  * This file has been modified by Loongson Technology in 2015. These

    27  * modifications are Copyright (c) 2015 Loongson Technology, and are made

    28  * available on the same license terms set forth above.

    29  */

    31 #include "precompiled.hpp"

    32 #include "classfile/javaClasses.hpp"

    33 #include "code/codeCache.hpp"

    34 #include "compiler/disassembler.hpp"

    35 #include "gc_interface/collectedHeap.hpp"

    36 #include "memory/cardTableModRefBS.hpp"

    37 #include "runtime/fprofiler.hpp"

    38 #include "runtime/handles.inline.hpp"

    39 #include "runtime/stubCodeGenerator.hpp"

    40 #include "runtime/stubRoutines.hpp"

    41 #ifdef TARGET_ARCH_x86

    42 # include "depChecker_x86.hpp"

    43 #endif

    44 #ifdef TARGET_ARCH_sparc

    45 # include "depChecker_sparc.hpp"

    46 #endif

    47 #ifdef TARGET_ARCH_zero

    48 # include "depChecker_zero.hpp"

    49 #endif

    50 #ifdef TARGET_ARCH_arm

    51 # include "depChecker_arm.hpp"

    52 #endif

    53 #ifdef TARGET_ARCH_ppc

    54 # include "depChecker_ppc.hpp"

    55 #endif

    56 #ifdef TARGET_ARCH_mips

    57 # include "depChecker_mips.hpp"

    58 #endif

    59 #ifdef SHARK

    60 #include "shark/sharkEntry.hpp"

    61 #endif

    63 #ifdef MIPS64

    64 // do nothing.

    65 #else

    66 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC

    68 void*       Disassembler::_library               = NULL;

    69 bool        Disassembler::_tried_to_load_library = false;

    71 // This routine is in the shared library:

    72 Disassembler::decode_func_virtual Disassembler::_decode_instructions_virtual = NULL;

    73 Disassembler::decode_func Disassembler::_decode_instructions = NULL;

    75 static const char hsdis_library_name[] = "hsdis-"HOTSPOT_LIB_ARCH;

    76 static const char decode_instructions_virtual_name[] = "decode_instructions_virtual";

    77 static const char decode_instructions_name[] = "decode_instructions";

    78 static bool use_new_version = true;

    79 #define COMMENT_COLUMN  40 LP64_ONLY(+8) /*could be an option*/

    80 #define BYTES_COMMENT   ";..."  /* funky byte display comment */

    82 bool Disassembler::load_library() {

    83   if (_decode_instructions_virtual != NULL || _decode_instructions != NULL) {

    84     // Already succeeded.

    85     return true;

    86   }

    87   if (_tried_to_load_library) {

    88     // Do not try twice.

    89     // To force retry in debugger: assign _tried_to_load_library=0

    90     return false;

    91   }

    92   // Try to load it.

    93   char ebuf[1024];

    94   char buf[JVM_MAXPATHLEN];

    95   os::jvm_path(buf, sizeof(buf));

    96   int jvm_offset = -1;

    97   int lib_offset = -1;

    98   {

    99     // Match "jvm[^/]*" in jvm_path.

   100     const char* base = buf;

   101     const char* p = strrchr(buf, '/');

   102     if (p != NULL) lib_offset = p - base + 1;

   103     p = strstr(p ? p : base, "jvm");

   104     if (p != NULL)  jvm_offset = p - base;

   105   }

   106   // Find the disassembler shared library.

   107   // Search for several paths derived from libjvm, in this order:

   108   // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so  (for compatibility)

   109   // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so

   110   // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so

   111   // 4. hsdis-<arch>.so  (using LD_LIBRARY_PATH)

   112   if (jvm_offset >= 0) {

   113     // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so

   114     strcpy(&buf[jvm_offset], hsdis_library_name);

   115     strcat(&buf[jvm_offset], os::dll_file_extension());

   116     _library = os::dll_load(buf, ebuf, sizeof ebuf);

   117     if (_library == NULL) {

   118       // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so

   119       strcpy(&buf[lib_offset], hsdis_library_name);

   120       strcat(&buf[lib_offset], os::dll_file_extension());

   121       _library = os::dll_load(buf, ebuf, sizeof ebuf);

   122     }

   123     if (_library == NULL) {

   124       // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so

   125       buf[lib_offset - 1] = '\0';

   126       const char* p = strrchr(buf, '/');

   127       if (p != NULL) {

   128         lib_offset = p - buf + 1;

   129         strcpy(&buf[lib_offset], hsdis_library_name);

   130         strcat(&buf[lib_offset], os::dll_file_extension());

   131         _library = os::dll_load(buf, ebuf, sizeof ebuf);

   132       }

   133     }

   134   }

   135   if (_library == NULL) {

   136     // 4. hsdis-<arch>.so  (using LD_LIBRARY_PATH)

   137     strcpy(&buf[0], hsdis_library_name);

   138     strcat(&buf[0], os::dll_file_extension());

   139     _library = os::dll_load(buf, ebuf, sizeof ebuf);

   140   }

   141   if (_library != NULL) {

   142     _decode_instructions_virtual = CAST_TO_FN_PTR(Disassembler::decode_func_virtual,

   143                                           os::dll_lookup(_library, decode_instructions_virtual_name));

   144   }

   145   if (_decode_instructions_virtual == NULL) {

   146     // could not spot in new version, try old version

   147     _decode_instructions = CAST_TO_FN_PTR(Disassembler::decode_func,

   148                                           os::dll_lookup(_library, decode_instructions_name));

   149     use_new_version = false;

   150   } else {

   151     use_new_version = true;

   152   }

   153   _tried_to_load_library = true;

   154   if (_decode_instructions_virtual == NULL && _decode_instructions == NULL) {

   155     tty->print_cr("Could not load %s; %s; %s", buf,

   156                   ((_library != NULL)

   157                    ? "entry point is missing"

   158                    : (WizardMode || PrintMiscellaneous)

   159                    ? (const char*)ebuf

   160                    : "library not loadable"),

   161                   "PrintAssembly is disabled");

   162     return false;

   163   }

   165   // Success.

   166   tty->print_cr("Loaded disassembler from %s", buf);

   167   return true;

   168 }

   171 class decode_env {

   172  private:

   173   nmethod*      _nm;

   174   CodeBlob*     _code;

   175   CodeStrings   _strings;

   176   outputStream* _output;

   177   address       _start, _end;

   179   char          _option_buf[512];

   180   char          _print_raw;

   181   bool          _print_pc;

   182   bool          _print_bytes;

   183   address       _cur_insn;

   184   int           _total_ticks;

   185   int           _bytes_per_line; // arch-specific formatting option

   187   static bool match(const char* event, const char* tag) {

   188     size_t taglen = strlen(tag);

   189     if (strncmp(event, tag, taglen) != 0)

   190       return false;

   191     char delim = event[taglen];

   192     return delim == '\0' || delim == ' ' || delim == '/' || delim == '=';

   193   }

   195   void collect_options(const char* p) {

   196     if (p == NULL || p[0] == '\0')  return;

   197     size_t opt_so_far = strlen(_option_buf);

   198     if (opt_so_far + 1 + strlen(p) + 1 > sizeof(_option_buf))  return;

   199     char* fillp = &_option_buf[opt_so_far];

   200     if (opt_so_far > 0) *fillp++ = ',';

   201     strcat(fillp, p);

   202     // replace white space by commas:

   203     char* q = fillp;

   204     while ((q = strpbrk(q, " \t\n")) != NULL)

   205       *q++ = ',';

   206     // Note that multiple PrintAssemblyOptions flags accumulate with \n,

   207     // which we want to be changed to a comma...

   208   }

   210   void print_insn_labels();

   211   void print_insn_bytes(address pc0, address pc);

   212   void print_address(address value);

   214  public:

   215   decode_env(CodeBlob* code, outputStream* output, CodeStrings c = CodeStrings());

   217   address decode_instructions(address start, address end);

   219   void start_insn(address pc) {

   220     _cur_insn = pc;

   221     output()->bol();

   222     print_insn_labels();

   223   }

   225   void end_insn(address pc) {

   226     address pc0 = cur_insn();

   227     outputStream* st = output();

   228     if (_print_bytes && pc > pc0)

   229       print_insn_bytes(pc0, pc);

   230     if (_nm != NULL) {

   231       _nm->print_code_comment_on(st, COMMENT_COLUMN, pc0, pc);

   232       // this calls reloc_string_for which calls oop::print_value_on

   233     }

   235     // Output pc bucket ticks if we have any

   236     if (total_ticks() != 0) {

   237       address bucket_pc = FlatProfiler::bucket_start_for(pc);

   238       if (bucket_pc != NULL && bucket_pc > pc0 && bucket_pc <= pc) {

   239         int bucket_count = FlatProfiler::bucket_count_for(pc0);

   240         if (bucket_count != 0) {

   241           st->bol();

   242           st->print_cr("%3.1f%% [%d]", bucket_count*100.0/total_ticks(), bucket_count);

   243         }

   244       }

   245     }

   246     // follow each complete insn by a nice newline

   247     st->cr();

   248   }

   250   address handle_event(const char* event, address arg);

   252   outputStream* output() { return _output; }

   253   address cur_insn() { return _cur_insn; }

   254   int total_ticks() { return _total_ticks; }

   255   void set_total_ticks(int n) { _total_ticks = n; }

   256   const char* options() { return _option_buf; }

   257 };

   259 decode_env::decode_env(CodeBlob* code, outputStream* output, CodeStrings c) {

   260   memset(this, 0, sizeof(*this));

   261   _output = output ? output : tty;

   262   _code = code;

   263   if (code != NULL && code->is_nmethod())

   264     _nm = (nmethod*) code;

   265   _strings.assign(c);

   267   // by default, output pc but not bytes:

   268   _print_pc       = true;

   269   _print_bytes    = false;

   270   _bytes_per_line = Disassembler::pd_instruction_alignment();

   272   // parse the global option string:

   273   collect_options(Disassembler::pd_cpu_opts());

   274   collect_options(PrintAssemblyOptions);

   276   if (strstr(options(), "hsdis-")) {

   277     if (strstr(options(), "hsdis-print-raw"))

   278       _print_raw = (strstr(options(), "xml") ? 2 : 1);

   279     if (strstr(options(), "hsdis-print-pc"))

   280       _print_pc = !_print_pc;

   281     if (strstr(options(), "hsdis-print-bytes"))

   282       _print_bytes = !_print_bytes;

   283   }

   284   if (strstr(options(), "help")) {

   285     tty->print_cr("PrintAssemblyOptions help:");

   286     tty->print_cr("  hsdis-print-raw       test plugin by requesting raw output");

   287     tty->print_cr("  hsdis-print-raw-xml   test plugin by requesting raw xml");

   288     tty->print_cr("  hsdis-print-pc        turn off PC printing (on by default)");

   289     tty->print_cr("  hsdis-print-bytes     turn on instruction byte output");

   290     tty->print_cr("combined options: %s", options());

   291   }

   292 }

   294 address decode_env::handle_event(const char* event, address arg) {

   295   if (match(event, "insn")) {

   296     start_insn(arg);

   297   } else if (match(event, "/insn")) {

   298     end_insn(arg);

   299   } else if (match(event, "addr")) {

   300     if (arg != NULL) {

   301       print_address(arg);

   302       return arg;

   303     }

   304   } else if (match(event, "mach")) {

   305     static char buffer[32] = { 0, };

   306     if (strcmp(buffer, (const char*)arg) != 0 ||

   307         strlen((const char*)arg) > sizeof(buffer) - 1) {

   308       // Only print this when the mach changes

   309       strncpy(buffer, (const char*)arg, sizeof(buffer) - 1);

   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 }

   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;

   324   if (adr == NULL) {

   325     st->print("NULL");

   326     return;

   327   }

   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   }

   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       if (desc != NULL) {

   342         st->print("Stub::%s", desc->name());

   343         if (desc->begin() != adr)

   344           st->print("%+d 0x%p",adr - desc->begin(), adr);

   345         else if (WizardMode) st->print(" " PTR_FORMAT, adr);

   346         return;

   347       }

   348       st->print("Stub::<unknown> " PTR_FORMAT, adr);

   349       return;

   350     }

   352     BarrierSet* bs = Universe::heap()->barrier_set();

   353     if (bs->kind() == BarrierSet::CardTableModRef &&

   354         adr == (address)((CardTableModRefBS*)(bs))->byte_map_base) {

   355       st->print("word_map_base");

   356       if (WizardMode) st->print(" " INTPTR_FORMAT, (intptr_t)adr);

   357       return;

   358     }

   360     oop obj;

   361     if (_nm != NULL

   362         && (obj = _nm->embeddedOop_at(cur_insn())) != NULL

   363         && (address) obj == adr

   364         && Universe::heap()->is_in(obj)

   365         && Universe::heap()->is_in(obj->klass())) {

   366       julong c = st->count();

   367       obj->print_value_on(st);

   368       if (st->count() == c) {

   369         // No output.  (Can happen in product builds.)

   370         st->print("(a %s)", obj->klass()->external_name());

   371       }

   372       return;

   373     }

   374   }

   376   // Fall through to a simple (hexadecimal) numeral.

   377   st->print(PTR_FORMAT, adr);

   378 }

   380 void decode_env::print_insn_labels() {

   381   address p = cur_insn();

   382   outputStream* st = output();

   383   CodeBlob* cb = _code;

   384   if (cb != NULL) {

   385     cb->print_block_comment(st, p);

   386   }

   387   _strings.print_block_comment(st, (intptr_t)(p - _start));

   388   if (_print_pc) {

   389     st->print("  " PTR_FORMAT ": ", p);

   390   }

   391 }

   393 void decode_env::print_insn_bytes(address pc, address pc_limit) {

   394   outputStream* st = output();

   395   size_t incr = 1;

   396   size_t perline = _bytes_per_line;

   397   if ((size_t) Disassembler::pd_instruction_alignment() >= sizeof(int)

   398       && !((uintptr_t)pc % sizeof(int))

   399       && !((uintptr_t)pc_limit % sizeof(int))) {

   400     incr = sizeof(int);

   401     if (perline % incr)  perline += incr - (perline % incr);

   402   }

   403   while (pc < pc_limit) {

   404     // tab to the desired column:

   405     st->move_to(COMMENT_COLUMN);

   406     address pc0 = pc;

   407     address pc1 = pc + perline;

   408     if (pc1 > pc_limit)  pc1 = pc_limit;

   409     for (; pc < pc1; pc += incr) {

   410       if (pc == pc0)

   411         st->print(BYTES_COMMENT);

   412       else if ((uint)(pc - pc0) % sizeof(int) == 0)

   413         st->print(" ");         // put out a space on word boundaries

   414       if (incr == sizeof(int))

   415             st->print("%08lx", *(int*)pc);

   416       else  st->print("%02x",   (*pc)&0xFF);

   417     }

   418     st->cr();

   419   }

   420 }

   423 static void* event_to_env(void* env_pv, const char* event, void* arg) {

   424   decode_env* env = (decode_env*) env_pv;

   425   return env->handle_event(event, (address) arg);

   426 }

   428 ATTRIBUTE_PRINTF(2, 3)

   429 static int printf_to_env(void* env_pv, const char* format, ...) {

   430   decode_env* env = (decode_env*) env_pv;

   431   outputStream* st = env->output();

   432   size_t flen = strlen(format);

   433   const char* raw = NULL;

   434   if (flen == 0)  return 0;

   435   if (flen == 1 && format[0] == '\n') { st->bol(); return 1; }

   436   if (flen < 2 ||

   437       strchr(format, '%') == NULL) {

   438     raw = format;

   439   } else if (format[0] == '%' && format[1] == '%' &&

   440              strchr(format+2, '%') == NULL) {

   441     // happens a lot on machines with names like %foo

   442     flen--;

   443     raw = format+1;

   444   }

   445   if (raw != NULL) {

   446     st->print_raw(raw, (int) flen);

   447     return (int) flen;

   448   }

   449   va_list ap;

   450   va_start(ap, format);

   451   julong cnt0 = st->count();

   452   st->vprint(format, ap);

   453   julong cnt1 = st->count();

   454   va_end(ap);

   455   return (int)(cnt1 - cnt0);

   456 }

   458 address decode_env::decode_instructions(address start, address end) {

   459   _start = start; _end = end;

   461   assert(((((intptr_t)start | (intptr_t)end) % Disassembler::pd_instruction_alignment()) == 0), "misaligned insn addr");

   463   const int show_bytes = false; // for disassembler debugging

   465   //_version = Disassembler::pd_cpu_version();

   467   if (!Disassembler::can_decode()) {

   468     return NULL;

   469   }

   471   // decode a series of instructions and return the end of the last instruction

   473   if (_print_raw) {

   474     // Print whatever the library wants to print, w/o fancy callbacks.

   475     // This is mainly for debugging the library itself.

   476     FILE* out = stdout;

   477     FILE* xmlout = (_print_raw > 1 ? out : NULL);

   478     return use_new_version ?

   479       (address)

   480       (*Disassembler::_decode_instructions_virtual)((uintptr_t)start, (uintptr_t)end,

   481                                                     start, end - start,

   482                                                     NULL, (void*) xmlout,

   483                                                     NULL, (void*) out,

   484                                                     options(), 0/*nice new line*/)

   485       :

   486       (address)

   487       (*Disassembler::_decode_instructions)(start, end,

   488                                             NULL, (void*) xmlout,

   489                                             NULL, (void*) out,

   490                                             options());

   491   }

   493   return use_new_version ?

   494     (address)

   495     (*Disassembler::_decode_instructions_virtual)((uintptr_t)start, (uintptr_t)end,

   496                                                   start, end - start,

   497                                                   &event_to_env,  (void*) this,

   498                                                   &printf_to_env, (void*) this,

   499                                                   options(), 0/*nice new line*/)

   500     :

   501     (address)

   502     (*Disassembler::_decode_instructions)(start, end,

   503                                           &event_to_env,  (void*) this,

   504                                           &printf_to_env, (void*) this,

   505                                           options());

   506 }

   509 void Disassembler::decode(CodeBlob* cb, outputStream* st) {

   510   if (!load_library())  return;

   511   decode_env env(cb, st);

   512   env.output()->print_cr("Decoding CodeBlob " PTR_FORMAT, cb);

   513   env.decode_instructions(cb->code_begin(), cb->code_end());

   514 }

   516 void Disassembler::decode(address start, address end, outputStream* st, CodeStrings c) {

   517   if (!load_library())  return;

   518   decode_env env(CodeCache::find_blob_unsafe(start), st, c);

   519   env.decode_instructions(start, end);

   520 }

   522 void Disassembler::decode(nmethod* nm, outputStream* st) {

   523   if (!load_library())  return;

   524   decode_env env(nm, st);

   525   env.output()->print_cr("Decoding compiled method " PTR_FORMAT ":", nm);

   526   env.output()->print_cr("Code:");

   528 #ifdef SHARK

   529   SharkEntry* entry = (SharkEntry *) nm->code_begin();

   530   unsigned char* p   = entry->code_start();

   531   unsigned char* end = entry->code_limit();

   532 #else

   533   unsigned char* p   = nm->code_begin();

   534   unsigned char* end = nm->code_end();

   535 #endif // SHARK

   537   // If there has been profiling, print the buckets.

   538   if (FlatProfiler::bucket_start_for(p) != NULL) {

   539     unsigned char* p1 = p;

   540     int total_bucket_count = 0;

   541     while (p1 < end) {

   542       unsigned char* p0 = p1;

   543       p1 += pd_instruction_alignment();

   544       address bucket_pc = FlatProfiler::bucket_start_for(p1);

   545       if (bucket_pc != NULL && bucket_pc > p0 && bucket_pc <= p1)

   546         total_bucket_count += FlatProfiler::bucket_count_for(p0);

   547     }

   548     env.set_total_ticks(total_bucket_count);

   549   }

   551   // Print constant table.

   552   if (nm->consts_size() > 0) {

   553     nm->print_nmethod_labels(env.output(), nm->consts_begin());

   554     int offset = 0;

   555     for (address p = nm->consts_begin(); p < nm->consts_end(); p += 4, offset += 4) {

   556       if ((offset % 8) == 0) {

   557         env.output()->print_cr("  " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT "   " PTR64_FORMAT, p, offset, *((int32_t*) p), *((int64_t*) p));

   558       } else {

   559         env.output()->print_cr("  " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT,                    p, offset, *((int32_t*) p));

   560       }

   561     }

   562   }

   564   env.decode_instructions(p, end);

   565 }

   567 #endif //MIPS64 disassembler_mips.cpp implements. 2013/02/25

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/compiler/disassembler.cpp@710a3c8b516e

src/share/vm/compiler/disassembler.cpp