jdk8-mips64-public/hotspot: src/share/vm/compiler/disassembler.cpp@eb7ce841ccec

     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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC

    65 void*       Disassembler::_library               = NULL;

    66 bool        Disassembler::_tried_to_load_library = false;

    68 // This routine is in the shared library:

    69 Disassembler::decode_func_virtual Disassembler::_decode_instructions_virtual = NULL;

    70 Disassembler::decode_func Disassembler::_decode_instructions = NULL;

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

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

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

    75 static bool use_new_version = true;

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

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

    79 bool Disassembler::load_library() {

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

    81     // Already succeeded.

    82     return true;

    83   }

    84   if (_tried_to_load_library) {

    85     // Do not try twice.

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

    87     return false;

    88   }

    89   // Try to load it.

    90   char ebuf[1024];

    91   char buf[JVM_MAXPATHLEN];

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

    93   int jvm_offset = -1;

    94   int lib_offset = -1;

    95   {

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

    97     const char* base = buf;

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

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

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

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

   102   }

   103   // Find the disassembler shared library.

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

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

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

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

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

   109   if (jvm_offset >= 0) {

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

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

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

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

   114     if (_library == NULL) {

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

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

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

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

   119     }

   120     if (_library == NULL) {

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

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

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

   124       if (p != NULL) {

   125         lib_offset = p - buf + 1;

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

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

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

   129       }

   130     }

   131   }

   132   if (_library == NULL) {

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

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

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

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

   137   }

   138   if (_library != NULL) {

   139     _decode_instructions_virtual = CAST_TO_FN_PTR(Disassembler::decode_func_virtual,

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

   141   }

   142   if (_decode_instructions_virtual == NULL) {

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

   144     _decode_instructions = CAST_TO_FN_PTR(Disassembler::decode_func,

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

   146     use_new_version = false;

   147   } else {

   148     use_new_version = true;

   149   }

   150   _tried_to_load_library = true;

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

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

   153                   ((_library != NULL)

   154                    ? "entry point is missing"

   155                    : (WizardMode || PrintMiscellaneous)

   156                    ? (const char*)ebuf

   157                    : "library not loadable"),

   158                   "PrintAssembly is disabled");

   159     return false;

   160   }

   162   // Success.

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

   164   return true;

   165 }

   168 class decode_env {

   169  private:

   170   nmethod*      _nm;

   171   CodeBlob*     _code;

   172   CodeStrings   _strings;

   173   outputStream* _output;

   174   address       _start, _end;

   176   char          _option_buf[512];

   177   char          _print_raw;

   178   bool          _print_pc;

   179   bool          _print_bytes;

   180   address       _cur_insn;

   181   int           _total_ticks;

   182   int           _bytes_per_line; // arch-specific formatting option

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

   185     size_t taglen = strlen(tag);

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

   187       return false;

   188     char delim = event[taglen];

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

   190   }

   192   void collect_options(const char* p) {

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

   194     size_t opt_so_far = strlen(_option_buf);

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

   196     char* fillp = &_option_buf[opt_so_far];

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

   198     strcat(fillp, p);

   199     // replace white space by commas:

   200     char* q = fillp;

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

   202       *q++ = ',';

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

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

   205   }

   207   void print_insn_labels();

   208   void print_insn_bytes(address pc0, address pc);

   209   void print_address(address value);

   211  public:

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

   214   address decode_instructions(address start, address end);

   216   void start_insn(address pc) {

   217     _cur_insn = pc;

   218     output()->bol();

   219     print_insn_labels();

   220   }

   222   void end_insn(address pc) {

   223     address pc0 = cur_insn();

   224     outputStream* st = output();

   225     if (_print_bytes && pc > pc0)

   226       print_insn_bytes(pc0, pc);

   227     if (_nm != NULL) {

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

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

   230     }

   232     // Output pc bucket ticks if we have any

   233     if (total_ticks() != 0) {

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

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

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

   237         if (bucket_count != 0) {

   238           st->bol();

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

   240         }

   241       }

   242     }

   243     // follow each complete insn by a nice newline

   244     st->cr();

   245   }

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

   249   outputStream* output() { return _output; }

   250   address cur_insn() { return _cur_insn; }

   251   int total_ticks() { return _total_ticks; }

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

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

   254 };

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

   257   _nm((code != NULL && code->is_nmethod()) ? (nmethod*)code : NULL),

   258   _code(code),

   259   _strings(),

   260   _output(output ? output : tty),

   261   _start(NULL),

   262   _end(NULL),

   263   _print_raw(0),

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

   265   _print_pc(true),

   266   _print_bytes(false),

   267   _cur_insn(NULL),

   268   _total_ticks(0),

   269   _bytes_per_line(Disassembler::pd_instruction_alignment())

   270 {

   271   memset(_option_buf, 0, sizeof(_option_buf));

   272   _strings.copy(c);

   274   // parse the global option string:

   275   collect_options(Disassembler::pd_cpu_opts());

   276   collect_options(PrintAssemblyOptions);

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

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

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

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

   282       _print_pc = !_print_pc;

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

   284       _print_bytes = !_print_bytes;

   285   }

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

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

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

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

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

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

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

   293   }

   294 }

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

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

   298     start_insn(arg);

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

   300     end_insn(arg);

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

   302     if (arg != NULL) {

   303       print_address(arg);

   304       return arg;

   305     }

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

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

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

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

   310       // Only print this when the mach changes

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

   312       buffer[sizeof(buffer) - 1] = '\0';

   313       output()->print_cr("[Disassembling for mach='%s']", arg);

   314     }

   315   } else if (match(event, "format bytes-per-line")) {

   316     _bytes_per_line = (int) (intptr_t) arg;

   317   } else {

   318     // ignore unrecognized markup

   319   }

   320   return NULL;

   321 }

   323 // called by the disassembler to print out jump targets and data addresses

   324 void decode_env::print_address(address adr) {

   325   outputStream* st = _output;

   327   if (adr == NULL) {

   328     st->print("NULL");

   329     return;

   330   }

   332   int small_num = (int)(intptr_t)adr;

   333   if ((intptr_t)adr == (intptr_t)small_num

   334       && -1 <= small_num && small_num <= 9) {

   335     st->print("%d", small_num);

   336     return;

   337   }

   339   if (Universe::is_fully_initialized()) {

   340     if (StubRoutines::contains(adr)) {

   341       StubCodeDesc* desc = StubCodeDesc::desc_for(adr);

   342       if (desc == NULL)

   343         desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset);

   344       if (desc != NULL) {

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

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

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

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

   349         return;

   350       }

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

   352       return;

   353     }

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

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

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

   358       st->print("word_map_base");

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

   360       return;

   361     }

   363     oop obj;

   364     if (_nm != NULL

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

   366         && (address) obj == adr

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

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

   369       julong c = st->count();

   370       obj->print_value_on(st);

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

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

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

   374       }

   375       return;

   376     }

   377   }

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

   380   st->print(PTR_FORMAT, adr);

   381 }

   383 void decode_env::print_insn_labels() {

   384   address p = cur_insn();

   385   outputStream* st = output();

   386   CodeBlob* cb = _code;

   387   if (cb != NULL) {

   388     cb->print_block_comment(st, p);

   389   }

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

   391   if (_print_pc) {

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

   393   }

   394 }

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

   397   outputStream* st = output();

   398   size_t incr = 1;

   399   size_t perline = _bytes_per_line;

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

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

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

   403     incr = sizeof(int);

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

   405   }

   406   while (pc < pc_limit) {

   407     // tab to the desired column:

   408     st->move_to(COMMENT_COLUMN);

   409     address pc0 = pc;

   410     address pc1 = pc + perline;

   411     if (pc1 > pc_limit)  pc1 = pc_limit;

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

   413       if (pc == pc0)

   414         st->print(BYTES_COMMENT);

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

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

   417       if (incr == sizeof(int))

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

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

   420     }

   421     st->cr();

   422   }

   423 }

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

   427   decode_env* env = (decode_env*) env_pv;

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

   429 }

   431 ATTRIBUTE_PRINTF(2, 3)

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

   433   decode_env* env = (decode_env*) env_pv;

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

   435   size_t flen = strlen(format);

   436   const char* raw = NULL;

   437   if (flen == 0)  return 0;

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

   439   if (flen < 2 ||

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

   441     raw = format;

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

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

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

   445     flen--;

   446     raw = format+1;

   447   }

   448   if (raw != NULL) {

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

   450     return (int) flen;

   451   }

   452   va_list ap;

   453   va_start(ap, format);

   454   julong cnt0 = st->count();

   455   st->vprint(format, ap);

   456   julong cnt1 = st->count();

   457   va_end(ap);

   458   return (int)(cnt1 - cnt0);

   459 }

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

   462   _start = start; _end = end;

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

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

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

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

   471     return NULL;

   472   }

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

   476   if (_print_raw) {

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

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

   479     FILE* out = stdout;

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

   481     return use_new_version ?

   482       (address)

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

   484                                                     start, end - start,

   485                                                     NULL, (void*) xmlout,

   486                                                     NULL, (void*) out,

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

   488       :

   489       (address)

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

   491                                             NULL, (void*) xmlout,

   492                                             NULL, (void*) out,

   493                                             options());

   494   }

   496   return use_new_version ?

   497     (address)

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

   499                                                   start, end - start,

   500                                                   &event_to_env,  (void*) this,

   501                                                   &printf_to_env, (void*) this,

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

   503     :

   504     (address)

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

   506                                           &event_to_env,  (void*) this,

   507                                           &printf_to_env, (void*) this,

   508                                           options());

   509 }

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

   513   if (!load_library())  return;

   514   decode_env env(cb, st);

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

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

   517 }

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

   520   if (!load_library())  return;

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

   522   env.decode_instructions(start, end);

   523 }

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

   526   if (!load_library())  return;

   527   decode_env env(nm, st);

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

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

   531 #ifdef SHARK

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

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

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

   535 #else

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

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

   538 #endif // SHARK

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

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

   542     unsigned char* p1 = p;

   543     int total_bucket_count = 0;

   544     while (p1 < end) {

   545       unsigned char* p0 = p1;

   546       p1 += pd_instruction_alignment();

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

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

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

   550     }

   551     env.set_total_ticks(total_bucket_count);

   552   }

   554   // Print constant table.

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

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

   557     int offset = 0;

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

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

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

   561       } else {

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

   563       }

   564     }

   565   }

   567   env.decode_instructions(p, end);

   568 }

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

src/share/vm/compiler/disassembler.cpp@eb7ce841ccec

src/share/vm/compiler/disassembler.cpp