src/share/vm/classfile/vmSymbols.cpp

Tue, 21 Dec 2010 04:37:30 -0800

author
twisti
date
Tue, 21 Dec 2010 04:37:30 -0800
changeset 2408
ef3c5db0b3ae
parent 2314
f95d63e2154a
child 2497
3582bf76420e
permissions
-rw-r--r--

7008165: Garbage in ClassFormatError message
Summary: When bootstrap_method_ref in BootstrapMethods attribute points to a wrong CP entry (non-MethodHandle), JVM throws ClassFormatError with a message, where method index and class file name is garbage.
Reviewed-by: iveresov

     1 /*
     2  * Copyright (c) 1997, 2010, 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 #include "precompiled.hpp"
    26 #include "classfile/vmSymbols.hpp"
    27 #include "memory/oopFactory.hpp"
    28 #include "oops/oop.inline.hpp"
    29 #include "runtime/handles.inline.hpp"
    30 #include "utilities/xmlstream.hpp"
    33 symbolOop vmSymbols::_symbols[vmSymbols::SID_LIMIT];
    35 symbolOop vmSymbols::_type_signatures[T_VOID+1] = { NULL /*, NULL...*/ };
    37 inline int compare_symbol(symbolOop a, symbolOop b) {
    38   if (a == b)  return 0;
    39   // follow the natural address order:
    40   return (address)a > (address)b ? +1 : -1;
    41 }
    43 static vmSymbols::SID vm_symbol_index[vmSymbols::SID_LIMIT];
    44 extern "C" {
    45   static int compare_vmsymbol_sid(const void* void_a, const void* void_b) {
    46     symbolOop a = vmSymbols::symbol_at(*((vmSymbols::SID*) void_a));
    47     symbolOop b = vmSymbols::symbol_at(*((vmSymbols::SID*) void_b));
    48     return compare_symbol(a, b);
    49   }
    50 }
    52 #ifndef PRODUCT
    53 #define VM_SYMBOL_ENUM_NAME_BODY(name, string) #name "\0"
    54 static const char* vm_symbol_enum_names =
    55   VM_SYMBOLS_DO(VM_SYMBOL_ENUM_NAME_BODY, VM_ALIAS_IGNORE)
    56   "\0";
    57 static const char* vm_symbol_enum_name(vmSymbols::SID sid) {
    58   const char* string = &vm_symbol_enum_names[0];
    59   int skip = (int)sid - (int)vmSymbols::FIRST_SID;
    60   for (; skip != 0; skip--) {
    61     size_t skiplen = strlen(string);
    62     if (skiplen == 0)  return "<unknown>";  // overflow
    63     string += skiplen+1;
    64   }
    65   return string;
    66 }
    67 #endif //PRODUCT
    69 // Put all the VM symbol strings in one place.
    70 // Makes for a more compact libjvm.
    71 #define VM_SYMBOL_BODY(name, string) string "\0"
    72 static const char* vm_symbol_bodies = VM_SYMBOLS_DO(VM_SYMBOL_BODY, VM_ALIAS_IGNORE);
    74 void vmSymbols::initialize(TRAPS) {
    75   assert((int)SID_LIMIT <= (1<<log2_SID_LIMIT), "must fit in this bitfield");
    76   assert((int)SID_LIMIT*5 > (1<<log2_SID_LIMIT), "make the bitfield smaller, please");
    77   assert(vmIntrinsics::FLAG_LIMIT <= (1 << vmIntrinsics::log2_FLAG_LIMIT), "must fit in this bitfield");
    79   if (!UseSharedSpaces) {
    80     const char* string = &vm_symbol_bodies[0];
    81     for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
    82       symbolOop sym = oopFactory::new_symbol(string, CHECK);
    83       _symbols[index] = sym;
    84       string += strlen(string); // skip string body
    85       string += 1;              // skip trailing null
    86     }
    88     _type_signatures[T_BYTE]    = byte_signature();
    89     _type_signatures[T_CHAR]    = char_signature();
    90     _type_signatures[T_DOUBLE]  = double_signature();
    91     _type_signatures[T_FLOAT]   = float_signature();
    92     _type_signatures[T_INT]     = int_signature();
    93     _type_signatures[T_LONG]    = long_signature();
    94     _type_signatures[T_SHORT]   = short_signature();
    95     _type_signatures[T_BOOLEAN] = bool_signature();
    96     _type_signatures[T_VOID]    = void_signature();
    97     // no single signatures for T_OBJECT or T_ARRAY
    98   }
   100 #ifdef ASSERT
   101   // Check for duplicates:
   102   for (int i1 = (int)FIRST_SID; i1 < (int)SID_LIMIT; i1++) {
   103     symbolOop sym = symbol_at((SID)i1);
   104     for (int i2 = (int)FIRST_SID; i2 < i1; i2++) {
   105       if (symbol_at((SID)i2) == sym) {
   106         tty->print("*** Duplicate VM symbol SIDs %s(%d) and %s(%d): \"",
   107                    vm_symbol_enum_name((SID)i2), i2,
   108                    vm_symbol_enum_name((SID)i1), i1);
   109         sym->print_symbol_on(tty);
   110         tty->print_cr("\"");
   111       }
   112     }
   113   }
   114 #endif //ASSERT
   116   // Create an index for find_id:
   117   {
   118     for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   119       vm_symbol_index[index] = (SID)index;
   120     }
   121     int num_sids = SID_LIMIT-FIRST_SID;
   122     qsort(&vm_symbol_index[FIRST_SID], num_sids, sizeof(vm_symbol_index[0]),
   123           compare_vmsymbol_sid);
   124   }
   126 #ifdef ASSERT
   127   {
   128     // Spot-check correspondence between strings, symbols, and enums:
   129     assert(_symbols[NO_SID] == NULL, "must be");
   130     const char* str = "java/lang/Object";
   131     symbolOop sym = oopFactory::new_symbol(str, CHECK);
   132     assert(strcmp(str, (char*)sym->base()) == 0, "");
   133     assert(sym == java_lang_Object(), "");
   134     SID sid = VM_SYMBOL_ENUM_NAME(java_lang_Object);
   135     assert(find_sid(sym) == sid, "");
   136     assert(symbol_at(sid) == sym, "");
   138     // Make sure find_sid produces the right answer in each case.
   139     for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   140       sym = symbol_at((SID)index);
   141       sid = find_sid(sym);
   142       assert(sid == (SID)index, "symbol index works");
   143       // Note:  If there are duplicates, this assert will fail.
   144       // A "Duplicate VM symbol" message will have already been printed.
   145     }
   147     // The string "format" happens (at the moment) not to be a vmSymbol,
   148     // though it is a method name in java.lang.String.
   149     str = "format";
   150     sym = oopFactory::new_symbol(str, CHECK);
   151     sid = find_sid(sym);
   152     assert(sid == NO_SID, "symbol index works (negative test)");
   153   }
   154 #endif
   155 }
   158 #ifndef PRODUCT
   159 const char* vmSymbols::name_for(vmSymbols::SID sid) {
   160   if (sid == NO_SID)
   161     return "NO_SID";
   162   const char* string = &vm_symbol_bodies[0];
   163   for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   164     if (index == (int)sid)
   165       return string;
   166     string += strlen(string); // skip string body
   167     string += 1;              // skip trailing null
   168   }
   169   return "BAD_SID";
   170 }
   171 #endif
   175 void vmSymbols::oops_do(OopClosure* f, bool do_all) {
   176   for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   177     f->do_oop((oop*) &_symbols[index]);
   178   }
   179   for (int i = 0; i < T_VOID+1; i++) {
   180     if (_type_signatures[i] != NULL) {
   181       assert(i >= T_BOOLEAN, "checking");
   182       f->do_oop((oop*)&_type_signatures[i]);
   183     } else if (do_all) {
   184       f->do_oop((oop*)&_type_signatures[i]);
   185     }
   186   }
   187 }
   190 BasicType vmSymbols::signature_type(symbolOop s) {
   191   assert(s != NULL, "checking");
   192   for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
   193     if (s == _type_signatures[i]) {
   194       return (BasicType)i;
   195     }
   196   }
   197   return T_OBJECT;
   198 }
   201 static int mid_hint = (int)vmSymbols::FIRST_SID+1;
   203 #ifndef PRODUCT
   204 static int find_sid_calls, find_sid_probes;
   205 // (Typical counts are calls=7000 and probes=17000.)
   206 #endif
   208 vmSymbols::SID vmSymbols::find_sid(symbolOop symbol) {
   209   // Handle the majority of misses by a bounds check.
   210   // Then, use a binary search over the index.
   211   // Expected trip count is less than log2_SID_LIMIT, about eight.
   212   // This is slow but acceptable, given that calls are not
   213   // dynamically common.  (methodOop::intrinsic_id has a cache.)
   214   NOT_PRODUCT(find_sid_calls++);
   215   int min = (int)FIRST_SID, max = (int)SID_LIMIT - 1;
   216   SID sid = NO_SID, sid1;
   217   int cmp1;
   218   sid1 = vm_symbol_index[min];
   219   cmp1 = compare_symbol(symbol, symbol_at(sid1));
   220   if (cmp1 <= 0) {              // before the first
   221     if (cmp1 == 0)  sid = sid1;
   222   } else {
   223     sid1 = vm_symbol_index[max];
   224     cmp1 = compare_symbol(symbol, symbol_at(sid1));
   225     if (cmp1 >= 0) {            // after the last
   226       if (cmp1 == 0)  sid = sid1;
   227     } else {
   228       // After checking the extremes, do a binary search.
   229       ++min; --max;             // endpoints are done
   230       int mid = mid_hint;       // start at previous success
   231       while (max >= min) {
   232         assert(mid >= min && mid <= max, "");
   233         NOT_PRODUCT(find_sid_probes++);
   234         sid1 = vm_symbol_index[mid];
   235         cmp1 = compare_symbol(symbol, symbol_at(sid1));
   236         if (cmp1 == 0) {
   237           mid_hint = mid;
   238           sid = sid1;
   239           break;
   240         }
   241         if (cmp1 < 0)
   242           max = mid - 1;        // symbol < symbol_at(sid)
   243         else
   244           min = mid + 1;
   246         // Pick a new probe point:
   247         mid = (max + min) / 2;
   248       }
   249     }
   250   }
   252 #ifdef ASSERT
   253   // Perform the exhaustive self-check the first 1000 calls,
   254   // and every 100 calls thereafter.
   255   static int find_sid_check_count = -2000;
   256   if ((uint)++find_sid_check_count > (uint)100) {
   257     if (find_sid_check_count > 0)  find_sid_check_count = 0;
   259     // Make sure this is the right answer, using linear search.
   260     // (We have already proven that there are no duplicates in the list.)
   261     SID sid2 = NO_SID;
   262     for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   263       symbolOop sym2 = symbol_at((SID)index);
   264       if (sym2 == symbol) {
   265         sid2 = (SID)index;
   266         break;
   267       }
   268     }
   269     // Unless it's a duplicate, assert that the sids are the same.
   270     if (_symbols[sid] != _symbols[sid2]) {
   271       assert(sid == sid2, "binary same as linear search");
   272     }
   273   }
   274 #endif //ASSERT
   276   return sid;
   277 }
   279 static vmIntrinsics::ID wrapper_intrinsic(BasicType type, bool unboxing) {
   280 #define TYPE2(type, unboxing) ((int)(type)*2 + ((unboxing) ? 1 : 0))
   281   switch (TYPE2(type, unboxing)) {
   282 #define BASIC_TYPE_CASE(type, box, unbox) \
   283     case TYPE2(type, false):  return vmIntrinsics::box; \
   284     case TYPE2(type, true):   return vmIntrinsics::unbox
   285     BASIC_TYPE_CASE(T_BOOLEAN, _Boolean_valueOf,   _booleanValue);
   286     BASIC_TYPE_CASE(T_BYTE,    _Byte_valueOf,      _byteValue);
   287     BASIC_TYPE_CASE(T_CHAR,    _Character_valueOf, _charValue);
   288     BASIC_TYPE_CASE(T_SHORT,   _Short_valueOf,     _shortValue);
   289     BASIC_TYPE_CASE(T_INT,     _Integer_valueOf,   _intValue);
   290     BASIC_TYPE_CASE(T_LONG,    _Long_valueOf,      _longValue);
   291     BASIC_TYPE_CASE(T_FLOAT,   _Float_valueOf,     _floatValue);
   292     BASIC_TYPE_CASE(T_DOUBLE,  _Double_valueOf,    _doubleValue);
   293 #undef BASIC_TYPE_CASE
   294   }
   295 #undef TYPE2
   296   return vmIntrinsics::_none;
   297 }
   299 vmIntrinsics::ID vmIntrinsics::for_boxing(BasicType type) {
   300   return wrapper_intrinsic(type, false);
   301 }
   302 vmIntrinsics::ID vmIntrinsics::for_unboxing(BasicType type) {
   303   return wrapper_intrinsic(type, true);
   304 }
   306 vmIntrinsics::ID vmIntrinsics::for_raw_conversion(BasicType src, BasicType dest) {
   307 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d))
   308   switch (SRC_DEST(src, dest)) {
   309   case SRC_DEST(T_INT, T_FLOAT):   return vmIntrinsics::_intBitsToFloat;
   310   case SRC_DEST(T_FLOAT, T_INT):   return vmIntrinsics::_floatToRawIntBits;
   312   case SRC_DEST(T_LONG, T_DOUBLE): return vmIntrinsics::_longBitsToDouble;
   313   case SRC_DEST(T_DOUBLE, T_LONG): return vmIntrinsics::_doubleToRawLongBits;
   314   }
   315 #undef SRC_DEST
   317   return vmIntrinsics::_none;
   318 }
   320 methodOop vmIntrinsics::method_for(vmIntrinsics::ID id) {
   321   if (id == _none)  return NULL;
   322   symbolOop cname = vmSymbols::symbol_at(class_for(id));
   323   symbolOop mname = vmSymbols::symbol_at(name_for(id));
   324   symbolOop msig  = vmSymbols::symbol_at(signature_for(id));
   325   if (cname == NULL || mname == NULL || msig == NULL)  return NULL;
   326   klassOop k = SystemDictionary::find_well_known_klass(cname);
   327   if (k == NULL)  return NULL;
   328   return instanceKlass::cast(k)->find_method(mname, msig);
   329 }
   332 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
   333 static const char* vm_intrinsic_name_bodies =
   334   VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
   335                    VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
   337 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT];
   339 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
   340   const char** nt = &vm_intrinsic_name_table[0];
   341   if (nt[_none] == NULL) {
   342     char* string = (char*) &vm_intrinsic_name_bodies[0];
   343     for (int index = FIRST_ID; index < ID_LIMIT; index++) {
   344       nt[index] = string;
   345       string += strlen(string); // skip string body
   346       string += 1;              // skip trailing null
   347     }
   348     assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up");
   349     nt[_none] = "_none";
   350   }
   351   if ((uint)id < (uint)ID_LIMIT)
   352     return vm_intrinsic_name_table[(uint)id];
   353   else
   354     return "(unknown intrinsic)";
   355 }
   357 // These are flag-matching functions:
   358 inline bool match_F_R(jshort flags) {
   359   const int req = 0;
   360   const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
   361   return (flags & (req | neg)) == req;
   362 }
   363 inline bool match_F_Y(jshort flags) {
   364   const int req = JVM_ACC_SYNCHRONIZED;
   365   const int neg = JVM_ACC_STATIC;
   366   return (flags & (req | neg)) == req;
   367 }
   368 inline bool match_F_RN(jshort flags) {
   369   const int req = JVM_ACC_NATIVE;
   370   const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
   371   return (flags & (req | neg)) == req;
   372 }
   373 inline bool match_F_S(jshort flags) {
   374   const int req = JVM_ACC_STATIC;
   375   const int neg = JVM_ACC_SYNCHRONIZED;
   376   return (flags & (req | neg)) == req;
   377 }
   378 inline bool match_F_SN(jshort flags) {
   379   const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE;
   380   const int neg = JVM_ACC_SYNCHRONIZED;
   381   return (flags & (req | neg)) == req;
   382 }
   383 inline bool match_F_RNY(jshort flags) {
   384   const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED;
   385   const int neg = JVM_ACC_STATIC;
   386   return (flags & (req | neg)) == req;
   387 }
   389 // These are for forming case labels:
   390 #define ID3(x, y, z) (( jlong)(z) +                                  \
   391                       ((jlong)(y) <<    vmSymbols::log2_SID_LIMIT) + \
   392                       ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT))  )
   393 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n)
   395 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder,
   396                                             vmSymbols::SID name,
   397                                             vmSymbols::SID sig,
   398                                             jshort flags) {
   399   assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
   401   // Let the C compiler build the decision tree.
   403 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
   404   case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
   405     if (!match_##fcode(flags))  break; \
   406     return id;
   408   switch (ID3(holder, name, sig)) {
   409     VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
   410                      VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
   411   }
   412   return vmIntrinsics::_none;
   414 #undef VM_INTRINSIC_CASE
   415 }
   418 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
   419   const char* str = name_at(id);
   420 #ifndef PRODUCT
   421   const char* kname = vmSymbols::name_for(class_for(id));
   422   const char* mname = vmSymbols::name_for(name_for(id));
   423   const char* sname = vmSymbols::name_for(signature_for(id));
   424   const char* fname = "";
   425   switch (flags_for(id)) {
   426   case F_Y:  fname = "synchronized ";  break;
   427   case F_RN: fname = "native ";        break;
   428   case F_SN: fname = "native static "; break;
   429   case F_S:  fname = "static ";        break;
   430   case F_RNY:fname = "native synchronized "; break;
   431   }
   432   const char* kptr = strrchr(kname, '/');
   433   if (kptr != NULL)  kname = kptr + 1;
   434   int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
   435                          str, fname, kname, mname, sname);
   436   if (len < buflen)
   437     str = buf;
   438 #endif //PRODUCT
   439   return str;
   440 }
   443 // These are to get information about intrinsics.
   445 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
   447 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = {
   448 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
   449   ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
   451   0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
   452                      VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
   453     0
   454 #undef VM_INTRINSIC_INFO
   455 };
   457 inline jlong intrinsic_info(vmIntrinsics::ID id) {
   458   return intrinsic_info_array[vmIntrinsics::ID_from((int)id)];
   459 }
   461 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) {
   462   jlong info = intrinsic_info(id);
   463   int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
   464   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, "");
   465   return vmSymbols::SID( (info >> shift) & mask );
   466 }
   468 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) {
   469   jlong info = intrinsic_info(id);
   470   int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
   471   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, "");
   472   return vmSymbols::SID( (info >> shift) & mask );
   473 }
   475 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
   476   jlong info = intrinsic_info(id);
   477   int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
   478   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, "");
   479   return vmSymbols::SID( (info >> shift) & mask );
   480 }
   482 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
   483   jlong info = intrinsic_info(id);
   484   int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
   485   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, "");
   486   return Flags( (info >> shift) & mask );
   487 }
   490 #ifndef PRODUCT
   491 // verify_method performs an extra check on a matched intrinsic method
   493 static bool match_method(methodOop m, symbolOop n, symbolOop s) {
   494   return (m->name() == n &&
   495           m->signature() == s);
   496 }
   498 static vmIntrinsics::ID match_method_with_klass(methodOop m, symbolOop mk) {
   499 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \
   500   { symbolOop k = vmSymbols::klassname(); \
   501     if (mk == k) { \
   502       symbolOop n = vmSymbols::namepart(); \
   503       symbolOop s = vmSymbols::sigpart(); \
   504       if (match_method(m, n, s)) \
   505         return vmIntrinsics::id; \
   506     } }
   507   VM_INTRINSICS_DO(VM_INTRINSIC_MATCH,
   508                    VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
   509   return vmIntrinsics::_none;
   510 #undef VM_INTRINSIC_MATCH
   511 }
   513 void vmIntrinsics::verify_method(ID actual_id, methodOop m) {
   514   symbolOop mk = Klass::cast(m->method_holder())->name();
   515   ID declared_id = match_method_with_klass(m, mk);
   517   if (declared_id == actual_id)  return; // success
   519   if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) {
   520     // Here are a few special cases in StrictMath not declared in vmSymbols.hpp.
   521     switch (actual_id) {
   522     case _min:
   523     case _max:
   524     case _dsqrt:
   525       declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math());
   526       if (declared_id == actual_id)  return; // acceptable alias
   527       break;
   528     }
   529   }
   531   const char* declared_name = name_at(declared_id);
   532   const char* actual_name   = name_at(actual_id);
   533   methodHandle mh = m;
   534   m = NULL;
   535   ttyLocker ttyl;
   536   if (xtty != NULL) {
   537     xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'",
   538                      actual_name, declared_name);
   539     xtty->method(mh);
   540     xtty->end_elem("");
   541   }
   542   if (PrintMiscellaneous && (WizardMode || Verbose)) {
   543     tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):",
   544                   declared_name, declared_id, actual_name, actual_id);
   545     mh()->print_short_name(tty);
   546     tty->cr();
   547   }
   548 }
   549 #endif //PRODUCT

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