src/share/vm/classfile/vmSymbols.cpp

Tue, 08 Feb 2011 09:11:37 -0800

author
mchung
date
Tue, 08 Feb 2011 09:11:37 -0800
changeset 2518
f36c9fe788b8
parent 2497
3582bf76420e
child 2638
72dee110246f
permissions
-rw-r--r--

7017673: Remove setting of the sun.jkernel.DownloadManager as a boot classloader hook
Reviewed-by: alanb, dcubed, coleenp

     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 Symbol* vmSymbols::_symbols[vmSymbols::SID_LIMIT];
    35 Symbol* vmSymbols::_type_signatures[T_VOID+1] = { NULL /*, NULL...*/ };
    37 inline int compare_symbol(Symbol* a, Symbol* 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     Symbol* a = vmSymbols::symbol_at(*((vmSymbols::SID*) void_a));
    47     Symbol* 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       Symbol* sym = SymbolTable::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     Symbol* 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     TempNewSymbol jlo = SymbolTable::new_symbol(str, CHECK);
   132     assert(strncmp(str, (char*)jlo->base(), jlo->utf8_length()) == 0, "");
   133     assert(jlo == java_lang_Object(), "");
   134     SID sid = VM_SYMBOL_ENUM_NAME(java_lang_Object);
   135     assert(find_sid(jlo) == sid, "");
   136     assert(symbol_at(sid) == jlo, "");
   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       Symbol* 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     TempNewSymbol fmt = SymbolTable::new_symbol(str, CHECK);
   151     sid = find_sid(fmt);
   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::symbols_do(SymbolClosure* f) {
   176   for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   177     f->do_symbol(&_symbols[index]);
   178   }
   179   for (int i = 0; i < T_VOID+1; i++) {
   180     f->do_symbol(&_type_signatures[i]);
   181   }
   182 }
   184 void vmSymbols::serialize(SerializeOopClosure* soc) {
   185   soc->do_region((u_char*)&_symbols[FIRST_SID],
   186                  (SID_LIMIT - FIRST_SID) * sizeof(_symbols[0]));
   187   soc->do_region((u_char*)_type_signatures, sizeof(_type_signatures));
   188 }
   191 BasicType vmSymbols::signature_type(Symbol* s) {
   192   assert(s != NULL, "checking");
   193   for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
   194     if (s == _type_signatures[i]) {
   195       return (BasicType)i;
   196     }
   197   }
   198   return T_OBJECT;
   199 }
   202 static int mid_hint = (int)vmSymbols::FIRST_SID+1;
   204 #ifndef PRODUCT
   205 static int find_sid_calls, find_sid_probes;
   206 // (Typical counts are calls=7000 and probes=17000.)
   207 #endif
   209 vmSymbols::SID vmSymbols::find_sid(Symbol* symbol) {
   210   // Handle the majority of misses by a bounds check.
   211   // Then, use a binary search over the index.
   212   // Expected trip count is less than log2_SID_LIMIT, about eight.
   213   // This is slow but acceptable, given that calls are not
   214   // dynamically common.  (methodOop::intrinsic_id has a cache.)
   215   NOT_PRODUCT(find_sid_calls++);
   216   int min = (int)FIRST_SID, max = (int)SID_LIMIT - 1;
   217   SID sid = NO_SID, sid1;
   218   int cmp1;
   219   sid1 = vm_symbol_index[min];
   220   cmp1 = compare_symbol(symbol, symbol_at(sid1));
   221   if (cmp1 <= 0) {              // before the first
   222     if (cmp1 == 0)  sid = sid1;
   223   } else {
   224     sid1 = vm_symbol_index[max];
   225     cmp1 = compare_symbol(symbol, symbol_at(sid1));
   226     if (cmp1 >= 0) {            // after the last
   227       if (cmp1 == 0)  sid = sid1;
   228     } else {
   229       // After checking the extremes, do a binary search.
   230       ++min; --max;             // endpoints are done
   231       int mid = mid_hint;       // start at previous success
   232       while (max >= min) {
   233         assert(mid >= min && mid <= max, "");
   234         NOT_PRODUCT(find_sid_probes++);
   235         sid1 = vm_symbol_index[mid];
   236         cmp1 = compare_symbol(symbol, symbol_at(sid1));
   237         if (cmp1 == 0) {
   238           mid_hint = mid;
   239           sid = sid1;
   240           break;
   241         }
   242         if (cmp1 < 0)
   243           max = mid - 1;        // symbol < symbol_at(sid)
   244         else
   245           min = mid + 1;
   247         // Pick a new probe point:
   248         mid = (max + min) / 2;
   249       }
   250     }
   251   }
   253 #ifdef ASSERT
   254   // Perform the exhaustive self-check the first 1000 calls,
   255   // and every 100 calls thereafter.
   256   static int find_sid_check_count = -2000;
   257   if ((uint)++find_sid_check_count > (uint)100) {
   258     if (find_sid_check_count > 0)  find_sid_check_count = 0;
   260     // Make sure this is the right answer, using linear search.
   261     // (We have already proven that there are no duplicates in the list.)
   262     SID sid2 = NO_SID;
   263     for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
   264       Symbol* sym2 = symbol_at((SID)index);
   265       if (sym2 == symbol) {
   266         sid2 = (SID)index;
   267         break;
   268       }
   269     }
   270     // Unless it's a duplicate, assert that the sids are the same.
   271     if (_symbols[sid] != _symbols[sid2]) {
   272       assert(sid == sid2, "binary same as linear search");
   273     }
   274   }
   275 #endif //ASSERT
   277   return sid;
   278 }
   280 static vmIntrinsics::ID wrapper_intrinsic(BasicType type, bool unboxing) {
   281 #define TYPE2(type, unboxing) ((int)(type)*2 + ((unboxing) ? 1 : 0))
   282   switch (TYPE2(type, unboxing)) {
   283 #define BASIC_TYPE_CASE(type, box, unbox) \
   284     case TYPE2(type, false):  return vmIntrinsics::box; \
   285     case TYPE2(type, true):   return vmIntrinsics::unbox
   286     BASIC_TYPE_CASE(T_BOOLEAN, _Boolean_valueOf,   _booleanValue);
   287     BASIC_TYPE_CASE(T_BYTE,    _Byte_valueOf,      _byteValue);
   288     BASIC_TYPE_CASE(T_CHAR,    _Character_valueOf, _charValue);
   289     BASIC_TYPE_CASE(T_SHORT,   _Short_valueOf,     _shortValue);
   290     BASIC_TYPE_CASE(T_INT,     _Integer_valueOf,   _intValue);
   291     BASIC_TYPE_CASE(T_LONG,    _Long_valueOf,      _longValue);
   292     BASIC_TYPE_CASE(T_FLOAT,   _Float_valueOf,     _floatValue);
   293     BASIC_TYPE_CASE(T_DOUBLE,  _Double_valueOf,    _doubleValue);
   294 #undef BASIC_TYPE_CASE
   295   }
   296 #undef TYPE2
   297   return vmIntrinsics::_none;
   298 }
   300 vmIntrinsics::ID vmIntrinsics::for_boxing(BasicType type) {
   301   return wrapper_intrinsic(type, false);
   302 }
   303 vmIntrinsics::ID vmIntrinsics::for_unboxing(BasicType type) {
   304   return wrapper_intrinsic(type, true);
   305 }
   307 vmIntrinsics::ID vmIntrinsics::for_raw_conversion(BasicType src, BasicType dest) {
   308 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d))
   309   switch (SRC_DEST(src, dest)) {
   310   case SRC_DEST(T_INT, T_FLOAT):   return vmIntrinsics::_intBitsToFloat;
   311   case SRC_DEST(T_FLOAT, T_INT):   return vmIntrinsics::_floatToRawIntBits;
   313   case SRC_DEST(T_LONG, T_DOUBLE): return vmIntrinsics::_longBitsToDouble;
   314   case SRC_DEST(T_DOUBLE, T_LONG): return vmIntrinsics::_doubleToRawLongBits;
   315   }
   316 #undef SRC_DEST
   318   return vmIntrinsics::_none;
   319 }
   321 methodOop vmIntrinsics::method_for(vmIntrinsics::ID id) {
   322   if (id == _none)  return NULL;
   323   Symbol* cname = vmSymbols::symbol_at(class_for(id));
   324   Symbol* mname = vmSymbols::symbol_at(name_for(id));
   325   Symbol* msig  = vmSymbols::symbol_at(signature_for(id));
   326   if (cname == NULL || mname == NULL || msig == NULL)  return NULL;
   327   klassOop k = SystemDictionary::find_well_known_klass(cname);
   328   if (k == NULL)  return NULL;
   329   return instanceKlass::cast(k)->find_method(mname, msig);
   330 }
   333 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
   334 static const char* vm_intrinsic_name_bodies =
   335   VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
   336                    VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
   338 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT];
   340 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
   341   const char** nt = &vm_intrinsic_name_table[0];
   342   if (nt[_none] == NULL) {
   343     char* string = (char*) &vm_intrinsic_name_bodies[0];
   344     for (int index = FIRST_ID; index < ID_LIMIT; index++) {
   345       nt[index] = string;
   346       string += strlen(string); // skip string body
   347       string += 1;              // skip trailing null
   348     }
   349     assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up");
   350     nt[_none] = "_none";
   351   }
   352   if ((uint)id < (uint)ID_LIMIT)
   353     return vm_intrinsic_name_table[(uint)id];
   354   else
   355     return "(unknown intrinsic)";
   356 }
   358 // These are flag-matching functions:
   359 inline bool match_F_R(jshort flags) {
   360   const int req = 0;
   361   const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
   362   return (flags & (req | neg)) == req;
   363 }
   364 inline bool match_F_Y(jshort flags) {
   365   const int req = JVM_ACC_SYNCHRONIZED;
   366   const int neg = JVM_ACC_STATIC;
   367   return (flags & (req | neg)) == req;
   368 }
   369 inline bool match_F_RN(jshort flags) {
   370   const int req = JVM_ACC_NATIVE;
   371   const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
   372   return (flags & (req | neg)) == req;
   373 }
   374 inline bool match_F_S(jshort flags) {
   375   const int req = JVM_ACC_STATIC;
   376   const int neg = JVM_ACC_SYNCHRONIZED;
   377   return (flags & (req | neg)) == req;
   378 }
   379 inline bool match_F_SN(jshort flags) {
   380   const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE;
   381   const int neg = JVM_ACC_SYNCHRONIZED;
   382   return (flags & (req | neg)) == req;
   383 }
   384 inline bool match_F_RNY(jshort flags) {
   385   const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED;
   386   const int neg = JVM_ACC_STATIC;
   387   return (flags & (req | neg)) == req;
   388 }
   390 // These are for forming case labels:
   391 #define ID3(x, y, z) (( jlong)(z) +                                  \
   392                       ((jlong)(y) <<    vmSymbols::log2_SID_LIMIT) + \
   393                       ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT))  )
   394 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n)
   396 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder,
   397                                             vmSymbols::SID name,
   398                                             vmSymbols::SID sig,
   399                                             jshort flags) {
   400   assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
   402   // Let the C compiler build the decision tree.
   404 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
   405   case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
   406     if (!match_##fcode(flags))  break; \
   407     return id;
   409   switch (ID3(holder, name, sig)) {
   410     VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
   411                      VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
   412   }
   413   return vmIntrinsics::_none;
   415 #undef VM_INTRINSIC_CASE
   416 }
   419 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
   420   const char* str = name_at(id);
   421 #ifndef PRODUCT
   422   const char* kname = vmSymbols::name_for(class_for(id));
   423   const char* mname = vmSymbols::name_for(name_for(id));
   424   const char* sname = vmSymbols::name_for(signature_for(id));
   425   const char* fname = "";
   426   switch (flags_for(id)) {
   427   case F_Y:  fname = "synchronized ";  break;
   428   case F_RN: fname = "native ";        break;
   429   case F_SN: fname = "native static "; break;
   430   case F_S:  fname = "static ";        break;
   431   case F_RNY:fname = "native synchronized "; break;
   432   }
   433   const char* kptr = strrchr(kname, '/');
   434   if (kptr != NULL)  kname = kptr + 1;
   435   int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
   436                          str, fname, kname, mname, sname);
   437   if (len < buflen)
   438     str = buf;
   439 #endif //PRODUCT
   440   return str;
   441 }
   444 // These are to get information about intrinsics.
   446 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
   448 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = {
   449 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
   450   ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
   452   0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
   453                      VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
   454     0
   455 #undef VM_INTRINSIC_INFO
   456 };
   458 inline jlong intrinsic_info(vmIntrinsics::ID id) {
   459   return intrinsic_info_array[vmIntrinsics::ID_from((int)id)];
   460 }
   462 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) {
   463   jlong info = intrinsic_info(id);
   464   int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
   465   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, "");
   466   return vmSymbols::SID( (info >> shift) & mask );
   467 }
   469 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) {
   470   jlong info = intrinsic_info(id);
   471   int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
   472   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, "");
   473   return vmSymbols::SID( (info >> shift) & mask );
   474 }
   476 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
   477   jlong info = intrinsic_info(id);
   478   int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
   479   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, "");
   480   return vmSymbols::SID( (info >> shift) & mask );
   481 }
   483 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
   484   jlong info = intrinsic_info(id);
   485   int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
   486   assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, "");
   487   return Flags( (info >> shift) & mask );
   488 }
   491 #ifndef PRODUCT
   492 // verify_method performs an extra check on a matched intrinsic method
   494 static bool match_method(methodOop m, Symbol* n, Symbol* s) {
   495   return (m->name() == n &&
   496           m->signature() == s);
   497 }
   499 static vmIntrinsics::ID match_method_with_klass(methodOop m, Symbol* mk) {
   500 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \
   501   { Symbol* k = vmSymbols::klassname(); \
   502     if (mk == k) { \
   503       Symbol* n = vmSymbols::namepart(); \
   504       Symbol* s = vmSymbols::sigpart(); \
   505       if (match_method(m, n, s)) \
   506         return vmIntrinsics::id; \
   507     } }
   508   VM_INTRINSICS_DO(VM_INTRINSIC_MATCH,
   509                    VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
   510   return vmIntrinsics::_none;
   511 #undef VM_INTRINSIC_MATCH
   512 }
   514 void vmIntrinsics::verify_method(ID actual_id, methodOop m) {
   515   Symbol* mk = Klass::cast(m->method_holder())->name();
   516   ID declared_id = match_method_with_klass(m, mk);
   518   if (declared_id == actual_id)  return; // success
   520   if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) {
   521     // Here are a few special cases in StrictMath not declared in vmSymbols.hpp.
   522     switch (actual_id) {
   523     case _min:
   524     case _max:
   525     case _dsqrt:
   526       declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math());
   527       if (declared_id == actual_id)  return; // acceptable alias
   528       break;
   529     }
   530   }
   532   const char* declared_name = name_at(declared_id);
   533   const char* actual_name   = name_at(actual_id);
   534   methodHandle mh = m;
   535   m = NULL;
   536   ttyLocker ttyl;
   537   if (xtty != NULL) {
   538     xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'",
   539                      actual_name, declared_name);
   540     xtty->method(mh);
   541     xtty->end_elem("");
   542   }
   543   if (PrintMiscellaneous && (WizardMode || Verbose)) {
   544     tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):",
   545                   declared_name, declared_id, actual_name, actual_id);
   546     mh()->print_short_name(tty);
   547     tty->cr();
   548   }
   549 }
   550 #endif //PRODUCT

mercurial