jdk8-mips64-public/hotspot: src/share/vm/oops/symbolKlass.cpp@75b0f3cb1943 (annotated)

src/share/vm/oops/symbolKlass.cpp@75b0f3cb1943 (annotated)

src/share/vm/oops/symbolKlass.cpp

Thu, 13 Mar 2008 14:17:48 -0700

author: dcubed
date: Thu, 13 Mar 2008 14:17:48 -0700
changeset 487: 75b0f3cb1943
parent 435: a61af66fc99e
child 657: 2a1a77d3458f
permissions: -rw-r--r--

Merge

 /*
  * Copyright 1997-2006 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 # include "incls/_precompiled.incl"
 # include "incls/_symbolKlass.cpp.incl"
 symbolOop symbolKlass::allocate_symbol(u1* name, int len, TRAPS) {
   // Don't allow symbol oops to be created which cannot fit in a symbolOop.
   if (len > symbolOopDesc::max_length()) {
     THROW_MSG_0(vmSymbols::java_lang_InternalError(),
                 "name is too long to represent");
   }
   int size = symbolOopDesc::object_size(len);
   symbolKlassHandle h_k(THREAD, as_klassOop());
   symbolOop sym = (symbolOop)
     CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);
   assert(!sym->is_parsable(), "not expecting parsability yet.");
   No_Safepoint_Verifier no_safepoint;
   sym->set_utf8_length(len);
   for (int i = 0; i < len; i++) {
     sym->byte_at_put(i, name[i]);
   }
   // Let the first emptySymbol be created and
   // ensure only one is ever created.
   assert(sym->is_parsable() || Universe::emptySymbol() == NULL,
          "should be parsable here.");
   return sym;
 }
 bool symbolKlass::allocate_symbols(int names_count, const char** names,
                                    int* lengths, symbolOop* sym_oops, TRAPS) {
   if (UseConcMarkSweepGC || UseParallelGC) {
     // Concurrent GC needs to mark all the allocated symbol oops after
     // the remark phase which isn't done below (except the first symbol oop).
     // So return false which will let the symbols be allocated one by one.
     // The parallel collector uses an object start array to find the
     // start of objects on a dirty card.  The object start array is not
     // updated for the start of each symbol so is not precise.  During
     // object array verification this causes a verification failure.
     // In a product build this causes extra searching for the start of
     // a symbol.  As with the concurrent collector a return of false will
     // cause each symbol to be allocated separately and in the case
     // of the parallel collector will cause the object
     // start array to be updated.
     return false;
   }
   assert(names_count > 0, "can't allocate 0 symbols");
   int total_size = 0;
   int i, sizes[SymbolTable::symbol_alloc_batch_size];
   for (i=0; i<names_count; i++) {
     int len = lengths[i];
     if (len > symbolOopDesc::max_length()) {
       return false;
     }
     int sz = symbolOopDesc::object_size(len);
     sizes[i] = sz * HeapWordSize;
     total_size += sz;
   }
   symbolKlassHandle h_k(THREAD, as_klassOop());
   HeapWord* base = Universe::heap()->permanent_mem_allocate(total_size);
   if (base == NULL) {
     return false;
   }
   // CAN'T take any safepoint during the initialization of the symbol oops !
   No_Safepoint_Verifier nosafepoint;
   klassOop sk = h_k();
   int pos = 0;
   for (i=0; i<names_count; i++) {
     symbolOop s = (symbolOop) (((char*)base) + pos);
     s->set_mark(markOopDesc::prototype());
     s->set_klass(sk);
     s->set_utf8_length(lengths[i]);
     const char* name = names[i];
     for (int j=0; j<lengths[i]; j++) {
       s->byte_at_put(j, name[j]);
     }
     assert(s->is_parsable(), "should be parsable here.");
     sym_oops[i] = s;
     pos += sizes[i];
   }
   return true;
 }
 klassOop symbolKlass::create_klass(TRAPS) {
   symbolKlass o;
   KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
   KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL);
   // Make sure size calculation is right
   assert(k()->size() == align_object_size(header_size()), "wrong size for object");
 //  java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
   return k();
 }
 int symbolKlass::oop_size(oop obj) const {
   assert(obj->is_symbol(),"must be a symbol");
   symbolOop s = symbolOop(obj);
   int size = s->object_size();
   return size;
 }
 bool symbolKlass::oop_is_parsable(oop obj) const {
   assert(obj->is_symbol(),"must be a symbol");
   symbolOop s = symbolOop(obj);
   return s->object_is_parsable();
 }
 void symbolKlass::oop_follow_contents(oop obj) {
   assert (obj->is_symbol(), "object must be symbol");
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::symbolKlassObj never moves.
   // Note: do not follow next link here (see SymbolTable::follow_contents)
 }
 #ifndef SERIALGC
 void symbolKlass::oop_follow_contents(ParCompactionManager* cm, oop obj) {
   assert (obj->is_symbol(), "object must be symbol");
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::symbolKlassObj never moves.
   // Note: do not follow next link here (see SymbolTable::follow_contents)
 }
 #endif // SERIALGC
 int symbolKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
   assert(obj->is_symbol(), "object must be symbol");
   symbolOop s = symbolOop(obj);
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = s->object_size();
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::symbolKlassObj never moves.
   return size;
 }
 int symbolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
   assert(obj->is_symbol(), "object must be symbol");
   symbolOop s = symbolOop(obj);
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = s->object_size();
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::symbolKlassObj never moves.
   return size;
 }
 int symbolKlass::oop_adjust_pointers(oop obj) {
   assert(obj->is_symbol(), "should be symbol");
   symbolOop s = symbolOop(obj);
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = s->object_size();
   // Performance tweak: We skip iterating over the klass pointer since we
   // know that Universe::symbolKlassObj never moves.
   return size;
 }
 #ifndef SERIALGC
 void symbolKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) {
   assert(obj->is_symbol(), "should be symbol");
 }
 void symbolKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
   assert(obj->is_symbol(), "should be symbol");
 }
 int symbolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   assert(obj->is_symbol(), "should be symbol");
   return symbolOop(obj)->object_size();
 }
 int symbolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
                                      HeapWord* beg_addr, HeapWord* end_addr) {
   assert(obj->is_symbol(), "should be symbol");
   return symbolOop(obj)->object_size();
 }
 #endif // SERIALGC
 #ifndef PRODUCT
 // Printing
 void symbolKlass::oop_print_on(oop obj, outputStream* st) {
   st->print("Symbol: '");
   symbolOop sym = symbolOop(obj);
   for (int i = 0; i < sym->utf8_length(); i++) {
     st->print("%c", sym->byte_at(i));
   }
   st->print("'");
 }
 void symbolKlass::oop_print_value_on(oop obj, outputStream* st) {
   symbolOop sym = symbolOop(obj);
   st->print("'");
   for (int i = 0; i < sym->utf8_length(); i++) {
     st->print("%c", sym->byte_at(i));
   }
   st->print("'");
 }
 #endif //PRODUCT
 const char* symbolKlass::internal_name() const {
   return "{symbol}";
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/symbolKlass.cpp@75b0f3cb1943 (annotated)

src/share/vm/oops/symbolKlass.cpp