graal-compiler: src/share/vm/oops/symbolKlass.cpp comparison

comparison src/share/vm/oops/symbolKlass.cpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	2a1a77d3458f

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+:a61af66fc99e
+/*
+* 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 > hg > graal-compiler

comparison src/share/vm/oops/symbolKlass.cpp @ 0:a61af66fc99e jdk7-b24