duke@435: /*
xdono@631:  * Copyright 2003-2008 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: # include "incls/_precompiled.incl"
duke@435: # include "incls/_restore.cpp.incl"
duke@435: 
duke@435: 
duke@435: // Closure for serializing initialization data in from a data area
duke@435: // (oop_array) read from the shared file.
duke@435: 
duke@435: class ReadClosure : public SerializeOopClosure {
duke@435: private:
duke@435:   oop** _oop_array;
duke@435: 
duke@435:   inline oop nextOop() {
duke@435:     return *(*_oop_array)++;
duke@435:   }
duke@435: 
duke@435: public:
duke@435:   ReadClosure(oop** oop_array) { _oop_array = oop_array; }
duke@435: 
duke@435:   void do_oop(oop* p) {
duke@435:     assert(SharedSkipVerify || *p == NULL || *p == Universe::klassKlassObj(),
duke@435:            "initializing previously initialized oop.");
duke@435:     oop obj = nextOop();
duke@435:     assert(SharedSkipVerify || (intptr_t)obj >= 0 || (intptr_t)obj < -100,
duke@435:            "hit tag while initializing oops.");
duke@435:     assert(SharedSkipVerify || obj->is_oop_or_null(), "invalid oop");
duke@435:     *p = obj;
duke@435:   }
duke@435: 
coleenp@548:   void do_oop(narrowOop* p) { ShouldNotReachHere(); }
coleenp@548: 
duke@435:   void do_ptr(void** p) {
duke@435:     assert(*p == NULL, "initializing previous initialized pointer.");
duke@435:     void* obj = nextOop();
duke@435:     assert((intptr_t)obj >= 0 || (intptr_t)obj < -100,
duke@435:            "hit tag while initializing ptrs.");
duke@435:     *p = obj;
duke@435:   }
duke@435: 
duke@435:   void do_ptr(HeapWord** p) { do_ptr((void **) p); }
duke@435: 
duke@435:   void do_int(int* p) {
duke@435:     *p = (int)(intptr_t)nextOop();
duke@435:   }
duke@435: 
duke@435:   void do_size_t(size_t* p) {
duke@435:     // Assumes that size_t and pointers are the same size.
duke@435:     *p = (size_t)nextOop();
duke@435:   }
duke@435: 
duke@435:   void do_tag(int tag) {
duke@435:     int old_tag;
duke@435:     do_int(&old_tag);
duke@435:     FileMapInfo::assert_mark(tag == old_tag);
duke@435:   }
duke@435: 
duke@435:   void do_region(u_char* start, size_t size) {
duke@435:     assert((intptr_t)start % sizeof(oop) == 0, "bad alignment");
duke@435:     assert(size % sizeof(oop) == 0, "bad size");
duke@435:     do_tag((int)size);
duke@435:     while (size > 0) {
duke@435:       *(oop*)start = nextOop();
duke@435:       start += sizeof(oop);
duke@435:       size -= sizeof(oop);
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   bool reading() const { return true; }
duke@435: };
duke@435: 
duke@435: 
duke@435: // Read the oop and miscellaneous data from the shared file, and
duke@435: // serialize it out to its various destinations.
duke@435: 
duke@435: void CompactingPermGenGen::initialize_oops() {
duke@435:   FileMapInfo *mapinfo = FileMapInfo::current_info();
duke@435: 
duke@435:   char* buffer = mapinfo->region_base(md);
duke@435: 
duke@435:   // Skip over (reserve space for) a list of addresses of C++ vtables
duke@435:   // for Klass objects.  They get filled in later.
duke@435: 
duke@435:   // Skip over (reserve space for) dummy C++ vtables Klass objects.
duke@435:   // They are used as is.
duke@435: 
duke@435:   void** vtbl_list = (void**)buffer;
duke@435:   buffer += vtbl_list_size * sizeof(void*);
duke@435:   intptr_t vtable_size = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   buffer += vtable_size;
duke@435: 
duke@435:   // Create the symbol table using the bucket array at this spot in the
duke@435:   // misc data space.  Since the symbol table is often modified, this
duke@435:   // region (of mapped pages) will be copy-on-write.
duke@435: 
duke@435:   int symbolTableLen = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   int number_of_entries = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   SymbolTable::create_table((HashtableBucket*)buffer, symbolTableLen,
duke@435:                             number_of_entries);
duke@435:   buffer += symbolTableLen;
duke@435: 
duke@435:   // Create the string table using the bucket array at this spot in the
duke@435:   // misc data space.  Since the string table is often modified, this
duke@435:   // region (of mapped pages) will be copy-on-write.
duke@435: 
duke@435:   int stringTableLen = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   number_of_entries = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   StringTable::create_table((HashtableBucket*)buffer, stringTableLen,
duke@435:                             number_of_entries);
duke@435:   buffer += stringTableLen;
duke@435: 
duke@435:   // Create the shared dictionary using the bucket array at this spot in
duke@435:   // the misc data space.  Since the shared dictionary table is never
duke@435:   // modified, this region (of mapped pages) will be (effectively, if
duke@435:   // not explicitly) read-only.
duke@435: 
duke@435:   int sharedDictionaryLen = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   number_of_entries = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   SystemDictionary::set_shared_dictionary((HashtableBucket*)buffer,
duke@435:                                           sharedDictionaryLen,
duke@435:                                           number_of_entries);
duke@435:   buffer += sharedDictionaryLen;
duke@435: 
duke@435:   // Create the package info table using the bucket array at this spot in
duke@435:   // the misc data space.  Since the package info table is never
duke@435:   // modified, this region (of mapped pages) will be (effectively, if
duke@435:   // not explicitly) read-only.
duke@435: 
duke@435:   int pkgInfoLen = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   number_of_entries = *(intptr_t*)buffer;
duke@435:   buffer += sizeof(intptr_t);
duke@435:   ClassLoader::create_package_info_table((HashtableBucket*)buffer, pkgInfoLen,
duke@435:                                          number_of_entries);
duke@435:   buffer += pkgInfoLen;
duke@435:   ClassLoader::verify();
duke@435: 
duke@435:   // The following data in the shared misc data region are the linked
duke@435:   // list elements (HashtableEntry objects) for the symbol table, string
duke@435:   // table, and shared dictionary.  The heap objects refered to by the
duke@435:   // symbol table, string table, and shared dictionary are permanent and
duke@435:   // unmovable.  Since new entries added to the string and symbol tables
duke@435:   // are always added at the beginning of the linked lists, THESE LINKED
duke@435:   // LIST ELEMENTS ARE READ-ONLY.
duke@435: 
duke@435:   int len = *(intptr_t*)buffer; // skip over symbol table entries
duke@435:   buffer += sizeof(intptr_t);
duke@435:   buffer += len;
duke@435: 
duke@435:   len = *(intptr_t*)buffer;     // skip over string table entries
duke@435:   buffer += sizeof(intptr_t);
duke@435:   buffer += len;
duke@435: 
duke@435:   len = *(intptr_t*)buffer;     // skip over shared dictionary entries
duke@435:   buffer += sizeof(intptr_t);
duke@435:   buffer += len;
duke@435: 
duke@435:   len = *(intptr_t*)buffer;     // skip over package info table entries
duke@435:   buffer += sizeof(intptr_t);
duke@435:   buffer += len;
duke@435: 
duke@435:   len = *(intptr_t*)buffer;     // skip over package info table char[] arrays.
duke@435:   buffer += sizeof(intptr_t);
duke@435:   buffer += len;
duke@435: 
duke@435:   oop* oop_array = (oop*)buffer;
duke@435:   ReadClosure rc(&oop_array);
duke@435:   serialize_oops(&rc);
duke@435: }