--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/memory/restore.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,196 @@
+/*
+ * Copyright 2003-2006 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/_restore.cpp.incl"
+
+
+// Closure for serializing initialization data in from a data area
+// (oop_array) read from the shared file.
+
+class ReadClosure : public SerializeOopClosure {
+private:
+ oop** _oop_array;
+
+ inline oop nextOop() {
+ return *(*_oop_array)++;
+ }
+
+public:
+ ReadClosure(oop** oop_array) { _oop_array = oop_array; }
+
+ void do_oop(oop* p) {
+ assert(SharedSkipVerify || *p == NULL || *p == Universe::klassKlassObj(),
+ "initializing previously initialized oop.");
+ oop obj = nextOop();
+ assert(SharedSkipVerify || (intptr_t)obj >= 0 || (intptr_t)obj < -100,
+ "hit tag while initializing oops.");
+ assert(SharedSkipVerify || obj->is_oop_or_null(), "invalid oop");
+ *p = obj;
+ }
+
+ void do_ptr(void** p) {
+ assert(*p == NULL, "initializing previous initialized pointer.");
+ void* obj = nextOop();
+ assert((intptr_t)obj >= 0 || (intptr_t)obj < -100,
+ "hit tag while initializing ptrs.");
+ *p = obj;
+ }
+
+ void do_ptr(HeapWord** p) { do_ptr((void **) p); }
+
+ void do_int(int* p) {
+ *p = (int)(intptr_t)nextOop();
+ }
+
+ void do_size_t(size_t* p) {
+ // Assumes that size_t and pointers are the same size.
+ *p = (size_t)nextOop();
+ }
+
+ void do_tag(int tag) {
+ int old_tag;
+ do_int(&old_tag);
+ FileMapInfo::assert_mark(tag == old_tag);
+ }
+
+ void do_region(u_char* start, size_t size) {
+ assert((intptr_t)start % sizeof(oop) == 0, "bad alignment");
+ assert(size % sizeof(oop) == 0, "bad size");
+ do_tag((int)size);
+ while (size > 0) {
+ *(oop*)start = nextOop();
+ start += sizeof(oop);
+ size -= sizeof(oop);
+ }
+ }
+
+ bool reading() const { return true; }
+};
+
+
+// Read the oop and miscellaneous data from the shared file, and
+// serialize it out to its various destinations.
+
+void CompactingPermGenGen::initialize_oops() {
+ FileMapInfo *mapinfo = FileMapInfo::current_info();
+
+ char* buffer = mapinfo->region_base(md);
+
+ // Skip over (reserve space for) a list of addresses of C++ vtables
+ // for Klass objects. They get filled in later.
+
+ // Skip over (reserve space for) dummy C++ vtables Klass objects.
+ // They are used as is.
+
+ void** vtbl_list = (void**)buffer;
+ buffer += vtbl_list_size * sizeof(void*);
+ intptr_t vtable_size = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ buffer += vtable_size;
+
+ // Create the symbol table using the bucket array at this spot in the
+ // misc data space. Since the symbol table is often modified, this
+ // region (of mapped pages) will be copy-on-write.
+
+ int symbolTableLen = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ int number_of_entries = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ SymbolTable::create_table((HashtableBucket*)buffer, symbolTableLen,
+ number_of_entries);
+ buffer += symbolTableLen;
+
+ // Create the string table using the bucket array at this spot in the
+ // misc data space. Since the string table is often modified, this
+ // region (of mapped pages) will be copy-on-write.
+
+ int stringTableLen = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ number_of_entries = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ StringTable::create_table((HashtableBucket*)buffer, stringTableLen,
+ number_of_entries);
+ buffer += stringTableLen;
+
+ // Create the shared dictionary using the bucket array at this spot in
+ // the misc data space. Since the shared dictionary table is never
+ // modified, this region (of mapped pages) will be (effectively, if
+ // not explicitly) read-only.
+
+ int sharedDictionaryLen = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ number_of_entries = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ SystemDictionary::set_shared_dictionary((HashtableBucket*)buffer,
+ sharedDictionaryLen,
+ number_of_entries);
+ buffer += sharedDictionaryLen;
+
+ // Create the package info table using the bucket array at this spot in
+ // the misc data space. Since the package info table is never
+ // modified, this region (of mapped pages) will be (effectively, if
+ // not explicitly) read-only.
+
+ int pkgInfoLen = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ number_of_entries = *(intptr_t*)buffer;
+ buffer += sizeof(intptr_t);
+ ClassLoader::create_package_info_table((HashtableBucket*)buffer, pkgInfoLen,
+ number_of_entries);
+ buffer += pkgInfoLen;
+ ClassLoader::verify();
+
+ // The following data in the shared misc data region are the linked
+ // list elements (HashtableEntry objects) for the symbol table, string
+ // table, and shared dictionary. The heap objects refered to by the
+ // symbol table, string table, and shared dictionary are permanent and
+ // unmovable. Since new entries added to the string and symbol tables
+ // are always added at the beginning of the linked lists, THESE LINKED
+ // LIST ELEMENTS ARE READ-ONLY.
+
+ int len = *(intptr_t*)buffer; // skip over symbol table entries
+ buffer += sizeof(intptr_t);
+ buffer += len;
+
+ len = *(intptr_t*)buffer; // skip over string table entries
+ buffer += sizeof(intptr_t);
+ buffer += len;
+
+ len = *(intptr_t*)buffer; // skip over shared dictionary entries
+ buffer += sizeof(intptr_t);
+ buffer += len;
+
+ len = *(intptr_t*)buffer; // skip over package info table entries
+ buffer += sizeof(intptr_t);
+ buffer += len;
+
+ len = *(intptr_t*)buffer; // skip over package info table char[] arrays.
+ buffer += sizeof(intptr_t);
+ buffer += len;
+
+ oop* oop_array = (oop*)buffer;
+ ReadClosure rc(&oop_array);
+ serialize_oops(&rc);
+}