Initial load

hotspot/src/share/vm/classfile/resolutionErrors.cpp

@@ -0,0 +1,119 @@
+/*
+ * Copyright 2005 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/_resolutionErrors.cpp.incl"
+
+// add new entry to the table
+void ResolutionErrorTable::add_entry(int index, unsigned int hash,
+                                     constantPoolHandle pool, int cp_index, symbolHandle error)
+{
+  assert_locked_or_safepoint(SystemDictionary_lock);
+  assert(!pool.is_null() && !error.is_null(), "adding NULL obj");
+
+  ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error());
+  add_entry(index, entry);
+}
+
+// find entry in the table
+ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash,
+                                                       constantPoolHandle pool, int cp_index)
+{
+  assert_locked_or_safepoint(SystemDictionary_lock);
+
+  for (ResolutionErrorEntry *error_probe = bucket(index);
+                         error_probe != NULL;
+                         error_probe = error_probe->next()) {
+  if (error_probe->hash() == hash && error_probe->pool() == pool()) {
+      return error_probe;;
+    }
+  }
+  return NULL;
+}
+
+// create new error entry
+ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, constantPoolOop pool,
+                                                      int cp_index, symbolOop error)
+{
+  ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable::new_entry(hash, pool);
+  entry->set_cp_index(cp_index);
+  entry->set_error(error);
+
+  return entry;
+}
+
+// create resolution error table
+ResolutionErrorTable::ResolutionErrorTable(int table_size)
+    : Hashtable(table_size, sizeof(ResolutionErrorEntry)) {
+}
+
+// GC support
+void ResolutionErrorTable::oops_do(OopClosure* f) {
+  for (int i = 0; i < table_size(); i++) {
+    for (ResolutionErrorEntry* probe = bucket(i);
+                           probe != NULL;
+                           probe = probe->next()) {
+      assert(probe->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");
+      assert(probe->error() != (symbolOop)NULL, "resolution error table is corrupt");
+      probe->oops_do(f);
+    }
+  }
+}
+
+// GC support
+void ResolutionErrorEntry::oops_do(OopClosure* blk) {
+  blk->do_oop((oop*)pool_addr());
+  blk->do_oop((oop*)error_addr());
+}
+
+// We must keep the symbolOop used in the error alive. The constantPoolOop will
+// decide when the entry can be purged.
+void ResolutionErrorTable::always_strong_classes_do(OopClosure* blk) {
+  for (int i = 0; i < table_size(); i++) {
+    for (ResolutionErrorEntry* probe = bucket(i);
+                           probe != NULL;
+                           probe = probe->next()) {
+      assert(probe->error() != (symbolOop)NULL, "resolution error table is corrupt");
+      blk->do_oop((oop*)probe->error_addr());
+    }
+  }
+}
+
+// Remove unloaded entries from the table
+void ResolutionErrorTable::purge_resolution_errors(BoolObjectClosure* is_alive) {
+  assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint")
+  for (int i = 0; i < table_size(); i++) {
+    for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) {
+      ResolutionErrorEntry* entry = *p;
+      assert(entry->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");
+      constantPoolOop pool = entry->pool();
+      if (is_alive->do_object_b(pool)) {
+        p = entry->next_addr();
+      } else {
+        *p = entry->next();
+        free_entry(entry);
+      }
+    }
+  }
+}