hotspot/src/share/vm/classfile/symbolTable.cpp
author gziemski
Wed, 07 May 2014 14:16:45 -0500
changeset 24426 0a69c8cdfca9
parent 23858 dae377f5a7c7
child 24429 4efc66ee325c
permissions -rw-r--r--
8038654: Separate SymbolTable and StringTable code Summary: Refactor stringTable class out of symbolTable, making sure all includes are minimal set and are sorted. Reviewed-by: coleenp, stefank
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/*
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 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/altHashing.hpp"
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#include "classfile/javaClasses.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "gc_interface/collectedHeap.inline.hpp"
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#include "memory/allocation.inline.hpp"
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#include "memory/filemap.hpp"
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#include "memory/gcLocker.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/oop.inline2.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "utilities/hashtable.inline.hpp"
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// the number of buckets a thread claims
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const int ClaimChunkSize = 32;
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SymbolTable* SymbolTable::_the_table = NULL;
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// Static arena for symbols that are not deallocated
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Arena* SymbolTable::_arena = NULL;
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bool SymbolTable::_needs_rehashing = false;
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Symbol* SymbolTable::allocate_symbol(const u1* name, int len, bool c_heap, TRAPS) {
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  assert (len <= Symbol::max_length(), "should be checked by caller");
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  Symbol* sym;
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  if (DumpSharedSpaces) {
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    // Allocate all symbols to CLD shared metaspace
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    sym = new (len, ClassLoaderData::the_null_class_loader_data(), THREAD) Symbol(name, len, -1);
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  } else if (c_heap) {
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    // refcount starts as 1
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    sym = new (len, THREAD) Symbol(name, len, 1);
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    assert(sym != NULL, "new should call vm_exit_out_of_memory if C_HEAP is exhausted");
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  } else {
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    // Allocate to global arena
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    sym = new (len, arena(), THREAD) Symbol(name, len, -1);
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  }
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  return sym;
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}
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void SymbolTable::initialize_symbols(int arena_alloc_size) {
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  // Initialize the arena for global symbols, size passed in depends on CDS.
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  if (arena_alloc_size == 0) {
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    _arena = new (mtSymbol) Arena();
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  } else {
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    _arena = new (mtSymbol) Arena(arena_alloc_size);
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  }
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}
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// Call function for all symbols in the symbol table.
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void SymbolTable::symbols_do(SymbolClosure *cl) {
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  const int n = the_table()->table_size();
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  for (int i = 0; i < n; i++) {
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    for (HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i);
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         p != NULL;
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         p = p->next()) {
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      cl->do_symbol(p->literal_addr());
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    }
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  }
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}
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int SymbolTable::_symbols_removed = 0;
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int SymbolTable::_symbols_counted = 0;
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volatile int SymbolTable::_parallel_claimed_idx = 0;
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void SymbolTable::buckets_unlink(int start_idx, int end_idx, int* processed, int* removed, size_t* memory_total) {
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  for (int i = start_idx; i < end_idx; ++i) {
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    HashtableEntry<Symbol*, mtSymbol>** p = the_table()->bucket_addr(i);
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    HashtableEntry<Symbol*, mtSymbol>* entry = the_table()->bucket(i);
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    while (entry != NULL) {
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      // Shared entries are normally at the end of the bucket and if we run into
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      // a shared entry, then there is nothing more to remove. However, if we
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      // have rehashed the table, then the shared entries are no longer at the
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      // end of the bucket.
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      if (entry->is_shared() && !use_alternate_hashcode()) {
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        break;
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      }
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      Symbol* s = entry->literal();
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      (*memory_total) += s->size();
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      (*processed)++;
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      assert(s != NULL, "just checking");
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      // If reference count is zero, remove.
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      if (s->refcount() == 0) {
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        assert(!entry->is_shared(), "shared entries should be kept live");
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        delete s;
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        (*removed)++;
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        *p = entry->next();
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        the_table()->free_entry(entry);
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      } else {
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        p = entry->next_addr();
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      }
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      // get next entry
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      entry = (HashtableEntry<Symbol*, mtSymbol>*)HashtableEntry<Symbol*, mtSymbol>::make_ptr(*p);
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    }
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  }
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}
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// Remove unreferenced symbols from the symbol table
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// This is done late during GC.
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void SymbolTable::unlink(int* processed, int* removed) {
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  size_t memory_total = 0;
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  buckets_unlink(0, the_table()->table_size(), processed, removed, &memory_total);
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  _symbols_removed += *removed;
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  _symbols_counted += *processed;
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  // Exclude printing for normal PrintGCDetails because people parse
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  // this output.
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  if (PrintGCDetails && Verbose && WizardMode) {
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    gclog_or_tty->print(" [Symbols=%d size=" SIZE_FORMAT "K] ", *processed,
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                        (memory_total*HeapWordSize)/1024);
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  }
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}
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void SymbolTable::possibly_parallel_unlink(int* processed, int* removed) {
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  const int limit = the_table()->table_size();
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  size_t memory_total = 0;
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  for (;;) {
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    // Grab next set of buckets to scan
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    int start_idx = Atomic::add(ClaimChunkSize, &_parallel_claimed_idx) - ClaimChunkSize;
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    if (start_idx >= limit) {
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      // End of table
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      break;
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    }
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    int end_idx = MIN2(limit, start_idx + ClaimChunkSize);
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    buckets_unlink(start_idx, end_idx, processed, removed, &memory_total);
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  }
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  Atomic::add(*processed, &_symbols_counted);
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  Atomic::add(*removed, &_symbols_removed);
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  // Exclude printing for normal PrintGCDetails because people parse
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  // this output.
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  if (PrintGCDetails && Verbose && WizardMode) {
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    gclog_or_tty->print(" [Symbols: scanned=%d removed=%d size=" SIZE_FORMAT "K] ", *processed, *removed,
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                        (memory_total*HeapWordSize)/1024);
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  }
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}
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// Create a new table and using alternate hash code, populate the new table
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// with the existing strings.   Set flag to use the alternate hash code afterwards.
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void SymbolTable::rehash_table() {
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  assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
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  // This should never happen with -Xshare:dump but it might in testing mode.
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  if (DumpSharedSpaces) return;
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  // Create a new symbol table
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  SymbolTable* new_table = new SymbolTable();
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  the_table()->move_to(new_table);
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  // Delete the table and buckets (entries are reused in new table).
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  delete _the_table;
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  // Don't check if we need rehashing until the table gets unbalanced again.
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  // Then rehash with a new global seed.
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  _needs_rehashing = false;
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  _the_table = new_table;
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}
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// Lookup a symbol in a bucket.
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Symbol* SymbolTable::lookup(int index, const char* name,
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                              int len, unsigned int hash) {
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  int count = 0;
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  for (HashtableEntry<Symbol*, mtSymbol>* e = bucket(index); e != NULL; e = e->next()) {
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    count++;  // count all entries in this bucket, not just ones with same hash
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    if (e->hash() == hash) {
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      Symbol* sym = e->literal();
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      if (sym->equals(name, len)) {
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        // something is referencing this symbol now.
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        sym->increment_refcount();
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        return sym;
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      }
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    }
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  }
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  // If the bucket size is too deep check if this hash code is insufficient.
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  if (count >= BasicHashtable<mtSymbol>::rehash_count && !needs_rehashing()) {
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    _needs_rehashing = check_rehash_table(count);
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  }
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  return NULL;
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}
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// Pick hashing algorithm.
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unsigned int SymbolTable::hash_symbol(const char* s, int len) {
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  return use_alternate_hashcode() ?
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           AltHashing::murmur3_32(seed(), (const jbyte*)s, len) :
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           java_lang_String::hash_code(s, len);
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}
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// We take care not to be blocking while holding the
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// SymbolTable_lock. Otherwise, the system might deadlock, since the
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// symboltable is used during compilation (VM_thread) The lock free
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// synchronization is simplified by the fact that we do not delete
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// entries in the symbol table during normal execution (only during
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// safepoints).
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Symbol* SymbolTable::lookup(const char* name, int len, TRAPS) {
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  unsigned int hashValue = hash_symbol(name, len);
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  int index = the_table()->hash_to_index(hashValue);
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  Symbol* s = the_table()->lookup(index, name, len, hashValue);
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  // Found
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  if (s != NULL) return s;
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  // Grab SymbolTable_lock first.
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  MutexLocker ml(SymbolTable_lock, THREAD);
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  // Otherwise, add to symbol to table
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  return the_table()->basic_add(index, (u1*)name, len, hashValue, true, CHECK_NULL);
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}
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Symbol* SymbolTable::lookup(const Symbol* sym, int begin, int end, TRAPS) {
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  char* buffer;
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  int index, len;
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  unsigned int hashValue;
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  char* name;
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  {
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    debug_only(No_Safepoint_Verifier nsv;)
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    name = (char*)sym->base() + begin;
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    len = end - begin;
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    hashValue = hash_symbol(name, len);
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    index = the_table()->hash_to_index(hashValue);
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    Symbol* s = the_table()->lookup(index, name, len, hashValue);
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    // Found
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    if (s != NULL) return s;
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  }
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  // Otherwise, add to symbol to table. Copy to a C string first.
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  char stack_buf[128];
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  ResourceMark rm(THREAD);
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  if (len <= 128) {
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    buffer = stack_buf;
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  } else {
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    buffer = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len);
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  }
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  for (int i=0; i<len; i++) {
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    buffer[i] = name[i];
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  }
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  // Make sure there is no safepoint in the code above since name can't move.
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  // We can't include the code in No_Safepoint_Verifier because of the
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  // ResourceMark.
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  // Grab SymbolTable_lock first.
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  MutexLocker ml(SymbolTable_lock, THREAD);
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  return the_table()->basic_add(index, (u1*)buffer, len, hashValue, true, CHECK_NULL);
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}
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Symbol* SymbolTable::lookup_only(const char* name, int len,
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                                   unsigned int& hash) {
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  hash = hash_symbol(name, len);
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  int index = the_table()->hash_to_index(hash);
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  Symbol* s = the_table()->lookup(index, name, len, hash);
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  return s;
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}
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// Look up the address of the literal in the SymbolTable for this Symbol*
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// Do not create any new symbols
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// Do not increment the reference count to keep this alive
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Symbol** SymbolTable::lookup_symbol_addr(Symbol* sym){
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  unsigned int hash = hash_symbol((char*)sym->bytes(), sym->utf8_length());
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  int index = the_table()->hash_to_index(hash);
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  for (HashtableEntry<Symbol*, mtSymbol>* e = the_table()->bucket(index); e != NULL; e = e->next()) {
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    if (e->hash() == hash) {
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      Symbol* literal_sym = e->literal();
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      if (sym == literal_sym) {
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        return e->literal_addr();
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      }
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    }
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  }
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  return NULL;
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}
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// Suggestion: Push unicode-based lookup all the way into the hashing
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// and probing logic, so there is no need for convert_to_utf8 until
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// an actual new Symbol* is created.
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diff changeset
   306
Symbol* SymbolTable::lookup_unicode(const jchar* name, int utf16_length, TRAPS) {
2332
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diff changeset
   307
  int utf8_length = UNICODE::utf8_length((jchar*) name, utf16_length);
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diff changeset
   308
  char stack_buf[128];
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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diff changeset
   309
  if (utf8_length < (int) sizeof(stack_buf)) {
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diff changeset
   310
    char* chars = stack_buf;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   311
    UNICODE::convert_to_utf8(name, utf16_length, chars);
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diff changeset
   312
    return lookup(chars, utf8_length, THREAD);
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parents: 2131
diff changeset
   313
  } else {
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parents: 2131
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   314
    ResourceMark rm(THREAD);
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parents: 2131
diff changeset
   315
    char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   316
    UNICODE::convert_to_utf8(name, utf16_length, chars);
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parents: 2131
diff changeset
   317
    return lookup(chars, utf8_length, THREAD);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   318
  }
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   319
}
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   320
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coleenp
parents: 7397
diff changeset
   321
Symbol* SymbolTable::lookup_only_unicode(const jchar* name, int utf16_length,
2332
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jrose
parents: 2131
diff changeset
   322
                                           unsigned int& hash) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   323
  int utf8_length = UNICODE::utf8_length((jchar*) name, utf16_length);
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parents: 2131
diff changeset
   324
  char stack_buf[128];
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   325
  if (utf8_length < (int) sizeof(stack_buf)) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
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parents: 2131
diff changeset
   326
    char* chars = stack_buf;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   327
    UNICODE::convert_to_utf8(name, utf16_length, chars);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   328
    return lookup_only(chars, utf8_length, hash);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   329
  } else {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   330
    ResourceMark rm;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   331
    char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   332
    UNICODE::convert_to_utf8(name, utf16_length, chars);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   333
    return lookup_only(chars, utf8_length, hash);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   334
  }
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   335
}
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
   336
13728
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coleenp
parents: 13199
diff changeset
   337
void SymbolTable::add(ClassLoaderData* loader_data, constantPoolHandle cp,
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   338
                      int names_count,
1
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diff changeset
   339
                      const char** names, int* lengths, int* cp_indices,
489c9b5090e2 Initial load
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parents:
diff changeset
   340
                      unsigned int* hashValues, TRAPS) {
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   341
  // Grab SymbolTable_lock first.
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   342
  MutexLocker ml(SymbolTable_lock, THREAD);
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   343
1
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   344
  SymbolTable* table = the_table();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13199
diff changeset
   345
  bool added = table->basic_add(loader_data, cp, names_count, names, lengths,
1
489c9b5090e2 Initial load
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parents:
diff changeset
   346
                                cp_indices, hashValues, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   347
  if (!added) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   348
    // do it the hard way
489c9b5090e2 Initial load
duke
parents:
diff changeset
   349
    for (int i=0; i<names_count; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   350
      int index = table->hash_to_index(hashValues[i]);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13199
diff changeset
   351
      bool c_heap = !loader_data->is_the_null_class_loader_data();
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   352
      Symbol* sym = table->basic_add(index, (u1*)names[i], lengths[i], hashValues[i], c_heap, CHECK);
1
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parents:
diff changeset
   353
      cp->symbol_at_put(cp_indices[i], sym);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   354
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   355
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   356
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   357
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   358
Symbol* SymbolTable::new_permanent_symbol(const char* name, TRAPS) {
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   359
  unsigned int hash;
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   360
  Symbol* result = SymbolTable::lookup_only((char*)name, (int)strlen(name), hash);
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   361
  if (result != NULL) {
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   362
    return result;
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   363
  }
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   364
  // Grab SymbolTable_lock first.
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   365
  MutexLocker ml(SymbolTable_lock, THREAD);
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   366
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   367
  SymbolTable* table = the_table();
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   368
  int index = table->hash_to_index(hash);
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   369
  return table->basic_add(index, (u1*)name, (int)strlen(name), hash, false, THREAD);
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   370
}
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   371
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   372
Symbol* SymbolTable::basic_add(int index_arg, u1 *name, int len,
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   373
                               unsigned int hashValue_arg, bool c_heap, TRAPS) {
20079
edbc2f7b38ef 8024974: Incorrect use of GC_locker::is_active()
stefank
parents: 18091
diff changeset
   374
  assert(!Universe::heap()->is_in_reserved(name),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   375
         "proposed name of symbol must be stable");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   376
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   377
  // Don't allow symbols to be created which cannot fit in a Symbol*.
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   378
  if (len > Symbol::max_length()) {
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   379
    THROW_MSG_0(vmSymbols::java_lang_InternalError(),
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   380
                "name is too long to represent");
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   381
  }
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   382
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   383
  // Cannot hit a safepoint in this function because the "this" pointer can move.
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   384
  No_Safepoint_Verifier nsv;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   386
  // Check if the symbol table has been rehashed, if so, need to recalculate
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   387
  // the hash value and index.
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   388
  unsigned int hashValue;
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   389
  int index;
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   390
  if (use_alternate_hashcode()) {
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   391
    hashValue = hash_symbol((const char*)name, len);
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   392
    index = hash_to_index(hashValue);
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   393
  } else {
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   394
    hashValue = hashValue_arg;
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   395
    index = index_arg;
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   396
  }
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   397
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
  // Since look-up was done lock-free, we need to check if another
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  // thread beat us in the race to insert the symbol.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   400
  Symbol* test = lookup(index, (char*)name, len, hashValue);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  if (test != NULL) {
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   402
    // A race occurred and another thread introduced the symbol.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   403
    assert(test->refcount() != 0, "lookup should have incremented the count");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
    return test;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   407
  // Create a new symbol.
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   408
  Symbol* sym = allocate_symbol(name, len, c_heap, CHECK_NULL);
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   409
  assert(sym->equals((char*)name, len), "symbol must be properly initialized");
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   410
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   411
  HashtableEntry<Symbol*, mtSymbol>* entry = new_entry(hashValue, sym);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
  add_entry(index, entry);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   413
  return sym;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   416
// This version of basic_add adds symbols in batch from the constant pool
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   417
// parsing.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13199
diff changeset
   418
bool SymbolTable::basic_add(ClassLoaderData* loader_data, constantPoolHandle cp,
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   419
                            int names_count,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
                            const char** names, int* lengths,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
                            int* cp_indices, unsigned int* hashValues,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
                            TRAPS) {
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   423
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   424
  // Check symbol names are not too long.  If any are too long, don't add any.
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   425
  for (int i = 0; i< names_count; i++) {
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   426
    if (lengths[i] > Symbol::max_length()) {
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   427
      THROW_MSG_0(vmSymbols::java_lang_InternalError(),
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   428
                  "name is too long to represent");
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   429
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   432
  // Cannot hit a safepoint in this function because the "this" pointer can move.
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   433
  No_Safepoint_Verifier nsv;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   435
  for (int i=0; i<names_count; i++) {
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   436
    // Check if the symbol table has been rehashed, if so, need to recalculate
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   437
    // the hash value.
13097
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   438
    unsigned int hashValue;
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   439
    if (use_alternate_hashcode()) {
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   440
      hashValue = hash_symbol(names[i], lengths[i]);
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   441
    } else {
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   442
      hashValue = hashValues[i];
c146b608d91f 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
parents: 13087
diff changeset
   443
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
    // Since look-up was done lock-free, we need to check if another
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
    // thread beat us in the race to insert the symbol.
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   446
    int index = hash_to_index(hashValue);
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   447
    Symbol* test = lookup(index, names[i], lengths[i], hashValue);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
    if (test != NULL) {
2131
98f9cef66a34 6810672: Comment typos
twisti
parents: 1
diff changeset
   449
      // A race occurred and another thread introduced the symbol, this one
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
      // will be dropped and collected. Use test instead.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
      cp->symbol_at_put(cp_indices[i], test);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   452
      assert(test->refcount() != 0, "lookup should have incremented the count");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
    } else {
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   454
      // Create a new symbol.  The null class loader is never unloaded so these
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   455
      // are allocated specially in a permanent arena.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13199
diff changeset
   456
      bool c_heap = !loader_data->is_the_null_class_loader_data();
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   457
      Symbol* sym = allocate_symbol((const u1*)names[i], lengths[i], c_heap, CHECK_(false));
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   458
      assert(sym->equals(names[i], lengths[i]), "symbol must be properly initialized");  // why wouldn't it be???
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   459
      HashtableEntry<Symbol*, mtSymbol>* entry = new_entry(hashValue, sym);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
      add_entry(index, entry);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
      cp->symbol_at_put(cp_indices[i], sym);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
void SymbolTable::verify() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
  for (int i = 0; i < the_table()->table_size(); ++i) {
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   470
    HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
    for ( ; p != NULL; p = p->next()) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   472
      Symbol* s = (Symbol*)(p->literal());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
      guarantee(s != NULL, "symbol is NULL");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
      unsigned int h = hash_symbol((char*)s->bytes(), s->utf8_length());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
      guarantee(p->hash() == h, "broken hash in symbol table entry");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
      guarantee(the_table()->hash_to_index(h) == i,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
                "wrong index in symbol table");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   482
void SymbolTable::dump(outputStream* st) {
17610
c6857feaac47 8014262: PrintStringTableStatistics should include more footprint info
iklam
parents: 17081
diff changeset
   483
  the_table()->dump_table(st, "SymbolTable");
13087
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   484
}
673ea6efaf18 7158800: Improve storage of symbol tables
coleenp
parents: 12263
diff changeset
   485
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
//---------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
// Non-product code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
void SymbolTable::print_histogram() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
  MutexLocker ml(SymbolTable_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
  const int results_length = 100;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
  int results[results_length];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
  int i,j;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
  // initialize results to zero
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
  for (j = 0; j < results_length; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
    results[j] = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
  int total = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
  int max_symbols = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  int out_of_range = 0;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   506
  int memory_total = 0;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   507
  int count = 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  for (i = 0; i < the_table()->table_size(); i++) {
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   509
    HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
    for ( ; p != NULL; p = p->next()) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13199
diff changeset
   511
      memory_total += p->literal()->size();
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   512
      count++;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   513
      int counter = p->literal()->utf8_length();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
      total += counter;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
      if (counter < results_length) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
        results[counter]++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
        out_of_range++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
      max_symbols = MAX2(max_symbols, counter);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
  tty->print_cr("Symbol Table:");
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   524
  tty->print_cr("Total number of symbols  %5d", count);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   525
  tty->print_cr("Total size in memory     %5dK",
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   526
          (memory_total*HeapWordSize)/1024);
22545
b93a7f0e9b9d 8027476: Improve performance of Stringtable unlink
tschatzl
parents: 20283
diff changeset
   527
  tty->print_cr("Total counted            %5d", _symbols_counted);
b93a7f0e9b9d 8027476: Improve performance of Stringtable unlink
tschatzl
parents: 20283
diff changeset
   528
  tty->print_cr("Total removed            %5d", _symbols_removed);
b93a7f0e9b9d 8027476: Improve performance of Stringtable unlink
tschatzl
parents: 20283
diff changeset
   529
  if (_symbols_counted > 0) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   530
    tty->print_cr("Percent removed          %3.2f",
22545
b93a7f0e9b9d 8027476: Improve performance of Stringtable unlink
tschatzl
parents: 20283
diff changeset
   531
          ((float)_symbols_removed/(float)_symbols_counted)* 100);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   532
  }
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   533
  tty->print_cr("Reference counts         %5d", Symbol::_total_count);
12263
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   534
  tty->print_cr("Symbol arena size        %5d used %5d",
d20640f4f8fe 7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
parents: 11480
diff changeset
   535
                 arena()->size_in_bytes(), arena()->used());
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   536
  tty->print_cr("Histogram of symbol length:");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  tty->print_cr("%8s %5d", "Total  ", total);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
  tty->print_cr("%8s %5d", "Maximum", max_symbols);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
  tty->print_cr("%8s %3.2f", "Average",
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
          ((float) total / (float) the_table()->table_size()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  tty->print_cr("%s", "Histogram:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  tty->print_cr(" %s %29s", "Length", "Number chains that length");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  for (i = 0; i < results_length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
    if (results[i] > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
      tty->print_cr("%6d %10d", i, results[i]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
  }
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   548
  if (Verbose) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   549
    int line_length = 70;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   550
    tty->print_cr("%s %30s", " Length", "Number chains that length");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   551
    for (i = 0; i < results_length; i++) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   552
      if (results[i] > 0) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   553
        tty->print("%4d", i);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   554
        for (j = 0; (j < results[i]) && (j < line_length);  j++) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   555
          tty->print("%1s", "*");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   556
        }
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   557
        if (j == line_length) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   558
          tty->print("%1s", "+");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   559
        }
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   560
        tty->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
      }
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   562
    }
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   563
  }
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   564
  tty->print_cr(" %s %d: %d\n", "Number chains longer than",
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   565
                    results_length, out_of_range);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   566
}
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   567
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   568
void SymbolTable::print() {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   569
  for (int i = 0; i < the_table()->table_size(); ++i) {
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   570
    HashtableEntry<Symbol*, mtSymbol>** p = the_table()->bucket_addr(i);
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   571
    HashtableEntry<Symbol*, mtSymbol>* entry = the_table()->bucket(i);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   572
    if (entry != NULL) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   573
      while (entry != NULL) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   574
        tty->print(PTR_FORMAT " ", entry->literal());
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   575
        entry->literal()->print();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   576
        tty->print(" %d", entry->literal()->refcount());
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   577
        p = entry->next_addr();
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 13097
diff changeset
   578
        entry = (HashtableEntry<Symbol*, mtSymbol>*)HashtableEntry<Symbol*, mtSymbol>::make_ptr(*p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
      tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
#endif // PRODUCT