author | stefank |
Fri, 04 May 2018 11:41:35 +0200 | |
changeset 49982 | 9042ffe5b7fe |
parent 49594 | 898ef81cbc0e |
child 51179 | 516acf6956a2 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1997, 2017, 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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||
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#include "precompiled.hpp" |
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#include "classfile/altHashing.hpp" |
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#include "classfile/compactHashtable.inline.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/shared/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/metaspaceClosure.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/atomic.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/safepointVerifiers.hpp" |
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#include "services/diagnosticCommand.hpp" |
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#include "utilities/hashtable.inline.hpp" |
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// -------------------------------------------------------------------------- |
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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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bool SymbolTable::_lookup_shared_first = false; |
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CompactHashtable<Symbol*, char> SymbolTable::_shared_table; |
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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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c_heap = false; |
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} |
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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, PERM_REFCOUNT); |
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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(mtSymbol); |
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} else { |
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_arena = new (mtSymbol) Arena(mtSymbol, 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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// all symbols from shared table |
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_shared_table.symbols_do(cl); |
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// all symbols from the dynamic table |
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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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void SymbolTable::metaspace_pointers_do(MetaspaceClosure* it) { |
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assert(DumpSharedSpaces, "called only during dump time"); |
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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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it->push(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, BucketUnlinkContext* context) { |
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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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context->_num_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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*p = entry->next(); |
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context->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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BucketUnlinkContext context; |
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buckets_unlink(0, the_table()->table_size(), &context); |
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150 |
_the_table->bulk_free_entries(&context); |
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*processed = context._num_processed; |
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*removed = context._num_removed; |
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153 |
|
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154 |
_symbols_removed = context._num_removed; |
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_symbols_counted = context._num_processed; |
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156 |
} |
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157 |
|
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158 |
void SymbolTable::possibly_parallel_unlink(int* processed, int* removed) { |
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const int limit = the_table()->table_size(); |
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160 |
|
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161 |
BucketUnlinkContext context; |
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162 |
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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165 |
if (start_idx >= limit) { |
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166 |
// End of table |
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167 |
break; |
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168 |
} |
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169 |
|
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int end_idx = MIN2(limit, start_idx + ClaimChunkSize); |
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171 |
buckets_unlink(start_idx, end_idx, &context); |
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} |
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173 |
|
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174 |
_the_table->bulk_free_entries(&context); |
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*processed = context._num_processed; |
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176 |
*removed = context._num_removed; |
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177 |
|
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178 |
Atomic::add(context._num_processed, &_symbols_counted); |
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179 |
Atomic::add(context._num_removed, &_symbols_removed); |
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} |
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181 |
|
13087 | 182 |
// Create a new table and using alternate hash code, populate the new table |
183 |
// with the existing strings. Set flag to use the alternate hash code afterwards. |
|
184 |
void SymbolTable::rehash_table() { |
|
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if (DumpSharedSpaces) { |
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tty->print_cr("Warning: rehash_table should not be called while dumping archive"); |
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return; |
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188 |
} |
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189 |
|
13087 | 190 |
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
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191 |
// This should never happen with -Xshare:dump but it might in testing mode. |
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192 |
if (DumpSharedSpaces) return; |
13087 | 193 |
// Create a new symbol table |
194 |
SymbolTable* new_table = new SymbolTable(); |
|
195 |
||
196 |
the_table()->move_to(new_table); |
|
197 |
||
198 |
// Delete the table and buckets (entries are reused in new table). |
|
199 |
delete _the_table; |
|
200 |
// Don't check if we need rehashing until the table gets unbalanced again. |
|
201 |
// Then rehash with a new global seed. |
|
202 |
_needs_rehashing = false; |
|
203 |
_the_table = new_table; |
|
204 |
} |
|
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205 |
|
1 | 206 |
// Lookup a symbol in a bucket. |
207 |
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208 |
Symbol* SymbolTable::lookup_dynamic(int index, const char* name, |
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209 |
int len, unsigned int hash) { |
13087 | 210 |
int count = 0; |
13195 | 211 |
for (HashtableEntry<Symbol*, mtSymbol>* e = bucket(index); e != NULL; e = e->next()) { |
13087 | 212 |
count++; // count all entries in this bucket, not just ones with same hash |
1 | 213 |
if (e->hash() == hash) { |
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Symbol* sym = e->literal(); |
1 | 215 |
if (sym->equals(name, len)) { |
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// something is referencing this symbol now. |
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217 |
sym->increment_refcount(); |
1 | 218 |
return sym; |
219 |
} |
|
220 |
} |
|
221 |
} |
|
13087 | 222 |
// If the bucket size is too deep check if this hash code is insufficient. |
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223 |
if (count >= rehash_count && !needs_rehashing()) { |
13087 | 224 |
_needs_rehashing = check_rehash_table(count); |
225 |
} |
|
1 | 226 |
return NULL; |
227 |
} |
|
228 |
||
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229 |
Symbol* SymbolTable::lookup_shared(const char* name, |
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int len, unsigned int hash) { |
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if (use_alternate_hashcode()) { |
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// hash_code parameter may use alternate hashing algorithm but the shared table |
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// always uses the same original hash code. |
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hash = hash_shared_symbol(name, len); |
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235 |
} |
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return _shared_table.lookup(name, hash, len); |
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237 |
} |
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238 |
|
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239 |
Symbol* SymbolTable::lookup(int index, const char* name, |
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240 |
int len, unsigned int hash) { |
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241 |
Symbol* sym; |
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242 |
if (_lookup_shared_first) { |
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243 |
sym = lookup_shared(name, len, hash); |
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244 |
if (sym != NULL) { |
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245 |
return sym; |
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246 |
} |
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247 |
_lookup_shared_first = false; |
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248 |
return lookup_dynamic(index, name, len, hash); |
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249 |
} else { |
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250 |
sym = lookup_dynamic(index, name, len, hash); |
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251 |
if (sym != NULL) { |
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|
252 |
return sym; |
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|
253 |
} |
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254 |
sym = lookup_shared(name, len, hash); |
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|
255 |
if (sym != NULL) { |
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|
256 |
_lookup_shared_first = true; |
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|
257 |
} |
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|
258 |
return sym; |
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|
259 |
} |
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|
260 |
} |
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261 |
|
39713 | 262 |
u4 SymbolTable::encode_shared(Symbol* sym) { |
263 |
assert(DumpSharedSpaces, "called only during dump time"); |
|
264 |
uintx base_address = uintx(MetaspaceShared::shared_rs()->base()); |
|
265 |
uintx offset = uintx(sym) - base_address; |
|
266 |
assert(offset < 0x7fffffff, "sanity"); |
|
267 |
return u4(offset); |
|
268 |
} |
|
269 |
||
270 |
Symbol* SymbolTable::decode_shared(u4 offset) { |
|
271 |
assert(!DumpSharedSpaces, "called only during runtime"); |
|
272 |
uintx base_address = _shared_table.base_address(); |
|
273 |
Symbol* sym = (Symbol*)(base_address + offset); |
|
274 |
||
275 |
#ifndef PRODUCT |
|
276 |
const char* s = (const char*)sym->bytes(); |
|
277 |
int len = sym->utf8_length(); |
|
278 |
unsigned int hash = hash_symbol(s, len); |
|
279 |
assert(sym == lookup_shared(s, len, hash), "must be shared symbol"); |
|
280 |
#endif |
|
281 |
||
282 |
return sym; |
|
283 |
} |
|
284 |
||
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285 |
// Pick hashing algorithm. |
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|
286 |
unsigned int SymbolTable::hash_symbol(const char* s, int len) { |
13087 | 287 |
return use_alternate_hashcode() ? |
288 |
AltHashing::murmur3_32(seed(), (const jbyte*)s, len) : |
|
33628 | 289 |
java_lang_String::hash_code((const jbyte*)s, len); |
13087 | 290 |
} |
291 |
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292 |
unsigned int SymbolTable::hash_shared_symbol(const char* s, int len) { |
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293 |
return java_lang_String::hash_code((const jbyte*)s, len); |
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294 |
} |
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295 |
|
1 | 296 |
|
297 |
// We take care not to be blocking while holding the |
|
298 |
// SymbolTable_lock. Otherwise, the system might deadlock, since the |
|
299 |
// symboltable is used during compilation (VM_thread) The lock free |
|
300 |
// synchronization is simplified by the fact that we do not delete |
|
301 |
// entries in the symbol table during normal execution (only during |
|
302 |
// safepoints). |
|
303 |
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304 |
Symbol* SymbolTable::lookup(const char* name, int len, TRAPS) { |
1 | 305 |
unsigned int hashValue = hash_symbol(name, len); |
306 |
int index = the_table()->hash_to_index(hashValue); |
|
307 |
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308 |
Symbol* s = the_table()->lookup(index, name, len, hashValue); |
1 | 309 |
|
310 |
// Found |
|
311 |
if (s != NULL) return s; |
|
312 |
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313 |
// Grab SymbolTable_lock first. |
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314 |
MutexLocker ml(SymbolTable_lock, THREAD); |
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|
315 |
|
1 | 316 |
// Otherwise, add to symbol to table |
27677 | 317 |
return the_table()->basic_add(index, (u1*)name, len, hashValue, true, THREAD); |
1 | 318 |
} |
319 |
||
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|
320 |
Symbol* SymbolTable::lookup(const Symbol* sym, int begin, int end, TRAPS) { |
1 | 321 |
char* buffer; |
322 |
int index, len; |
|
323 |
unsigned int hashValue; |
|
324 |
char* name; |
|
325 |
{ |
|
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326 |
debug_only(NoSafepointVerifier nsv;) |
1 | 327 |
|
328 |
name = (char*)sym->base() + begin; |
|
329 |
len = end - begin; |
|
330 |
hashValue = hash_symbol(name, len); |
|
331 |
index = the_table()->hash_to_index(hashValue); |
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|
332 |
Symbol* s = the_table()->lookup(index, name, len, hashValue); |
1 | 333 |
|
334 |
// Found |
|
335 |
if (s != NULL) return s; |
|
336 |
} |
|
337 |
||
338 |
// Otherwise, add to symbol to table. Copy to a C string first. |
|
339 |
char stack_buf[128]; |
|
340 |
ResourceMark rm(THREAD); |
|
341 |
if (len <= 128) { |
|
342 |
buffer = stack_buf; |
|
343 |
} else { |
|
344 |
buffer = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len); |
|
345 |
} |
|
346 |
for (int i=0; i<len; i++) { |
|
347 |
buffer[i] = name[i]; |
|
348 |
} |
|
349 |
// Make sure there is no safepoint in the code above since name can't move. |
|
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350 |
// We can't include the code in NoSafepointVerifier because of the |
1 | 351 |
// ResourceMark. |
352 |
||
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|
353 |
// Grab SymbolTable_lock first. |
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|
354 |
MutexLocker ml(SymbolTable_lock, THREAD); |
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|
355 |
|
27677 | 356 |
return the_table()->basic_add(index, (u1*)buffer, len, hashValue, true, THREAD); |
1 | 357 |
} |
358 |
||
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|
359 |
Symbol* SymbolTable::lookup_only(const char* name, int len, |
1 | 360 |
unsigned int& hash) { |
361 |
hash = hash_symbol(name, len); |
|
362 |
int index = the_table()->hash_to_index(hash); |
|
363 |
||
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|
364 |
Symbol* s = the_table()->lookup(index, name, len, hash); |
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|
365 |
return s; |
1 | 366 |
} |
367 |
||
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|
368 |
// Look up the address of the literal in the SymbolTable for this Symbol* |
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|
369 |
// Do not create any new symbols |
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|
370 |
// Do not increment the reference count to keep this alive |
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|
371 |
Symbol** SymbolTable::lookup_symbol_addr(Symbol* sym){ |
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|
372 |
unsigned int hash = hash_symbol((char*)sym->bytes(), sym->utf8_length()); |
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|
373 |
int index = the_table()->hash_to_index(hash); |
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|
374 |
|
13195 | 375 |
for (HashtableEntry<Symbol*, mtSymbol>* e = the_table()->bucket(index); e != NULL; e = e->next()) { |
11480
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|
376 |
if (e->hash() == hash) { |
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|
377 |
Symbol* literal_sym = e->literal(); |
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|
378 |
if (sym == literal_sym) { |
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|
379 |
return e->literal_addr(); |
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changeset
|
380 |
} |
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|
381 |
} |
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|
382 |
} |
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|
383 |
return NULL; |
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|
384 |
} |
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|
385 |
|
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|
386 |
// Suggestion: Push unicode-based lookup all the way into the hashing |
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|
387 |
// and probing logic, so there is no need for convert_to_utf8 until |
8076
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|
388 |
// an actual new Symbol* is created. |
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|
389 |
Symbol* SymbolTable::lookup_unicode(const jchar* name, int utf16_length, TRAPS) { |
2332
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|
390 |
int utf8_length = UNICODE::utf8_length((jchar*) name, utf16_length); |
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|
391 |
char stack_buf[128]; |
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|
392 |
if (utf8_length < (int) sizeof(stack_buf)) { |
5c7b6f4ce0a1
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|
393 |
char* chars = stack_buf; |
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|
394 |
UNICODE::convert_to_utf8(name, utf16_length, chars); |
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|
395 |
return lookup(chars, utf8_length, THREAD); |
5c7b6f4ce0a1
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|
396 |
} else { |
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|
397 |
ResourceMark rm(THREAD); |
5c7b6f4ce0a1
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|
398 |
char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);; |
5c7b6f4ce0a1
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changeset
|
399 |
UNICODE::convert_to_utf8(name, utf16_length, chars); |
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|
400 |
return lookup(chars, utf8_length, THREAD); |
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|
401 |
} |
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changeset
|
402 |
} |
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changeset
|
403 |
|
8076
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changeset
|
404 |
Symbol* SymbolTable::lookup_only_unicode(const jchar* name, int utf16_length, |
2332
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|
405 |
unsigned int& hash) { |
5c7b6f4ce0a1
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|
406 |
int utf8_length = UNICODE::utf8_length((jchar*) name, utf16_length); |
5c7b6f4ce0a1
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|
407 |
char stack_buf[128]; |
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changeset
|
408 |
if (utf8_length < (int) sizeof(stack_buf)) { |
5c7b6f4ce0a1
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changeset
|
409 |
char* chars = stack_buf; |
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changeset
|
410 |
UNICODE::convert_to_utf8(name, utf16_length, chars); |
5c7b6f4ce0a1
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changeset
|
411 |
return lookup_only(chars, utf8_length, hash); |
5c7b6f4ce0a1
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changeset
|
412 |
} else { |
5c7b6f4ce0a1
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changeset
|
413 |
ResourceMark rm; |
5c7b6f4ce0a1
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diff
changeset
|
414 |
char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);; |
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changeset
|
415 |
UNICODE::convert_to_utf8(name, utf16_length, chars); |
5c7b6f4ce0a1
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changeset
|
416 |
return lookup_only(chars, utf8_length, hash); |
5c7b6f4ce0a1
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changeset
|
417 |
} |
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changeset
|
418 |
} |
5c7b6f4ce0a1
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changeset
|
419 |
|
33593
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8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
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diff
changeset
|
420 |
void SymbolTable::add(ClassLoaderData* loader_data, const constantPoolHandle& cp, |
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|
421 |
int names_count, |
1 | 422 |
const char** names, int* lengths, int* cp_indices, |
423 |
unsigned int* hashValues, TRAPS) { |
|
13097
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changeset
|
424 |
// Grab SymbolTable_lock first. |
c146b608d91f
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changeset
|
425 |
MutexLocker ml(SymbolTable_lock, THREAD); |
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7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
426 |
|
1 | 427 |
SymbolTable* table = the_table(); |
13728
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diff
changeset
|
428 |
bool added = table->basic_add(loader_data, cp, names_count, names, lengths, |
1 | 429 |
cp_indices, hashValues, CHECK); |
430 |
if (!added) { |
|
431 |
// do it the hard way |
|
432 |
for (int i=0; i<names_count; i++) { |
|
433 |
int index = table->hash_to_index(hashValues[i]); |
|
13728
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diff
changeset
|
434 |
bool c_heap = !loader_data->is_the_null_class_loader_data(); |
12263
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diff
changeset
|
435 |
Symbol* sym = table->basic_add(index, (u1*)names[i], lengths[i], hashValues[i], c_heap, CHECK); |
1 | 436 |
cp->symbol_at_put(cp_indices[i], sym); |
437 |
} |
|
438 |
} |
|
439 |
} |
|
440 |
||
12263
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diff
changeset
|
441 |
Symbol* SymbolTable::new_permanent_symbol(const char* name, TRAPS) { |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
coleenp
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changeset
|
442 |
unsigned int hash; |
d20640f4f8fe
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diff
changeset
|
443 |
Symbol* result = SymbolTable::lookup_only((char*)name, (int)strlen(name), hash); |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
444 |
if (result != NULL) { |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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diff
changeset
|
445 |
return result; |
d20640f4f8fe
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diff
changeset
|
446 |
} |
13097
c146b608d91f
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13087
diff
changeset
|
447 |
// Grab SymbolTable_lock first. |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
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diff
changeset
|
448 |
MutexLocker ml(SymbolTable_lock, THREAD); |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
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diff
changeset
|
449 |
|
12263
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changeset
|
450 |
SymbolTable* table = the_table(); |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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diff
changeset
|
451 |
int index = table->hash_to_index(hash); |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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parents:
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diff
changeset
|
452 |
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
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changeset
|
453 |
} |
d20640f4f8fe
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diff
changeset
|
454 |
|
13097
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diff
changeset
|
455 |
Symbol* SymbolTable::basic_add(int index_arg, u1 *name, int len, |
13087 | 456 |
unsigned int hashValue_arg, bool c_heap, TRAPS) { |
20079 | 457 |
assert(!Universe::heap()->is_in_reserved(name), |
1 | 458 |
"proposed name of symbol must be stable"); |
459 |
||
13097
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7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
460 |
// Don't allow symbols to be created which cannot fit in a Symbol*. |
c146b608d91f
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changeset
|
461 |
if (len > Symbol::max_length()) { |
c146b608d91f
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diff
changeset
|
462 |
THROW_MSG_0(vmSymbols::java_lang_InternalError(), |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
463 |
"name is too long to represent"); |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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diff
changeset
|
464 |
} |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
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diff
changeset
|
465 |
|
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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diff
changeset
|
466 |
// Cannot hit a safepoint in this function because the "this" pointer can move. |
35492
c8c0273e6b91
8146690: Make all classes in GC follow the naming convention.
david
parents:
34659
diff
changeset
|
467 |
NoSafepointVerifier nsv; |
1 | 468 |
|
13087 | 469 |
// Check if the symbol table has been rehashed, if so, need to recalculate |
13097
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changeset
|
470 |
// the hash value and index. |
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7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
471 |
unsigned int hashValue; |
c146b608d91f
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changeset
|
472 |
int index; |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
473 |
if (use_alternate_hashcode()) { |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
coleenp
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diff
changeset
|
474 |
hashValue = hash_symbol((const char*)name, len); |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
475 |
index = hash_to_index(hashValue); |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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diff
changeset
|
476 |
} else { |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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diff
changeset
|
477 |
hashValue = hashValue_arg; |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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parents:
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diff
changeset
|
478 |
index = index_arg; |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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parents:
13087
diff
changeset
|
479 |
} |
13087 | 480 |
|
1 | 481 |
// Since look-up was done lock-free, we need to check if another |
482 |
// thread beat us in the race to insert the symbol. |
|
8076
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
483 |
Symbol* test = lookup(index, (char*)name, len, hashValue); |
1 | 484 |
if (test != NULL) { |
12263
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diff
changeset
|
485 |
// A race occurred and another thread introduced the symbol. |
8076
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7397
diff
changeset
|
486 |
assert(test->refcount() != 0, "lookup should have incremented the count"); |
1 | 487 |
return test; |
488 |
} |
|
489 |
||
12263
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changeset
|
490 |
// Create a new symbol. |
d20640f4f8fe
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11480
diff
changeset
|
491 |
Symbol* sym = allocate_symbol(name, len, c_heap, CHECK_NULL); |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
492 |
assert(sym->equals((char*)name, len), "symbol must be properly initialized"); |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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diff
changeset
|
493 |
|
13195 | 494 |
HashtableEntry<Symbol*, mtSymbol>* entry = new_entry(hashValue, sym); |
1 | 495 |
add_entry(index, entry); |
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|
496 |
return sym; |
1 | 497 |
} |
498 |
||
12263
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changeset
|
499 |
// 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
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diff
changeset
|
500 |
// parsing. |
33593
60764a78fa5c
8140274: methodHandles and constantPoolHandles should be passed as const references
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33148
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changeset
|
501 |
bool SymbolTable::basic_add(ClassLoaderData* loader_data, const constantPoolHandle& cp, |
12263
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
502 |
int names_count, |
1 | 503 |
const char** names, int* lengths, |
504 |
int* cp_indices, unsigned int* hashValues, |
|
505 |
TRAPS) { |
|
12263
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|
506 |
|
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
507 |
// 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
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changeset
|
508 |
for (int i = 0; i< names_count; i++) { |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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diff
changeset
|
509 |
if (lengths[i] > Symbol::max_length()) { |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
510 |
THROW_MSG_0(vmSymbols::java_lang_InternalError(), |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
511 |
"name is too long to represent"); |
d20640f4f8fe
7150058: Allocate symbols from null boot loader to an arena for NMT
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changeset
|
512 |
} |
1 | 513 |
} |
514 |
||
13097
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changeset
|
515 |
// Cannot hit a safepoint in this function because the "this" pointer can move. |
35492
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8146690: Make all classes in GC follow the naming convention.
david
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changeset
|
516 |
NoSafepointVerifier nsv; |
1 | 517 |
|
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changeset
|
518 |
for (int i=0; i<names_count; i++) { |
13087 | 519 |
// Check if the symbol table has been rehashed, if so, need to recalculate |
520 |
// the hash value. |
|
13097
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7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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changeset
|
521 |
unsigned int hashValue; |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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diff
changeset
|
522 |
if (use_alternate_hashcode()) { |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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diff
changeset
|
523 |
hashValue = hash_symbol(names[i], lengths[i]); |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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parents:
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diff
changeset
|
524 |
} else { |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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parents:
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diff
changeset
|
525 |
hashValue = hashValues[i]; |
c146b608d91f
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
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parents:
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diff
changeset
|
526 |
} |
1 | 527 |
// Since look-up was done lock-free, we need to check if another |
528 |
// thread beat us in the race to insert the symbol. |
|
13087 | 529 |
int index = hash_to_index(hashValue); |
530 |
Symbol* test = lookup(index, names[i], lengths[i], hashValue); |
|
1 | 531 |
if (test != NULL) { |
2131 | 532 |
// A race occurred and another thread introduced the symbol, this one |
1 | 533 |
// will be dropped and collected. Use test instead. |
534 |
cp->symbol_at_put(cp_indices[i], test); |
|
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changeset
|
535 |
assert(test->refcount() != 0, "lookup should have incremented the count"); |
1 | 536 |
} else { |
12263
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7150058: Allocate symbols from null boot loader to an arena for NMT
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parents:
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diff
changeset
|
537 |
// 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
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diff
changeset
|
538 |
// are allocated specially in a permanent arena. |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
13199
diff
changeset
|
539 |
bool c_heap = !loader_data->is_the_null_class_loader_data(); |
12263
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7150058: Allocate symbols from null boot loader to an arena for NMT
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parents:
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diff
changeset
|
540 |
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:
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diff
changeset
|
541 |
assert(sym->equals(names[i], lengths[i]), "symbol must be properly initialized"); // why wouldn't it be??? |
13195 | 542 |
HashtableEntry<Symbol*, mtSymbol>* entry = new_entry(hashValue, sym); |
1 | 543 |
add_entry(index, entry); |
544 |
cp->symbol_at_put(cp_indices[i], sym); |
|
545 |
} |
|
546 |
} |
|
547 |
return true; |
|
548 |
} |
|
549 |
||
550 |
||
551 |
void SymbolTable::verify() { |
|
552 |
for (int i = 0; i < the_table()->table_size(); ++i) { |
|
13195 | 553 |
HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i); |
1 | 554 |
for ( ; p != NULL; p = p->next()) { |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
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diff
changeset
|
555 |
Symbol* s = (Symbol*)(p->literal()); |
1 | 556 |
guarantee(s != NULL, "symbol is NULL"); |
557 |
unsigned int h = hash_symbol((char*)s->bytes(), s->utf8_length()); |
|
558 |
guarantee(p->hash() == h, "broken hash in symbol table entry"); |
|
559 |
guarantee(the_table()->hash_to_index(h) == i, |
|
560 |
"wrong index in symbol table"); |
|
561 |
} |
|
562 |
} |
|
563 |
} |
|
564 |
||
28363
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jiangli
parents:
27677
diff
changeset
|
565 |
void SymbolTable::dump(outputStream* st, bool verbose) { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
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parents:
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diff
changeset
|
566 |
if (!verbose) { |
46742 | 567 |
the_table()->print_table_statistics(st, "SymbolTable"); |
28363
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jiangli
parents:
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diff
changeset
|
568 |
} else { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
569 |
st->print_cr("VERSION: 1.0"); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
570 |
for (int i = 0; i < the_table()->table_size(); ++i) { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
571 |
HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
572 |
for ( ; p != NULL; p = p->next()) { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
573 |
Symbol* s = (Symbol*)(p->literal()); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
574 |
const char* utf8_string = (const char*)s->bytes(); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
575 |
int utf8_length = s->utf8_length(); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
576 |
st->print("%d %d: ", utf8_length, s->refcount()); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
577 |
HashtableTextDump::put_utf8(st, utf8_string, utf8_length); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
578 |
st->cr(); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
579 |
} |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
580 |
} |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
581 |
} |
13087 | 582 |
} |
583 |
||
46746
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
584 |
void SymbolTable::write_to_archive() { |
28363
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
585 |
#if INCLUDE_CDS |
46746
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
586 |
_shared_table.reset(); |
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
587 |
|
37995 | 588 |
int num_buckets = the_table()->number_of_entries() / |
589 |
SharedSymbolTableBucketSize; |
|
590 |
CompactSymbolTableWriter writer(num_buckets, |
|
591 |
&MetaspaceShared::stats()->symbol); |
|
592 |
for (int i = 0; i < the_table()->table_size(); ++i) { |
|
593 |
HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i); |
|
594 |
for ( ; p != NULL; p = p->next()) { |
|
595 |
Symbol* s = (Symbol*)(p->literal()); |
|
596 |
unsigned int fixed_hash = hash_shared_symbol((char*)s->bytes(), s->utf8_length()); |
|
597 |
assert(fixed_hash == p->hash(), "must not rehash during dumping"); |
|
598 |
writer.add(fixed_hash, s); |
|
599 |
} |
|
600 |
} |
|
601 |
||
602 |
writer.dump(&_shared_table); |
|
28363
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
603 |
|
37995 | 604 |
// Verify table is correct |
605 |
Symbol* sym = vmSymbols::java_lang_Object(); |
|
606 |
const char* name = (const char*)sym->bytes(); |
|
607 |
int len = sym->utf8_length(); |
|
608 |
unsigned int hash = hash_symbol(name, len); |
|
609 |
assert(sym == _shared_table.lookup(name, hash, len), "sanity"); |
|
46746
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
610 |
#endif |
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
611 |
} |
28363
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
612 |
|
46746
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
613 |
void SymbolTable::serialize(SerializeClosure* soc) { |
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
614 |
#if INCLUDE_CDS |
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
615 |
_shared_table.set_type(CompactHashtable<Symbol*, char>::_symbol_table); |
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
616 |
_shared_table.serialize(soc); |
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
617 |
|
ea379ebb9447
8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents:
46742
diff
changeset
|
618 |
if (soc->writing()) { |
37995 | 619 |
// Sanity. Make sure we don't use the shared table at dump time |
620 |
_shared_table.reset(); |
|
621 |
} |
|
28363
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
622 |
#endif |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
623 |
} |
1 | 624 |
|
625 |
//--------------------------------------------------------------------------- |
|
626 |
// Non-product code |
|
627 |
||
628 |
#ifndef PRODUCT |
|
629 |
||
630 |
void SymbolTable::print_histogram() { |
|
631 |
MutexLocker ml(SymbolTable_lock); |
|
632 |
const int results_length = 100; |
|
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
633 |
int counts[results_length]; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
634 |
int sizes[results_length]; |
1 | 635 |
int i,j; |
636 |
||
637 |
// initialize results to zero |
|
638 |
for (j = 0; j < results_length; j++) { |
|
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
639 |
counts[j] = 0; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
640 |
sizes[j] = 0; |
1 | 641 |
} |
642 |
||
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
643 |
int total_size = 0; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
644 |
int total_count = 0; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
645 |
int total_length = 0; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
646 |
int max_length = 0; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
647 |
int out_of_range_count = 0; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
648 |
int out_of_range_size = 0; |
1 | 649 |
for (i = 0; i < the_table()->table_size(); i++) { |
13195 | 650 |
HashtableEntry<Symbol*, mtSymbol>* p = the_table()->bucket(i); |
1 | 651 |
for ( ; p != NULL; p = p->next()) { |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
652 |
int size = p->literal()->size(); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
653 |
int len = p->literal()->utf8_length(); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
654 |
if (len < results_length) { |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
655 |
counts[len]++; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
656 |
sizes[len] += size; |
1 | 657 |
} else { |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
658 |
out_of_range_count++; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
659 |
out_of_range_size += size; |
1 | 660 |
} |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
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parents:
26421
diff
changeset
|
661 |
total_count++; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
662 |
total_size += size; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
663 |
total_length += len; |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
664 |
max_length = MAX2(max_length, len); |
1 | 665 |
} |
666 |
} |
|
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
667 |
tty->print_cr("Symbol Table Histogram:"); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
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parents:
26421
diff
changeset
|
668 |
tty->print_cr(" Total number of symbols %7d", total_count); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
669 |
tty->print_cr(" Total size in memory %7dK", |
35898
ddc274f0052f
8145628: hotspot metadata classes shouldn't use HeapWordSize or heap related macros like align_object_size
coleenp
parents:
35497
diff
changeset
|
670 |
(total_size*wordSize)/1024); |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
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parents:
26421
diff
changeset
|
671 |
tty->print_cr(" Total counted %7d", _symbols_counted); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
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parents:
26421
diff
changeset
|
672 |
tty->print_cr(" Total removed %7d", _symbols_removed); |
22545
b93a7f0e9b9d
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
20283
diff
changeset
|
673 |
if (_symbols_counted > 0) { |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
674 |
tty->print_cr(" Percent removed %3.2f", |
22545
b93a7f0e9b9d
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
20283
diff
changeset
|
675 |
((float)_symbols_removed/(float)_symbols_counted)* 100); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
676 |
} |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
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parents:
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diff
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|
677 |
tty->print_cr(" Reference counts %7d", Symbol::_total_count); |
33148
68fa8b6c4340
8042893: compiler: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
31790
diff
changeset
|
678 |
tty->print_cr(" Symbol arena used " SIZE_FORMAT_W(7) "K", arena()->used()/1024); |
68fa8b6c4340
8042893: compiler: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
31790
diff
changeset
|
679 |
tty->print_cr(" Symbol arena size " SIZE_FORMAT_W(7) "K", arena()->size_in_bytes()/1024); |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
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parents:
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changeset
|
680 |
tty->print_cr(" Total symbol length %7d", total_length); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
681 |
tty->print_cr(" Maximum symbol length %7d", max_length); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
682 |
tty->print_cr(" Average symbol length %7.2f", ((float) total_length / (float) total_count)); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
683 |
tty->print_cr(" Symbol length histogram:"); |
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
684 |
tty->print_cr(" %6s %10s %10s", "Length", "#Symbols", "Size"); |
1 | 685 |
for (i = 0; i < results_length; i++) { |
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
686 |
if (counts[i] > 0) { |
35898
ddc274f0052f
8145628: hotspot metadata classes shouldn't use HeapWordSize or heap related macros like align_object_size
coleenp
parents:
35497
diff
changeset
|
687 |
tty->print_cr(" %6d %10d %10dK", i, counts[i], (sizes[i]*wordSize)/1024); |
1 | 688 |
} |
689 |
} |
|
26923
60c1555c25c5
8057925: PrintSymbolTableSizeHistogram prints misleading output
shade
parents:
26421
diff
changeset
|
690 |
tty->print_cr(" >=%6d %10d %10dK\n", results_length, |
35898
ddc274f0052f
8145628: hotspot metadata classes shouldn't use HeapWordSize or heap related macros like align_object_size
coleenp
parents:
35497
diff
changeset
|
691 |
out_of_range_count, (out_of_range_size*wordSize)/1024); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
692 |
} |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
693 |
|
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
694 |
void SymbolTable::print() { |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
695 |
for (int i = 0; i < the_table()->table_size(); ++i) { |
13195 | 696 |
HashtableEntry<Symbol*, mtSymbol>** p = the_table()->bucket_addr(i); |
697 |
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
|
698 |
if (entry != NULL) { |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
699 |
while (entry != NULL) { |
33148
68fa8b6c4340
8042893: compiler: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
31790
diff
changeset
|
700 |
tty->print(PTR_FORMAT " ", p2i(entry->literal())); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
701 |
entry->literal()->print(); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
702 |
tty->print(" %d", entry->literal()->refcount()); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
703 |
p = entry->next_addr(); |
13195 | 704 |
entry = (HashtableEntry<Symbol*, mtSymbol>*)HashtableEntry<Symbol*, mtSymbol>::make_ptr(*p); |
1 | 705 |
} |
706 |
tty->cr(); |
|
707 |
} |
|
708 |
} |
|
709 |
} |
|
710 |
#endif // PRODUCT |
|
28363
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
711 |
|
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
712 |
|
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
713 |
// Utility for dumping symbols |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
714 |
SymboltableDCmd::SymboltableDCmd(outputStream* output, bool heap) : |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
715 |
DCmdWithParser(output, heap), |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
716 |
_verbose("-verbose", "Dump the content of each symbol in the table", |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
717 |
"BOOLEAN", false, "false") { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
718 |
_dcmdparser.add_dcmd_option(&_verbose); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
719 |
} |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
720 |
|
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
721 |
void SymboltableDCmd::execute(DCmdSource source, TRAPS) { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
722 |
VM_DumpHashtable dumper(output(), VM_DumpHashtable::DumpSymbols, |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
723 |
_verbose.value()); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
724 |
VMThread::execute(&dumper); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
725 |
} |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
726 |
|
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
727 |
int SymboltableDCmd::num_arguments() { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
728 |
ResourceMark rm; |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
729 |
SymboltableDCmd* dcmd = new SymboltableDCmd(NULL, false); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
730 |
if (dcmd != NULL) { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
731 |
DCmdMark mark(dcmd); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
732 |
return dcmd->_dcmdparser.num_arguments(); |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
733 |
} else { |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
734 |
return 0; |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
735 |
} |
047115468f16
8059510: Compact symbol table layout inside shared archive.
jiangli
parents:
27677
diff
changeset
|
736 |
} |