truffle: src/share/vm/classfile/symbolTable.cpp annotate

annotate src/share/vm/classfile/symbolTable.cpp @ 6086:cdd249497b34

7170053: crash in C2 when using -XX:+CountCompiledCalls Reviewed-by: kvn, twisti Contributed-by: Krystal Mok <sajia@taobao.com>

author	twisti
date	Fri, 18 May 2012 12:20:24 -0700
parents	fc9d8850ab8b
children	e9140bf80b4a

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 665 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 665 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 665 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	26 #include "classfile/javaClasses.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	27 #include "classfile/symbolTable.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	28 #include "classfile/systemDictionary.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	29 #include "gc_interface/collectedHeap.inline.hpp"
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	30 #include "memory/allocation.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	31 #include "memory/filemap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	32 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	33 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	34 #include "oops/oop.inline2.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	35 #include "runtime/mutexLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	36 #include "utilities/hashtable.inline.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	37
a61af66fc99e Initial load duke parents: diff changeset	38 // --------------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	39
a61af66fc99e Initial load duke parents: diff changeset	40 SymbolTable* SymbolTable::_the_table = NULL;
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	41 // Static arena for symbols that are not deallocated
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	42 Arena* SymbolTable::_arena = NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	43
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	44 Symbol* SymbolTable::allocate_symbol(const u1* name, int len, bool c_heap, TRAPS) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	45 // Don't allow symbols to be created which cannot fit in a Symbol*.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	46 if (len > Symbol::max_length()) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	47 THROW_MSG_0(vmSymbols::java_lang_InternalError(),
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	48 "name is too long to represent");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	49 }
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	50 Symbol* sym;
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	51 // Allocate symbols in the C heap when dumping shared spaces in case there
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	52 // are temporary symbols we can remove.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	53 if (c_heap \|\| DumpSharedSpaces) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	54 // refcount starts as 1
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	55 sym = new (len, THREAD) Symbol(name, len, 1);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	56 } else {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	57 sym = new (len, arena(), THREAD) Symbol(name, len, -1);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	58 }
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	59 assert(sym != NULL, "new should call vm_exit_out_of_memory if C_HEAP is exhausted");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	60 return sym;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	61 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	62
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	63 void SymbolTable::initialize_symbols(int arena_alloc_size) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	64 // Initialize the arena for global symbols, size passed in depends on CDS.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	65 if (arena_alloc_size == 0) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	66 _arena = new Arena();
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	67 } else {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	68 _arena = new Arena(arena_alloc_size);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	69 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	70 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	71
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	72 // Call function for all symbols in the symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	73 void SymbolTable::symbols_do(SymbolClosure *cl) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	74 const int n = the_table()->table_size();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	75 for (int i = 0; i < n; i++) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	76 for (HashtableEntry<Symbol> p = the_table()->bucket(i);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	77 p != NULL;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	78 p = p->next()) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	79 cl->do_symbol(p->literal_addr());
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	80 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	81 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	82 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	83
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	84 int SymbolTable::symbols_removed = 0;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	85 int SymbolTable::symbols_counted = 0;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	86
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	87 // Remove unreferenced symbols from the symbol table
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	88 // This is done late during GC.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	89 void SymbolTable::unlink() {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	90 int removed = 0;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	91 int total = 0;
2336 df1347358fe6 7024584: Symbol printouts shouldnt be under PrintGCDetails coleenp parents: 2177 diff changeset	92 size_t memory_total = 0;
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	93 for (int i = 0; i < the_table()->table_size(); ++i) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	94 for (HashtableEntry<Symbol>* p = the_table()->bucket_addr(i); *p != NULL; ) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	95 HashtableEntry<Symbol> entry = *p;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	96 if (entry->is_shared()) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	97 break;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	98 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	99 Symbol* s = entry->literal();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	100 memory_total += s->object_size();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	101 total++;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	102 assert(s != NULL, "just checking");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	103 // If reference count is zero, remove.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	104 if (s->refcount() == 0) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	105 delete s;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	106 removed++;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	107 *p = entry->next();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	108 the_table()->free_entry(entry);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	109 } else {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	110 p = entry->next_addr();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	111 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	112 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	113 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	114 symbols_removed += removed;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	115 symbols_counted += total;
2336 df1347358fe6 7024584: Symbol printouts shouldnt be under PrintGCDetails coleenp parents: 2177 diff changeset	116 // Exclude printing for normal PrintGCDetails because people parse
df1347358fe6 7024584: Symbol printouts shouldnt be under PrintGCDetails coleenp parents: 2177 diff changeset	117 // this output.
df1347358fe6 7024584: Symbol printouts shouldnt be under PrintGCDetails coleenp parents: 2177 diff changeset	118 if (PrintGCDetails && Verbose && WizardMode) {
df1347358fe6 7024584: Symbol printouts shouldnt be under PrintGCDetails coleenp parents: 2177 diff changeset	119 gclog_or_tty->print(" [Symbols=%d size=" SIZE_FORMAT "K] ", total,
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	120 (memory_total*HeapWordSize)/1024);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	121 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	122 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	123
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	124
0 a61af66fc99e Initial load duke parents: diff changeset	125 // Lookup a symbol in a bucket.
a61af66fc99e Initial load duke parents: diff changeset	126
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	127 Symbol* SymbolTable::lookup(int index, const char* name,
0 a61af66fc99e Initial load duke parents: diff changeset	128 int len, unsigned int hash) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	129 for (HashtableEntry<Symbol> e = bucket(index); e != NULL; e = e->next()) {
0 a61af66fc99e Initial load duke parents: diff changeset	130 if (e->hash() == hash) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	131 Symbol* sym = e->literal();
0 a61af66fc99e Initial load duke parents: diff changeset	132 if (sym->equals(name, len)) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	133 // something is referencing this symbol now.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	134 sym->increment_refcount();
0 a61af66fc99e Initial load duke parents: diff changeset	135 return sym;
a61af66fc99e Initial load duke parents: diff changeset	136 }
a61af66fc99e Initial load duke parents: diff changeset	137 }
a61af66fc99e Initial load duke parents: diff changeset	138 }
a61af66fc99e Initial load duke parents: diff changeset	139 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	140 }
a61af66fc99e Initial load duke parents: diff changeset	141
a61af66fc99e Initial load duke parents: diff changeset	142
a61af66fc99e Initial load duke parents: diff changeset	143 // We take care not to be blocking while holding the
a61af66fc99e Initial load duke parents: diff changeset	144 // SymbolTable_lock. Otherwise, the system might deadlock, since the
a61af66fc99e Initial load duke parents: diff changeset	145 // symboltable is used during compilation (VM_thread) The lock free
a61af66fc99e Initial load duke parents: diff changeset	146 // synchronization is simplified by the fact that we do not delete
a61af66fc99e Initial load duke parents: diff changeset	147 // entries in the symbol table during normal execution (only during
a61af66fc99e Initial load duke parents: diff changeset	148 // safepoints).
a61af66fc99e Initial load duke parents: diff changeset	149
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	150 Symbol* SymbolTable::lookup(const char* name, int len, TRAPS) {
0 a61af66fc99e Initial load duke parents: diff changeset	151 unsigned int hashValue = hash_symbol(name, len);
a61af66fc99e Initial load duke parents: diff changeset	152 int index = the_table()->hash_to_index(hashValue);
a61af66fc99e Initial load duke parents: diff changeset	153
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	154 Symbol* s = the_table()->lookup(index, name, len, hashValue);
0 a61af66fc99e Initial load duke parents: diff changeset	155
a61af66fc99e Initial load duke parents: diff changeset	156 // Found
a61af66fc99e Initial load duke parents: diff changeset	157 if (s != NULL) return s;
a61af66fc99e Initial load duke parents: diff changeset	158
a61af66fc99e Initial load duke parents: diff changeset	159 // Otherwise, add to symbol to table
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	160 return the_table()->basic_add(index, (u1*)name, len, hashValue, true, CHECK_NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	161 }
a61af66fc99e Initial load duke parents: diff changeset	162
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	163 Symbol* SymbolTable::lookup(const Symbol* sym, int begin, int end, TRAPS) {
0 a61af66fc99e Initial load duke parents: diff changeset	164 char* buffer;
a61af66fc99e Initial load duke parents: diff changeset	165 int index, len;
a61af66fc99e Initial load duke parents: diff changeset	166 unsigned int hashValue;
a61af66fc99e Initial load duke parents: diff changeset	167 char* name;
a61af66fc99e Initial load duke parents: diff changeset	168 {
a61af66fc99e Initial load duke parents: diff changeset	169 debug_only(No_Safepoint_Verifier nsv;)
a61af66fc99e Initial load duke parents: diff changeset	170
a61af66fc99e Initial load duke parents: diff changeset	171 name = (char*)sym->base() + begin;
a61af66fc99e Initial load duke parents: diff changeset	172 len = end - begin;
a61af66fc99e Initial load duke parents: diff changeset	173 hashValue = hash_symbol(name, len);
a61af66fc99e Initial load duke parents: diff changeset	174 index = the_table()->hash_to_index(hashValue);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	175 Symbol* s = the_table()->lookup(index, name, len, hashValue);
0 a61af66fc99e Initial load duke parents: diff changeset	176
a61af66fc99e Initial load duke parents: diff changeset	177 // Found
a61af66fc99e Initial load duke parents: diff changeset	178 if (s != NULL) return s;
a61af66fc99e Initial load duke parents: diff changeset	179 }
a61af66fc99e Initial load duke parents: diff changeset	180
a61af66fc99e Initial load duke parents: diff changeset	181 // Otherwise, add to symbol to table. Copy to a C string first.
a61af66fc99e Initial load duke parents: diff changeset	182 char stack_buf[128];
a61af66fc99e Initial load duke parents: diff changeset	183 ResourceMark rm(THREAD);
a61af66fc99e Initial load duke parents: diff changeset	184 if (len <= 128) {
a61af66fc99e Initial load duke parents: diff changeset	185 buffer = stack_buf;
a61af66fc99e Initial load duke parents: diff changeset	186 } else {
a61af66fc99e Initial load duke parents: diff changeset	187 buffer = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len);
a61af66fc99e Initial load duke parents: diff changeset	188 }
a61af66fc99e Initial load duke parents: diff changeset	189 for (int i=0; i<len; i++) {
a61af66fc99e Initial load duke parents: diff changeset	190 buffer[i] = name[i];
a61af66fc99e Initial load duke parents: diff changeset	191 }
a61af66fc99e Initial load duke parents: diff changeset	192 // Make sure there is no safepoint in the code above since name can't move.
a61af66fc99e Initial load duke parents: diff changeset	193 // We can't include the code in No_Safepoint_Verifier because of the
a61af66fc99e Initial load duke parents: diff changeset	194 // ResourceMark.
a61af66fc99e Initial load duke parents: diff changeset	195
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	196 return the_table()->basic_add(index, (u1*)buffer, len, hashValue, true, CHECK_NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	197 }
a61af66fc99e Initial load duke parents: diff changeset	198
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	199 Symbol* SymbolTable::lookup_only(const char* name, int len,
0 a61af66fc99e Initial load duke parents: diff changeset	200 unsigned int& hash) {
a61af66fc99e Initial load duke parents: diff changeset	201 hash = hash_symbol(name, len);
a61af66fc99e Initial load duke parents: diff changeset	202 int index = the_table()->hash_to_index(hash);
a61af66fc99e Initial load duke parents: diff changeset	203
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	204 Symbol* s = the_table()->lookup(index, name, len, hash);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	205 return s;
0 a61af66fc99e Initial load duke parents: diff changeset	206 }
a61af66fc99e Initial load duke parents: diff changeset	207
4800 94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	208 // Look up the address of the literal in the SymbolTable for this Symbol*
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	209 // Do not create any new symbols
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	210 // Do not increment the reference count to keep this alive
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	211 Symbol** SymbolTable::lookup_symbol_addr(Symbol* sym){
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	212 unsigned int hash = hash_symbol((char*)sym->bytes(), sym->utf8_length());
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	213 int index = the_table()->hash_to_index(hash);
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	214
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	215 for (HashtableEntry<Symbol> e = the_table()->bucket(index); e != NULL; e = e->next()) {
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	216 if (e->hash() == hash) {
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	217 Symbol* literal_sym = e->literal();
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	218 if (sym == literal_sym) {
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	219 return e->literal_addr();
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	220 }
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	221 }
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	222 }
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	223 return NULL;
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	224 }
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	225
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	226 // Suggestion: Push unicode-based lookup all the way into the hashing
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	227 // and probing logic, so there is no need for convert_to_utf8 until
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	228 // an actual new Symbol* is created.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	229 Symbol* SymbolTable::lookup_unicode(const jchar* name, int utf16_length, TRAPS) {
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	230 int utf8_length = UNICODE::utf8_length((jchar*) name, utf16_length);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	231 char stack_buf[128];
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	232 if (utf8_length < (int) sizeof(stack_buf)) {
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	233 char* chars = stack_buf;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	234 UNICODE::convert_to_utf8(name, utf16_length, chars);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	235 return lookup(chars, utf8_length, THREAD);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	236 } else {
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	237 ResourceMark rm(THREAD);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	238 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	239 UNICODE::convert_to_utf8(name, utf16_length, chars);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	240 return lookup(chars, utf8_length, THREAD);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	241 }
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	242 }
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	243
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	244 Symbol* SymbolTable::lookup_only_unicode(const jchar* name, int utf16_length,
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	245 unsigned int& hash) {
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	246 int utf8_length = UNICODE::utf8_length((jchar*) name, utf16_length);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	247 char stack_buf[128];
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	248 if (utf8_length < (int) sizeof(stack_buf)) {
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	249 char* chars = stack_buf;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	250 UNICODE::convert_to_utf8(name, utf16_length, chars);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	251 return lookup_only(chars, utf8_length, hash);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	252 } else {
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	253 ResourceMark rm;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	254 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	255 UNICODE::convert_to_utf8(name, utf16_length, chars);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	256 return lookup_only(chars, utf8_length, hash);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	257 }
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	258 }
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 605 diff changeset	259
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	260 void SymbolTable::add(Handle class_loader, constantPoolHandle cp,
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	261 int names_count,
0 a61af66fc99e Initial load duke parents: diff changeset	262 const char** names, int* lengths, int* cp_indices,
a61af66fc99e Initial load duke parents: diff changeset	263 unsigned int* hashValues, TRAPS) {
a61af66fc99e Initial load duke parents: diff changeset	264 SymbolTable* table = the_table();
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	265 bool added = table->basic_add(class_loader, cp, names_count, names, lengths,
0 a61af66fc99e Initial load duke parents: diff changeset	266 cp_indices, hashValues, CHECK);
a61af66fc99e Initial load duke parents: diff changeset	267 if (!added) {
a61af66fc99e Initial load duke parents: diff changeset	268 // do it the hard way
a61af66fc99e Initial load duke parents: diff changeset	269 for (int i=0; i<names_count; i++) {
a61af66fc99e Initial load duke parents: diff changeset	270 int index = table->hash_to_index(hashValues[i]);
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	271 bool c_heap = class_loader() != NULL;
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	272 Symbol* sym = table->basic_add(index, (u1*)names[i], lengths[i], hashValues[i], c_heap, CHECK);
0 a61af66fc99e Initial load duke parents: diff changeset	273 cp->symbol_at_put(cp_indices[i], sym);
a61af66fc99e Initial load duke parents: diff changeset	274 }
a61af66fc99e Initial load duke parents: diff changeset	275 }
a61af66fc99e Initial load duke parents: diff changeset	276 }
a61af66fc99e Initial load duke parents: diff changeset	277
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	278 Symbol* SymbolTable::new_permanent_symbol(const char* name, TRAPS) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	279 unsigned int hash;
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	280 Symbol* result = SymbolTable::lookup_only((char*)name, (int)strlen(name), hash);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	281 if (result != NULL) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	282 return result;
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	283 }
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	284 SymbolTable* table = the_table();
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	285 int index = table->hash_to_index(hash);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	286 return table->basic_add(index, (u1*)name, (int)strlen(name), hash, false, THREAD);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	287 }
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	288
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	289 Symbol* SymbolTable::basic_add(int index, u1 *name, int len,
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	290 unsigned int hashValue, bool c_heap, TRAPS) {
0 a61af66fc99e Initial load duke parents: diff changeset	291 assert(!Universe::heap()->is_in_reserved(name) \|\| GC_locker::is_active(),
a61af66fc99e Initial load duke parents: diff changeset	292 "proposed name of symbol must be stable");
a61af66fc99e Initial load duke parents: diff changeset	293
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	294 // Grab SymbolTable_lock first.
0 a61af66fc99e Initial load duke parents: diff changeset	295 MutexLocker ml(SymbolTable_lock, THREAD);
a61af66fc99e Initial load duke parents: diff changeset	296
a61af66fc99e Initial load duke parents: diff changeset	297 // Since look-up was done lock-free, we need to check if another
a61af66fc99e Initial load duke parents: diff changeset	298 // thread beat us in the race to insert the symbol.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	299 Symbol* test = lookup(index, (char*)name, len, hashValue);
0 a61af66fc99e Initial load duke parents: diff changeset	300 if (test != NULL) {
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	301 // A race occurred and another thread introduced the symbol.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	302 assert(test->refcount() != 0, "lookup should have incremented the count");
0 a61af66fc99e Initial load duke parents: diff changeset	303 return test;
a61af66fc99e Initial load duke parents: diff changeset	304 }
a61af66fc99e Initial load duke parents: diff changeset	305
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	306 // Create a new symbol.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	307 Symbol* sym = allocate_symbol(name, len, c_heap, CHECK_NULL);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	308 assert(sym->equals((char*)name, len), "symbol must be properly initialized");
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	309
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	310 HashtableEntry<Symbol> entry = new_entry(hashValue, sym);
0 a61af66fc99e Initial load duke parents: diff changeset	311 add_entry(index, entry);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	312 return sym;
0 a61af66fc99e Initial load duke parents: diff changeset	313 }
a61af66fc99e Initial load duke parents: diff changeset	314
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	315 // This version of basic_add adds symbols in batch from the constant pool
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	316 // parsing.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	317 bool SymbolTable::basic_add(Handle class_loader, constantPoolHandle cp,
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	318 int names_count,
0 a61af66fc99e Initial load duke parents: diff changeset	319 const char** names, int* lengths,
a61af66fc99e Initial load duke parents: diff changeset	320 int* cp_indices, unsigned int* hashValues,
a61af66fc99e Initial load duke parents: diff changeset	321 TRAPS) {
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	322
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	323 // Check symbol names are not too long. If any are too long, don't add any.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	324 for (int i = 0; i< names_count; i++) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	325 if (lengths[i] > Symbol::max_length()) {
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	326 THROW_MSG_0(vmSymbols::java_lang_InternalError(),
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	327 "name is too long to represent");
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	328 }
0 a61af66fc99e Initial load duke parents: diff changeset	329 }
a61af66fc99e Initial load duke parents: diff changeset	330
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	331 // Hold SymbolTable_lock through the symbol creation
0 a61af66fc99e Initial load duke parents: diff changeset	332 MutexLocker ml(SymbolTable_lock, THREAD);
a61af66fc99e Initial load duke parents: diff changeset	333
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	334 for (int i=0; i<names_count; i++) {
0 a61af66fc99e Initial load duke parents: diff changeset	335 // Since look-up was done lock-free, we need to check if another
a61af66fc99e Initial load duke parents: diff changeset	336 // thread beat us in the race to insert the symbol.
a61af66fc99e Initial load duke parents: diff changeset	337 int index = hash_to_index(hashValues[i]);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	338 Symbol* test = lookup(index, names[i], lengths[i], hashValues[i]);
0 a61af66fc99e Initial load duke parents: diff changeset	339 if (test != NULL) {
605 98cb887364d3 6810672: Comment typos twisti parents: 0 diff changeset	340 // A race occurred and another thread introduced the symbol, this one
0 a61af66fc99e Initial load duke parents: diff changeset	341 // will be dropped and collected. Use test instead.
a61af66fc99e Initial load duke parents: diff changeset	342 cp->symbol_at_put(cp_indices[i], test);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	343 assert(test->refcount() != 0, "lookup should have incremented the count");
0 a61af66fc99e Initial load duke parents: diff changeset	344 } else {
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	345 // Create a new symbol. The null class loader is never unloaded so these
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	346 // are allocated specially in a permanent arena.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	347 bool c_heap = class_loader() != NULL;
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	348 Symbol* sym = allocate_symbol((const u1*)names[i], lengths[i], c_heap, CHECK_(false));
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	349 assert(sym->equals(names[i], lengths[i]), "symbol must be properly initialized"); // why wouldn't it be???
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	350 HashtableEntry<Symbol> entry = new_entry(hashValues[i], sym);
0 a61af66fc99e Initial load duke parents: diff changeset	351 add_entry(index, entry);
a61af66fc99e Initial load duke parents: diff changeset	352 cp->symbol_at_put(cp_indices[i], sym);
a61af66fc99e Initial load duke parents: diff changeset	353 }
a61af66fc99e Initial load duke parents: diff changeset	354 }
a61af66fc99e Initial load duke parents: diff changeset	355 return true;
a61af66fc99e Initial load duke parents: diff changeset	356 }
a61af66fc99e Initial load duke parents: diff changeset	357
a61af66fc99e Initial load duke parents: diff changeset	358
a61af66fc99e Initial load duke parents: diff changeset	359 void SymbolTable::verify() {
a61af66fc99e Initial load duke parents: diff changeset	360 for (int i = 0; i < the_table()->table_size(); ++i) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	361 HashtableEntry<Symbol> p = the_table()->bucket(i);
0 a61af66fc99e Initial load duke parents: diff changeset	362 for ( ; p != NULL; p = p->next()) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	363 Symbol* s = (Symbol*)(p->literal());
0 a61af66fc99e Initial load duke parents: diff changeset	364 guarantee(s != NULL, "symbol is NULL");
a61af66fc99e Initial load duke parents: diff changeset	365 unsigned int h = hash_symbol((char*)s->bytes(), s->utf8_length());
a61af66fc99e Initial load duke parents: diff changeset	366 guarantee(p->hash() == h, "broken hash in symbol table entry");
a61af66fc99e Initial load duke parents: diff changeset	367 guarantee(the_table()->hash_to_index(h) == i,
a61af66fc99e Initial load duke parents: diff changeset	368 "wrong index in symbol table");
a61af66fc99e Initial load duke parents: diff changeset	369 }
a61af66fc99e Initial load duke parents: diff changeset	370 }
a61af66fc99e Initial load duke parents: diff changeset	371 }
a61af66fc99e Initial load duke parents: diff changeset	372
a61af66fc99e Initial load duke parents: diff changeset	373
a61af66fc99e Initial load duke parents: diff changeset	374 //---------------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	375 // Non-product code
a61af66fc99e Initial load duke parents: diff changeset	376
a61af66fc99e Initial load duke parents: diff changeset	377 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	378
a61af66fc99e Initial load duke parents: diff changeset	379 void SymbolTable::print_histogram() {
a61af66fc99e Initial load duke parents: diff changeset	380 MutexLocker ml(SymbolTable_lock);
a61af66fc99e Initial load duke parents: diff changeset	381 const int results_length = 100;
a61af66fc99e Initial load duke parents: diff changeset	382 int results[results_length];
a61af66fc99e Initial load duke parents: diff changeset	383 int i,j;
a61af66fc99e Initial load duke parents: diff changeset	384
a61af66fc99e Initial load duke parents: diff changeset	385 // initialize results to zero
a61af66fc99e Initial load duke parents: diff changeset	386 for (j = 0; j < results_length; j++) {
a61af66fc99e Initial load duke parents: diff changeset	387 results[j] = 0;
a61af66fc99e Initial load duke parents: diff changeset	388 }
a61af66fc99e Initial load duke parents: diff changeset	389
a61af66fc99e Initial load duke parents: diff changeset	390 int total = 0;
a61af66fc99e Initial load duke parents: diff changeset	391 int max_symbols = 0;
a61af66fc99e Initial load duke parents: diff changeset	392 int out_of_range = 0;
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	393 int memory_total = 0;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	394 int count = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	395 for (i = 0; i < the_table()->table_size(); i++) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	396 HashtableEntry<Symbol> p = the_table()->bucket(i);
0 a61af66fc99e Initial load duke parents: diff changeset	397 for ( ; p != NULL; p = p->next()) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	398 memory_total += p->literal()->object_size();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	399 count++;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	400 int counter = p->literal()->utf8_length();
0 a61af66fc99e Initial load duke parents: diff changeset	401 total += counter;
a61af66fc99e Initial load duke parents: diff changeset	402 if (counter < results_length) {
a61af66fc99e Initial load duke parents: diff changeset	403 results[counter]++;
a61af66fc99e Initial load duke parents: diff changeset	404 } else {
a61af66fc99e Initial load duke parents: diff changeset	405 out_of_range++;
a61af66fc99e Initial load duke parents: diff changeset	406 }
a61af66fc99e Initial load duke parents: diff changeset	407 max_symbols = MAX2(max_symbols, counter);
a61af66fc99e Initial load duke parents: diff changeset	408 }
a61af66fc99e Initial load duke parents: diff changeset	409 }
a61af66fc99e Initial load duke parents: diff changeset	410 tty->print_cr("Symbol Table:");
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	411 tty->print_cr("Total number of symbols %5d", count);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	412 tty->print_cr("Total size in memory %5dK",
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	413 (memory_total*HeapWordSize)/1024);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	414 tty->print_cr("Total counted %5d", symbols_counted);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	415 tty->print_cr("Total removed %5d", symbols_removed);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	416 if (symbols_counted > 0) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	417 tty->print_cr("Percent removed %3.2f",
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	418 ((float)symbols_removed/(float)symbols_counted)* 100);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	419 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	420 tty->print_cr("Reference counts %5d", Symbol::_total_count);
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	421 tty->print_cr("Symbol arena size %5d used %5d",
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	422 arena()->size_in_bytes(), arena()->used());
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	423 tty->print_cr("Histogram of symbol length:");
0 a61af66fc99e Initial load duke parents: diff changeset	424 tty->print_cr("%8s %5d", "Total ", total);
a61af66fc99e Initial load duke parents: diff changeset	425 tty->print_cr("%8s %5d", "Maximum", max_symbols);
a61af66fc99e Initial load duke parents: diff changeset	426 tty->print_cr("%8s %3.2f", "Average",
a61af66fc99e Initial load duke parents: diff changeset	427 ((float) total / (float) the_table()->table_size()));
a61af66fc99e Initial load duke parents: diff changeset	428 tty->print_cr("%s", "Histogram:");
a61af66fc99e Initial load duke parents: diff changeset	429 tty->print_cr(" %s %29s", "Length", "Number chains that length");
a61af66fc99e Initial load duke parents: diff changeset	430 for (i = 0; i < results_length; i++) {
a61af66fc99e Initial load duke parents: diff changeset	431 if (results[i] > 0) {
a61af66fc99e Initial load duke parents: diff changeset	432 tty->print_cr("%6d %10d", i, results[i]);
a61af66fc99e Initial load duke parents: diff changeset	433 }
a61af66fc99e Initial load duke parents: diff changeset	434 }
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	435 if (Verbose) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	436 int line_length = 70;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	437 tty->print_cr("%s %30s", " Length", "Number chains that length");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	438 for (i = 0; i < results_length; i++) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	439 if (results[i] > 0) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	440 tty->print("%4d", i);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	441 for (j = 0; (j < results[i]) && (j < line_length); j++) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	442 tty->print("%1s", "*");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	443 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	444 if (j == line_length) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	445 tty->print("%1s", "+");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	446 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	447 tty->cr();
0 a61af66fc99e Initial load duke parents: diff changeset	448 }
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	449 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	450 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	451 tty->print_cr(" %s %d: %d\n", "Number chains longer than",
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	452 results_length, out_of_range);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	453 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	454
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	455 void SymbolTable::print() {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	456 for (int i = 0; i < the_table()->table_size(); ++i) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	457 HashtableEntry<Symbol>* p = the_table()->bucket_addr(i);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	458 HashtableEntry<Symbol> entry = the_table()->bucket(i);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	459 if (entry != NULL) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	460 while (entry != NULL) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	461 tty->print(PTR_FORMAT " ", entry->literal());
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	462 entry->literal()->print();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	463 tty->print(" %d", entry->literal()->refcount());
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	464 p = entry->next_addr();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	465 entry = (HashtableEntry<Symbol>)HashtableEntry<Symbol>::make_ptr(p);
0 a61af66fc99e Initial load duke parents: diff changeset	466 }
a61af66fc99e Initial load duke parents: diff changeset	467 tty->cr();
a61af66fc99e Initial load duke parents: diff changeset	468 }
a61af66fc99e Initial load duke parents: diff changeset	469 }
a61af66fc99e Initial load duke parents: diff changeset	470 }
a61af66fc99e Initial load duke parents: diff changeset	471
a61af66fc99e Initial load duke parents: diff changeset	472 #endif // PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	473
a61af66fc99e Initial load duke parents: diff changeset	474 // --------------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	475
a61af66fc99e Initial load duke parents: diff changeset	476 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	477 class StableMemoryChecker : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	478 enum { _bufsize = wordSize*4 };
a61af66fc99e Initial load duke parents: diff changeset	479
a61af66fc99e Initial load duke parents: diff changeset	480 address _region;
a61af66fc99e Initial load duke parents: diff changeset	481 jint _size;
a61af66fc99e Initial load duke parents: diff changeset	482 u1 _save_buf[_bufsize];
a61af66fc99e Initial load duke parents: diff changeset	483
a61af66fc99e Initial load duke parents: diff changeset	484 int sample(u1* save_buf) {
a61af66fc99e Initial load duke parents: diff changeset	485 if (_size <= _bufsize) {
a61af66fc99e Initial load duke parents: diff changeset	486 memcpy(save_buf, _region, _size);
a61af66fc99e Initial load duke parents: diff changeset	487 return _size;
a61af66fc99e Initial load duke parents: diff changeset	488 } else {
a61af66fc99e Initial load duke parents: diff changeset	489 // copy head and tail
a61af66fc99e Initial load duke parents: diff changeset	490 memcpy(&save_buf[0], _region, _bufsize/2);
a61af66fc99e Initial load duke parents: diff changeset	491 memcpy(&save_buf[_bufsize/2], _region + _size - _bufsize/2, _bufsize/2);
a61af66fc99e Initial load duke parents: diff changeset	492 return (_bufsize/2)*2;
a61af66fc99e Initial load duke parents: diff changeset	493 }
a61af66fc99e Initial load duke parents: diff changeset	494 }
a61af66fc99e Initial load duke parents: diff changeset	495
a61af66fc99e Initial load duke parents: diff changeset	496 public:
a61af66fc99e Initial load duke parents: diff changeset	497 StableMemoryChecker(const void* region, jint size) {
a61af66fc99e Initial load duke parents: diff changeset	498 _region = (address) region;
a61af66fc99e Initial load duke parents: diff changeset	499 _size = size;
a61af66fc99e Initial load duke parents: diff changeset	500 sample(_save_buf);
a61af66fc99e Initial load duke parents: diff changeset	501 }
a61af66fc99e Initial load duke parents: diff changeset	502
a61af66fc99e Initial load duke parents: diff changeset	503 bool verify() {
a61af66fc99e Initial load duke parents: diff changeset	504 u1 check_buf[sizeof(_save_buf)];
a61af66fc99e Initial load duke parents: diff changeset	505 int check_size = sample(check_buf);
a61af66fc99e Initial load duke parents: diff changeset	506 return (0 == memcmp(_save_buf, check_buf, check_size));
a61af66fc99e Initial load duke parents: diff changeset	507 }
a61af66fc99e Initial load duke parents: diff changeset	508
a61af66fc99e Initial load duke parents: diff changeset	509 void set_region(const void* region) { _region = (address) region; }
a61af66fc99e Initial load duke parents: diff changeset	510 };
a61af66fc99e Initial load duke parents: diff changeset	511 #endif
a61af66fc99e Initial load duke parents: diff changeset	512
a61af66fc99e Initial load duke parents: diff changeset	513
a61af66fc99e Initial load duke parents: diff changeset	514 // --------------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	515 StringTable* StringTable::_the_table = NULL;
a61af66fc99e Initial load duke parents: diff changeset	516
a61af66fc99e Initial load duke parents: diff changeset	517 oop StringTable::lookup(int index, jchar* name,
a61af66fc99e Initial load duke parents: diff changeset	518 int len, unsigned int hash) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	519 for (HashtableEntry<oop>* l = bucket(index); l != NULL; l = l->next()) {
0 a61af66fc99e Initial load duke parents: diff changeset	520 if (l->hash() == hash) {
a61af66fc99e Initial load duke parents: diff changeset	521 if (java_lang_String::equals(l->literal(), name, len)) {
a61af66fc99e Initial load duke parents: diff changeset	522 return l->literal();
a61af66fc99e Initial load duke parents: diff changeset	523 }
a61af66fc99e Initial load duke parents: diff changeset	524 }
a61af66fc99e Initial load duke parents: diff changeset	525 }
a61af66fc99e Initial load duke parents: diff changeset	526 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	527 }
a61af66fc99e Initial load duke parents: diff changeset	528
a61af66fc99e Initial load duke parents: diff changeset	529
a61af66fc99e Initial load duke parents: diff changeset	530 oop StringTable::basic_add(int index, Handle string_or_null, jchar* name,
a61af66fc99e Initial load duke parents: diff changeset	531 int len, unsigned int hashValue, TRAPS) {
a61af66fc99e Initial load duke parents: diff changeset	532 debug_only(StableMemoryChecker smc(name, len * sizeof(name[0])));
a61af66fc99e Initial load duke parents: diff changeset	533 assert(!Universe::heap()->is_in_reserved(name) \|\| GC_locker::is_active(),
a61af66fc99e Initial load duke parents: diff changeset	534 "proposed name of symbol must be stable");
a61af66fc99e Initial load duke parents: diff changeset	535
a61af66fc99e Initial load duke parents: diff changeset	536 Handle string;
a61af66fc99e Initial load duke parents: diff changeset	537 // try to reuse the string if possible
2379 b099aaf51bf8 6962931: move interned strings out of the perm gen jcoomes parents: 2336 diff changeset	538 if (!string_or_null.is_null() && (!JavaObjectsInPerm \|\| string_or_null()->is_perm())) {
0 a61af66fc99e Initial load duke parents: diff changeset	539 string = string_or_null;
a61af66fc99e Initial load duke parents: diff changeset	540 } else {
a61af66fc99e Initial load duke parents: diff changeset	541 string = java_lang_String::create_tenured_from_unicode(name, len, CHECK_NULL);
a61af66fc99e Initial load duke parents: diff changeset	542 }
a61af66fc99e Initial load duke parents: diff changeset	543
a61af66fc99e Initial load duke parents: diff changeset	544 // Allocation must be done before grapping the SymbolTable_lock lock
a61af66fc99e Initial load duke parents: diff changeset	545 MutexLocker ml(StringTable_lock, THREAD);
a61af66fc99e Initial load duke parents: diff changeset	546
a61af66fc99e Initial load duke parents: diff changeset	547 assert(java_lang_String::equals(string(), name, len),
a61af66fc99e Initial load duke parents: diff changeset	548 "string must be properly initialized");
a61af66fc99e Initial load duke parents: diff changeset	549
a61af66fc99e Initial load duke parents: diff changeset	550 // Since look-up was done lock-free, we need to check if another
a61af66fc99e Initial load duke parents: diff changeset	551 // thread beat us in the race to insert the symbol.
a61af66fc99e Initial load duke parents: diff changeset	552
a61af66fc99e Initial load duke parents: diff changeset	553 oop test = lookup(index, name, len, hashValue); // calls lookup(u1*, int)
a61af66fc99e Initial load duke parents: diff changeset	554 if (test != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	555 // Entry already added
a61af66fc99e Initial load duke parents: diff changeset	556 return test;
a61af66fc99e Initial load duke parents: diff changeset	557 }
a61af66fc99e Initial load duke parents: diff changeset	558
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	559 HashtableEntry<oop>* entry = new_entry(hashValue, string());
0 a61af66fc99e Initial load duke parents: diff changeset	560 add_entry(index, entry);
a61af66fc99e Initial load duke parents: diff changeset	561 return string();
a61af66fc99e Initial load duke parents: diff changeset	562 }
a61af66fc99e Initial load duke parents: diff changeset	563
a61af66fc99e Initial load duke parents: diff changeset	564
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	565 oop StringTable::lookup(Symbol* symbol) {
0 a61af66fc99e Initial load duke parents: diff changeset	566 ResourceMark rm;
a61af66fc99e Initial load duke parents: diff changeset	567 int length;
a61af66fc99e Initial load duke parents: diff changeset	568 jchar* chars = symbol->as_unicode(length);
2418 352622fd140a 7032129: Native memory usage grow unexpectedly for vm/oom/InternedString tests never* parents: 2379 diff changeset	569 unsigned int hashValue = java_lang_String::hash_string(chars, length);
0 a61af66fc99e Initial load duke parents: diff changeset	570 int index = the_table()->hash_to_index(hashValue);
a61af66fc99e Initial load duke parents: diff changeset	571 return the_table()->lookup(index, chars, length, hashValue);
a61af66fc99e Initial load duke parents: diff changeset	572 }
a61af66fc99e Initial load duke parents: diff changeset	573
a61af66fc99e Initial load duke parents: diff changeset	574
a61af66fc99e Initial load duke parents: diff changeset	575 oop StringTable::intern(Handle string_or_null, jchar* name,
a61af66fc99e Initial load duke parents: diff changeset	576 int len, TRAPS) {
2418 352622fd140a 7032129: Native memory usage grow unexpectedly for vm/oom/InternedString tests never* parents: 2379 diff changeset	577 unsigned int hashValue = java_lang_String::hash_string(name, len);
0 a61af66fc99e Initial load duke parents: diff changeset	578 int index = the_table()->hash_to_index(hashValue);
a61af66fc99e Initial load duke parents: diff changeset	579 oop string = the_table()->lookup(index, name, len, hashValue);
a61af66fc99e Initial load duke parents: diff changeset	580
a61af66fc99e Initial load duke parents: diff changeset	581 // Found
a61af66fc99e Initial load duke parents: diff changeset	582 if (string != NULL) return string;
a61af66fc99e Initial load duke parents: diff changeset	583
a61af66fc99e Initial load duke parents: diff changeset	584 // Otherwise, add to symbol to table
a61af66fc99e Initial load duke parents: diff changeset	585 return the_table()->basic_add(index, string_or_null, name, len,
a61af66fc99e Initial load duke parents: diff changeset	586 hashValue, CHECK_NULL);
a61af66fc99e Initial load duke parents: diff changeset	587 }
a61af66fc99e Initial load duke parents: diff changeset	588
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	589 oop StringTable::intern(Symbol* symbol, TRAPS) {
0 a61af66fc99e Initial load duke parents: diff changeset	590 if (symbol == NULL) return NULL;
a61af66fc99e Initial load duke parents: diff changeset	591 ResourceMark rm(THREAD);
a61af66fc99e Initial load duke parents: diff changeset	592 int length;
a61af66fc99e Initial load duke parents: diff changeset	593 jchar* chars = symbol->as_unicode(length);
a61af66fc99e Initial load duke parents: diff changeset	594 Handle string;
a61af66fc99e Initial load duke parents: diff changeset	595 oop result = intern(string, chars, length, CHECK_NULL);
a61af66fc99e Initial load duke parents: diff changeset	596 return result;
a61af66fc99e Initial load duke parents: diff changeset	597 }
a61af66fc99e Initial load duke parents: diff changeset	598
a61af66fc99e Initial load duke parents: diff changeset	599
a61af66fc99e Initial load duke parents: diff changeset	600 oop StringTable::intern(oop string, TRAPS)
a61af66fc99e Initial load duke parents: diff changeset	601 {
a61af66fc99e Initial load duke parents: diff changeset	602 if (string == NULL) return NULL;
a61af66fc99e Initial load duke parents: diff changeset	603 ResourceMark rm(THREAD);
a61af66fc99e Initial load duke parents: diff changeset	604 int length;
a61af66fc99e Initial load duke parents: diff changeset	605 Handle h_string (THREAD, string);
a61af66fc99e Initial load duke parents: diff changeset	606 jchar* chars = java_lang_String::as_unicode_string(string, length);
a61af66fc99e Initial load duke parents: diff changeset	607 oop result = intern(h_string, chars, length, CHECK_NULL);
a61af66fc99e Initial load duke parents: diff changeset	608 return result;
a61af66fc99e Initial load duke parents: diff changeset	609 }
a61af66fc99e Initial load duke parents: diff changeset	610
a61af66fc99e Initial load duke parents: diff changeset	611
a61af66fc99e Initial load duke parents: diff changeset	612 oop StringTable::intern(const char* utf8_string, TRAPS) {
a61af66fc99e Initial load duke parents: diff changeset	613 if (utf8_string == NULL) return NULL;
a61af66fc99e Initial load duke parents: diff changeset	614 ResourceMark rm(THREAD);
a61af66fc99e Initial load duke parents: diff changeset	615 int length = UTF8::unicode_length(utf8_string);
a61af66fc99e Initial load duke parents: diff changeset	616 jchar* chars = NEW_RESOURCE_ARRAY(jchar, length);
a61af66fc99e Initial load duke parents: diff changeset	617 UTF8::convert_to_unicode(utf8_string, chars, length);
a61af66fc99e Initial load duke parents: diff changeset	618 Handle string;
a61af66fc99e Initial load duke parents: diff changeset	619 oop result = intern(string, chars, length, CHECK_NULL);
a61af66fc99e Initial load duke parents: diff changeset	620 return result;
a61af66fc99e Initial load duke parents: diff changeset	621 }
a61af66fc99e Initial load duke parents: diff changeset	622
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	623 void StringTable::unlink(BoolObjectClosure* is_alive) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	624 // Readers of the table are unlocked, so we should only be removing
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	625 // entries at a safepoint.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	626 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	627 for (int i = 0; i < the_table()->table_size(); ++i) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	628 for (HashtableEntry<oop>** p = the_table()->bucket_addr(i); *p != NULL; ) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	629 HashtableEntry<oop>* entry = *p;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	630 if (entry->is_shared()) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	631 break;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	632 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	633 assert(entry->literal() != NULL, "just checking");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	634 if (is_alive->do_object_b(entry->literal())) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	635 p = entry->next_addr();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	636 } else {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	637 *p = entry->next();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	638 the_table()->free_entry(entry);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	639 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	640 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	641 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	642 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	643
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	644 void StringTable::oops_do(OopClosure* f) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	645 for (int i = 0; i < the_table()->table_size(); ++i) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	646 HashtableEntry<oop>** p = the_table()->bucket_addr(i);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	647 HashtableEntry<oop>* entry = the_table()->bucket(i);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	648 while (entry != NULL) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	649 f->do_oop((oop*)entry->literal_addr());
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	650
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	651 // Did the closure remove the literal from the table?
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	652 if (entry->literal() == NULL) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	653 assert(!entry->is_shared(), "immutable hashtable entry?");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	654 *p = entry->next();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	655 the_table()->free_entry(entry);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	656 } else {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	657 p = entry->next_addr();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	658 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	659 entry = (HashtableEntry<oop>)HashtableEntry<oop>::make_ptr(p);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	660 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	661 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	662 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	663
0 a61af66fc99e Initial load duke parents: diff changeset	664 void StringTable::verify() {
a61af66fc99e Initial load duke parents: diff changeset	665 for (int i = 0; i < the_table()->table_size(); ++i) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	666 HashtableEntry<oop>* p = the_table()->bucket(i);
0 a61af66fc99e Initial load duke parents: diff changeset	667 for ( ; p != NULL; p = p->next()) {
a61af66fc99e Initial load duke parents: diff changeset	668 oop s = p->literal();
a61af66fc99e Initial load duke parents: diff changeset	669 guarantee(s != NULL, "interned string is NULL");
2379 b099aaf51bf8 6962931: move interned strings out of the perm gen jcoomes parents: 2336 diff changeset	670 guarantee(s->is_perm() \|\| !JavaObjectsInPerm, "interned string not in permspace");
2418 352622fd140a 7032129: Native memory usage grow unexpectedly for vm/oom/InternedString tests never* parents: 2379 diff changeset	671 unsigned int h = java_lang_String::hash_string(s);
0 a61af66fc99e Initial load duke parents: diff changeset	672 guarantee(p->hash() == h, "broken hash in string table entry");
a61af66fc99e Initial load duke parents: diff changeset	673 guarantee(the_table()->hash_to_index(h) == i,
a61af66fc99e Initial load duke parents: diff changeset	674 "wrong index in string table");
a61af66fc99e Initial load duke parents: diff changeset	675 }
a61af66fc99e Initial load duke parents: diff changeset	676 }
a61af66fc99e Initial load duke parents: diff changeset	677 }

Mercurial > hg > truffle

annotate src/share/vm/classfile/symbolTable.cpp @ 6086:cdd249497b34