graal-compiler: src/share/vm/classfile/symbolTable.hpp annotate

annotate src/share/vm/classfile/symbolTable.hpp @ 5979:fc9d8850ab8b

7150058: Allocate symbols from null boot loader to an arena for NMT Summary: Move symbol allocation to an arena so NMT doesn't have to track them at startup. Reviewed-by: never, kamg, zgu

author	coleenp
date	Fri, 23 Mar 2012 11:16:05 -0400
parents	94ec88ca68e2
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 #ifndef SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	26 #define SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	27
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	28 #include "memory/allocation.inline.hpp"
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	29 #include "oops/symbol.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	30 #include "utilities/hashtable.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	31
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	32 // The symbol table holds all Symbol*s and corresponding interned strings.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	33 // Symbol*s and literal strings should be canonicalized.
0 a61af66fc99e Initial load duke parents: diff changeset	34 //
a61af66fc99e Initial load duke parents: diff changeset	35 // The interned strings are created lazily.
a61af66fc99e Initial load duke parents: diff changeset	36 //
a61af66fc99e Initial load duke parents: diff changeset	37 // It is implemented as an open hash table with a fixed number of buckets.
a61af66fc99e Initial load duke parents: diff changeset	38 //
a61af66fc99e Initial load duke parents: diff changeset	39 // %note:
a61af66fc99e Initial load duke parents: diff changeset	40 // - symbolTableEntrys are allocated in blocks to reduce the space overhead.
a61af66fc99e Initial load duke parents: diff changeset	41
a61af66fc99e Initial load duke parents: diff changeset	42 class BoolObjectClosure;
a61af66fc99e Initial load duke parents: diff changeset	43
a61af66fc99e Initial load duke parents: diff changeset	44
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	45 // Class to hold a newly created or referenced Symbol* temporarily in scope.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	46 // new_symbol() and lookup() will create a Symbol* if not already in the
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	47 // symbol table and add to the symbol's reference count.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	48 // probe() and lookup_only() will increment the refcount if symbol is found.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	49 class TempNewSymbol : public StackObj {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	50 Symbol* _temp;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	51
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	52 public:
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	53 TempNewSymbol() : _temp(NULL) {}
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	54 // Creating or looking up a symbol increments the symbol's reference count
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	55 TempNewSymbol(Symbol *s) : _temp(s) {}
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	56
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	57 // Operator= increments reference count.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	58 void operator=(const TempNewSymbol &s) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	59 _temp = s._temp;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	60 if (_temp !=NULL) _temp->increment_refcount();
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
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	63 // Decrement reference counter so it can go away if it's unique
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	64 ~TempNewSymbol() { if (_temp != NULL) _temp->decrement_refcount(); }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	65
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	66 // Operators so they can be used like Symbols
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	67 Symbol* operator -> () const { return _temp; }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	68 bool operator == (Symbol* o) const { return _temp == o; }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	69 // Sneaky conversion function
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	70 operator Symbol*() { return _temp; }
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
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	73 class SymbolTable : public Hashtable<Symbol*> {
0 a61af66fc99e Initial load duke parents: diff changeset	74 friend class VMStructs;
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	75 friend class ClassFileParser;
0 a61af66fc99e Initial load duke parents: diff changeset	76
a61af66fc99e Initial load duke parents: diff changeset	77 private:
a61af66fc99e Initial load duke parents: diff changeset	78 // The symbol table
a61af66fc99e Initial load duke parents: diff changeset	79 static SymbolTable* _the_table;
a61af66fc99e Initial load duke parents: diff changeset	80
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	81 // For statistics
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	82 static int symbols_removed;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	83 static int symbols_counted;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	84
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	85 Symbol* allocate_symbol(const u1* name, int len, bool c_heap, TRAPS); // Assumes no characters larger than 0x7F
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	86
0 a61af66fc99e Initial load duke parents: diff changeset	87 // Adding elements
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	88 Symbol* basic_add(int index, u1* name, int len, unsigned int hashValue,
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	89 bool c_heap, TRAPS);
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	90
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	91 bool basic_add(Handle class_loader, constantPoolHandle cp, int names_count,
0 a61af66fc99e Initial load duke parents: diff changeset	92 const char** names, int* lengths, int* cp_indices,
a61af66fc99e Initial load duke parents: diff changeset	93 unsigned int* hashValues, TRAPS);
a61af66fc99e Initial load duke parents: diff changeset	94
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	95 static void new_symbols(Handle class_loader, constantPoolHandle cp,
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	96 int names_count,
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	97 const char** name, int* lengths,
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	98 int* cp_indices, unsigned int* hashValues,
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	99 TRAPS) {
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	100 add(class_loader, cp, names_count, name, lengths, cp_indices, hashValues, THREAD);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	101 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	102
0 a61af66fc99e Initial load duke parents: diff changeset	103 // Table size
a61af66fc99e Initial load duke parents: diff changeset	104 enum {
a61af66fc99e Initial load duke parents: diff changeset	105 symbol_table_size = 20011
a61af66fc99e Initial load duke parents: diff changeset	106 };
a61af66fc99e Initial load duke parents: diff changeset	107
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	108 Symbol* lookup(int index, const char* name, int len, unsigned int hash);
0 a61af66fc99e Initial load duke parents: diff changeset	109
a61af66fc99e Initial load duke parents: diff changeset	110 SymbolTable()
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	111 : Hashtable<Symbol>(symbol_table_size, sizeof (HashtableEntry<Symbol>)) {}
0 a61af66fc99e Initial load duke parents: diff changeset	112
a61af66fc99e Initial load duke parents: diff changeset	113 SymbolTable(HashtableBucket* t, int number_of_entries)
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	114 : Hashtable<Symbol>(symbol_table_size, sizeof (HashtableEntry<Symbol>), t,
0 a61af66fc99e Initial load duke parents: diff changeset	115 number_of_entries) {}
a61af66fc99e Initial load duke parents: diff changeset	116
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	117 // Arena for permanent symbols (null class loader) that are never unloaded
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	118 static Arena* _arena;
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	119 static Arena* arena() { return _arena; } // called for statistics
0 a61af66fc99e Initial load duke parents: diff changeset	120
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	121 static void initialize_symbols(int arena_alloc_size = 0);
0 a61af66fc99e Initial load duke parents: diff changeset	122 public:
a61af66fc99e Initial load duke parents: diff changeset	123 enum {
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	124 symbol_alloc_batch_size = 8,
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	125 // Pick initial size based on java -version size measurements
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	126 symbol_alloc_arena_size = 360*K
0 a61af66fc99e Initial load duke parents: diff changeset	127 };
a61af66fc99e Initial load duke parents: diff changeset	128
a61af66fc99e Initial load duke parents: diff changeset	129 // The symbol table
a61af66fc99e Initial load duke parents: diff changeset	130 static SymbolTable* the_table() { return _the_table; }
a61af66fc99e Initial load duke parents: diff changeset	131
a61af66fc99e Initial load duke parents: diff changeset	132 static void create_table() {
a61af66fc99e Initial load duke parents: diff changeset	133 assert(_the_table == NULL, "One symbol table allowed.");
a61af66fc99e Initial load duke parents: diff changeset	134 _the_table = new SymbolTable();
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	135 initialize_symbols(symbol_alloc_arena_size);
0 a61af66fc99e Initial load duke parents: diff changeset	136 }
a61af66fc99e Initial load duke parents: diff changeset	137
a61af66fc99e Initial load duke parents: diff changeset	138 static void create_table(HashtableBucket* t, int length,
a61af66fc99e Initial load duke parents: diff changeset	139 int number_of_entries) {
a61af66fc99e Initial load duke parents: diff changeset	140 assert(_the_table == NULL, "One symbol table allowed.");
a61af66fc99e Initial load duke parents: diff changeset	141 assert(length == symbol_table_size * sizeof(HashtableBucket),
a61af66fc99e Initial load duke parents: diff changeset	142 "bad shared symbol size.");
a61af66fc99e Initial load duke parents: diff changeset	143 _the_table = new SymbolTable(t, number_of_entries);
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	144 // if CDS give symbol table a default arena size since most symbols
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	145 // are already allocated in the shared misc section.
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	146 initialize_symbols();
0 a61af66fc99e Initial load duke parents: diff changeset	147 }
a61af66fc99e Initial load duke parents: diff changeset	148
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	149 static Symbol* lookup(const char* name, int len, TRAPS);
0 a61af66fc99e Initial load duke parents: diff changeset	150 // lookup only, won't add. Also calculate hash.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	151 static Symbol* lookup_only(const char* name, int len, unsigned int& hash);
0 a61af66fc99e Initial load duke parents: diff changeset	152 // Only copy to C string to be added if lookup failed.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	153 static Symbol* lookup(const Symbol* sym, int begin, int end, TRAPS);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	154
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	155 static void release(Symbol* sym);
0 a61af66fc99e Initial load duke parents: diff changeset	156
4800 94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	157 // 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	158 static Symbol** lookup_symbol_addr(Symbol* sym);
94ec88ca68e2 7115199: Add event tracing hooks and Java Flight Recorder infrastructure phh parents: 2418 diff changeset	159
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	160 // jchar (utf16) version of lookups
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	161 static Symbol* lookup_unicode(const jchar* name, int len, TRAPS);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	162 static Symbol* lookup_only_unicode(const jchar* name, int len, unsigned int& hash);
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	163
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	164 static void add(Handle class_loader, constantPoolHandle cp, int names_count,
0 a61af66fc99e Initial load duke parents: diff changeset	165 const char** names, int* lengths, int* cp_indices,
a61af66fc99e Initial load duke parents: diff changeset	166 unsigned int* hashValues, TRAPS);
a61af66fc99e Initial load duke parents: diff changeset	167
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	168 // Release any dead symbols
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	169 static void unlink();
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	170
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	171 // iterate over symbols
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	172 static void symbols_do(SymbolClosure *cl);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	173
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	174 // Symbol creation
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	175 static Symbol* new_symbol(const char* utf8_buffer, int length, TRAPS) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	176 assert(utf8_buffer != NULL, "just checking");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	177 return lookup(utf8_buffer, length, THREAD);
0 a61af66fc99e Initial load duke parents: diff changeset	178 }
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	179 static Symbol* new_symbol(const char* name, TRAPS) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	180 return new_symbol(name, (int)strlen(name), THREAD);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	181 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	182 static Symbol* new_symbol(const Symbol* sym, int begin, int end, TRAPS) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	183 assert(begin <= end && end <= sym->utf8_length(), "just checking");
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	184 return lookup(sym, begin, end, THREAD);
0 a61af66fc99e Initial load duke parents: diff changeset	185 }
a61af66fc99e Initial load duke parents: diff changeset	186
5979 fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	187 // Create a symbol in the arena for symbols that are not deleted
fc9d8850ab8b 7150058: Allocate symbols from null boot loader to an arena for NMT coleenp parents: 4800 diff changeset	188 static Symbol* 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	189
0 a61af66fc99e Initial load duke parents: diff changeset	190 // Symbol lookup
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	191 static Symbol* lookup(int index, const char* name, int len, TRAPS);
0 a61af66fc99e Initial load duke parents: diff changeset	192
a61af66fc99e Initial load duke parents: diff changeset	193 // Needed for preloading classes in signatures when compiling.
a61af66fc99e Initial load duke parents: diff changeset	194 // Returns the symbol is already present in symbol table, otherwise
a61af66fc99e Initial load duke parents: diff changeset	195 // NULL. NO ALLOCATION IS GUARANTEED!
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	196 static Symbol* probe(const char* name, int len) {
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	197 unsigned int ignore_hash;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	198 return lookup_only(name, len, ignore_hash);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	199 }
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	200 static Symbol* probe_unicode(const jchar* name, int len) {
665 c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	201 unsigned int ignore_hash;
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	202 return lookup_only_unicode(name, len, ignore_hash);
c89f86385056 6814659: separable cleanups and subroutines for 6655638 jrose parents: 0 diff changeset	203 }
0 a61af66fc99e Initial load duke parents: diff changeset	204
a61af66fc99e Initial load duke parents: diff changeset	205 // Histogram
a61af66fc99e Initial load duke parents: diff changeset	206 static void print_histogram() PRODUCT_RETURN;
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	207 static void print() PRODUCT_RETURN;
0 a61af66fc99e Initial load duke parents: diff changeset	208
a61af66fc99e Initial load duke parents: diff changeset	209 // Debugging
a61af66fc99e Initial load duke parents: diff changeset	210 static void verify();
a61af66fc99e Initial load duke parents: diff changeset	211
a61af66fc99e Initial load duke parents: diff changeset	212 // Sharing
a61af66fc99e Initial load duke parents: diff changeset	213 static void copy_buckets(char** top, char*end) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	214 the_table()->Hashtable<Symbol*>::copy_buckets(top, end);
0 a61af66fc99e Initial load duke parents: diff changeset	215 }
a61af66fc99e Initial load duke parents: diff changeset	216 static void copy_table(char** top, char*end) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	217 the_table()->Hashtable<Symbol*>::copy_table(top, end);
0 a61af66fc99e Initial load duke parents: diff changeset	218 }
a61af66fc99e Initial load duke parents: diff changeset	219 static void reverse(void* boundary = NULL) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	220 the_table()->Hashtable<Symbol*>::reverse(boundary);
0 a61af66fc99e Initial load duke parents: diff changeset	221 }
a61af66fc99e Initial load duke parents: diff changeset	222 };
a61af66fc99e Initial load duke parents: diff changeset	223
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	224 class StringTable : public Hashtable<oop> {
0 a61af66fc99e Initial load duke parents: diff changeset	225 friend class VMStructs;
a61af66fc99e Initial load duke parents: diff changeset	226
a61af66fc99e Initial load duke parents: diff changeset	227 private:
a61af66fc99e Initial load duke parents: diff changeset	228 // The string table
a61af66fc99e Initial load duke parents: diff changeset	229 static StringTable* _the_table;
a61af66fc99e Initial load duke parents: diff changeset	230
a61af66fc99e Initial load duke parents: diff changeset	231 static oop intern(Handle string_or_null, jchar* chars, int length, TRAPS);
a61af66fc99e Initial load duke parents: diff changeset	232 oop basic_add(int index, Handle string_or_null, jchar* name, int len,
a61af66fc99e Initial load duke parents: diff changeset	233 unsigned int hashValue, TRAPS);
a61af66fc99e Initial load duke parents: diff changeset	234
a61af66fc99e Initial load duke parents: diff changeset	235 oop lookup(int index, jchar* chars, int length, unsigned int hashValue);
a61af66fc99e Initial load duke parents: diff changeset	236
2378 924777755fad 6962930: make the string table size configurable jcoomes parents: 2177 diff changeset	237 StringTable() : Hashtable<oop>((int)StringTableSize,
924777755fad 6962930: make the string table size configurable jcoomes parents: 2177 diff changeset	238 sizeof (HashtableEntry<oop>)) {}
0 a61af66fc99e Initial load duke parents: diff changeset	239
a61af66fc99e Initial load duke parents: diff changeset	240 StringTable(HashtableBucket* t, int number_of_entries)
2378 924777755fad 6962930: make the string table size configurable jcoomes parents: 2177 diff changeset	241 : Hashtable<oop>((int)StringTableSize, sizeof (HashtableEntry<oop>), t,
924777755fad 6962930: make the string table size configurable jcoomes parents: 2177 diff changeset	242 number_of_entries) {}
0 a61af66fc99e Initial load duke parents: diff changeset	243
a61af66fc99e Initial load duke parents: diff changeset	244 public:
a61af66fc99e Initial load duke parents: diff changeset	245 // The string table
a61af66fc99e Initial load duke parents: diff changeset	246 static StringTable* the_table() { return _the_table; }
a61af66fc99e Initial load duke parents: diff changeset	247
a61af66fc99e Initial load duke parents: diff changeset	248 static void create_table() {
a61af66fc99e Initial load duke parents: diff changeset	249 assert(_the_table == NULL, "One string table allowed.");
a61af66fc99e Initial load duke parents: diff changeset	250 _the_table = new StringTable();
a61af66fc99e Initial load duke parents: diff changeset	251 }
a61af66fc99e Initial load duke parents: diff changeset	252
a61af66fc99e Initial load duke parents: diff changeset	253 static void create_table(HashtableBucket* t, int length,
a61af66fc99e Initial load duke parents: diff changeset	254 int number_of_entries) {
a61af66fc99e Initial load duke parents: diff changeset	255 assert(_the_table == NULL, "One string table allowed.");
2378 924777755fad 6962930: make the string table size configurable jcoomes parents: 2177 diff changeset	256 assert((size_t)length == StringTableSize * sizeof(HashtableBucket),
0 a61af66fc99e Initial load duke parents: diff changeset	257 "bad shared string size.");
a61af66fc99e Initial load duke parents: diff changeset	258 _the_table = new StringTable(t, number_of_entries);
a61af66fc99e Initial load duke parents: diff changeset	259 }
a61af66fc99e Initial load duke parents: diff changeset	260
a61af66fc99e Initial load duke parents: diff changeset	261 // GC support
a61af66fc99e Initial load duke parents: diff changeset	262 // Delete pointers to otherwise-unreachable objects.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	263 static void unlink(BoolObjectClosure* cl);
0 a61af66fc99e Initial load duke parents: diff changeset	264
a61af66fc99e Initial load duke parents: diff changeset	265 // Invoke "f->do_oop" on the locations of all oops in the table.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	266 static void oops_do(OopClosure* f);
0 a61af66fc99e Initial load duke parents: diff changeset	267
a61af66fc99e Initial load duke parents: diff changeset	268 // Probing
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	269 static oop lookup(Symbol* symbol);
0 a61af66fc99e Initial load duke parents: diff changeset	270
a61af66fc99e Initial load duke parents: diff changeset	271 // Interning
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	272 static oop intern(Symbol* symbol, TRAPS);
0 a61af66fc99e Initial load duke parents: diff changeset	273 static oop intern(oop string, TRAPS);
a61af66fc99e Initial load duke parents: diff changeset	274 static oop intern(const char *utf8_string, TRAPS);
a61af66fc99e Initial load duke parents: diff changeset	275
a61af66fc99e Initial load duke parents: diff changeset	276 // Debugging
a61af66fc99e Initial load duke parents: diff changeset	277 static void verify();
a61af66fc99e Initial load duke parents: diff changeset	278
a61af66fc99e Initial load duke parents: diff changeset	279 // Sharing
a61af66fc99e Initial load duke parents: diff changeset	280 static void copy_buckets(char** top, char*end) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	281 the_table()->Hashtable<oop>::copy_buckets(top, end);
0 a61af66fc99e Initial load duke parents: diff changeset	282 }
a61af66fc99e Initial load duke parents: diff changeset	283 static void copy_table(char** top, char*end) {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	284 the_table()->Hashtable<oop>::copy_table(top, end);
0 a61af66fc99e Initial load duke parents: diff changeset	285 }
a61af66fc99e Initial load duke parents: diff changeset	286 static void reverse() {
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	287 the_table()->Hashtable<oop>::reverse();
0 a61af66fc99e Initial load duke parents: diff changeset	288 }
a61af66fc99e Initial load duke parents: diff changeset	289 };
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	290
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	291 #endif // SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP

Mercurial > hg > graal-compiler

annotate src/share/vm/classfile/symbolTable.hpp @ 5979:fc9d8850ab8b