J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 1 | /* |
Goetz Lindenmaier | b26df6b | 2016-01-04 15:41:05 +0100 | [diff] [blame] | 2 | * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
Erik Trimble | ba7c173 | 2010-05-27 19:08:38 -0700 | [diff] [blame] | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 22 | * |
| 23 | */ |
| 24 | |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 25 | #ifndef SHARE_VM_OOPS_CONSTANTPOOLOOP_HPP |
| 26 | #define SHARE_VM_OOPS_CONSTANTPOOLOOP_HPP |
| 27 | |
| 28 | #include "oops/arrayOop.hpp" |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 29 | #include "oops/cpCache.hpp" |
| 30 | #include "oops/objArrayOop.hpp" |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 31 | #include "oops/symbol.hpp" |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 32 | #include "oops/typeArrayOop.hpp" |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 33 | #include "runtime/handles.hpp" |
Goetz Lindenmaier | 25f33c0 | 2014-07-04 11:46:01 +0200 | [diff] [blame] | 34 | #include "utilities/bytes.hpp" |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 35 | #include "utilities/constantTag.hpp" |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 36 | |
Coleen Phillimore | 472622d | 2014-03-26 21:47:45 -0400 | [diff] [blame] | 37 | // A ConstantPool is an array containing class constants as described in the |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 38 | // class file. |
| 39 | // |
| 40 | // Most of the constant pool entries are written during class parsing, which |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 41 | // is safe. For klass types, the constant pool entry is |
| 42 | // modified when the entry is resolved. If a klass constant pool |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 43 | // entry is read without a lock, only the resolved state guarantees that |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 44 | // the entry in the constant pool is a klass object and not a Symbol*. |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 45 | |
| 46 | class SymbolHashMap; |
| 47 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 48 | class CPSlot VALUE_OBJ_CLASS_SPEC { |
| 49 | intptr_t _ptr; |
| 50 | public: |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 51 | enum TagBits { _resolved_value = 0, _symbol_bit = 1, _pseudo_bit = 2, _symbol_mask = 3 }; |
| 52 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 53 | CPSlot(intptr_t ptr): _ptr(ptr) {} |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 54 | CPSlot(Klass* ptr): _ptr((intptr_t)ptr) {} |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 55 | CPSlot(Symbol* ptr): _ptr((intptr_t)ptr | _symbol_bit) {} |
| 56 | CPSlot(Symbol* ptr, int tag_bits): _ptr((intptr_t)ptr | tag_bits) {} |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 57 | |
| 58 | intptr_t value() { return _ptr; } |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 59 | bool is_resolved() { return (_ptr & _symbol_bit ) == _resolved_value; } |
| 60 | bool is_unresolved() { return (_ptr & _symbol_bit ) != _resolved_value; } |
| 61 | bool is_pseudo_string() { return (_ptr & _symbol_mask) == _symbol_bit + _pseudo_bit; } |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 62 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 63 | Symbol* get_symbol() { |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 64 | assert(is_unresolved(), "bad call"); |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 65 | return (Symbol*)(_ptr & ~_symbol_mask); |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 66 | } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 67 | Klass* get_klass() { |
| 68 | assert(is_resolved(), "bad call"); |
| 69 | return (Klass*)_ptr; |
| 70 | } |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 71 | }; |
| 72 | |
Ioi Lam | 93b845e | 2013-01-25 15:06:18 -0500 | [diff] [blame] | 73 | class KlassSizeStats; |
Coleen Phillimore | 472622d | 2014-03-26 21:47:45 -0400 | [diff] [blame] | 74 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 75 | class ConstantPool : public Metadata { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 76 | friend class VMStructs; |
Christian Thalinger | bf5db72 | 2015-12-14 17:02:02 -1000 | [diff] [blame] | 77 | friend class JVMCIVMStructs; |
Coleen Phillimore | 472622d | 2014-03-26 21:47:45 -0400 | [diff] [blame] | 78 | friend class BytecodeInterpreter; // Directly extracts a klass in the pool for fast instanceof/checkcast |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 79 | friend class Universe; // For null constructor |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 80 | private: |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 81 | Array<u1>* _tags; // the tag array describing the constant pool's contents |
Harold Seigel | 7fee66f | 2012-11-06 15:09:37 -0500 | [diff] [blame] | 82 | ConstantPoolCache* _cache; // the cache holding interpreter runtime information |
| 83 | InstanceKlass* _pool_holder; // the corresponding class |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 84 | Array<u2>* _operands; // for variable-sized (InvokeDynamic) nodes, usually empty |
| 85 | |
| 86 | // Array of resolved objects from the constant pool and map from resolved |
| 87 | // object index to original constant pool index |
| 88 | jobject _resolved_references; |
| 89 | Array<u2>* _reference_map; |
| 90 | |
Coleen Phillimore | 9903956 | 2013-01-23 10:34:29 -0500 | [diff] [blame] | 91 | enum { |
Coleen Phillimore | b8b9434 | 2013-02-22 08:36:42 -0500 | [diff] [blame] | 92 | _has_preresolution = 1, // Flags |
| 93 | _on_stack = 2 |
Coleen Phillimore | 9903956 | 2013-01-23 10:34:29 -0500 | [diff] [blame] | 94 | }; |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 95 | |
Coleen Phillimore | 9903956 | 2013-01-23 10:34:29 -0500 | [diff] [blame] | 96 | int _flags; // old fashioned bit twiddling |
| 97 | int _length; // number of elements in the array |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 98 | |
| 99 | union { |
| 100 | // set for CDS to restore resolved references |
| 101 | int _resolved_reference_length; |
Coleen Phillimore | e508ba9 | 2013-01-17 13:40:31 -0500 | [diff] [blame] | 102 | // keeps version number for redefined classes (used in backtrace) |
| 103 | int _version; |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 104 | } _saved; |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 105 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 106 | void set_tags(Array<u1>* tags) { _tags = tags; } |
| 107 | void tag_at_put(int which, jbyte t) { tags()->at_put(which, t); } |
| 108 | void release_tag_at_put(int which, jbyte t) { tags()->release_at_put(which, t); } |
| 109 | |
Coleen Phillimore | 243d697 | 2014-06-19 11:16:10 -0400 | [diff] [blame] | 110 | u1* tag_addr_at(int which) const { return tags()->adr_at(which); } |
| 111 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 112 | void set_operands(Array<u2>* operands) { _operands = operands; } |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 113 | |
Coleen Phillimore | 9903956 | 2013-01-23 10:34:29 -0500 | [diff] [blame] | 114 | int flags() const { return _flags; } |
| 115 | void set_flags(int f) { _flags = f; } |
John R Rose | 849e0ff | 2008-11-12 22:33:26 -0800 | [diff] [blame] | 116 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 117 | private: |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 118 | intptr_t* base() const { return (intptr_t*) (((char*) this) + sizeof(ConstantPool)); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 119 | |
Markus Grönlund | 2ad9d31 | 2015-12-08 20:04:03 +0100 | [diff] [blame] | 120 | CPSlot slot_at(int which) const { |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 121 | assert(is_within_bounds(which), "index out of bounds"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 122 | // Uses volatile because the klass slot changes without a lock. |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 123 | volatile intptr_t adr = (intptr_t)OrderAccess::load_ptr_acquire(obj_at_addr_raw(which)); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 124 | assert(adr != 0 || which == 0, "cp entry for klass should not be zero"); |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 125 | return CPSlot(adr); |
| 126 | } |
| 127 | |
| 128 | void slot_at_put(int which, CPSlot s) const { |
| 129 | assert(is_within_bounds(which), "index out of bounds"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 130 | assert(s.value() != 0, "Caught something"); |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 131 | *(intptr_t*)&base()[which] = s.value(); |
| 132 | } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 133 | intptr_t* obj_at_addr_raw(int which) const { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 134 | assert(is_within_bounds(which), "index out of bounds"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 135 | return (intptr_t*) &base()[which]; |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 136 | } |
| 137 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 138 | jint* int_at_addr(int which) const { |
| 139 | assert(is_within_bounds(which), "index out of bounds"); |
| 140 | return (jint*) &base()[which]; |
| 141 | } |
| 142 | |
| 143 | jlong* long_at_addr(int which) const { |
| 144 | assert(is_within_bounds(which), "index out of bounds"); |
| 145 | return (jlong*) &base()[which]; |
| 146 | } |
| 147 | |
| 148 | jfloat* float_at_addr(int which) const { |
| 149 | assert(is_within_bounds(which), "index out of bounds"); |
| 150 | return (jfloat*) &base()[which]; |
| 151 | } |
| 152 | |
| 153 | jdouble* double_at_addr(int which) const { |
| 154 | assert(is_within_bounds(which), "index out of bounds"); |
| 155 | return (jdouble*) &base()[which]; |
| 156 | } |
| 157 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 158 | ConstantPool(Array<u1>* tags); |
| 159 | ConstantPool() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 160 | public: |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 161 | static ConstantPool* allocate(ClassLoaderData* loader_data, int length, TRAPS); |
| 162 | |
| 163 | bool is_constantPool() const volatile { return true; } |
| 164 | |
| 165 | Array<u1>* tags() const { return _tags; } |
| 166 | Array<u2>* operands() const { return _operands; } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 167 | |
Coleen Phillimore | 9903956 | 2013-01-23 10:34:29 -0500 | [diff] [blame] | 168 | bool has_preresolution() const { return (_flags & _has_preresolution) != 0; } |
| 169 | void set_has_preresolution() { _flags |= _has_preresolution; } |
John R Rose | 849e0ff | 2008-11-12 22:33:26 -0800 | [diff] [blame] | 170 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 171 | // Redefine classes support. If a method refering to this constant pool |
| 172 | // is on the executing stack, or as a handle in vm code, this constant pool |
| 173 | // can't be removed from the set of previous versions saved in the instance |
| 174 | // class. |
Coleen Phillimore | 9903956 | 2013-01-23 10:34:29 -0500 | [diff] [blame] | 175 | bool on_stack() const { return (_flags &_on_stack) != 0; } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 176 | void set_on_stack(const bool value); |
| 177 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 178 | // Klass holding pool |
Harold Seigel | 7fee66f | 2012-11-06 15:09:37 -0500 | [diff] [blame] | 179 | InstanceKlass* pool_holder() const { return _pool_holder; } |
| 180 | void set_pool_holder(InstanceKlass* k) { _pool_holder = k; } |
| 181 | InstanceKlass** pool_holder_addr() { return &_pool_holder; } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 182 | |
| 183 | // Interpreter runtime support |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 184 | ConstantPoolCache* cache() const { return _cache; } |
| 185 | void set_cache(ConstantPoolCache* cache){ _cache = cache; } |
| 186 | |
| 187 | // Create object cache in the constant pool |
| 188 | void initialize_resolved_references(ClassLoaderData* loader_data, |
Mikael Gerdin | d281188 | 2015-10-26 17:13:40 -0400 | [diff] [blame] | 189 | const intStack& reference_map, |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 190 | int constant_pool_map_length, |
| 191 | TRAPS); |
| 192 | |
| 193 | // resolved strings, methodHandles and callsite objects from the constant pool |
| 194 | objArrayOop resolved_references() const; |
| 195 | // mapping resolved object array indexes to cp indexes and back. |
| 196 | int object_to_cp_index(int index) { return _reference_map->at(index); } |
| 197 | int cp_to_object_index(int index); |
| 198 | |
| 199 | // Invokedynamic indexes. |
| 200 | // They must look completely different from normal indexes. |
| 201 | // The main reason is that byte swapping is sometimes done on normal indexes. |
| 202 | // Finally, it is helpful for debugging to tell the two apart. |
| 203 | static bool is_invokedynamic_index(int i) { return (i < 0); } |
| 204 | static int decode_invokedynamic_index(int i) { assert(is_invokedynamic_index(i), ""); return ~i; } |
| 205 | static int encode_invokedynamic_index(int i) { assert(!is_invokedynamic_index(i), ""); return ~i; } |
| 206 | |
| 207 | |
| 208 | // The invokedynamic points at a CP cache entry. This entry points back |
| 209 | // at the original CP entry (CONSTANT_InvokeDynamic) and also (via f2) at an entry |
| 210 | // in the resolved_references array (which provides the appendix argument). |
| 211 | int invokedynamic_cp_cache_index(int index) const { |
| 212 | assert (is_invokedynamic_index(index), "should be a invokedynamic index"); |
| 213 | int cache_index = decode_invokedynamic_index(index); |
| 214 | return cache_index; |
| 215 | } |
| 216 | ConstantPoolCacheEntry* invokedynamic_cp_cache_entry_at(int index) const { |
| 217 | // decode index that invokedynamic points to. |
| 218 | int cp_cache_index = invokedynamic_cp_cache_index(index); |
| 219 | return cache()->entry_at(cp_cache_index); |
| 220 | } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 221 | |
| 222 | // Assembly code support |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 223 | static int tags_offset_in_bytes() { return offset_of(ConstantPool, _tags); } |
| 224 | static int cache_offset_in_bytes() { return offset_of(ConstantPool, _cache); } |
| 225 | static int pool_holder_offset_in_bytes() { return offset_of(ConstantPool, _pool_holder); } |
| 226 | static int resolved_references_offset_in_bytes() { return offset_of(ConstantPool, _resolved_references); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 227 | |
| 228 | // Storing constants |
| 229 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 230 | void klass_at_put(int which, Klass* k) { |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 231 | assert(k != NULL, "resolved class shouldn't be null"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 232 | assert(is_within_bounds(which), "index out of bounds"); |
| 233 | OrderAccess::release_store_ptr((Klass* volatile *)obj_at_addr_raw(which), k); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 234 | // The interpreter assumes when the tag is stored, the klass is resolved |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 235 | // and the Klass* is a klass rather than a Symbol*, so we need |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 236 | // hardware store ordering here. |
| 237 | release_tag_at_put(which, JVM_CONSTANT_Class); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | // For temporary use while constructing constant pool |
| 241 | void klass_index_at_put(int which, int name_index) { |
| 242 | tag_at_put(which, JVM_CONSTANT_ClassIndex); |
| 243 | *int_at_addr(which) = name_index; |
| 244 | } |
| 245 | |
| 246 | // Temporary until actual use |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 247 | void unresolved_klass_at_put(int which, Symbol* s) { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 248 | release_tag_at_put(which, JVM_CONSTANT_UnresolvedClass); |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 249 | slot_at_put(which, s); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 250 | } |
| 251 | |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 252 | void method_handle_index_at_put(int which, int ref_kind, int ref_index) { |
| 253 | tag_at_put(which, JVM_CONSTANT_MethodHandle); |
| 254 | *int_at_addr(which) = ((jint) ref_index<<16) | ref_kind; |
| 255 | } |
| 256 | |
| 257 | void method_type_index_at_put(int which, int ref_index) { |
| 258 | tag_at_put(which, JVM_CONSTANT_MethodType); |
| 259 | *int_at_addr(which) = ref_index; |
| 260 | } |
| 261 | |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 262 | void invoke_dynamic_at_put(int which, int bootstrap_specifier_index, int name_and_type_index) { |
John R Rose | a4e4149 | 2010-07-15 18:40:45 -0700 | [diff] [blame] | 263 | tag_at_put(which, JVM_CONSTANT_InvokeDynamic); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 264 | *int_at_addr(which) = ((jint) name_and_type_index<<16) | bootstrap_specifier_index; |
John R Rose | a4e4149 | 2010-07-15 18:40:45 -0700 | [diff] [blame] | 265 | } |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 266 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 267 | void unresolved_string_at_put(int which, Symbol* s) { |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 268 | release_tag_at_put(which, JVM_CONSTANT_String); |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 269 | slot_at_put(which, CPSlot(s, CPSlot::_symbol_bit)); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | void int_at_put(int which, jint i) { |
| 273 | tag_at_put(which, JVM_CONSTANT_Integer); |
| 274 | *int_at_addr(which) = i; |
| 275 | } |
| 276 | |
| 277 | void long_at_put(int which, jlong l) { |
| 278 | tag_at_put(which, JVM_CONSTANT_Long); |
| 279 | // *long_at_addr(which) = l; |
| 280 | Bytes::put_native_u8((address)long_at_addr(which), *((u8*) &l)); |
| 281 | } |
| 282 | |
| 283 | void float_at_put(int which, jfloat f) { |
| 284 | tag_at_put(which, JVM_CONSTANT_Float); |
| 285 | *float_at_addr(which) = f; |
| 286 | } |
| 287 | |
| 288 | void double_at_put(int which, jdouble d) { |
| 289 | tag_at_put(which, JVM_CONSTANT_Double); |
| 290 | // *double_at_addr(which) = d; |
| 291 | // u8 temp = *(u8*) &d; |
| 292 | Bytes::put_native_u8((address) double_at_addr(which), *((u8*) &d)); |
| 293 | } |
| 294 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 295 | Symbol** symbol_at_addr(int which) const { |
| 296 | assert(is_within_bounds(which), "index out of bounds"); |
| 297 | return (Symbol**) &base()[which]; |
| 298 | } |
| 299 | |
| 300 | void symbol_at_put(int which, Symbol* s) { |
| 301 | assert(s->refcount() != 0, "should have nonzero refcount"); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 302 | tag_at_put(which, JVM_CONSTANT_Utf8); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 303 | *symbol_at_addr(which) = s; |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 304 | } |
| 305 | |
Goetz Lindenmaier | b26df6b | 2016-01-04 15:41:05 +0100 | [diff] [blame] | 306 | void string_at_put(int which, int obj_index, oop str); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 307 | |
| 308 | // For temporary use while constructing constant pool |
| 309 | void string_index_at_put(int which, int string_index) { |
| 310 | tag_at_put(which, JVM_CONSTANT_StringIndex); |
| 311 | *int_at_addr(which) = string_index; |
| 312 | } |
| 313 | |
| 314 | void field_at_put(int which, int class_index, int name_and_type_index) { |
| 315 | tag_at_put(which, JVM_CONSTANT_Fieldref); |
| 316 | *int_at_addr(which) = ((jint) name_and_type_index<<16) | class_index; |
| 317 | } |
| 318 | |
| 319 | void method_at_put(int which, int class_index, int name_and_type_index) { |
| 320 | tag_at_put(which, JVM_CONSTANT_Methodref); |
| 321 | *int_at_addr(which) = ((jint) name_and_type_index<<16) | class_index; |
| 322 | } |
| 323 | |
| 324 | void interface_method_at_put(int which, int class_index, int name_and_type_index) { |
| 325 | tag_at_put(which, JVM_CONSTANT_InterfaceMethodref); |
| 326 | *int_at_addr(which) = ((jint) name_and_type_index<<16) | class_index; // Not so nice |
| 327 | } |
| 328 | |
| 329 | void name_and_type_at_put(int which, int name_index, int signature_index) { |
| 330 | tag_at_put(which, JVM_CONSTANT_NameAndType); |
| 331 | *int_at_addr(which) = ((jint) signature_index<<16) | name_index; // Not so nice |
| 332 | } |
| 333 | |
| 334 | // Tag query |
| 335 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 336 | constantTag tag_at(int which) const { return (constantTag)tags()->at_acquire(which); } |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 337 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 338 | // Fetching constants |
| 339 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 340 | Klass* klass_at(int which, TRAPS) { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 341 | constantPoolHandle h_this(THREAD, this); |
Stefan Karlsson | 692dbfd | 2014-11-12 13:55:59 +0100 | [diff] [blame] | 342 | return klass_at_impl(h_this, which, true, THREAD); |
Coleen Phillimore | 6308052 | 2014-10-28 17:02:08 -0400 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | // Version of klass_at that doesn't save the resolution error, called during deopt |
| 346 | Klass* klass_at_ignore_error(int which, TRAPS) { |
| 347 | constantPoolHandle h_this(THREAD, this); |
Stefan Karlsson | 692dbfd | 2014-11-12 13:55:59 +0100 | [diff] [blame] | 348 | return klass_at_impl(h_this, which, false, THREAD); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 349 | } |
| 350 | |
Markus Grönlund | 2ad9d31 | 2015-12-08 20:04:03 +0100 | [diff] [blame] | 351 | Symbol* klass_name_at(int which) const; // Returns the name, w/o resolving. |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 352 | |
Yumin Qi | c6aa9c6 | 2013-05-10 08:27:30 -0700 | [diff] [blame] | 353 | Klass* resolved_klass_at(int which) const { // Used by Compiler |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 354 | guarantee(tag_at(which).is_klass(), "Corrupted constant pool"); |
| 355 | // Must do an acquire here in case another thread resolved the klass |
| 356 | // behind our back, lest we later load stale values thru the oop. |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 357 | return CPSlot((Klass*)OrderAccess::load_ptr_acquire(obj_at_addr_raw(which))).get_klass(); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 358 | } |
| 359 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 360 | // RedefineClasses() API support: |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 361 | Symbol* klass_at_noresolve(int which) { return klass_name_at(which); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 362 | |
| 363 | jint int_at(int which) { |
| 364 | assert(tag_at(which).is_int(), "Corrupted constant pool"); |
| 365 | return *int_at_addr(which); |
| 366 | } |
| 367 | |
| 368 | jlong long_at(int which) { |
| 369 | assert(tag_at(which).is_long(), "Corrupted constant pool"); |
| 370 | // return *long_at_addr(which); |
| 371 | u8 tmp = Bytes::get_native_u8((address)&base()[which]); |
| 372 | return *((jlong*)&tmp); |
| 373 | } |
| 374 | |
| 375 | jfloat float_at(int which) { |
| 376 | assert(tag_at(which).is_float(), "Corrupted constant pool"); |
| 377 | return *float_at_addr(which); |
| 378 | } |
| 379 | |
| 380 | jdouble double_at(int which) { |
| 381 | assert(tag_at(which).is_double(), "Corrupted constant pool"); |
| 382 | u8 tmp = Bytes::get_native_u8((address)&base()[which]); |
| 383 | return *((jdouble*)&tmp); |
| 384 | } |
| 385 | |
Markus Grönlund | 2ad9d31 | 2015-12-08 20:04:03 +0100 | [diff] [blame] | 386 | Symbol* symbol_at(int which) const { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 387 | assert(tag_at(which).is_utf8(), "Corrupted constant pool"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 388 | return *symbol_at_addr(which); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 389 | } |
| 390 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 391 | oop string_at(int which, int obj_index, TRAPS) { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 392 | constantPoolHandle h_this(THREAD, this); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 393 | return string_at_impl(h_this, which, obj_index, THREAD); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 394 | } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 395 | oop string_at(int which, TRAPS) { |
| 396 | int obj_index = cp_to_object_index(which); |
| 397 | return string_at(which, obj_index, THREAD); |
| 398 | } |
| 399 | |
| 400 | // Version that can be used before string oop array is created. |
| 401 | oop uncached_string_at(int which, TRAPS); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 402 | |
Tobias Hartmann | 06c26b6 | 2014-04-29 08:08:44 +0200 | [diff] [blame] | 403 | // A "pseudo-string" is an non-string oop that has found its way into |
John R Rose | 849e0ff | 2008-11-12 22:33:26 -0800 | [diff] [blame] | 404 | // a String entry. |
Tobias Hartmann | 06c26b6 | 2014-04-29 08:08:44 +0200 | [diff] [blame] | 405 | // This can happen if the user patches a live |
John R Rose | 849e0ff | 2008-11-12 22:33:26 -0800 | [diff] [blame] | 406 | // object into a CONSTANT_String entry of an anonymous class. |
| 407 | // Method oops internally created for method handles may also |
| 408 | // use pseudo-strings to link themselves to related metaobjects. |
| 409 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 410 | bool is_pseudo_string_at(int which) { |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 411 | assert(tag_at(which).is_string(), "Corrupted constant pool"); |
| 412 | return slot_at(which).is_pseudo_string(); |
John R Rose | 849e0ff | 2008-11-12 22:33:26 -0800 | [diff] [blame] | 413 | } |
| 414 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 415 | oop pseudo_string_at(int which, int obj_index) { |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 416 | assert(is_pseudo_string_at(which), "must be a pseudo-string"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 417 | oop s = resolved_references()->obj_at(obj_index); |
| 418 | return s; |
| 419 | } |
| 420 | |
Coleen Phillimore | b8b9434 | 2013-02-22 08:36:42 -0500 | [diff] [blame] | 421 | oop pseudo_string_at(int which) { |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 422 | assert(is_pseudo_string_at(which), "must be a pseudo-string"); |
Coleen Phillimore | b8b9434 | 2013-02-22 08:36:42 -0500 | [diff] [blame] | 423 | int obj_index = cp_to_object_index(which); |
| 424 | oop s = resolved_references()->obj_at(obj_index); |
| 425 | return s; |
| 426 | } |
| 427 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 428 | void pseudo_string_at_put(int which, int obj_index, oop x) { |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 429 | assert(tag_at(which).is_string(), "Corrupted constant pool"); |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 430 | Symbol* sym = unresolved_string_at(which); |
| 431 | slot_at_put(which, CPSlot(sym, (CPSlot::_symbol_bit | CPSlot::_pseudo_bit))); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 432 | string_at_put(which, obj_index, x); // this works just fine |
John R Rose | 849e0ff | 2008-11-12 22:33:26 -0800 | [diff] [blame] | 433 | } |
| 434 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 435 | // only called when we are sure a string entry is already resolved (via an |
| 436 | // earlier string_at call. |
| 437 | oop resolved_string_at(int which) { |
| 438 | assert(tag_at(which).is_string(), "Corrupted constant pool"); |
| 439 | // Must do an acquire here in case another thread resolved the klass |
| 440 | // behind our back, lest we later load stale values thru the oop. |
Coleen Phillimore | 28047d6 | 2012-09-29 06:40:00 -0400 | [diff] [blame] | 441 | // we might want a volatile_obj_at in ObjArrayKlass. |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 442 | int obj_index = cp_to_object_index(which); |
| 443 | return resolved_references()->obj_at(obj_index); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 444 | } |
| 445 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 446 | Symbol* unresolved_string_at(int which) { |
| 447 | assert(tag_at(which).is_string(), "Corrupted constant pool"); |
Serguei Spitsyn | 8be0bb5 | 2015-01-29 03:11:01 -0800 | [diff] [blame] | 448 | Symbol* sym = slot_at(which).get_symbol(); |
| 449 | return sym; |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | // Returns an UTF8 for a CONSTANT_String entry at a given index. |
| 453 | // UTF8 char* representation was chosen to avoid conversion of |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 454 | // java_lang_Strings at resolved entries into Symbol*s |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 455 | // or vice versa. |
| 456 | char* string_at_noresolve(int which); |
| 457 | |
| 458 | jint name_and_type_at(int which) { |
| 459 | assert(tag_at(which).is_name_and_type(), "Corrupted constant pool"); |
| 460 | return *int_at_addr(which); |
| 461 | } |
| 462 | |
Coleen Phillimore | 8e63a10 | 2016-04-13 12:57:31 -0400 | [diff] [blame] | 463 | int method_handle_ref_kind_at(int which) { |
Ioi Lam | 5220514 | 2013-09-23 08:56:19 -0700 | [diff] [blame] | 464 | assert(tag_at(which).is_method_handle() || |
Coleen Phillimore | 8e63a10 | 2016-04-13 12:57:31 -0400 | [diff] [blame] | 465 | tag_at(which).is_method_handle_in_error(), "Corrupted constant pool"); |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 466 | return extract_low_short_from_int(*int_at_addr(which)); // mask out unwanted ref_index bits |
| 467 | } |
Coleen Phillimore | 8e63a10 | 2016-04-13 12:57:31 -0400 | [diff] [blame] | 468 | int method_handle_index_at(int which) { |
Ioi Lam | 5220514 | 2013-09-23 08:56:19 -0700 | [diff] [blame] | 469 | assert(tag_at(which).is_method_handle() || |
Coleen Phillimore | 8e63a10 | 2016-04-13 12:57:31 -0400 | [diff] [blame] | 470 | tag_at(which).is_method_handle_in_error(), "Corrupted constant pool"); |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 471 | return extract_high_short_from_int(*int_at_addr(which)); // shift out unwanted ref_kind bits |
| 472 | } |
Ioi Lam | 5220514 | 2013-09-23 08:56:19 -0700 | [diff] [blame] | 473 | int method_type_index_at(int which) { |
Coleen Phillimore | 8e63a10 | 2016-04-13 12:57:31 -0400 | [diff] [blame] | 474 | assert(tag_at(which).is_method_type() || |
| 475 | tag_at(which).is_method_type_in_error(), "Corrupted constant pool"); |
| 476 | return *int_at_addr(which); |
Ioi Lam | 5220514 | 2013-09-23 08:56:19 -0700 | [diff] [blame] | 477 | } |
| 478 | |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 479 | // Derived queries: |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 480 | Symbol* method_handle_name_ref_at(int which) { |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 481 | int member = method_handle_index_at(which); |
| 482 | return impl_name_ref_at(member, true); |
| 483 | } |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 484 | Symbol* method_handle_signature_ref_at(int which) { |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 485 | int member = method_handle_index_at(which); |
| 486 | return impl_signature_ref_at(member, true); |
| 487 | } |
| 488 | int method_handle_klass_index_at(int which) { |
| 489 | int member = method_handle_index_at(which); |
| 490 | return impl_klass_ref_index_at(member, true); |
| 491 | } |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 492 | Symbol* method_type_signature_at(int which) { |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 493 | int sym = method_type_index_at(which); |
| 494 | return symbol_at(sym); |
| 495 | } |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 496 | |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 497 | int invoke_dynamic_name_and_type_ref_index_at(int which) { |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 498 | assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 499 | return extract_high_short_from_int(*int_at_addr(which)); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 500 | } |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 501 | int invoke_dynamic_bootstrap_specifier_index(int which) { |
| 502 | assert(tag_at(which).value() == JVM_CONSTANT_InvokeDynamic, "Corrupted constant pool"); |
| 503 | return extract_low_short_from_int(*int_at_addr(which)); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 504 | } |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 505 | int invoke_dynamic_operand_base(int which) { |
| 506 | int bootstrap_specifier_index = invoke_dynamic_bootstrap_specifier_index(which); |
| 507 | return operand_offset_at(operands(), bootstrap_specifier_index); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 508 | } |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 509 | // The first part of the operands array consists of an index into the second part. |
| 510 | // Extract a 32-bit index value from the first part. |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 511 | static int operand_offset_at(Array<u2>* operands, int bootstrap_specifier_index) { |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 512 | int n = (bootstrap_specifier_index * 2); |
| 513 | assert(n >= 0 && n+2 <= operands->length(), "oob"); |
| 514 | // The first 32-bit index points to the beginning of the second part |
| 515 | // of the operands array. Make sure this index is in the first part. |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 516 | DEBUG_ONLY(int second_part = build_int_from_shorts(operands->at(0), |
| 517 | operands->at(1))); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 518 | assert(second_part == 0 || n+2 <= second_part, "oob (2)"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 519 | int offset = build_int_from_shorts(operands->at(n+0), |
| 520 | operands->at(n+1)); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 521 | // The offset itself must point into the second part of the array. |
| 522 | assert(offset == 0 || offset >= second_part && offset <= operands->length(), "oob (3)"); |
| 523 | return offset; |
| 524 | } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 525 | static void operand_offset_at_put(Array<u2>* operands, int bootstrap_specifier_index, int offset) { |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 526 | int n = bootstrap_specifier_index * 2; |
| 527 | assert(n >= 0 && n+2 <= operands->length(), "oob"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 528 | operands->at_put(n+0, extract_low_short_from_int(offset)); |
| 529 | operands->at_put(n+1, extract_high_short_from_int(offset)); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 530 | } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 531 | static int operand_array_length(Array<u2>* operands) { |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 532 | if (operands == NULL || operands->length() == 0) return 0; |
| 533 | int second_part = operand_offset_at(operands, 0); |
| 534 | return (second_part / 2); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 535 | } |
| 536 | |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 537 | #ifdef ASSERT |
| 538 | // operand tuples fit together exactly, end to end |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 539 | static int operand_limit_at(Array<u2>* operands, int bootstrap_specifier_index) { |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 540 | int nextidx = bootstrap_specifier_index + 1; |
| 541 | if (nextidx == operand_array_length(operands)) |
| 542 | return operands->length(); |
| 543 | else |
| 544 | return operand_offset_at(operands, nextidx); |
| 545 | } |
| 546 | int invoke_dynamic_operand_limit(int which) { |
| 547 | int bootstrap_specifier_index = invoke_dynamic_bootstrap_specifier_index(which); |
| 548 | return operand_limit_at(operands(), bootstrap_specifier_index); |
| 549 | } |
| 550 | #endif //ASSERT |
| 551 | |
| 552 | // layout of InvokeDynamic bootstrap method specifier (in second part of operands array): |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 553 | enum { |
| 554 | _indy_bsm_offset = 0, // CONSTANT_MethodHandle bsm |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 555 | _indy_argc_offset = 1, // u2 argc |
| 556 | _indy_argv_offset = 2 // u2 argv[argc] |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 557 | }; |
Serguei Spitsyn | 333cf9a | 2013-04-25 03:58:53 -0700 | [diff] [blame] | 558 | |
| 559 | // These functions are used in RedefineClasses for CP merge |
| 560 | |
| 561 | int operand_offset_at(int bootstrap_specifier_index) { |
| 562 | assert(0 <= bootstrap_specifier_index && |
| 563 | bootstrap_specifier_index < operand_array_length(operands()), |
| 564 | "Corrupted CP operands"); |
| 565 | return operand_offset_at(operands(), bootstrap_specifier_index); |
| 566 | } |
| 567 | int operand_bootstrap_method_ref_index_at(int bootstrap_specifier_index) { |
| 568 | int offset = operand_offset_at(bootstrap_specifier_index); |
| 569 | return operands()->at(offset + _indy_bsm_offset); |
| 570 | } |
| 571 | int operand_argument_count_at(int bootstrap_specifier_index) { |
| 572 | int offset = operand_offset_at(bootstrap_specifier_index); |
| 573 | int argc = operands()->at(offset + _indy_argc_offset); |
| 574 | return argc; |
| 575 | } |
| 576 | int operand_argument_index_at(int bootstrap_specifier_index, int j) { |
| 577 | int offset = operand_offset_at(bootstrap_specifier_index); |
| 578 | return operands()->at(offset + _indy_argv_offset + j); |
| 579 | } |
| 580 | int operand_next_offset_at(int bootstrap_specifier_index) { |
| 581 | int offset = operand_offset_at(bootstrap_specifier_index) + _indy_argv_offset |
| 582 | + operand_argument_count_at(bootstrap_specifier_index); |
| 583 | return offset; |
| 584 | } |
| 585 | // Compare a bootsrap specifier in the operands arrays |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 586 | bool compare_operand_to(int bootstrap_specifier_index1, const constantPoolHandle& cp2, |
Serguei Spitsyn | 333cf9a | 2013-04-25 03:58:53 -0700 | [diff] [blame] | 587 | int bootstrap_specifier_index2, TRAPS); |
| 588 | // Find a bootsrap specifier in the operands array |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 589 | int find_matching_operand(int bootstrap_specifier_index, const constantPoolHandle& search_cp, |
Serguei Spitsyn | 333cf9a | 2013-04-25 03:58:53 -0700 | [diff] [blame] | 590 | int operands_cur_len, TRAPS); |
| 591 | // Resize the operands array with delta_len and delta_size |
| 592 | void resize_operands(int delta_len, int delta_size, TRAPS); |
| 593 | // Extend the operands array with the length and size of the ext_cp operands |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 594 | void extend_operands(const constantPoolHandle& ext_cp, TRAPS); |
Serguei Spitsyn | 333cf9a | 2013-04-25 03:58:53 -0700 | [diff] [blame] | 595 | // Shrink the operands array to a smaller array with new_len length |
| 596 | void shrink_operands(int new_len, TRAPS); |
| 597 | |
| 598 | |
John R Rose | a4e4149 | 2010-07-15 18:40:45 -0700 | [diff] [blame] | 599 | int invoke_dynamic_bootstrap_method_ref_index_at(int which) { |
| 600 | assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 601 | int op_base = invoke_dynamic_operand_base(which); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 602 | return operands()->at(op_base + _indy_bsm_offset); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 603 | } |
| 604 | int invoke_dynamic_argument_count_at(int which) { |
| 605 | assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 606 | int op_base = invoke_dynamic_operand_base(which); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 607 | int argc = operands()->at(op_base + _indy_argc_offset); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 608 | DEBUG_ONLY(int end_offset = op_base + _indy_argv_offset + argc; |
| 609 | int next_offset = invoke_dynamic_operand_limit(which)); |
| 610 | assert(end_offset == next_offset, "matched ending"); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 611 | return argc; |
| 612 | } |
| 613 | int invoke_dynamic_argument_index_at(int which, int j) { |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 614 | int op_base = invoke_dynamic_operand_base(which); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 615 | DEBUG_ONLY(int argc = operands()->at(op_base + _indy_argc_offset)); |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 616 | assert((uint)j < (uint)argc, "oob"); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 617 | return operands()->at(op_base + _indy_argv_offset + j); |
John R Rose | a4e4149 | 2010-07-15 18:40:45 -0700 | [diff] [blame] | 618 | } |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 619 | |
John R Rose | 34c1d72 | 2009-04-21 23:21:04 -0700 | [diff] [blame] | 620 | // The following methods (name/signature/klass_ref_at, klass_ref_at_noresolve, |
John R Rose | 903247c | 2009-10-30 16:22:59 -0700 | [diff] [blame] | 621 | // name_and_type_ref_index_at) all expect to be passed indices obtained |
John R Rose | b22ecee | 2010-10-30 11:45:35 -0700 | [diff] [blame] | 622 | // directly from the bytecode. |
John R Rose | 903247c | 2009-10-30 16:22:59 -0700 | [diff] [blame] | 623 | // If the indices are meant to refer to fields or methods, they are |
John R Rose | b22ecee | 2010-10-30 11:45:35 -0700 | [diff] [blame] | 624 | // actually rewritten constant pool cache indices. |
John R Rose | 903247c | 2009-10-30 16:22:59 -0700 | [diff] [blame] | 625 | // The routine remap_instruction_operand_from_cache manages the adjustment |
| 626 | // of these values back to constant pool indices. |
John R Rose | 34c1d72 | 2009-04-21 23:21:04 -0700 | [diff] [blame] | 627 | |
John R Rose | 903247c | 2009-10-30 16:22:59 -0700 | [diff] [blame] | 628 | // There are also "uncached" versions which do not adjust the operand index; see below. |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 629 | |
John R Rose | b22ecee | 2010-10-30 11:45:35 -0700 | [diff] [blame] | 630 | // FIXME: Consider renaming these with a prefix "cached_" to make the distinction clear. |
| 631 | // In a few cases (the verifier) there are uses before a cpcache has been built, |
| 632 | // which are handled by a dynamic check in remap_instruction_operand_from_cache. |
| 633 | // FIXME: Remove the dynamic check, and adjust all callers to specify the correct mode. |
| 634 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 635 | // Lookup for entries consisting of (klass_index, name_and_type index) |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 636 | Klass* klass_ref_at(int which, TRAPS); |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 637 | Symbol* klass_ref_at_noresolve(int which); |
| 638 | Symbol* name_ref_at(int which) { return impl_name_ref_at(which, false); } |
| 639 | Symbol* signature_ref_at(int which) { return impl_signature_ref_at(which, false); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 640 | |
John R Rose | 34c1d72 | 2009-04-21 23:21:04 -0700 | [diff] [blame] | 641 | int klass_ref_index_at(int which) { return impl_klass_ref_index_at(which, false); } |
| 642 | int name_and_type_ref_index_at(int which) { return impl_name_and_type_ref_index_at(which, false); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 643 | |
Christian Thalinger | 16526e0 | 2015-10-08 12:49:30 -1000 | [diff] [blame] | 644 | int remap_instruction_operand_from_cache(int operand); // operand must be biased by CPCACHE_INDEX_TAG |
| 645 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 646 | // Lookup for entries consisting of (name_index, signature_index) |
John R Rose | 34c1d72 | 2009-04-21 23:21:04 -0700 | [diff] [blame] | 647 | int name_ref_index_at(int which_nt); // == low-order jshort of name_and_type_at(which_nt) |
| 648 | int signature_ref_index_at(int which_nt); // == high-order jshort of name_and_type_at(which_nt) |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 649 | |
Markus Grönlund | 2ad9d31 | 2015-12-08 20:04:03 +0100 | [diff] [blame] | 650 | BasicType basic_type_for_signature_at(int which) const; |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 651 | |
| 652 | // Resolve string constants (to prevent allocation during compilation) |
| 653 | void resolve_string_constants(TRAPS) { |
| 654 | constantPoolHandle h_this(THREAD, this); |
| 655 | resolve_string_constants_impl(h_this, CHECK); |
| 656 | } |
| 657 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 658 | // CDS support |
| 659 | void remove_unshareable_info(); |
| 660 | void restore_unshareable_info(TRAPS); |
| 661 | bool resolve_class_constants(TRAPS); |
Coleen Phillimore | 8536f54 | 2012-09-05 20:08:08 -0400 | [diff] [blame] | 662 | // The ConstantPool vtable is restored by this call when the ConstantPool is |
| 663 | // in the shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
| 664 | // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
| 665 | // by their vtable. |
| 666 | void restore_vtable() { guarantee(is_constantPool(), "vtable restored by this call"); } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 667 | |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 668 | private: |
| 669 | enum { _no_index_sentinel = -1, _possible_index_sentinel = -2 }; |
| 670 | public: |
| 671 | |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 672 | // Resolve late bound constants. |
| 673 | oop resolve_constant_at(int index, TRAPS) { |
| 674 | constantPoolHandle h_this(THREAD, this); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 675 | return resolve_constant_at_impl(h_this, index, _no_index_sentinel, THREAD); |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | oop resolve_cached_constant_at(int cache_index, TRAPS) { |
| 679 | constantPoolHandle h_this(THREAD, this); |
John R Rose | ce0125e | 2010-10-30 13:08:23 -0700 | [diff] [blame] | 680 | return resolve_constant_at_impl(h_this, _no_index_sentinel, cache_index, THREAD); |
| 681 | } |
| 682 | |
| 683 | oop resolve_possibly_cached_constant_at(int pool_index, TRAPS) { |
| 684 | constantPoolHandle h_this(THREAD, this); |
| 685 | return resolve_constant_at_impl(h_this, pool_index, _possible_index_sentinel, THREAD); |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 686 | } |
| 687 | |
Christian Thalinger | 12901d0 | 2012-07-24 10:51:00 -0700 | [diff] [blame] | 688 | oop resolve_bootstrap_specifier_at(int index, TRAPS) { |
| 689 | constantPoolHandle h_this(THREAD, this); |
| 690 | return resolve_bootstrap_specifier_at_impl(h_this, index, THREAD); |
| 691 | } |
| 692 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 693 | // Klass name matches name at offset |
| 694 | bool klass_name_at_matches(instanceKlassHandle k, int which); |
| 695 | |
| 696 | // Sizing |
Coleen Phillimore | 4a831d4 | 2008-04-13 17:43:42 -0400 | [diff] [blame] | 697 | int length() const { return _length; } |
| 698 | void set_length(int length) { _length = length; } |
| 699 | |
| 700 | // Tells whether index is within bounds. |
| 701 | bool is_within_bounds(int index) const { |
| 702 | return 0 <= index && index < length(); |
| 703 | } |
| 704 | |
Ioi Lam | 93b845e | 2013-01-25 15:06:18 -0500 | [diff] [blame] | 705 | // Sizing (in words) |
Coleen Phillimore | 97e169a | 2016-01-30 11:02:29 -0500 | [diff] [blame] | 706 | static int header_size() { return sizeof(ConstantPool)/wordSize; } |
| 707 | static int size(int length) { return align_metadata_size(header_size() + length); } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 708 | int size() const { return size(length()); } |
Ioi Lam | 93b845e | 2013-01-25 15:06:18 -0500 | [diff] [blame] | 709 | #if INCLUDE_SERVICES |
| 710 | void collect_statistics(KlassSizeStats *sz) const; |
| 711 | #endif |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 712 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 713 | friend class ClassFileParser; |
| 714 | friend class SystemDictionary; |
| 715 | |
| 716 | // Used by compiler to prevent classloading. |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 717 | static Method* method_at_if_loaded (const constantPoolHandle& this_cp, int which); |
| 718 | static bool has_appendix_at_if_loaded (const constantPoolHandle& this_cp, int which); |
| 719 | static oop appendix_at_if_loaded (const constantPoolHandle& this_cp, int which); |
| 720 | static bool has_method_type_at_if_loaded (const constantPoolHandle& this_cp, int which); |
| 721 | static oop method_type_at_if_loaded (const constantPoolHandle& this_cp, int which); |
| 722 | static Klass* klass_at_if_loaded (const constantPoolHandle& this_cp, int which); |
| 723 | static Klass* klass_ref_at_if_loaded (const constantPoolHandle& this_cp, int which); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 724 | |
| 725 | // Routines currently used for annotations (only called by jvm.cpp) but which might be used in the |
John R Rose | b22ecee | 2010-10-30 11:45:35 -0700 | [diff] [blame] | 726 | // future by other Java code. These take constant pool indices rather than |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 727 | // constant pool cache indices as do the peer methods above. |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 728 | Symbol* uncached_klass_ref_at_noresolve(int which); |
| 729 | Symbol* uncached_name_ref_at(int which) { return impl_name_ref_at(which, true); } |
| 730 | Symbol* uncached_signature_ref_at(int which) { return impl_signature_ref_at(which, true); } |
John R Rose | 34c1d72 | 2009-04-21 23:21:04 -0700 | [diff] [blame] | 731 | int uncached_klass_ref_index_at(int which) { return impl_klass_ref_index_at(which, true); } |
| 732 | int uncached_name_and_type_ref_index_at(int which) { return impl_name_and_type_ref_index_at(which, true); } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 733 | |
| 734 | // Sharing |
| 735 | int pre_resolve_shared_klasses(TRAPS); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 736 | |
| 737 | // Debugging |
| 738 | const char* printable_name_at(int which) PRODUCT_RETURN0; |
| 739 | |
John R Rose | 581521b | 2010-05-23 01:38:26 -0700 | [diff] [blame] | 740 | #ifdef ASSERT |
| 741 | enum { CPCACHE_INDEX_TAG = 0x10000 }; // helps keep CP cache indices distinct from CP indices |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 742 | #else |
| 743 | enum { CPCACHE_INDEX_TAG = 0 }; // in product mode, this zero value is a no-op |
John R Rose | 581521b | 2010-05-23 01:38:26 -0700 | [diff] [blame] | 744 | #endif //ASSERT |
| 745 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 746 | static int decode_cpcache_index(int raw_index, bool invokedynamic_ok = false) { |
| 747 | if (invokedynamic_ok && is_invokedynamic_index(raw_index)) |
| 748 | return decode_invokedynamic_index(raw_index); |
| 749 | else |
| 750 | return raw_index - CPCACHE_INDEX_TAG; |
| 751 | } |
Christian Thalinger | 12901d0 | 2012-07-24 10:51:00 -0700 | [diff] [blame] | 752 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 753 | private: |
| 754 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 755 | void set_resolved_references(jobject s) { _resolved_references = s; } |
| 756 | Array<u2>* reference_map() const { return _reference_map; } |
| 757 | void set_reference_map(Array<u2>* o) { _reference_map = o; } |
| 758 | |
| 759 | // patch JSR 292 resolved references after the class is linked. |
| 760 | void patch_resolved_references(GrowableArray<Handle>* cp_patches); |
| 761 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 762 | Symbol* impl_name_ref_at(int which, bool uncached); |
| 763 | Symbol* impl_signature_ref_at(int which, bool uncached); |
John R Rose | 34c1d72 | 2009-04-21 23:21:04 -0700 | [diff] [blame] | 764 | int impl_klass_ref_index_at(int which, bool uncached); |
| 765 | int impl_name_and_type_ref_index_at(int which, bool uncached); |
| 766 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 767 | // Used while constructing constant pool (only by ClassFileParser) |
| 768 | jint klass_index_at(int which) { |
| 769 | assert(tag_at(which).is_klass_index(), "Corrupted constant pool"); |
| 770 | return *int_at_addr(which); |
| 771 | } |
| 772 | |
| 773 | jint string_index_at(int which) { |
| 774 | assert(tag_at(which).is_string_index(), "Corrupted constant pool"); |
| 775 | return *int_at_addr(which); |
| 776 | } |
| 777 | |
| 778 | // Performs the LinkResolver checks |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 779 | static void verify_constant_pool_resolve(const constantPoolHandle& this_cp, KlassHandle klass, TRAPS); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 780 | |
| 781 | // Implementation of methods that needs an exposed 'this' pointer, in order to |
| 782 | // handle GC while executing the method |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 783 | static Klass* klass_at_impl(const constantPoolHandle& this_cp, int which, |
Coleen Phillimore | 6308052 | 2014-10-28 17:02:08 -0400 | [diff] [blame] | 784 | bool save_resolution_error, TRAPS); |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 785 | static oop string_at_impl(const constantPoolHandle& this_cp, int which, int obj_index, TRAPS); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 786 | |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 787 | static void trace_class_resolution(const constantPoolHandle& this_cp, KlassHandle k); |
Coleen Phillimore | 243d697 | 2014-06-19 11:16:10 -0400 | [diff] [blame] | 788 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 789 | // Resolve string constants (to prevent allocation during compilation) |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 790 | static void resolve_string_constants_impl(const constantPoolHandle& this_cp, TRAPS); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 791 | |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 792 | static oop resolve_constant_at_impl(const constantPoolHandle& this_cp, int index, int cache_index, TRAPS); |
| 793 | static oop resolve_bootstrap_specifier_at_impl(const constantPoolHandle& this_cp, int index, TRAPS); |
John R Rose | 1f4cfb0 | 2010-06-09 18:50:45 -0700 | [diff] [blame] | 794 | |
Coleen Phillimore | 7e2463e | 2014-05-05 19:53:00 -0400 | [diff] [blame] | 795 | // Exception handling |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 796 | static void throw_resolution_error(const constantPoolHandle& this_cp, int which, TRAPS); |
| 797 | static Symbol* exception_message(const constantPoolHandle& this_cp, int which, constantTag tag, oop pending_exception); |
| 798 | static void save_and_throw_exception(const constantPoolHandle& this_cp, int which, constantTag tag, TRAPS); |
Coleen Phillimore | 7e2463e | 2014-05-05 19:53:00 -0400 | [diff] [blame] | 799 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 800 | public: |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 801 | // Merging ConstantPool* support: |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 802 | bool compare_entry_to(int index1, const constantPoolHandle& cp2, int index2, TRAPS); |
| 803 | void copy_cp_to(int start_i, int end_i, const constantPoolHandle& to_cp, int to_i, TRAPS) { |
John R Rose | cc7c58e | 2010-12-03 15:53:57 -0800 | [diff] [blame] | 804 | constantPoolHandle h_this(THREAD, this); |
| 805 | copy_cp_to_impl(h_this, start_i, end_i, to_cp, to_i, THREAD); |
| 806 | } |
Coleen Phillimore | f1e89ea | 2015-10-23 16:48:38 -0400 | [diff] [blame] | 807 | static void copy_cp_to_impl(const constantPoolHandle& from_cp, int start_i, int end_i, const constantPoolHandle& to_cp, int to_i, TRAPS); |
| 808 | static void copy_entry_to(const constantPoolHandle& from_cp, int from_i, const constantPoolHandle& to_cp, int to_i, TRAPS); |
| 809 | static void copy_operands(const constantPoolHandle& from_cp, const constantPoolHandle& to_cp, TRAPS); |
| 810 | int find_matching_entry(int pattern_i, const constantPoolHandle& search_cp, TRAPS); |
Coleen Phillimore | e508ba9 | 2013-01-17 13:40:31 -0500 | [diff] [blame] | 811 | int version() const { return _saved._version; } |
| 812 | void set_version(int version) { _saved._version = version; } |
| 813 | void increment_and_save_version(int version) { |
Coleen Phillimore | 833b7fc | 2013-01-17 22:11:57 -0500 | [diff] [blame] | 814 | _saved._version = version >= 0 ? (version + 1) : version; // keep overflow |
Coleen Phillimore | e508ba9 | 2013-01-17 13:40:31 -0500 | [diff] [blame] | 815 | } |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 816 | |
| 817 | void set_resolved_reference_length(int length) { _saved._resolved_reference_length = length; } |
| 818 | int resolved_reference_length() const { return _saved._resolved_reference_length; } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 819 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 820 | // Decrease ref counts of symbols that are in the constant pool |
| 821 | // when the holder class is unloaded |
| 822 | void unreference_symbols(); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 823 | |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 824 | // Deallocate constant pool for RedefineClasses |
| 825 | void deallocate_contents(ClassLoaderData* loader_data); |
| 826 | void release_C_heap_structures(); |
| 827 | |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 828 | // JVMTI accesss - GetConstantPool, RetransformClasses, ... |
| 829 | friend class JvmtiConstantPoolReconstituter; |
| 830 | |
| 831 | private: |
| 832 | jint cpool_entry_size(jint idx); |
| 833 | jint hash_entries_to(SymbolHashMap *symmap, SymbolHashMap *classmap); |
| 834 | |
| 835 | // Copy cpool bytes into byte array. |
| 836 | // Returns: |
| 837 | // int > 0, count of the raw cpool bytes that have been copied |
| 838 | // 0, OutOfMemory error |
| 839 | // -1, Internal error |
| 840 | int copy_cpool_bytes(int cpool_size, |
| 841 | SymbolHashMap* tbl, |
| 842 | unsigned char *bytes); |
Jon Masamitsu | 5c58d27 | 2012-09-01 13:25:18 -0400 | [diff] [blame] | 843 | |
| 844 | public: |
| 845 | // Verify |
| 846 | void verify_on(outputStream* st); |
| 847 | |
| 848 | // Printing |
| 849 | void print_on(outputStream* st) const; |
| 850 | void print_value_on(outputStream* st) const; |
| 851 | void print_entry_on(int index, outputStream* st); |
| 852 | |
| 853 | const char* internal_name() const { return "{constant pool}"; } |
| 854 | |
| 855 | #ifndef PRODUCT |
| 856 | // Compile the world support |
| 857 | static void preload_and_initialize_all_classes(ConstantPool* constant_pool, TRAPS); |
| 858 | #endif |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 859 | }; |
| 860 | |
Zhengyu Gu | a39b176 | 2012-06-28 17:03:16 -0400 | [diff] [blame] | 861 | class SymbolHashMapEntry : public CHeapObj<mtSymbol> { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 862 | private: |
| 863 | unsigned int _hash; // 32-bit hash for item |
| 864 | SymbolHashMapEntry* _next; // Next element in the linked list for this bucket |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 865 | Symbol* _symbol; // 1-st part of the mapping: symbol => value |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 866 | u2 _value; // 2-nd part of the mapping: symbol => value |
| 867 | |
| 868 | public: |
| 869 | unsigned int hash() const { return _hash; } |
| 870 | void set_hash(unsigned int hash) { _hash = hash; } |
| 871 | |
| 872 | SymbolHashMapEntry* next() const { return _next; } |
| 873 | void set_next(SymbolHashMapEntry* next) { _next = next; } |
| 874 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 875 | Symbol* symbol() const { return _symbol; } |
| 876 | void set_symbol(Symbol* sym) { _symbol = sym; } |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 877 | |
| 878 | u2 value() const { return _value; } |
| 879 | void set_value(u2 value) { _value = value; } |
| 880 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 881 | SymbolHashMapEntry(unsigned int hash, Symbol* symbol, u2 value) |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 882 | : _hash(hash), _symbol(symbol), _value(value), _next(NULL) {} |
| 883 | |
| 884 | }; // End SymbolHashMapEntry class |
| 885 | |
| 886 | |
Zhengyu Gu | a39b176 | 2012-06-28 17:03:16 -0400 | [diff] [blame] | 887 | class SymbolHashMapBucket : public CHeapObj<mtSymbol> { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 888 | |
| 889 | private: |
| 890 | SymbolHashMapEntry* _entry; |
| 891 | |
| 892 | public: |
| 893 | SymbolHashMapEntry* entry() const { return _entry; } |
| 894 | void set_entry(SymbolHashMapEntry* entry) { _entry = entry; } |
| 895 | void clear() { _entry = NULL; } |
| 896 | |
| 897 | }; // End SymbolHashMapBucket class |
| 898 | |
| 899 | |
Zhengyu Gu | a39b176 | 2012-06-28 17:03:16 -0400 | [diff] [blame] | 900 | class SymbolHashMap: public CHeapObj<mtSymbol> { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 901 | |
| 902 | private: |
| 903 | // Default number of entries in the table |
| 904 | enum SymbolHashMap_Constants { |
| 905 | _Def_HashMap_Size = 256 |
| 906 | }; |
| 907 | |
| 908 | int _table_size; |
| 909 | SymbolHashMapBucket* _buckets; |
| 910 | |
| 911 | void initialize_table(int table_size) { |
| 912 | _table_size = table_size; |
Zhengyu Gu | a39b176 | 2012-06-28 17:03:16 -0400 | [diff] [blame] | 913 | _buckets = NEW_C_HEAP_ARRAY(SymbolHashMapBucket, table_size, mtSymbol); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 914 | for (int index = 0; index < table_size; index++) { |
| 915 | _buckets[index].clear(); |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | public: |
| 920 | |
| 921 | int table_size() const { return _table_size; } |
| 922 | |
| 923 | SymbolHashMap() { initialize_table(_Def_HashMap_Size); } |
| 924 | SymbolHashMap(int table_size) { initialize_table(table_size); } |
| 925 | |
| 926 | // hash P(31) from Kernighan & Ritchie |
| 927 | static unsigned int compute_hash(const char* str, int len) { |
| 928 | unsigned int hash = 0; |
| 929 | while (len-- > 0) { |
| 930 | hash = 31*hash + (unsigned) *str; |
| 931 | str++; |
| 932 | } |
| 933 | return hash; |
| 934 | } |
| 935 | |
| 936 | SymbolHashMapEntry* bucket(int i) { |
| 937 | return _buckets[i].entry(); |
| 938 | } |
| 939 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 940 | void add_entry(Symbol* sym, u2 value); |
| 941 | SymbolHashMapEntry* find_entry(Symbol* sym); |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 942 | |
Coleen Phillimore | 7b4f807 | 2011-01-27 16:11:27 -0800 | [diff] [blame] | 943 | u2 symbol_to_value(Symbol* sym) { |
J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 944 | SymbolHashMapEntry *entry = find_entry(sym); |
| 945 | return (entry == NULL) ? 0 : entry->value(); |
| 946 | } |
| 947 | |
| 948 | ~SymbolHashMap() { |
| 949 | SymbolHashMapEntry* next; |
| 950 | for (int i = 0; i < _table_size; i++) { |
| 951 | for (SymbolHashMapEntry* cur = bucket(i); cur != NULL; cur = next) { |
| 952 | next = cur->next(); |
| 953 | delete(cur); |
| 954 | } |
| 955 | } |
| 956 | delete _buckets; |
| 957 | } |
| 958 | }; // End SymbolHashMap class |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 959 | |
| 960 | #endif // SHARE_VM_OOPS_CONSTANTPOOLOOP_HPP |