Mercurial > hg > truffle
annotate src/share/vm/interpreter/bytecode.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 1d7922586cf6 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "interpreter/bytecode.hpp" | |
| 27 #include "interpreter/linkResolver.hpp" | |
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28 #include "oops/constantPool.hpp" |
| 1972 | 29 #include "oops/oop.inline.hpp" |
| 30 #include "runtime/fieldType.hpp" | |
| 31 #include "runtime/handles.inline.hpp" | |
| 32 #include "runtime/safepoint.hpp" | |
| 33 #include "runtime/signature.hpp" | |
| 0 | 34 |
| 35 // Implementation of Bytecode | |
| 36 | |
| 1565 | 37 #ifdef ASSERT |
| 38 | |
| 39 void Bytecode::assert_same_format_as(Bytecodes::Code testbc, bool is_wide) const { | |
| 40 Bytecodes::Code thisbc = Bytecodes::cast(byte_at(0)); | |
| 41 if (thisbc == Bytecodes::_breakpoint) return; // let the assertion fail silently | |
| 42 if (is_wide) { | |
| 43 assert(thisbc == Bytecodes::_wide, "expected a wide instruction"); | |
| 44 thisbc = Bytecodes::cast(byte_at(1)); | |
| 45 if (thisbc == Bytecodes::_breakpoint) return; | |
| 46 } | |
| 47 int thisflags = Bytecodes::flags(testbc, is_wide) & Bytecodes::_all_fmt_bits; | |
| 48 int testflags = Bytecodes::flags(thisbc, is_wide) & Bytecodes::_all_fmt_bits; | |
| 49 if (thisflags != testflags) | |
| 50 tty->print_cr("assert_same_format_as(%d) failed on bc=%d%s; %d != %d", | |
| 51 (int)testbc, (int)thisbc, (is_wide?"/wide":""), testflags, thisflags); | |
| 52 assert(thisflags == testflags, "expected format"); | |
| 53 } | |
| 54 | |
| 55 void Bytecode::assert_index_size(int size, Bytecodes::Code bc, bool is_wide) { | |
| 56 int have_fmt = (Bytecodes::flags(bc, is_wide) | |
| 57 & (Bytecodes::_fmt_has_u2 | Bytecodes::_fmt_has_u4 | | |
| 58 Bytecodes::_fmt_not_simple | | |
| 59 // Not an offset field: | |
| 60 Bytecodes::_fmt_has_o)); | |
| 61 int need_fmt = -1; | |
| 62 switch (size) { | |
| 63 case 1: need_fmt = 0; break; | |
| 64 case 2: need_fmt = Bytecodes::_fmt_has_u2; break; | |
| 65 case 4: need_fmt = Bytecodes::_fmt_has_u4; break; | |
| 66 } | |
| 67 if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; | |
| 68 if (have_fmt != need_fmt) { | |
| 69 tty->print_cr("assert_index_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); | |
| 70 assert(have_fmt == need_fmt, "assert_index_size"); | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 void Bytecode::assert_offset_size(int size, Bytecodes::Code bc, bool is_wide) { | |
| 75 int have_fmt = Bytecodes::flags(bc, is_wide) & Bytecodes::_all_fmt_bits; | |
| 76 int need_fmt = -1; | |
| 77 switch (size) { | |
| 78 case 2: need_fmt = Bytecodes::_fmt_bo2; break; | |
| 79 case 4: need_fmt = Bytecodes::_fmt_bo4; break; | |
| 80 } | |
| 81 if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; | |
| 82 if (have_fmt != need_fmt) { | |
| 83 tty->print_cr("assert_offset_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); | |
| 84 assert(have_fmt == need_fmt, "assert_offset_size"); | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 void Bytecode::assert_constant_size(int size, int where, Bytecodes::Code bc, bool is_wide) { | |
| 89 int have_fmt = Bytecodes::flags(bc, is_wide) & (Bytecodes::_all_fmt_bits | |
| 90 // Ignore any 'i' field (for iinc): | |
| 91 & ~Bytecodes::_fmt_has_i); | |
| 92 int need_fmt = -1; | |
| 93 switch (size) { | |
| 94 case 1: need_fmt = Bytecodes::_fmt_bc; break; | |
| 95 case 2: need_fmt = Bytecodes::_fmt_bc | Bytecodes::_fmt_has_u2; break; | |
| 96 } | |
| 97 if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; | |
| 98 int length = is_wide ? Bytecodes::wide_length_for(bc) : Bytecodes::length_for(bc); | |
| 99 if (have_fmt != need_fmt || where + size != length) { | |
| 100 tty->print_cr("assert_constant_size %d @%d: bc=%d%s %d != %d", size, where, bc, (is_wide?"/wide":""), have_fmt, need_fmt); | |
| 101 } | |
| 102 assert(have_fmt == need_fmt, "assert_constant_size"); | |
| 103 assert(where + size == length, "assert_constant_size oob"); | |
| 104 } | |
| 105 | |
| 106 void Bytecode::assert_native_index(Bytecodes::Code bc, bool is_wide) { | |
| 107 assert((Bytecodes::flags(bc, is_wide) & Bytecodes::_fmt_has_nbo) != 0, "native index"); | |
| 108 } | |
| 109 | |
| 110 #endif //ASSERT | |
| 0 | 111 |
| 112 // Implementation of Bytecode_tableupswitch | |
| 113 | |
| 114 int Bytecode_tableswitch::dest_offset_at(int i) const { | |
| 1565 | 115 return get_Java_u4_at(aligned_offset(1 + (3 + i)*jintSize)); |
| 0 | 116 } |
| 117 | |
| 118 | |
| 119 // Implementation of Bytecode_invoke | |
| 120 | |
| 121 void Bytecode_invoke::verify() const { | |
| 122 assert(is_valid(), "check invoke"); | |
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123 assert(cpcache() != NULL, "do not call this from verifier or rewriter"); |
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124 } |
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125 |
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126 |
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127 Symbol* Bytecode_member_ref::klass() const { |
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128 return constants()->klass_ref_at_noresolve(index()); |
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129 } |
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130 |
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131 |
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132 Symbol* Bytecode_member_ref::name() const { |
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133 return constants()->name_ref_at(index()); |
| 0 | 134 } |
| 135 | |
| 136 | |
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137 Symbol* Bytecode_member_ref::signature() const { |
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138 return constants()->signature_ref_at(index()); |
| 0 | 139 } |
| 140 | |
| 141 | |
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142 BasicType Bytecode_member_ref::result_type() const { |
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143 ResultTypeFinder rts(signature()); |
| 0 | 144 rts.iterate(); |
| 145 return rts.type(); | |
| 146 } | |
| 147 | |
| 148 | |
| 149 methodHandle Bytecode_invoke::static_target(TRAPS) { | |
| 150 methodHandle m; | |
| 151 KlassHandle resolved_klass; | |
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152 constantPoolHandle constants(THREAD, this->constants()); |
| 0 | 153 |
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154 Bytecodes::Code bc = invoke_code(); |
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155 LinkResolver::resolve_method_statically(m, resolved_klass, bc, constants, index(), CHECK_(methodHandle())); |
| 0 | 156 return m; |
| 157 } | |
| 158 | |
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159 Handle Bytecode_invoke::appendix(TRAPS) { |
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160 ConstantPoolCacheEntry* cpce = cpcache_entry(); |
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161 if (cpce->has_appendix()) |
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162 return Handle(THREAD, cpce->appendix_if_resolved(constants())); |
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163 return Handle(); // usual case |
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164 } |
| 0 | 165 |
| 1602 | 166 int Bytecode_member_ref::index() const { |
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167 // Note: Rewriter::rewrite changes the Java_u2 of an invokedynamic to a native_u4, |
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168 // at the same time it allocates per-call-site CP cache entries. |
| 1602 | 169 Bytecodes::Code rawc = code(); |
| 2142 | 170 if (has_index_u4(rawc)) |
| 171 return get_index_u4(rawc); | |
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172 else |
| 2142 | 173 return get_index_u2_cpcache(rawc); |
| 0 | 174 } |
| 175 | |
| 1602 | 176 int Bytecode_member_ref::pool_index() const { |
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177 return cpcache_entry()->constant_pool_index(); |
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178 } |
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179 |
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180 ConstantPoolCacheEntry* Bytecode_member_ref::cpcache_entry() const { |
| 1602 | 181 int index = this->index(); |
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182 return cpcache()->entry_at(ConstantPool::decode_cpcache_index(index, true)); |
| 1602 | 183 } |
| 0 | 184 |
| 185 // Implementation of Bytecode_field | |
| 186 | |
| 187 void Bytecode_field::verify() const { | |
| 1602 | 188 assert(is_valid(), "check field"); |
| 0 | 189 } |
| 190 | |
| 191 | |
| 1602 | 192 // Implementation of Bytecode_loadconstant |
| 193 | |
| 194 int Bytecode_loadconstant::raw_index() const { | |
| 2142 | 195 Bytecodes::Code rawc = code(); |
| 1602 | 196 assert(rawc != Bytecodes::_wide, "verifier prevents this"); |
| 197 if (Bytecodes::java_code(rawc) == Bytecodes::_ldc) | |
| 2142 | 198 return get_index_u1(rawc); |
| 1602 | 199 else |
| 2142 | 200 return get_index_u2(rawc, false); |
| 0 | 201 } |
| 202 | |
| 1602 | 203 int Bytecode_loadconstant::pool_index() const { |
| 204 int index = raw_index(); | |
| 205 if (has_cache_index()) { | |
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206 return _method->constants()->object_to_cp_index(index); |
| 1602 | 207 } |
| 208 return index; | |
| 209 } | |
| 0 | 210 |
| 1602 | 211 BasicType Bytecode_loadconstant::result_type() const { |
| 212 int index = pool_index(); | |
| 213 constantTag tag = _method->constants()->tag_at(index); | |
| 214 return tag.basic_type(); | |
| 215 } | |
| 216 | |
| 217 oop Bytecode_loadconstant::resolve_constant(TRAPS) const { | |
| 218 assert(_method.not_null(), "must supply method to resolve constant"); | |
| 219 int index = raw_index(); | |
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220 ConstantPool* constants = _method->constants(); |
| 1602 | 221 if (has_cache_index()) { |
| 222 return constants->resolve_cached_constant_at(index, THREAD); | |
| 223 } else { | |
| 224 return constants->resolve_constant_at(index, THREAD); | |
| 1574 | 225 } |
| 0 | 226 } |
| 227 | |
| 228 //------------------------------------------------------------------------------ | |
| 229 // Non-product code | |
| 230 | |
| 231 #ifndef PRODUCT | |
| 232 | |
| 233 void Bytecode_lookupswitch::verify() const { | |
| 234 switch (Bytecodes::java_code(code())) { | |
| 235 case Bytecodes::_lookupswitch: | |
| 236 { int i = number_of_pairs() - 1; | |
| 237 while (i-- > 0) { | |
| 2142 | 238 assert(pair_at(i).match() < pair_at(i+1).match(), "unsorted table entries"); |
| 0 | 239 } |
| 240 } | |
| 241 break; | |
| 242 default: | |
| 243 fatal("not a lookupswitch bytecode"); | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 void Bytecode_tableswitch::verify() const { | |
| 248 switch (Bytecodes::java_code(code())) { | |
| 249 case Bytecodes::_tableswitch: | |
| 250 { int lo = low_key(); | |
| 251 int hi = high_key(); | |
| 252 assert (hi >= lo, "incorrect hi/lo values in tableswitch"); | |
| 253 int i = hi - lo - 1 ; | |
| 254 while (i-- > 0) { | |
| 255 // no special check needed | |
| 256 } | |
| 257 } | |
| 258 break; | |
| 259 default: | |
| 260 fatal("not a tableswitch bytecode"); | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 #endif |