Tue, 19 Oct 2010 02:52:57 -0700
6990192: VM crashes in ciTypeFlow::get_block_for()
Reviewed-by: never
duke@435 | 1 | /* |
twisti@2258 | 2 | * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_cpCacheOop.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | |
duke@435 | 29 | // Implememtation of ConstantPoolCacheEntry |
duke@435 | 30 | |
jrose@1494 | 31 | void ConstantPoolCacheEntry::initialize_entry(int index) { |
jrose@1161 | 32 | assert(0 < index && index < 0x10000, "sanity check"); |
duke@435 | 33 | _indices = index; |
jrose@1161 | 34 | assert(constant_pool_index() == index, ""); |
duke@435 | 35 | } |
duke@435 | 36 | |
jrose@1494 | 37 | void ConstantPoolCacheEntry::initialize_secondary_entry(int main_index) { |
jrose@1494 | 38 | assert(0 <= main_index && main_index < 0x10000, "sanity check"); |
jrose@1494 | 39 | _indices = (main_index << 16); |
jrose@1494 | 40 | assert(main_entry_index() == main_index, ""); |
jrose@1494 | 41 | } |
duke@435 | 42 | |
duke@435 | 43 | int ConstantPoolCacheEntry::as_flags(TosState state, bool is_final, |
duke@435 | 44 | bool is_vfinal, bool is_volatile, |
duke@435 | 45 | bool is_method_interface, bool is_method) { |
duke@435 | 46 | int f = state; |
duke@435 | 47 | |
duke@435 | 48 | assert( state < number_of_states, "Invalid state in as_flags"); |
duke@435 | 49 | |
duke@435 | 50 | f <<= 1; |
duke@435 | 51 | if (is_final) f |= 1; |
duke@435 | 52 | f <<= 1; |
duke@435 | 53 | if (is_vfinal) f |= 1; |
duke@435 | 54 | f <<= 1; |
duke@435 | 55 | if (is_volatile) f |= 1; |
duke@435 | 56 | f <<= 1; |
duke@435 | 57 | if (is_method_interface) f |= 1; |
duke@435 | 58 | f <<= 1; |
duke@435 | 59 | if (is_method) f |= 1; |
duke@435 | 60 | f <<= ConstantPoolCacheEntry::hotSwapBit; |
duke@435 | 61 | // Preserve existing flag bit values |
duke@435 | 62 | #ifdef ASSERT |
duke@435 | 63 | int old_state = ((_flags >> tosBits) & 0x0F); |
duke@435 | 64 | assert(old_state == 0 || old_state == state, |
duke@435 | 65 | "inconsistent cpCache flags state"); |
duke@435 | 66 | #endif |
duke@435 | 67 | return (_flags | f) ; |
duke@435 | 68 | } |
duke@435 | 69 | |
duke@435 | 70 | void ConstantPoolCacheEntry::set_bytecode_1(Bytecodes::Code code) { |
duke@435 | 71 | #ifdef ASSERT |
duke@435 | 72 | // Read once. |
duke@435 | 73 | volatile Bytecodes::Code c = bytecode_1(); |
duke@435 | 74 | assert(c == 0 || c == code || code == 0, "update must be consistent"); |
duke@435 | 75 | #endif |
duke@435 | 76 | // Need to flush pending stores here before bytecode is written. |
duke@435 | 77 | OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << 16)); |
duke@435 | 78 | } |
duke@435 | 79 | |
duke@435 | 80 | void ConstantPoolCacheEntry::set_bytecode_2(Bytecodes::Code code) { |
duke@435 | 81 | #ifdef ASSERT |
duke@435 | 82 | // Read once. |
duke@435 | 83 | volatile Bytecodes::Code c = bytecode_2(); |
duke@435 | 84 | assert(c == 0 || c == code || code == 0, "update must be consistent"); |
duke@435 | 85 | #endif |
duke@435 | 86 | // Need to flush pending stores here before bytecode is written. |
duke@435 | 87 | OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << 24)); |
duke@435 | 88 | } |
duke@435 | 89 | |
twisti@2258 | 90 | // Atomically sets f1 if it is still NULL, otherwise it keeps the |
twisti@2258 | 91 | // current value. |
twisti@2258 | 92 | void ConstantPoolCacheEntry::set_f1_if_null_atomic(oop f1) { |
twisti@2258 | 93 | // Use barriers as in oop_store |
twisti@2258 | 94 | HeapWord* f1_addr = (HeapWord*) &_f1; |
twisti@2258 | 95 | update_barrier_set_pre(f1_addr, f1); |
twisti@2258 | 96 | void* result = Atomic::cmpxchg_ptr(f1, f1_addr, NULL); |
twisti@2258 | 97 | bool success = (result == NULL); |
twisti@2258 | 98 | if (success) { |
twisti@2258 | 99 | update_barrier_set((void*) f1_addr, f1); |
twisti@2258 | 100 | } |
twisti@2258 | 101 | } |
twisti@2258 | 102 | |
duke@435 | 103 | #ifdef ASSERT |
duke@435 | 104 | // It is possible to have two different dummy methodOops created |
duke@435 | 105 | // when the resolve code for invoke interface executes concurrently |
duke@435 | 106 | // Hence the assertion below is weakened a bit for the invokeinterface |
duke@435 | 107 | // case. |
duke@435 | 108 | bool ConstantPoolCacheEntry::same_methodOop(oop cur_f1, oop f1) { |
duke@435 | 109 | return (cur_f1 == f1 || ((methodOop)cur_f1)->name() == |
duke@435 | 110 | ((methodOop)f1)->name() || ((methodOop)cur_f1)->signature() == |
duke@435 | 111 | ((methodOop)f1)->signature()); |
duke@435 | 112 | } |
duke@435 | 113 | #endif |
duke@435 | 114 | |
duke@435 | 115 | // Note that concurrent update of both bytecodes can leave one of them |
duke@435 | 116 | // reset to zero. This is harmless; the interpreter will simply re-resolve |
duke@435 | 117 | // the damaged entry. More seriously, the memory synchronization is needed |
duke@435 | 118 | // to flush other fields (f1, f2) completely to memory before the bytecodes |
duke@435 | 119 | // are updated, lest other processors see a non-zero bytecode but zero f1/f2. |
duke@435 | 120 | void ConstantPoolCacheEntry::set_field(Bytecodes::Code get_code, |
duke@435 | 121 | Bytecodes::Code put_code, |
duke@435 | 122 | KlassHandle field_holder, |
duke@435 | 123 | int orig_field_index, |
duke@435 | 124 | int field_offset, |
duke@435 | 125 | TosState field_type, |
duke@435 | 126 | bool is_final, |
duke@435 | 127 | bool is_volatile) { |
duke@435 | 128 | set_f1(field_holder()); |
duke@435 | 129 | set_f2(field_offset); |
duke@435 | 130 | // The field index is used by jvm/ti and is the index into fields() array |
duke@435 | 131 | // in holder instanceKlass. This is scaled by instanceKlass::next_offset. |
duke@435 | 132 | assert((orig_field_index % instanceKlass::next_offset) == 0, "wierd index"); |
duke@435 | 133 | const int field_index = orig_field_index / instanceKlass::next_offset; |
duke@435 | 134 | assert(field_index <= field_index_mask, |
duke@435 | 135 | "field index does not fit in low flag bits"); |
duke@435 | 136 | set_flags(as_flags(field_type, is_final, false, is_volatile, false, false) | |
duke@435 | 137 | (field_index & field_index_mask)); |
duke@435 | 138 | set_bytecode_1(get_code); |
duke@435 | 139 | set_bytecode_2(put_code); |
duke@435 | 140 | NOT_PRODUCT(verify(tty)); |
duke@435 | 141 | } |
duke@435 | 142 | |
duke@435 | 143 | int ConstantPoolCacheEntry::field_index() const { |
duke@435 | 144 | return (_flags & field_index_mask) * instanceKlass::next_offset; |
duke@435 | 145 | } |
duke@435 | 146 | |
duke@435 | 147 | void ConstantPoolCacheEntry::set_method(Bytecodes::Code invoke_code, |
duke@435 | 148 | methodHandle method, |
duke@435 | 149 | int vtable_index) { |
jrose@2015 | 150 | assert(!is_secondary_entry(), ""); |
duke@435 | 151 | assert(method->interpreter_entry() != NULL, "should have been set at this point"); |
duke@435 | 152 | assert(!method->is_obsolete(), "attempt to write obsolete method to cpCache"); |
duke@435 | 153 | bool change_to_virtual = (invoke_code == Bytecodes::_invokeinterface); |
duke@435 | 154 | |
duke@435 | 155 | int byte_no = -1; |
duke@435 | 156 | bool needs_vfinal_flag = false; |
duke@435 | 157 | switch (invoke_code) { |
duke@435 | 158 | case Bytecodes::_invokevirtual: |
duke@435 | 159 | case Bytecodes::_invokeinterface: { |
duke@435 | 160 | if (method->can_be_statically_bound()) { |
duke@435 | 161 | set_f2((intptr_t)method()); |
duke@435 | 162 | needs_vfinal_flag = true; |
duke@435 | 163 | } else { |
duke@435 | 164 | assert(vtable_index >= 0, "valid index"); |
duke@435 | 165 | set_f2(vtable_index); |
duke@435 | 166 | } |
duke@435 | 167 | byte_no = 2; |
duke@435 | 168 | break; |
duke@435 | 169 | } |
jrose@2015 | 170 | |
jrose@2015 | 171 | case Bytecodes::_invokedynamic: // similar to _invokevirtual |
jrose@2015 | 172 | if (TraceInvokeDynamic) { |
jrose@2015 | 173 | tty->print_cr("InvokeDynamic set_method%s method="PTR_FORMAT" index=%d", |
jrose@2015 | 174 | (is_secondary_entry() ? " secondary" : ""), |
jrose@2015 | 175 | (intptr_t)method(), vtable_index); |
jrose@2015 | 176 | method->print(); |
jrose@2015 | 177 | this->print(tty, 0); |
jrose@2015 | 178 | } |
jrose@2015 | 179 | assert(method->can_be_statically_bound(), "must be a MH invoker method"); |
jrose@2015 | 180 | assert(AllowTransitionalJSR292 || _f2 >= constantPoolOopDesc::CPCACHE_INDEX_TAG, "BSM index initialized"); |
twisti@2258 | 181 | // SystemDictionary::find_method_handle_invoke only caches |
twisti@2258 | 182 | // methods which signature classes are on the boot classpath, |
twisti@2258 | 183 | // otherwise the newly created method is returned. To avoid |
twisti@2258 | 184 | // races in that case we store the first one coming in into the |
twisti@2258 | 185 | // cp-cache atomically if it's still unset. |
twisti@2258 | 186 | set_f1_if_null_atomic(method()); |
jrose@2015 | 187 | needs_vfinal_flag = false; // _f2 is not an oop |
jrose@2015 | 188 | assert(!is_vfinal(), "f2 not an oop"); |
jrose@2017 | 189 | byte_no = 1; // coordinate this with bytecode_number & is_resolved |
jrose@2015 | 190 | break; |
jrose@2015 | 191 | |
duke@435 | 192 | case Bytecodes::_invokespecial: |
duke@435 | 193 | // Preserve the value of the vfinal flag on invokevirtual bytecode |
duke@435 | 194 | // which may be shared with this constant pool cache entry. |
duke@435 | 195 | needs_vfinal_flag = is_resolved(Bytecodes::_invokevirtual) && is_vfinal(); |
duke@435 | 196 | // fall through |
duke@435 | 197 | case Bytecodes::_invokestatic: |
duke@435 | 198 | set_f1(method()); |
duke@435 | 199 | byte_no = 1; |
duke@435 | 200 | break; |
duke@435 | 201 | default: |
duke@435 | 202 | ShouldNotReachHere(); |
duke@435 | 203 | break; |
duke@435 | 204 | } |
duke@435 | 205 | |
duke@435 | 206 | set_flags(as_flags(as_TosState(method->result_type()), |
duke@435 | 207 | method->is_final_method(), |
duke@435 | 208 | needs_vfinal_flag, |
duke@435 | 209 | false, |
duke@435 | 210 | change_to_virtual, |
duke@435 | 211 | true)| |
duke@435 | 212 | method()->size_of_parameters()); |
duke@435 | 213 | |
duke@435 | 214 | // Note: byte_no also appears in TemplateTable::resolve. |
duke@435 | 215 | if (byte_no == 1) { |
duke@435 | 216 | set_bytecode_1(invoke_code); |
duke@435 | 217 | } else if (byte_no == 2) { |
duke@435 | 218 | if (change_to_virtual) { |
duke@435 | 219 | // NOTE: THIS IS A HACK - BE VERY CAREFUL!!! |
duke@435 | 220 | // |
duke@435 | 221 | // Workaround for the case where we encounter an invokeinterface, but we |
duke@435 | 222 | // should really have an _invokevirtual since the resolved method is a |
duke@435 | 223 | // virtual method in java.lang.Object. This is a corner case in the spec |
duke@435 | 224 | // but is presumably legal. javac does not generate this code. |
duke@435 | 225 | // |
duke@435 | 226 | // We set bytecode_1() to _invokeinterface, because that is the |
duke@435 | 227 | // bytecode # used by the interpreter to see if it is resolved. |
duke@435 | 228 | // We set bytecode_2() to _invokevirtual. |
duke@435 | 229 | // See also interpreterRuntime.cpp. (8/25/2000) |
duke@435 | 230 | // Only set resolved for the invokeinterface case if method is public. |
duke@435 | 231 | // Otherwise, the method needs to be reresolved with caller for each |
duke@435 | 232 | // interface call. |
duke@435 | 233 | if (method->is_public()) set_bytecode_1(invoke_code); |
duke@435 | 234 | set_bytecode_2(Bytecodes::_invokevirtual); |
duke@435 | 235 | } else { |
duke@435 | 236 | set_bytecode_2(invoke_code); |
duke@435 | 237 | } |
duke@435 | 238 | } else { |
duke@435 | 239 | ShouldNotReachHere(); |
duke@435 | 240 | } |
duke@435 | 241 | NOT_PRODUCT(verify(tty)); |
duke@435 | 242 | } |
duke@435 | 243 | |
duke@435 | 244 | |
duke@435 | 245 | void ConstantPoolCacheEntry::set_interface_call(methodHandle method, int index) { |
jrose@2015 | 246 | assert(!is_secondary_entry(), ""); |
duke@435 | 247 | klassOop interf = method->method_holder(); |
duke@435 | 248 | assert(instanceKlass::cast(interf)->is_interface(), "must be an interface"); |
duke@435 | 249 | set_f1(interf); |
duke@435 | 250 | set_f2(index); |
duke@435 | 251 | set_flags(as_flags(as_TosState(method->result_type()), method->is_final_method(), false, false, false, true) | method()->size_of_parameters()); |
duke@435 | 252 | set_bytecode_1(Bytecodes::_invokeinterface); |
duke@435 | 253 | } |
duke@435 | 254 | |
duke@435 | 255 | |
jrose@2015 | 256 | void ConstantPoolCacheEntry::initialize_bootstrap_method_index_in_cache(int bsm_cache_index) { |
jrose@2015 | 257 | assert(!is_secondary_entry(), "only for JVM_CONSTANT_InvokeDynamic main entry"); |
jrose@2015 | 258 | assert(_f2 == 0, "initialize once"); |
jrose@2015 | 259 | assert(bsm_cache_index == (int)(u2)bsm_cache_index, "oob"); |
jrose@2015 | 260 | set_f2(bsm_cache_index + constantPoolOopDesc::CPCACHE_INDEX_TAG); |
jrose@2015 | 261 | } |
jrose@2015 | 262 | |
jrose@2015 | 263 | int ConstantPoolCacheEntry::bootstrap_method_index_in_cache() { |
jrose@2015 | 264 | assert(!is_secondary_entry(), "only for JVM_CONSTANT_InvokeDynamic main entry"); |
jrose@2015 | 265 | intptr_t bsm_cache_index = (intptr_t) _f2 - constantPoolOopDesc::CPCACHE_INDEX_TAG; |
jrose@2015 | 266 | assert(bsm_cache_index == (intptr_t)(u2)bsm_cache_index, "oob"); |
jrose@2015 | 267 | return (int) bsm_cache_index; |
jrose@2015 | 268 | } |
jrose@2015 | 269 | |
jrose@1862 | 270 | void ConstantPoolCacheEntry::set_dynamic_call(Handle call_site, |
jrose@1862 | 271 | methodHandle signature_invoker) { |
jrose@2015 | 272 | assert(is_secondary_entry(), ""); |
jrose@1862 | 273 | int param_size = signature_invoker->size_of_parameters(); |
jrose@1494 | 274 | assert(param_size >= 1, "method argument size must include MH.this"); |
jrose@1161 | 275 | param_size -= 1; // do not count MH.this; it is not stacked for invokedynamic |
jrose@1161 | 276 | if (Atomic::cmpxchg_ptr(call_site(), &_f1, NULL) == NULL) { |
jrose@1161 | 277 | // racing threads might be trying to install their own favorites |
jrose@1161 | 278 | set_f1(call_site()); |
jrose@1161 | 279 | } |
jrose@1862 | 280 | bool is_final = true; |
jrose@1862 | 281 | assert(signature_invoker->is_final_method(), "is_final"); |
jrose@1862 | 282 | set_flags(as_flags(as_TosState(signature_invoker->result_type()), is_final, false, false, false, true) | param_size); |
jrose@1161 | 283 | // do not do set_bytecode on a secondary CP cache entry |
jrose@1161 | 284 | //set_bytecode_1(Bytecodes::_invokedynamic); |
jrose@1161 | 285 | } |
jrose@1161 | 286 | |
jrose@1161 | 287 | |
duke@435 | 288 | class LocalOopClosure: public OopClosure { |
duke@435 | 289 | private: |
duke@435 | 290 | void (*_f)(oop*); |
duke@435 | 291 | |
duke@435 | 292 | public: |
duke@435 | 293 | LocalOopClosure(void f(oop*)) { _f = f; } |
duke@435 | 294 | virtual void do_oop(oop* o) { _f(o); } |
coleenp@548 | 295 | virtual void do_oop(narrowOop *o) { ShouldNotReachHere(); } |
duke@435 | 296 | }; |
duke@435 | 297 | |
duke@435 | 298 | |
duke@435 | 299 | void ConstantPoolCacheEntry::oops_do(void f(oop*)) { |
duke@435 | 300 | LocalOopClosure blk(f); |
duke@435 | 301 | oop_iterate(&blk); |
duke@435 | 302 | } |
duke@435 | 303 | |
duke@435 | 304 | |
duke@435 | 305 | void ConstantPoolCacheEntry::oop_iterate(OopClosure* blk) { |
duke@435 | 306 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 307 | // field[1] is always oop or NULL |
duke@435 | 308 | blk->do_oop((oop*)&_f1); |
duke@435 | 309 | if (is_vfinal()) { |
duke@435 | 310 | blk->do_oop((oop*)&_f2); |
duke@435 | 311 | } |
duke@435 | 312 | } |
duke@435 | 313 | |
duke@435 | 314 | |
duke@435 | 315 | void ConstantPoolCacheEntry::oop_iterate_m(OopClosure* blk, MemRegion mr) { |
duke@435 | 316 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 317 | // field[1] is always oop or NULL |
duke@435 | 318 | if (mr.contains((oop *)&_f1)) blk->do_oop((oop*)&_f1); |
duke@435 | 319 | if (is_vfinal()) { |
duke@435 | 320 | if (mr.contains((oop *)&_f2)) blk->do_oop((oop*)&_f2); |
duke@435 | 321 | } |
duke@435 | 322 | } |
duke@435 | 323 | |
duke@435 | 324 | |
duke@435 | 325 | void ConstantPoolCacheEntry::follow_contents() { |
duke@435 | 326 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 327 | // field[1] is always oop or NULL |
duke@435 | 328 | MarkSweep::mark_and_push((oop*)&_f1); |
duke@435 | 329 | if (is_vfinal()) { |
duke@435 | 330 | MarkSweep::mark_and_push((oop*)&_f2); |
duke@435 | 331 | } |
duke@435 | 332 | } |
duke@435 | 333 | |
duke@435 | 334 | #ifndef SERIALGC |
duke@435 | 335 | void ConstantPoolCacheEntry::follow_contents(ParCompactionManager* cm) { |
duke@435 | 336 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 337 | // field[1] is always oop or NULL |
duke@435 | 338 | PSParallelCompact::mark_and_push(cm, (oop*)&_f1); |
duke@435 | 339 | if (is_vfinal()) { |
duke@435 | 340 | PSParallelCompact::mark_and_push(cm, (oop*)&_f2); |
duke@435 | 341 | } |
duke@435 | 342 | } |
duke@435 | 343 | #endif // SERIALGC |
duke@435 | 344 | |
duke@435 | 345 | void ConstantPoolCacheEntry::adjust_pointers() { |
duke@435 | 346 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 347 | // field[1] is always oop or NULL |
duke@435 | 348 | MarkSweep::adjust_pointer((oop*)&_f1); |
duke@435 | 349 | if (is_vfinal()) { |
duke@435 | 350 | MarkSweep::adjust_pointer((oop*)&_f2); |
duke@435 | 351 | } |
duke@435 | 352 | } |
duke@435 | 353 | |
duke@435 | 354 | #ifndef SERIALGC |
duke@435 | 355 | void ConstantPoolCacheEntry::update_pointers() { |
duke@435 | 356 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 357 | // field[1] is always oop or NULL |
duke@435 | 358 | PSParallelCompact::adjust_pointer((oop*)&_f1); |
duke@435 | 359 | if (is_vfinal()) { |
duke@435 | 360 | PSParallelCompact::adjust_pointer((oop*)&_f2); |
duke@435 | 361 | } |
duke@435 | 362 | } |
duke@435 | 363 | |
duke@435 | 364 | void ConstantPoolCacheEntry::update_pointers(HeapWord* beg_addr, |
duke@435 | 365 | HeapWord* end_addr) { |
duke@435 | 366 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 367 | // field[1] is always oop or NULL |
duke@435 | 368 | PSParallelCompact::adjust_pointer((oop*)&_f1, beg_addr, end_addr); |
duke@435 | 369 | if (is_vfinal()) { |
duke@435 | 370 | PSParallelCompact::adjust_pointer((oop*)&_f2, beg_addr, end_addr); |
duke@435 | 371 | } |
duke@435 | 372 | } |
duke@435 | 373 | #endif // SERIALGC |
duke@435 | 374 | |
duke@435 | 375 | // RedefineClasses() API support: |
duke@435 | 376 | // If this constantPoolCacheEntry refers to old_method then update it |
duke@435 | 377 | // to refer to new_method. |
duke@435 | 378 | bool ConstantPoolCacheEntry::adjust_method_entry(methodOop old_method, |
duke@435 | 379 | methodOop new_method, bool * trace_name_printed) { |
duke@435 | 380 | |
duke@435 | 381 | if (is_vfinal()) { |
duke@435 | 382 | // virtual and final so f2() contains method ptr instead of vtable index |
duke@435 | 383 | if (f2() == (intptr_t)old_method) { |
duke@435 | 384 | // match old_method so need an update |
duke@435 | 385 | _f2 = (intptr_t)new_method; |
duke@435 | 386 | if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
duke@435 | 387 | if (!(*trace_name_printed)) { |
duke@435 | 388 | // RC_TRACE_MESG macro has an embedded ResourceMark |
duke@435 | 389 | RC_TRACE_MESG(("adjust: name=%s", |
duke@435 | 390 | Klass::cast(old_method->method_holder())->external_name())); |
duke@435 | 391 | *trace_name_printed = true; |
duke@435 | 392 | } |
duke@435 | 393 | // RC_TRACE macro has an embedded ResourceMark |
duke@435 | 394 | RC_TRACE(0x00400000, ("cpc vf-entry update: %s(%s)", |
duke@435 | 395 | new_method->name()->as_C_string(), |
duke@435 | 396 | new_method->signature()->as_C_string())); |
duke@435 | 397 | } |
duke@435 | 398 | |
duke@435 | 399 | return true; |
duke@435 | 400 | } |
duke@435 | 401 | |
duke@435 | 402 | // f1() is not used with virtual entries so bail out |
duke@435 | 403 | return false; |
duke@435 | 404 | } |
duke@435 | 405 | |
duke@435 | 406 | if ((oop)_f1 == NULL) { |
duke@435 | 407 | // NULL f1() means this is a virtual entry so bail out |
duke@435 | 408 | // We are assuming that the vtable index does not need change. |
duke@435 | 409 | return false; |
duke@435 | 410 | } |
duke@435 | 411 | |
duke@435 | 412 | if ((oop)_f1 == old_method) { |
duke@435 | 413 | _f1 = new_method; |
duke@435 | 414 | if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
duke@435 | 415 | if (!(*trace_name_printed)) { |
duke@435 | 416 | // RC_TRACE_MESG macro has an embedded ResourceMark |
duke@435 | 417 | RC_TRACE_MESG(("adjust: name=%s", |
duke@435 | 418 | Klass::cast(old_method->method_holder())->external_name())); |
duke@435 | 419 | *trace_name_printed = true; |
duke@435 | 420 | } |
duke@435 | 421 | // RC_TRACE macro has an embedded ResourceMark |
duke@435 | 422 | RC_TRACE(0x00400000, ("cpc entry update: %s(%s)", |
duke@435 | 423 | new_method->name()->as_C_string(), |
duke@435 | 424 | new_method->signature()->as_C_string())); |
duke@435 | 425 | } |
duke@435 | 426 | |
duke@435 | 427 | return true; |
duke@435 | 428 | } |
duke@435 | 429 | |
duke@435 | 430 | return false; |
duke@435 | 431 | } |
duke@435 | 432 | |
duke@435 | 433 | bool ConstantPoolCacheEntry::is_interesting_method_entry(klassOop k) { |
duke@435 | 434 | if (!is_method_entry()) { |
duke@435 | 435 | // not a method entry so not interesting by default |
duke@435 | 436 | return false; |
duke@435 | 437 | } |
duke@435 | 438 | |
duke@435 | 439 | methodOop m = NULL; |
duke@435 | 440 | if (is_vfinal()) { |
duke@435 | 441 | // virtual and final so _f2 contains method ptr instead of vtable index |
duke@435 | 442 | m = (methodOop)_f2; |
duke@435 | 443 | } else if ((oop)_f1 == NULL) { |
duke@435 | 444 | // NULL _f1 means this is a virtual entry so also not interesting |
duke@435 | 445 | return false; |
duke@435 | 446 | } else { |
duke@435 | 447 | if (!((oop)_f1)->is_method()) { |
duke@435 | 448 | // _f1 can also contain a klassOop for an interface |
duke@435 | 449 | return false; |
duke@435 | 450 | } |
duke@435 | 451 | m = (methodOop)_f1; |
duke@435 | 452 | } |
duke@435 | 453 | |
duke@435 | 454 | assert(m != NULL && m->is_method(), "sanity check"); |
duke@435 | 455 | if (m == NULL || !m->is_method() || m->method_holder() != k) { |
duke@435 | 456 | // robustness for above sanity checks or method is not in |
duke@435 | 457 | // the interesting class |
duke@435 | 458 | return false; |
duke@435 | 459 | } |
duke@435 | 460 | |
duke@435 | 461 | // the method is in the interesting class so the entry is interesting |
duke@435 | 462 | return true; |
duke@435 | 463 | } |
duke@435 | 464 | |
duke@435 | 465 | void ConstantPoolCacheEntry::print(outputStream* st, int index) const { |
duke@435 | 466 | // print separator |
duke@435 | 467 | if (index == 0) tty->print_cr(" -------------"); |
duke@435 | 468 | // print entry |
jrose@2015 | 469 | tty->print("%3d ("PTR_FORMAT") ", index, (intptr_t)this); |
jrose@1161 | 470 | if (is_secondary_entry()) |
jrose@1161 | 471 | tty->print_cr("[%5d|secondary]", main_entry_index()); |
jrose@1161 | 472 | else |
jrose@1161 | 473 | tty->print_cr("[%02x|%02x|%5d]", bytecode_2(), bytecode_1(), constant_pool_index()); |
jrose@2015 | 474 | tty->print_cr(" [ "PTR_FORMAT"]", (intptr_t)(oop)_f1); |
jrose@2015 | 475 | tty->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_f2); |
jrose@2015 | 476 | tty->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_flags); |
duke@435 | 477 | tty->print_cr(" -------------"); |
duke@435 | 478 | } |
duke@435 | 479 | |
duke@435 | 480 | void ConstantPoolCacheEntry::verify(outputStream* st) const { |
duke@435 | 481 | // not implemented yet |
duke@435 | 482 | } |
duke@435 | 483 | |
duke@435 | 484 | // Implementation of ConstantPoolCache |
duke@435 | 485 | |
duke@435 | 486 | void constantPoolCacheOopDesc::initialize(intArray& inverse_index_map) { |
duke@435 | 487 | assert(inverse_index_map.length() == length(), "inverse index map must have same length as cache"); |
jrose@1494 | 488 | for (int i = 0; i < length(); i++) { |
jrose@1494 | 489 | ConstantPoolCacheEntry* e = entry_at(i); |
jrose@1494 | 490 | int original_index = inverse_index_map[i]; |
jrose@1494 | 491 | if ((original_index & Rewriter::_secondary_entry_tag) != 0) { |
jrose@1494 | 492 | int main_index = (original_index - Rewriter::_secondary_entry_tag); |
jrose@1494 | 493 | assert(!entry_at(main_index)->is_secondary_entry(), "valid main index"); |
jrose@1494 | 494 | e->initialize_secondary_entry(main_index); |
jrose@1494 | 495 | } else { |
jrose@1494 | 496 | e->initialize_entry(original_index); |
jrose@1494 | 497 | } |
jrose@1494 | 498 | assert(entry_at(i) == e, "sanity"); |
jrose@1494 | 499 | } |
duke@435 | 500 | } |
duke@435 | 501 | |
duke@435 | 502 | // RedefineClasses() API support: |
duke@435 | 503 | // If any entry of this constantPoolCache points to any of |
duke@435 | 504 | // old_methods, replace it with the corresponding new_method. |
duke@435 | 505 | void constantPoolCacheOopDesc::adjust_method_entries(methodOop* old_methods, methodOop* new_methods, |
duke@435 | 506 | int methods_length, bool * trace_name_printed) { |
duke@435 | 507 | |
duke@435 | 508 | if (methods_length == 0) { |
duke@435 | 509 | // nothing to do if there are no methods |
duke@435 | 510 | return; |
duke@435 | 511 | } |
duke@435 | 512 | |
duke@435 | 513 | // get shorthand for the interesting class |
duke@435 | 514 | klassOop old_holder = old_methods[0]->method_holder(); |
duke@435 | 515 | |
duke@435 | 516 | for (int i = 0; i < length(); i++) { |
duke@435 | 517 | if (!entry_at(i)->is_interesting_method_entry(old_holder)) { |
duke@435 | 518 | // skip uninteresting methods |
duke@435 | 519 | continue; |
duke@435 | 520 | } |
duke@435 | 521 | |
duke@435 | 522 | // The constantPoolCache contains entries for several different |
duke@435 | 523 | // things, but we only care about methods. In fact, we only care |
duke@435 | 524 | // about methods in the same class as the one that contains the |
duke@435 | 525 | // old_methods. At this point, we have an interesting entry. |
duke@435 | 526 | |
duke@435 | 527 | for (int j = 0; j < methods_length; j++) { |
duke@435 | 528 | methodOop old_method = old_methods[j]; |
duke@435 | 529 | methodOop new_method = new_methods[j]; |
duke@435 | 530 | |
duke@435 | 531 | if (entry_at(i)->adjust_method_entry(old_method, new_method, |
duke@435 | 532 | trace_name_printed)) { |
duke@435 | 533 | // current old_method matched this entry and we updated it so |
duke@435 | 534 | // break out and get to the next interesting entry if there one |
duke@435 | 535 | break; |
duke@435 | 536 | } |
duke@435 | 537 | } |
duke@435 | 538 | } |
duke@435 | 539 | } |