Tue, 15 Nov 2011 20:17:33 +0100
7110152: assert(size_in_words <= (julong)max_jint) failed: no overflow
Summary: Reduce what arrayOopDesc::max_array_length() returns to avoid int overflow
Reviewed-by: kvn, dholmes, tonyp
duke@435 | 1 | /* |
stefank@2534 | 2 | * Copyright (c) 1998, 2011, 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 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "gc_implementation/shared/markSweep.inline.hpp" |
stefank@2314 | 27 | #include "interpreter/interpreter.hpp" |
stefank@2314 | 28 | #include "interpreter/rewriter.hpp" |
stefank@2314 | 29 | #include "memory/universe.inline.hpp" |
stefank@2314 | 30 | #include "oops/cpCacheOop.hpp" |
stefank@2314 | 31 | #include "oops/objArrayOop.hpp" |
stefank@2314 | 32 | #include "oops/oop.inline.hpp" |
stefank@2314 | 33 | #include "prims/jvmtiRedefineClassesTrace.hpp" |
stefank@2314 | 34 | #include "runtime/handles.inline.hpp" |
duke@435 | 35 | |
duke@435 | 36 | |
duke@435 | 37 | // Implememtation of ConstantPoolCacheEntry |
duke@435 | 38 | |
jrose@1494 | 39 | void ConstantPoolCacheEntry::initialize_entry(int index) { |
jrose@1161 | 40 | assert(0 < index && index < 0x10000, "sanity check"); |
duke@435 | 41 | _indices = index; |
jrose@1161 | 42 | assert(constant_pool_index() == index, ""); |
duke@435 | 43 | } |
duke@435 | 44 | |
jrose@1494 | 45 | void ConstantPoolCacheEntry::initialize_secondary_entry(int main_index) { |
jrose@1494 | 46 | assert(0 <= main_index && main_index < 0x10000, "sanity check"); |
jrose@1494 | 47 | _indices = (main_index << 16); |
jrose@1494 | 48 | assert(main_entry_index() == main_index, ""); |
jrose@1494 | 49 | } |
duke@435 | 50 | |
duke@435 | 51 | int ConstantPoolCacheEntry::as_flags(TosState state, bool is_final, |
duke@435 | 52 | bool is_vfinal, bool is_volatile, |
duke@435 | 53 | bool is_method_interface, bool is_method) { |
duke@435 | 54 | int f = state; |
duke@435 | 55 | |
duke@435 | 56 | assert( state < number_of_states, "Invalid state in as_flags"); |
duke@435 | 57 | |
duke@435 | 58 | f <<= 1; |
duke@435 | 59 | if (is_final) f |= 1; |
duke@435 | 60 | f <<= 1; |
duke@435 | 61 | if (is_vfinal) f |= 1; |
duke@435 | 62 | f <<= 1; |
duke@435 | 63 | if (is_volatile) f |= 1; |
duke@435 | 64 | f <<= 1; |
duke@435 | 65 | if (is_method_interface) f |= 1; |
duke@435 | 66 | f <<= 1; |
duke@435 | 67 | if (is_method) f |= 1; |
duke@435 | 68 | f <<= ConstantPoolCacheEntry::hotSwapBit; |
duke@435 | 69 | // Preserve existing flag bit values |
duke@435 | 70 | #ifdef ASSERT |
duke@435 | 71 | int old_state = ((_flags >> tosBits) & 0x0F); |
duke@435 | 72 | assert(old_state == 0 || old_state == state, |
duke@435 | 73 | "inconsistent cpCache flags state"); |
duke@435 | 74 | #endif |
duke@435 | 75 | return (_flags | f) ; |
duke@435 | 76 | } |
duke@435 | 77 | |
duke@435 | 78 | void ConstantPoolCacheEntry::set_bytecode_1(Bytecodes::Code code) { |
duke@435 | 79 | #ifdef ASSERT |
duke@435 | 80 | // Read once. |
duke@435 | 81 | volatile Bytecodes::Code c = bytecode_1(); |
duke@435 | 82 | assert(c == 0 || c == code || code == 0, "update must be consistent"); |
duke@435 | 83 | #endif |
duke@435 | 84 | // Need to flush pending stores here before bytecode is written. |
duke@435 | 85 | OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << 16)); |
duke@435 | 86 | } |
duke@435 | 87 | |
duke@435 | 88 | void ConstantPoolCacheEntry::set_bytecode_2(Bytecodes::Code code) { |
duke@435 | 89 | #ifdef ASSERT |
duke@435 | 90 | // Read once. |
duke@435 | 91 | volatile Bytecodes::Code c = bytecode_2(); |
duke@435 | 92 | assert(c == 0 || c == code || code == 0, "update must be consistent"); |
duke@435 | 93 | #endif |
duke@435 | 94 | // Need to flush pending stores here before bytecode is written. |
duke@435 | 95 | OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << 24)); |
duke@435 | 96 | } |
duke@435 | 97 | |
twisti@2258 | 98 | // Atomically sets f1 if it is still NULL, otherwise it keeps the |
twisti@2258 | 99 | // current value. |
twisti@2258 | 100 | void ConstantPoolCacheEntry::set_f1_if_null_atomic(oop f1) { |
twisti@2553 | 101 | // Use barriers as in oop_store |
twisti@2553 | 102 | oop* f1_addr = (oop*) &_f1; |
twisti@2553 | 103 | update_barrier_set_pre(f1_addr, f1); |
twisti@2553 | 104 | void* result = Atomic::cmpxchg_ptr(f1, f1_addr, NULL); |
twisti@2553 | 105 | bool success = (result == NULL); |
twisti@2553 | 106 | if (success) { |
twisti@2811 | 107 | update_barrier_set((void*) f1_addr, f1); |
twisti@2258 | 108 | } |
twisti@2553 | 109 | } |
twisti@2258 | 110 | |
duke@435 | 111 | #ifdef ASSERT |
duke@435 | 112 | // It is possible to have two different dummy methodOops created |
duke@435 | 113 | // when the resolve code for invoke interface executes concurrently |
duke@435 | 114 | // Hence the assertion below is weakened a bit for the invokeinterface |
duke@435 | 115 | // case. |
duke@435 | 116 | bool ConstantPoolCacheEntry::same_methodOop(oop cur_f1, oop f1) { |
duke@435 | 117 | return (cur_f1 == f1 || ((methodOop)cur_f1)->name() == |
duke@435 | 118 | ((methodOop)f1)->name() || ((methodOop)cur_f1)->signature() == |
duke@435 | 119 | ((methodOop)f1)->signature()); |
duke@435 | 120 | } |
duke@435 | 121 | #endif |
duke@435 | 122 | |
duke@435 | 123 | // Note that concurrent update of both bytecodes can leave one of them |
duke@435 | 124 | // reset to zero. This is harmless; the interpreter will simply re-resolve |
duke@435 | 125 | // the damaged entry. More seriously, the memory synchronization is needed |
duke@435 | 126 | // to flush other fields (f1, f2) completely to memory before the bytecodes |
duke@435 | 127 | // are updated, lest other processors see a non-zero bytecode but zero f1/f2. |
duke@435 | 128 | void ConstantPoolCacheEntry::set_field(Bytecodes::Code get_code, |
duke@435 | 129 | Bytecodes::Code put_code, |
duke@435 | 130 | KlassHandle field_holder, |
never@3137 | 131 | int field_index, |
duke@435 | 132 | int field_offset, |
duke@435 | 133 | TosState field_type, |
duke@435 | 134 | bool is_final, |
duke@435 | 135 | bool is_volatile) { |
never@2658 | 136 | set_f1(field_holder()->java_mirror()); |
duke@435 | 137 | set_f2(field_offset); |
duke@435 | 138 | assert(field_index <= field_index_mask, |
duke@435 | 139 | "field index does not fit in low flag bits"); |
duke@435 | 140 | set_flags(as_flags(field_type, is_final, false, is_volatile, false, false) | |
duke@435 | 141 | (field_index & field_index_mask)); |
duke@435 | 142 | set_bytecode_1(get_code); |
duke@435 | 143 | set_bytecode_2(put_code); |
duke@435 | 144 | NOT_PRODUCT(verify(tty)); |
duke@435 | 145 | } |
duke@435 | 146 | |
duke@435 | 147 | int ConstantPoolCacheEntry::field_index() const { |
never@3137 | 148 | return (_flags & field_index_mask); |
duke@435 | 149 | } |
duke@435 | 150 | |
duke@435 | 151 | void ConstantPoolCacheEntry::set_method(Bytecodes::Code invoke_code, |
duke@435 | 152 | methodHandle method, |
duke@435 | 153 | int vtable_index) { |
jrose@2015 | 154 | assert(!is_secondary_entry(), ""); |
duke@435 | 155 | assert(method->interpreter_entry() != NULL, "should have been set at this point"); |
duke@435 | 156 | assert(!method->is_obsolete(), "attempt to write obsolete method to cpCache"); |
duke@435 | 157 | bool change_to_virtual = (invoke_code == Bytecodes::_invokeinterface); |
duke@435 | 158 | |
duke@435 | 159 | int byte_no = -1; |
duke@435 | 160 | bool needs_vfinal_flag = false; |
duke@435 | 161 | switch (invoke_code) { |
duke@435 | 162 | case Bytecodes::_invokevirtual: |
duke@435 | 163 | case Bytecodes::_invokeinterface: { |
duke@435 | 164 | if (method->can_be_statically_bound()) { |
duke@435 | 165 | set_f2((intptr_t)method()); |
duke@435 | 166 | needs_vfinal_flag = true; |
duke@435 | 167 | } else { |
duke@435 | 168 | assert(vtable_index >= 0, "valid index"); |
duke@435 | 169 | set_f2(vtable_index); |
duke@435 | 170 | } |
duke@435 | 171 | byte_no = 2; |
duke@435 | 172 | break; |
duke@435 | 173 | } |
jrose@2015 | 174 | |
jrose@2015 | 175 | case Bytecodes::_invokedynamic: // similar to _invokevirtual |
jrose@2015 | 176 | if (TraceInvokeDynamic) { |
jrose@2015 | 177 | tty->print_cr("InvokeDynamic set_method%s method="PTR_FORMAT" index=%d", |
jrose@2015 | 178 | (is_secondary_entry() ? " secondary" : ""), |
jrose@2015 | 179 | (intptr_t)method(), vtable_index); |
jrose@2015 | 180 | method->print(); |
jrose@2015 | 181 | this->print(tty, 0); |
jrose@2015 | 182 | } |
jrose@2015 | 183 | assert(method->can_be_statically_bound(), "must be a MH invoker method"); |
jrose@2742 | 184 | assert(_f2 >= constantPoolOopDesc::CPCACHE_INDEX_TAG, "BSM index initialized"); |
twisti@2258 | 185 | // SystemDictionary::find_method_handle_invoke only caches |
twisti@2258 | 186 | // methods which signature classes are on the boot classpath, |
twisti@2258 | 187 | // otherwise the newly created method is returned. To avoid |
twisti@2258 | 188 | // races in that case we store the first one coming in into the |
twisti@2258 | 189 | // cp-cache atomically if it's still unset. |
twisti@2258 | 190 | set_f1_if_null_atomic(method()); |
jrose@2015 | 191 | needs_vfinal_flag = false; // _f2 is not an oop |
jrose@2015 | 192 | assert(!is_vfinal(), "f2 not an oop"); |
jrose@2017 | 193 | byte_no = 1; // coordinate this with bytecode_number & is_resolved |
jrose@2015 | 194 | break; |
jrose@2015 | 195 | |
duke@435 | 196 | case Bytecodes::_invokespecial: |
duke@435 | 197 | // Preserve the value of the vfinal flag on invokevirtual bytecode |
duke@435 | 198 | // which may be shared with this constant pool cache entry. |
duke@435 | 199 | needs_vfinal_flag = is_resolved(Bytecodes::_invokevirtual) && is_vfinal(); |
duke@435 | 200 | // fall through |
duke@435 | 201 | case Bytecodes::_invokestatic: |
duke@435 | 202 | set_f1(method()); |
duke@435 | 203 | byte_no = 1; |
duke@435 | 204 | break; |
duke@435 | 205 | default: |
duke@435 | 206 | ShouldNotReachHere(); |
duke@435 | 207 | break; |
duke@435 | 208 | } |
duke@435 | 209 | |
duke@435 | 210 | set_flags(as_flags(as_TosState(method->result_type()), |
duke@435 | 211 | method->is_final_method(), |
duke@435 | 212 | needs_vfinal_flag, |
duke@435 | 213 | false, |
duke@435 | 214 | change_to_virtual, |
duke@435 | 215 | true)| |
duke@435 | 216 | method()->size_of_parameters()); |
duke@435 | 217 | |
duke@435 | 218 | // Note: byte_no also appears in TemplateTable::resolve. |
duke@435 | 219 | if (byte_no == 1) { |
duke@435 | 220 | set_bytecode_1(invoke_code); |
duke@435 | 221 | } else if (byte_no == 2) { |
duke@435 | 222 | if (change_to_virtual) { |
duke@435 | 223 | // NOTE: THIS IS A HACK - BE VERY CAREFUL!!! |
duke@435 | 224 | // |
duke@435 | 225 | // Workaround for the case where we encounter an invokeinterface, but we |
duke@435 | 226 | // should really have an _invokevirtual since the resolved method is a |
duke@435 | 227 | // virtual method in java.lang.Object. This is a corner case in the spec |
duke@435 | 228 | // but is presumably legal. javac does not generate this code. |
duke@435 | 229 | // |
duke@435 | 230 | // We set bytecode_1() to _invokeinterface, because that is the |
duke@435 | 231 | // bytecode # used by the interpreter to see if it is resolved. |
duke@435 | 232 | // We set bytecode_2() to _invokevirtual. |
duke@435 | 233 | // See also interpreterRuntime.cpp. (8/25/2000) |
duke@435 | 234 | // Only set resolved for the invokeinterface case if method is public. |
duke@435 | 235 | // Otherwise, the method needs to be reresolved with caller for each |
duke@435 | 236 | // interface call. |
duke@435 | 237 | if (method->is_public()) set_bytecode_1(invoke_code); |
duke@435 | 238 | set_bytecode_2(Bytecodes::_invokevirtual); |
duke@435 | 239 | } else { |
duke@435 | 240 | set_bytecode_2(invoke_code); |
duke@435 | 241 | } |
duke@435 | 242 | } else { |
duke@435 | 243 | ShouldNotReachHere(); |
duke@435 | 244 | } |
duke@435 | 245 | NOT_PRODUCT(verify(tty)); |
duke@435 | 246 | } |
duke@435 | 247 | |
duke@435 | 248 | |
duke@435 | 249 | void ConstantPoolCacheEntry::set_interface_call(methodHandle method, int index) { |
jrose@2015 | 250 | assert(!is_secondary_entry(), ""); |
duke@435 | 251 | klassOop interf = method->method_holder(); |
duke@435 | 252 | assert(instanceKlass::cast(interf)->is_interface(), "must be an interface"); |
duke@435 | 253 | set_f1(interf); |
duke@435 | 254 | set_f2(index); |
duke@435 | 255 | set_flags(as_flags(as_TosState(method->result_type()), method->is_final_method(), false, false, false, true) | method()->size_of_parameters()); |
duke@435 | 256 | set_bytecode_1(Bytecodes::_invokeinterface); |
duke@435 | 257 | } |
duke@435 | 258 | |
duke@435 | 259 | |
jrose@2015 | 260 | void ConstantPoolCacheEntry::initialize_bootstrap_method_index_in_cache(int bsm_cache_index) { |
jrose@2015 | 261 | assert(!is_secondary_entry(), "only for JVM_CONSTANT_InvokeDynamic main entry"); |
jrose@2015 | 262 | assert(_f2 == 0, "initialize once"); |
jrose@2015 | 263 | assert(bsm_cache_index == (int)(u2)bsm_cache_index, "oob"); |
jrose@2015 | 264 | set_f2(bsm_cache_index + constantPoolOopDesc::CPCACHE_INDEX_TAG); |
jrose@2015 | 265 | } |
jrose@2015 | 266 | |
jrose@2015 | 267 | int ConstantPoolCacheEntry::bootstrap_method_index_in_cache() { |
jrose@2015 | 268 | assert(!is_secondary_entry(), "only for JVM_CONSTANT_InvokeDynamic main entry"); |
jrose@2015 | 269 | intptr_t bsm_cache_index = (intptr_t) _f2 - constantPoolOopDesc::CPCACHE_INDEX_TAG; |
jrose@2015 | 270 | assert(bsm_cache_index == (intptr_t)(u2)bsm_cache_index, "oob"); |
jrose@2015 | 271 | return (int) bsm_cache_index; |
jrose@2015 | 272 | } |
jrose@2015 | 273 | |
twisti@2811 | 274 | void ConstantPoolCacheEntry::set_dynamic_call(Handle call_site, methodHandle signature_invoker) { |
jrose@2015 | 275 | assert(is_secondary_entry(), ""); |
twisti@2811 | 276 | // NOTE: it's important that all other values are set before f1 is |
twisti@2811 | 277 | // set since some users short circuit on f1 being set |
twisti@2811 | 278 | // (i.e. non-null) and that may result in uninitialized values for |
twisti@2811 | 279 | // other racing threads (e.g. flags). |
jrose@1862 | 280 | int param_size = signature_invoker->size_of_parameters(); |
jrose@1494 | 281 | assert(param_size >= 1, "method argument size must include MH.this"); |
twisti@2811 | 282 | param_size -= 1; // do not count MH.this; it is not stacked for invokedynamic |
jrose@1862 | 283 | bool is_final = true; |
jrose@1862 | 284 | assert(signature_invoker->is_final_method(), "is_final"); |
twisti@2811 | 285 | int flags = as_flags(as_TosState(signature_invoker->result_type()), is_final, false, false, false, true) | param_size; |
twisti@2811 | 286 | assert(_flags == 0 || _flags == flags, "flags should be the same"); |
twisti@2811 | 287 | set_flags(flags); |
jrose@1161 | 288 | // do not do set_bytecode on a secondary CP cache entry |
jrose@1161 | 289 | //set_bytecode_1(Bytecodes::_invokedynamic); |
twisti@2811 | 290 | set_f1_if_null_atomic(call_site()); // This must be the last one to set (see NOTE above)! |
jrose@1161 | 291 | } |
jrose@1161 | 292 | |
jrose@1161 | 293 | |
jrose@2982 | 294 | methodOop ConstantPoolCacheEntry::get_method_if_resolved(Bytecodes::Code invoke_code, constantPoolHandle cpool) { |
jrose@2982 | 295 | assert(invoke_code > (Bytecodes::Code)0, "bad query"); |
jrose@2982 | 296 | if (is_secondary_entry()) { |
jrose@2982 | 297 | return cpool->cache()->entry_at(main_entry_index())->get_method_if_resolved(invoke_code, cpool); |
jrose@2982 | 298 | } |
jrose@2982 | 299 | // Decode the action of set_method and set_interface_call |
jrose@2982 | 300 | if (bytecode_1() == invoke_code) { |
jrose@2982 | 301 | oop f1 = _f1; |
jrose@2982 | 302 | if (f1 != NULL) { |
jrose@2982 | 303 | switch (invoke_code) { |
jrose@2982 | 304 | case Bytecodes::_invokeinterface: |
jrose@2982 | 305 | assert(f1->is_klass(), ""); |
jrose@2982 | 306 | return klassItable::method_for_itable_index(klassOop(f1), (int) f2()); |
jrose@2982 | 307 | case Bytecodes::_invokestatic: |
jrose@2982 | 308 | case Bytecodes::_invokespecial: |
jrose@2982 | 309 | assert(f1->is_method(), ""); |
jrose@2982 | 310 | return methodOop(f1); |
jrose@2982 | 311 | } |
jrose@2982 | 312 | } |
jrose@2982 | 313 | } |
jrose@2982 | 314 | if (bytecode_2() == invoke_code) { |
jrose@2982 | 315 | switch (invoke_code) { |
jrose@2982 | 316 | case Bytecodes::_invokevirtual: |
jrose@2982 | 317 | if (is_vfinal()) { |
jrose@2982 | 318 | // invokevirtual |
jrose@2982 | 319 | methodOop m = methodOop((intptr_t) f2()); |
jrose@2982 | 320 | assert(m->is_method(), ""); |
jrose@2982 | 321 | return m; |
jrose@2982 | 322 | } else { |
jrose@2982 | 323 | int holder_index = cpool->uncached_klass_ref_index_at(constant_pool_index()); |
jrose@2982 | 324 | if (cpool->tag_at(holder_index).is_klass()) { |
jrose@2982 | 325 | klassOop klass = cpool->resolved_klass_at(holder_index); |
jrose@2982 | 326 | if (!Klass::cast(klass)->oop_is_instance()) |
jrose@2982 | 327 | klass = SystemDictionary::Object_klass(); |
jrose@2982 | 328 | return instanceKlass::cast(klass)->method_at_vtable((int) f2()); |
jrose@2982 | 329 | } |
jrose@2982 | 330 | } |
jrose@2982 | 331 | } |
jrose@2982 | 332 | } |
jrose@2982 | 333 | return NULL; |
jrose@2982 | 334 | } |
jrose@2982 | 335 | |
jrose@2982 | 336 | |
jrose@2982 | 337 | |
duke@435 | 338 | class LocalOopClosure: public OopClosure { |
duke@435 | 339 | private: |
duke@435 | 340 | void (*_f)(oop*); |
duke@435 | 341 | |
duke@435 | 342 | public: |
duke@435 | 343 | LocalOopClosure(void f(oop*)) { _f = f; } |
duke@435 | 344 | virtual void do_oop(oop* o) { _f(o); } |
coleenp@548 | 345 | virtual void do_oop(narrowOop *o) { ShouldNotReachHere(); } |
duke@435 | 346 | }; |
duke@435 | 347 | |
duke@435 | 348 | |
duke@435 | 349 | void ConstantPoolCacheEntry::oops_do(void f(oop*)) { |
duke@435 | 350 | LocalOopClosure blk(f); |
duke@435 | 351 | oop_iterate(&blk); |
duke@435 | 352 | } |
duke@435 | 353 | |
duke@435 | 354 | |
duke@435 | 355 | void ConstantPoolCacheEntry::oop_iterate(OopClosure* blk) { |
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 | blk->do_oop((oop*)&_f1); |
duke@435 | 359 | if (is_vfinal()) { |
duke@435 | 360 | blk->do_oop((oop*)&_f2); |
duke@435 | 361 | } |
duke@435 | 362 | } |
duke@435 | 363 | |
duke@435 | 364 | |
duke@435 | 365 | void ConstantPoolCacheEntry::oop_iterate_m(OopClosure* blk, MemRegion mr) { |
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 | if (mr.contains((oop *)&_f1)) blk->do_oop((oop*)&_f1); |
duke@435 | 369 | if (is_vfinal()) { |
duke@435 | 370 | if (mr.contains((oop *)&_f2)) blk->do_oop((oop*)&_f2); |
duke@435 | 371 | } |
duke@435 | 372 | } |
duke@435 | 373 | |
duke@435 | 374 | |
duke@435 | 375 | void ConstantPoolCacheEntry::follow_contents() { |
duke@435 | 376 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 377 | // field[1] is always oop or NULL |
duke@435 | 378 | MarkSweep::mark_and_push((oop*)&_f1); |
duke@435 | 379 | if (is_vfinal()) { |
duke@435 | 380 | MarkSweep::mark_and_push((oop*)&_f2); |
duke@435 | 381 | } |
duke@435 | 382 | } |
duke@435 | 383 | |
duke@435 | 384 | #ifndef SERIALGC |
duke@435 | 385 | void ConstantPoolCacheEntry::follow_contents(ParCompactionManager* cm) { |
duke@435 | 386 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 387 | // field[1] is always oop or NULL |
duke@435 | 388 | PSParallelCompact::mark_and_push(cm, (oop*)&_f1); |
duke@435 | 389 | if (is_vfinal()) { |
duke@435 | 390 | PSParallelCompact::mark_and_push(cm, (oop*)&_f2); |
duke@435 | 391 | } |
duke@435 | 392 | } |
duke@435 | 393 | #endif // SERIALGC |
duke@435 | 394 | |
duke@435 | 395 | void ConstantPoolCacheEntry::adjust_pointers() { |
duke@435 | 396 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 397 | // field[1] is always oop or NULL |
duke@435 | 398 | MarkSweep::adjust_pointer((oop*)&_f1); |
duke@435 | 399 | if (is_vfinal()) { |
duke@435 | 400 | MarkSweep::adjust_pointer((oop*)&_f2); |
duke@435 | 401 | } |
duke@435 | 402 | } |
duke@435 | 403 | |
duke@435 | 404 | #ifndef SERIALGC |
duke@435 | 405 | void ConstantPoolCacheEntry::update_pointers() { |
duke@435 | 406 | assert(in_words(size()) == 4, "check code below - may need adjustment"); |
duke@435 | 407 | // field[1] is always oop or NULL |
duke@435 | 408 | PSParallelCompact::adjust_pointer((oop*)&_f1); |
duke@435 | 409 | if (is_vfinal()) { |
duke@435 | 410 | PSParallelCompact::adjust_pointer((oop*)&_f2); |
duke@435 | 411 | } |
duke@435 | 412 | } |
duke@435 | 413 | #endif // SERIALGC |
duke@435 | 414 | |
duke@435 | 415 | // RedefineClasses() API support: |
duke@435 | 416 | // If this constantPoolCacheEntry refers to old_method then update it |
duke@435 | 417 | // to refer to new_method. |
duke@435 | 418 | bool ConstantPoolCacheEntry::adjust_method_entry(methodOop old_method, |
duke@435 | 419 | methodOop new_method, bool * trace_name_printed) { |
duke@435 | 420 | |
duke@435 | 421 | if (is_vfinal()) { |
duke@435 | 422 | // virtual and final so f2() contains method ptr instead of vtable index |
duke@435 | 423 | if (f2() == (intptr_t)old_method) { |
duke@435 | 424 | // match old_method so need an update |
duke@435 | 425 | _f2 = (intptr_t)new_method; |
duke@435 | 426 | if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
duke@435 | 427 | if (!(*trace_name_printed)) { |
duke@435 | 428 | // RC_TRACE_MESG macro has an embedded ResourceMark |
duke@435 | 429 | RC_TRACE_MESG(("adjust: name=%s", |
duke@435 | 430 | Klass::cast(old_method->method_holder())->external_name())); |
duke@435 | 431 | *trace_name_printed = true; |
duke@435 | 432 | } |
duke@435 | 433 | // RC_TRACE macro has an embedded ResourceMark |
duke@435 | 434 | RC_TRACE(0x00400000, ("cpc vf-entry update: %s(%s)", |
duke@435 | 435 | new_method->name()->as_C_string(), |
duke@435 | 436 | new_method->signature()->as_C_string())); |
duke@435 | 437 | } |
duke@435 | 438 | |
duke@435 | 439 | return true; |
duke@435 | 440 | } |
duke@435 | 441 | |
duke@435 | 442 | // f1() is not used with virtual entries so bail out |
duke@435 | 443 | return false; |
duke@435 | 444 | } |
duke@435 | 445 | |
duke@435 | 446 | if ((oop)_f1 == NULL) { |
duke@435 | 447 | // NULL f1() means this is a virtual entry so bail out |
duke@435 | 448 | // We are assuming that the vtable index does not need change. |
duke@435 | 449 | return false; |
duke@435 | 450 | } |
duke@435 | 451 | |
duke@435 | 452 | if ((oop)_f1 == old_method) { |
duke@435 | 453 | _f1 = new_method; |
duke@435 | 454 | if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
duke@435 | 455 | if (!(*trace_name_printed)) { |
duke@435 | 456 | // RC_TRACE_MESG macro has an embedded ResourceMark |
duke@435 | 457 | RC_TRACE_MESG(("adjust: name=%s", |
duke@435 | 458 | Klass::cast(old_method->method_holder())->external_name())); |
duke@435 | 459 | *trace_name_printed = true; |
duke@435 | 460 | } |
duke@435 | 461 | // RC_TRACE macro has an embedded ResourceMark |
duke@435 | 462 | RC_TRACE(0x00400000, ("cpc entry update: %s(%s)", |
duke@435 | 463 | new_method->name()->as_C_string(), |
duke@435 | 464 | new_method->signature()->as_C_string())); |
duke@435 | 465 | } |
duke@435 | 466 | |
duke@435 | 467 | return true; |
duke@435 | 468 | } |
duke@435 | 469 | |
duke@435 | 470 | return false; |
duke@435 | 471 | } |
duke@435 | 472 | |
duke@435 | 473 | bool ConstantPoolCacheEntry::is_interesting_method_entry(klassOop k) { |
duke@435 | 474 | if (!is_method_entry()) { |
duke@435 | 475 | // not a method entry so not interesting by default |
duke@435 | 476 | return false; |
duke@435 | 477 | } |
duke@435 | 478 | |
duke@435 | 479 | methodOop m = NULL; |
duke@435 | 480 | if (is_vfinal()) { |
duke@435 | 481 | // virtual and final so _f2 contains method ptr instead of vtable index |
duke@435 | 482 | m = (methodOop)_f2; |
duke@435 | 483 | } else if ((oop)_f1 == NULL) { |
duke@435 | 484 | // NULL _f1 means this is a virtual entry so also not interesting |
duke@435 | 485 | return false; |
duke@435 | 486 | } else { |
duke@435 | 487 | if (!((oop)_f1)->is_method()) { |
duke@435 | 488 | // _f1 can also contain a klassOop for an interface |
duke@435 | 489 | return false; |
duke@435 | 490 | } |
duke@435 | 491 | m = (methodOop)_f1; |
duke@435 | 492 | } |
duke@435 | 493 | |
duke@435 | 494 | assert(m != NULL && m->is_method(), "sanity check"); |
duke@435 | 495 | if (m == NULL || !m->is_method() || m->method_holder() != k) { |
duke@435 | 496 | // robustness for above sanity checks or method is not in |
duke@435 | 497 | // the interesting class |
duke@435 | 498 | return false; |
duke@435 | 499 | } |
duke@435 | 500 | |
duke@435 | 501 | // the method is in the interesting class so the entry is interesting |
duke@435 | 502 | return true; |
duke@435 | 503 | } |
duke@435 | 504 | |
duke@435 | 505 | void ConstantPoolCacheEntry::print(outputStream* st, int index) const { |
duke@435 | 506 | // print separator |
duke@435 | 507 | if (index == 0) tty->print_cr(" -------------"); |
duke@435 | 508 | // print entry |
jrose@2015 | 509 | tty->print("%3d ("PTR_FORMAT") ", index, (intptr_t)this); |
jrose@1161 | 510 | if (is_secondary_entry()) |
jrose@1161 | 511 | tty->print_cr("[%5d|secondary]", main_entry_index()); |
jrose@1161 | 512 | else |
jrose@1161 | 513 | tty->print_cr("[%02x|%02x|%5d]", bytecode_2(), bytecode_1(), constant_pool_index()); |
jrose@2015 | 514 | tty->print_cr(" [ "PTR_FORMAT"]", (intptr_t)(oop)_f1); |
jrose@2015 | 515 | tty->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_f2); |
jrose@2015 | 516 | tty->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_flags); |
duke@435 | 517 | tty->print_cr(" -------------"); |
duke@435 | 518 | } |
duke@435 | 519 | |
duke@435 | 520 | void ConstantPoolCacheEntry::verify(outputStream* st) const { |
duke@435 | 521 | // not implemented yet |
duke@435 | 522 | } |
duke@435 | 523 | |
duke@435 | 524 | // Implementation of ConstantPoolCache |
duke@435 | 525 | |
duke@435 | 526 | void constantPoolCacheOopDesc::initialize(intArray& inverse_index_map) { |
duke@435 | 527 | assert(inverse_index_map.length() == length(), "inverse index map must have same length as cache"); |
jrose@1494 | 528 | for (int i = 0; i < length(); i++) { |
jrose@1494 | 529 | ConstantPoolCacheEntry* e = entry_at(i); |
jrose@1494 | 530 | int original_index = inverse_index_map[i]; |
jrose@1494 | 531 | if ((original_index & Rewriter::_secondary_entry_tag) != 0) { |
jrose@1494 | 532 | int main_index = (original_index - Rewriter::_secondary_entry_tag); |
jrose@1494 | 533 | assert(!entry_at(main_index)->is_secondary_entry(), "valid main index"); |
jrose@1494 | 534 | e->initialize_secondary_entry(main_index); |
jrose@1494 | 535 | } else { |
jrose@1494 | 536 | e->initialize_entry(original_index); |
jrose@1494 | 537 | } |
jrose@1494 | 538 | assert(entry_at(i) == e, "sanity"); |
jrose@1494 | 539 | } |
duke@435 | 540 | } |
duke@435 | 541 | |
duke@435 | 542 | // RedefineClasses() API support: |
duke@435 | 543 | // If any entry of this constantPoolCache points to any of |
duke@435 | 544 | // old_methods, replace it with the corresponding new_method. |
duke@435 | 545 | void constantPoolCacheOopDesc::adjust_method_entries(methodOop* old_methods, methodOop* new_methods, |
duke@435 | 546 | int methods_length, bool * trace_name_printed) { |
duke@435 | 547 | |
duke@435 | 548 | if (methods_length == 0) { |
duke@435 | 549 | // nothing to do if there are no methods |
duke@435 | 550 | return; |
duke@435 | 551 | } |
duke@435 | 552 | |
duke@435 | 553 | // get shorthand for the interesting class |
duke@435 | 554 | klassOop old_holder = old_methods[0]->method_holder(); |
duke@435 | 555 | |
duke@435 | 556 | for (int i = 0; i < length(); i++) { |
duke@435 | 557 | if (!entry_at(i)->is_interesting_method_entry(old_holder)) { |
duke@435 | 558 | // skip uninteresting methods |
duke@435 | 559 | continue; |
duke@435 | 560 | } |
duke@435 | 561 | |
duke@435 | 562 | // The constantPoolCache contains entries for several different |
duke@435 | 563 | // things, but we only care about methods. In fact, we only care |
duke@435 | 564 | // about methods in the same class as the one that contains the |
duke@435 | 565 | // old_methods. At this point, we have an interesting entry. |
duke@435 | 566 | |
duke@435 | 567 | for (int j = 0; j < methods_length; j++) { |
duke@435 | 568 | methodOop old_method = old_methods[j]; |
duke@435 | 569 | methodOop new_method = new_methods[j]; |
duke@435 | 570 | |
duke@435 | 571 | if (entry_at(i)->adjust_method_entry(old_method, new_method, |
duke@435 | 572 | trace_name_printed)) { |
duke@435 | 573 | // current old_method matched this entry and we updated it so |
duke@435 | 574 | // break out and get to the next interesting entry if there one |
duke@435 | 575 | break; |
duke@435 | 576 | } |
duke@435 | 577 | } |
duke@435 | 578 | } |
duke@435 | 579 | } |