Sat, 30 Oct 2010 11:45:35 -0700
6981788: GC map generator sometimes picks up the wrong kind of instruction operand
Summary: Distinguish pool indexes from cache indexes in recently changed code.
Reviewed-by: never
duke@435 | 1 | /* |
iveresov@2138 | 2 | * Copyright (c) 2000, 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/_methodDataOop.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | // ================================================================== |
duke@435 | 29 | // DataLayout |
duke@435 | 30 | // |
duke@435 | 31 | // Overlay for generic profiling data. |
duke@435 | 32 | |
duke@435 | 33 | // Some types of data layouts need a length field. |
duke@435 | 34 | bool DataLayout::needs_array_len(u1 tag) { |
kvn@480 | 35 | return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag); |
duke@435 | 36 | } |
duke@435 | 37 | |
duke@435 | 38 | // Perform generic initialization of the data. More specific |
duke@435 | 39 | // initialization occurs in overrides of ProfileData::post_initialize. |
duke@435 | 40 | void DataLayout::initialize(u1 tag, u2 bci, int cell_count) { |
duke@435 | 41 | _header._bits = (intptr_t)0; |
duke@435 | 42 | _header._struct._tag = tag; |
duke@435 | 43 | _header._struct._bci = bci; |
duke@435 | 44 | for (int i = 0; i < cell_count; i++) { |
duke@435 | 45 | set_cell_at(i, (intptr_t)0); |
duke@435 | 46 | } |
duke@435 | 47 | if (needs_array_len(tag)) { |
duke@435 | 48 | set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header. |
duke@435 | 49 | } |
duke@435 | 50 | } |
duke@435 | 51 | |
ysr@1376 | 52 | void DataLayout::follow_weak_refs(BoolObjectClosure* cl) { |
ysr@1376 | 53 | ResourceMark m; |
ysr@1376 | 54 | data_in()->follow_weak_refs(cl); |
ysr@1376 | 55 | } |
ysr@1376 | 56 | |
ysr@1376 | 57 | |
duke@435 | 58 | // ================================================================== |
duke@435 | 59 | // ProfileData |
duke@435 | 60 | // |
duke@435 | 61 | // A ProfileData object is created to refer to a section of profiling |
duke@435 | 62 | // data in a structured way. |
duke@435 | 63 | |
duke@435 | 64 | // Constructor for invalid ProfileData. |
duke@435 | 65 | ProfileData::ProfileData() { |
duke@435 | 66 | _data = NULL; |
duke@435 | 67 | } |
duke@435 | 68 | |
duke@435 | 69 | #ifndef PRODUCT |
duke@435 | 70 | void ProfileData::print_shared(outputStream* st, const char* name) { |
duke@435 | 71 | st->print("bci: %d", bci()); |
duke@435 | 72 | st->fill_to(tab_width_one); |
duke@435 | 73 | st->print("%s", name); |
duke@435 | 74 | tab(st); |
duke@435 | 75 | int trap = trap_state(); |
duke@435 | 76 | if (trap != 0) { |
duke@435 | 77 | char buf[100]; |
duke@435 | 78 | st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); |
duke@435 | 79 | } |
duke@435 | 80 | int flags = data()->flags(); |
duke@435 | 81 | if (flags != 0) |
duke@435 | 82 | st->print("flags(%d) ", flags); |
duke@435 | 83 | } |
duke@435 | 84 | |
duke@435 | 85 | void ProfileData::tab(outputStream* st) { |
duke@435 | 86 | st->fill_to(tab_width_two); |
duke@435 | 87 | } |
duke@435 | 88 | #endif // !PRODUCT |
duke@435 | 89 | |
duke@435 | 90 | // ================================================================== |
duke@435 | 91 | // BitData |
duke@435 | 92 | // |
duke@435 | 93 | // A BitData corresponds to a one-bit flag. This is used to indicate |
duke@435 | 94 | // whether a checkcast bytecode has seen a null value. |
duke@435 | 95 | |
duke@435 | 96 | |
duke@435 | 97 | #ifndef PRODUCT |
duke@435 | 98 | void BitData::print_data_on(outputStream* st) { |
duke@435 | 99 | print_shared(st, "BitData"); |
duke@435 | 100 | } |
duke@435 | 101 | #endif // !PRODUCT |
duke@435 | 102 | |
duke@435 | 103 | // ================================================================== |
duke@435 | 104 | // CounterData |
duke@435 | 105 | // |
duke@435 | 106 | // A CounterData corresponds to a simple counter. |
duke@435 | 107 | |
duke@435 | 108 | #ifndef PRODUCT |
duke@435 | 109 | void CounterData::print_data_on(outputStream* st) { |
duke@435 | 110 | print_shared(st, "CounterData"); |
duke@435 | 111 | st->print_cr("count(%u)", count()); |
duke@435 | 112 | } |
duke@435 | 113 | #endif // !PRODUCT |
duke@435 | 114 | |
duke@435 | 115 | // ================================================================== |
duke@435 | 116 | // JumpData |
duke@435 | 117 | // |
duke@435 | 118 | // A JumpData is used to access profiling information for a direct |
duke@435 | 119 | // branch. It is a counter, used for counting the number of branches, |
duke@435 | 120 | // plus a data displacement, used for realigning the data pointer to |
duke@435 | 121 | // the corresponding target bci. |
duke@435 | 122 | |
duke@435 | 123 | void JumpData::post_initialize(BytecodeStream* stream, methodDataOop mdo) { |
duke@435 | 124 | assert(stream->bci() == bci(), "wrong pos"); |
duke@435 | 125 | int target; |
duke@435 | 126 | Bytecodes::Code c = stream->code(); |
duke@435 | 127 | if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) { |
duke@435 | 128 | target = stream->dest_w(); |
duke@435 | 129 | } else { |
duke@435 | 130 | target = stream->dest(); |
duke@435 | 131 | } |
duke@435 | 132 | int my_di = mdo->dp_to_di(dp()); |
duke@435 | 133 | int target_di = mdo->bci_to_di(target); |
duke@435 | 134 | int offset = target_di - my_di; |
duke@435 | 135 | set_displacement(offset); |
duke@435 | 136 | } |
duke@435 | 137 | |
duke@435 | 138 | #ifndef PRODUCT |
duke@435 | 139 | void JumpData::print_data_on(outputStream* st) { |
duke@435 | 140 | print_shared(st, "JumpData"); |
duke@435 | 141 | st->print_cr("taken(%u) displacement(%d)", taken(), displacement()); |
duke@435 | 142 | } |
duke@435 | 143 | #endif // !PRODUCT |
duke@435 | 144 | |
duke@435 | 145 | // ================================================================== |
duke@435 | 146 | // ReceiverTypeData |
duke@435 | 147 | // |
duke@435 | 148 | // A ReceiverTypeData is used to access profiling information about a |
duke@435 | 149 | // dynamic type check. It consists of a counter which counts the total times |
duke@435 | 150 | // that the check is reached, and a series of (klassOop, count) pairs |
duke@435 | 151 | // which are used to store a type profile for the receiver of the check. |
duke@435 | 152 | |
duke@435 | 153 | void ReceiverTypeData::follow_contents() { |
ysr@1376 | 154 | // This is a set of weak references that need |
ysr@1376 | 155 | // to be followed at the end of the strong marking |
ysr@1376 | 156 | // phase. Memoize this object so it can be visited |
ysr@1376 | 157 | // in the weak roots processing phase. |
ysr@1376 | 158 | MarkSweep::revisit_mdo(data()); |
duke@435 | 159 | } |
duke@435 | 160 | |
duke@435 | 161 | #ifndef SERIALGC |
duke@435 | 162 | void ReceiverTypeData::follow_contents(ParCompactionManager* cm) { |
ysr@1376 | 163 | // This is a set of weak references that need |
ysr@1376 | 164 | // to be followed at the end of the strong marking |
ysr@1376 | 165 | // phase. Memoize this object so it can be visited |
ysr@1376 | 166 | // in the weak roots processing phase. |
ysr@1376 | 167 | PSParallelCompact::revisit_mdo(cm, data()); |
duke@435 | 168 | } |
duke@435 | 169 | #endif // SERIALGC |
duke@435 | 170 | |
duke@435 | 171 | void ReceiverTypeData::oop_iterate(OopClosure* blk) { |
ysr@1376 | 172 | if (blk->should_remember_mdo()) { |
ysr@1376 | 173 | // This is a set of weak references that need |
ysr@1376 | 174 | // to be followed at the end of the strong marking |
ysr@1376 | 175 | // phase. Memoize this object so it can be visited |
ysr@1376 | 176 | // in the weak roots processing phase. |
ysr@1376 | 177 | blk->remember_mdo(data()); |
ysr@1376 | 178 | } else { // normal scan |
ysr@1376 | 179 | for (uint row = 0; row < row_limit(); row++) { |
ysr@1376 | 180 | if (receiver(row) != NULL) { |
ysr@1376 | 181 | oop* adr = adr_receiver(row); |
duke@435 | 182 | blk->do_oop(adr); |
duke@435 | 183 | } |
duke@435 | 184 | } |
duke@435 | 185 | } |
duke@435 | 186 | } |
duke@435 | 187 | |
ysr@1376 | 188 | void ReceiverTypeData::oop_iterate_m(OopClosure* blk, MemRegion mr) { |
ysr@1376 | 189 | // Currently, this interface is called only during card-scanning for |
ysr@1376 | 190 | // a young gen gc, in which case this object cannot contribute anything, |
ysr@1376 | 191 | // since it does not contain any references that cross out of |
ysr@1376 | 192 | // the perm gen. However, for future more general use we allow |
ysr@1376 | 193 | // the possibility of calling for instance from more general |
ysr@1376 | 194 | // iterators (for example, a future regionalized perm gen for G1, |
ysr@1376 | 195 | // or the possibility of moving some references out of perm in |
ysr@1376 | 196 | // the case of other collectors). In that case, you will need |
ysr@1376 | 197 | // to relax or remove some of the assertions below. |
ysr@1376 | 198 | #ifdef ASSERT |
ysr@1376 | 199 | // Verify that none of the embedded oop references cross out of |
ysr@1376 | 200 | // this generation. |
ysr@1376 | 201 | for (uint row = 0; row < row_limit(); row++) { |
ysr@1376 | 202 | if (receiver(row) != NULL) { |
ysr@1376 | 203 | oop* adr = adr_receiver(row); |
ysr@1376 | 204 | CollectedHeap* h = Universe::heap(); |
ysr@1376 | 205 | assert(h->is_permanent(adr) && h->is_permanent_or_null(*adr), "Not intra-perm"); |
ysr@1376 | 206 | } |
ysr@1376 | 207 | } |
ysr@1376 | 208 | #endif // ASSERT |
ysr@1376 | 209 | assert(!blk->should_remember_mdo(), "Not expected to remember MDO"); |
ysr@1376 | 210 | return; // Nothing to do, see comment above |
ysr@1376 | 211 | #if 0 |
ysr@1376 | 212 | if (blk->should_remember_mdo()) { |
ysr@1376 | 213 | // This is a set of weak references that need |
ysr@1376 | 214 | // to be followed at the end of the strong marking |
ysr@1376 | 215 | // phase. Memoize this object so it can be visited |
ysr@1376 | 216 | // in the weak roots processing phase. |
ysr@1376 | 217 | blk->remember_mdo(data()); |
ysr@1376 | 218 | } else { // normal scan |
ysr@1376 | 219 | for (uint row = 0; row < row_limit(); row++) { |
ysr@1376 | 220 | if (receiver(row) != NULL) { |
ysr@1376 | 221 | oop* adr = adr_receiver(row); |
ysr@1376 | 222 | if (mr.contains(adr)) { |
ysr@1376 | 223 | blk->do_oop(adr); |
ysr@1376 | 224 | } else if ((HeapWord*)adr >= mr.end()) { |
ysr@1376 | 225 | // Test that the current cursor and the two ends of the range |
ysr@1376 | 226 | // that we may have skipped iterating over are monotonically ordered; |
ysr@1376 | 227 | // this is just a paranoid assertion, just in case represetations |
ysr@1376 | 228 | // should change in the future rendering the short-circuit return |
ysr@1376 | 229 | // here invalid. |
ysr@1376 | 230 | assert((row+1 >= row_limit() || adr_receiver(row+1) > adr) && |
ysr@1376 | 231 | (row+2 >= row_limit() || adr_receiver(row_limit()-1) > adr_receiver(row+1)), "Reducing?"); |
ysr@1376 | 232 | break; // remaining should be outside this mr too |
ysr@1376 | 233 | } |
ysr@1376 | 234 | } |
ysr@1376 | 235 | } |
ysr@1376 | 236 | } |
ysr@1376 | 237 | #endif |
ysr@1376 | 238 | } |
ysr@1376 | 239 | |
duke@435 | 240 | void ReceiverTypeData::adjust_pointers() { |
duke@435 | 241 | for (uint row = 0; row < row_limit(); row++) { |
duke@435 | 242 | if (receiver(row) != NULL) { |
duke@435 | 243 | MarkSweep::adjust_pointer(adr_receiver(row)); |
duke@435 | 244 | } |
duke@435 | 245 | } |
duke@435 | 246 | } |
duke@435 | 247 | |
ysr@1376 | 248 | void ReceiverTypeData::follow_weak_refs(BoolObjectClosure* is_alive_cl) { |
ysr@1376 | 249 | for (uint row = 0; row < row_limit(); row++) { |
ysr@1376 | 250 | klassOop p = receiver(row); |
ysr@1376 | 251 | if (p != NULL && !is_alive_cl->do_object_b(p)) { |
ysr@1376 | 252 | clear_row(row); |
ysr@1376 | 253 | } |
ysr@1376 | 254 | } |
ysr@1376 | 255 | } |
ysr@1376 | 256 | |
duke@435 | 257 | #ifndef SERIALGC |
duke@435 | 258 | void ReceiverTypeData::update_pointers() { |
duke@435 | 259 | for (uint row = 0; row < row_limit(); row++) { |
duke@435 | 260 | if (receiver_unchecked(row) != NULL) { |
duke@435 | 261 | PSParallelCompact::adjust_pointer(adr_receiver(row)); |
duke@435 | 262 | } |
duke@435 | 263 | } |
duke@435 | 264 | } |
duke@435 | 265 | |
duke@435 | 266 | void ReceiverTypeData::update_pointers(HeapWord* beg_addr, HeapWord* end_addr) { |
duke@435 | 267 | // The loop bounds could be computed based on beg_addr/end_addr and the |
duke@435 | 268 | // boundary test hoisted outside the loop (see klassVTable for an example); |
duke@435 | 269 | // however, row_limit() is small enough (2) to make that less efficient. |
duke@435 | 270 | for (uint row = 0; row < row_limit(); row++) { |
duke@435 | 271 | if (receiver_unchecked(row) != NULL) { |
duke@435 | 272 | PSParallelCompact::adjust_pointer(adr_receiver(row), beg_addr, end_addr); |
duke@435 | 273 | } |
duke@435 | 274 | } |
duke@435 | 275 | } |
duke@435 | 276 | #endif // SERIALGC |
duke@435 | 277 | |
duke@435 | 278 | #ifndef PRODUCT |
duke@435 | 279 | void ReceiverTypeData::print_receiver_data_on(outputStream* st) { |
duke@435 | 280 | uint row; |
duke@435 | 281 | int entries = 0; |
duke@435 | 282 | for (row = 0; row < row_limit(); row++) { |
duke@435 | 283 | if (receiver(row) != NULL) entries++; |
duke@435 | 284 | } |
duke@435 | 285 | st->print_cr("count(%u) entries(%u)", count(), entries); |
iveresov@2138 | 286 | int total = count(); |
iveresov@2138 | 287 | for (row = 0; row < row_limit(); row++) { |
iveresov@2138 | 288 | if (receiver(row) != NULL) { |
iveresov@2138 | 289 | total += receiver_count(row); |
iveresov@2138 | 290 | } |
iveresov@2138 | 291 | } |
duke@435 | 292 | for (row = 0; row < row_limit(); row++) { |
duke@435 | 293 | if (receiver(row) != NULL) { |
duke@435 | 294 | tab(st); |
duke@435 | 295 | receiver(row)->print_value_on(st); |
iveresov@2138 | 296 | st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
duke@435 | 297 | } |
duke@435 | 298 | } |
duke@435 | 299 | } |
duke@435 | 300 | void ReceiverTypeData::print_data_on(outputStream* st) { |
duke@435 | 301 | print_shared(st, "ReceiverTypeData"); |
duke@435 | 302 | print_receiver_data_on(st); |
duke@435 | 303 | } |
duke@435 | 304 | void VirtualCallData::print_data_on(outputStream* st) { |
duke@435 | 305 | print_shared(st, "VirtualCallData"); |
duke@435 | 306 | print_receiver_data_on(st); |
duke@435 | 307 | } |
duke@435 | 308 | #endif // !PRODUCT |
duke@435 | 309 | |
duke@435 | 310 | // ================================================================== |
duke@435 | 311 | // RetData |
duke@435 | 312 | // |
duke@435 | 313 | // A RetData is used to access profiling information for a ret bytecode. |
duke@435 | 314 | // It is composed of a count of the number of times that the ret has |
duke@435 | 315 | // been executed, followed by a series of triples of the form |
duke@435 | 316 | // (bci, count, di) which count the number of times that some bci was the |
duke@435 | 317 | // target of the ret and cache a corresponding displacement. |
duke@435 | 318 | |
duke@435 | 319 | void RetData::post_initialize(BytecodeStream* stream, methodDataOop mdo) { |
duke@435 | 320 | for (uint row = 0; row < row_limit(); row++) { |
duke@435 | 321 | set_bci_displacement(row, -1); |
duke@435 | 322 | set_bci(row, no_bci); |
duke@435 | 323 | } |
duke@435 | 324 | // release so other threads see a consistent state. bci is used as |
duke@435 | 325 | // a valid flag for bci_displacement. |
duke@435 | 326 | OrderAccess::release(); |
duke@435 | 327 | } |
duke@435 | 328 | |
duke@435 | 329 | // This routine needs to atomically update the RetData structure, so the |
duke@435 | 330 | // caller needs to hold the RetData_lock before it gets here. Since taking |
duke@435 | 331 | // the lock can block (and allow GC) and since RetData is a ProfileData is a |
duke@435 | 332 | // wrapper around a derived oop, taking the lock in _this_ method will |
duke@435 | 333 | // basically cause the 'this' pointer's _data field to contain junk after the |
duke@435 | 334 | // lock. We require the caller to take the lock before making the ProfileData |
duke@435 | 335 | // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret |
duke@435 | 336 | address RetData::fixup_ret(int return_bci, methodDataHandle h_mdo) { |
duke@435 | 337 | // First find the mdp which corresponds to the return bci. |
duke@435 | 338 | address mdp = h_mdo->bci_to_dp(return_bci); |
duke@435 | 339 | |
duke@435 | 340 | // Now check to see if any of the cache slots are open. |
duke@435 | 341 | for (uint row = 0; row < row_limit(); row++) { |
duke@435 | 342 | if (bci(row) == no_bci) { |
duke@435 | 343 | set_bci_displacement(row, mdp - dp()); |
duke@435 | 344 | set_bci_count(row, DataLayout::counter_increment); |
duke@435 | 345 | // Barrier to ensure displacement is written before the bci; allows |
duke@435 | 346 | // the interpreter to read displacement without fear of race condition. |
duke@435 | 347 | release_set_bci(row, return_bci); |
duke@435 | 348 | break; |
duke@435 | 349 | } |
duke@435 | 350 | } |
duke@435 | 351 | return mdp; |
duke@435 | 352 | } |
duke@435 | 353 | |
duke@435 | 354 | |
duke@435 | 355 | #ifndef PRODUCT |
duke@435 | 356 | void RetData::print_data_on(outputStream* st) { |
duke@435 | 357 | print_shared(st, "RetData"); |
duke@435 | 358 | uint row; |
duke@435 | 359 | int entries = 0; |
duke@435 | 360 | for (row = 0; row < row_limit(); row++) { |
duke@435 | 361 | if (bci(row) != no_bci) entries++; |
duke@435 | 362 | } |
duke@435 | 363 | st->print_cr("count(%u) entries(%u)", count(), entries); |
duke@435 | 364 | for (row = 0; row < row_limit(); row++) { |
duke@435 | 365 | if (bci(row) != no_bci) { |
duke@435 | 366 | tab(st); |
duke@435 | 367 | st->print_cr("bci(%d: count(%u) displacement(%d))", |
duke@435 | 368 | bci(row), bci_count(row), bci_displacement(row)); |
duke@435 | 369 | } |
duke@435 | 370 | } |
duke@435 | 371 | } |
duke@435 | 372 | #endif // !PRODUCT |
duke@435 | 373 | |
duke@435 | 374 | // ================================================================== |
duke@435 | 375 | // BranchData |
duke@435 | 376 | // |
duke@435 | 377 | // A BranchData is used to access profiling data for a two-way branch. |
duke@435 | 378 | // It consists of taken and not_taken counts as well as a data displacement |
duke@435 | 379 | // for the taken case. |
duke@435 | 380 | |
duke@435 | 381 | void BranchData::post_initialize(BytecodeStream* stream, methodDataOop mdo) { |
duke@435 | 382 | assert(stream->bci() == bci(), "wrong pos"); |
duke@435 | 383 | int target = stream->dest(); |
duke@435 | 384 | int my_di = mdo->dp_to_di(dp()); |
duke@435 | 385 | int target_di = mdo->bci_to_di(target); |
duke@435 | 386 | int offset = target_di - my_di; |
duke@435 | 387 | set_displacement(offset); |
duke@435 | 388 | } |
duke@435 | 389 | |
duke@435 | 390 | #ifndef PRODUCT |
duke@435 | 391 | void BranchData::print_data_on(outputStream* st) { |
duke@435 | 392 | print_shared(st, "BranchData"); |
duke@435 | 393 | st->print_cr("taken(%u) displacement(%d)", |
duke@435 | 394 | taken(), displacement()); |
duke@435 | 395 | tab(st); |
duke@435 | 396 | st->print_cr("not taken(%u)", not_taken()); |
duke@435 | 397 | } |
duke@435 | 398 | #endif |
duke@435 | 399 | |
duke@435 | 400 | // ================================================================== |
duke@435 | 401 | // MultiBranchData |
duke@435 | 402 | // |
duke@435 | 403 | // A MultiBranchData is used to access profiling information for |
duke@435 | 404 | // a multi-way branch (*switch bytecodes). It consists of a series |
duke@435 | 405 | // of (count, displacement) pairs, which count the number of times each |
duke@435 | 406 | // case was taken and specify the data displacment for each branch target. |
duke@435 | 407 | |
duke@435 | 408 | int MultiBranchData::compute_cell_count(BytecodeStream* stream) { |
duke@435 | 409 | int cell_count = 0; |
duke@435 | 410 | if (stream->code() == Bytecodes::_tableswitch) { |
duke@435 | 411 | Bytecode_tableswitch* sw = Bytecode_tableswitch_at(stream->bcp()); |
duke@435 | 412 | cell_count = 1 + per_case_cell_count * (1 + sw->length()); // 1 for default |
duke@435 | 413 | } else { |
duke@435 | 414 | Bytecode_lookupswitch* sw = Bytecode_lookupswitch_at(stream->bcp()); |
duke@435 | 415 | cell_count = 1 + per_case_cell_count * (sw->number_of_pairs() + 1); // 1 for default |
duke@435 | 416 | } |
duke@435 | 417 | return cell_count; |
duke@435 | 418 | } |
duke@435 | 419 | |
duke@435 | 420 | void MultiBranchData::post_initialize(BytecodeStream* stream, |
duke@435 | 421 | methodDataOop mdo) { |
duke@435 | 422 | assert(stream->bci() == bci(), "wrong pos"); |
duke@435 | 423 | int target; |
duke@435 | 424 | int my_di; |
duke@435 | 425 | int target_di; |
duke@435 | 426 | int offset; |
duke@435 | 427 | if (stream->code() == Bytecodes::_tableswitch) { |
duke@435 | 428 | Bytecode_tableswitch* sw = Bytecode_tableswitch_at(stream->bcp()); |
duke@435 | 429 | int len = sw->length(); |
duke@435 | 430 | assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
duke@435 | 431 | for (int count = 0; count < len; count++) { |
duke@435 | 432 | target = sw->dest_offset_at(count) + bci(); |
duke@435 | 433 | my_di = mdo->dp_to_di(dp()); |
duke@435 | 434 | target_di = mdo->bci_to_di(target); |
duke@435 | 435 | offset = target_di - my_di; |
duke@435 | 436 | set_displacement_at(count, offset); |
duke@435 | 437 | } |
duke@435 | 438 | target = sw->default_offset() + bci(); |
duke@435 | 439 | my_di = mdo->dp_to_di(dp()); |
duke@435 | 440 | target_di = mdo->bci_to_di(target); |
duke@435 | 441 | offset = target_di - my_di; |
duke@435 | 442 | set_default_displacement(offset); |
duke@435 | 443 | |
duke@435 | 444 | } else { |
duke@435 | 445 | Bytecode_lookupswitch* sw = Bytecode_lookupswitch_at(stream->bcp()); |
duke@435 | 446 | int npairs = sw->number_of_pairs(); |
duke@435 | 447 | assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
duke@435 | 448 | for (int count = 0; count < npairs; count++) { |
duke@435 | 449 | LookupswitchPair *pair = sw->pair_at(count); |
duke@435 | 450 | target = pair->offset() + bci(); |
duke@435 | 451 | my_di = mdo->dp_to_di(dp()); |
duke@435 | 452 | target_di = mdo->bci_to_di(target); |
duke@435 | 453 | offset = target_di - my_di; |
duke@435 | 454 | set_displacement_at(count, offset); |
duke@435 | 455 | } |
duke@435 | 456 | target = sw->default_offset() + bci(); |
duke@435 | 457 | my_di = mdo->dp_to_di(dp()); |
duke@435 | 458 | target_di = mdo->bci_to_di(target); |
duke@435 | 459 | offset = target_di - my_di; |
duke@435 | 460 | set_default_displacement(offset); |
duke@435 | 461 | } |
duke@435 | 462 | } |
duke@435 | 463 | |
duke@435 | 464 | #ifndef PRODUCT |
duke@435 | 465 | void MultiBranchData::print_data_on(outputStream* st) { |
duke@435 | 466 | print_shared(st, "MultiBranchData"); |
duke@435 | 467 | st->print_cr("default_count(%u) displacement(%d)", |
duke@435 | 468 | default_count(), default_displacement()); |
duke@435 | 469 | int cases = number_of_cases(); |
duke@435 | 470 | for (int i = 0; i < cases; i++) { |
duke@435 | 471 | tab(st); |
duke@435 | 472 | st->print_cr("count(%u) displacement(%d)", |
duke@435 | 473 | count_at(i), displacement_at(i)); |
duke@435 | 474 | } |
duke@435 | 475 | } |
duke@435 | 476 | #endif |
duke@435 | 477 | |
kvn@480 | 478 | #ifndef PRODUCT |
kvn@480 | 479 | void ArgInfoData::print_data_on(outputStream* st) { |
kvn@480 | 480 | print_shared(st, "ArgInfoData"); |
kvn@480 | 481 | int nargs = number_of_args(); |
kvn@480 | 482 | for (int i = 0; i < nargs; i++) { |
kvn@480 | 483 | st->print(" 0x%x", arg_modified(i)); |
kvn@480 | 484 | } |
kvn@480 | 485 | st->cr(); |
kvn@480 | 486 | } |
kvn@480 | 487 | |
kvn@480 | 488 | #endif |
duke@435 | 489 | // ================================================================== |
duke@435 | 490 | // methodDataOop |
duke@435 | 491 | // |
duke@435 | 492 | // A methodDataOop holds information which has been collected about |
duke@435 | 493 | // a method. |
duke@435 | 494 | |
duke@435 | 495 | int methodDataOopDesc::bytecode_cell_count(Bytecodes::Code code) { |
duke@435 | 496 | switch (code) { |
duke@435 | 497 | case Bytecodes::_checkcast: |
duke@435 | 498 | case Bytecodes::_instanceof: |
duke@435 | 499 | case Bytecodes::_aastore: |
duke@435 | 500 | if (TypeProfileCasts) { |
duke@435 | 501 | return ReceiverTypeData::static_cell_count(); |
duke@435 | 502 | } else { |
duke@435 | 503 | return BitData::static_cell_count(); |
duke@435 | 504 | } |
duke@435 | 505 | case Bytecodes::_invokespecial: |
duke@435 | 506 | case Bytecodes::_invokestatic: |
duke@435 | 507 | return CounterData::static_cell_count(); |
duke@435 | 508 | case Bytecodes::_goto: |
duke@435 | 509 | case Bytecodes::_goto_w: |
duke@435 | 510 | case Bytecodes::_jsr: |
duke@435 | 511 | case Bytecodes::_jsr_w: |
duke@435 | 512 | return JumpData::static_cell_count(); |
duke@435 | 513 | case Bytecodes::_invokevirtual: |
duke@435 | 514 | case Bytecodes::_invokeinterface: |
duke@435 | 515 | return VirtualCallData::static_cell_count(); |
jrose@1161 | 516 | case Bytecodes::_invokedynamic: |
jrose@1161 | 517 | return CounterData::static_cell_count(); |
duke@435 | 518 | case Bytecodes::_ret: |
duke@435 | 519 | return RetData::static_cell_count(); |
duke@435 | 520 | case Bytecodes::_ifeq: |
duke@435 | 521 | case Bytecodes::_ifne: |
duke@435 | 522 | case Bytecodes::_iflt: |
duke@435 | 523 | case Bytecodes::_ifge: |
duke@435 | 524 | case Bytecodes::_ifgt: |
duke@435 | 525 | case Bytecodes::_ifle: |
duke@435 | 526 | case Bytecodes::_if_icmpeq: |
duke@435 | 527 | case Bytecodes::_if_icmpne: |
duke@435 | 528 | case Bytecodes::_if_icmplt: |
duke@435 | 529 | case Bytecodes::_if_icmpge: |
duke@435 | 530 | case Bytecodes::_if_icmpgt: |
duke@435 | 531 | case Bytecodes::_if_icmple: |
duke@435 | 532 | case Bytecodes::_if_acmpeq: |
duke@435 | 533 | case Bytecodes::_if_acmpne: |
duke@435 | 534 | case Bytecodes::_ifnull: |
duke@435 | 535 | case Bytecodes::_ifnonnull: |
duke@435 | 536 | return BranchData::static_cell_count(); |
duke@435 | 537 | case Bytecodes::_lookupswitch: |
duke@435 | 538 | case Bytecodes::_tableswitch: |
duke@435 | 539 | return variable_cell_count; |
duke@435 | 540 | } |
duke@435 | 541 | return no_profile_data; |
duke@435 | 542 | } |
duke@435 | 543 | |
duke@435 | 544 | // Compute the size of the profiling information corresponding to |
duke@435 | 545 | // the current bytecode. |
duke@435 | 546 | int methodDataOopDesc::compute_data_size(BytecodeStream* stream) { |
duke@435 | 547 | int cell_count = bytecode_cell_count(stream->code()); |
duke@435 | 548 | if (cell_count == no_profile_data) { |
duke@435 | 549 | return 0; |
duke@435 | 550 | } |
duke@435 | 551 | if (cell_count == variable_cell_count) { |
duke@435 | 552 | cell_count = MultiBranchData::compute_cell_count(stream); |
duke@435 | 553 | } |
duke@435 | 554 | // Note: cell_count might be zero, meaning that there is just |
duke@435 | 555 | // a DataLayout header, with no extra cells. |
duke@435 | 556 | assert(cell_count >= 0, "sanity"); |
duke@435 | 557 | return DataLayout::compute_size_in_bytes(cell_count); |
duke@435 | 558 | } |
duke@435 | 559 | |
duke@435 | 560 | int methodDataOopDesc::compute_extra_data_count(int data_size, int empty_bc_count) { |
duke@435 | 561 | if (ProfileTraps) { |
duke@435 | 562 | // Assume that up to 3% of BCIs with no MDP will need to allocate one. |
duke@435 | 563 | int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; |
duke@435 | 564 | // If the method is large, let the extra BCIs grow numerous (to ~1%). |
duke@435 | 565 | int one_percent_of_data |
duke@435 | 566 | = (uint)data_size / (DataLayout::header_size_in_bytes()*128); |
duke@435 | 567 | if (extra_data_count < one_percent_of_data) |
duke@435 | 568 | extra_data_count = one_percent_of_data; |
duke@435 | 569 | if (extra_data_count > empty_bc_count) |
duke@435 | 570 | extra_data_count = empty_bc_count; // no need for more |
duke@435 | 571 | return extra_data_count; |
duke@435 | 572 | } else { |
duke@435 | 573 | return 0; |
duke@435 | 574 | } |
duke@435 | 575 | } |
duke@435 | 576 | |
duke@435 | 577 | // Compute the size of the methodDataOop necessary to store |
duke@435 | 578 | // profiling information about a given method. Size is in bytes. |
duke@435 | 579 | int methodDataOopDesc::compute_allocation_size_in_bytes(methodHandle method) { |
duke@435 | 580 | int data_size = 0; |
duke@435 | 581 | BytecodeStream stream(method); |
duke@435 | 582 | Bytecodes::Code c; |
duke@435 | 583 | int empty_bc_count = 0; // number of bytecodes lacking data |
duke@435 | 584 | while ((c = stream.next()) >= 0) { |
duke@435 | 585 | int size_in_bytes = compute_data_size(&stream); |
duke@435 | 586 | data_size += size_in_bytes; |
duke@435 | 587 | if (size_in_bytes == 0) empty_bc_count += 1; |
duke@435 | 588 | } |
duke@435 | 589 | int object_size = in_bytes(data_offset()) + data_size; |
duke@435 | 590 | |
duke@435 | 591 | // Add some extra DataLayout cells (at least one) to track stray traps. |
duke@435 | 592 | int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); |
duke@435 | 593 | object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); |
duke@435 | 594 | |
kvn@480 | 595 | // Add a cell to record information about modified arguments. |
kvn@480 | 596 | int arg_size = method->size_of_parameters(); |
kvn@480 | 597 | object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
duke@435 | 598 | return object_size; |
duke@435 | 599 | } |
duke@435 | 600 | |
duke@435 | 601 | // Compute the size of the methodDataOop necessary to store |
duke@435 | 602 | // profiling information about a given method. Size is in words |
duke@435 | 603 | int methodDataOopDesc::compute_allocation_size_in_words(methodHandle method) { |
duke@435 | 604 | int byte_size = compute_allocation_size_in_bytes(method); |
duke@435 | 605 | int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; |
duke@435 | 606 | return align_object_size(word_size); |
duke@435 | 607 | } |
duke@435 | 608 | |
duke@435 | 609 | // Initialize an individual data segment. Returns the size of |
duke@435 | 610 | // the segment in bytes. |
duke@435 | 611 | int methodDataOopDesc::initialize_data(BytecodeStream* stream, |
duke@435 | 612 | int data_index) { |
duke@435 | 613 | int cell_count = -1; |
duke@435 | 614 | int tag = DataLayout::no_tag; |
duke@435 | 615 | DataLayout* data_layout = data_layout_at(data_index); |
duke@435 | 616 | Bytecodes::Code c = stream->code(); |
duke@435 | 617 | switch (c) { |
duke@435 | 618 | case Bytecodes::_checkcast: |
duke@435 | 619 | case Bytecodes::_instanceof: |
duke@435 | 620 | case Bytecodes::_aastore: |
duke@435 | 621 | if (TypeProfileCasts) { |
duke@435 | 622 | cell_count = ReceiverTypeData::static_cell_count(); |
duke@435 | 623 | tag = DataLayout::receiver_type_data_tag; |
duke@435 | 624 | } else { |
duke@435 | 625 | cell_count = BitData::static_cell_count(); |
duke@435 | 626 | tag = DataLayout::bit_data_tag; |
duke@435 | 627 | } |
duke@435 | 628 | break; |
duke@435 | 629 | case Bytecodes::_invokespecial: |
duke@435 | 630 | case Bytecodes::_invokestatic: |
duke@435 | 631 | cell_count = CounterData::static_cell_count(); |
duke@435 | 632 | tag = DataLayout::counter_data_tag; |
duke@435 | 633 | break; |
duke@435 | 634 | case Bytecodes::_goto: |
duke@435 | 635 | case Bytecodes::_goto_w: |
duke@435 | 636 | case Bytecodes::_jsr: |
duke@435 | 637 | case Bytecodes::_jsr_w: |
duke@435 | 638 | cell_count = JumpData::static_cell_count(); |
duke@435 | 639 | tag = DataLayout::jump_data_tag; |
duke@435 | 640 | break; |
duke@435 | 641 | case Bytecodes::_invokevirtual: |
duke@435 | 642 | case Bytecodes::_invokeinterface: |
duke@435 | 643 | cell_count = VirtualCallData::static_cell_count(); |
duke@435 | 644 | tag = DataLayout::virtual_call_data_tag; |
duke@435 | 645 | break; |
jrose@1161 | 646 | case Bytecodes::_invokedynamic: |
jrose@1161 | 647 | // %%% should make a type profile for any invokedynamic that takes a ref argument |
jrose@1161 | 648 | cell_count = CounterData::static_cell_count(); |
jrose@1161 | 649 | tag = DataLayout::counter_data_tag; |
jrose@1161 | 650 | break; |
duke@435 | 651 | case Bytecodes::_ret: |
duke@435 | 652 | cell_count = RetData::static_cell_count(); |
duke@435 | 653 | tag = DataLayout::ret_data_tag; |
duke@435 | 654 | break; |
duke@435 | 655 | case Bytecodes::_ifeq: |
duke@435 | 656 | case Bytecodes::_ifne: |
duke@435 | 657 | case Bytecodes::_iflt: |
duke@435 | 658 | case Bytecodes::_ifge: |
duke@435 | 659 | case Bytecodes::_ifgt: |
duke@435 | 660 | case Bytecodes::_ifle: |
duke@435 | 661 | case Bytecodes::_if_icmpeq: |
duke@435 | 662 | case Bytecodes::_if_icmpne: |
duke@435 | 663 | case Bytecodes::_if_icmplt: |
duke@435 | 664 | case Bytecodes::_if_icmpge: |
duke@435 | 665 | case Bytecodes::_if_icmpgt: |
duke@435 | 666 | case Bytecodes::_if_icmple: |
duke@435 | 667 | case Bytecodes::_if_acmpeq: |
duke@435 | 668 | case Bytecodes::_if_acmpne: |
duke@435 | 669 | case Bytecodes::_ifnull: |
duke@435 | 670 | case Bytecodes::_ifnonnull: |
duke@435 | 671 | cell_count = BranchData::static_cell_count(); |
duke@435 | 672 | tag = DataLayout::branch_data_tag; |
duke@435 | 673 | break; |
duke@435 | 674 | case Bytecodes::_lookupswitch: |
duke@435 | 675 | case Bytecodes::_tableswitch: |
duke@435 | 676 | cell_count = MultiBranchData::compute_cell_count(stream); |
duke@435 | 677 | tag = DataLayout::multi_branch_data_tag; |
duke@435 | 678 | break; |
duke@435 | 679 | } |
duke@435 | 680 | assert(tag == DataLayout::multi_branch_data_tag || |
duke@435 | 681 | cell_count == bytecode_cell_count(c), "cell counts must agree"); |
duke@435 | 682 | if (cell_count >= 0) { |
duke@435 | 683 | assert(tag != DataLayout::no_tag, "bad tag"); |
duke@435 | 684 | assert(bytecode_has_profile(c), "agree w/ BHP"); |
duke@435 | 685 | data_layout->initialize(tag, stream->bci(), cell_count); |
duke@435 | 686 | return DataLayout::compute_size_in_bytes(cell_count); |
duke@435 | 687 | } else { |
duke@435 | 688 | assert(!bytecode_has_profile(c), "agree w/ !BHP"); |
duke@435 | 689 | return 0; |
duke@435 | 690 | } |
duke@435 | 691 | } |
duke@435 | 692 | |
duke@435 | 693 | // Get the data at an arbitrary (sort of) data index. |
duke@435 | 694 | ProfileData* methodDataOopDesc::data_at(int data_index) { |
duke@435 | 695 | if (out_of_bounds(data_index)) { |
duke@435 | 696 | return NULL; |
duke@435 | 697 | } |
duke@435 | 698 | DataLayout* data_layout = data_layout_at(data_index); |
ysr@1376 | 699 | return data_layout->data_in(); |
ysr@1376 | 700 | } |
duke@435 | 701 | |
ysr@1376 | 702 | ProfileData* DataLayout::data_in() { |
ysr@1376 | 703 | switch (tag()) { |
duke@435 | 704 | case DataLayout::no_tag: |
duke@435 | 705 | default: |
duke@435 | 706 | ShouldNotReachHere(); |
duke@435 | 707 | return NULL; |
duke@435 | 708 | case DataLayout::bit_data_tag: |
ysr@1376 | 709 | return new BitData(this); |
duke@435 | 710 | case DataLayout::counter_data_tag: |
ysr@1376 | 711 | return new CounterData(this); |
duke@435 | 712 | case DataLayout::jump_data_tag: |
ysr@1376 | 713 | return new JumpData(this); |
duke@435 | 714 | case DataLayout::receiver_type_data_tag: |
ysr@1376 | 715 | return new ReceiverTypeData(this); |
duke@435 | 716 | case DataLayout::virtual_call_data_tag: |
ysr@1376 | 717 | return new VirtualCallData(this); |
duke@435 | 718 | case DataLayout::ret_data_tag: |
ysr@1376 | 719 | return new RetData(this); |
duke@435 | 720 | case DataLayout::branch_data_tag: |
ysr@1376 | 721 | return new BranchData(this); |
duke@435 | 722 | case DataLayout::multi_branch_data_tag: |
ysr@1376 | 723 | return new MultiBranchData(this); |
kvn@480 | 724 | case DataLayout::arg_info_data_tag: |
ysr@1376 | 725 | return new ArgInfoData(this); |
duke@435 | 726 | }; |
duke@435 | 727 | } |
duke@435 | 728 | |
duke@435 | 729 | // Iteration over data. |
duke@435 | 730 | ProfileData* methodDataOopDesc::next_data(ProfileData* current) { |
duke@435 | 731 | int current_index = dp_to_di(current->dp()); |
duke@435 | 732 | int next_index = current_index + current->size_in_bytes(); |
duke@435 | 733 | ProfileData* next = data_at(next_index); |
duke@435 | 734 | return next; |
duke@435 | 735 | } |
duke@435 | 736 | |
duke@435 | 737 | // Give each of the data entries a chance to perform specific |
duke@435 | 738 | // data initialization. |
duke@435 | 739 | void methodDataOopDesc::post_initialize(BytecodeStream* stream) { |
duke@435 | 740 | ResourceMark rm; |
duke@435 | 741 | ProfileData* data; |
duke@435 | 742 | for (data = first_data(); is_valid(data); data = next_data(data)) { |
duke@435 | 743 | stream->set_start(data->bci()); |
duke@435 | 744 | stream->next(); |
duke@435 | 745 | data->post_initialize(stream, this); |
duke@435 | 746 | } |
duke@435 | 747 | } |
duke@435 | 748 | |
duke@435 | 749 | // Initialize the methodDataOop corresponding to a given method. |
duke@435 | 750 | void methodDataOopDesc::initialize(methodHandle method) { |
duke@435 | 751 | ResourceMark rm; |
duke@435 | 752 | // Set the method back-pointer. |
duke@435 | 753 | _method = method(); |
iveresov@2138 | 754 | |
iveresov@2138 | 755 | if (TieredCompilation) { |
iveresov@2138 | 756 | _invocation_counter.init(); |
iveresov@2138 | 757 | _backedge_counter.init(); |
iveresov@2138 | 758 | _num_loops = 0; |
iveresov@2138 | 759 | _num_blocks = 0; |
iveresov@2138 | 760 | _highest_comp_level = 0; |
iveresov@2138 | 761 | _highest_osr_comp_level = 0; |
iveresov@2138 | 762 | _would_profile = false; |
iveresov@2138 | 763 | } |
duke@435 | 764 | set_creation_mileage(mileage_of(method())); |
duke@435 | 765 | |
duke@435 | 766 | // Initialize flags and trap history. |
duke@435 | 767 | _nof_decompiles = 0; |
duke@435 | 768 | _nof_overflow_recompiles = 0; |
duke@435 | 769 | _nof_overflow_traps = 0; |
duke@435 | 770 | assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); |
duke@435 | 771 | Copy::zero_to_words((HeapWord*) &_trap_hist, |
duke@435 | 772 | sizeof(_trap_hist) / sizeof(HeapWord)); |
duke@435 | 773 | |
duke@435 | 774 | // Go through the bytecodes and allocate and initialize the |
duke@435 | 775 | // corresponding data cells. |
duke@435 | 776 | int data_size = 0; |
duke@435 | 777 | int empty_bc_count = 0; // number of bytecodes lacking data |
duke@435 | 778 | BytecodeStream stream(method); |
duke@435 | 779 | Bytecodes::Code c; |
duke@435 | 780 | while ((c = stream.next()) >= 0) { |
duke@435 | 781 | int size_in_bytes = initialize_data(&stream, data_size); |
duke@435 | 782 | data_size += size_in_bytes; |
duke@435 | 783 | if (size_in_bytes == 0) empty_bc_count += 1; |
duke@435 | 784 | } |
duke@435 | 785 | _data_size = data_size; |
duke@435 | 786 | int object_size = in_bytes(data_offset()) + data_size; |
duke@435 | 787 | |
duke@435 | 788 | // Add some extra DataLayout cells (at least one) to track stray traps. |
duke@435 | 789 | int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); |
kvn@480 | 790 | int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
kvn@480 | 791 | |
kvn@480 | 792 | // Add a cell to record information about modified arguments. |
kvn@480 | 793 | // Set up _args_modified array after traps cells so that |
kvn@480 | 794 | // the code for traps cells works. |
kvn@480 | 795 | DataLayout *dp = data_layout_at(data_size + extra_size); |
kvn@480 | 796 | |
kvn@480 | 797 | int arg_size = method->size_of_parameters(); |
kvn@480 | 798 | dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
kvn@480 | 799 | |
kvn@480 | 800 | object_size += extra_size + DataLayout::compute_size_in_bytes(arg_size+1); |
duke@435 | 801 | |
duke@435 | 802 | // Set an initial hint. Don't use set_hint_di() because |
duke@435 | 803 | // first_di() may be out of bounds if data_size is 0. |
duke@435 | 804 | // In that situation, _hint_di is never used, but at |
duke@435 | 805 | // least well-defined. |
duke@435 | 806 | _hint_di = first_di(); |
duke@435 | 807 | |
duke@435 | 808 | post_initialize(&stream); |
duke@435 | 809 | |
duke@435 | 810 | set_object_is_parsable(object_size); |
duke@435 | 811 | } |
duke@435 | 812 | |
duke@435 | 813 | // Get a measure of how much mileage the method has on it. |
duke@435 | 814 | int methodDataOopDesc::mileage_of(methodOop method) { |
duke@435 | 815 | int mileage = 0; |
iveresov@2138 | 816 | if (TieredCompilation) { |
iveresov@2138 | 817 | mileage = MAX2(method->invocation_count(), method->backedge_count()); |
iveresov@2138 | 818 | } else { |
iveresov@2138 | 819 | int iic = method->interpreter_invocation_count(); |
iveresov@2138 | 820 | if (mileage < iic) mileage = iic; |
iveresov@2138 | 821 | InvocationCounter* ic = method->invocation_counter(); |
iveresov@2138 | 822 | InvocationCounter* bc = method->backedge_counter(); |
iveresov@2138 | 823 | int icval = ic->count(); |
iveresov@2138 | 824 | if (ic->carry()) icval += CompileThreshold; |
iveresov@2138 | 825 | if (mileage < icval) mileage = icval; |
iveresov@2138 | 826 | int bcval = bc->count(); |
iveresov@2138 | 827 | if (bc->carry()) bcval += CompileThreshold; |
iveresov@2138 | 828 | if (mileage < bcval) mileage = bcval; |
iveresov@2138 | 829 | } |
duke@435 | 830 | return mileage; |
duke@435 | 831 | } |
duke@435 | 832 | |
duke@435 | 833 | bool methodDataOopDesc::is_mature() const { |
iveresov@2138 | 834 | return CompilationPolicy::policy()->is_mature(_method); |
duke@435 | 835 | } |
duke@435 | 836 | |
duke@435 | 837 | // Translate a bci to its corresponding data index (di). |
duke@435 | 838 | address methodDataOopDesc::bci_to_dp(int bci) { |
duke@435 | 839 | ResourceMark rm; |
duke@435 | 840 | ProfileData* data = data_before(bci); |
duke@435 | 841 | ProfileData* prev = NULL; |
duke@435 | 842 | for ( ; is_valid(data); data = next_data(data)) { |
duke@435 | 843 | if (data->bci() >= bci) { |
duke@435 | 844 | if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); |
duke@435 | 845 | else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); |
duke@435 | 846 | return data->dp(); |
duke@435 | 847 | } |
duke@435 | 848 | prev = data; |
duke@435 | 849 | } |
duke@435 | 850 | return (address)limit_data_position(); |
duke@435 | 851 | } |
duke@435 | 852 | |
duke@435 | 853 | // Translate a bci to its corresponding data, or NULL. |
duke@435 | 854 | ProfileData* methodDataOopDesc::bci_to_data(int bci) { |
duke@435 | 855 | ProfileData* data = data_before(bci); |
duke@435 | 856 | for ( ; is_valid(data); data = next_data(data)) { |
duke@435 | 857 | if (data->bci() == bci) { |
duke@435 | 858 | set_hint_di(dp_to_di(data->dp())); |
duke@435 | 859 | return data; |
duke@435 | 860 | } else if (data->bci() > bci) { |
duke@435 | 861 | break; |
duke@435 | 862 | } |
duke@435 | 863 | } |
duke@435 | 864 | return bci_to_extra_data(bci, false); |
duke@435 | 865 | } |
duke@435 | 866 | |
duke@435 | 867 | // Translate a bci to its corresponding extra data, or NULL. |
duke@435 | 868 | ProfileData* methodDataOopDesc::bci_to_extra_data(int bci, bool create_if_missing) { |
duke@435 | 869 | DataLayout* dp = extra_data_base(); |
duke@435 | 870 | DataLayout* end = extra_data_limit(); |
duke@435 | 871 | DataLayout* avail = NULL; |
duke@435 | 872 | for (; dp < end; dp = next_extra(dp)) { |
duke@435 | 873 | // No need for "OrderAccess::load_acquire" ops, |
duke@435 | 874 | // since the data structure is monotonic. |
duke@435 | 875 | if (dp->tag() == DataLayout::no_tag) break; |
kvn@480 | 876 | if (dp->tag() == DataLayout::arg_info_data_tag) { |
kvn@480 | 877 | dp = end; // ArgInfoData is at the end of extra data section. |
kvn@480 | 878 | break; |
kvn@480 | 879 | } |
duke@435 | 880 | if (dp->bci() == bci) { |
duke@435 | 881 | assert(dp->tag() == DataLayout::bit_data_tag, "sane"); |
duke@435 | 882 | return new BitData(dp); |
duke@435 | 883 | } |
duke@435 | 884 | } |
duke@435 | 885 | if (create_if_missing && dp < end) { |
duke@435 | 886 | // Allocate this one. There is no mutual exclusion, |
duke@435 | 887 | // so two threads could allocate different BCIs to the |
duke@435 | 888 | // same data layout. This means these extra data |
duke@435 | 889 | // records, like most other MDO contents, must not be |
duke@435 | 890 | // trusted too much. |
duke@435 | 891 | DataLayout temp; |
duke@435 | 892 | temp.initialize(DataLayout::bit_data_tag, bci, 0); |
duke@435 | 893 | dp->release_set_header(temp.header()); |
duke@435 | 894 | assert(dp->tag() == DataLayout::bit_data_tag, "sane"); |
duke@435 | 895 | //NO: assert(dp->bci() == bci, "no concurrent allocation"); |
duke@435 | 896 | return new BitData(dp); |
duke@435 | 897 | } |
duke@435 | 898 | return NULL; |
duke@435 | 899 | } |
duke@435 | 900 | |
kvn@480 | 901 | ArgInfoData *methodDataOopDesc::arg_info() { |
kvn@480 | 902 | DataLayout* dp = extra_data_base(); |
kvn@480 | 903 | DataLayout* end = extra_data_limit(); |
kvn@480 | 904 | for (; dp < end; dp = next_extra(dp)) { |
kvn@480 | 905 | if (dp->tag() == DataLayout::arg_info_data_tag) |
kvn@480 | 906 | return new ArgInfoData(dp); |
kvn@480 | 907 | } |
kvn@480 | 908 | return NULL; |
kvn@480 | 909 | } |
kvn@480 | 910 | |
duke@435 | 911 | #ifndef PRODUCT |
duke@435 | 912 | void methodDataOopDesc::print_data_on(outputStream* st) { |
duke@435 | 913 | ResourceMark rm; |
duke@435 | 914 | ProfileData* data = first_data(); |
duke@435 | 915 | for ( ; is_valid(data); data = next_data(data)) { |
duke@435 | 916 | st->print("%d", dp_to_di(data->dp())); |
duke@435 | 917 | st->fill_to(6); |
duke@435 | 918 | data->print_data_on(st); |
duke@435 | 919 | } |
kvn@480 | 920 | st->print_cr("--- Extra data:"); |
duke@435 | 921 | DataLayout* dp = extra_data_base(); |
duke@435 | 922 | DataLayout* end = extra_data_limit(); |
duke@435 | 923 | for (; dp < end; dp = next_extra(dp)) { |
duke@435 | 924 | // No need for "OrderAccess::load_acquire" ops, |
duke@435 | 925 | // since the data structure is monotonic. |
kvn@480 | 926 | if (dp->tag() == DataLayout::no_tag) continue; |
kvn@480 | 927 | if (dp->tag() == DataLayout::bit_data_tag) { |
kvn@480 | 928 | data = new BitData(dp); |
kvn@480 | 929 | } else { |
kvn@480 | 930 | assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
kvn@480 | 931 | data = new ArgInfoData(dp); |
kvn@480 | 932 | dp = end; // ArgInfoData is at the end of extra data section. |
kvn@480 | 933 | } |
duke@435 | 934 | st->print("%d", dp_to_di(data->dp())); |
duke@435 | 935 | st->fill_to(6); |
duke@435 | 936 | data->print_data_on(st); |
duke@435 | 937 | } |
duke@435 | 938 | } |
duke@435 | 939 | #endif |
duke@435 | 940 | |
duke@435 | 941 | void methodDataOopDesc::verify_data_on(outputStream* st) { |
duke@435 | 942 | NEEDS_CLEANUP; |
duke@435 | 943 | // not yet implemented. |
duke@435 | 944 | } |