6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "asm/assembler.inline.hpp"
26 #include "code/codeCache.hpp"
27 #include "code/compiledIC.hpp"
28 #include "code/dependencies.hpp"
29 #include "code/nativeInst.hpp"
30 #include "code/nmethod.inline.hpp"
31 #include "code/relocInfo.hpp"
32 #include "code/scopeDesc.hpp"
33 #include "compiler/abstractCompiler.hpp"
34 #include "compiler/compilationLog.hpp"
35 #include "compiler/compileBroker.hpp"
36 #include "compiler/compileLog.hpp"
37 #include "compiler/compileTask.hpp"
38 #include "compiler/compilerDirectives.hpp"
39 #include "compiler/compilerOracle.hpp"
40 #include "compiler/directivesParser.hpp"
41 #include "compiler/disassembler.hpp"
42 #include "compiler/oopMap.inline.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/barrierSetNMethod.hpp"
45 #include "gc/shared/classUnloadingContext.hpp"
771
772 void nmethod::clear_inline_caches() {
773 assert(SafepointSynchronize::is_at_safepoint(), "clearing of IC's only allowed at safepoint");
774 RelocIterator iter(this);
775 while (iter.next()) {
776 iter.reloc()->clear_inline_cache();
777 }
778 }
779
780 #ifdef ASSERT
781 // Check class_loader is alive for this bit of metadata.
782 class CheckClass : public MetadataClosure {
783 void do_metadata(Metadata* md) {
784 Klass* klass = nullptr;
785 if (md->is_klass()) {
786 klass = ((Klass*)md);
787 } else if (md->is_method()) {
788 klass = ((Method*)md)->method_holder();
789 } else if (md->is_methodData()) {
790 klass = ((MethodData*)md)->method()->method_holder();
791 } else {
792 md->print();
793 ShouldNotReachHere();
794 }
795 assert(klass->is_loader_alive(), "must be alive");
796 }
797 };
798 #endif // ASSERT
799
800
801 static void clean_ic_if_metadata_is_dead(CompiledIC *ic) {
802 ic->clean_metadata();
803 }
804
805 // Clean references to unloaded nmethods at addr from this one, which is not unloaded.
806 template <typename CallsiteT>
807 static void clean_if_nmethod_is_unloaded(CallsiteT* callsite, nmethod* from,
808 bool clean_all) {
809 CodeBlob* cb = CodeCache::find_blob(callsite->destination());
810 if (!cb->is_nmethod()) {
1115 nm = new (native_nmethod_size, allow_NonNMethod_space)
1116 nmethod(method(), compiler_none, native_nmethod_size,
1117 compile_id, &offsets,
1118 code_buffer, frame_size,
1119 basic_lock_owner_sp_offset,
1120 basic_lock_sp_offset,
1121 oop_maps, mutable_data_size);
1122 DEBUG_ONLY( if (allow_NonNMethod_space) assert_no_oops_or_metadata(nm); )
1123 NOT_PRODUCT(if (nm != nullptr) native_nmethod_stats.note_native_nmethod(nm));
1124 }
1125
1126 if (nm != nullptr) {
1127 // verify nmethod
1128 DEBUG_ONLY(nm->verify();) // might block
1129
1130 nm->log_new_nmethod();
1131 }
1132 return nm;
1133 }
1134
1135 nmethod* nmethod::new_nmethod(const methodHandle& method,
1136 int compile_id,
1137 int entry_bci,
1138 CodeOffsets* offsets,
1139 int orig_pc_offset,
1140 DebugInformationRecorder* debug_info,
1141 Dependencies* dependencies,
1142 CodeBuffer* code_buffer, int frame_size,
1143 OopMapSet* oop_maps,
1144 ExceptionHandlerTable* handler_table,
1145 ImplicitExceptionTable* nul_chk_table,
1146 AbstractCompiler* compiler,
1147 CompLevel comp_level
1148 #if INCLUDE_JVMCI
1149 , char* speculations,
1150 int speculations_len,
1151 JVMCINMethodData* jvmci_data
1152 #endif
1153 )
1154 {
1155 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
1156 code_buffer->finalize_oop_references(method);
1157 // create nmethod
1158 nmethod* nm = nullptr;
1159 int nmethod_size = CodeBlob::allocation_size(code_buffer, sizeof(nmethod));
1160
1161 int immutable_data_size =
1162 adjust_pcs_size(debug_info->pcs_size())
1163 + align_up((int)dependencies->size_in_bytes(), oopSize)
1164 + align_up(handler_table->size_in_bytes() , oopSize)
1165 + align_up(nul_chk_table->size_in_bytes() , oopSize)
1166 #if INCLUDE_JVMCI
1167 + align_up(speculations_len , oopSize)
1171 // First, allocate space for immutable data in C heap.
1172 address immutable_data = nullptr;
1173 if (immutable_data_size > 0) {
1174 immutable_data = (address)os::malloc(immutable_data_size, mtCode);
1175 if (immutable_data == nullptr) {
1176 vm_exit_out_of_memory(immutable_data_size, OOM_MALLOC_ERROR, "nmethod: no space for immutable data");
1177 return nullptr;
1178 }
1179 }
1180
1181 int mutable_data_size = required_mutable_data_size(code_buffer
1182 JVMCI_ONLY(COMMA (compiler->is_jvmci() ? jvmci_data->size() : 0)));
1183
1184 {
1185 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1186
1187 nm = new (nmethod_size, comp_level)
1188 nmethod(method(), compiler->type(), nmethod_size, immutable_data_size, mutable_data_size,
1189 compile_id, entry_bci, immutable_data, offsets, orig_pc_offset,
1190 debug_info, dependencies, code_buffer, frame_size, oop_maps,
1191 handler_table, nul_chk_table, compiler, comp_level
1192 #if INCLUDE_JVMCI
1193 , speculations,
1194 speculations_len,
1195 jvmci_data
1196 #endif
1197 );
1198
1199 if (nm != nullptr) {
1200 // To make dependency checking during class loading fast, record
1201 // the nmethod dependencies in the classes it is dependent on.
1202 // This allows the dependency checking code to simply walk the
1203 // class hierarchy above the loaded class, checking only nmethods
1204 // which are dependent on those classes. The slow way is to
1205 // check every nmethod for dependencies which makes it linear in
1206 // the number of methods compiled. For applications with a lot
1207 // classes the slow way is too slow.
1208 for (Dependencies::DepStream deps(nm); deps.next(); ) {
1209 if (deps.type() == Dependencies::call_site_target_value) {
1210 // CallSite dependencies are managed on per-CallSite instance basis.
1211 oop call_site = deps.argument_oop(0);
1212 MethodHandles::add_dependent_nmethod(call_site, nm);
1213 } else {
1214 InstanceKlass* ik = deps.context_type();
1215 if (ik == nullptr) {
1216 continue; // ignore things like evol_method
1217 }
1218 // record this nmethod as dependent on this klass
1219 ik->add_dependent_nmethod(nm);
1220 }
1221 }
1222 NOT_PRODUCT(if (nm != nullptr) note_java_nmethod(nm));
1223 }
1224 }
1225 // Do verification and logging outside CodeCache_lock.
1226 if (nm != nullptr) {
1227 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet.
1228 DEBUG_ONLY(nm->verify();)
1229 nm->log_new_nmethod();
1230 }
1231 return nm;
1232 }
1233
1234 // Fill in default values for various fields
1235 void nmethod::init_defaults(CodeBuffer *code_buffer, CodeOffsets* offsets) {
1236 // avoid uninitialized fields, even for short time periods
1237 _exception_cache = nullptr;
1238 _gc_data = nullptr;
1239 _oops_do_mark_link = nullptr;
1240 _compiled_ic_data = nullptr;
1241
1242 _is_unloading_state = 0;
1243 _state = not_installed;
1244
1245 _has_unsafe_access = 0;
1246 _has_method_handle_invokes = 0;
1247 _has_wide_vectors = 0;
1248 _has_monitors = 0;
1249 _has_scoped_access = 0;
1250 _has_flushed_dependencies = 0;
1251 _is_unlinked = 0;
1252 _load_reported = 0; // jvmti state
1253
1254 _deoptimization_status = not_marked;
1255
1256 // SECT_CONSTS is first in code buffer so the offset should be 0.
1257 int consts_offset = code_buffer->total_offset_of(code_buffer->consts());
1258 assert(consts_offset == 0, "const_offset: %d", consts_offset);
1259
1260 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs());
1261
1262 CHECKED_CAST(_entry_offset, uint16_t, (offsets->value(CodeOffsets::Entry)));
1263 CHECKED_CAST(_verified_entry_offset, uint16_t, (offsets->value(CodeOffsets::Verified_Entry)));
1264
1265 _skipped_instructions_size = code_buffer->total_skipped_instructions_size();
1266 }
1267
1268 // Post initialization
1269 void nmethod::post_init() {
1270 clear_unloading_state();
1271
1272 finalize_relocations();
1273
1306
1307 _osr_entry_point = nullptr;
1308 _pc_desc_container = nullptr;
1309 _entry_bci = InvocationEntryBci;
1310 _compile_id = compile_id;
1311 _comp_level = CompLevel_none;
1312 _compiler_type = type;
1313 _orig_pc_offset = 0;
1314 _num_stack_arg_slots = 0;
1315
1316 if (offsets->value(CodeOffsets::Exceptions) != -1) {
1317 // Continuation enter intrinsic
1318 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions);
1319 } else {
1320 _exception_offset = 0;
1321 }
1322 // Native wrappers do not have deopt handlers. Make the values
1323 // something that will never match a pc like the nmethod vtable entry
1324 _deopt_handler_offset = 0;
1325 _deopt_mh_handler_offset = 0;
1326 _unwind_handler_offset = 0;
1327
1328 CHECKED_CAST(_oops_size, uint16_t, align_up(code_buffer->total_oop_size(), oopSize));
1329 uint16_t metadata_size;
1330 CHECKED_CAST(metadata_size, uint16_t, align_up(code_buffer->total_metadata_size(), wordSize));
1331 JVMCI_ONLY( _metadata_size = metadata_size; )
1332 assert(_mutable_data_size == _relocation_size + metadata_size,
1333 "wrong mutable data size: %d != %d + %d",
1334 _mutable_data_size, _relocation_size, metadata_size);
1335
1336 // native wrapper does not have read-only data but we need unique not null address
1337 _immutable_data = blob_end();
1338 _immutable_data_size = 0;
1339 _nul_chk_table_offset = 0;
1340 _handler_table_offset = 0;
1341 _scopes_pcs_offset = 0;
1342 _scopes_data_offset = 0;
1343 #if INCLUDE_JVMCI
1344 _speculations_offset = 0;
1345 #endif
1365 // This is both handled in decode2(), called via print_code() -> decode()
1366 if (PrintNativeNMethods) {
1367 tty->print_cr("-------------------------- Assembly (native nmethod) ---------------------------");
1368 print_code();
1369 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1370 #if defined(SUPPORT_DATA_STRUCTS)
1371 if (AbstractDisassembler::show_structs()) {
1372 if (oop_maps != nullptr) {
1373 tty->print("oop maps:"); // oop_maps->print_on(tty) outputs a cr() at the beginning
1374 oop_maps->print_on(tty);
1375 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1376 }
1377 }
1378 #endif
1379 } else {
1380 print(); // print the header part only.
1381 }
1382 #if defined(SUPPORT_DATA_STRUCTS)
1383 if (AbstractDisassembler::show_structs()) {
1384 if (PrintRelocations) {
1385 print_relocations();
1386 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1387 }
1388 }
1389 #endif
1390 if (xtty != nullptr) {
1391 xtty->tail("print_native_nmethod");
1392 }
1393 }
1394 }
1395
1396 void* nmethod::operator new(size_t size, int nmethod_size, int comp_level) throw () {
1397 return CodeCache::allocate(nmethod_size, CodeCache::get_code_blob_type(comp_level));
1398 }
1399
1400 void* nmethod::operator new(size_t size, int nmethod_size, bool allow_NonNMethod_space) throw () {
1401 // Try MethodNonProfiled and MethodProfiled.
1402 void* return_value = CodeCache::allocate(nmethod_size, CodeBlobType::MethodNonProfiled);
1403 if (return_value != nullptr || !allow_NonNMethod_space) return return_value;
1404 // Try NonNMethod or give up.
1405 return CodeCache::allocate(nmethod_size, CodeBlobType::NonNMethod);
1409 nmethod::nmethod(
1410 Method* method,
1411 CompilerType type,
1412 int nmethod_size,
1413 int immutable_data_size,
1414 int mutable_data_size,
1415 int compile_id,
1416 int entry_bci,
1417 address immutable_data,
1418 CodeOffsets* offsets,
1419 int orig_pc_offset,
1420 DebugInformationRecorder* debug_info,
1421 Dependencies* dependencies,
1422 CodeBuffer *code_buffer,
1423 int frame_size,
1424 OopMapSet* oop_maps,
1425 ExceptionHandlerTable* handler_table,
1426 ImplicitExceptionTable* nul_chk_table,
1427 AbstractCompiler* compiler,
1428 CompLevel comp_level
1429 #if INCLUDE_JVMCI
1430 , char* speculations,
1431 int speculations_len,
1432 JVMCINMethodData* jvmci_data
1433 #endif
1434 )
1435 : CodeBlob("nmethod", CodeBlobKind::Nmethod, code_buffer, nmethod_size, sizeof(nmethod),
1436 offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps, false, mutable_data_size),
1437 _deoptimization_generation(0),
1438 _gc_epoch(CodeCache::gc_epoch()),
1439 _method(method),
1440 _osr_link(nullptr)
1441 {
1442 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
1443 {
1444 DEBUG_ONLY(NoSafepointVerifier nsv;)
1445 assert_locked_or_safepoint(CodeCache_lock);
1446
1447 init_defaults(code_buffer, offsets);
1448
1449 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry);
1450 _entry_bci = entry_bci;
1451 _compile_id = compile_id;
1452 _comp_level = comp_level;
1453 _compiler_type = type;
1454 _orig_pc_offset = orig_pc_offset;
1455
1456 _num_stack_arg_slots = entry_bci != InvocationEntryBci ? 0 : _method->constMethod()->num_stack_arg_slots();
1457
1458 set_ctable_begin(header_begin() + content_offset());
1459
1460 #if INCLUDE_JVMCI
1461 if (compiler->is_jvmci()) {
1462 // JVMCI might not produce any stub sections
1463 if (offsets->value(CodeOffsets::Exceptions) != -1) {
1464 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions);
1465 } else {
1466 _exception_offset = -1;
1467 }
1558 #if INCLUDE_JVMCI
1559 // Copy speculations to nmethod
1560 if (speculations_size() != 0) {
1561 memcpy(speculations_begin(), speculations, speculations_len);
1562 }
1563 #endif
1564
1565 post_init();
1566
1567 // we use the information of entry points to find out if a method is
1568 // static or non static
1569 assert(compiler->is_c2() || compiler->is_jvmci() ||
1570 _method->is_static() == (entry_point() == verified_entry_point()),
1571 " entry points must be same for static methods and vice versa");
1572 }
1573 }
1574
1575 // Print a short set of xml attributes to identify this nmethod. The
1576 // output should be embedded in some other element.
1577 void nmethod::log_identity(xmlStream* log) const {
1578 log->print(" compile_id='%d'", compile_id());
1579 const char* nm_kind = compile_kind();
1580 if (nm_kind != nullptr) log->print(" compile_kind='%s'", nm_kind);
1581 log->print(" compiler='%s'", compiler_name());
1582 if (TieredCompilation) {
1583 log->print(" level='%d'", comp_level());
1584 }
1585 #if INCLUDE_JVMCI
1586 if (jvmci_nmethod_data() != nullptr) {
1587 const char* jvmci_name = jvmci_nmethod_data()->name();
1588 if (jvmci_name != nullptr) {
1589 log->print(" jvmci_mirror_name='");
1590 log->text("%s", jvmci_name);
1591 log->print("'");
1592 }
1593 }
1594 #endif
1595 }
1596
1597
1598 #define LOG_OFFSET(log, name) \
1599 if (p2i(name##_end()) - p2i(name##_begin())) \
1600 log->print(" " XSTR(name) "_offset='%zd'" , \
1601 p2i(name##_begin()) - p2i(this))
1602
1603
1688 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1689 if (oop_maps() != nullptr) {
1690 tty->print("oop maps:"); // oop_maps()->print_on(tty) outputs a cr() at the beginning
1691 oop_maps()->print_on(tty);
1692 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1693 }
1694 }
1695 #endif
1696 } else {
1697 print(); // print the header part only.
1698 }
1699
1700 #if defined(SUPPORT_DATA_STRUCTS)
1701 if (AbstractDisassembler::show_structs()) {
1702 methodHandle mh(Thread::current(), _method);
1703 if (printmethod || PrintDebugInfo || CompilerOracle::has_option(mh, CompileCommandEnum::PrintDebugInfo)) {
1704 print_scopes();
1705 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1706 }
1707 if (printmethod || PrintRelocations || CompilerOracle::has_option(mh, CompileCommandEnum::PrintRelocations)) {
1708 print_relocations();
1709 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1710 }
1711 if (printmethod || PrintDependencies || CompilerOracle::has_option(mh, CompileCommandEnum::PrintDependencies)) {
1712 print_dependencies_on(tty);
1713 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1714 }
1715 if (printmethod || PrintExceptionHandlers) {
1716 print_handler_table();
1717 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1718 print_nul_chk_table();
1719 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1720 }
1721
1722 if (printmethod) {
1723 print_recorded_oops();
1724 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1725 print_recorded_metadata();
1726 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1727 }
1728 }
1729 #endif
1730
1731 if (xtty != nullptr) {
1732 xtty->tail("print_nmethod");
1733 }
1734 }
1735
1736
1737 // Promote one word from an assembly-time handle to a live embedded oop.
1738 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) {
1739 if (handle == nullptr ||
1740 // As a special case, IC oops are initialized to 1 or -1.
1741 handle == (jobject) Universe::non_oop_word()) {
1742 *(void**)dest = handle;
1743 } else {
1744 *dest = JNIHandles::resolve_non_null(handle);
1745 }
1746 }
1747
1748
1749 // Have to have the same name because it's called by a template
1750 void nmethod::copy_values(GrowableArray<jobject>* array) {
1751 int length = array->length();
1752 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough");
1753 oop* dest = oops_begin();
1754 for (int index = 0 ; index < length; index++) {
1755 initialize_immediate_oop(&dest[index], array->at(index));
1756 }
1757
1758 // Now we can fix up all the oops in the code. We need to do this
1759 // in the code because the assembler uses jobjects as placeholders.
1760 // The code and relocations have already been initialized by the
1761 // CodeBlob constructor, so it is valid even at this early point to
1762 // iterate over relocations and patch the code.
1763 fix_oop_relocations(nullptr, nullptr, /*initialize_immediates=*/ true);
1764 }
1765
1766 void nmethod::copy_values(GrowableArray<Metadata*>* array) {
1767 int length = array->length();
1775 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) {
1776 // re-patch all oop-bearing instructions, just in case some oops moved
1777 RelocIterator iter(this, begin, end);
1778 while (iter.next()) {
1779 if (iter.type() == relocInfo::oop_type) {
1780 oop_Relocation* reloc = iter.oop_reloc();
1781 if (initialize_immediates && reloc->oop_is_immediate()) {
1782 oop* dest = reloc->oop_addr();
1783 jobject obj = *reinterpret_cast<jobject*>(dest);
1784 initialize_immediate_oop(dest, obj);
1785 }
1786 // Refresh the oop-related bits of this instruction.
1787 reloc->fix_oop_relocation();
1788 } else if (iter.type() == relocInfo::metadata_type) {
1789 metadata_Relocation* reloc = iter.metadata_reloc();
1790 reloc->fix_metadata_relocation();
1791 }
1792 }
1793 }
1794
1795 static void install_post_call_nop_displacement(nmethod* nm, address pc) {
1796 NativePostCallNop* nop = nativePostCallNop_at((address) pc);
1797 intptr_t cbaddr = (intptr_t) nm;
1798 intptr_t offset = ((intptr_t) pc) - cbaddr;
1799
1800 int oopmap_slot = nm->oop_maps()->find_slot_for_offset(int((intptr_t) pc - (intptr_t) nm->code_begin()));
1801 if (oopmap_slot < 0) { // this can happen at asynchronous (non-safepoint) stackwalks
1802 log_debug(codecache)("failed to find oopmap for cb: " INTPTR_FORMAT " offset: %d", cbaddr, (int) offset);
1803 } else if (!nop->patch(oopmap_slot, offset)) {
1804 log_debug(codecache)("failed to encode %d %d", oopmap_slot, (int) offset);
1805 }
1806 }
1807
1808 void nmethod::finalize_relocations() {
1809 NoSafepointVerifier nsv;
1810
1811 GrowableArray<NativeMovConstReg*> virtual_call_data;
1812
1813 // Make sure that post call nops fill in nmethod offsets eagerly so
1814 // we don't have to race with deoptimization
1936 Atomic::store(&_gc_epoch, CodeCache::gc_epoch());
1937 }
1938
1939 bool nmethod::is_maybe_on_stack() {
1940 // If the condition below is true, it means that the nmethod was found to
1941 // be alive the previous completed marking cycle.
1942 return Atomic::load(&_gc_epoch) >= CodeCache::previous_completed_gc_marking_cycle();
1943 }
1944
1945 void nmethod::inc_decompile_count() {
1946 if (!is_compiled_by_c2() && !is_compiled_by_jvmci()) return;
1947 // Could be gated by ProfileTraps, but do not bother...
1948 Method* m = method();
1949 if (m == nullptr) return;
1950 MethodData* mdo = m->method_data();
1951 if (mdo == nullptr) return;
1952 // There is a benign race here. See comments in methodData.hpp.
1953 mdo->inc_decompile_count();
1954 }
1955
1956 bool nmethod::try_transition(signed char new_state_int) {
1957 signed char new_state = new_state_int;
1958 assert_lock_strong(NMethodState_lock);
1959 signed char old_state = _state;
1960 if (old_state >= new_state) {
1961 // Ensure monotonicity of transitions.
1962 return false;
1963 }
1964 Atomic::store(&_state, new_state);
1965 return true;
1966 }
1967
1968 void nmethod::invalidate_osr_method() {
1969 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod");
1970 // Remove from list of active nmethods
1971 if (method() != nullptr) {
1972 method()->method_holder()->remove_osr_nmethod(this);
1973 }
1974 }
1975
1987 }
1988 }
1989
1990 ResourceMark rm;
1991 stringStream ss(NEW_RESOURCE_ARRAY(char, 256), 256);
1992 ss.print("made not entrant: %s", reason);
1993
1994 CompileTask::print_ul(this, ss.freeze());
1995 if (PrintCompilation) {
1996 print_on_with_msg(tty, ss.freeze());
1997 }
1998 }
1999
2000 void nmethod::unlink_from_method() {
2001 if (method() != nullptr) {
2002 method()->unlink_code(this);
2003 }
2004 }
2005
2006 // Invalidate code
2007 bool nmethod::make_not_entrant(const char* reason) {
2008 assert(reason != nullptr, "Must provide a reason");
2009
2010 // This can be called while the system is already at a safepoint which is ok
2011 NoSafepointVerifier nsv;
2012
2013 if (is_unloading()) {
2014 // If the nmethod is unloading, then it is already not entrant through
2015 // the nmethod entry barriers. No need to do anything; GC will unload it.
2016 return false;
2017 }
2018
2019 if (Atomic::load(&_state) == not_entrant) {
2020 // Avoid taking the lock if already in required state.
2021 // This is safe from races because the state is an end-state,
2022 // which the nmethod cannot back out of once entered.
2023 // No need for fencing either.
2024 return false;
2025 }
2026
2027 {
2063 }
2064
2065 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
2066 if (bs_nm == nullptr || !bs_nm->supports_entry_barrier(this)) {
2067 // If nmethod entry barriers are not supported, we won't mark
2068 // nmethods as on-stack when they become on-stack. So we
2069 // degrade to a less accurate flushing strategy, for now.
2070 mark_as_maybe_on_stack();
2071 }
2072
2073 // Change state
2074 bool success = try_transition(not_entrant);
2075 assert(success, "Transition can't fail");
2076
2077 // Log the transition once
2078 log_state_change(reason);
2079
2080 // Remove nmethod from method.
2081 unlink_from_method();
2082
2083 } // leave critical region under NMethodState_lock
2084
2085 #if INCLUDE_JVMCI
2086 // Invalidate can't occur while holding the NMethodState_lock
2087 JVMCINMethodData* nmethod_data = jvmci_nmethod_data();
2088 if (nmethod_data != nullptr) {
2089 nmethod_data->invalidate_nmethod_mirror(this);
2090 }
2091 #endif
2092
2093 #ifdef ASSERT
2094 if (is_osr_method() && method() != nullptr) {
2095 // Make sure osr nmethod is invalidated, i.e. not on the list
2096 bool found = method()->method_holder()->remove_osr_nmethod(this);
2097 assert(!found, "osr nmethod should have been invalidated");
2098 }
2099 #endif
2100
2101 return true;
2102 }
2143
2144 // completely deallocate this method
2145 Events::log_nmethod_flush(Thread::current(), "flushing %s nmethod " INTPTR_FORMAT, is_osr_method() ? "osr" : "", p2i(this));
2146 log_debug(codecache)("*flushing %s nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT
2147 "/Free CodeCache:%zuKb",
2148 is_osr_method() ? "osr" : "",_compile_id, p2i(this), CodeCache::blob_count(),
2149 CodeCache::unallocated_capacity(CodeCache::get_code_blob_type(this))/1024);
2150
2151 // We need to deallocate any ExceptionCache data.
2152 // Note that we do not need to grab the nmethod lock for this, it
2153 // better be thread safe if we're disposing of it!
2154 ExceptionCache* ec = exception_cache();
2155 while(ec != nullptr) {
2156 ExceptionCache* next = ec->next();
2157 delete ec;
2158 ec = next;
2159 }
2160 if (_pc_desc_container != nullptr) {
2161 delete _pc_desc_container;
2162 }
2163 delete[] _compiled_ic_data;
2164
2165 if (_immutable_data != blob_end()) {
2166 os::free(_immutable_data);
2167 _immutable_data = blob_end(); // Valid not null address
2168 }
2169 if (unregister_nmethod) {
2170 Universe::heap()->unregister_nmethod(this);
2171 }
2172 CodeCache::unregister_old_nmethod(this);
2173
2174 CodeBlob::purge();
2175 }
2176
2177 oop nmethod::oop_at(int index) const {
2178 if (index == 0) {
2179 return nullptr;
2180 }
2181
2182 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
2183 return bs_nm->oop_load_no_keepalive(this, index);
2184 }
2185
2206 MethodHandles::clean_dependency_context(call_site);
2207 } else {
2208 InstanceKlass* ik = deps.context_type();
2209 if (ik == nullptr) {
2210 continue; // ignore things like evol_method
2211 }
2212 // During GC liveness of dependee determines class that needs to be updated.
2213 // The GC may clean dependency contexts concurrently and in parallel.
2214 ik->clean_dependency_context();
2215 }
2216 }
2217 }
2218 }
2219
2220 void nmethod::post_compiled_method(CompileTask* task) {
2221 task->mark_success();
2222 task->set_nm_content_size(content_size());
2223 task->set_nm_insts_size(insts_size());
2224 task->set_nm_total_size(total_size());
2225
2226 // JVMTI -- compiled method notification (must be done outside lock)
2227 post_compiled_method_load_event();
2228
2229 if (CompilationLog::log() != nullptr) {
2230 CompilationLog::log()->log_nmethod(JavaThread::current(), this);
2231 }
2232
2233 const DirectiveSet* directive = task->directive();
2234 maybe_print_nmethod(directive);
2235 }
2236
2237 // ------------------------------------------------------------------
2238 // post_compiled_method_load_event
2239 // new method for install_code() path
2240 // Transfer information from compilation to jvmti
2241 void nmethod::post_compiled_method_load_event(JvmtiThreadState* state) {
2242 // This is a bad time for a safepoint. We don't want
2243 // this nmethod to get unloaded while we're queueing the event.
2244 NoSafepointVerifier nsv;
2245
2937
2938 // Make sure all the entry points are correctly aligned for patching.
2939 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point());
2940
2941 // assert(oopDesc::is_oop(method()), "must be valid");
2942
2943 ResourceMark rm;
2944
2945 if (!CodeCache::contains(this)) {
2946 fatal("nmethod at " INTPTR_FORMAT " not in zone", p2i(this));
2947 }
2948
2949 if(is_native_method() )
2950 return;
2951
2952 nmethod* nm = CodeCache::find_nmethod(verified_entry_point());
2953 if (nm != this) {
2954 fatal("find_nmethod did not find this nmethod (" INTPTR_FORMAT ")", p2i(this));
2955 }
2956
2957 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
2958 if (! p->verify(this)) {
2959 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", p2i(this));
2960 }
2961 }
2962
2963 #ifdef ASSERT
2964 #if INCLUDE_JVMCI
2965 {
2966 // Verify that implicit exceptions that deoptimize have a PcDesc and OopMap
2967 ImmutableOopMapSet* oms = oop_maps();
2968 ImplicitExceptionTable implicit_table(this);
2969 for (uint i = 0; i < implicit_table.len(); i++) {
2970 int exec_offset = (int) implicit_table.get_exec_offset(i);
2971 if (implicit_table.get_exec_offset(i) == implicit_table.get_cont_offset(i)) {
2972 assert(pc_desc_at(code_begin() + exec_offset) != nullptr, "missing PcDesc");
2973 bool found = false;
2974 for (int i = 0, imax = oms->count(); i < imax; i++) {
2975 if (oms->pair_at(i)->pc_offset() == exec_offset) {
2976 found = true;
2977 break;
2978 }
2979 }
2980 assert(found, "missing oopmap");
2981 }
2982 }
2983 }
2984 #endif
2985 #endif
2986
2987 VerifyOopsClosure voc(this);
2988 oops_do(&voc);
2989 assert(voc.ok(), "embedded oops must be OK");
2990 Universe::heap()->verify_nmethod(this);
2991
2992 assert(_oops_do_mark_link == nullptr, "_oops_do_mark_link for %s should be nullptr but is " PTR_FORMAT,
2993 nm->method()->external_name(), p2i(_oops_do_mark_link));
2994 verify_scopes();
2995
2996 CompiledICLocker nm_verify(this);
2997 VerifyMetadataClosure vmc;
2998 metadata_do(&vmc);
2999 }
3000
3001
3002 void nmethod::verify_interrupt_point(address call_site, bool is_inline_cache) {
3003
3004 // Verify IC only when nmethod installation is finished.
3005 if (!is_not_installed()) {
3006 if (CompiledICLocker::is_safe(this)) {
3007 if (is_inline_cache) {
3008 CompiledIC_at(this, call_site);
3009 } else {
3010 CompiledDirectCall::at(call_site);
3011 }
3012 } else {
3013 CompiledICLocker ml_verify(this);
3014 if (is_inline_cache) {
3143 p2i(nul_chk_table_end()),
3144 nul_chk_table_size());
3145 if (handler_table_size() > 0) st->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3146 p2i(handler_table_begin()),
3147 p2i(handler_table_end()),
3148 handler_table_size());
3149 if (scopes_pcs_size () > 0) st->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3150 p2i(scopes_pcs_begin()),
3151 p2i(scopes_pcs_end()),
3152 scopes_pcs_size());
3153 if (scopes_data_size () > 0) st->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3154 p2i(scopes_data_begin()),
3155 p2i(scopes_data_end()),
3156 scopes_data_size());
3157 #if INCLUDE_JVMCI
3158 if (speculations_size () > 0) st->print_cr(" speculations [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3159 p2i(speculations_begin()),
3160 p2i(speculations_end()),
3161 speculations_size());
3162 #endif
3163 }
3164
3165 void nmethod::print_code() {
3166 ResourceMark m;
3167 ttyLocker ttyl;
3168 // Call the specialized decode method of this class.
3169 decode(tty);
3170 }
3171
3172 #ifndef PRODUCT // called InstanceKlass methods are available only then. Declared as PRODUCT_RETURN
3173
3174 void nmethod::print_dependencies_on(outputStream* out) {
3175 ResourceMark rm;
3176 stringStream st;
3177 st.print_cr("Dependencies:");
3178 for (Dependencies::DepStream deps(this); deps.next(); ) {
3179 deps.print_dependency(&st);
3180 InstanceKlass* ctxk = deps.context_type();
3181 if (ctxk != nullptr) {
3182 if (ctxk->is_dependent_nmethod(this)) {
3242 st->print("scopes:");
3243 if (scopes_pcs_begin() < scopes_pcs_end()) {
3244 st->cr();
3245 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
3246 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null)
3247 continue;
3248
3249 ScopeDesc* sd = scope_desc_at(p->real_pc(this));
3250 while (sd != nullptr) {
3251 sd->print_on(st, p); // print output ends with a newline
3252 sd = sd->sender();
3253 }
3254 }
3255 } else {
3256 st->print_cr(" <list empty>");
3257 }
3258 }
3259 #endif
3260
3261 #ifndef PRODUCT // RelocIterator does support printing only then.
3262 void nmethod::print_relocations() {
3263 ResourceMark m; // in case methods get printed via the debugger
3264 tty->print_cr("relocations:");
3265 RelocIterator iter(this);
3266 iter.print_on(tty);
3267 }
3268 #endif
3269
3270 void nmethod::print_pcs_on(outputStream* st) {
3271 ResourceMark m; // in case methods get printed via debugger
3272 st->print("pc-bytecode offsets:");
3273 if (scopes_pcs_begin() < scopes_pcs_end()) {
3274 st->cr();
3275 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
3276 p->print_on(st, this); // print output ends with a newline
3277 }
3278 } else {
3279 st->print_cr(" <list empty>");
3280 }
3281 }
3282
3283 void nmethod::print_handler_table() {
3284 ExceptionHandlerTable(this).print(code_begin());
3285 }
3286
4052
4053 #endif // !PRODUCT
4054
4055 #if INCLUDE_JVMCI
4056 void nmethod::update_speculation(JavaThread* thread) {
4057 jlong speculation = thread->pending_failed_speculation();
4058 if (speculation != 0) {
4059 guarantee(jvmci_nmethod_data() != nullptr, "failed speculation in nmethod without failed speculation list");
4060 jvmci_nmethod_data()->add_failed_speculation(this, speculation);
4061 thread->set_pending_failed_speculation(0);
4062 }
4063 }
4064
4065 const char* nmethod::jvmci_name() {
4066 if (jvmci_nmethod_data() != nullptr) {
4067 return jvmci_nmethod_data()->name();
4068 }
4069 return nullptr;
4070 }
4071 #endif
|
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "asm/assembler.inline.hpp"
26 #include "code/aotCodeCache.hpp"
27 #include "code/codeCache.hpp"
28 #include "code/compiledIC.hpp"
29 #include "code/dependencies.hpp"
30 #include "code/nativeInst.hpp"
31 #include "code/nmethod.inline.hpp"
32 #include "code/relocInfo.hpp"
33 #include "code/scopeDesc.hpp"
34 #include "compiler/abstractCompiler.hpp"
35 #include "compiler/compilationLog.hpp"
36 #include "compiler/compileBroker.hpp"
37 #include "compiler/compileLog.hpp"
38 #include "compiler/compileTask.hpp"
39 #include "compiler/compilerDirectives.hpp"
40 #include "compiler/compilerOracle.hpp"
41 #include "compiler/directivesParser.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "compiler/oopMap.inline.hpp"
44 #include "gc/shared/barrierSet.hpp"
45 #include "gc/shared/barrierSetNMethod.hpp"
46 #include "gc/shared/classUnloadingContext.hpp"
772
773 void nmethod::clear_inline_caches() {
774 assert(SafepointSynchronize::is_at_safepoint(), "clearing of IC's only allowed at safepoint");
775 RelocIterator iter(this);
776 while (iter.next()) {
777 iter.reloc()->clear_inline_cache();
778 }
779 }
780
781 #ifdef ASSERT
782 // Check class_loader is alive for this bit of metadata.
783 class CheckClass : public MetadataClosure {
784 void do_metadata(Metadata* md) {
785 Klass* klass = nullptr;
786 if (md->is_klass()) {
787 klass = ((Klass*)md);
788 } else if (md->is_method()) {
789 klass = ((Method*)md)->method_holder();
790 } else if (md->is_methodData()) {
791 klass = ((MethodData*)md)->method()->method_holder();
792 } else if (md->is_methodCounters()) {
793 klass = ((MethodCounters*)md)->method()->method_holder();
794 } else {
795 md->print();
796 ShouldNotReachHere();
797 }
798 assert(klass->is_loader_alive(), "must be alive");
799 }
800 };
801 #endif // ASSERT
802
803
804 static void clean_ic_if_metadata_is_dead(CompiledIC *ic) {
805 ic->clean_metadata();
806 }
807
808 // Clean references to unloaded nmethods at addr from this one, which is not unloaded.
809 template <typename CallsiteT>
810 static void clean_if_nmethod_is_unloaded(CallsiteT* callsite, nmethod* from,
811 bool clean_all) {
812 CodeBlob* cb = CodeCache::find_blob(callsite->destination());
813 if (!cb->is_nmethod()) {
1118 nm = new (native_nmethod_size, allow_NonNMethod_space)
1119 nmethod(method(), compiler_none, native_nmethod_size,
1120 compile_id, &offsets,
1121 code_buffer, frame_size,
1122 basic_lock_owner_sp_offset,
1123 basic_lock_sp_offset,
1124 oop_maps, mutable_data_size);
1125 DEBUG_ONLY( if (allow_NonNMethod_space) assert_no_oops_or_metadata(nm); )
1126 NOT_PRODUCT(if (nm != nullptr) native_nmethod_stats.note_native_nmethod(nm));
1127 }
1128
1129 if (nm != nullptr) {
1130 // verify nmethod
1131 DEBUG_ONLY(nm->verify();) // might block
1132
1133 nm->log_new_nmethod();
1134 }
1135 return nm;
1136 }
1137
1138 void nmethod::record_nmethod_dependency() {
1139 // To make dependency checking during class loading fast, record
1140 // the nmethod dependencies in the classes it is dependent on.
1141 // This allows the dependency checking code to simply walk the
1142 // class hierarchy above the loaded class, checking only nmethods
1143 // which are dependent on those classes. The slow way is to
1144 // check every nmethod for dependencies which makes it linear in
1145 // the number of methods compiled. For applications with a lot
1146 // classes the slow way is too slow.
1147 for (Dependencies::DepStream deps(this); deps.next(); ) {
1148 if (deps.type() == Dependencies::call_site_target_value) {
1149 // CallSite dependencies are managed on per-CallSite instance basis.
1150 oop call_site = deps.argument_oop(0);
1151 MethodHandles::add_dependent_nmethod(call_site, this);
1152 } else {
1153 InstanceKlass* ik = deps.context_type();
1154 if (ik == nullptr) {
1155 continue; // ignore things like evol_method
1156 }
1157 // record this nmethod as dependent on this klass
1158 ik->add_dependent_nmethod(this);
1159 }
1160 }
1161 }
1162
1163 nmethod* nmethod::new_nmethod(const methodHandle& method,
1164 int compile_id,
1165 int entry_bci,
1166 CodeOffsets* offsets,
1167 int orig_pc_offset,
1168 DebugInformationRecorder* debug_info,
1169 Dependencies* dependencies,
1170 CodeBuffer* code_buffer, int frame_size,
1171 OopMapSet* oop_maps,
1172 ExceptionHandlerTable* handler_table,
1173 ImplicitExceptionTable* nul_chk_table,
1174 AbstractCompiler* compiler,
1175 CompLevel comp_level
1176 , AOTCodeEntry* aot_code_entry
1177 #if INCLUDE_JVMCI
1178 , char* speculations,
1179 int speculations_len,
1180 JVMCINMethodData* jvmci_data
1181 #endif
1182 )
1183 {
1184 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
1185 code_buffer->finalize_oop_references(method);
1186 // create nmethod
1187 nmethod* nm = nullptr;
1188 int nmethod_size = CodeBlob::allocation_size(code_buffer, sizeof(nmethod));
1189
1190 int immutable_data_size =
1191 adjust_pcs_size(debug_info->pcs_size())
1192 + align_up((int)dependencies->size_in_bytes(), oopSize)
1193 + align_up(handler_table->size_in_bytes() , oopSize)
1194 + align_up(nul_chk_table->size_in_bytes() , oopSize)
1195 #if INCLUDE_JVMCI
1196 + align_up(speculations_len , oopSize)
1200 // First, allocate space for immutable data in C heap.
1201 address immutable_data = nullptr;
1202 if (immutable_data_size > 0) {
1203 immutable_data = (address)os::malloc(immutable_data_size, mtCode);
1204 if (immutable_data == nullptr) {
1205 vm_exit_out_of_memory(immutable_data_size, OOM_MALLOC_ERROR, "nmethod: no space for immutable data");
1206 return nullptr;
1207 }
1208 }
1209
1210 int mutable_data_size = required_mutable_data_size(code_buffer
1211 JVMCI_ONLY(COMMA (compiler->is_jvmci() ? jvmci_data->size() : 0)));
1212
1213 {
1214 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1215
1216 nm = new (nmethod_size, comp_level)
1217 nmethod(method(), compiler->type(), nmethod_size, immutable_data_size, mutable_data_size,
1218 compile_id, entry_bci, immutable_data, offsets, orig_pc_offset,
1219 debug_info, dependencies, code_buffer, frame_size, oop_maps,
1220 handler_table, nul_chk_table, compiler, comp_level, aot_code_entry
1221 #if INCLUDE_JVMCI
1222 , speculations,
1223 speculations_len,
1224 jvmci_data
1225 #endif
1226 );
1227
1228 if (nm != nullptr) {
1229 nm->record_nmethod_dependency();
1230 NOT_PRODUCT(note_java_nmethod(nm));
1231 }
1232 }
1233 // Do verification and logging outside CodeCache_lock.
1234 if (nm != nullptr) {
1235
1236 #ifdef ASSERT
1237 LogTarget(Debug, aot, codecache, nmethod) log;
1238 if (log.is_enabled()) {
1239 LogStream out(log);
1240 out.print_cr("== new_nmethod 2");
1241 FlagSetting fs(PrintRelocations, true);
1242 nm->print_on_impl(&out);
1243 nm->decode(&out);
1244 }
1245 #endif
1246
1247 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet.
1248 DEBUG_ONLY(nm->verify();)
1249 nm->log_new_nmethod();
1250 }
1251 return nm;
1252 }
1253
1254 nmethod* nmethod::restore(address code_cache_buffer,
1255 const methodHandle& method,
1256 int compile_id,
1257 address reloc_data,
1258 GrowableArray<Handle>& oop_list,
1259 GrowableArray<Metadata*>& metadata_list,
1260 ImmutableOopMapSet* oop_maps,
1261 address immutable_data,
1262 GrowableArray<Handle>& reloc_imm_oop_list,
1263 GrowableArray<Metadata*>& reloc_imm_metadata_list,
1264 AOTCodeReader* aot_code_reader)
1265 {
1266 CodeBlob::restore(code_cache_buffer, "nmethod", reloc_data, oop_maps);
1267 nmethod* nm = (nmethod*)code_cache_buffer;
1268 nm->set_method(method());
1269 nm->_compile_id = compile_id;
1270 nm->set_immutable_data(immutable_data);
1271 nm->copy_values(&oop_list);
1272 nm->copy_values(&metadata_list);
1273
1274 aot_code_reader->fix_relocations(nm, &reloc_imm_oop_list, &reloc_imm_metadata_list);
1275
1276 #ifndef PRODUCT
1277 nm->asm_remarks().init();
1278 aot_code_reader->read_asm_remarks(nm->asm_remarks(), /* use_string_table */ false);
1279 nm->dbg_strings().init();
1280 aot_code_reader->read_dbg_strings(nm->dbg_strings(), /* use_string_table */ false);
1281 #endif
1282
1283 // Flush the code block
1284 ICache::invalidate_range(nm->code_begin(), nm->code_size());
1285
1286 // Create cache after PcDesc data is copied - it will be used to initialize cache
1287 nm->_pc_desc_container = new PcDescContainer(nm->scopes_pcs_begin());
1288
1289 nm->set_aot_code_entry(aot_code_reader->aot_code_entry());
1290
1291 nm->post_init();
1292 return nm;
1293 }
1294
1295 nmethod* nmethod::new_nmethod(nmethod* archived_nm,
1296 const methodHandle& method,
1297 AbstractCompiler* compiler,
1298 int compile_id,
1299 address reloc_data,
1300 GrowableArray<Handle>& oop_list,
1301 GrowableArray<Metadata*>& metadata_list,
1302 ImmutableOopMapSet* oop_maps,
1303 address immutable_data,
1304 GrowableArray<Handle>& reloc_imm_oop_list,
1305 GrowableArray<Metadata*>& reloc_imm_metadata_list,
1306 AOTCodeReader* aot_code_reader)
1307 {
1308 nmethod* nm = nullptr;
1309 int nmethod_size = archived_nm->size();
1310 // create nmethod
1311 {
1312 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1313 address code_cache_buffer = (address)CodeCache::allocate(nmethod_size, CodeCache::get_code_blob_type(archived_nm->comp_level()));
1314 if (code_cache_buffer != nullptr) {
1315 nm = archived_nm->restore(code_cache_buffer,
1316 method,
1317 compile_id,
1318 reloc_data,
1319 oop_list,
1320 metadata_list,
1321 oop_maps,
1322 immutable_data,
1323 reloc_imm_oop_list,
1324 reloc_imm_metadata_list,
1325 aot_code_reader);
1326 nm->record_nmethod_dependency();
1327 NOT_PRODUCT(note_java_nmethod(nm));
1328 }
1329 }
1330 // Do verification and logging outside CodeCache_lock.
1331 if (nm != nullptr) {
1332 #ifdef ASSERT
1333 LogTarget(Debug, aot, codecache, nmethod) log;
1334 if (log.is_enabled()) {
1335 LogStream out(log);
1336 out.print_cr("== new_nmethod 2");
1337 FlagSetting fs(PrintRelocations, true);
1338 nm->print_on_impl(&out);
1339 nm->decode(&out);
1340 }
1341 #endif
1342 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet.
1343 DEBUG_ONLY(nm->verify();)
1344 nm->log_new_nmethod();
1345 }
1346 return nm;
1347 }
1348
1349 // Fill in default values for various fields
1350 void nmethod::init_defaults(CodeBuffer *code_buffer, CodeOffsets* offsets) {
1351 // avoid uninitialized fields, even for short time periods
1352 _exception_cache = nullptr;
1353 _gc_data = nullptr;
1354 _oops_do_mark_link = nullptr;
1355 _compiled_ic_data = nullptr;
1356
1357 _is_unloading_state = 0;
1358 _state = not_installed;
1359
1360 _has_unsafe_access = 0;
1361 _has_method_handle_invokes = 0;
1362 _has_wide_vectors = 0;
1363 _has_monitors = 0;
1364 _has_scoped_access = 0;
1365 _has_flushed_dependencies = 0;
1366 _is_unlinked = 0;
1367 _load_reported = 0; // jvmti state
1368 _preloaded = 0;
1369 _has_clinit_barriers = 0;
1370
1371 _used = false;
1372 _deoptimization_status = not_marked;
1373
1374 // SECT_CONSTS is first in code buffer so the offset should be 0.
1375 int consts_offset = code_buffer->total_offset_of(code_buffer->consts());
1376 assert(consts_offset == 0, "const_offset: %d", consts_offset);
1377
1378 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs());
1379
1380 CHECKED_CAST(_entry_offset, uint16_t, (offsets->value(CodeOffsets::Entry)));
1381 CHECKED_CAST(_verified_entry_offset, uint16_t, (offsets->value(CodeOffsets::Verified_Entry)));
1382
1383 _skipped_instructions_size = code_buffer->total_skipped_instructions_size();
1384 }
1385
1386 // Post initialization
1387 void nmethod::post_init() {
1388 clear_unloading_state();
1389
1390 finalize_relocations();
1391
1424
1425 _osr_entry_point = nullptr;
1426 _pc_desc_container = nullptr;
1427 _entry_bci = InvocationEntryBci;
1428 _compile_id = compile_id;
1429 _comp_level = CompLevel_none;
1430 _compiler_type = type;
1431 _orig_pc_offset = 0;
1432 _num_stack_arg_slots = 0;
1433
1434 if (offsets->value(CodeOffsets::Exceptions) != -1) {
1435 // Continuation enter intrinsic
1436 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions);
1437 } else {
1438 _exception_offset = 0;
1439 }
1440 // Native wrappers do not have deopt handlers. Make the values
1441 // something that will never match a pc like the nmethod vtable entry
1442 _deopt_handler_offset = 0;
1443 _deopt_mh_handler_offset = 0;
1444 _aot_code_entry = nullptr;
1445 _method_profiling_count = 0;
1446 _unwind_handler_offset = 0;
1447
1448 CHECKED_CAST(_oops_size, uint16_t, align_up(code_buffer->total_oop_size(), oopSize));
1449 uint16_t metadata_size;
1450 CHECKED_CAST(metadata_size, uint16_t, align_up(code_buffer->total_metadata_size(), wordSize));
1451 JVMCI_ONLY( _metadata_size = metadata_size; )
1452 assert(_mutable_data_size == _relocation_size + metadata_size,
1453 "wrong mutable data size: %d != %d + %d",
1454 _mutable_data_size, _relocation_size, metadata_size);
1455
1456 // native wrapper does not have read-only data but we need unique not null address
1457 _immutable_data = blob_end();
1458 _immutable_data_size = 0;
1459 _nul_chk_table_offset = 0;
1460 _handler_table_offset = 0;
1461 _scopes_pcs_offset = 0;
1462 _scopes_data_offset = 0;
1463 #if INCLUDE_JVMCI
1464 _speculations_offset = 0;
1465 #endif
1485 // This is both handled in decode2(), called via print_code() -> decode()
1486 if (PrintNativeNMethods) {
1487 tty->print_cr("-------------------------- Assembly (native nmethod) ---------------------------");
1488 print_code();
1489 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1490 #if defined(SUPPORT_DATA_STRUCTS)
1491 if (AbstractDisassembler::show_structs()) {
1492 if (oop_maps != nullptr) {
1493 tty->print("oop maps:"); // oop_maps->print_on(tty) outputs a cr() at the beginning
1494 oop_maps->print_on(tty);
1495 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1496 }
1497 }
1498 #endif
1499 } else {
1500 print(); // print the header part only.
1501 }
1502 #if defined(SUPPORT_DATA_STRUCTS)
1503 if (AbstractDisassembler::show_structs()) {
1504 if (PrintRelocations) {
1505 print_relocations_on(tty);
1506 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1507 }
1508 }
1509 #endif
1510 if (xtty != nullptr) {
1511 xtty->tail("print_native_nmethod");
1512 }
1513 }
1514 }
1515
1516 void* nmethod::operator new(size_t size, int nmethod_size, int comp_level) throw () {
1517 return CodeCache::allocate(nmethod_size, CodeCache::get_code_blob_type(comp_level));
1518 }
1519
1520 void* nmethod::operator new(size_t size, int nmethod_size, bool allow_NonNMethod_space) throw () {
1521 // Try MethodNonProfiled and MethodProfiled.
1522 void* return_value = CodeCache::allocate(nmethod_size, CodeBlobType::MethodNonProfiled);
1523 if (return_value != nullptr || !allow_NonNMethod_space) return return_value;
1524 // Try NonNMethod or give up.
1525 return CodeCache::allocate(nmethod_size, CodeBlobType::NonNMethod);
1529 nmethod::nmethod(
1530 Method* method,
1531 CompilerType type,
1532 int nmethod_size,
1533 int immutable_data_size,
1534 int mutable_data_size,
1535 int compile_id,
1536 int entry_bci,
1537 address immutable_data,
1538 CodeOffsets* offsets,
1539 int orig_pc_offset,
1540 DebugInformationRecorder* debug_info,
1541 Dependencies* dependencies,
1542 CodeBuffer *code_buffer,
1543 int frame_size,
1544 OopMapSet* oop_maps,
1545 ExceptionHandlerTable* handler_table,
1546 ImplicitExceptionTable* nul_chk_table,
1547 AbstractCompiler* compiler,
1548 CompLevel comp_level
1549 , AOTCodeEntry* aot_code_entry
1550 #if INCLUDE_JVMCI
1551 , char* speculations,
1552 int speculations_len,
1553 JVMCINMethodData* jvmci_data
1554 #endif
1555 )
1556 : CodeBlob("nmethod", CodeBlobKind::Nmethod, code_buffer, nmethod_size, sizeof(nmethod),
1557 offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps, false, mutable_data_size),
1558 _deoptimization_generation(0),
1559 _gc_epoch(CodeCache::gc_epoch()),
1560 _method(method),
1561 _osr_link(nullptr)
1562 {
1563 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
1564 {
1565 DEBUG_ONLY(NoSafepointVerifier nsv;)
1566 assert_locked_or_safepoint(CodeCache_lock);
1567
1568 init_defaults(code_buffer, offsets);
1569 _aot_code_entry = aot_code_entry;
1570 _method_profiling_count = 0;
1571
1572 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry);
1573 _entry_bci = entry_bci;
1574 _compile_id = compile_id;
1575 _comp_level = comp_level;
1576 _compiler_type = type;
1577 _orig_pc_offset = orig_pc_offset;
1578
1579 _num_stack_arg_slots = entry_bci != InvocationEntryBci ? 0 : _method->constMethod()->num_stack_arg_slots();
1580
1581 set_ctable_begin(header_begin() + content_offset());
1582
1583 #if INCLUDE_JVMCI
1584 if (compiler->is_jvmci()) {
1585 // JVMCI might not produce any stub sections
1586 if (offsets->value(CodeOffsets::Exceptions) != -1) {
1587 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions);
1588 } else {
1589 _exception_offset = -1;
1590 }
1681 #if INCLUDE_JVMCI
1682 // Copy speculations to nmethod
1683 if (speculations_size() != 0) {
1684 memcpy(speculations_begin(), speculations, speculations_len);
1685 }
1686 #endif
1687
1688 post_init();
1689
1690 // we use the information of entry points to find out if a method is
1691 // static or non static
1692 assert(compiler->is_c2() || compiler->is_jvmci() ||
1693 _method->is_static() == (entry_point() == verified_entry_point()),
1694 " entry points must be same for static methods and vice versa");
1695 }
1696 }
1697
1698 // Print a short set of xml attributes to identify this nmethod. The
1699 // output should be embedded in some other element.
1700 void nmethod::log_identity(xmlStream* log) const {
1701 assert(log->inside_attrs_or_error(), "printing attributes");
1702 log->print(" code_compile_id='%d'", compile_id());
1703 const char* nm_kind = compile_kind();
1704 if (nm_kind != nullptr) log->print(" code_compile_kind='%s'", nm_kind);
1705 log->print(" code_compiler='%s'", compiler_name());
1706 if (TieredCompilation) {
1707 log->print(" code_compile_level='%d'", comp_level());
1708 }
1709 #if INCLUDE_JVMCI
1710 if (jvmci_nmethod_data() != nullptr) {
1711 const char* jvmci_name = jvmci_nmethod_data()->name();
1712 if (jvmci_name != nullptr) {
1713 log->print(" jvmci_mirror_name='");
1714 log->text("%s", jvmci_name);
1715 log->print("'");
1716 }
1717 }
1718 #endif
1719 }
1720
1721
1722 #define LOG_OFFSET(log, name) \
1723 if (p2i(name##_end()) - p2i(name##_begin())) \
1724 log->print(" " XSTR(name) "_offset='%zd'" , \
1725 p2i(name##_begin()) - p2i(this))
1726
1727
1812 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1813 if (oop_maps() != nullptr) {
1814 tty->print("oop maps:"); // oop_maps()->print_on(tty) outputs a cr() at the beginning
1815 oop_maps()->print_on(tty);
1816 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1817 }
1818 }
1819 #endif
1820 } else {
1821 print(); // print the header part only.
1822 }
1823
1824 #if defined(SUPPORT_DATA_STRUCTS)
1825 if (AbstractDisassembler::show_structs()) {
1826 methodHandle mh(Thread::current(), _method);
1827 if (printmethod || PrintDebugInfo || CompilerOracle::has_option(mh, CompileCommandEnum::PrintDebugInfo)) {
1828 print_scopes();
1829 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1830 }
1831 if (printmethod || PrintRelocations || CompilerOracle::has_option(mh, CompileCommandEnum::PrintRelocations)) {
1832 print_relocations_on(tty);
1833 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1834 }
1835 if (printmethod || PrintDependencies || CompilerOracle::has_option(mh, CompileCommandEnum::PrintDependencies)) {
1836 print_dependencies_on(tty);
1837 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1838 }
1839 if (printmethod || PrintExceptionHandlers) {
1840 print_handler_table();
1841 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1842 print_nul_chk_table();
1843 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1844 }
1845
1846 if (printmethod) {
1847 print_recorded_oops();
1848 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1849 print_recorded_metadata();
1850 tty->print_cr("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ");
1851 }
1852 }
1853 #endif
1854
1855 if (xtty != nullptr) {
1856 xtty->tail("print_nmethod");
1857 }
1858 }
1859
1860
1861 // Promote one word from an assembly-time handle to a live embedded oop.
1862 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) {
1863 if (handle == nullptr ||
1864 // As a special case, IC oops are initialized to 1 or -1.
1865 handle == (jobject) Universe::non_oop_word()) {
1866 *(void**)dest = handle;
1867 } else {
1868 *dest = JNIHandles::resolve_non_null(handle);
1869 }
1870 }
1871
1872 void nmethod::copy_values(GrowableArray<Handle>* array) {
1873 int length = array->length();
1874 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough");
1875 oop* dest = oops_begin();
1876 for (int index = 0 ; index < length; index++) {
1877 dest[index] = array->at(index)();
1878 }
1879 }
1880
1881 // Have to have the same name because it's called by a template
1882 void nmethod::copy_values(GrowableArray<jobject>* array) {
1883 int length = array->length();
1884 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough");
1885 oop* dest = oops_begin();
1886 for (int index = 0 ; index < length; index++) {
1887 initialize_immediate_oop(&dest[index], array->at(index));
1888 }
1889
1890 // Now we can fix up all the oops in the code. We need to do this
1891 // in the code because the assembler uses jobjects as placeholders.
1892 // The code and relocations have already been initialized by the
1893 // CodeBlob constructor, so it is valid even at this early point to
1894 // iterate over relocations and patch the code.
1895 fix_oop_relocations(nullptr, nullptr, /*initialize_immediates=*/ true);
1896 }
1897
1898 void nmethod::copy_values(GrowableArray<Metadata*>* array) {
1899 int length = array->length();
1907 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) {
1908 // re-patch all oop-bearing instructions, just in case some oops moved
1909 RelocIterator iter(this, begin, end);
1910 while (iter.next()) {
1911 if (iter.type() == relocInfo::oop_type) {
1912 oop_Relocation* reloc = iter.oop_reloc();
1913 if (initialize_immediates && reloc->oop_is_immediate()) {
1914 oop* dest = reloc->oop_addr();
1915 jobject obj = *reinterpret_cast<jobject*>(dest);
1916 initialize_immediate_oop(dest, obj);
1917 }
1918 // Refresh the oop-related bits of this instruction.
1919 reloc->fix_oop_relocation();
1920 } else if (iter.type() == relocInfo::metadata_type) {
1921 metadata_Relocation* reloc = iter.metadata_reloc();
1922 reloc->fix_metadata_relocation();
1923 }
1924 }
1925 }
1926
1927 void nmethod::create_reloc_immediates_list(JavaThread* thread, GrowableArray<Handle>& oop_list, GrowableArray<Metadata*>& metadata_list) {
1928 RelocIterator iter(this);
1929 while (iter.next()) {
1930 if (iter.type() == relocInfo::oop_type) {
1931 oop_Relocation* reloc = iter.oop_reloc();
1932 if (reloc->oop_is_immediate()) {
1933 oop dest = reloc->oop_value();
1934 Handle h(thread, dest);
1935 oop_list.append(h);
1936 }
1937 } else if (iter.type() == relocInfo::metadata_type) {
1938 metadata_Relocation* reloc = iter.metadata_reloc();
1939 if (reloc->metadata_is_immediate()) {
1940 Metadata* m = reloc->metadata_value();
1941 metadata_list.append(m);
1942 }
1943 }
1944 }
1945 }
1946
1947 static void install_post_call_nop_displacement(nmethod* nm, address pc) {
1948 NativePostCallNop* nop = nativePostCallNop_at((address) pc);
1949 intptr_t cbaddr = (intptr_t) nm;
1950 intptr_t offset = ((intptr_t) pc) - cbaddr;
1951
1952 int oopmap_slot = nm->oop_maps()->find_slot_for_offset(int((intptr_t) pc - (intptr_t) nm->code_begin()));
1953 if (oopmap_slot < 0) { // this can happen at asynchronous (non-safepoint) stackwalks
1954 log_debug(codecache)("failed to find oopmap for cb: " INTPTR_FORMAT " offset: %d", cbaddr, (int) offset);
1955 } else if (!nop->patch(oopmap_slot, offset)) {
1956 log_debug(codecache)("failed to encode %d %d", oopmap_slot, (int) offset);
1957 }
1958 }
1959
1960 void nmethod::finalize_relocations() {
1961 NoSafepointVerifier nsv;
1962
1963 GrowableArray<NativeMovConstReg*> virtual_call_data;
1964
1965 // Make sure that post call nops fill in nmethod offsets eagerly so
1966 // we don't have to race with deoptimization
2088 Atomic::store(&_gc_epoch, CodeCache::gc_epoch());
2089 }
2090
2091 bool nmethod::is_maybe_on_stack() {
2092 // If the condition below is true, it means that the nmethod was found to
2093 // be alive the previous completed marking cycle.
2094 return Atomic::load(&_gc_epoch) >= CodeCache::previous_completed_gc_marking_cycle();
2095 }
2096
2097 void nmethod::inc_decompile_count() {
2098 if (!is_compiled_by_c2() && !is_compiled_by_jvmci()) return;
2099 // Could be gated by ProfileTraps, but do not bother...
2100 Method* m = method();
2101 if (m == nullptr) return;
2102 MethodData* mdo = m->method_data();
2103 if (mdo == nullptr) return;
2104 // There is a benign race here. See comments in methodData.hpp.
2105 mdo->inc_decompile_count();
2106 }
2107
2108 void nmethod::inc_method_profiling_count() {
2109 Atomic::inc(&_method_profiling_count);
2110 }
2111
2112 uint64_t nmethod::method_profiling_count() {
2113 return _method_profiling_count;
2114 }
2115
2116 bool nmethod::try_transition(signed char new_state_int) {
2117 signed char new_state = new_state_int;
2118 assert_lock_strong(NMethodState_lock);
2119 signed char old_state = _state;
2120 if (old_state >= new_state) {
2121 // Ensure monotonicity of transitions.
2122 return false;
2123 }
2124 Atomic::store(&_state, new_state);
2125 return true;
2126 }
2127
2128 void nmethod::invalidate_osr_method() {
2129 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod");
2130 // Remove from list of active nmethods
2131 if (method() != nullptr) {
2132 method()->method_holder()->remove_osr_nmethod(this);
2133 }
2134 }
2135
2147 }
2148 }
2149
2150 ResourceMark rm;
2151 stringStream ss(NEW_RESOURCE_ARRAY(char, 256), 256);
2152 ss.print("made not entrant: %s", reason);
2153
2154 CompileTask::print_ul(this, ss.freeze());
2155 if (PrintCompilation) {
2156 print_on_with_msg(tty, ss.freeze());
2157 }
2158 }
2159
2160 void nmethod::unlink_from_method() {
2161 if (method() != nullptr) {
2162 method()->unlink_code(this);
2163 }
2164 }
2165
2166 // Invalidate code
2167 bool nmethod::make_not_entrant(const char* reason, bool keep_aot_entry) {
2168 assert(reason != nullptr, "Must provide a reason");
2169
2170 // This can be called while the system is already at a safepoint which is ok
2171 NoSafepointVerifier nsv;
2172
2173 if (is_unloading()) {
2174 // If the nmethod is unloading, then it is already not entrant through
2175 // the nmethod entry barriers. No need to do anything; GC will unload it.
2176 return false;
2177 }
2178
2179 if (Atomic::load(&_state) == not_entrant) {
2180 // Avoid taking the lock if already in required state.
2181 // This is safe from races because the state is an end-state,
2182 // which the nmethod cannot back out of once entered.
2183 // No need for fencing either.
2184 return false;
2185 }
2186
2187 {
2223 }
2224
2225 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
2226 if (bs_nm == nullptr || !bs_nm->supports_entry_barrier(this)) {
2227 // If nmethod entry barriers are not supported, we won't mark
2228 // nmethods as on-stack when they become on-stack. So we
2229 // degrade to a less accurate flushing strategy, for now.
2230 mark_as_maybe_on_stack();
2231 }
2232
2233 // Change state
2234 bool success = try_transition(not_entrant);
2235 assert(success, "Transition can't fail");
2236
2237 // Log the transition once
2238 log_state_change(reason);
2239
2240 // Remove nmethod from method.
2241 unlink_from_method();
2242
2243 if (!keep_aot_entry) {
2244 // Keep AOT cached code if it was simply replaced
2245 // otherwise make it not entrant too.
2246 AOTCodeCache::invalidate(_aot_code_entry);
2247 }
2248
2249 CompileBroker::log_not_entrant(this);
2250 } // leave critical region under NMethodState_lock
2251
2252 #if INCLUDE_JVMCI
2253 // Invalidate can't occur while holding the NMethodState_lock
2254 JVMCINMethodData* nmethod_data = jvmci_nmethod_data();
2255 if (nmethod_data != nullptr) {
2256 nmethod_data->invalidate_nmethod_mirror(this);
2257 }
2258 #endif
2259
2260 #ifdef ASSERT
2261 if (is_osr_method() && method() != nullptr) {
2262 // Make sure osr nmethod is invalidated, i.e. not on the list
2263 bool found = method()->method_holder()->remove_osr_nmethod(this);
2264 assert(!found, "osr nmethod should have been invalidated");
2265 }
2266 #endif
2267
2268 return true;
2269 }
2310
2311 // completely deallocate this method
2312 Events::log_nmethod_flush(Thread::current(), "flushing %s nmethod " INTPTR_FORMAT, is_osr_method() ? "osr" : "", p2i(this));
2313 log_debug(codecache)("*flushing %s nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT
2314 "/Free CodeCache:%zuKb",
2315 is_osr_method() ? "osr" : "",_compile_id, p2i(this), CodeCache::blob_count(),
2316 CodeCache::unallocated_capacity(CodeCache::get_code_blob_type(this))/1024);
2317
2318 // We need to deallocate any ExceptionCache data.
2319 // Note that we do not need to grab the nmethod lock for this, it
2320 // better be thread safe if we're disposing of it!
2321 ExceptionCache* ec = exception_cache();
2322 while(ec != nullptr) {
2323 ExceptionCache* next = ec->next();
2324 delete ec;
2325 ec = next;
2326 }
2327 if (_pc_desc_container != nullptr) {
2328 delete _pc_desc_container;
2329 }
2330 if (_compiled_ic_data != nullptr) {
2331 delete[] _compiled_ic_data;
2332 }
2333
2334 if (_immutable_data != data_end() && !AOTCodeCache::is_address_in_aot_cache((address)_oop_maps)) {
2335 os::free(_immutable_data);
2336 _immutable_data = blob_end(); // Valid not null address
2337 }
2338 if (unregister_nmethod) {
2339 Universe::heap()->unregister_nmethod(this);
2340 }
2341 CodeCache::unregister_old_nmethod(this);
2342
2343 CodeBlob::purge();
2344 }
2345
2346 oop nmethod::oop_at(int index) const {
2347 if (index == 0) {
2348 return nullptr;
2349 }
2350
2351 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
2352 return bs_nm->oop_load_no_keepalive(this, index);
2353 }
2354
2375 MethodHandles::clean_dependency_context(call_site);
2376 } else {
2377 InstanceKlass* ik = deps.context_type();
2378 if (ik == nullptr) {
2379 continue; // ignore things like evol_method
2380 }
2381 // During GC liveness of dependee determines class that needs to be updated.
2382 // The GC may clean dependency contexts concurrently and in parallel.
2383 ik->clean_dependency_context();
2384 }
2385 }
2386 }
2387 }
2388
2389 void nmethod::post_compiled_method(CompileTask* task) {
2390 task->mark_success();
2391 task->set_nm_content_size(content_size());
2392 task->set_nm_insts_size(insts_size());
2393 task->set_nm_total_size(total_size());
2394
2395 // task->is_aot() is true only for loaded cached code.
2396 // nmethod::_aot_code_entry is set for loaded and stored cached code
2397 // to invalidate the entry when nmethod is deoptimized.
2398 // There is option to not store in archive cached code.
2399 guarantee((_aot_code_entry != nullptr) || !task->is_aot() || VerifyCachedCode, "sanity");
2400
2401 // JVMTI -- compiled method notification (must be done outside lock)
2402 post_compiled_method_load_event();
2403
2404 if (CompilationLog::log() != nullptr) {
2405 CompilationLog::log()->log_nmethod(JavaThread::current(), this);
2406 }
2407
2408 const DirectiveSet* directive = task->directive();
2409 maybe_print_nmethod(directive);
2410 }
2411
2412 // ------------------------------------------------------------------
2413 // post_compiled_method_load_event
2414 // new method for install_code() path
2415 // Transfer information from compilation to jvmti
2416 void nmethod::post_compiled_method_load_event(JvmtiThreadState* state) {
2417 // This is a bad time for a safepoint. We don't want
2418 // this nmethod to get unloaded while we're queueing the event.
2419 NoSafepointVerifier nsv;
2420
3112
3113 // Make sure all the entry points are correctly aligned for patching.
3114 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point());
3115
3116 // assert(oopDesc::is_oop(method()), "must be valid");
3117
3118 ResourceMark rm;
3119
3120 if (!CodeCache::contains(this)) {
3121 fatal("nmethod at " INTPTR_FORMAT " not in zone", p2i(this));
3122 }
3123
3124 if(is_native_method() )
3125 return;
3126
3127 nmethod* nm = CodeCache::find_nmethod(verified_entry_point());
3128 if (nm != this) {
3129 fatal("find_nmethod did not find this nmethod (" INTPTR_FORMAT ")", p2i(this));
3130 }
3131
3132 // Verification can triggered during shutdown after AOTCodeCache is closed.
3133 // If the Scopes data is in the AOT code cache, then we should avoid verification during shutdown.
3134 if (!is_aot() || AOTCodeCache::is_on()) {
3135 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
3136 if (! p->verify(this)) {
3137 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", p2i(this));
3138 }
3139 }
3140
3141 #ifdef ASSERT
3142 #if INCLUDE_JVMCI
3143 {
3144 // Verify that implicit exceptions that deoptimize have a PcDesc and OopMap
3145 ImmutableOopMapSet* oms = oop_maps();
3146 ImplicitExceptionTable implicit_table(this);
3147 for (uint i = 0; i < implicit_table.len(); i++) {
3148 int exec_offset = (int) implicit_table.get_exec_offset(i);
3149 if (implicit_table.get_exec_offset(i) == implicit_table.get_cont_offset(i)) {
3150 assert(pc_desc_at(code_begin() + exec_offset) != nullptr, "missing PcDesc");
3151 bool found = false;
3152 for (int i = 0, imax = oms->count(); i < imax; i++) {
3153 if (oms->pair_at(i)->pc_offset() == exec_offset) {
3154 found = true;
3155 break;
3156 }
3157 }
3158 assert(found, "missing oopmap");
3159 }
3160 }
3161 }
3162 #endif
3163 #endif
3164 }
3165
3166 VerifyOopsClosure voc(this);
3167 oops_do(&voc);
3168 assert(voc.ok(), "embedded oops must be OK");
3169 Universe::heap()->verify_nmethod(this);
3170
3171 assert(_oops_do_mark_link == nullptr, "_oops_do_mark_link for %s should be nullptr but is " PTR_FORMAT,
3172 nm->method()->external_name(), p2i(_oops_do_mark_link));
3173 if (!is_aot() || AOTCodeCache::is_on()) {
3174 verify_scopes();
3175 }
3176
3177 CompiledICLocker nm_verify(this);
3178 VerifyMetadataClosure vmc;
3179 metadata_do(&vmc);
3180 }
3181
3182
3183 void nmethod::verify_interrupt_point(address call_site, bool is_inline_cache) {
3184
3185 // Verify IC only when nmethod installation is finished.
3186 if (!is_not_installed()) {
3187 if (CompiledICLocker::is_safe(this)) {
3188 if (is_inline_cache) {
3189 CompiledIC_at(this, call_site);
3190 } else {
3191 CompiledDirectCall::at(call_site);
3192 }
3193 } else {
3194 CompiledICLocker ml_verify(this);
3195 if (is_inline_cache) {
3324 p2i(nul_chk_table_end()),
3325 nul_chk_table_size());
3326 if (handler_table_size() > 0) st->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3327 p2i(handler_table_begin()),
3328 p2i(handler_table_end()),
3329 handler_table_size());
3330 if (scopes_pcs_size () > 0) st->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3331 p2i(scopes_pcs_begin()),
3332 p2i(scopes_pcs_end()),
3333 scopes_pcs_size());
3334 if (scopes_data_size () > 0) st->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3335 p2i(scopes_data_begin()),
3336 p2i(scopes_data_end()),
3337 scopes_data_size());
3338 #if INCLUDE_JVMCI
3339 if (speculations_size () > 0) st->print_cr(" speculations [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
3340 p2i(speculations_begin()),
3341 p2i(speculations_end()),
3342 speculations_size());
3343 #endif
3344 if (AOTCodeCache::is_on() && _aot_code_entry != nullptr) {
3345 _aot_code_entry->print(st);
3346 }
3347 }
3348
3349 void nmethod::print_code() {
3350 ResourceMark m;
3351 ttyLocker ttyl;
3352 // Call the specialized decode method of this class.
3353 decode(tty);
3354 }
3355
3356 #ifndef PRODUCT // called InstanceKlass methods are available only then. Declared as PRODUCT_RETURN
3357
3358 void nmethod::print_dependencies_on(outputStream* out) {
3359 ResourceMark rm;
3360 stringStream st;
3361 st.print_cr("Dependencies:");
3362 for (Dependencies::DepStream deps(this); deps.next(); ) {
3363 deps.print_dependency(&st);
3364 InstanceKlass* ctxk = deps.context_type();
3365 if (ctxk != nullptr) {
3366 if (ctxk->is_dependent_nmethod(this)) {
3426 st->print("scopes:");
3427 if (scopes_pcs_begin() < scopes_pcs_end()) {
3428 st->cr();
3429 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
3430 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null)
3431 continue;
3432
3433 ScopeDesc* sd = scope_desc_at(p->real_pc(this));
3434 while (sd != nullptr) {
3435 sd->print_on(st, p); // print output ends with a newline
3436 sd = sd->sender();
3437 }
3438 }
3439 } else {
3440 st->print_cr(" <list empty>");
3441 }
3442 }
3443 #endif
3444
3445 #ifndef PRODUCT // RelocIterator does support printing only then.
3446 void nmethod::print_relocations_on(outputStream* st) {
3447 ResourceMark m; // in case methods get printed via the debugger
3448 st->print_cr("relocations:");
3449 RelocIterator iter(this);
3450 iter.print_on(st);
3451 }
3452 #endif
3453
3454 void nmethod::print_pcs_on(outputStream* st) {
3455 ResourceMark m; // in case methods get printed via debugger
3456 st->print("pc-bytecode offsets:");
3457 if (scopes_pcs_begin() < scopes_pcs_end()) {
3458 st->cr();
3459 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
3460 p->print_on(st, this); // print output ends with a newline
3461 }
3462 } else {
3463 st->print_cr(" <list empty>");
3464 }
3465 }
3466
3467 void nmethod::print_handler_table() {
3468 ExceptionHandlerTable(this).print(code_begin());
3469 }
3470
4236
4237 #endif // !PRODUCT
4238
4239 #if INCLUDE_JVMCI
4240 void nmethod::update_speculation(JavaThread* thread) {
4241 jlong speculation = thread->pending_failed_speculation();
4242 if (speculation != 0) {
4243 guarantee(jvmci_nmethod_data() != nullptr, "failed speculation in nmethod without failed speculation list");
4244 jvmci_nmethod_data()->add_failed_speculation(this, speculation);
4245 thread->set_pending_failed_speculation(0);
4246 }
4247 }
4248
4249 const char* nmethod::jvmci_name() {
4250 if (jvmci_nmethod_data() != nullptr) {
4251 return jvmci_nmethod_data()->name();
4252 }
4253 return nullptr;
4254 }
4255 #endif
4256
4257 void nmethod::prepare_for_archiving_impl() {
4258 CodeBlob::prepare_for_archiving_impl();
4259 _deoptimization_generation = 0;
4260 _gc_epoch = 0;
4261 _method_profiling_count = 0;
4262 _osr_link = nullptr;
4263 _method = nullptr;
4264 _immutable_data = nullptr;
4265 _pc_desc_container = nullptr;
4266 _exception_cache = nullptr;
4267 _gc_data = nullptr;
4268 _oops_do_mark_link = nullptr;
4269 _compiled_ic_data = nullptr;
4270 _osr_entry_point = nullptr;
4271 _compile_id = -1;
4272 _deoptimization_status = not_marked;
4273 _is_unloading_state = 0;
4274 _state = not_installed;
4275 }
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