30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/aotCodeCache.hpp"
35 #include "code/codeCache.hpp"
36 #include "code/compiledIC.hpp"
37 #include "code/nmethod.inline.hpp"
38 #include "code/scopeDesc.hpp"
39 #include "code/vtableStubs.hpp"
40 #include "compiler/abstractCompiler.hpp"
41 #include "compiler/compileBroker.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/collectedHeap.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/interpreterRuntime.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/resourceArea.hpp"
51 #include "memory/universe.hpp"
52 #include "metaprogramming/primitiveConversions.hpp"
53 #include "oops/klass.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/forte.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/arguments.hpp"
63 #include "runtime/atomicAccess.hpp"
64 #include "runtime/basicLock.inline.hpp"
65 #include "runtime/frame.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/init.hpp"
68 #include "runtime/interfaceSupport.inline.hpp"
69 #include "runtime/java.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/jniHandles.inline.hpp"
72 #include "runtime/osThread.hpp"
73 #include "runtime/perfData.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.hpp"
78 #include "runtime/timerTrace.hpp"
79 #include "runtime/vframe.inline.hpp"
80 #include "runtime/vframeArray.hpp"
81 #include "runtime/vm_version.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/dtrace.hpp"
84 #include "utilities/events.hpp"
85 #include "utilities/exceptions.hpp"
86 #include "utilities/globalDefinitions.hpp"
87 #include "utilities/hashTable.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/xmlstream.hpp"
90 #ifdef COMPILER1
91 #include "c1/c1_Runtime1.hpp"
92 #endif
93 #ifdef COMPILER2
94 #include "opto/runtime.hpp"
1167 // for a call current in progress, i.e., arguments has been pushed on stack
1168 // but callee has not been invoked yet. Caller frame must be compiled.
1169 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1170 CallInfo& callinfo, TRAPS) {
1171 Handle receiver;
1172 Handle nullHandle; // create a handy null handle for exception returns
1173 JavaThread* current = THREAD;
1174
1175 assert(!vfst.at_end(), "Java frame must exist");
1176
1177 // Find caller and bci from vframe
1178 methodHandle caller(current, vfst.method());
1179 int bci = vfst.bci();
1180
1181 if (caller->is_continuation_enter_intrinsic()) {
1182 bc = Bytecodes::_invokestatic;
1183 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1184 return receiver;
1185 }
1186
1187 Bytecode_invoke bytecode(caller, bci);
1188 int bytecode_index = bytecode.index();
1189 bc = bytecode.invoke_code();
1190
1191 methodHandle attached_method(current, extract_attached_method(vfst));
1192 if (attached_method.not_null()) {
1193 Method* callee = bytecode.static_target(CHECK_NH);
1194 vmIntrinsics::ID id = callee->intrinsic_id();
1195 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1196 // it attaches statically resolved method to the call site.
1197 if (MethodHandles::is_signature_polymorphic(id) &&
1198 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1199 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1200
1201 // Adjust invocation mode according to the attached method.
1202 switch (bc) {
1203 case Bytecodes::_invokevirtual:
1204 if (attached_method->method_holder()->is_interface()) {
1205 bc = Bytecodes::_invokeinterface;
1206 }
1207 break;
1208 case Bytecodes::_invokeinterface:
1209 if (!attached_method->method_holder()->is_interface()) {
1210 bc = Bytecodes::_invokevirtual;
1211 }
1212 break;
1213 case Bytecodes::_invokehandle:
1214 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1215 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1216 : Bytecodes::_invokevirtual;
1217 }
1218 break;
1219 default:
1220 break;
1221 }
1222 }
1223 }
1224
1225 assert(bc != Bytecodes::_illegal, "not initialized");
1226
1227 bool has_receiver = bc != Bytecodes::_invokestatic &&
1228 bc != Bytecodes::_invokedynamic &&
1229 bc != Bytecodes::_invokehandle;
1230
1231 // Find receiver for non-static call
1232 if (has_receiver) {
1233 // This register map must be update since we need to find the receiver for
1234 // compiled frames. The receiver might be in a register.
1235 RegisterMap reg_map2(current,
1236 RegisterMap::UpdateMap::include,
1237 RegisterMap::ProcessFrames::include,
1238 RegisterMap::WalkContinuation::skip);
1239 frame stubFrame = current->last_frame();
1240 // Caller-frame is a compiled frame
1241 frame callerFrame = stubFrame.sender(®_map2);
1242
1243 if (attached_method.is_null()) {
1244 Method* callee = bytecode.static_target(CHECK_NH);
1245 if (callee == nullptr) {
1246 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1247 }
1248 }
1249
1250 // Retrieve from a compiled argument list
1251 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1252 assert(oopDesc::is_oop_or_null(receiver()), "");
1253
1254 if (receiver.is_null()) {
1255 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1256 }
1257 }
1258
1259 // Resolve method
1260 if (attached_method.not_null()) {
1261 // Parameterized by attached method.
1262 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, CHECK_NH);
1263 } else {
1264 // Parameterized by bytecode.
1265 constantPoolHandle constants(current, caller->constants());
1266 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1267 }
1268
1269 #ifdef ASSERT
1270 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1271 if (has_receiver) {
1272 assert(receiver.not_null(), "should have thrown exception");
1273 Klass* receiver_klass = receiver->klass();
1274 Klass* rk = nullptr;
1275 if (attached_method.not_null()) {
1276 // In case there's resolved method attached, use its holder during the check.
1277 rk = attached_method->method_holder();
1278 } else {
1279 // Klass is already loaded.
1280 constantPoolHandle constants(current, caller->constants());
1281 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1282 }
1283 Klass* static_receiver_klass = rk;
1284 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1285 "actual receiver must be subclass of static receiver klass");
1286 if (receiver_klass->is_instance_klass()) {
1287 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1288 tty->print_cr("ERROR: Klass not yet initialized!!");
1289 receiver_klass->print();
1290 }
1291 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1292 }
1293 }
1294 #endif
1295
1296 return receiver;
1297 }
1298
1299 methodHandle SharedRuntime::find_callee_method(TRAPS) {
1300 JavaThread* current = THREAD;
1301 ResourceMark rm(current);
1302 // We need first to check if any Java activations (compiled, interpreted)
1303 // exist on the stack since last JavaCall. If not, we need
1304 // to get the target method from the JavaCall wrapper.
1305 vframeStream vfst(current, true); // Do not skip any javaCalls
1306 methodHandle callee_method;
1307 if (vfst.at_end()) {
1308 // No Java frames were found on stack since we did the JavaCall.
1309 // Hence the stack can only contain an entry_frame. We need to
1310 // find the target method from the stub frame.
1311 RegisterMap reg_map(current,
1312 RegisterMap::UpdateMap::skip,
1313 RegisterMap::ProcessFrames::include,
1314 RegisterMap::WalkContinuation::skip);
1315 frame fr = current->last_frame();
1316 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1317 fr = fr.sender(®_map);
1318 assert(fr.is_entry_frame(), "must be");
1319 // fr is now pointing to the entry frame.
1320 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1321 } else {
1322 Bytecodes::Code bc;
1323 CallInfo callinfo;
1324 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1325 callee_method = methodHandle(current, callinfo.selected_method());
1326 }
1327 assert(callee_method()->is_method(), "must be");
1328 return callee_method;
1329 }
1330
1331 // Resolves a call.
1332 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, TRAPS) {
1333 JavaThread* current = THREAD;
1334 ResourceMark rm(current);
1335 RegisterMap cbl_map(current,
1336 RegisterMap::UpdateMap::skip,
1337 RegisterMap::ProcessFrames::include,
1338 RegisterMap::WalkContinuation::skip);
1339 frame caller_frame = current->last_frame().sender(&cbl_map);
1340
1341 CodeBlob* caller_cb = caller_frame.cb();
1342 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1343 nmethod* caller_nm = caller_cb->as_nmethod();
1344
1345 // determine call info & receiver
1346 // note: a) receiver is null for static calls
1347 // b) an exception is thrown if receiver is null for non-static calls
1348 CallInfo call_info;
1349 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1350 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1351
1352 NoSafepointVerifier nsv;
1353
1354 methodHandle callee_method(current, call_info.selected_method());
1355
1356 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1357 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1358 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1359 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1360 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1361
1362 assert(!caller_nm->is_unloading(), "It should not be unloading");
1363
1364 #ifndef PRODUCT
1365 // tracing/debugging/statistics
1366 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1367 (is_virtual) ? (&_resolve_virtual_ctr) :
1368 (&_resolve_static_ctr);
1369 AtomicAccess::inc(addr);
1370
1371 if (TraceCallFixup) {
1372 ResourceMark rm(current);
1373 tty->print("resolving %s%s (%s) call to",
1374 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1375 Bytecodes::name(invoke_code));
1376 callee_method->print_short_name(tty);
1377 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1378 p2i(caller_frame.pc()), p2i(callee_method->code()));
1379 }
1380 #endif
1381
1382 if (invoke_code == Bytecodes::_invokestatic) {
1383 assert(callee_method->method_holder()->is_initialized() ||
1384 callee_method->method_holder()->is_reentrant_initialization(current),
1385 "invalid class initialization state for invoke_static");
1386 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1387 // In order to keep class initialization check, do not patch call
1388 // site for static call when the class is not fully initialized.
1389 // Proper check is enforced by call site re-resolution on every invocation.
1390 //
1391 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1392 // explicit class initialization check is put in nmethod entry (VEP).
1393 assert(callee_method->method_holder()->is_linked(), "must be");
1394 return callee_method;
1395 }
1396 }
1397
1398
1399 // JSR 292 key invariant:
1400 // If the resolved method is a MethodHandle invoke target, the call
1401 // site must be a MethodHandle call site, because the lambda form might tail-call
1402 // leaving the stack in a state unknown to either caller or callee
1403
1404 // Compute entry points. The computation of the entry points is independent of
1405 // patching the call.
1406
1407 // Make sure the callee nmethod does not get deoptimized and removed before
1408 // we are done patching the code.
1409
1410
1411 CompiledICLocker ml(caller_nm);
1412 if (is_virtual && !is_optimized) {
1413 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1414 inline_cache->update(&call_info, receiver->klass());
1415 } else {
1416 // Callsite is a direct call - set it to the destination method
1417 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1418 callsite->set(callee_method);
1419 }
1420
1421 return callee_method;
1422 }
1423
1424 // Inline caches exist only in compiled code
1425 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1426 #ifdef ASSERT
1427 RegisterMap reg_map(current,
1428 RegisterMap::UpdateMap::skip,
1429 RegisterMap::ProcessFrames::include,
1430 RegisterMap::WalkContinuation::skip);
1431 frame stub_frame = current->last_frame();
1432 assert(stub_frame.is_runtime_frame(), "sanity check");
1433 frame caller_frame = stub_frame.sender(®_map);
1434 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1435 #endif /* ASSERT */
1436
1437 methodHandle callee_method;
1438 JRT_BLOCK
1439 callee_method = SharedRuntime::handle_ic_miss_helper(CHECK_NULL);
1440 // Return Method* through TLS
1441 current->set_vm_result_metadata(callee_method());
1442 JRT_BLOCK_END
1443 // return compiled code entry point after potential safepoints
1444 return get_resolved_entry(current, callee_method);
1445 JRT_END
1446
1447
1448 // Handle call site that has been made non-entrant
1449 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1450 // 6243940 We might end up in here if the callee is deoptimized
1451 // as we race to call it. We don't want to take a safepoint if
1452 // the caller was interpreted because the caller frame will look
1453 // interpreted to the stack walkers and arguments are now
1454 // "compiled" so it is much better to make this transition
1455 // invisible to the stack walking code. The i2c path will
1456 // place the callee method in the callee_target. It is stashed
1457 // there because if we try and find the callee by normal means a
1458 // safepoint is possible and have trouble gc'ing the compiled args.
1459 RegisterMap reg_map(current,
1460 RegisterMap::UpdateMap::skip,
1461 RegisterMap::ProcessFrames::include,
1462 RegisterMap::WalkContinuation::skip);
1463 frame stub_frame = current->last_frame();
1464 assert(stub_frame.is_runtime_frame(), "sanity check");
1465 frame caller_frame = stub_frame.sender(®_map);
1466
1467 if (caller_frame.is_interpreted_frame() ||
1468 caller_frame.is_entry_frame() ||
1469 caller_frame.is_upcall_stub_frame()) {
1470 Method* callee = current->callee_target();
1471 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1472 current->set_vm_result_metadata(callee);
1473 current->set_callee_target(nullptr);
1474 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1475 // Bypass class initialization checks in c2i when caller is in native.
1476 // JNI calls to static methods don't have class initialization checks.
1477 // Fast class initialization checks are present in c2i adapters and call into
1478 // SharedRuntime::handle_wrong_method() on the slow path.
1479 //
1480 // JVM upcalls may land here as well, but there's a proper check present in
1481 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1482 // so bypassing it in c2i adapter is benign.
1483 return callee->get_c2i_no_clinit_check_entry();
1484 } else {
1485 return callee->get_c2i_entry();
1486 }
1487 }
1488
1489 // Must be compiled to compiled path which is safe to stackwalk
1490 methodHandle callee_method;
1491 JRT_BLOCK
1492 // Force resolving of caller (if we called from compiled frame)
1493 callee_method = SharedRuntime::reresolve_call_site(CHECK_NULL);
1494 current->set_vm_result_metadata(callee_method());
1495 JRT_BLOCK_END
1496 // return compiled code entry point after potential safepoints
1497 return get_resolved_entry(current, callee_method);
1498 JRT_END
1499
1500 // Handle abstract method call
1501 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1502 // Verbose error message for AbstractMethodError.
1503 // Get the called method from the invoke bytecode.
1504 vframeStream vfst(current, true);
1505 assert(!vfst.at_end(), "Java frame must exist");
1506 methodHandle caller(current, vfst.method());
1507 Bytecode_invoke invoke(caller, vfst.bci());
1508 DEBUG_ONLY( invoke.verify(); )
1509
1510 // Find the compiled caller frame.
1511 RegisterMap reg_map(current,
1512 RegisterMap::UpdateMap::include,
1513 RegisterMap::ProcessFrames::include,
1514 RegisterMap::WalkContinuation::skip);
1515 frame stubFrame = current->last_frame();
1516 assert(stubFrame.is_runtime_frame(), "must be");
1517 frame callerFrame = stubFrame.sender(®_map);
1518 assert(callerFrame.is_compiled_frame(), "must be");
1519
1520 // Install exception and return forward entry.
1521 address res = SharedRuntime::throw_AbstractMethodError_entry();
1522 JRT_BLOCK
1523 methodHandle callee(current, invoke.static_target(current));
1524 if (!callee.is_null()) {
1525 oop recv = callerFrame.retrieve_receiver(®_map);
1526 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1527 res = StubRoutines::forward_exception_entry();
1528 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1529 }
1530 JRT_BLOCK_END
1531 return res;
1532 JRT_END
1533
1534 // return verified_code_entry if interp_only_mode is not set for the current thread;
1535 // otherwise return c2i entry.
1536 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method) {
1537 if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
1538 // In interp_only_mode we need to go to the interpreted entry
1539 // The c2i won't patch in this mode -- see fixup_callers_callsite
1540 return callee_method->get_c2i_entry();
1541 }
1542 assert(callee_method->verified_code_entry() != nullptr, " Jump to zero!");
1543 return callee_method->verified_code_entry();
1544 }
1545
1546 // resolve a static call and patch code
1547 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1548 methodHandle callee_method;
1549 bool enter_special = false;
1550 JRT_BLOCK
1551 callee_method = SharedRuntime::resolve_helper(false, false, CHECK_NULL);
1552 current->set_vm_result_metadata(callee_method());
1553 JRT_BLOCK_END
1554 // return compiled code entry point after potential safepoints
1555 return get_resolved_entry(current, callee_method);
1556 JRT_END
1557
1558 // resolve virtual call and update inline cache to monomorphic
1559 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1560 methodHandle callee_method;
1561 JRT_BLOCK
1562 callee_method = SharedRuntime::resolve_helper(true, false, CHECK_NULL);
1563 current->set_vm_result_metadata(callee_method());
1564 JRT_BLOCK_END
1565 // return compiled code entry point after potential safepoints
1566 return get_resolved_entry(current, callee_method);
1567 JRT_END
1568
1569
1570 // Resolve a virtual call that can be statically bound (e.g., always
1571 // monomorphic, so it has no inline cache). Patch code to resolved target.
1572 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1573 methodHandle callee_method;
1574 JRT_BLOCK
1575 callee_method = SharedRuntime::resolve_helper(true, true, CHECK_NULL);
1576 current->set_vm_result_metadata(callee_method());
1577 JRT_BLOCK_END
1578 // return compiled code entry point after potential safepoints
1579 return get_resolved_entry(current, callee_method);
1580 JRT_END
1581
1582 methodHandle SharedRuntime::handle_ic_miss_helper(TRAPS) {
1583 JavaThread* current = THREAD;
1584 ResourceMark rm(current);
1585 CallInfo call_info;
1586 Bytecodes::Code bc;
1587
1588 // receiver is null for static calls. An exception is thrown for null
1589 // receivers for non-static calls
1590 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1591
1592 methodHandle callee_method(current, call_info.selected_method());
1593
1594 #ifndef PRODUCT
1595 AtomicAccess::inc(&_ic_miss_ctr);
1596
1597 // Statistics & Tracing
1598 if (TraceCallFixup) {
1599 ResourceMark rm(current);
1600 tty->print("IC miss (%s) call to", Bytecodes::name(bc));
1601 callee_method->print_short_name(tty);
1602 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1603 }
1604
1605 if (ICMissHistogram) {
1606 MutexLocker m(VMStatistic_lock);
1607 RegisterMap reg_map(current,
1608 RegisterMap::UpdateMap::skip,
1609 RegisterMap::ProcessFrames::include,
1610 RegisterMap::WalkContinuation::skip);
1611 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1612 // produce statistics under the lock
1613 trace_ic_miss(f.pc());
1614 }
1615 #endif
1616
1617 // install an event collector so that when a vtable stub is created the
1618 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1619 // event can't be posted when the stub is created as locks are held
1620 // - instead the event will be deferred until the event collector goes
1621 // out of scope.
1622 JvmtiDynamicCodeEventCollector event_collector;
1623
1624 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1625 RegisterMap reg_map(current,
1626 RegisterMap::UpdateMap::skip,
1627 RegisterMap::ProcessFrames::include,
1628 RegisterMap::WalkContinuation::skip);
1629 frame caller_frame = current->last_frame().sender(®_map);
1630 CodeBlob* cb = caller_frame.cb();
1631 nmethod* caller_nm = cb->as_nmethod();
1632
1633 CompiledICLocker ml(caller_nm);
1634 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1635 inline_cache->update(&call_info, receiver()->klass());
1636
1637 return callee_method;
1638 }
1639
1640 //
1641 // Resets a call-site in compiled code so it will get resolved again.
1642 // This routines handles both virtual call sites, optimized virtual call
1643 // sites, and static call sites. Typically used to change a call sites
1644 // destination from compiled to interpreted.
1645 //
1646 methodHandle SharedRuntime::reresolve_call_site(TRAPS) {
1647 JavaThread* current = THREAD;
1648 ResourceMark rm(current);
1649 RegisterMap reg_map(current,
1650 RegisterMap::UpdateMap::skip,
1651 RegisterMap::ProcessFrames::include,
1652 RegisterMap::WalkContinuation::skip);
1653 frame stub_frame = current->last_frame();
1654 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1655 frame caller = stub_frame.sender(®_map);
1656
1657 // Do nothing if the frame isn't a live compiled frame.
1658 // nmethod could be deoptimized by the time we get here
1659 // so no update to the caller is needed.
1660
1661 if ((caller.is_compiled_frame() && !caller.is_deoptimized_frame()) ||
1662 (caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic())) {
1663
1664 address pc = caller.pc();
1665
1666 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1667 assert(caller_nm != nullptr, "did not find caller nmethod");
1668
1669 // Default call_addr is the location of the "basic" call.
1670 // Determine the address of the call we a reresolving. With
1671 // Inline Caches we will always find a recognizable call.
1672 // With Inline Caches disabled we may or may not find a
1673 // recognizable call. We will always find a call for static
1674 // calls and for optimized virtual calls. For vanilla virtual
1675 // calls it depends on the state of the UseInlineCaches switch.
1676 //
1677 // With Inline Caches disabled we can get here for a virtual call
1678 // for two reasons:
1679 // 1 - calling an abstract method. The vtable for abstract methods
1680 // will run us thru handle_wrong_method and we will eventually
1681 // end up in the interpreter to throw the ame.
1682 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1683 // call and between the time we fetch the entry address and
1684 // we jump to it the target gets deoptimized. Similar to 1
1685 // we will wind up in the interprter (thru a c2i with c2).
1686 //
1687 CompiledICLocker ml(caller_nm);
1688 address call_addr = caller_nm->call_instruction_address(pc);
1689
1690 if (call_addr != nullptr) {
1691 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1692 // bytes back in the instruction stream so we must also check for reloc info.
1693 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1694 bool ret = iter.next(); // Get item
1695 if (ret) {
1696 switch (iter.type()) {
1697 case relocInfo::static_call_type:
1698 case relocInfo::opt_virtual_call_type: {
1699 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1700 cdc->set_to_clean();
1701 break;
1702 }
1703
1704 case relocInfo::virtual_call_type: {
1705 // compiled, dispatched call (which used to call an interpreted method)
1706 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1707 inline_cache->set_to_clean();
1708 break;
1709 }
1710 default:
1711 break;
1712 }
1713 }
1714 }
1715 }
1716
1717 methodHandle callee_method = find_callee_method(CHECK_(methodHandle()));
1718
1719
1720 #ifndef PRODUCT
1721 AtomicAccess::inc(&_wrong_method_ctr);
1722
1723 if (TraceCallFixup) {
1724 ResourceMark rm(current);
1725 tty->print("handle_wrong_method reresolving call to");
1726 callee_method->print_short_name(tty);
1727 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1728 }
1729 #endif
1730
1731 return callee_method;
1732 }
1733
1734 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1735 // The faulting unsafe accesses should be changed to throw the error
1736 // synchronously instead. Meanwhile the faulting instruction will be
1737 // skipped over (effectively turning it into a no-op) and an
1738 // asynchronous exception will be raised which the thread will
1739 // handle at a later point. If the instruction is a load it will
1740 // return garbage.
1741
1742 // Request an async exception.
1743 thread->set_pending_unsafe_access_error();
1744
1745 // Return address of next instruction to execute.
1911 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
1912
1913 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
1914 if (message == nullptr) {
1915 // Shouldn't happen, but don't cause even more problems if it does
1916 message = const_cast<char*>(caster_klass->external_name());
1917 } else {
1918 jio_snprintf(message,
1919 msglen,
1920 "class %s cannot be cast to class %s (%s%s%s)",
1921 caster_name,
1922 target_name,
1923 caster_klass_description,
1924 klass_separator,
1925 target_klass_description
1926 );
1927 }
1928 return message;
1929 }
1930
1931 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
1932 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
1933 JRT_END
1934
1935 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
1936 if (!SafepointSynchronize::is_synchronizing()) {
1937 // Only try quick_enter() if we're not trying to reach a safepoint
1938 // so that the calling thread reaches the safepoint more quickly.
1939 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
1940 return;
1941 }
1942 }
1943 // NO_ASYNC required because an async exception on the state transition destructor
1944 // would leave you with the lock held and it would never be released.
1945 // The normal monitorenter NullPointerException is thrown without acquiring a lock
1946 // and the model is that an exception implies the method failed.
1947 JRT_BLOCK_NO_ASYNC
1948 Handle h_obj(THREAD, obj);
1949 ObjectSynchronizer::enter(h_obj, lock, current);
1950 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2144 tty->print_cr("Note 1: counter updates are not MT-safe.");
2145 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2146 tty->print_cr(" %% in nested categories are relative to their category");
2147 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2148 tty->cr();
2149
2150 MethodArityHistogram h;
2151 }
2152 #endif
2153
2154 #ifndef PRODUCT
2155 static int _lookups; // number of calls to lookup
2156 static int _equals; // number of buckets checked with matching hash
2157 static int _archived_hits; // number of successful lookups in archived table
2158 static int _runtime_hits; // number of successful lookups in runtime table
2159 #endif
2160
2161 // A simple wrapper class around the calling convention information
2162 // that allows sharing of adapters for the same calling convention.
2163 class AdapterFingerPrint : public MetaspaceObj {
2164 private:
2165 enum {
2166 _basic_type_bits = 4,
2167 _basic_type_mask = right_n_bits(_basic_type_bits),
2168 _basic_types_per_int = BitsPerInt / _basic_type_bits,
2169 };
2170 // TO DO: Consider integrating this with a more global scheme for compressing signatures.
2171 // For now, 4 bits per components (plus T_VOID gaps after double/long) is not excessive.
2172
2173 int _length;
2174
2175 static int data_offset() { return sizeof(AdapterFingerPrint); }
2176 int* data_pointer() {
2177 return (int*)((address)this + data_offset());
2178 }
2179
2180 // Private construtor. Use allocate() to get an instance.
2181 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt, int len) {
2182 int* data = data_pointer();
2183 // Pack the BasicTypes with 8 per int
2184 assert(len == length(total_args_passed), "sanity");
2185 _length = len;
2186 int sig_index = 0;
2187 for (int index = 0; index < _length; index++) {
2188 int value = 0;
2189 for (int byte = 0; sig_index < total_args_passed && byte < _basic_types_per_int; byte++) {
2190 int bt = adapter_encoding(sig_bt[sig_index++]);
2191 assert((bt & _basic_type_mask) == bt, "must fit in 4 bits");
2192 value = (value << _basic_type_bits) | bt;
2193 }
2194 data[index] = value;
2195 }
2196 }
2197
2198 // Call deallocate instead
2199 ~AdapterFingerPrint() {
2200 ShouldNotCallThis();
2201 }
2202
2203 static int length(int total_args) {
2204 return (total_args + (_basic_types_per_int-1)) / _basic_types_per_int;
2205 }
2206
2207 static int compute_size_in_words(int len) {
2208 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(int)));
2209 }
2210
2211 // Remap BasicTypes that are handled equivalently by the adapters.
2212 // These are correct for the current system but someday it might be
2213 // necessary to make this mapping platform dependent.
2214 static int adapter_encoding(BasicType in) {
2215 switch (in) {
2216 case T_BOOLEAN:
2217 case T_BYTE:
2218 case T_SHORT:
2219 case T_CHAR:
2220 // There are all promoted to T_INT in the calling convention
2221 return T_INT;
2222
2223 case T_OBJECT:
2224 case T_ARRAY:
2225 // In other words, we assume that any register good enough for
2226 // an int or long is good enough for a managed pointer.
2227 #ifdef _LP64
2228 return T_LONG;
2229 #else
2230 return T_INT;
2231 #endif
2232
2233 case T_INT:
2234 case T_LONG:
2235 case T_FLOAT:
2236 case T_DOUBLE:
2237 case T_VOID:
2238 return in;
2239
2240 default:
2241 ShouldNotReachHere();
2242 return T_CONFLICT;
2243 }
2244 }
2245
2246 void* operator new(size_t size, size_t fp_size) throw() {
2247 assert(fp_size >= size, "sanity check");
2248 void* p = AllocateHeap(fp_size, mtCode);
2249 memset(p, 0, fp_size);
2250 return p;
2251 }
2252
2253 template<typename Function>
2254 void iterate_args(Function function) {
2255 for (int i = 0; i < length(); i++) {
2256 unsigned val = (unsigned)value(i);
2257 // args are packed so that first/lower arguments are in the highest
2258 // bits of each int value, so iterate from highest to the lowest
2259 for (int j = 32 - _basic_type_bits; j >= 0; j -= _basic_type_bits) {
2260 unsigned v = (val >> j) & _basic_type_mask;
2261 if (v == 0) {
2262 continue;
2263 }
2264 function(v);
2265 }
2266 }
2267 }
2268
2269 public:
2270 static AdapterFingerPrint* allocate(int total_args_passed, BasicType* sig_bt) {
2271 int len = length(total_args_passed);
2272 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2273 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(total_args_passed, sig_bt, len);
2274 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2275 return afp;
2276 }
2277
2278 static void deallocate(AdapterFingerPrint* fp) {
2279 FreeHeap(fp);
2280 }
2281
2282 int value(int index) {
2283 int* data = data_pointer();
2284 return data[index];
2285 }
2286
2287 int length() {
2288 return _length;
2289 }
2290
2291 unsigned int compute_hash() {
2292 int hash = 0;
2293 for (int i = 0; i < length(); i++) {
2294 int v = value(i);
2295 //Add arithmetic operation to the hash, like +3 to improve hashing
2296 hash = ((hash << 8) ^ v ^ (hash >> 5)) + 3;
2297 }
2298 return (unsigned int)hash;
2299 }
2300
2301 const char* as_string() {
2302 stringStream st;
2303 st.print("0x");
2304 for (int i = 0; i < length(); i++) {
2305 st.print("%x", value(i));
2306 }
2307 return st.as_string();
2308 }
2309
2310 const char* as_basic_args_string() {
2311 stringStream st;
2312 bool long_prev = false;
2313 iterate_args([&] (int arg) {
2314 if (long_prev) {
2315 long_prev = false;
2316 if (arg == T_VOID) {
2317 st.print("J");
2318 } else {
2319 st.print("L");
2320 }
2321 }
2322 switch (arg) {
2323 case T_INT: st.print("I"); break;
2324 case T_LONG: long_prev = true; break;
2325 case T_FLOAT: st.print("F"); break;
2326 case T_DOUBLE: st.print("D"); break;
2327 case T_VOID: break;
2328 default: ShouldNotReachHere();
2329 }
2330 });
2331 if (long_prev) {
2332 st.print("L");
2333 }
2334 return st.as_string();
2335 }
2336
2337 BasicType* as_basic_type(int& nargs) {
2338 nargs = 0;
2339 GrowableArray<BasicType> btarray;
2340 bool long_prev = false;
2341
2342 iterate_args([&] (int arg) {
2343 if (long_prev) {
2344 long_prev = false;
2345 if (arg == T_VOID) {
2346 btarray.append(T_LONG);
2347 } else {
2348 btarray.append(T_OBJECT); // it could be T_ARRAY; it shouldn't matter
2349 }
2350 }
2351 switch (arg) {
2352 case T_INT: // fallthrough
2353 case T_FLOAT: // fallthrough
2354 case T_DOUBLE:
2355 case T_VOID:
2356 btarray.append((BasicType)arg);
2357 break;
2358 case T_LONG:
2359 long_prev = true;
2360 break;
2361 default: ShouldNotReachHere();
2362 }
2363 });
2364
2365 if (long_prev) {
2366 btarray.append(T_OBJECT);
2367 }
2368
2369 nargs = btarray.length();
2370 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, nargs);
2371 int index = 0;
2372 GrowableArrayIterator<BasicType> iter = btarray.begin();
2373 while (iter != btarray.end()) {
2374 sig_bt[index++] = *iter;
2375 ++iter;
2376 }
2377 assert(index == btarray.length(), "sanity check");
2378 #ifdef ASSERT
2379 {
2380 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(nargs, sig_bt);
2381 assert(this->equals(compare_fp), "sanity check");
2382 AdapterFingerPrint::deallocate(compare_fp);
2383 }
2384 #endif
2385 return sig_bt;
2386 }
2387
2388 bool equals(AdapterFingerPrint* other) {
2389 if (other->_length != _length) {
2390 return false;
2391 } else {
2392 for (int i = 0; i < _length; i++) {
2393 if (value(i) != other->value(i)) {
2394 return false;
2395 }
2396 }
2397 }
2398 return true;
2399 }
2400
2401 // methods required by virtue of being a MetaspaceObj
2402 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2403 int size() const { return compute_size_in_words(_length); }
2404 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2405
2406 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2407 NOT_PRODUCT(_equals++);
2408 return fp1->equals(fp2);
2409 }
2410
2411 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2412 return fp->compute_hash();
2413 }
2416 #if INCLUDE_CDS
2417 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2418 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2419 }
2420
2421 class ArchivedAdapterTable : public OffsetCompactHashtable<
2422 AdapterFingerPrint*,
2423 AdapterHandlerEntry*,
2424 adapter_fp_equals_compact_hashtable_entry> {};
2425 #endif // INCLUDE_CDS
2426
2427 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2428 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2429 AnyObj::C_HEAP, mtCode,
2430 AdapterFingerPrint::compute_hash,
2431 AdapterFingerPrint::equals>;
2432 static AdapterHandlerTable* _adapter_handler_table;
2433 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2434
2435 // Find a entry with the same fingerprint if it exists
2436 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(int total_args_passed, BasicType* sig_bt) {
2437 NOT_PRODUCT(_lookups++);
2438 assert_lock_strong(AdapterHandlerLibrary_lock);
2439 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2440 AdapterHandlerEntry* entry = nullptr;
2441 #if INCLUDE_CDS
2442 // if we are building the archive then the archived adapter table is
2443 // not valid and we need to use the ones added to the runtime table
2444 if (AOTCodeCache::is_using_adapter()) {
2445 // Search archived table first. It is read-only table so can be searched without lock
2446 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2447 #ifndef PRODUCT
2448 if (entry != nullptr) {
2449 _archived_hits++;
2450 }
2451 #endif
2452 }
2453 #endif // INCLUDE_CDS
2454 if (entry == nullptr) {
2455 assert_lock_strong(AdapterHandlerLibrary_lock);
2456 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2457 if (entry_p != nullptr) {
2458 entry = *entry_p;
2459 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2476 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2477 ts.print(tty, "AdapterHandlerTable");
2478 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2479 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2480 int total_hits = _archived_hits + _runtime_hits;
2481 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2482 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2483 }
2484 #endif
2485
2486 // ---------------------------------------------------------------------------
2487 // Implementation of AdapterHandlerLibrary
2488 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2489 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2490 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2491 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2492 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2493 #if INCLUDE_CDS
2494 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2495 #endif // INCLUDE_CDS
2496 static const int AdapterHandlerLibrary_size = 16*K;
2497 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2498 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2499
2500 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2501 assert(_buffer != nullptr, "should be initialized");
2502 return _buffer;
2503 }
2504
2505 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2506 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2507 AdapterBlob* adapter_blob = entry->adapter_blob();
2508 char blob_id[256];
2509 jio_snprintf(blob_id,
2510 sizeof(blob_id),
2511 "%s(%s)",
2512 adapter_blob->name(),
2513 entry->fingerprint()->as_string());
2514 if (Forte::is_enabled()) {
2515 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2516 }
2524 void AdapterHandlerLibrary::initialize() {
2525 {
2526 ResourceMark rm;
2527 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2528 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2529 }
2530
2531 #if INCLUDE_CDS
2532 // Link adapters in AOT Cache to their code in AOT Code Cache
2533 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2534 link_aot_adapters();
2535 lookup_simple_adapters();
2536 return;
2537 }
2538 #endif // INCLUDE_CDS
2539
2540 ResourceMark rm;
2541 {
2542 MutexLocker mu(AdapterHandlerLibrary_lock);
2543
2544 _no_arg_handler = create_adapter(0, nullptr);
2545
2546 BasicType obj_args[] = { T_OBJECT };
2547 _obj_arg_handler = create_adapter(1, obj_args);
2548
2549 BasicType int_args[] = { T_INT };
2550 _int_arg_handler = create_adapter(1, int_args);
2551
2552 BasicType obj_int_args[] = { T_OBJECT, T_INT };
2553 _obj_int_arg_handler = create_adapter(2, obj_int_args);
2554
2555 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
2556 _obj_obj_arg_handler = create_adapter(2, obj_obj_args);
2557
2558 // we should always get an entry back but we don't have any
2559 // associated blob on Zero
2560 assert(_no_arg_handler != nullptr &&
2561 _obj_arg_handler != nullptr &&
2562 _int_arg_handler != nullptr &&
2563 _obj_int_arg_handler != nullptr &&
2564 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2565 }
2566
2567 // Outside of the lock
2568 #ifndef ZERO
2569 // no blobs to register when we are on Zero
2570 post_adapter_creation(_no_arg_handler);
2571 post_adapter_creation(_obj_arg_handler);
2572 post_adapter_creation(_int_arg_handler);
2573 post_adapter_creation(_obj_int_arg_handler);
2574 post_adapter_creation(_obj_obj_arg_handler);
2575 #endif // ZERO
2576 }
2577
2578 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2579 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2580 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2581 return AdapterHandlerEntry::allocate(id, fingerprint);
2582 }
2583
2584 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2585 int total_args_passed = method->size_of_parameters(); // All args on stack
2586 if (total_args_passed == 0) {
2587 return _no_arg_handler;
2588 } else if (total_args_passed == 1) {
2589 if (!method->is_static()) {
2590 return _obj_arg_handler;
2591 }
2592 switch (method->signature()->char_at(1)) {
2593 case JVM_SIGNATURE_CLASS:
2594 case JVM_SIGNATURE_ARRAY:
2595 return _obj_arg_handler;
2596 case JVM_SIGNATURE_INT:
2597 case JVM_SIGNATURE_BOOLEAN:
2598 case JVM_SIGNATURE_CHAR:
2599 case JVM_SIGNATURE_BYTE:
2600 case JVM_SIGNATURE_SHORT:
2601 return _int_arg_handler;
2602 }
2603 } else if (total_args_passed == 2 &&
2604 !method->is_static()) {
2605 switch (method->signature()->char_at(1)) {
2606 case JVM_SIGNATURE_CLASS:
2607 case JVM_SIGNATURE_ARRAY:
2608 return _obj_obj_arg_handler;
2609 case JVM_SIGNATURE_INT:
2610 case JVM_SIGNATURE_BOOLEAN:
2611 case JVM_SIGNATURE_CHAR:
2612 case JVM_SIGNATURE_BYTE:
2613 case JVM_SIGNATURE_SHORT:
2614 return _obj_int_arg_handler;
2615 }
2616 }
2617 return nullptr;
2618 }
2619
2620 class AdapterSignatureIterator : public SignatureIterator {
2621 private:
2622 BasicType stack_sig_bt[16];
2623 BasicType* sig_bt;
2624 int index;
2625
2626 public:
2627 AdapterSignatureIterator(Symbol* signature,
2628 fingerprint_t fingerprint,
2629 bool is_static,
2630 int total_args_passed) :
2631 SignatureIterator(signature, fingerprint),
2632 index(0)
2633 {
2634 sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
2635 if (!is_static) { // Pass in receiver first
2636 sig_bt[index++] = T_OBJECT;
2637 }
2638 do_parameters_on(this);
2639 }
2640
2641 BasicType* basic_types() {
2642 return sig_bt;
2643 }
2644
2645 #ifdef ASSERT
2646 int slots() {
2647 return index;
2648 }
2649 #endif
2650
2651 private:
2652
2653 friend class SignatureIterator; // so do_parameters_on can call do_type
2654 void do_type(BasicType type) {
2655 sig_bt[index++] = type;
2656 if (type == T_LONG || type == T_DOUBLE) {
2657 sig_bt[index++] = T_VOID; // Longs & doubles take 2 Java slots
2658 }
2659 }
2660 };
2661
2662
2663 const char* AdapterHandlerEntry::_entry_names[] = {
2664 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
2665 };
2666
2667 #ifdef ASSERT
2668 void AdapterHandlerLibrary::verify_adapter_sharing(int total_args_passed, BasicType* sig_bt, AdapterHandlerEntry* cached_entry) {
2669 // we can only check for the same code if there is any
2670 #ifndef ZERO
2671 AdapterHandlerEntry* comparison_entry = create_adapter(total_args_passed, sig_bt, true);
2672 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
2673 assert(comparison_entry->compare_code(cached_entry), "code must match");
2674 // Release the one just created
2675 AdapterHandlerEntry::deallocate(comparison_entry);
2676 # endif // ZERO
2677 }
2678 #endif /* ASSERT*/
2679
2680 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
2681 assert(!method->is_abstract(), "abstract methods do not have adapters");
2682 // Use customized signature handler. Need to lock around updates to
2683 // the _adapter_handler_table (it is not safe for concurrent readers
2684 // and a single writer: this could be fixed if it becomes a
2685 // problem).
2686
2687 // Fast-path for trivial adapters
2688 AdapterHandlerEntry* entry = get_simple_adapter(method);
2689 if (entry != nullptr) {
2690 return entry;
2691 }
2692
2693 ResourceMark rm;
2694 bool new_entry = false;
2695
2696 // Fill in the signature array, for the calling-convention call.
2697 int total_args_passed = method->size_of_parameters(); // All args on stack
2698
2699 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
2700 method->is_static(), total_args_passed);
2701 assert(si.slots() == total_args_passed, "");
2702 BasicType* sig_bt = si.basic_types();
2703 {
2704 MutexLocker mu(AdapterHandlerLibrary_lock);
2705
2706 // Lookup method signature's fingerprint
2707 entry = lookup(total_args_passed, sig_bt);
2708
2709 if (entry != nullptr) {
2710 #ifndef ZERO
2711 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
2712 #endif
2713 #ifdef ASSERT
2714 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
2715 verify_adapter_sharing(total_args_passed, sig_bt, entry);
2716 }
2717 #endif
2718 } else {
2719 entry = create_adapter(total_args_passed, sig_bt);
2720 if (entry != nullptr) {
2721 new_entry = true;
2722 }
2723 }
2724 }
2725
2726 // Outside of the lock
2727 if (new_entry) {
2728 post_adapter_creation(entry);
2729 }
2730 return entry;
2731 }
2732
2733 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
2734 ResourceMark rm;
2735 const char* name = AdapterHandlerLibrary::name(handler);
2736 const uint32_t id = AdapterHandlerLibrary::id(handler);
2737
2738 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
2739 if (blob != nullptr) {
2754 }
2755 insts_size = adapter_blob->code_size();
2756 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
2757 handler->fingerprint()->as_basic_args_string(),
2758 handler->fingerprint()->as_string(), insts_size);
2759 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
2760 if (Verbose || PrintStubCode) {
2761 address first_pc = adapter_blob->content_begin();
2762 if (first_pc != nullptr) {
2763 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
2764 st->cr();
2765 }
2766 }
2767 }
2768 #endif // PRODUCT
2769
2770 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
2771 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
2772 entry_offset[AdapterBlob::I2C] = 0;
2773 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
2774 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
2775 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
2776 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
2777 } else {
2778 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
2779 }
2780 }
2781
2782 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
2783 int total_args_passed,
2784 BasicType* sig_bt,
2785 bool is_transient) {
2786 if (log_is_enabled(Info, perf, class, link)) {
2787 ClassLoader::perf_method_adapters_count()->inc();
2788 }
2789
2790 #ifndef ZERO
2791 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
2792 CodeBuffer buffer(buf);
2793 short buffer_locs[20];
2794 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
2795 sizeof(buffer_locs)/sizeof(relocInfo));
2796 MacroAssembler masm(&buffer);
2797 VMRegPair stack_regs[16];
2798 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
2799
2800 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
2801 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
2802 address entry_address[AdapterBlob::ENTRY_COUNT];
2803 SharedRuntime::generate_i2c2i_adapters(&masm,
2804 total_args_passed,
2805 comp_args_on_stack,
2806 sig_bt,
2807 regs,
2808 entry_address);
2809 // On zero there is no code to save and no need to create a blob and
2810 // or relocate the handler.
2811 int entry_offset[AdapterBlob::ENTRY_COUNT];
2812 address_to_offset(entry_address, entry_offset);
2813 #ifdef ASSERT
2814 if (VerifyAdapterSharing) {
2815 handler->save_code(buf->code_begin(), buffer.insts_size());
2816 if (is_transient) {
2817 return true;
2818 }
2819 }
2820 #endif
2821 AdapterBlob* adapter_blob = AdapterBlob::create(&buffer, entry_offset);
2822 if (adapter_blob == nullptr) {
2823 // CodeCache is full, disable compilation
2824 // Ought to log this but compile log is only per compile thread
2825 // and we're some non descript Java thread.
2826 return false;
2827 }
2828 handler->set_adapter_blob(adapter_blob);
2829 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
2830 // try to save generated code
2831 const char* name = AdapterHandlerLibrary::name(handler);
2832 const uint32_t id = AdapterHandlerLibrary::id(handler);
2833 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
2834 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
2835 }
2836 #endif // ZERO
2837
2838 #ifndef PRODUCT
2839 // debugging support
2840 if (PrintAdapterHandlers || PrintStubCode) {
2841 print_adapter_handler_info(tty, handler);
2842 }
2843 #endif
2844
2845 return true;
2846 }
2847
2848 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(int total_args_passed,
2849 BasicType* sig_bt,
2850 bool is_transient) {
2851 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2852 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
2853 if (!generate_adapter_code(handler, total_args_passed, sig_bt, is_transient)) {
2854 AdapterHandlerEntry::deallocate(handler);
2855 return nullptr;
2856 }
2857 if (!is_transient) {
2858 assert_lock_strong(AdapterHandlerLibrary_lock);
2859 _adapter_handler_table->put(fp, handler);
2860 }
2861 return handler;
2862 }
2863
2864 #if INCLUDE_CDS
2865 void AdapterHandlerEntry::remove_unshareable_info() {
2866 #ifdef ASSERT
2867 _saved_code = nullptr;
2868 _saved_code_length = 0;
2869 #endif // ASSERT
2870 _adapter_blob = nullptr;
2871 _linked = false;
2872 }
2873
2874 class CopyAdapterTableToArchive : StackObj {
2875 private:
2876 CompactHashtableWriter* _writer;
2877 ArchiveBuilder* _builder;
2878 public:
2879 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
2880 _builder(ArchiveBuilder::current())
2881 {}
2882
2883 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
2884 LogStreamHandle(Trace, aot) lsh;
2885 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
2886 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
2887 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
2888 assert(buffered_fp != nullptr,"sanity check");
2889 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
2890 assert(buffered_entry != nullptr,"sanity check");
2891
2931 }
2932 #endif
2933 }
2934
2935 // This method is used during production run to link archived adapters (stored in AOT Cache)
2936 // to their code in AOT Code Cache
2937 void AdapterHandlerEntry::link() {
2938 ResourceMark rm;
2939 assert(_fingerprint != nullptr, "_fingerprint must not be null");
2940 bool generate_code = false;
2941 // Generate code only if AOTCodeCache is not available, or
2942 // caching adapters is disabled, or we fail to link
2943 // the AdapterHandlerEntry to its code in the AOTCodeCache
2944 if (AOTCodeCache::is_using_adapter()) {
2945 AdapterHandlerLibrary::link_aot_adapter_handler(this);
2946 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
2947 if (_adapter_blob == nullptr) {
2948 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
2949 generate_code = true;
2950 }
2951 } else {
2952 generate_code = true;
2953 }
2954 if (generate_code) {
2955 int nargs;
2956 BasicType* bt = _fingerprint->as_basic_type(nargs);
2957 if (!AdapterHandlerLibrary::generate_adapter_code(this, nargs, bt, /* is_transient */ false)) {
2958 // Don't throw exceptions during VM initialization because java.lang.* classes
2959 // might not have been initialized, causing problems when constructing the
2960 // Java exception object.
2961 vm_exit_during_initialization("Out of space in CodeCache for adapters");
2962 }
2963 }
2964 if (_adapter_blob != nullptr) {
2965 post_adapter_creation(this);
2966 }
2967 assert(_linked, "AdapterHandlerEntry must now be linked");
2968 }
2969
2970 void AdapterHandlerLibrary::link_aot_adapters() {
2971 uint max_id = 0;
2972 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
2973 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
2974 * That implies adapter ids of the adapters in the cache may not be contiguous.
2975 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
2976 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
2977 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
2978 */
2979 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
2980 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
2981 entry->link();
2982 max_id = MAX2(max_id, entry->id());
2983 });
2984 // Set adapter id to the maximum id found in the AOTCache
2985 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
2986 _id_counter = max_id;
2987 }
2988
2989 // This method is called during production run to lookup simple adapters
2990 // in the archived adapter handler table
2991 void AdapterHandlerLibrary::lookup_simple_adapters() {
2992 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
2993
2994 MutexLocker mu(AdapterHandlerLibrary_lock);
2995 _no_arg_handler = lookup(0, nullptr);
2996
2997 BasicType obj_args[] = { T_OBJECT };
2998 _obj_arg_handler = lookup(1, obj_args);
2999
3000 BasicType int_args[] = { T_INT };
3001 _int_arg_handler = lookup(1, int_args);
3002
3003 BasicType obj_int_args[] = { T_OBJECT, T_INT };
3004 _obj_int_arg_handler = lookup(2, obj_int_args);
3005
3006 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
3007 _obj_obj_arg_handler = lookup(2, obj_obj_args);
3008
3009 assert(_no_arg_handler != nullptr &&
3010 _obj_arg_handler != nullptr &&
3011 _int_arg_handler != nullptr &&
3012 _obj_int_arg_handler != nullptr &&
3013 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3014 assert(_no_arg_handler->is_linked() &&
3015 _obj_arg_handler->is_linked() &&
3016 _int_arg_handler->is_linked() &&
3017 _obj_int_arg_handler->is_linked() &&
3018 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3019 }
3020 #endif // INCLUDE_CDS
3021
3022 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3023 LogStreamHandle(Trace, aot) lsh;
3024 if (lsh.is_enabled()) {
3025 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3026 lsh.cr();
3027 }
3028 it->push(&_fingerprint);
3029 }
3030
3031 AdapterHandlerEntry::~AdapterHandlerEntry() {
3032 if (_fingerprint != nullptr) {
3033 AdapterFingerPrint::deallocate(_fingerprint);
3034 _fingerprint = nullptr;
3035 }
3036 #ifdef ASSERT
3037 FREE_C_HEAP_ARRAY(_saved_code);
3038 #endif
3039 FreeHeap(this);
3040 }
3041
3042
3043 #ifdef ASSERT
3044 // Capture the code before relocation so that it can be compared
3045 // against other versions. If the code is captured after relocation
3046 // then relative instructions won't be equivalent.
3047 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3048 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3049 _saved_code_length = length;
3050 memcpy(_saved_code, buffer, length);
3051 }
3052
3053
3054 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3055 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3103
3104 struct { double data[20]; } locs_buf;
3105 struct { double data[20]; } stubs_locs_buf;
3106 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3107 #if defined(AARCH64) || defined(PPC64)
3108 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3109 // in the constant pool to ensure ordering between the barrier and oops
3110 // accesses. For native_wrappers we need a constant.
3111 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3112 // static java call that is resolved in the runtime.
3113 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3114 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3115 }
3116 #endif
3117 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3118 MacroAssembler _masm(&buffer);
3119
3120 // Fill in the signature array, for the calling-convention call.
3121 const int total_args_passed = method->size_of_parameters();
3122
3123 VMRegPair stack_regs[16];
3124 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3125
3126 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
3127 method->is_static(), total_args_passed);
3128 BasicType* sig_bt = si.basic_types();
3129 assert(si.slots() == total_args_passed, "");
3130 BasicType ret_type = si.return_type();
3131
3132 // Now get the compiled-Java arguments layout.
3133 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3134
3135 // Generate the compiled-to-native wrapper code
3136 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3137
3138 if (nm != nullptr) {
3139 {
3140 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3141 if (nm->make_in_use()) {
3142 method->set_code(method, nm);
3143 }
3144 }
3145
3146 CompilerDirectiveMatcher matcher(method, CompLevel_simple);
3147 if (matcher.directive_set()->PrintAssemblyOption) {
3148 nm->print_code();
3149 }
3150 }
3357 if (b == handler->adapter_blob()) {
3358 found = true;
3359 st->print("Adapter for signature: ");
3360 handler->print_adapter_on(st);
3361 return false; // abort iteration
3362 } else {
3363 return true; // keep looking
3364 }
3365 };
3366 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3367 _adapter_handler_table->iterate(findblob_runtime_table);
3368 }
3369 assert(found, "Should have found handler");
3370 }
3371
3372 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3373 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3374 if (adapter_blob() != nullptr) {
3375 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3376 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3377 st->print(" c2iUV: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3378 if (get_c2i_no_clinit_check_entry() != nullptr) {
3379 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3380 }
3381 }
3382 st->cr();
3383 }
3384
3385 #ifndef PRODUCT
3386
3387 void AdapterHandlerLibrary::print_statistics() {
3388 print_table_statistics();
3389 }
3390
3391 #endif /* PRODUCT */
3392
3393 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3394 assert(current == JavaThread::current(), "pre-condition");
3395 StackOverflow* overflow_state = current->stack_overflow_state();
3396 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3397 overflow_state->set_reserved_stack_activation(current->stack_base());
3444 event.set_method(method);
3445 event.commit();
3446 }
3447 }
3448 }
3449 return activation;
3450 }
3451
3452 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
3453 // After any safepoint, just before going back to compiled code,
3454 // we inform the GC that we will be doing initializing writes to
3455 // this object in the future without emitting card-marks, so
3456 // GC may take any compensating steps.
3457
3458 oop new_obj = current->vm_result_oop();
3459 if (new_obj == nullptr) return;
3460
3461 BarrierSet *bs = BarrierSet::barrier_set();
3462 bs->on_slowpath_allocation_exit(current, new_obj);
3463 }
|
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/aotCodeCache.hpp"
35 #include "code/codeCache.hpp"
36 #include "code/compiledIC.hpp"
37 #include "code/nmethod.inline.hpp"
38 #include "code/scopeDesc.hpp"
39 #include "code/vtableStubs.hpp"
40 #include "compiler/abstractCompiler.hpp"
41 #include "compiler/compileBroker.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/collectedHeap.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/interpreterRuntime.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "metaprogramming/primitiveConversions.hpp"
54 #include "oops/access.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/klass.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "prims/forte.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "prims/methodHandles.hpp"
66 #include "prims/nativeLookup.hpp"
67 #include "runtime/arguments.hpp"
68 #include "runtime/atomicAccess.hpp"
69 #include "runtime/basicLock.inline.hpp"
70 #include "runtime/frame.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/init.hpp"
73 #include "runtime/interfaceSupport.inline.hpp"
74 #include "runtime/java.hpp"
75 #include "runtime/javaCalls.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/osThread.hpp"
78 #include "runtime/perfData.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "runtime/signature.hpp"
81 #include "runtime/stackWatermarkSet.hpp"
82 #include "runtime/stubRoutines.hpp"
83 #include "runtime/synchronizer.hpp"
84 #include "runtime/timerTrace.hpp"
85 #include "runtime/vframe.inline.hpp"
86 #include "runtime/vframeArray.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/copy.hpp"
89 #include "utilities/dtrace.hpp"
90 #include "utilities/events.hpp"
91 #include "utilities/exceptions.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/hashTable.hpp"
94 #include "utilities/macros.hpp"
95 #include "utilities/xmlstream.hpp"
96 #ifdef COMPILER1
97 #include "c1/c1_Runtime1.hpp"
98 #endif
99 #ifdef COMPILER2
100 #include "opto/runtime.hpp"
1173 // for a call current in progress, i.e., arguments has been pushed on stack
1174 // but callee has not been invoked yet. Caller frame must be compiled.
1175 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1176 CallInfo& callinfo, TRAPS) {
1177 Handle receiver;
1178 Handle nullHandle; // create a handy null handle for exception returns
1179 JavaThread* current = THREAD;
1180
1181 assert(!vfst.at_end(), "Java frame must exist");
1182
1183 // Find caller and bci from vframe
1184 methodHandle caller(current, vfst.method());
1185 int bci = vfst.bci();
1186
1187 if (caller->is_continuation_enter_intrinsic()) {
1188 bc = Bytecodes::_invokestatic;
1189 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1190 return receiver;
1191 }
1192
1193 // Substitutability test implementation piggy backs on static call resolution
1194 Bytecodes::Code code = caller->java_code_at(bci);
1195 if (code == Bytecodes::_if_acmpeq || code == Bytecodes::_if_acmpne) {
1196 bc = Bytecodes::_invokestatic;
1197 methodHandle attached_method(THREAD, extract_attached_method(vfst));
1198 assert(attached_method.not_null(), "must have attached method");
1199 vmClasses::ValueObjectMethods_klass()->initialize(CHECK_NH);
1200 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, false, CHECK_NH);
1201 #ifdef ASSERT
1202 Symbol* subst_method_name = vmSymbols::isSubstitutable_name();
1203 Method* is_subst = vmClasses::ValueObjectMethods_klass()->find_method(subst_method_name, vmSymbols::object_object_boolean_signature());
1204 assert(callinfo.selected_method() == is_subst, "must be isSubstitutable method");
1205 #endif
1206 return receiver;
1207 }
1208
1209 Bytecode_invoke bytecode(caller, bci);
1210 int bytecode_index = bytecode.index();
1211 bc = bytecode.invoke_code();
1212
1213 methodHandle attached_method(current, extract_attached_method(vfst));
1214 if (attached_method.not_null()) {
1215 Method* callee = bytecode.static_target(CHECK_NH);
1216 vmIntrinsics::ID id = callee->intrinsic_id();
1217 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1218 // it attaches statically resolved method to the call site.
1219 if (MethodHandles::is_signature_polymorphic(id) &&
1220 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1221 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1222
1223 // Adjust invocation mode according to the attached method.
1224 switch (bc) {
1225 case Bytecodes::_invokevirtual:
1226 if (attached_method->method_holder()->is_interface()) {
1227 bc = Bytecodes::_invokeinterface;
1228 }
1229 break;
1230 case Bytecodes::_invokeinterface:
1231 if (!attached_method->method_holder()->is_interface()) {
1232 bc = Bytecodes::_invokevirtual;
1233 }
1234 break;
1235 case Bytecodes::_invokehandle:
1236 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1237 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1238 : Bytecodes::_invokevirtual;
1239 }
1240 break;
1241 default:
1242 break;
1243 }
1244 } else {
1245 assert(attached_method->has_scalarized_args(), "invalid use of attached method");
1246 if (!attached_method->method_holder()->is_inline_klass() || attached_method->is_static()) {
1247 // Ignore the attached method in this case to not confuse below code
1248 attached_method = methodHandle(current, nullptr);
1249 }
1250 }
1251 }
1252
1253 assert(bc != Bytecodes::_illegal, "not initialized");
1254
1255 bool has_receiver = bc != Bytecodes::_invokestatic &&
1256 bc != Bytecodes::_invokedynamic &&
1257 bc != Bytecodes::_invokehandle;
1258 bool check_null_and_abstract = true;
1259
1260 // Find receiver for non-static call
1261 if (has_receiver) {
1262 // This register map must be update since we need to find the receiver for
1263 // compiled frames. The receiver might be in a register.
1264 RegisterMap reg_map2(current,
1265 RegisterMap::UpdateMap::include,
1266 RegisterMap::ProcessFrames::include,
1267 RegisterMap::WalkContinuation::skip);
1268 frame stubFrame = current->last_frame();
1269 // Caller-frame is a compiled frame
1270 frame callerFrame = stubFrame.sender(®_map2);
1271
1272 Method* callee = attached_method();
1273 if (callee == nullptr) {
1274 callee = bytecode.static_target(CHECK_NH);
1275 if (callee == nullptr) {
1276 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1277 }
1278 }
1279 bool caller_is_c1 = callerFrame.is_compiled_frame() && callerFrame.cb()->as_nmethod()->is_compiled_by_c1();
1280 if (!caller_is_c1 && callee->is_scalarized_arg(0)) {
1281 // If the receiver is an inline type that is passed as fields, no oop is available
1282 // Resolve the call without receiver null checking.
1283 assert(!callee->mismatch(), "calls with inline type receivers should never mismatch");
1284 assert(attached_method.not_null() && !attached_method->is_abstract(), "must have non-abstract attached method");
1285 if (bc == Bytecodes::_invokeinterface) {
1286 bc = Bytecodes::_invokevirtual; // C2 optimistically replaces interface calls by virtual calls
1287 }
1288 check_null_and_abstract = false;
1289 } else {
1290 // Retrieve from a compiled argument list
1291 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1292 assert(oopDesc::is_oop_or_null(receiver()), "");
1293 if (receiver.is_null()) {
1294 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1295 }
1296 }
1297 }
1298
1299 // Resolve method
1300 if (attached_method.not_null()) {
1301 // Parameterized by attached method.
1302 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, check_null_and_abstract, CHECK_NH);
1303 } else {
1304 // Parameterized by bytecode.
1305 constantPoolHandle constants(current, caller->constants());
1306 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1307 }
1308
1309 #ifdef ASSERT
1310 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1311 if (has_receiver && check_null_and_abstract) {
1312 assert(receiver.not_null(), "should have thrown exception");
1313 Klass* receiver_klass = receiver->klass();
1314 Klass* rk = nullptr;
1315 if (attached_method.not_null()) {
1316 // In case there's resolved method attached, use its holder during the check.
1317 rk = attached_method->method_holder();
1318 } else {
1319 // Klass is already loaded.
1320 constantPoolHandle constants(current, caller->constants());
1321 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1322 }
1323 Klass* static_receiver_klass = rk;
1324 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1325 "actual receiver must be subclass of static receiver klass");
1326 if (receiver_klass->is_instance_klass()) {
1327 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1328 tty->print_cr("ERROR: Klass not yet initialized!!");
1329 receiver_klass->print();
1330 }
1331 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1332 }
1333 }
1334 #endif
1335
1336 return receiver;
1337 }
1338
1339 methodHandle SharedRuntime::find_callee_method(bool& caller_does_not_scalarize, TRAPS) {
1340 JavaThread* current = THREAD;
1341 ResourceMark rm(current);
1342 // We need first to check if any Java activations (compiled, interpreted)
1343 // exist on the stack since last JavaCall. If not, we need
1344 // to get the target method from the JavaCall wrapper.
1345 vframeStream vfst(current, true); // Do not skip any javaCalls
1346 methodHandle callee_method;
1347 if (vfst.at_end()) {
1348 // No Java frames were found on stack since we did the JavaCall.
1349 // Hence the stack can only contain an entry_frame. We need to
1350 // find the target method from the stub frame.
1351 RegisterMap reg_map(current,
1352 RegisterMap::UpdateMap::skip,
1353 RegisterMap::ProcessFrames::include,
1354 RegisterMap::WalkContinuation::skip);
1355 frame fr = current->last_frame();
1356 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1357 fr = fr.sender(®_map);
1358 assert(fr.is_entry_frame(), "must be");
1359 // fr is now pointing to the entry frame.
1360 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1361 } else {
1362 Bytecodes::Code bc;
1363 CallInfo callinfo;
1364 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1365 // Calls via mismatching methods are always non-scalarized
1366 if (callinfo.resolved_method()->mismatch()) {
1367 caller_does_not_scalarize = true;
1368 }
1369 callee_method = methodHandle(current, callinfo.selected_method());
1370 }
1371 assert(callee_method()->is_method(), "must be");
1372 return callee_method;
1373 }
1374
1375 // Resolves a call.
1376 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1377 JavaThread* current = THREAD;
1378 ResourceMark rm(current);
1379 RegisterMap cbl_map(current,
1380 RegisterMap::UpdateMap::skip,
1381 RegisterMap::ProcessFrames::include,
1382 RegisterMap::WalkContinuation::skip);
1383 frame caller_frame = current->last_frame().sender(&cbl_map);
1384
1385 CodeBlob* caller_cb = caller_frame.cb();
1386 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1387 nmethod* caller_nm = caller_cb->as_nmethod();
1388
1389 // determine call info & receiver
1390 // note: a) receiver is null for static calls
1391 // b) an exception is thrown if receiver is null for non-static calls
1392 CallInfo call_info;
1393 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1394 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1395
1396 NoSafepointVerifier nsv;
1397
1398 methodHandle callee_method(current, call_info.selected_method());
1399 // Calls via mismatching methods are always non-scalarized
1400 bool mismatch = is_optimized ? call_info.selected_method()->mismatch() : call_info.resolved_method()->mismatch();
1401 if (caller_nm->is_compiled_by_c1() || mismatch) {
1402 caller_does_not_scalarize = true;
1403 }
1404
1405 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1406 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1407 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1408 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1409 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1410
1411 assert(!caller_nm->is_unloading(), "It should not be unloading");
1412
1413 #ifndef PRODUCT
1414 // tracing/debugging/statistics
1415 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1416 (is_virtual) ? (&_resolve_virtual_ctr) :
1417 (&_resolve_static_ctr);
1418 AtomicAccess::inc(addr);
1419
1420 if (TraceCallFixup) {
1421 ResourceMark rm(current);
1422 tty->print("resolving %s%s (%s) %s call to",
1423 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1424 Bytecodes::name(invoke_code), (caller_does_not_scalarize) ? "non-scalar" : "");
1425 callee_method->print_short_name(tty);
1426 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1427 p2i(caller_frame.pc()), p2i(callee_method->code()));
1428 }
1429 #endif
1430
1431 if (invoke_code == Bytecodes::_invokestatic) {
1432 assert(callee_method->method_holder()->is_initialized() ||
1433 callee_method->method_holder()->is_reentrant_initialization(current),
1434 "invalid class initialization state for invoke_static");
1435 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1436 // In order to keep class initialization check, do not patch call
1437 // site for static call when the class is not fully initialized.
1438 // Proper check is enforced by call site re-resolution on every invocation.
1439 //
1440 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1441 // explicit class initialization check is put in nmethod entry (VEP).
1442 assert(callee_method->method_holder()->is_linked(), "must be");
1443 return callee_method;
1444 }
1445 }
1446
1447
1448 // JSR 292 key invariant:
1449 // If the resolved method is a MethodHandle invoke target, the call
1450 // site must be a MethodHandle call site, because the lambda form might tail-call
1451 // leaving the stack in a state unknown to either caller or callee
1452
1453 // Compute entry points. The computation of the entry points is independent of
1454 // patching the call.
1455
1456 // Make sure the callee nmethod does not get deoptimized and removed before
1457 // we are done patching the code.
1458
1459
1460 CompiledICLocker ml(caller_nm);
1461 if (is_virtual && !is_optimized) {
1462 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1463 inline_cache->update(&call_info, receiver->klass(), caller_does_not_scalarize);
1464 } else {
1465 // Callsite is a direct call - set it to the destination method
1466 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1467 callsite->set(callee_method, caller_does_not_scalarize);
1468 }
1469
1470 return callee_method;
1471 }
1472
1473 // Inline caches exist only in compiled code
1474 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1475 #ifdef ASSERT
1476 RegisterMap reg_map(current,
1477 RegisterMap::UpdateMap::skip,
1478 RegisterMap::ProcessFrames::include,
1479 RegisterMap::WalkContinuation::skip);
1480 frame stub_frame = current->last_frame();
1481 assert(stub_frame.is_runtime_frame(), "sanity check");
1482 frame caller_frame = stub_frame.sender(®_map);
1483 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1484 #endif /* ASSERT */
1485
1486 methodHandle callee_method;
1487 bool caller_does_not_scalarize = false;
1488 JRT_BLOCK
1489 callee_method = SharedRuntime::handle_ic_miss_helper(caller_does_not_scalarize, CHECK_NULL);
1490 // Return Method* through TLS
1491 current->set_vm_result_metadata(callee_method());
1492 JRT_BLOCK_END
1493 // return compiled code entry point after potential safepoints
1494 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1495 JRT_END
1496
1497
1498 // Handle call site that has been made non-entrant
1499 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1500 // 6243940 We might end up in here if the callee is deoptimized
1501 // as we race to call it. We don't want to take a safepoint if
1502 // the caller was interpreted because the caller frame will look
1503 // interpreted to the stack walkers and arguments are now
1504 // "compiled" so it is much better to make this transition
1505 // invisible to the stack walking code. The i2c path will
1506 // place the callee method in the callee_target. It is stashed
1507 // there because if we try and find the callee by normal means a
1508 // safepoint is possible and have trouble gc'ing the compiled args.
1509 RegisterMap reg_map(current,
1510 RegisterMap::UpdateMap::skip,
1511 RegisterMap::ProcessFrames::include,
1512 RegisterMap::WalkContinuation::skip);
1513 frame stub_frame = current->last_frame();
1514 assert(stub_frame.is_runtime_frame(), "sanity check");
1515 frame caller_frame = stub_frame.sender(®_map);
1516
1517 if (caller_frame.is_interpreted_frame() ||
1518 caller_frame.is_entry_frame() ||
1519 caller_frame.is_upcall_stub_frame()) {
1520 Method* callee = current->callee_target();
1521 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1522 current->set_vm_result_metadata(callee);
1523 current->set_callee_target(nullptr);
1524 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1525 // Bypass class initialization checks in c2i when caller is in native.
1526 // JNI calls to static methods don't have class initialization checks.
1527 // Fast class initialization checks are present in c2i adapters and call into
1528 // SharedRuntime::handle_wrong_method() on the slow path.
1529 //
1530 // JVM upcalls may land here as well, but there's a proper check present in
1531 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1532 // so bypassing it in c2i adapter is benign.
1533 return callee->get_c2i_no_clinit_check_entry();
1534 } else {
1535 if (caller_frame.is_interpreted_frame()) {
1536 return callee->get_c2i_inline_entry();
1537 } else {
1538 return callee->get_c2i_entry();
1539 }
1540 }
1541 }
1542
1543 // Must be compiled to compiled path which is safe to stackwalk
1544 methodHandle callee_method;
1545 bool is_static_call = false;
1546 bool is_optimized = false;
1547 bool caller_does_not_scalarize = false;
1548 JRT_BLOCK
1549 // Force resolving of caller (if we called from compiled frame)
1550 callee_method = SharedRuntime::reresolve_call_site(is_optimized, caller_does_not_scalarize, CHECK_NULL);
1551 current->set_vm_result_metadata(callee_method());
1552 JRT_BLOCK_END
1553 // return compiled code entry point after potential safepoints
1554 return get_resolved_entry(current, callee_method, callee_method->is_static(), is_optimized, caller_does_not_scalarize);
1555 JRT_END
1556
1557 // Handle abstract method call
1558 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1559 // Verbose error message for AbstractMethodError.
1560 // Get the called method from the invoke bytecode.
1561 vframeStream vfst(current, true);
1562 assert(!vfst.at_end(), "Java frame must exist");
1563 methodHandle caller(current, vfst.method());
1564 Bytecode_invoke invoke(caller, vfst.bci());
1565 DEBUG_ONLY( invoke.verify(); )
1566
1567 // Find the compiled caller frame.
1568 RegisterMap reg_map(current,
1569 RegisterMap::UpdateMap::include,
1570 RegisterMap::ProcessFrames::include,
1571 RegisterMap::WalkContinuation::skip);
1572 frame stubFrame = current->last_frame();
1573 assert(stubFrame.is_runtime_frame(), "must be");
1574 frame callerFrame = stubFrame.sender(®_map);
1575 assert(callerFrame.is_compiled_frame(), "must be");
1576
1577 // Install exception and return forward entry.
1578 address res = SharedRuntime::throw_AbstractMethodError_entry();
1579 JRT_BLOCK
1580 methodHandle callee(current, invoke.static_target(current));
1581 if (!callee.is_null()) {
1582 oop recv = callerFrame.retrieve_receiver(®_map);
1583 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1584 res = StubRoutines::forward_exception_entry();
1585 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1586 }
1587 JRT_BLOCK_END
1588 return res;
1589 JRT_END
1590
1591 // return verified_code_entry if interp_only_mode is not set for the current thread;
1592 // otherwise return c2i entry.
1593 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method,
1594 bool is_static_call, bool is_optimized, bool caller_does_not_scalarize) {
1595 bool is_interp_only_mode = (StressCallingConvention && (os::random() % (1 << 10)) == 0) || current->is_interp_only_mode();
1596 // In interp_only_mode we need to go to the interpreted entry
1597 // The c2i won't patch in this mode -- see fixup_callers_callsite
1598 bool go_to_interpreter = is_interp_only_mode && !callee_method->is_special_native_intrinsic();
1599
1600 if (caller_does_not_scalarize) {
1601 if (go_to_interpreter) {
1602 return callee_method->get_c2i_inline_entry();
1603 }
1604 assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
1605 return callee_method->verified_inline_code_entry();
1606 } else if (is_static_call || is_optimized) {
1607 if (go_to_interpreter) {
1608 return callee_method->get_c2i_entry();
1609 }
1610 assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
1611 return callee_method->verified_code_entry();
1612 } else {
1613 if (go_to_interpreter) {
1614 return callee_method->get_c2i_inline_ro_entry();
1615 }
1616 assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
1617 return callee_method->verified_inline_ro_code_entry();
1618 }
1619 }
1620
1621 // resolve a static call and patch code
1622 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1623 methodHandle callee_method;
1624 bool caller_does_not_scalarize = false;
1625 bool enter_special = false;
1626 JRT_BLOCK
1627 callee_method = SharedRuntime::resolve_helper(false, false, caller_does_not_scalarize, CHECK_NULL);
1628 current->set_vm_result_metadata(callee_method());
1629 JRT_BLOCK_END
1630 // return compiled code entry point after potential safepoints
1631 return get_resolved_entry(current, callee_method, true, false, caller_does_not_scalarize);
1632 JRT_END
1633
1634 // resolve virtual call and update inline cache to monomorphic
1635 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1636 methodHandle callee_method;
1637 bool caller_does_not_scalarize = false;
1638 JRT_BLOCK
1639 callee_method = SharedRuntime::resolve_helper(true, false, caller_does_not_scalarize, CHECK_NULL);
1640 current->set_vm_result_metadata(callee_method());
1641 JRT_BLOCK_END
1642 // return compiled code entry point after potential safepoints
1643 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1644 JRT_END
1645
1646
1647 // Resolve a virtual call that can be statically bound (e.g., always
1648 // monomorphic, so it has no inline cache). Patch code to resolved target.
1649 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1650 methodHandle callee_method;
1651 bool caller_does_not_scalarize = false;
1652 JRT_BLOCK
1653 callee_method = SharedRuntime::resolve_helper(true, true, caller_does_not_scalarize, CHECK_NULL);
1654 current->set_vm_result_metadata(callee_method());
1655 JRT_BLOCK_END
1656 // return compiled code entry point after potential safepoints
1657 return get_resolved_entry(current, callee_method, false, true, caller_does_not_scalarize);
1658 JRT_END
1659
1660 methodHandle SharedRuntime::handle_ic_miss_helper(bool& caller_does_not_scalarize, TRAPS) {
1661 JavaThread* current = THREAD;
1662 ResourceMark rm(current);
1663 CallInfo call_info;
1664 Bytecodes::Code bc;
1665
1666 // receiver is null for static calls. An exception is thrown for null
1667 // receivers for non-static calls
1668 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1669
1670 methodHandle callee_method(current, call_info.selected_method());
1671
1672 #ifndef PRODUCT
1673 AtomicAccess::inc(&_ic_miss_ctr);
1674
1675 // Statistics & Tracing
1676 if (TraceCallFixup) {
1677 ResourceMark rm(current);
1678 tty->print("IC miss (%s) %s call to", Bytecodes::name(bc), (caller_does_not_scalarize) ? "non-scalar" : "");
1679 callee_method->print_short_name(tty);
1680 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1681 }
1682
1683 if (ICMissHistogram) {
1684 MutexLocker m(VMStatistic_lock);
1685 RegisterMap reg_map(current,
1686 RegisterMap::UpdateMap::skip,
1687 RegisterMap::ProcessFrames::include,
1688 RegisterMap::WalkContinuation::skip);
1689 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1690 // produce statistics under the lock
1691 trace_ic_miss(f.pc());
1692 }
1693 #endif
1694
1695 // install an event collector so that when a vtable stub is created the
1696 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1697 // event can't be posted when the stub is created as locks are held
1698 // - instead the event will be deferred until the event collector goes
1699 // out of scope.
1700 JvmtiDynamicCodeEventCollector event_collector;
1701
1702 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1703 RegisterMap reg_map(current,
1704 RegisterMap::UpdateMap::skip,
1705 RegisterMap::ProcessFrames::include,
1706 RegisterMap::WalkContinuation::skip);
1707 frame caller_frame = current->last_frame().sender(®_map);
1708 CodeBlob* cb = caller_frame.cb();
1709 nmethod* caller_nm = cb->as_nmethod();
1710 // Calls via mismatching methods are always non-scalarized
1711 if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
1712 caller_does_not_scalarize = true;
1713 }
1714
1715 CompiledICLocker ml(caller_nm);
1716 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1717 inline_cache->update(&call_info, receiver()->klass(), caller_does_not_scalarize);
1718
1719 return callee_method;
1720 }
1721
1722 //
1723 // Resets a call-site in compiled code so it will get resolved again.
1724 // This routines handles both virtual call sites, optimized virtual call
1725 // sites, and static call sites. Typically used to change a call sites
1726 // destination from compiled to interpreted.
1727 //
1728 methodHandle SharedRuntime::reresolve_call_site(bool& is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1729 JavaThread* current = THREAD;
1730 ResourceMark rm(current);
1731 RegisterMap reg_map(current,
1732 RegisterMap::UpdateMap::skip,
1733 RegisterMap::ProcessFrames::include,
1734 RegisterMap::WalkContinuation::skip);
1735 frame stub_frame = current->last_frame();
1736 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1737 frame caller = stub_frame.sender(®_map);
1738 if (caller.is_compiled_frame()) {
1739 caller_does_not_scalarize = caller.cb()->as_nmethod()->is_compiled_by_c1();
1740 }
1741 assert(!caller.is_interpreted_frame(), "must be compiled");
1742
1743 // If the frame isn't a live compiled frame (i.e. deoptimized by the time we get here), no IC clearing must be done
1744 // for the caller. However, when the caller is C2 compiled and the callee a C1 or C2 compiled method, then we still
1745 // need to figure out whether it was an optimized virtual call with an inline type receiver. Otherwise, we end up
1746 // using the wrong method entry point and accidentally skip the buffering of the receiver.
1747 methodHandle callee_method = find_callee_method(caller_does_not_scalarize, CHECK_(methodHandle()));
1748 const bool caller_is_compiled_and_not_deoptimized = caller.is_compiled_frame() && !caller.is_deoptimized_frame();
1749 const bool caller_is_continuation_enter_intrinsic =
1750 caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic();
1751 const bool do_IC_clearing = caller_is_compiled_and_not_deoptimized || caller_is_continuation_enter_intrinsic;
1752
1753 const bool callee_compiled_with_scalarized_receiver = callee_method->has_compiled_code() &&
1754 !callee_method()->is_static() &&
1755 callee_method()->is_scalarized_arg(0);
1756 const bool compute_is_optimized = !caller_does_not_scalarize && callee_compiled_with_scalarized_receiver;
1757
1758 if (do_IC_clearing || compute_is_optimized) {
1759 address pc = caller.pc();
1760
1761 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1762 assert(caller_nm != nullptr, "did not find caller nmethod");
1763
1764 // Default call_addr is the location of the "basic" call.
1765 // Determine the address of the call we a reresolving. With
1766 // Inline Caches we will always find a recognizable call.
1767 // With Inline Caches disabled we may or may not find a
1768 // recognizable call. We will always find a call for static
1769 // calls and for optimized virtual calls. For vanilla virtual
1770 // calls it depends on the state of the UseInlineCaches switch.
1771 //
1772 // With Inline Caches disabled we can get here for a virtual call
1773 // for two reasons:
1774 // 1 - calling an abstract method. The vtable for abstract methods
1775 // will run us thru handle_wrong_method and we will eventually
1776 // end up in the interpreter to throw the ame.
1777 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1778 // call and between the time we fetch the entry address and
1779 // we jump to it the target gets deoptimized. Similar to 1
1780 // we will wind up in the interprter (thru a c2i with c2).
1781 //
1782 CompiledICLocker ml(caller_nm);
1783 address call_addr = caller_nm->call_instruction_address(pc);
1784
1785 if (call_addr != nullptr) {
1786 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1787 // bytes back in the instruction stream so we must also check for reloc info.
1788 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1789 bool ret = iter.next(); // Get item
1790 if (ret) {
1791 is_optimized = false;
1792 switch (iter.type()) {
1793 case relocInfo::static_call_type:
1794 assert(callee_method->is_static(), "must be");
1795 case relocInfo::opt_virtual_call_type: {
1796 is_optimized = (iter.type() == relocInfo::opt_virtual_call_type);
1797 if (do_IC_clearing) {
1798 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1799 cdc->set_to_clean();
1800 }
1801 break;
1802 }
1803
1804 case relocInfo::virtual_call_type: {
1805 if (do_IC_clearing) {
1806 // compiled, dispatched call (which used to call an interpreted method)
1807 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1808 inline_cache->set_to_clean();
1809 }
1810 break;
1811 }
1812 default:
1813 break;
1814 }
1815 }
1816 }
1817 }
1818
1819 #ifndef PRODUCT
1820 AtomicAccess::inc(&_wrong_method_ctr);
1821
1822 if (TraceCallFixup) {
1823 ResourceMark rm(current);
1824 tty->print("handle_wrong_method reresolving %s call to", (caller_does_not_scalarize) ? "non-scalar" : "");
1825 callee_method->print_short_name(tty);
1826 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1827 }
1828 #endif
1829
1830 return callee_method;
1831 }
1832
1833 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1834 // The faulting unsafe accesses should be changed to throw the error
1835 // synchronously instead. Meanwhile the faulting instruction will be
1836 // skipped over (effectively turning it into a no-op) and an
1837 // asynchronous exception will be raised which the thread will
1838 // handle at a later point. If the instruction is a load it will
1839 // return garbage.
1840
1841 // Request an async exception.
1842 thread->set_pending_unsafe_access_error();
1843
1844 // Return address of next instruction to execute.
2010 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
2011
2012 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
2013 if (message == nullptr) {
2014 // Shouldn't happen, but don't cause even more problems if it does
2015 message = const_cast<char*>(caster_klass->external_name());
2016 } else {
2017 jio_snprintf(message,
2018 msglen,
2019 "class %s cannot be cast to class %s (%s%s%s)",
2020 caster_name,
2021 target_name,
2022 caster_klass_description,
2023 klass_separator,
2024 target_klass_description
2025 );
2026 }
2027 return message;
2028 }
2029
2030 char* SharedRuntime::generate_identity_exception_message(JavaThread* current, Klass* klass) {
2031 assert(klass->is_inline_klass(), "Must be a concrete value class");
2032 const char* desc = "Cannot synchronize on an instance of value class ";
2033 const char* className = klass->external_name();
2034 size_t msglen = strlen(desc) + strlen(className) + 1;
2035 char* message = NEW_RESOURCE_ARRAY(char, msglen);
2036 if (nullptr == message) {
2037 // Out of memory: can't create detailed error message
2038 message = const_cast<char*>(klass->external_name());
2039 } else {
2040 jio_snprintf(message, msglen, "%s%s", desc, className);
2041 }
2042 return message;
2043 }
2044
2045 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
2046 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
2047 JRT_END
2048
2049 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
2050 if (!SafepointSynchronize::is_synchronizing()) {
2051 // Only try quick_enter() if we're not trying to reach a safepoint
2052 // so that the calling thread reaches the safepoint more quickly.
2053 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
2054 return;
2055 }
2056 }
2057 // NO_ASYNC required because an async exception on the state transition destructor
2058 // would leave you with the lock held and it would never be released.
2059 // The normal monitorenter NullPointerException is thrown without acquiring a lock
2060 // and the model is that an exception implies the method failed.
2061 JRT_BLOCK_NO_ASYNC
2062 Handle h_obj(THREAD, obj);
2063 ObjectSynchronizer::enter(h_obj, lock, current);
2064 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2258 tty->print_cr("Note 1: counter updates are not MT-safe.");
2259 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2260 tty->print_cr(" %% in nested categories are relative to their category");
2261 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2262 tty->cr();
2263
2264 MethodArityHistogram h;
2265 }
2266 #endif
2267
2268 #ifndef PRODUCT
2269 static int _lookups; // number of calls to lookup
2270 static int _equals; // number of buckets checked with matching hash
2271 static int _archived_hits; // number of successful lookups in archived table
2272 static int _runtime_hits; // number of successful lookups in runtime table
2273 #endif
2274
2275 // A simple wrapper class around the calling convention information
2276 // that allows sharing of adapters for the same calling convention.
2277 class AdapterFingerPrint : public MetaspaceObj {
2278 public:
2279 class Element {
2280 private:
2281 // The highest byte is the type of the argument. The remaining bytes contain the offset of the
2282 // field if it is flattened in the calling convention, -1 otherwise.
2283 juint _payload;
2284
2285 static constexpr int offset_bit_width = 24;
2286 static constexpr juint offset_bit_mask = (1 << offset_bit_width) - 1;
2287 public:
2288 Element(BasicType bt, int offset) : _payload((static_cast<juint>(bt) << offset_bit_width) | (juint(offset) & offset_bit_mask)) {
2289 assert(offset >= -1 && offset < jint(offset_bit_mask), "invalid offset %d", offset);
2290 }
2291
2292 BasicType bt() const {
2293 return static_cast<BasicType>(_payload >> offset_bit_width);
2294 }
2295
2296 int offset() const {
2297 juint res = _payload & offset_bit_mask;
2298 return res == offset_bit_mask ? -1 : res;
2299 }
2300
2301 juint hash() const {
2302 return _payload;
2303 }
2304
2305 bool operator!=(const Element& other) const {
2306 return _payload != other._payload;
2307 }
2308 };
2309
2310 private:
2311 const bool _has_ro_adapter;
2312 const int _length;
2313
2314 static int data_offset() { return sizeof(AdapterFingerPrint); }
2315 Element* data_pointer() {
2316 return reinterpret_cast<Element*>(reinterpret_cast<address>(this) + data_offset());
2317 }
2318
2319 const Element& element_at(int index) {
2320 assert(index < length(), "index %d out of bounds for length %d", index, length());
2321 Element* data = data_pointer();
2322 return data[index];
2323 }
2324
2325 // Private construtor. Use allocate() to get an instance.
2326 AdapterFingerPrint(const GrowableArray<SigEntry>* sig, bool has_ro_adapter)
2327 : _has_ro_adapter(has_ro_adapter), _length(total_args_passed_in_sig(sig)) {
2328 Element* data = data_pointer();
2329 BasicType prev_bt = T_ILLEGAL;
2330 int vt_count = 0;
2331 for (int index = 0; index < _length; index++) {
2332 const SigEntry& sig_entry = sig->at(index);
2333 BasicType bt = sig_entry._bt;
2334 if (bt == T_METADATA) {
2335 // Found start of inline type in signature
2336 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
2337 vt_count++;
2338 } else if (bt == T_VOID && prev_bt != T_LONG && prev_bt != T_DOUBLE) {
2339 // Found end of inline type in signature
2340 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
2341 vt_count--;
2342 assert(vt_count >= 0, "invalid vt_count");
2343 } else if (vt_count == 0) {
2344 // Widen fields that are not part of a scalarized inline type argument
2345 assert(sig_entry._offset == -1, "invalid offset for argument that is not a flattened field %d", sig_entry._offset);
2346 bt = adapter_encoding(bt);
2347 }
2348
2349 ::new(&data[index]) Element(bt, sig_entry._offset);
2350 prev_bt = bt;
2351 }
2352 assert(vt_count == 0, "invalid vt_count");
2353 }
2354
2355 // Call deallocate instead
2356 ~AdapterFingerPrint() {
2357 ShouldNotCallThis();
2358 }
2359
2360 static int total_args_passed_in_sig(const GrowableArray<SigEntry>* sig) {
2361 return (sig != nullptr) ? sig->length() : 0;
2362 }
2363
2364 static int compute_size_in_words(int len) {
2365 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(Element)));
2366 }
2367
2368 // Remap BasicTypes that are handled equivalently by the adapters.
2369 // These are correct for the current system but someday it might be
2370 // necessary to make this mapping platform dependent.
2371 static BasicType adapter_encoding(BasicType in) {
2372 switch (in) {
2373 case T_BOOLEAN:
2374 case T_BYTE:
2375 case T_SHORT:
2376 case T_CHAR:
2377 // They are all promoted to T_INT in the calling convention
2378 return T_INT;
2379
2380 case T_OBJECT:
2381 case T_ARRAY:
2382 // In other words, we assume that any register good enough for
2383 // an int or long is good enough for a managed pointer.
2384 #ifdef _LP64
2385 return T_LONG;
2386 #else
2387 return T_INT;
2388 #endif
2389
2390 case T_INT:
2391 case T_LONG:
2392 case T_FLOAT:
2393 case T_DOUBLE:
2394 case T_VOID:
2395 return in;
2396
2397 default:
2398 ShouldNotReachHere();
2399 return T_CONFLICT;
2400 }
2401 }
2402
2403 void* operator new(size_t size, size_t fp_size) throw() {
2404 assert(fp_size >= size, "sanity check");
2405 void* p = AllocateHeap(fp_size, mtCode);
2406 memset(p, 0, fp_size);
2407 return p;
2408 }
2409
2410 public:
2411 template<typename Function>
2412 void iterate_args(Function function) {
2413 for (int i = 0; i < length(); i++) {
2414 function(element_at(i));
2415 }
2416 }
2417
2418 static AdapterFingerPrint* allocate(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
2419 int len = total_args_passed_in_sig(sig);
2420 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2421 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(sig, has_ro_adapter);
2422 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2423 return afp;
2424 }
2425
2426 static void deallocate(AdapterFingerPrint* fp) {
2427 FreeHeap(fp);
2428 }
2429
2430 bool has_ro_adapter() const {
2431 return _has_ro_adapter;
2432 }
2433
2434 int length() const {
2435 return _length;
2436 }
2437
2438 unsigned int compute_hash() {
2439 int hash = 0;
2440 for (int i = 0; i < length(); i++) {
2441 const Element& v = element_at(i);
2442 //Add arithmetic operation to the hash, like +3 to improve hashing
2443 hash = ((hash << 8) ^ v.hash() ^ (hash >> 5)) + 3;
2444 }
2445 return (unsigned int)hash;
2446 }
2447
2448 const char* as_string() {
2449 stringStream st;
2450 st.print("{");
2451 if (_has_ro_adapter) {
2452 st.print("has_ro_adapter");
2453 } else {
2454 st.print("no_ro_adapter");
2455 }
2456 for (int i = 0; i < length(); i++) {
2457 st.print(", ");
2458 const Element& elem = element_at(i);
2459 st.print("{%s, %d}", type2name(elem.bt()), elem.offset());
2460 }
2461 st.print("}");
2462 return st.as_string();
2463 }
2464
2465 const char* as_basic_args_string() {
2466 stringStream st;
2467 bool long_prev = false;
2468 iterate_args([&] (const Element& arg) {
2469 if (long_prev) {
2470 long_prev = false;
2471 if (arg.bt() == T_VOID) {
2472 st.print("J");
2473 } else {
2474 st.print("L");
2475 }
2476 }
2477 if (arg.bt() == T_LONG) {
2478 long_prev = true;
2479 } else if (arg.bt() != T_VOID) {
2480 st.print("%c", type2char(arg.bt()));
2481 }
2482 });
2483 if (long_prev) {
2484 st.print("L");
2485 }
2486 return st.as_string();
2487 }
2488
2489 bool equals(AdapterFingerPrint* other) {
2490 if (other->_has_ro_adapter != _has_ro_adapter) {
2491 return false;
2492 } else if (other->_length != _length) {
2493 return false;
2494 } else {
2495 for (int i = 0; i < _length; i++) {
2496 if (element_at(i) != other->element_at(i)) {
2497 return false;
2498 }
2499 }
2500 }
2501 return true;
2502 }
2503
2504 // methods required by virtue of being a MetaspaceObj
2505 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2506 int size() const { return compute_size_in_words(_length); }
2507 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2508
2509 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2510 NOT_PRODUCT(_equals++);
2511 return fp1->equals(fp2);
2512 }
2513
2514 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2515 return fp->compute_hash();
2516 }
2519 #if INCLUDE_CDS
2520 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2521 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2522 }
2523
2524 class ArchivedAdapterTable : public OffsetCompactHashtable<
2525 AdapterFingerPrint*,
2526 AdapterHandlerEntry*,
2527 adapter_fp_equals_compact_hashtable_entry> {};
2528 #endif // INCLUDE_CDS
2529
2530 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2531 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2532 AnyObj::C_HEAP, mtCode,
2533 AdapterFingerPrint::compute_hash,
2534 AdapterFingerPrint::equals>;
2535 static AdapterHandlerTable* _adapter_handler_table;
2536 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2537
2538 // Find a entry with the same fingerprint if it exists
2539 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter) {
2540 NOT_PRODUCT(_lookups++);
2541 assert_lock_strong(AdapterHandlerLibrary_lock);
2542 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(sig, has_ro_adapter);
2543 AdapterHandlerEntry* entry = nullptr;
2544 #if INCLUDE_CDS
2545 // if we are building the archive then the archived adapter table is
2546 // not valid and we need to use the ones added to the runtime table
2547 if (AOTCodeCache::is_using_adapter()) {
2548 // Search archived table first. It is read-only table so can be searched without lock
2549 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2550 #ifndef PRODUCT
2551 if (entry != nullptr) {
2552 _archived_hits++;
2553 }
2554 #endif
2555 }
2556 #endif // INCLUDE_CDS
2557 if (entry == nullptr) {
2558 assert_lock_strong(AdapterHandlerLibrary_lock);
2559 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2560 if (entry_p != nullptr) {
2561 entry = *entry_p;
2562 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2579 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2580 ts.print(tty, "AdapterHandlerTable");
2581 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2582 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2583 int total_hits = _archived_hits + _runtime_hits;
2584 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2585 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2586 }
2587 #endif
2588
2589 // ---------------------------------------------------------------------------
2590 // Implementation of AdapterHandlerLibrary
2591 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2592 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2593 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2594 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2595 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2596 #if INCLUDE_CDS
2597 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2598 #endif // INCLUDE_CDS
2599 static const int AdapterHandlerLibrary_size = 48*K;
2600 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2601 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2602
2603 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2604 assert(_buffer != nullptr, "should be initialized");
2605 return _buffer;
2606 }
2607
2608 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2609 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2610 AdapterBlob* adapter_blob = entry->adapter_blob();
2611 char blob_id[256];
2612 jio_snprintf(blob_id,
2613 sizeof(blob_id),
2614 "%s(%s)",
2615 adapter_blob->name(),
2616 entry->fingerprint()->as_string());
2617 if (Forte::is_enabled()) {
2618 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2619 }
2627 void AdapterHandlerLibrary::initialize() {
2628 {
2629 ResourceMark rm;
2630 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2631 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2632 }
2633
2634 #if INCLUDE_CDS
2635 // Link adapters in AOT Cache to their code in AOT Code Cache
2636 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2637 link_aot_adapters();
2638 lookup_simple_adapters();
2639 return;
2640 }
2641 #endif // INCLUDE_CDS
2642
2643 ResourceMark rm;
2644 {
2645 MutexLocker mu(AdapterHandlerLibrary_lock);
2646
2647 CompiledEntrySignature no_args;
2648 no_args.compute_calling_conventions();
2649 _no_arg_handler = create_adapter(no_args, true);
2650
2651 CompiledEntrySignature obj_args;
2652 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
2653 obj_args.compute_calling_conventions();
2654 _obj_arg_handler = create_adapter(obj_args, true);
2655
2656 CompiledEntrySignature int_args;
2657 SigEntry::add_entry(int_args.sig(), T_INT);
2658 int_args.compute_calling_conventions();
2659 _int_arg_handler = create_adapter(int_args, true);
2660
2661 CompiledEntrySignature obj_int_args;
2662 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
2663 SigEntry::add_entry(obj_int_args.sig(), T_INT);
2664 obj_int_args.compute_calling_conventions();
2665 _obj_int_arg_handler = create_adapter(obj_int_args, true);
2666
2667 CompiledEntrySignature obj_obj_args;
2668 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2669 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2670 obj_obj_args.compute_calling_conventions();
2671 _obj_obj_arg_handler = create_adapter(obj_obj_args, true);
2672
2673 // we should always get an entry back but we don't have any
2674 // associated blob on Zero
2675 assert(_no_arg_handler != nullptr &&
2676 _obj_arg_handler != nullptr &&
2677 _int_arg_handler != nullptr &&
2678 _obj_int_arg_handler != nullptr &&
2679 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2680 }
2681
2682 // Outside of the lock
2683 #ifndef ZERO
2684 // no blobs to register when we are on Zero
2685 post_adapter_creation(_no_arg_handler);
2686 post_adapter_creation(_obj_arg_handler);
2687 post_adapter_creation(_int_arg_handler);
2688 post_adapter_creation(_obj_int_arg_handler);
2689 post_adapter_creation(_obj_obj_arg_handler);
2690 #endif // ZERO
2691 }
2692
2693 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2694 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2695 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2696 return AdapterHandlerEntry::allocate(id, fingerprint);
2697 }
2698
2699 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2700 int total_args_passed = method->size_of_parameters(); // All args on stack
2701 if (total_args_passed == 0) {
2702 return _no_arg_handler;
2703 } else if (total_args_passed == 1) {
2704 if (!method->is_static()) {
2705 if (InlineTypePassFieldsAsArgs && method->method_holder()->is_inline_klass()) {
2706 return nullptr;
2707 }
2708 return _obj_arg_handler;
2709 }
2710 switch (method->signature()->char_at(1)) {
2711 case JVM_SIGNATURE_CLASS: {
2712 if (InlineTypePassFieldsAsArgs) {
2713 SignatureStream ss(method->signature());
2714 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2715 if (vk != nullptr) {
2716 return nullptr;
2717 }
2718 }
2719 return _obj_arg_handler;
2720 }
2721 case JVM_SIGNATURE_ARRAY:
2722 return _obj_arg_handler;
2723 case JVM_SIGNATURE_INT:
2724 case JVM_SIGNATURE_BOOLEAN:
2725 case JVM_SIGNATURE_CHAR:
2726 case JVM_SIGNATURE_BYTE:
2727 case JVM_SIGNATURE_SHORT:
2728 return _int_arg_handler;
2729 }
2730 } else if (total_args_passed == 2 &&
2731 !method->is_static() && (!InlineTypePassFieldsAsArgs || !method->method_holder()->is_inline_klass())) {
2732 switch (method->signature()->char_at(1)) {
2733 case JVM_SIGNATURE_CLASS: {
2734 if (InlineTypePassFieldsAsArgs) {
2735 SignatureStream ss(method->signature());
2736 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2737 if (vk != nullptr) {
2738 return nullptr;
2739 }
2740 }
2741 return _obj_obj_arg_handler;
2742 }
2743 case JVM_SIGNATURE_ARRAY:
2744 return _obj_obj_arg_handler;
2745 case JVM_SIGNATURE_INT:
2746 case JVM_SIGNATURE_BOOLEAN:
2747 case JVM_SIGNATURE_CHAR:
2748 case JVM_SIGNATURE_BYTE:
2749 case JVM_SIGNATURE_SHORT:
2750 return _obj_int_arg_handler;
2751 }
2752 }
2753 return nullptr;
2754 }
2755
2756 CompiledEntrySignature::CompiledEntrySignature(Method* method) :
2757 _method(method), _num_inline_args(0), _has_inline_recv(false),
2758 _regs(nullptr), _regs_cc(nullptr), _regs_cc_ro(nullptr),
2759 _args_on_stack(0), _args_on_stack_cc(0), _args_on_stack_cc_ro(0),
2760 _c1_needs_stack_repair(false), _c2_needs_stack_repair(false), _supers(nullptr) {
2761 _sig = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2762 _sig_cc = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2763 _sig_cc_ro = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2764 }
2765
2766 // See if we can save space by sharing the same entry for VIEP and VIEP(RO),
2767 // or the same entry for VEP and VIEP(RO).
2768 CodeOffsets::Entries CompiledEntrySignature::c1_inline_ro_entry_type() const {
2769 if (!has_scalarized_args()) {
2770 // VEP/VIEP/VIEP(RO) all share the same entry. There's no packing.
2771 return CodeOffsets::Verified_Entry;
2772 }
2773 if (_method->is_static()) {
2774 // Static methods don't need VIEP(RO)
2775 return CodeOffsets::Verified_Entry;
2776 }
2777
2778 if (has_inline_recv()) {
2779 if (num_inline_args() == 1) {
2780 // Share same entry for VIEP and VIEP(RO).
2781 // This is quite common: we have an instance method in an InlineKlass that has
2782 // no inline type args other than <this>.
2783 return CodeOffsets::Verified_Inline_Entry;
2784 } else {
2785 assert(num_inline_args() > 1, "must be");
2786 // No sharing:
2787 // VIEP(RO) -- <this> is passed as object
2788 // VEP -- <this> is passed as fields
2789 return CodeOffsets::Verified_Inline_Entry_RO;
2790 }
2791 }
2792
2793 // Either a static method, or <this> is not an inline type
2794 if (args_on_stack_cc() != args_on_stack_cc_ro()) {
2795 // No sharing:
2796 // Some arguments are passed on the stack, and we have inserted reserved entries
2797 // into the VEP, but we never insert reserved entries into the VIEP(RO).
2798 return CodeOffsets::Verified_Inline_Entry_RO;
2799 } else {
2800 // Share same entry for VEP and VIEP(RO).
2801 return CodeOffsets::Verified_Entry;
2802 }
2803 }
2804
2805 // Returns all super methods (transitive) in classes and interfaces that are overridden by the current method.
2806 GrowableArray<Method*>* CompiledEntrySignature::get_supers() {
2807 if (_supers != nullptr) {
2808 return _supers;
2809 }
2810 _supers = new GrowableArray<Method*>();
2811 // Skip private, static, and <init> methods
2812 if (_method->is_private() || _method->is_static() || _method->is_object_constructor()) {
2813 return _supers;
2814 }
2815 Symbol* name = _method->name();
2816 Symbol* signature = _method->signature();
2817 const Klass* holder = _method->method_holder()->super();
2818 Symbol* holder_name = holder->name();
2819 JavaThread* current = JavaThread::current();
2820 HandleMark hm(current);
2821 Handle loader(current, _method->method_holder()->class_loader());
2822
2823 // Walk up the class hierarchy and search for super methods
2824 while (holder != nullptr) {
2825 Method* super_method = holder->lookup_method(name, signature);
2826 if (super_method == nullptr) {
2827 break;
2828 }
2829 if (!super_method->is_static() && !super_method->is_private() &&
2830 (!super_method->is_package_private() ||
2831 super_method->method_holder()->is_same_class_package(loader(), holder_name))) {
2832 _supers->push(super_method);
2833 }
2834 holder = super_method->method_holder()->super();
2835 }
2836 // Search interfaces for super methods
2837 Array<InstanceKlass*>* interfaces = _method->method_holder()->transitive_interfaces();
2838 for (int i = 0; i < interfaces->length(); ++i) {
2839 Method* m = interfaces->at(i)->lookup_method(name, signature);
2840 if (m != nullptr && !m->is_static() && m->is_public()) {
2841 _supers->push(m);
2842 }
2843 }
2844 return _supers;
2845 }
2846
2847 bool CompiledEntrySignature::check_supers_and_deoptimize(int arg_num) {
2848 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must be in vm state");
2849
2850 bool scalar_super = false;
2851 bool non_scalar_super = false;
2852
2853 GrowableArray<Method*>* supers = get_supers();
2854 for (int i = 0; i < supers->length(); ++i) {
2855 Method* super_method = supers->at(i);
2856 if (super_method->is_scalarized_arg(arg_num)) {
2857 scalar_super = true;
2858 } else {
2859 non_scalar_super = true;
2860 }
2861 }
2862 #ifdef ASSERT
2863 // Randomly enable below code paths for stress testing
2864 bool stress = StressCallingConvention;
2865 if (stress && (os::random() & 1) == 1) {
2866 non_scalar_super = true;
2867 if ((os::random() & 1) == 1) {
2868 scalar_super = true;
2869 }
2870 }
2871 #endif
2872 if (non_scalar_super) {
2873 // Found a super method with a non-scalarized argument. Fall back to the non-scalarized calling convention.
2874 if (scalar_super) {
2875 // Found non-scalar *and* scalar super methods. We can't handle both.
2876 // Mark the scalar method as mismatch and re-compile call sites to use non-scalarized calling convention.
2877 for (int i = 0; i < supers->length(); ++i) {
2878 Method* super_method = supers->at(i);
2879 if (super_method->is_scalarized_arg(arg_num) DEBUG_ONLY(|| (stress && (os::random() & 1) == 1))) {
2880 JavaThread* thread = JavaThread::current();
2881 HandleMark hm(thread);
2882 methodHandle mh(thread, super_method);
2883 DeoptimizationScope deopt_scope;
2884 {
2885 // Keep the lock scope minimal. Prevent interference with other
2886 // dependency checks by setting mismatch and marking within the lock.
2887 MutexLocker ml(Compile_lock, Mutex::_safepoint_check_flag);
2888 super_method->set_mismatch();
2889 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
2890 }
2891 deopt_scope.deoptimize_marked();
2892 }
2893 }
2894 }
2895 }
2896
2897 return non_scalar_super;
2898 }
2899
2900 // Iterate over arguments and compute scalarized and non-scalarized signatures
2901 void CompiledEntrySignature::compute_calling_conventions(bool link_time) {
2902 assert(JavaThread::current()->thread_state() != _thread_in_native, "must not be in native");
2903 assert(link_time || (_method != nullptr && _method->adapter() != nullptr), "invariant");
2904 bool has_scalarized = false;
2905 if (_method != nullptr) {
2906 InstanceKlass* holder = _method->method_holder();
2907 int arg_num = 0;
2908 if (!_method->is_static()) {
2909 // We shouldn't scalarize 'this' in a value class constructor
2910 if (holder->is_inline_klass() && InlineKlass::cast(holder)->can_be_passed_as_fields() &&
2911 !_method->is_object_constructor() && (link_time || _method->is_scalarized_arg(arg_num))) {
2912 _sig_cc->appendAll(InlineKlass::cast(holder)->extended_sig());
2913 _sig_cc->insert_before(1, SigEntry(T_OBJECT, 0, nullptr, false, true)); // buffer argument
2914 has_scalarized = true;
2915 _has_inline_recv = true;
2916 _num_inline_args++;
2917 } else {
2918 SigEntry::add_entry(_sig_cc, T_OBJECT, holder->name());
2919 }
2920 SigEntry::add_entry(_sig, T_OBJECT, holder->name());
2921 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, holder->name());
2922 arg_num++;
2923 }
2924 for (SignatureStream ss(_method->signature()); !ss.at_return_type(); ss.next()) {
2925 const BasicType bt = ss.type();
2926 if (InlineTypePassFieldsAsArgs && bt == T_OBJECT) {
2927 InlineKlass* vk = ss.as_inline_klass(holder);
2928 if (vk != nullptr && vk->can_be_passed_as_fields() && (link_time || _method->is_scalarized_arg(arg_num))) {
2929 // Check for a calling convention mismatch with super method(s)
2930 if (link_time && check_supers_and_deoptimize(arg_num)) {
2931 // Fall back to non-scalarized calling convention
2932 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2933 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2934 } else {
2935 _num_inline_args++;
2936 has_scalarized = true;
2937 int last = _sig_cc->length();
2938 int last_ro = _sig_cc_ro->length();
2939 _sig_cc->appendAll(vk->extended_sig());
2940 _sig_cc_ro->appendAll(vk->extended_sig());
2941 // buffer argument
2942 _sig_cc->insert_before(last + 1, SigEntry(T_OBJECT, 0, nullptr, false, true));
2943 _sig_cc_ro->insert_before(last_ro + 1, SigEntry(T_OBJECT, 0, nullptr, false, true));
2944 // Insert InlineTypeNode::NullMarker field right after T_METADATA delimiter
2945 _sig_cc->insert_before(last + 2, SigEntry(T_BOOLEAN, -1, nullptr, true, false));
2946 _sig_cc_ro->insert_before(last_ro + 2, SigEntry(T_BOOLEAN, -1, nullptr, true, false));
2947 }
2948 } else {
2949 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2950 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2951 }
2952 } else {
2953 SigEntry::add_entry(_sig_cc, ss.type(), ss.as_symbol());
2954 SigEntry::add_entry(_sig_cc_ro, ss.type(), ss.as_symbol());
2955 }
2956 SigEntry::add_entry(_sig, bt, ss.as_symbol());
2957 if (bt != T_VOID) {
2958 arg_num++;
2959 }
2960 }
2961 }
2962
2963 // Compute the non-scalarized calling convention
2964 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
2965 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
2966
2967 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
2968 if (has_scalarized && !_method->is_native()) {
2969 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
2970 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
2971
2972 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
2973 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
2974
2975 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
2976 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
2977
2978 // Upper bound on stack arguments to avoid hitting the argument limit and
2979 // bailing out of compilation ("unsupported incoming calling sequence").
2980 // TODO 8281260 We need a reasonable limit (flag?) here
2981 if (MAX2(_args_on_stack_cc, _args_on_stack_cc_ro) <= 75) {
2982 return; // Success
2983 }
2984 }
2985
2986 // No scalarized args
2987 _sig_cc = _sig;
2988 _regs_cc = _regs;
2989 _args_on_stack_cc = _args_on_stack;
2990
2991 _sig_cc_ro = _sig;
2992 _regs_cc_ro = _regs;
2993 _args_on_stack_cc_ro = _args_on_stack;
2994 }
2995
2996 void CompiledEntrySignature::initialize_from_fingerprint(AdapterFingerPrint* fingerprint) {
2997 _has_inline_recv = fingerprint->has_ro_adapter();
2998
2999 int value_object_count = 0;
3000 BasicType prev_bt = T_ILLEGAL;
3001 bool has_scalarized_arguments = false;
3002 bool long_prev = false;
3003 int long_prev_offset = -1;
3004 bool skipping_inline_recv = false;
3005 bool receiver_handled = false;
3006
3007 fingerprint->iterate_args([&] (const AdapterFingerPrint::Element& arg) {
3008 BasicType bt = arg.bt();
3009 int offset = arg.offset();
3010
3011 if (long_prev) {
3012 long_prev = false;
3013 BasicType bt_to_add;
3014 if (bt == T_VOID) {
3015 bt_to_add = T_LONG;
3016 } else {
3017 bt_to_add = T_OBJECT;
3018 }
3019 if (value_object_count == 0) {
3020 SigEntry::add_entry(_sig, bt_to_add);
3021 }
3022 assert(long_prev_offset != 0, "no buffer argument here");
3023 SigEntry::add_entry(_sig_cc, bt_to_add, nullptr, long_prev_offset);
3024 if (!skipping_inline_recv) {
3025 SigEntry::add_entry(_sig_cc_ro, bt_to_add, nullptr, long_prev_offset);
3026 }
3027 }
3028
3029 switch (bt) {
3030 case T_VOID:
3031 if (prev_bt != T_LONG && prev_bt != T_DOUBLE) {
3032 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
3033 value_object_count--;
3034 SigEntry::add_entry(_sig_cc, T_VOID, nullptr, offset);
3035 if (!skipping_inline_recv) {
3036 SigEntry::add_entry(_sig_cc_ro, T_VOID, nullptr, offset);
3037 } else if (value_object_count == 0) {
3038 skipping_inline_recv = false;
3039 }
3040 assert(value_object_count >= 0, "invalid value object count");
3041 } else {
3042 // Nothing to add for _sig: We already added an addition T_VOID in add_entry() when adding T_LONG or T_DOUBLE.
3043 }
3044 break;
3045 case T_INT:
3046 case T_FLOAT:
3047 case T_DOUBLE:
3048 if (value_object_count == 0) {
3049 SigEntry::add_entry(_sig, bt);
3050 }
3051 SigEntry::add_entry(_sig_cc, bt, nullptr, offset);
3052 if (!skipping_inline_recv) {
3053 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset);
3054 }
3055 break;
3056 case T_LONG:
3057 long_prev = true;
3058 long_prev_offset = offset;
3059 break;
3060 case T_BOOLEAN:
3061 case T_CHAR:
3062 case T_BYTE:
3063 case T_SHORT:
3064 case T_OBJECT:
3065 case T_ARRAY:
3066 assert(value_object_count > 0, "must be value object field");
3067 assert(offset != 0 || (bt == T_OBJECT && prev_bt == T_METADATA), "buffer input expected here");
3068 SigEntry::add_entry(_sig_cc, bt, nullptr, offset, offset == -1, offset == 0);
3069 if (!skipping_inline_recv) {
3070 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset, offset == -1, offset == 0);
3071 }
3072 break;
3073 case T_METADATA:
3074 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
3075 if (value_object_count == 0) {
3076 SigEntry::add_entry(_sig, T_OBJECT);
3077 }
3078 SigEntry::add_entry(_sig_cc, T_METADATA, nullptr, offset);
3079 if (!skipping_inline_recv) {
3080 if (!receiver_handled && _has_inline_recv && value_object_count == 0) {
3081 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3082 skipping_inline_recv = true;
3083 receiver_handled = true;
3084 } else {
3085 SigEntry::add_entry(_sig_cc_ro, T_METADATA, nullptr, offset);
3086 }
3087 }
3088 value_object_count++;
3089 has_scalarized_arguments = true;
3090 break;
3091 default: {
3092 fatal("Unexpected BasicType: %s", basictype_to_str(bt));
3093 }
3094 }
3095 prev_bt = bt;
3096 });
3097
3098 if (long_prev) {
3099 // If previous bt was T_LONG and we reached the end of the signature, we know that it must be a T_OBJECT.
3100 SigEntry::add_entry(_sig, T_OBJECT);
3101 SigEntry::add_entry(_sig_cc, T_OBJECT);
3102 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3103 }
3104 assert(value_object_count == 0, "invalid value object count");
3105
3106 #ifdef ASSERT
3107 if (_has_inline_recv) {
3108 // In RO signatures, inline receivers must be represented as a single T_OBJECT
3109 assert(_sig_cc_ro->length() >= 1, "sig_cc_ro must include receiver");
3110 assert(_sig_cc_ro->at(0)._bt == T_OBJECT,
3111 "sig_cc_ro must represent inline receiver as T_OBJECT");
3112 assert(_sig_cc_ro->length() <= _sig_cc->length(),
3113 "sig_cc_ro must not be longer than sig_cc");
3114 }
3115 #endif
3116
3117 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
3118 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
3119
3120 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3121 if (has_scalarized_arguments) {
3122 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3123 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3124
3125 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3126 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3127
3128 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3129 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3130 } else {
3131 // No scalarized args
3132 _sig_cc = _sig;
3133 _regs_cc = _regs;
3134 _args_on_stack_cc = _args_on_stack;
3135
3136 _sig_cc_ro = _sig;
3137 _regs_cc_ro = _regs;
3138 _args_on_stack_cc_ro = _args_on_stack;
3139 }
3140
3141 #ifdef ASSERT
3142 {
3143 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(_sig_cc, _has_inline_recv);
3144 assert(fingerprint->equals(compare_fp), "%s - %s", fingerprint->as_string(), compare_fp->as_string());
3145 AdapterFingerPrint::deallocate(compare_fp);
3146 }
3147 #endif
3148 }
3149
3150 const char* AdapterHandlerEntry::_entry_names[] = {
3151 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
3152 };
3153
3154 #ifdef ASSERT
3155 void AdapterHandlerLibrary::verify_adapter_sharing(CompiledEntrySignature& ces, AdapterHandlerEntry* cached_entry) {
3156 // we can only check for the same code if there is any
3157 #ifndef ZERO
3158 AdapterHandlerEntry* comparison_entry = create_adapter(ces, false, true);
3159 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
3160 assert(comparison_entry->compare_code(cached_entry), "code must match");
3161 // Release the one just created
3162 AdapterHandlerEntry::deallocate(comparison_entry);
3163 # endif // ZERO
3164 }
3165 #endif /* ASSERT*/
3166
3167 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
3168 assert(!method->is_abstract() || InlineTypePassFieldsAsArgs, "abstract methods do not have adapters");
3169 // Use customized signature handler. Need to lock around updates to
3170 // the _adapter_handler_table (it is not safe for concurrent readers
3171 // and a single writer: this could be fixed if it becomes a
3172 // problem).
3173
3174 // Fast-path for trivial adapters
3175 AdapterHandlerEntry* entry = get_simple_adapter(method);
3176 if (entry != nullptr) {
3177 return entry;
3178 }
3179
3180 ResourceMark rm;
3181 bool new_entry = false;
3182
3183 CompiledEntrySignature ces(method());
3184 ces.compute_calling_conventions();
3185 if (ces.has_scalarized_args()) {
3186 if (!method->has_scalarized_args()) {
3187 method->set_has_scalarized_args();
3188 }
3189 if (ces.c1_needs_stack_repair()) {
3190 method->set_c1_needs_stack_repair();
3191 }
3192 if (ces.c2_needs_stack_repair() && !method->c2_needs_stack_repair()) {
3193 method->set_c2_needs_stack_repair();
3194 }
3195 }
3196
3197 {
3198 MutexLocker mu(AdapterHandlerLibrary_lock);
3199
3200 // Lookup method signature's fingerprint
3201 entry = lookup(ces.sig_cc(), ces.has_inline_recv());
3202
3203 if (entry != nullptr) {
3204 #ifndef ZERO
3205 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
3206 #endif
3207 #ifdef ASSERT
3208 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
3209 verify_adapter_sharing(ces, entry);
3210 }
3211 #endif
3212 } else {
3213 entry = create_adapter(ces, /* allocate_code_blob */ true);
3214 if (entry != nullptr) {
3215 new_entry = true;
3216 }
3217 }
3218 }
3219
3220 // Outside of the lock
3221 if (new_entry) {
3222 post_adapter_creation(entry);
3223 }
3224 return entry;
3225 }
3226
3227 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
3228 ResourceMark rm;
3229 const char* name = AdapterHandlerLibrary::name(handler);
3230 const uint32_t id = AdapterHandlerLibrary::id(handler);
3231
3232 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
3233 if (blob != nullptr) {
3248 }
3249 insts_size = adapter_blob->code_size();
3250 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
3251 handler->fingerprint()->as_basic_args_string(),
3252 handler->fingerprint()->as_string(), insts_size);
3253 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
3254 if (Verbose || PrintStubCode) {
3255 address first_pc = adapter_blob->content_begin();
3256 if (first_pc != nullptr) {
3257 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
3258 st->cr();
3259 }
3260 }
3261 }
3262 #endif // PRODUCT
3263
3264 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
3265 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
3266 entry_offset[AdapterBlob::I2C] = 0;
3267 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
3268 entry_offset[AdapterBlob::C2I_Inline] = entry_address[AdapterBlob::C2I_Inline] - entry_address[AdapterBlob::I2C];
3269 entry_offset[AdapterBlob::C2I_Inline_RO] = entry_address[AdapterBlob::C2I_Inline_RO] - entry_address[AdapterBlob::I2C];
3270 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
3271 entry_offset[AdapterBlob::C2I_Unverified_Inline] = entry_address[AdapterBlob::C2I_Unverified_Inline] - entry_address[AdapterBlob::I2C];
3272 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
3273 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
3274 } else {
3275 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
3276 }
3277 }
3278
3279 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
3280 CompiledEntrySignature& ces,
3281 bool allocate_code_blob,
3282 bool is_transient) {
3283 if (log_is_enabled(Info, perf, class, link)) {
3284 ClassLoader::perf_method_adapters_count()->inc();
3285 }
3286
3287 #ifndef ZERO
3288 AdapterBlob* adapter_blob = nullptr;
3289 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
3290 CodeBuffer buffer(buf);
3291 short buffer_locs[20];
3292 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
3293 sizeof(buffer_locs)/sizeof(relocInfo));
3294 MacroAssembler masm(&buffer);
3295 address entry_address[AdapterBlob::ENTRY_COUNT];
3296
3297 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
3298 SharedRuntime::generate_i2c2i_adapters(&masm,
3299 ces.args_on_stack(),
3300 ces.sig(),
3301 ces.regs(),
3302 ces.sig_cc(),
3303 ces.regs_cc(),
3304 ces.sig_cc_ro(),
3305 ces.regs_cc_ro(),
3306 entry_address,
3307 adapter_blob,
3308 allocate_code_blob);
3309
3310 if (ces.has_scalarized_args()) {
3311 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3312 GrowableArray<SigEntry>* heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtCode);
3313 heap_sig->appendAll(ces.sig_cc());
3314 handler->set_sig_cc(heap_sig);
3315 heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtCode);
3316 heap_sig->appendAll(ces.sig_cc_ro());
3317 handler->set_sig_cc_ro(heap_sig);
3318 }
3319 // On zero there is no code to save and no need to create a blob and
3320 // or relocate the handler.
3321 int entry_offset[AdapterBlob::ENTRY_COUNT];
3322 address_to_offset(entry_address, entry_offset);
3323 #ifdef ASSERT
3324 if (VerifyAdapterSharing) {
3325 handler->save_code(buf->code_begin(), buffer.insts_size());
3326 if (is_transient) {
3327 return true;
3328 }
3329 }
3330 #endif
3331 if (adapter_blob == nullptr) {
3332 // CodeCache is full, disable compilation
3333 // Ought to log this but compile log is only per compile thread
3334 // and we're some non descript Java thread.
3335 return false;
3336 }
3337 handler->set_adapter_blob(adapter_blob);
3338 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
3339 // try to save generated code
3340 const char* name = AdapterHandlerLibrary::name(handler);
3341 const uint32_t id = AdapterHandlerLibrary::id(handler);
3342 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
3343 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
3344 }
3345 #endif // ZERO
3346
3347 #ifndef PRODUCT
3348 // debugging support
3349 if (PrintAdapterHandlers || PrintStubCode) {
3350 print_adapter_handler_info(tty, handler);
3351 }
3352 #endif
3353
3354 return true;
3355 }
3356
3357 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(CompiledEntrySignature& ces,
3358 bool allocate_code_blob,
3359 bool is_transient) {
3360 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(ces.sig_cc(), ces.has_inline_recv());
3361 #ifdef ASSERT
3362 // Verify that we can successfully restore the compiled entry signature object.
3363 CompiledEntrySignature ces_verify;
3364 ces_verify.initialize_from_fingerprint(fp);
3365 #endif
3366 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
3367 if (!generate_adapter_code(handler, ces, allocate_code_blob, is_transient)) {
3368 AdapterHandlerEntry::deallocate(handler);
3369 return nullptr;
3370 }
3371 if (!is_transient) {
3372 assert_lock_strong(AdapterHandlerLibrary_lock);
3373 _adapter_handler_table->put(fp, handler);
3374 }
3375 return handler;
3376 }
3377
3378 #if INCLUDE_CDS
3379 void AdapterHandlerEntry::remove_unshareable_info() {
3380 #ifdef ASSERT
3381 _saved_code = nullptr;
3382 _saved_code_length = 0;
3383 #endif // ASSERT
3384 _adapter_blob = nullptr;
3385 _linked = false;
3386 _sig_cc = nullptr;
3387 _sig_cc_ro = nullptr;
3388 }
3389
3390 class CopyAdapterTableToArchive : StackObj {
3391 private:
3392 CompactHashtableWriter* _writer;
3393 ArchiveBuilder* _builder;
3394 public:
3395 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
3396 _builder(ArchiveBuilder::current())
3397 {}
3398
3399 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
3400 LogStreamHandle(Trace, aot) lsh;
3401 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
3402 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
3403 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
3404 assert(buffered_fp != nullptr,"sanity check");
3405 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
3406 assert(buffered_entry != nullptr,"sanity check");
3407
3447 }
3448 #endif
3449 }
3450
3451 // This method is used during production run to link archived adapters (stored in AOT Cache)
3452 // to their code in AOT Code Cache
3453 void AdapterHandlerEntry::link() {
3454 ResourceMark rm;
3455 assert(_fingerprint != nullptr, "_fingerprint must not be null");
3456 bool generate_code = false;
3457 // Generate code only if AOTCodeCache is not available, or
3458 // caching adapters is disabled, or we fail to link
3459 // the AdapterHandlerEntry to its code in the AOTCodeCache
3460 if (AOTCodeCache::is_using_adapter()) {
3461 AdapterHandlerLibrary::link_aot_adapter_handler(this);
3462 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
3463 if (_adapter_blob == nullptr) {
3464 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
3465 generate_code = true;
3466 }
3467
3468 if (get_sig_cc() == nullptr) {
3469 // Calling conventions have to be regenerated at runtime and are accessed through method adapters,
3470 // which are archived in the AOT code cache. If the adapters are not regenerated, the
3471 // calling conventions should be regenerated here.
3472 CompiledEntrySignature ces;
3473 ces.initialize_from_fingerprint(_fingerprint);
3474 if (ces.has_scalarized_args()) {
3475 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3476 GrowableArray<SigEntry>* heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtCode);
3477 heap_sig->appendAll(ces.sig_cc());
3478 set_sig_cc(heap_sig);
3479 heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtCode);
3480 heap_sig->appendAll(ces.sig_cc_ro());
3481 set_sig_cc_ro(heap_sig);
3482 }
3483 }
3484 } else {
3485 generate_code = true;
3486 }
3487 if (generate_code) {
3488 CompiledEntrySignature ces;
3489 ces.initialize_from_fingerprint(_fingerprint);
3490 if (!AdapterHandlerLibrary::generate_adapter_code(this, ces, true, false)) {
3491 // Don't throw exceptions during VM initialization because java.lang.* classes
3492 // might not have been initialized, causing problems when constructing the
3493 // Java exception object.
3494 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3495 }
3496 }
3497 if (_adapter_blob != nullptr) {
3498 post_adapter_creation(this);
3499 }
3500 assert(_linked, "AdapterHandlerEntry must now be linked");
3501 }
3502
3503 void AdapterHandlerLibrary::link_aot_adapters() {
3504 uint max_id = 0;
3505 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3506 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
3507 * That implies adapter ids of the adapters in the cache may not be contiguous.
3508 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
3509 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
3510 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
3511 */
3512 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
3513 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3514 entry->link();
3515 max_id = MAX2(max_id, entry->id());
3516 });
3517 // Set adapter id to the maximum id found in the AOTCache
3518 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
3519 _id_counter = max_id;
3520 }
3521
3522 // This method is called during production run to lookup simple adapters
3523 // in the archived adapter handler table
3524 void AdapterHandlerLibrary::lookup_simple_adapters() {
3525 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3526
3527 MutexLocker mu(AdapterHandlerLibrary_lock);
3528 ResourceMark rm;
3529 CompiledEntrySignature no_args;
3530 no_args.compute_calling_conventions();
3531 _no_arg_handler = lookup(no_args.sig_cc(), no_args.has_inline_recv());
3532
3533 CompiledEntrySignature obj_args;
3534 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
3535 obj_args.compute_calling_conventions();
3536 _obj_arg_handler = lookup(obj_args.sig_cc(), obj_args.has_inline_recv());
3537
3538 CompiledEntrySignature int_args;
3539 SigEntry::add_entry(int_args.sig(), T_INT);
3540 int_args.compute_calling_conventions();
3541 _int_arg_handler = lookup(int_args.sig_cc(), int_args.has_inline_recv());
3542
3543 CompiledEntrySignature obj_int_args;
3544 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
3545 SigEntry::add_entry(obj_int_args.sig(), T_INT);
3546 obj_int_args.compute_calling_conventions();
3547 _obj_int_arg_handler = lookup(obj_int_args.sig_cc(), obj_int_args.has_inline_recv());
3548
3549 CompiledEntrySignature obj_obj_args;
3550 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3551 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3552 obj_obj_args.compute_calling_conventions();
3553 _obj_obj_arg_handler = lookup(obj_obj_args.sig_cc(), obj_obj_args.has_inline_recv());
3554
3555 assert(_no_arg_handler != nullptr &&
3556 _obj_arg_handler != nullptr &&
3557 _int_arg_handler != nullptr &&
3558 _obj_int_arg_handler != nullptr &&
3559 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3560 assert(_no_arg_handler->is_linked() &&
3561 _obj_arg_handler->is_linked() &&
3562 _int_arg_handler->is_linked() &&
3563 _obj_int_arg_handler->is_linked() &&
3564 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3565 }
3566 #endif // INCLUDE_CDS
3567
3568 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3569 LogStreamHandle(Trace, aot) lsh;
3570 if (lsh.is_enabled()) {
3571 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3572 lsh.cr();
3573 }
3574 it->push(&_fingerprint);
3575 }
3576
3577 AdapterHandlerEntry::~AdapterHandlerEntry() {
3578 if (_fingerprint != nullptr) {
3579 AdapterFingerPrint::deallocate(_fingerprint);
3580 _fingerprint = nullptr;
3581 }
3582 if (_sig_cc != nullptr) {
3583 delete _sig_cc;
3584 }
3585 if (_sig_cc_ro != nullptr) {
3586 delete _sig_cc_ro;
3587 }
3588 #ifdef ASSERT
3589 FREE_C_HEAP_ARRAY(_saved_code);
3590 #endif
3591 FreeHeap(this);
3592 }
3593
3594
3595 #ifdef ASSERT
3596 // Capture the code before relocation so that it can be compared
3597 // against other versions. If the code is captured after relocation
3598 // then relative instructions won't be equivalent.
3599 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3600 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3601 _saved_code_length = length;
3602 memcpy(_saved_code, buffer, length);
3603 }
3604
3605
3606 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3607 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3655
3656 struct { double data[20]; } locs_buf;
3657 struct { double data[20]; } stubs_locs_buf;
3658 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3659 #if defined(AARCH64) || defined(PPC64)
3660 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3661 // in the constant pool to ensure ordering between the barrier and oops
3662 // accesses. For native_wrappers we need a constant.
3663 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3664 // static java call that is resolved in the runtime.
3665 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3666 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3667 }
3668 #endif
3669 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3670 MacroAssembler _masm(&buffer);
3671
3672 // Fill in the signature array, for the calling-convention call.
3673 const int total_args_passed = method->size_of_parameters();
3674
3675 BasicType stack_sig_bt[16];
3676 VMRegPair stack_regs[16];
3677 BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
3678 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3679
3680 int i = 0;
3681 if (!method->is_static()) { // Pass in receiver first
3682 sig_bt[i++] = T_OBJECT;
3683 }
3684 SignatureStream ss(method->signature());
3685 for (; !ss.at_return_type(); ss.next()) {
3686 sig_bt[i++] = ss.type(); // Collect remaining bits of signature
3687 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) {
3688 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots
3689 }
3690 }
3691 assert(i == total_args_passed, "");
3692 BasicType ret_type = ss.type();
3693
3694 // Now get the compiled-Java arguments layout.
3695 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3696
3697 // Generate the compiled-to-native wrapper code
3698 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3699
3700 if (nm != nullptr) {
3701 {
3702 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3703 if (nm->make_in_use()) {
3704 method->set_code(method, nm);
3705 }
3706 }
3707
3708 CompilerDirectiveMatcher matcher(method, CompLevel_simple);
3709 if (matcher.directive_set()->PrintAssemblyOption) {
3710 nm->print_code();
3711 }
3712 }
3919 if (b == handler->adapter_blob()) {
3920 found = true;
3921 st->print("Adapter for signature: ");
3922 handler->print_adapter_on(st);
3923 return false; // abort iteration
3924 } else {
3925 return true; // keep looking
3926 }
3927 };
3928 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3929 _adapter_handler_table->iterate(findblob_runtime_table);
3930 }
3931 assert(found, "Should have found handler");
3932 }
3933
3934 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3935 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3936 if (adapter_blob() != nullptr) {
3937 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3938 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3939 st->print(" c2iVE: " INTPTR_FORMAT, p2i(get_c2i_inline_entry()));
3940 st->print(" c2iVROE: " INTPTR_FORMAT, p2i(get_c2i_inline_ro_entry()));
3941 st->print(" c2iUE: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3942 st->print(" c2iUVE: " INTPTR_FORMAT, p2i(get_c2i_unverified_inline_entry()));
3943 if (get_c2i_no_clinit_check_entry() != nullptr) {
3944 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3945 }
3946 }
3947 st->cr();
3948 }
3949
3950 #ifndef PRODUCT
3951
3952 void AdapterHandlerLibrary::print_statistics() {
3953 print_table_statistics();
3954 }
3955
3956 #endif /* PRODUCT */
3957
3958 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3959 assert(current == JavaThread::current(), "pre-condition");
3960 StackOverflow* overflow_state = current->stack_overflow_state();
3961 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3962 overflow_state->set_reserved_stack_activation(current->stack_base());
4009 event.set_method(method);
4010 event.commit();
4011 }
4012 }
4013 }
4014 return activation;
4015 }
4016
4017 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
4018 // After any safepoint, just before going back to compiled code,
4019 // we inform the GC that we will be doing initializing writes to
4020 // this object in the future without emitting card-marks, so
4021 // GC may take any compensating steps.
4022
4023 oop new_obj = current->vm_result_oop();
4024 if (new_obj == nullptr) return;
4025
4026 BarrierSet *bs = BarrierSet::barrier_set();
4027 bs->on_slowpath_allocation_exit(current, new_obj);
4028 }
4029
4030 // We are at a compiled code to interpreter call. We need backing
4031 // buffers for all inline type arguments. Allocate an object array to
4032 // hold them (convenient because once we're done with it we don't have
4033 // to worry about freeing it).
4034 oop SharedRuntime::allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, bool from_c1, TRAPS) {
4035 assert(InlineTypePassFieldsAsArgs, "no reason to call this");
4036 ResourceMark rm;
4037
4038 // Retrieve arguments passed at the call
4039 RegisterMap reg_map2(THREAD,
4040 RegisterMap::UpdateMap::include,
4041 RegisterMap::ProcessFrames::include,
4042 RegisterMap::WalkContinuation::skip);
4043 frame stubFrame = THREAD->last_frame();
4044 frame callerFrame = stubFrame.sender(®_map2);
4045 if (from_c1) {
4046 callerFrame = callerFrame.sender(®_map2);
4047 }
4048 int arg_size;
4049 const GrowableArray<SigEntry>* sig = allocate_receiver ? callee->adapter()->get_sig_cc() : callee->adapter()->get_sig_cc_ro();
4050 assert(sig != nullptr, "sig should never be null");
4051 TempNewSymbol tmp_sig = SigEntry::create_symbol(sig);
4052 VMRegPair* reg_pairs = find_callee_arguments(tmp_sig, false, false, &arg_size);
4053
4054 int nb_slots = 0;
4055 InstanceKlass* holder = callee->method_holder();
4056 allocate_receiver &= !callee->is_static() && holder->is_inline_klass() && callee->is_scalarized_arg(0);
4057 if (allocate_receiver) {
4058 nb_slots++;
4059 }
4060 int arg_num = callee->is_static() ? 0 : 1;
4061 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4062 BasicType bt = ss.type();
4063 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4064 nb_slots++;
4065 }
4066 if (bt != T_VOID) {
4067 arg_num++;
4068 }
4069 }
4070 objArrayOop array_oop = nullptr;
4071 objArrayHandle array;
4072 arg_num = callee->is_static() ? 0 : 1;
4073 int i = 0;
4074 uint pos = 0;
4075 uint depth = 0;
4076 uint ignored = 0;
4077 if (allocate_receiver) {
4078 assert(sig->at(pos)._bt == T_METADATA, "scalarized value expected");
4079 pos++;
4080 ignored++;
4081 depth++;
4082 assert(sig->at(pos)._bt == T_OBJECT, "buffer argument");
4083 uint reg_pos = 0;
4084 assert(reg_pos < (uint)arg_size, "");
4085 VMRegPair reg_pair = reg_pairs[reg_pos];
4086 oop* buffer = callerFrame.oopmapreg_to_oop_location(reg_pair.first(), ®_map2);
4087 instanceHandle h_buffer(THREAD, (instanceOop)*buffer);
4088 InlineKlass* vk = InlineKlass::cast(holder);
4089 if (h_buffer.not_null()) {
4090 assert(h_buffer->klass() == vk, "buffer not of expected class");
4091 } else {
4092 // Only allocate if buffer passed at the call is null
4093 if (array_oop == nullptr) {
4094 array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4095 array = objArrayHandle(THREAD, array_oop);
4096 }
4097 oop res = vk->allocate_instance(CHECK_NULL);
4098 array->obj_at_put(i, res);
4099 }
4100 i++;
4101 }
4102 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4103 BasicType bt = ss.type();
4104 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4105 while (true) {
4106 BasicType bt = sig->at(pos)._bt;
4107 if (bt == T_METADATA) {
4108 depth++;
4109 ignored++;
4110 if (depth == 1) {
4111 break;
4112 }
4113 } else if (bt == T_VOID && sig->at(pos - 1)._bt != T_LONG && sig->at(pos - 1)._bt != T_DOUBLE) {
4114 ignored++;
4115 depth--;
4116 }
4117 pos++;
4118 }
4119 pos++;
4120 assert(sig->at(pos)._bt == T_OBJECT, "buffer argument expected");
4121 uint reg_pos = pos - ignored;
4122 assert(reg_pos < (uint)arg_size, "out of bound register?");
4123 VMRegPair reg_pair = reg_pairs[reg_pos];
4124 oop* buffer = callerFrame.oopmapreg_to_oop_location(reg_pair.first(), ®_map2);
4125 instanceHandle h_buffer(THREAD, (instanceOop)*buffer);
4126 InlineKlass* vk = ss.as_inline_klass(holder);
4127 assert(vk != nullptr, "Unexpected klass");
4128 if (h_buffer.not_null()) {
4129 assert(h_buffer->klass() == vk, "buffer not of expected class");
4130 } else {
4131 // Only allocate if buffer passed at the call is null
4132 if (array_oop == nullptr) {
4133 array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4134 array = objArrayHandle(THREAD, array_oop);
4135 }
4136 oop res = vk->allocate_instance(CHECK_NULL);
4137 array->obj_at_put(i, res);
4138 }
4139 i++;
4140 }
4141 if (bt != T_VOID) {
4142 arg_num++;
4143 }
4144 }
4145 return array();
4146 }
4147
4148 JRT_ENTRY(void, SharedRuntime::allocate_inline_types(JavaThread* current, Method* callee_method, bool allocate_receiver))
4149 methodHandle callee(current, callee_method);
4150 oop array = SharedRuntime::allocate_inline_types_impl(current, callee, allocate_receiver, false, CHECK);
4151 current->set_vm_result_oop(array);
4152 JRT_END
4153
4154 // We're returning from an interpreted method: load each field into a
4155 // register following the calling convention
4156 JRT_LEAF(void, SharedRuntime::load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res))
4157 {
4158 assert(res->klass()->is_inline_klass(), "only inline types here");
4159 ResourceMark rm;
4160 RegisterMap reg_map(current,
4161 RegisterMap::UpdateMap::include,
4162 RegisterMap::ProcessFrames::include,
4163 RegisterMap::WalkContinuation::skip);
4164 frame stubFrame = current->last_frame();
4165 frame callerFrame = stubFrame.sender(®_map);
4166 assert(callerFrame.is_interpreted_frame(), "should be coming from interpreter");
4167
4168 InlineKlass* vk = InlineKlass::cast(res->klass());
4169
4170 const Array<SigEntry>* sig_vk = vk->extended_sig();
4171 const Array<VMRegPair>* regs = vk->return_regs();
4172
4173 if (regs == nullptr) {
4174 // The fields of the inline klass don't fit in registers, bail out
4175 return;
4176 }
4177
4178 int j = 1;
4179 for (int i = 0; i < sig_vk->length(); i++) {
4180 BasicType bt = sig_vk->at(i)._bt;
4181 if (bt == T_METADATA) {
4182 continue;
4183 }
4184 if (bt == T_VOID) {
4185 if (sig_vk->at(i-1)._bt == T_LONG ||
4186 sig_vk->at(i-1)._bt == T_DOUBLE) {
4187 j++;
4188 }
4189 continue;
4190 }
4191 int off = sig_vk->at(i)._offset;
4192 assert(off > 0, "offset in object should be positive");
4193 VMRegPair pair = regs->at(j);
4194 address loc = reg_map.location(pair.first(), nullptr);
4195 guarantee(loc != nullptr, "bad register save location");
4196 switch(bt) {
4197 case T_BOOLEAN:
4198 *(jboolean*)loc = res->bool_field(off);
4199 break;
4200 case T_CHAR:
4201 *(jchar*)loc = res->char_field(off);
4202 break;
4203 case T_BYTE:
4204 *(jbyte*)loc = res->byte_field(off);
4205 break;
4206 case T_SHORT:
4207 *(jshort*)loc = res->short_field(off);
4208 break;
4209 case T_INT: {
4210 *(jint*)loc = res->int_field(off);
4211 break;
4212 }
4213 case T_LONG:
4214 #ifdef _LP64
4215 *(intptr_t*)loc = res->long_field(off);
4216 #else
4217 Unimplemented();
4218 #endif
4219 break;
4220 case T_OBJECT:
4221 case T_ARRAY: {
4222 *(oop*)loc = res->obj_field(off);
4223 break;
4224 }
4225 case T_FLOAT:
4226 *(jfloat*)loc = res->float_field(off);
4227 break;
4228 case T_DOUBLE:
4229 *(jdouble*)loc = res->double_field(off);
4230 break;
4231 default:
4232 ShouldNotReachHere();
4233 }
4234 j++;
4235 }
4236 assert(j == regs->length(), "missed a field?");
4237
4238 #ifdef ASSERT
4239 VMRegPair pair = regs->at(0);
4240 address loc = reg_map.location(pair.first(), nullptr);
4241 assert(*(oopDesc**)loc == res, "overwritten object");
4242 #endif
4243
4244 current->set_vm_result_oop(res);
4245 }
4246 JRT_END
4247
4248 // We've returned to an interpreted method, the interpreter needs a
4249 // reference to an inline type instance. Allocate it and initialize it
4250 // from field's values in registers.
4251 JRT_BLOCK_ENTRY(void, SharedRuntime::store_inline_type_fields_to_buf(JavaThread* current, intptr_t res))
4252 {
4253 if (!is_set_nth_bit(res, 0)) {
4254 // We're not returning with inline type fields in registers (the
4255 // calling convention didn't allow it for this inline klass)
4256 assert(!Metaspace::contains((void*)res), "should be oop or pointer in buffer area");
4257 current->set_vm_result_oop((oopDesc*)res);
4258 current->set_vm_result_metadata(nullptr);
4259 return;
4260 }
4261
4262 clear_nth_bit(res, 0);
4263 InlineKlass* vk = (InlineKlass*)res;
4264 assert(Metaspace::contains((void*)res), "should be klass");
4265
4266 if (!vk->contains_oops()) {
4267 // No oop fields. Initialize the fields by calling the pack handler from
4268 // the stub which is much faster (see 'generate_return_value_stub').
4269 // Signal this by setting the metadata result to the value klass.
4270 JRT_BLOCK;
4271 {
4272 oop vt = vk->allocate_instance(CHECK);
4273 current->set_vm_result_oop(vt);
4274 current->set_vm_result_metadata(vk);
4275 }
4276 JRT_BLOCK_END;
4277 return;
4278 }
4279
4280 ResourceMark rm;
4281 RegisterMap reg_map(current,
4282 RegisterMap::UpdateMap::include,
4283 RegisterMap::ProcessFrames::include,
4284 RegisterMap::WalkContinuation::skip);
4285 frame stubFrame = current->last_frame();
4286 stubFrame.sender(®_map);
4287
4288 assert(vk == InlineKlass::returned_inline_klass(reg_map), "broken calling convention");
4289
4290 // Allocate handles for every oop field so they are safe in case of
4291 // a safepoint when allocating
4292 GrowableArray<Handle> handles;
4293 vk->save_oop_fields(reg_map, handles);
4294
4295 // It's unsafe to safepoint until we are here
4296 JRT_BLOCK;
4297 {
4298 oop vt = vk->realloc_result(reg_map, handles, CHECK);
4299 current->set_vm_result_oop(vt);
4300 current->set_vm_result_metadata(nullptr);
4301 }
4302 JRT_BLOCK_END;
4303 }
4304 JRT_END
|